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WQMP2017-0003 Temp Clubhouse2015 Whitewater River Region WQMP Project Specific Water Quality Management Plan (Final) WQMP For: SilverRock Resort Temporary Clubhouse (Portion of Parcel 1, PM 37207) 79087 Ahmanson Lane, La Quinta, CA 92253 DEVELOPMENT NO. SDP 2017-0013 RESOLUTION NO. 2017-056 Prepared for: SilverRock Development Company, LLC Robert S. Green, Jr. 3551 Fortuna Ranch Road Encinitas, CA 92024 Telephone: 760-634-6543 Prepared by: Daniel Koravos, P.E. Project Manager Michael Baker International 75410 Gerald Ford Drive, Suite 100 Palm Desert, CA 92211 Telephone: 760-346-7481 Original Date Prepared: November 2018 Revision Date(s): 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse OWNER'S CERTIFICATION This project -specific Water Quality Management Plan (WQMP) has been prepared for: The City of La Quiuta by Michael Baker International for the project known as SilverRock Resort Temporary Clubhouse (Portion of Parcel I, PM 37207) at 79087 Ahmanson Lane, La Quinta, CA 92253 This WQMP is intended to comply with the requirements of City of La Quinta, CA, SDI' NO. 2017- 0013, which includes the requirement for the preparation and implementation ofa project -specific WQMP. The undersigned, while owning the property project described in the preceding paragraph_ shall be responsible for the implementation of this WQMP and "ill ensure that [his WQMP is amended as appropriate to reflect up-to-date conditions on the site. This WQMP will be reviewed tiith the facility operator, facility supervisors, employees, tenants, maintenance and service contractors, or ally other party (or parties) having responsibility for implementing portions of this WQMP. At least one copy of this WQMP will be maintained at the project site or project office in perpetuity. The undersigned is authorized to certify and to approve implementation ol'this WQMI'. The undersigned is aware that implementation of this WQMP is enforceable under City of La Quinta, CA Wald- Qualil% Ordinance (Municipal Code Section 8.70.070). If the undersigned transfers its interest in the subiect property/project, the undersigned shall notify the successor in interest of its responsibility to implement this WQMP. "I, the undersigned, certify under penally of law that I am the owner of the property that is the subject ul this WQMP, and that the provisions of this WQMP have been reviewed and accepted and that [he WQMP will he transferred to firture successors in interest." ATTEST Oeri rs Signature Brvan W. McKinney Owner's Printed Name City Engineer for Cit; of La Quinta Owner's Title/Position %12/22- Date 78-495 Calle Tampico La Quinta, CA 92253 760-777-7045 THIS FORM SHALL BE NOTARIZED BEFORE ACCEPTANCE OF TI IE FINAL PROJECT SPECIFIC WQMP A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document, to which this certificate is attached, and not the truthfulness, accuracy, or validity of that document State of California County of Riverside On JULY 12, 2022 before me, __ LAURIE MCGINLEY , Notary Public, personally appeared BRYAN MCKI_NNEY who proved to me on the basis of satisfactory evidence to be the person whose name is subscribed to the within instrument, and acknowledged to me that he executed the same in his authorized capacity, and that by his signature on the instrument the person, or the entity upon behalf of which the person acted, executed the instrument. I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct. WITNESS my hand and official seal. LAURIE 1AM-1,EY MotOry public CI fMnY Rr.ecud• C*unty C Camm'1110n a 2377707 S i g n a t u r�'` w :a�*T. Ei.vM OC: 1. 70:� (seal) DOCUMENT: OWNER'S CERTIFICATION re: WQMP FOR SILVERROCK RESORT TEMPORARY CLUBHOUSE 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse Contents SECTIONS PAGE I. Project Description.........................................................................................................................I II. Site Characterization.....................................................................................................................5 III. Pollutants of Concern.....................................................................................................................7 IV. Hydrologic Conditions of Concern..............................................................................................8 V. Best Management Practices..........................................................................................................9 V.1 SITE DESIGN BMP CONCEPTS, LID/SITE DESIGN AND TREATMENT CONTROL BMPS...... 9 V. LA SITE DESIGN BMP CONCEPTS AND LID/SITE DESIGN BMPS................................. 11 V. LB TREATMENT CONTROL BMPS................................................................................ 19 V. LC MEASURABLE GOAL SUMMARY.............................................................................21 V.2 SOURCE CONTROL BMPS................................................................................................. 22 V.3 EQUIVALENT TREATMENT CONTROL BMP ALTERNATIVES ............................................ 26 VA REGIONALLY -BASED BMPS.............................................................................................26 VI. Operation and Maintenance Responsibility for BMPs..........................................................27 VH. Funding..........................................................................................................................................29 TABLES TABLE 1. POLLUTANT OF CONCERN SUMMARY 7 TABLE 2. BMP SELECTION MATRIX BASED UPON POLLUTANT OF CONCERN REMOVAL EFFICIENCY 10 TABLE 3. IMPLEMENTATION OF SITE DESIGN BMP CONCEPTS 12 TABLE 4. LID/SITE DESIGN BMPS MEETING THE LID/SITE DESIGN MEASURABLE GOAL 18 TABLE 5: TREATMENT CONTROL BMP SUMMARY 20 TABLE 6: MEASURABLE GOAL SUMMARY 21 TABLE 7. SOURCE CONTROL BMPS 22 A Ppviv lir'F.0 A. CONDITIONS OF APPROVAL — CITY COUNCIL RESOLUTION No. 2017-056, DATED: 11 /07/2017 B. VICINITY MAP, WQMP SITE PLAN, AND RECEIVING WATERS MAP C. SUPPORTING DETAIL RELATED TO HYDROLOGIC CONDITIONS OF CONCERN (IF APPLICABLE) D. EDUCATIONAL MATERIALS E. SOILS REPORT (IF APPLICABLE) — BY: SLADDEN ENGINEERING, REPORT No. 544-14059/18-04-187, DATED: 11/12/2018 F. STRUCTURAL BMP AND/OR RETENTION FACILITY SIZING CALCULATIONS AND DESIGN DETAILS G. AGREEMENTS — CC&RS, COVENANT AND AGREEMENTS, BMP MAINTENANCE AGREEMENTS AND/OR OTHER MECHANISMS FOR ENSURING ONGOING OPERATION, MAINTENANCE, FUNDING AND TRANSFER OF REQUIREMENTS FOR THIS PROJECT -SPECIFIC WQMP H. PHASE 1 ENVIRONMENTAL SITE ASSESSMENT — SUMMARY OF SITE REMEDIATION CONDUCTED AND USE RESTRICTIONS I. PROJECT -SPECIFIC WQMP SUMMARY DATA FORM November 2018 1-i 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse I. Project Description Project Owner: City of La Quinta 78-495 Calle Tampico LA Quinta, CA 92253 760-777-7045 (Engineering) WQMP Preparer: Michael Baker International 75410 Gerald Ford Drive, Suite 100 Palm Desert, CA 92211 760-346-7481 (Office) Project Site Address: 79087 Ahmanson Lane, La Quinta, CA 92253 Planning Area/ Coachella Valley Planning Area Community Name/ City of La Quinta Development Name: SDP No. 2017-0013, SilverRock Temporary Clubhouse APN Number(s): 777-490-007 Latitude & Longitude: 33.6697,-116.2823 Receiving Water: Coachella Valley Stormwater Channel Project Site Size: 3.0 Acres Standard Industrial Classification (SIC) Code: Formation of Home Owners' Association (HOA) or Property Owners Association (POA): 1522, & 7997 November 2018 1-1 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse Additional Permits/Approvals required for the Project: AGENCY Permit required State Department of Fish and Wildlife, Fish and Game Code § 1602 Streambed Alteration Agreement Y ❑ N® State Water Resources Control Board, Clean Water Act (CWA) Section 401 Water Quality Certification Y ❑ N® US Army Corps of Engineers, CWA Section 404 permit Y N® US Fish and Wildlife, Endangered Species Act Section 7 biological opinion Y NX Statewide Construction General Permit Coverage Y ® N❑ Statewide Industrial General Permit Coverage Y ❑ N® Other (please list in the space below as required) City of La Quinta Grading Permit Y ® N❑ City of La Quinta Building Permit Y ® N❑ November 2018 1-2 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse This report is prepared by Michael Baker International for Owner -City of La Quinta, addresses the SilverRock Temporary Clubhouse project (Portion of Parcel 1, PM 37207; SDP No. 2017-0013). The project is located at 79087 Ahmanson Lane, La Quinta, CA 92253 in the City of La Quinta. The site is approximately 3.0 acres, practice range adjacent, and includes the installation of a modular building unit to house a temporary clubhouse, vehicle parking lot, overflow parking and covered golf cart parking. The temporary clubhouse and site improvements will be utilized for a time frame of approximately two to three years. The total size of disturbed area is 2.4 acres. Pre - project quantity of impervious surface is zero acres (0%); Post -project quantity of impervious surface is 0.8 acre (20%). Site sheet flows northwesterly then northerly to low points where it percolates, evapotranspires and infiltrates. Portion of the site sheet flows easterly towards existing curb at westerly side of Ahmanson Lane, flow southerly to a catch basin and end up at the existing Drywell, where it percolates and infiltrate. Typical activities associated with this type of development include incoming and outgoing vehicle traffic, events and parking, landscape maintenance, use and maintenance of golf course vehicles, and use of trash/recycle bins. The potential pollutants generated by this land use type include sediments, nutrients, organic compounds, trash and debris, bacteria and viruses, oil and grease, and metals. Appendix A of this project -specific WQMP includes a complete copy of the final Conditions of Approval. See Appendix B for Project Vicinity Map, WQMP Site Plan, and Receiving Waters Map. Appendix B of this project -specific WQMP includes: a. A Vicinity Map identifying the project site and surrounding planning areas in sufficient detail; and b. A Site Plan for the project. The Site Plan included as part of Appendix B depicts the following project features: ■ Location and identification of all structural BMPs, including Source Control, LID/Site Design and Treatment Control BMPs. ■ Landscaped areas. ■ Paved areas and intended uses (i.e., parking, outdoor work area, outdoor material storage area, sidewalks, patios, tennis courts, etc.). ■ Number and type of structures and intended uses (i.e., buildings, tenant spaces, dwelling units, community facilities such as pools, recreation facilities, tot lots, etc.). ■ Infrastructure (i.e., streets, storm drains, etc.) that will revert to public agency ownership and operation. ■ Location of existing and proposed public and private storm drainage facilities (i.e., storm drains, channels, basins, etc.), including catch basins and other inlets/outlet structures. Existing and proposed drainage facilities should be clearly differentiated. ■ Location(s) of Receiving Waters to which the project directly or indirectly discharges. November 2018 1-3 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse ■ Location of points where onsite (or tributary offsite) flows exit the property/project site. ■ Delineation of proposed drainage area boundaries, including tributary offsite areas, for each location where flows exit the project site and existing site (where existing site flows are required to be addressed). Each tributary area should be clearly denoted. ■ Pre- and post -project topography. Appendix I is a one page form that summarizes pertinent information relative to this project - specific WQMP. November 2018 1-4 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse II. Site Characterization Land Use Designation or Zoning: CT = Tourist Commercial, GC= Golf Course (SP 06-080 SilverRock Resort) Current Property Use: Graded with Golf Course, Lakes, Club House, Golf Maintence area and Utilities installed - (SP 06-080 SilverRock Resort) Proposed Property Use: Temp Clubhouse, SDP2017-0013, (SP 06-080 SilverRock Resort) Availability of Soils Report: Y ® N ❑ Note: A soils report is required if infiltration BMPs are utilized. Attach report in Appendix E. Phase 1 Site Assessment: Y ® N ❑ Note: If prepared, attached remediation summary and use restrictions in Appendix H. November 2018 1-5 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse Receiving Waters for Urban Runoff from Site Proximity to RARE Receiving EPA Approved 303(d) List Designated Beneficial Use Waters Impairments Beneficial Uses Designated Receiving Waters Coachella Valley Pathogens, Toxaphene, FRSH, REC I, REC Stormwater Dieldrin, DDT, PCBs, II, WARM, WILD +/- 4 Miles Channel Nitrogen, Ammonia (Total & RARE Ammonia), and Toxicity November 2018 1-6 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse III. Pollutants of Concern Table 1. Pollutant of Concern Summary Pollutant Category Potential for Project and/or Existing Site Causing Receiving Water Impairment BacteriaNirus/Pathogens YES YES Heavy Metals YES NO Nutrients YES NO Toxic Organic Compounds YES NO Sediment/Turbidity YES NO Trash & Debris YES NO Oil & Grease YES NO Other (Toxaphene): NO YES Other (Dieldrin): NO YES Other (DDT): NO YES Other (PCBs) NO YES Nitrogen, Ammonia (Total Ammonia) NO YES Toxicity NO YES NOTE: TOXAPHENE, DIELDRIN, DDT, AND PCBs ARE BANNED SUBSTANCES IN THE UNITED STATES. November 2018 1-7 2015 Whitewater River Region WQMP SilverRock Resort -Temporary Clubhouse IV. Hydrologic Conditions of Concern Local Jurisdiction Requires On -Site Retention of Urban Runoff: Yes ® The project will be required to retain urban runoff onsite in conformance with local ordinance (See Table 6 of the WQMP Guidance document, "Local Land use Authorities Requiring Onsite Retention of Stormwater"). This section does not need to be completed; however, retention facility design details and sizing calculations must be included in Appendix F. No ❑ This section must be completed. This Project meets the following condition: ❑ Condition A: 1) Runoff from the Project is discharged directly to a publicly -owned, operated and maintained MS4 or engineered and maintained channel, 2) the discharge is in full compliance with local land use authority requirements for connections and discharges to the MS4 (including both quality and quantity requirements), 3) the discharge would not significantly impact stream habitat in proximate Receiving Waters, and 4) the discharge is authorized by the local land use authority. ❑ Condition B: The project disturbs less than 1 acre and is not part of a larger common plan of development that exceeds I acre of disturbance. The disturbed area calculation must include all disturbances associated with larger plans of development. ❑ Condition C: The project's runoff flow rate, volume, velocity and duration for the post -development condition do not exceed the pre -development condition for the 2- year, 24-hour and 10-year 24-hour rainfall events. This condition can be achieved by, where applicable, complying with the local land use authority's on -site retention ordinance, or minimizing impervious area on a site and incorporating other Site - Design BMP concepts and LID/Site Design BMPs that assure non-exceedance of pre -development conditions. This condition must be substantiated by hydrologic modeling methods acceptable to the local land use authority. ❑ None: Refer to Section 3.4 of the Whitewater River Region WQMP Guidance document for additional requirements. Supporting engineering studies, calculations, and reports are included in Appendix C. 2 year — 24 hour 10 year — 24 hour Precondition Post -condition Precondition Post -condition Discharge (cfs) Velocity (fps) I Volume (cubic feet) I Duration (minutes) I November 2018 1-8 2015 Whitewater River Region WQMP SilverRock Resort (PM 37207) — Temporary Clubhouse V. Best Management Practices This project implements Best Management Practices (BMPs) to address the Pollutants of Concern that may potentially be generated from the use of the Project site plus existing site area(s). These BMPs have been selected and implemented to comply with Section 3.5 of the WQMP Guidance document, and consist of Site Design BMP concepts, Source Control, LID/Site Design and, if/where necessary, Treatment Control BMPs as described herein. VA SITE DESIGN BMP CONCEPTS, LID/SITE DESIGN AND TREATMENT CONTROL BMPs Local Jurisdiction Requires On -Site Retention of Urban Runoff: Yes ® The project will be required to retain Urban Runoff onsite in conformance with local ordinance (See Table 6 of the WQMP Guidance document, "Local Land use Authorities Requiring Onsite Retention of Stormwater). The LID/Site Design measurable goal has thus been met (100%), and Sections V.I.A and V.1.13 do not need to be completed; however, retention facility design details and sizing calculations must be included in Appendix F, and ' 100%' should be entered into Column 3 of Table 6 below. No ❑ Section V.1 must be completed. This section of the Project -Specific WQMP documents the LID/Site Design BMPs and, if/where necessary, the Treatment Control BMPs that will be implemented on the project to meet the requirements detailed within Section 3.5.1 of the WQMP Guidance document. Section 3.5.1 includes requirements to implement Site Design Concepts and BMPs, and includes requirements to address Pollutants of Concern with BMPs. Further, sub -section 3.5.1.1 specifically requires that Pollutants of Concern be addressed with LID/Site Design BMPs to the extent feasible. LID/Site Design BMPs are those BMPs listed within Table 2 below which promote retention and/or feature a natural treatment mechanism; off -site and regionally -based BMPs are also LID/Site Design BMPs, and therefore count towards the measurable goal, if they fit these criteria. This project incorporates LID/Site Design BMPs to fully address the Treatment Control BMP requirement where and to the extent feasible. If and where it has been acceptably demonstrated to the local land use authority that it is infeasible to fully meet this requirement with LID/Site Design BMPs, Section V.1.B (below) includes a description of the conventional Treatment Control BMPs that will be substituted to meet the same requirements. In addressing Pollutants of Concern, BMPs are selected using Table 2 below. November 2017 1-9 2015 Whitewater River Region WQMP SilverRock Resort (PM 37207) — Temporary Clubhouse Table 2. BMP Selection Matrix Based Upon Pollutant of Concern Removal Efficiency (1) (Sources: Riverside County Flood Control & Water Conservation District Design Handbook for Low Impact Development Best Management Practices, dated September 2011, the Orange County Technical Guidance Document for Water Quality Management Plans, dated May 19, 2011, and the Caltrans Treatment BMP Technology Report, dated April 2010 and April 2008) cc NIJ 2- O � - V: i _ c� Pollutant of Q Z5 o -C �, m Concern U U - .O C to CD m ii -cc - 2 °' (�6 O m. N U) _0 c m � _ 0- m O Q (E J cu W U) L O Sediment & M M H M H H H H H Turbidity Nutrients L/M L/M M L/M L/M H H H H Toxic Organic M/H M/H M/H L L/M H H H H o Compounds a Trash & Debris L L H H H H H L H Bacteria & Viruses L M H L M H H H H 6 (also: Pathogens) Oil & Grease M M H M H H H H H Heavy Metals M M/H M/H L/M M H H H H Abbreviations: L: Low removal efficiency M: Medium removal efficiency H: High removal efficiency Notes: (1) Periodic performance assessment and updating of the guidance provided by this table may be necessary. (2) Expected performance when designed in accordance with the most current edition of the document, "Riverside County, Whitewater River Region Stormwater Quality Best Management Practice Design Handbook". (3) Performance dependent upon design which includes implementation of thick vegetative cover. Local water conservation and/or landscaping requirements should be considered; approval is based on the discretion of the local land use authority. (4) Includes proprietary stormwater treatment devices as listed in the CASQA Stormwater Best Management Practices Handbooks, other stormwater treatment BMPs not specifically listed in this WQMP (including proprietary filters, hydrodynamic separators, inserts, etc.), or newly developed/emerging stormwater treatment technologies. (5) Expected performance should be based on evaluation of unit processes provided by BMP and available testing data. Approval is based on the discretion of the local land use authority. (6) When used for primary treatment as opposed to pre-treatment, requires site -specific approval by the local land use authority. November 2017 1-10 2015 Whitewater River Region WQMP SilverRock Resort (PM 37207) — Temporary Clubhouse V.1.A SITE DESIGN BMP CONCEPTS AND LID/SITE DESIGN BMPS* This section documents the Site Design BMP concepts and LID/Site Design BMPs that will be implemented on this project to comply with the requirements detailed in Section 3.5.1 of the WQMP Guidance document. • Table 3 herein documents the implementation of the Site Design BMP Concepts described in sub -sections 3.5.1.3 and 3.5.1.4. • Table 4 herein documents the extent to which this project has implemented the LID/Site Design goals described in sub -section 3.5.1.1. *(NOTE: Sections V.1.A and V.1.13 do not need to be completed since flow is retained onsite) November 2017 1-11 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Portion of Parcel 1, PM 37207) Table 3. Implementation of Site Design BMP Concepts Included Brief Reason for BMPs Design Concept Technique Specific BMP Yes No N/A Indicated as No or N/A Conserve natural areas by concentrating or clustering development on the least environmentally sensitive portions of a ® ❑ ❑ site while leaving the remaining land in a natural, undisturbed condition. Conserve natural areas by incorporating the goals of the Multi - Species Habitat Conservation Plan or other natural resource ® ❑ ❑ plans. Preserve natural drainage features and natural depressional ® ❑ ❑ Minimize Urban storage areas on the site. Runoff, Maximize canopy interception and water conservation by c Minimize preserving existing native trees and shrubs, and planting ® ❑ ❑ 0. Impervious additional native or drought tolerant trees and large shrubs. Footprint, and Conserve Use natural drainage systems. ® El El ,tc t Natural Areas Where applicable, incorporate Self -Treating Areas ® ❑ ❑ q (See WQMP Where applicable, incorporate Self -Retaining Areas ® ❑ ❑ of vj Section 3.5.1.3) Increase the building floor to area ratio (i.e., number of stories ❑ ❑ ® Proposed building 1-story portable structure above or below ground). Construct streets, sidewalks and parking lot aisles to minimum widths necessary, provided that public safety and a walkable ❑ ❑ ❑ environment for pedestrians are not compromised. Reduce widths of streets where off-street parking is available. ❑ ❑ ❑ Minimize the use of impervious surfaces, such as decorative ® ❑ ❑ concrete, in the landscape design. November 2017 1-12 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Portion of Parcel 1, PM 37207) Almost half of the drainage area will be Other comparable and equally effective Site Design BMP draining to existing curb and gutter that concept(s) as approved by the local land use authority (Note: ® ❑ ❑ flows towards an existing catch basin and eventually ended up to an existing Dry Well. Additional narrative required to describe BMP and how it The other half drains northerly and southerly addresses site design concept). towards an existing lower Golf Tees and/or existing lake. November 2017 1-13 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Portion of Parcel 1, PM 37207) Table 3. Site Design BMP Concepts (continued) Included Brief Reason for Each BMP Design Concept Technique Specific BMP Yes No N/A Indicated as No or N/A Design residential and commercial sites to contain and infiltrate roof ❑ ❑ ❑ runoff, or direct roof runoff to landscaped swales or buffer areas. Drain impervious sidewalks, walkways, trails, and patios into adjacent ® ❑ ❑ landscaping. Incorporate landscaped buffer areas between sidewalks and streets. ❑ ❑ ® No sidewalks and streets for this project. Use natural or landscaped drainage swales in lieu of underground ® ❑ ❑ piping or imperviously lined swales. Where soil conditions are suitable, use perforated pipe or gravel ❑ ❑ ® No perforated pipe or gravel filtration pits filtration pits for low flow infiltration. are used. Maximize the permeable area by constructing walkways, trails, patios, N overflow parking, alleys, driveways, low -traffic streets, and other low - Minimize traffic areas with open jointed paving materials or permeable surfaces ® ❑ ❑ Directly such as pervious concrete, porous asphalt, unit pavers, and granular j Connected materials. Impervious Use one or more of the following: Area Rural swale system: street sheet flows to landscaped swale or gravel shoulder, curbs used at street corners, and culverts used under ❑ ❑ ® No curb or streets used for this project. (See WQMP driveways and street crossings. A Section 3.5.1.4 ) Urban curb/swale system: street slopes to curb; periodic swale inlets ❑ El® No curb or streets used for this project. ti Ln drain to landscaped swale or biofilter. Dual drainage system: first flush captured in street catch basins and discharged to adjacent vegetated swale or gravel shoulder; high flows ® ❑ ❑ connect directly to MS4s. Almost half of the drainage area will be draining to existing curb and gutter that Other comparable and equally effective Site Design BMP concept(s) flows towards an existing catch basin and as approved by the local land use authority (Note: Additional narrative ® ❑ ❑ eventually ended up to an existing Dry required to describe BMP and how it addresses site design concept). Well. The other half drains northerly and southerly towards an existing lower Golf Tees and/or existing lake. Use one or more of the following for design of driveways and private residential parking areas: November 2017 1-14 Design Technique Concept 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Portion of Parcel 1, PM 37207) Included Brief Reason for Each BMP Specific BMP Yes I No N/A Indicated as No or N/A driveways with shared access, flared (single lane at street), or tries (Davin! only under the tires). INo temporary or guest parking on ncovered temporary or guest parking on residential lots paved with a ® residential lots. Temporary parking areas rmeable surface, or designed to drain into landscaping. for this project are paved with compacted Class II base -consider as partly pervious. November 2017 1-15 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Portion of Parcel 1, PM 37207) Table 3. Site Design BMP Concepts (continued) Included Brief Reason for Each BMP Indicated as No or N/A Design Technique Specific BMP Yes No N/A Concept Almost half of the drainage area will be draining to existing curb and gutter that Other comparable and equally effective Site Design BMP concept(s) flows towards an existing catch basin and as approved by the local land use authority (Note: Additional narrative ® ❑ ❑ eventually ended up to an existing Dry N Minimize required to describe BMP and how it addresses site design concept). Well. The other half drains northerly and Directly southerly towards an existing lower Golf UConnected Tees and/or existing lake. Impervious .. Area Use one or more of the following for design of parking areas: 0.1 0 .ao �.. (See WQMP Where landscaping is proposed in parking areas incorporate parking p� g P P p g rP P g ® El El Section area landscaping into the drainage design. m 3.5.1.4) Overflow parking (parking stalls provided in excess of the Permittee's minimum parking requirements) may be constructed with permeable ® ❑ ❑ avement. Other comparable and equally effective Site Design BMP (or BMPs) Temporary parking areas for this project as approved by the local land use authority (Note: Additional narrative ® ❑ ❑ are paved with compacted Class II base - required describing BMP and how it addresses site design concept). consider as partly pervious. November 2017 1-16 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Project Site Design BMP Concepts: Most of the site will sheet flow northwesterly and northerly towards existing low-lying points along the golf course where it percolates, evapotranspires, and infiltrates within existing infiltration trench. The other portion will drain easterly towards existing curb in the street, along Ahmanson Lane, then collected by existing catch basin, southerly of the project and eventually drain into existing Dry Well where it percolates and infiltrates. This project will retain the 100% 100-year "pre -developed" and "post -developed" conditions. Hence, it satisfies the local ordinance requirement for 100% on -site retention for the 100-year, 24 hour storm event. Alternative Proiect Site Design BMP Concepts: N/A November 2017 1-17 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Table 4. LID/Site Design BMPs Meeting the LID/Site Design Measurable Goal (1) (2) (3) (4) (5) (6) (7) DRAINAGE LID/SITE DESIGN BMP POTENTIAL POLLUTANTS POTENTIAL EFFECTIVENESS BMP MEETS TOTAL SUB -AREA TYPE* OF CONCERN WITHIN POLLUTANTS OF LID/SITE WHICH AREA ID OR NO. DRAINAGE SUB -AREA WITHIN SUB- DESIGN BMP AT DESIGN WITHIN AREA CAUSING ADDRESSING CRITERIA? DRAINAGE RECEIVING IDENTIFIED SUB -AREA WATER POTENTIAL IMPAIRMENTS POLLUTANTS (See Table 2) (Refer to Table 1) (Refer to Table 1) (U, L, M, H/M, H; see Table 2 (Nearest 0.1 acre) Qaas VBIdenntify Oil & Grease, Trash & Debris, Al SC-31, 34, 41, 43, 70, 73 Sediment/Turbidity, Toxic Organic BacteriaNirus/Pathoge H Q 2.2 Compounds, Nutrients, Heavy ns Metals, BacteriaNirus/Pathogens Oil & Grease, Trash & Debris, A2 SC-10, 11, 20, 21, 30, 31, 34, 41, Sediment/Turbidity, Toxic Organic BacteriaNirus/Pathoge H 43, 60, 61, 70, 73, 75, 76 Compounds, Nutrients, Heavy ns Q 0'8 Metals, BacteriaNirus/Pathogens TOTAL PROJECT AREA TREATED WITH LID/SITE DESIGN BMPs (NEAREST 0.1 ACRE) 3.0 *(NOTE: Sections V.1.A and V.1.13 do not need to be completed since flow is retained onsite) November 2017 1-18 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) V.1.13 TREATMENT CONTROL BMPs* Conventional Treatment Control BMPs shall be implemented to address the project's Pollutants of Concern as required in WQMP Section 3.5.1 where, and to the extent that, Section V. LA has demonstrated that it is infeasible to meet these requirements through implementation of LID/Site Design BMPs. ® The LID/Site Design BMPs described in Section V.LA of this project -specific WQMP completely address the 'Treatment Control BMP requirement' for the entire project site (and where applicable, entire existing site) as required in Section 3.5.1.1 of the WQMP Guidance document. Supporting documentation for the sizing of these LID/Site Design BMPs is included in Appendix F. *Section V.1.13 does not need to be completed since flow is retained onsite. ❑ The LID/Site Design BMPs described in Section V. LA of this project -specific WQMP do NOT completely address the 'Treatment Control BMP requirement' for the entire project site (or where applicable, entire existing site) as required in Section 3.5.1.1 of the WQMP. *Section V.1.B does not need to be completed since flow is retained onsite. November 2017 1-19 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Table 5: Treatment Control BMP Summary (1) (2) (3) (4) (5) (6) (7) DRAINAGE TREATMENT POTENTIAL POTENTIAL EFFECTIVENESS OF BMP MEETS TOTAL SUB -AREA CONTROL BMP POLLUTANTS OF POLLUTANTS TREATMENT WHICH AREA ID OR NO. TYPE* CONCERN WITHIN WITHIN SUB -AREA CONTROL BMP AT DESIGN WITHIN DRAINAGE SUB -AREA CAUSING ADDRESSING CRITERIA? DRAINAGE RECEIVING IDENTIFIED SUB -AREA WATER POTENTIAL IMPAIRMENTS POLLUTANTS (See Table 2) (Refer to Table 1) (Refer to Table 1) (U, L, M, HIM, H; see Table 2) (Identify as VBMe OR QBMP) (Nearest 0.1 acre) TC-10 Oil & Grease, Trash & Debris, Sediment/Turbidity, Toxic N/A Al (GOLF COURSE LOW Organic Compounds, Nutrients, (ALL RUNOFF H Q 2.2 LYING AREAS) Heavy Metals, Bacteria/Virus/Pathogens RETAINED ONSITE) Oil & Grease, Trash & Debris, EXISTING Sediment/Turbidity, Toxic N/A A2 DRY WELL Organic Compounds, Nutrients, Heavy Metals, (ALL RUNOFF RETAINED ONSITE) H Q 0.8 Bacteria/Virus/Pathogens TOTAL PROJECT AREA TREATED WITH TREATMENT CONTROL BMPs (NEAREST 0.1 ACRE) 3.0 November 2017 1-20 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) VA.0 MEASURABLE GOAL SUMMARY This section documents the extent to which this project has met the measurable goal described in WQMP Section 3.5.1.1 of addressing 100% of the project's'Treatment Control BMP requirement' with LID/Site Design BMPs. Projects required to retain Urban Runoff onsite in conformance with local ordinance are considered to have met the measurable goal; for these instances, '100%' is entered into Column 3 of the Table. Table 6: Measurable Goal Summary (1) (2) (3) Total Area Treated with Total Area Treated with LID/Site Design BMPs Treatment Control BMPs % of Treatment Control BMP Requirement addressed with (Last row of Table 4) (Last row of Table 5) LID/Site Design BMPs 3.0 AC N/A 100% November 2018 1-21 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) V.2 SOURCE CONTROL BMPs This section identifies and describes the Source Control BMPs applicable and implemented on this proj ect. Table 7. Source Control BMPs BMP Name Check One If not applicable, state brief reason Included Applicable Non -Structural Source Control BMPs Education for Property Owners, Operators, Tenants, Occupants, or Employees ® ❑ Activity Restrictions ® ❑ Irrigation System and Landscape Maintenance ® ❑ Common Area Litter Control ® ❑ Street Sweeping Private Streets and Parking Lots ® ❑ Drainage Facility Inspection and Maintenance ❑ ® Site sheets flows to existing low lying golf course and existing Dry Well Structural Source Control BMPs Storm Drain Inlet Stenciling and Signage ❑ ® No storm drains on site plan Landscape and Irrigation System Design ® ❑ Protect Slopes and Channels ® ❑ Provide Community Car Wash Racks ❑ ® No car wash racks Properly Design*: Fueling Areas ❑ ® No Fueling Areas Air/Water Supply Area Drainage ❑ ❑ No Air/Water Suppy Area Drainage area Trash Storage Areas ❑ ❑ Loading Docks ❑ ® No permanent Loading Docks Maintenance Bays ❑ ® No permanent Maintenance Bays Vehicle and Equipment Wash Areas ® ❑ Outdoor Material Storage Areas ® ❑ Outdoor Work Areas or Processing Areas ® ❑ Provide Wash Water Controls for Food Preparation Areas ® ❑ *Details demonstrating proper design must be included in Appendix F. November 2018 1-22 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) See attached Source Control BMP's for Implementation. Non -Structural Source Control BMPs: • Education for Property Owners, Operators, Tenants, Occupants, or Employees: Educational brochures and a copy of the Water Quality Management Plan will be supplied and stored on site. • Activity Restrictions: As dictated by Property owners. In addition, Littering shall be prohibited. Blowing, sweeping or hosing debris into streets will not be permitted. • Irrigation System and Landscape Maintenance: 24-hour onsite maintenance staff will provide ongoing irrigation system inspection and maintenance to ensure that timers and smart controllers are working as desired. (SD-10, and SD-11, refer to Appendix C regarding maintenance and inspection requirements.) • Common Area Litter Control: 24-hour onsite maintenance staff will provide ongoing inspection of common areas to ensure that litter and trash are not excessive in common areas. • Street Sweeping Private Streets and Parking Lots: 24-hour onsite maintenance staff will provide maintenance for streets and parking lots. Parking lots will be cleaned as needed, including prior to the start of the rainy season (Oct. Is) Structural Source Control BMPs: • Slope and Channel Protection: 24-hour onsite maintenance staff will stabilize disturbed slopes as quickly as possible, control and treat flows in landscaping and or/ other controls prior to reaching existing natural drainage systems, maintain native and drought tolerant vegetation of slopes, convey runoff safely from tops of slopes and stabilize temporary and permanent channel crossings as quickly as possible, and ensure that increases in run-off velocity and frequency caused by the project do not erode the channel or slope. (SD-13, refer to Appendix C regarding maintenance and inspection requirements.) • Landscape and Irrigation System Design: Landscape and Irrigation shall be designed to meet the local drought tolerant requirements thus reducing overspray and unnecessary nuisance flows. (SD-10, and SD-12, refer to Appendix C regarding maintenance and inspection requirements.) November 2018 1-23 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Properly Design: • Trash Storage Areas: The integrity of structural elements that are subject to damage (ie., screens, covers, and signs) will be maintained by the 24-hour onsite maintenance staff. Roofs, awnings, attached lids will be provided on all trash containers to minimize direct precipitation into containers. Use lined bins or dumpster to prevent leaking of liquid waste. Pave trash storage area with impervious surface to mitigate spills. Post signs on all dumpsters informing users that hazardous materials are not to be disposed of therein. Trash enclosures are elevated to prevent storm water runoff from entering. (SD-32, refer to Appendix C regarding maintenance and inspection requirements.) • Vehicle Washing Areas: 24-hour onsite maintenance staff will keep in a clean and orderly condition through a regular program of sweeping, litter control and immediate cleanup of spills and broken containers. Keep covered, in self-contained area such as service yards, be equipped with a clarifier or other pretreatment facility and have a proper connection to sanitary sewer. (SD-33, refer to Appendix C regarding maintenance and inspection requirements.) • Outdoor Material Storage Areas: 24-hour onsite maintenance staff will keep in a clean and orderly condition through a regular program of sweeping, litter control and immediate cleanup of spills and broken containers. Keep covered, elevated and use an array of BMP wastewater treatment tools such as but not limited to the following: 1) Paved storage area, 2) slope to dead-end sump to contain spills and direct runoff, 3) storage area should have a roof or awning, etc. Stormwater and non -storm water will accumulate in containment area and sumps with impervious surfaces. Contaminated water must be disposed of in accordance with applicable laws and cannot be discharged directly to the storm drain or sanitary sewer system without the appropriate permits. (SD-34, refer to Appendix C regarding maintenance and inspection requirements.) • Outdoor Work Areas: 24-hour onsite maintenance staff will keep in a clean and orderly condition through a regular program of sweeping, litter control and immediate cleanup of spills and broken containers. Keep covered, elevated and use an array of BMP wastewater treatment tools before discharging to sanitary sewer. (SD-35, refer to Appendix C regarding maintenance and inspection requirements.) • Wash Water Controls for Food Preparation Areas: At a minimum, the initial and ongoing training of employees regarding BMPs related to wastewater discharge requirements and pollution prevention. In addition, practicing pollution prevention and good housekeeping such as but not limited to the following: 1) Using dry cleaning methods instead of water when applicable. 2) Cleaning equipment (floor mats, grease filters, grills, garbage cans, etc.) indoors or in a covered outdoor wash area or in an area that will contain wash water. 3) Recycling and/or properly disposing of grease and oil. Lastly, signs that instruct staff, or individuals with access to kitchen area on proper BMPs related to wastewater discharge, and pollution prevention shall be conspicuously posted in the kitchen area, particularly near sinks and grills. Appendix D includes copies of the educational materials (described in Section 3.5.2.1 of the WQMP Guidance document) that will be used in implementing this project -specific WQMP. November 2018 1-24 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) V.3 EQUIVALENT TREATMENT CONTROL BMP ALTERNATIVES N/A VA REGIONALLY -BASED BMPS N/A November 2018 1-26 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) VI. Operation and Maintenance Responsibility for BMPs Appendix G of this project -specific WQMP includes copies of Covenant and Agreements, BMP Maintenance Agreement and/or other mechanisms used to ensure the ongoing operation, maintenance, funding, transfer and implementation of the project -specific WQMP requirements. Irrigation System and Landscape: O and M Activities Schedule and Frequency 1. Inspect and repair broken sprinklers. Inspect weekly and replace immediately 2. Repair broken water lines. Inspect daily and repair immediately. 3. Inspect irrigated areas for signs of erosion and/ or discharge Inspect weekly repair source of erosion or discharge immediately. 4. Street Sweeping Private Streets and Parking Lots: O and M Activities Schedule and Frequency 1. Inspect Storage Area for tracked sediment or Inspect monthly. Sweeping operations should blow sand. Visible sediment tracking should occur as needed. be swept immediately. 2. Adjust brooms frequently; maximize As needed. efficiency of sweeping efforts Protect Slopes and Channels O and M Activities Schedule and Frequency 3. Inspect slopes Inspect monthly to ensure that slopes and vegetation isn't disturbed, if they are repair immediately. Trash Storage Areas: O and M Activities Schedule and Frequency 4. Inspect Trash Storage Area. Inspect daily. Insure that the trash receptacles are emptied on a weekly basis. Recyclables should be separated from disposable trash. November 2018 1-27 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Vehicle and Equipment Wash Areas: O and M Activities Schedule and Frequency 5. Inspect Vehicle and Equipment Wash Areas Inspect weekly to ensure no storm water run-on to ensure proper drainage. into the Vehicle and Equipment Wash Areas is occurring. Outdoor Material Storage Areas: O and M Activities Schedule and Frequency 6. Inspect Outdoor Material Storage areas daily. Inspect weekly to ensure no storm water run-on into the Outdoor Material Storage Area is occurring. Check to make sure that all fluids are disposed of properly and spills are cleaned with absorbent materials. Outdoor Work or Processing Areas: O and M Activities Schedule and Frequency 7. Inspect Outdoor Work or Processing areas Inspect weekly to ensure no storm water run-on daily. into the Outdoor Work or Processing Area is occurring. Check to make sure that all fluids are disposed of properly and spills are cleaned with absorbent materials. Responsible Party: SilverRock Development Company, LLC 3551 Fortuna Ranch Road Encinitas, CA 92024 (760)777-7045 Contact: Robert S. Green, Jr. Note: Sediment, other pollutants, and all other waste shall be properly disposed of in a licensed landfill or by another appropriate disposal method in accordance with local, state, and federal regulations. The owner (who usually hires a maintenance company) will be the responsible party for all O&M activities, including inspections and record keeping for a minimum of 50 years. This maintenance company has not been appointed, nor will it be appointed during the entitlement phase. November 2018 1-28 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) VII. Funding The Property title holder shall carry primary responsibility for the initial funding of installations, design and implementation of site specific BMP's. Ongoing inspections, routine maintenance, and some instances of reactionary maintenance shall be funded by the property owner, in such that he will make an agreement with contractors, tenants, or other parties in direct access and knowledge of the property to pay for any and all aspects of the necessary maintenance and inspections. Continued funding for ongoing inspections and maintenance shall be passed to any and all future title holders and awareness must be made of this obligation in conjunction with the title. In addition, any future property owners, managers, tenants, or contractors must be made aware of the sites structural BMP's and have access to their associated educational materials that are to be kept on site, within the site's respective building as well as held by the property owner, and title company or others who may possess the title or deed to the property. Any amended versions of the funding declaration may be submitted to all applicable parties in the future, should such an action be warranted. All changes must be submitted for review by the SilverRock Development Company, LLC, as per their standards and requirements for altering this document. It is anticipated that the Temporary Clubhouse facility including parking areas will be utilized for a period of two to three years. Appendix G of this project -specific WQMP also includes copies of Covenants and Agreements, BMP Maintenance Agreement and/or other mechanisms used to ensure the ongoing operation, maintenance, funding, transfer and implementation of the project -specific WQMP requirements. Property Owner: SilverRock Development Company, LLC 3551 Fortuna Ranch Road Encinitas, CA 92024 Telephone: 760-634-6543 Contact Person: Robert S. Green, Jr. November 2018 1-29 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Appendix A Conditions of Approval City Council Resolution No. 2017-056 Dated: 11 /07/2017 ta Qa�ttcv — GEM of the DESERT — November 20, 2017 Mr. John Gamblin The Robert Green Company 3551 Fortuna Ranch Rd Encinitas, CA 92024 SUBJECT: SITE DEVELOPMENT PERMIT 2017-0013 — SilverRock Temporary Clubhouse Dear Mr. Gamblin: The La Quinta City Council at its meeting of November 7, 2017, approved Site Development Permit 2017-0013 subject to the attached Conditions of Approval. The decision by the City Council on the development review action is final. If you have any questions, please contact me at (760) 777-7062. Sincerely, GABRIEL PEREZ Planning Manager 78-495 Calle Tampico La Quinta, CA 92253 760.777.7000 RESOLUTION 2017 — 056 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LA QUINTA, CALIFORNIA, APPROVING SITE DEVELOPMENT PERMIT 2017-0013 SITE, ARCHITECTURAL, AND LANDSCAPING PLANS FOR TEMPORARY GOLF COURSE CLUBHOUSE WITHIN PLANNING AREA 10A OF THE SILVERROCK SPECIFIC PLAN CASE NUMBER: SITE DEVELOPMENT PERMIT 2017-0013 (SDP2017-0013) APPLICANT: SILVERROCK DEVELOPMENT COMPANY, LLC WHEREAS, the Planning Commission of the City of La Quinta, California did, on the 10th day of October 10, 2017, hold a duly noticed Public Hearing to consider a request by SilverRock Development Company, LLC, for approval of a temporary golf course clubhouse generally located on the southwest corner of Jefferson Street and Avenue 52, more particularly described as: APN: 777-490-010 WHEREAS, the Design and Development Department published a public hearing notice in The Desert Sun newspaper on September 29, 2017 for said Planning Commission Public Hearing as prescribed by the La Quinta Municipal Code (LQMC). Public hearing notices were also mailed to all property owners within 500 feet of the site; and, WHEREAS, the City Council of the City of La Quinta, California did, on the 7th day of November, 2017, consider SDP2017-0013. WHEREAS, at said meeting, upon hearing and considering all testimony and arguments, if any, of all interested persons desiring to be heard, said City Council did make the following mandatory findings pursuant to Section 9.210.010 of the Municipal Code to justify approval of said SDP: 1. Consistency with General Plan and SilverRock Specific Plan The land use is consistent with the General Plan land use designation of Tourist Commercial. The proposed project is also consistent with the SilverRock Specific Plan, and implements the goals, policies and development standards of the Specific Plan. 2. Consistency with Zoning Code The proposed development, as conditioned, is consistent with the development standards of the City's Zoning Code and/or SilverRock Specific Resolution No. 2017-056 Site Development Permit 2017-0013 Adopted: November 7, 2017 Page 2 of 3 Plan, as applicable. Relocatable buildings are listed as permitted temporary uses with approval of a Site Development Permit. The SDP has been conditioned to ensure compliance with the zoning standards and other supplemental standards as established in Title 9 of the LQMC. 3. Compliance with California Environmental Quality Act (CEQA1 The Design and Development Department has determined that this project is consistent with Environmental Assessment 2014-1003 and no further environmental review is required. The SilverRock Specific Plan includes provisions for relocatable buildings for golf course uses and was analyzed as part of Environmental Assessment 2014-1003. 4. Architectural Design The architectural design of the project is consistent with the design of the existing relocatable office building and cart barns for the golf course clubhouse. The architecture is consistent with temporary trailer buildings and will facilitate construction of the approved permanent clubhouse. 5. Site Design The site design of the project, including, but not limited to, project entries, interior circulation, pedestrian and bicycle access, pedestrian amenities, screening of equipment and trash enclosures, and exterior lighting, are consistent with the SilverRock Specific Plan and with the quality of design prevalent in the city. 6. Landscape Design Project landscaping, including, but not limited to, the location type, size, color, texture and coverage of plant materials, has been designed so as to provide visual relief, complement buildings, and screen undesirable views. NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of La Quinta, California, as follows: SECTION 1. That the above recitations are true and constitute the findings of the City Council in this case. SECTION 2. That the City Council finds the above project to be consistent with Environmental Assessment 2014-1003 and no further environmental review is required. Resolution No. 2017-056 Site Development Permit 2011-0013 Adopted: November 7, 2017 Page 3 of 3 SECTION 3. That the City Council does hereby approve Site Development Permit 2017- 0013, for the reasons set forth in this Resolution and subject to the attached Conditions of Approval and "Exhibit A". PASSED, APPROVED, and ADOPTED at a regular meeting of the City of La Quinta City Council, held on this the 7th day of November, 2017, by the following vote: AYES: Council Members Fitzpatrick, Pena, Radi, Sanchez, Mayor Evans NOES: None ABSENT: None ABSTAIN: None LINDA EVANS, Mayor City of La Quinta, California ATTEST: )t SUSAN MAYSELS, CitJ Clerk City of La Quinta, California (CITY SEAL) APPROVED AS TO FORM: WILLIAM H. IHRKE, City Attorney City of La Quinta, California CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLC) ADOPTED: November 7, 2017 Page 1 of 10 GENERAL 1. The applicant agrees to defend, indemnify and hold harmless the City of La Quinta ("City"), its agents, officers and employees from any claim, action or proceeding to attack, set aside, void, or annul the approval of this Site Development Permit. The City shall have sole discretion in selecting its defense counsel. The City shall promptly notify the applicant of any claim, action or proceeding and shall cooperate fully in the defense. 2. The Site Development Permit shall expire November 7, 2019 and shall become null and void in accordance with La Quinta Municipal Code Section 9.200.080, unless a building permit has been issued. A time extension may be requested per LQMC Section 9.200.080. 3. Prior to the issuance of any grading, construction, or building permit by the City, the applicant shall obtain any necessary clearances and/or permits from the following agencies, if required: • Riverside County Fire Marshal • La Quinta Public Works Development Division (Grading Permit, Green Sheet (Public Works Clearance) for Building Permits, Water Quality Management Plan(WQMP) Exemption Form - Whitewater River Region, Improvement Permit) • Design & Development Department • Riverside Co. Environmental Health Department • Desert Sands Unified School District • Coachella Valley Water District (CVWD) • Imperial Irrigation District (IID) • California Water Quality Control Board (CWQCB) • State Water Resources Control Board • SunLine Transit Agency • SCAQMD Coachella Valley The applicant is responsible for all requirements of the permits and/or clearances from the above listed agencies. When these requirements include CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLC) ADOPTED: November 7, 2017 Page 2 of 10 approval of improvement plans, the applicant shall furnish proof of such approvals when submitting those improvements plans for City approval. 4. For construction activities including clearing, grading or excavation of land that disturbs one (1) acre or more of land, or that disturbs less than one (1) acre of land, but which is a part of a construction project that encompasses more than one (1) acre of land, coverage under the State of California Construction General Permit must be obtained by the applicant; who then shall submit a copy of the Regional Water Quality Control Board's ("RWQCB") acknowledgment of the applicant's Notice of Intent ("NOI") and Waste Discharger Identification (WDID) number to the City prior to the issuance of a grading or building permit. 5. Developer shall reimburse the City, within thirty (30) days of presentment of the invoice, all costs and actual attorney's fees incurred by the City Attorney to review, negotiate and/or modify any documents or instruments required by these conditions, if Developer requests that the City modify or revise any documents or instruments prepared initially by the City to effect these conditions. This obligation shall be paid in the time noted above without deduction or offset and Developer's failure to make such payment shall be a material breach of the Conditions of Approval. 6. Developer shall reimburse the City, within thirty (30) days of presentment of the invoice, all costs and actual consultant's fees incurred by the City for engineering and/or surveying consultants to review and/or modify any documents or instruments required by this project. This obligation shall be paid in the time noted above without deduction or offset and Developer's failure to make such payment shall be a material breach of the Conditions of Approval. PROPERTY RIGHTS 7. Prior to issuance of any permit(s), the applicant shall acquire or confer property rights necessary for construction and proper functioning of the proposed development not limited to access rights over proposed and/or existing parking lot and driveway that access public streets and open space/drainage facilities. STREET AND TRAFFI_C IMPROVEMENTS 8. The applicant shall construct the following street improvements to conform with the General Plan and provisions of LQMC Sections 13.24.060 (Street CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLC) ADOPTED: November 7, 2017 Page 3 of 10 Improvements), 13.24.070 (Street Design - Generally) & 13.24.100 (Access For Individual Properties and Development) for public streets. A. OFF -SITE STREETS 1) Install the guide sign and install a dedicated right turn lane into the access driveway on Avenue 52 per the Urban Crossroads report dated September 6, 2017 and as approved by the City Engineer. 2) Widen the access driveway on Avenue 52 to a minimum width of 30 feet and adjust the existing perimeter wall as needed to widen the access driveway. PARKING LOTS and ACCESS POINTS 9. The design of parking facilities shall conform to LQMC Chapter 9.150 and in particular the following: A. The parking stall and aisle widths and the double hairpin stripe parking stall design shall conform to LQMC Chapter 9.150. B. Cross slopes should be a maximum of 2% where ADA accessibility is required including accessibility routes between buildings. C. Building access points shall be shown on the Precise Grading Plans so that ADA accessibility issues can be evaluated. D. Accessibility routes to public streets and adjacent development shall be shown on the Precise Grading Plan. E. Parking stall lengths shall be according to LQMC Chapter 9.150 and be a minimum of 18 feet in length with a 2-foot overhang for all parking stalls or as approved by the City Engineer. One van accessible handicapped parking stall is required per 6 handicapped parking stalls. F. Drive aisles between parking stalls shall be a minimum of 26 feet with access drive aisles to Public Streets a minimum of 30 feet or as approved by the City Engineer. 14. The applicant shall design street pavement sections using CalTrans' design CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLC) ADOPTED: November 7, 2017 Page 4 of 10 procedure for 20-year life pavement, and the site -specific data for soil strength and anticipated traffic loading (including construction traffic) for 120 parking spaces. Minimum structural sections shall be as follows: Parking Lot & Aisles (Low Traffic) 3.0" a.c./4.5" c.a.b. The remaining 62 overflow parking spaces may be improved with compacted Class 2 aggregate base. 15. The applicant shall submit current mix designs (less than two years old at the time of construction) for base, asphalt concrete and Portland cement concrete. The submittal shall include test results for all specimens used in the mix design procedure. For mix designs over six months old, the submittal shall include recent (less than six months old at the time of construction) aggregate gradation test results confirming that design gradations can be achieved in current production. The applicant shall not schedule construction operations until mix designs are approved. 16. Improvements shall include appurtenances such as traffic control signs, markings and other devices, raised medians if required, street name signs and sidewalks. 17. Improvements shall be designed and constructed in accordance with City adopted standards, supplemental drawings and specifications, or as approved by the City Engineer. Improvement plans for streets, access gates and parking areas shall be stamped and signed by qualified engineers. IMPROVEMENT PLANS As used throughout these Conditions of Approval, professional titles such as "engineer," "surveyor," and "architect," refers to persons currently certified or licensed to practice their respective professions in the State of California. 18. Improvement plans shall be prepared by or under the direct supervision of qualified engineers and/or architects, as appropriate, and shall comply with the provisions of LQMC Section 13.24.040 (Improvement Plans). 19. The following improvement plans shall be prepared and submitted for review and approval by the Design and Development Department. A separate set of CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLC) ADOPTED: November 7, 2017 Page 5 of 10 plans for each line item specified below shall be prepared. The plans shall utilize the minimum scale specified, unless otherwise authorized by the City Engineer in writing. Plans may be prepared at a larger scale if additional detail or plan clarity is desired. Note, the applicant may be required to prepare other improvement plans not listed here pursuant to improvements required by other agencies and utility purveyors. A. Precise Grading Plan B. Signing & Striping Plan C. WQMP 1" = 20' Horizontal 1" = 40' Horizontal (Plan submitted in Report Form) Other engineered improvement plans prepared for City approval that are not listed above shall be prepared in formats approved by the City Engineer prior to commencing plan preparation. "On -Site Commercial Precise Grading" plan is required to be submitted for approval by the Building Official, Planning Manager and the City Engineer. "On -Site Commercial Precise Grading" plans shall normally include all on -site surface improvements including but not necessarily limited to finish grades for curbs & gutters, building floor elevations, parking lot improvements and ADA requirements. 20. The applicant shall furnish a complete set of the mylars of all approved improvement plans on a storage media acceptable to the City Engineer. 21. Upon completion of construction, and prior to final acceptance of the improvements by the City, the applicant shall furnish the City with reproducible record drawings of all improvement plans which were approved by the City. Each sheet shall be clearly marked "Record Drawing" and shall be stamped and signed by the engineer or surveyor certifying to the accuracy and completeness of the drawings. The applicant shall have all approved mylars previously submitted to the City, revised to reflect the as -built conditions. The applicant shall employ or retain the Engineer of Record (EOR) during the construction phase of the project so that the FOR can make site visits in support of preparing "Record Drawing". However, if subsequent approved revisions have been approved by the City Engineer and reflect said "Record Drawing" conditions, the FOR may submit a letter attesting to said fact to the City Engineer in lieu of CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLC) ADOPTED: November 7, 2017 Page 6 of 10 mylor submittal. GRADI_NG 22. The applicant shall comply with the provisions of LQMC Section 13.24.050 (Grading Improvements). 23. Prior to occupancy of the project site for any construction, or other purposes, the applicant shall obtain a grading permit approved by the City Engineer. 24. To obtain an approved grading permit, the applicant shall submit and obtain approval of all of the following: A. A grading plan prepared by a civil engineer registered in the State of California, B. Green Sheet for Fugitive Dust Control, C. A WQMP prepared by an engineer registered in the State of California. All grading shall conform with the recommendations contained in the Preliminary Soils Report, and shall be certified as being adequate by soils engineer, or engineering geologist registered in the State of California. DRAINAGE 25. Stormwater handling shall conform with the approved hydrology and drainage report for SDP 2016-0001 SilverRock. Nuisance water shall be disposed of in an approved manner. 26. Nuisance water shall be retained on site. Nuisance water shall be disposed of per approved methods contained in Engineering Bulletin No. 06-16 - Hydrology Report with Preliminary Hydraulic Report Criteria for Storm Drain Systems and Engineering Bulletin No. 06-015 - Underground Retention Basin Design Requirements. 27. The applicant shall comply with applicable provisions for post construction runoff per the City's NPDES stormwater discharge permit, LQMC Sections 8.70.010 et seq. (Stormwater Management and Discharge Controls), and CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLC) ADOPTED: November 7, 2017 Page 7 of 10 13.24.170 (Clean Air/Clean Water); Riverside County Ordinance No. 457; and the California Regional Water Quality Control Board - Colorado River Basin (CRWQCB-CRB) Region Board Order No. R7-2013-0011 and the State Water Resources Control Board's Order No. 2012-0006-DWQ. A. For post -construction urban runoff from New Development. and Redevelopments Projects, the applicant shall implement requirements of the NPDES permit for the design, construction and perpetual operation and maintenance of BMPs per the approved Water Quality Management Plan (WQMP) for the project as required by the California Regional Water Quality Control Board - Colorado River Basin (CRWQCB-CRB) Region Board Order No. R7-2013-0011. B. The applicant shall implement the WQMP Design Standards per (CRWQCB-CRB) Region Board Order No. R7-2013-0011 utilizing BMPs approved by the City Engineer. A project specific WQMP shall be provided which incorporates Site Design and Treatment BMPs utilizing first flush infiltration as a preferred method of NPDES Permit Compliance for Whitewater River receiving water, as applicable. C. The developer shall execute and record a Stormwater Management/BMP Facilities Agreement that provides for the perpetual maintenance and operation of stormwater BMPs. UTILITIES 28. The applicant shall comply with the provisions of LQMC Section 13.24.110 (Utilities). 29. The applicant shall obtain the approval of the City Engineer for the location of all utility lines within any right-of-way, and all above -ground utility structures including, but not limited to, traffic signal cabinets, electric vaults, water valves, and telephone stands, to ensure optimum placement for practical and aesthetic purposes. 30. Underground utilities shall be installed prior to overlying hardscape. For installation of utilities in existing improved streets, the applicant shall comply with trench restoration requirements maintained, or required by the City Engineer. CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLC) ADOPTED: November 7, 2017 Page 8 of 10 The applicant shall provide certified reports of all utility trench compaction for approval by the City Engineer. Additionally, grease traps and the maintenance thereof shall be located as to not conflict with access aisles/entrances. CONSTRUCTION 31. The City will conduct final inspections of habitable buildings only when the buildings have parking lot improvements and (if required) sidewalk access to publicly -maintained streets. The improvements shall include required traffic control devices, pavement markings and street name signs. LANDSCAPE AND IRRIGATION 32. The applicant shall comply with LQMC Sections 13.24.130 (Landscaping Setbacks) & 13.24.140 (Landscaping Plans). 33. All new landscape areas shall have landscaping and irrigation improvements in compliance with the City's Water Efficient Landscape regulations contained in LQMC Section 8.13 (Water Efficient Landscape). 34. The applicant shall submit final landscape plans for review, processing and approval to the Design and Development Department, in accordance with the Final Landscape Plan application process. Design and Development Director approval of the final landscape plans is required prior to issuance of the first building permit unless the Director determines extenuating circumstances exist which justify an alternative processing schedule. NOTE: Plans are not approved for construction until signed by the appropriate City official, including the Design and Development Director. Prior to final approval of the installation of landscaping, the Landscape Architect of record shall provide the Design and Development Department a letter stating he/she has personally inspected the installation and that it conforms with the final landscaping plans as approved by the City. CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLQ ADOPTED: November 7, 2017 Page 9 of 10 If staff determines during final landscaping inspection that adjustments are required in order to meet the intent of the Planning Commission's approval, the Design and Development Director shall review and approve any such revisions to the landscape plan. 35. Approved trees from the conceptual landscape plan shall be planted into the ground and irrigated pursuant to the LQMC 8.13 (Water Efficient Landscape). MAINTENANCE 36. The applicant shall comply with the provisions of LQMC Section 13.24.160 (Maintenance). 37. The applicant shall make provisions for the continuous and perpetual maintenance of all private on -site improvements, perimeter landscaping, access drives, sidewalks, and stormwater BMPs. FEES AND DEPOSITS 38. The applicant shall comply with the provisions of LQMC Section 13.24.180 (Fees and Deposits). These fees include all deposits and fees required by the City for plan checking and construction inspection. Deposits and fee amounts shall be those in effect when the applicant makes application for plan check and permits. 39. Permits issued under this approval shall be subject to the provisions of the Development Impact Fee and Transportation Uniform Mitigation Fee programs in effect at the time of issuance of building permit(s). NMI �' 3>rW�►(11 40. On the site plan please indicate proposed location of one fire hydrant providing 1500 gpm for 2 hours. If needed please indicate location of buster pump to provide the required fire flow. include cut sheets for the pump. indicate type of pipe to be used with depth of coverage. Please include the required fire flow. Please be advised a separate ,fire permit with inspections will be needed for the temporary fir service. Separate submittals will be required for any type 1 hood systems for separate fire permits. 41. The applicant shall submit a lighting and photometric plan for the temporary CITY COUNCIL RESOLUTION 2017-056 CONDITIONS OF APPROVAL - FINAL SITE DEVELOPMENT PERMIT 2017-0013 (TEMPORARY GOLF COURSE CLUBHOUSE) SILVERROCK RESORT (SILVERROCK DEVELOPMENT COMPANY, LLC) ADOPTED: November 7, 2017 Page 10 of 10 clubhouse facility and temporary parking lot consistent with the City and Specific Plan outdoor lighting requirements. 42. The temporary golf clubhouse buildings shall be painted with a consistent color program. 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Appendix B Vicinity Map, Receiving Waters Map, Project Location Map, & WQMP Site Plan SilverRock Master Plan, Section 303(d), CVWD Drainage & Stormwater Outlet System Exhibit A, 70 q m\� p J \ 40TH AVE cl) U) 42ND AVE F o � o Bermuda 0 o w CDDunes 9�F. Qcn D R o v~i v' w MILES AVE cn o cn Indian Q �y 111 Wells w z 0 J- c/) Y Indio La Quinta z U Q 7 VE AVE z 50TH w cn O w � C ACHELLA CHANNEL w CD 52ND AVE co z w = U) Q 54TH AVE VICINITY MAP N.T.S. ' I ` .I ♦ r:li-i ll�i-_ .,Q/xf •I-r4`y.'t • t�, Q. ��,�.-•i\ry.P k _f[v ,i _�4^ 'L.I v IF 11> h 7V ui ui '. �,►' , Y • 911 1 w J u J > L 74. . 71 ti �r C Cf _ • •'C ci _j , 1 a : _ c • �••� tY' uj I L CL a- OC ' Q = W aruj_ r of ' OI U •. m � ,� ^ f; �,� (,- y'�'�,' . , �,; L z L L -� uj uc /00 . ' err ✓ r .,J I ~r # r Ate'. .a � ^� l � 1's Of uj • l� L 4 ~ +� `yL�.;r�Sr '�` I ��- "i' f 1. rrj'• LL L U) ;1 • i "y., Y W K ' .._IA, .� IJa - r I ,`' 1• :f° J' 1 • !� ti .R r --- it �' i IT,,.� , A', iL rE iL /Y y•� i 4- ti ,IL OMwI i1,? LLL AMERICAN CA AL r � \ OVERFLOW PARKING ARCEL 17 - M 37207 l INTERNATIONAL 75410 Gerald Ford Drive, Palm Desert, CA 92211 Phone: (760) 346-7481 - MBAKERINTL.COM H N Y O O O Q V � DR o w Indian Wells LEGEND 40TH AVE N 42ND AVE \ a O o Bermuda CD Dunes w z z = � Q — 3 i nl MILES AVE N 2 N w La Quinta Z z 50TH � � 3 N W O z Z w � N z 52NDI w N Indio ELLA CHANNEL AVE I 54TH AVE VICINITY MAP N.T.S. ON -SITE DRAINAGE AREA FLOW PATH 0 CLASS II AGGREGATE BASE PARKING AREA ASPHALT CONCRETE PAVEMENT LOW POINT / WATER FEATURE SC 43 BEST MANAGEMENT PRACTICES (CASQA BMP) NUMBER SC-10 NON-STORMWATER DISCHARGES SC-11 SPILL PREY., CONTROL & CLEANUP — SC-20 VEHICLE & EQUIPMENT FUELING SC-21 VEHICLE & EQUIPMENT CLEANING SC-30 OUTDOOR LOADING/UNLOADING SC-31 OUTDOOR CONTAINER STORAGE \ j SC-34 WASTE HANDLING & DISPOSAL SC-41 BUILDING & GROUNDS MAINTENANCE SC-43 PARKING/STORAGE MAINTENANCE SC-60 HOUSEKEEPING PRACTICES SC-61 SAFER ALTERNATIVE PRODUCTS SC-70 ROAD & STREET MAINTENANCE SC-73 LANDSCAPE MAINTENANCE SC-75 WASTE HANDLING & DISPOSAL SC-76 WATER & SEWER UTILITY MAINT TC-10 INFILTRATION TRENCH (CB) CATCH BASIN (EXISTING) (DW) DRYWELL (EXISTING) I SITE AREAS: DRAINAGE AREAS: I� AI-CLA I PARKING & DIRT = 94,100 SF I (CLASS II BASE PARKING = 33,000 SF) A2-AC PARKING & NAT.DIRT = 36,600 SF w EXIST.AHMANSON HOUSE o (ASPHALT PAVING AREA = 36,000 SF) o I TOTAL IMPERVIOUS AREA = 36,000 SF OR 0.8 ACRE -' TOTAL PERVIOUS AREA = 94,700 SF OR 2.2 ACRES \ TOTAL PROJECT AREA: TOTAL DISTURBED AREAS: / i A1+A2 = 94,100 + 36,600 = 130,700 SF OR 3.0 ACRES w = 130,700 SF OR 3.0 ACRES � 6 I P J Figure 4 100 50 0 100 200 300 (FINAL) WQMP SITE PLAN TEMPORARY CLUB HOUSE (2) SCALE: 1 "=100' (PORTION OF PARCEL 1, PM 37207) PA 2 :' '�h '� ►A► -1f 1•I7�� I PA 10A-2 +i - _', WX}URYH�E,L'PARKING�� ' - ,�q% RESIDENTIAL =PA 1053 PA,4 :fie . , t '+�JRSri SI_D�ENTIAL CONFERENCEuAND �� C ; ► M�I' SHARED SERVICE FACILITY PA 10B-2 TA 5-RESIDEN_T_IAL` ,�•i , , ��, ,� • - ," t LIFESTYLE-HOTEfj44 �e lkjOGOLF CLUBHU�,FCOUR� ESIDE TI�A - - E EL PA 11 �►•, % • PUBLIC PARKS ��`i ;� 1. • ARROYO LUXURY BRANDED��,; ' RESIDENTIAL_V- fDEELOPMEN`Tl� ' _!�' r \ 0 Al IMANL,�l PA 2 ., �► _ _LUXURY HOTEL/SPAPA 2 } # ' . �.�r► ' talk 3 ' �►' �� LUXURY HOTEL' rt PA 1 - �► GOLF COURSE � ' � �.. PA PROMENADE MIXED USE'�Y- VILLAGE AREA I ♦ ♦ ti PROMENADE MIXED. IL•LAGE-AREA_II -V_-• PA 8 _ +r RESORT RESIDENTIAL IfJ �,� �. • :iI VILLAGE s� 1 `,,' a ��,,• i . • • , . PA 10B-5 , - . ,; (j•, , ` RESIDENTIAL ! + PA 10B-1 _ �� _ _ 1�: �� ►; 1 : . • 1 /� •—` GOLF � a - �1, ' ' PA-1OB-6 �� • ri■� PA�10B,4 _ .RESIDENTIAL RESIDEN.TIAL. 1.. Attachment One 2010 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS COLORADO RIVER BASIN REGIONAL WATER QUALITY CONTROL BOARD USEPA APPROVAL DATE: OCTOBER 11, 2011 REGION TYPE WATER BODY CALWATER POLLUTANTS/STRESSOR POTENTIAL ESTIMATE PROPOSED TMDL NAME WATERSHED SOURCES SIZE AFFECTE COMPLETION R Alamo River 72310000 Chlordane Source Unknown 57 Miles 2021 Chlorpyrifos Source Unknown 57 Miles 2019 DDT Source Unknown 57 Miles 2019 (Dichlorodiphenyltrichloroethane) Diazinon Source Unknown 57 Miles 2021 Dieldrin Source Unknown 57 Miles 2019 Endosulfan Source Unknown 57 Miles 2021 Enterococcus Source Unknown 57 Miles 2021 Escherichia coli Source Unknown 57 Miles 2021 Mercury Source Unknown 57 Miles 2021 PCBs (Polychlorinated biphenyls) Source Unknown 57 Miles 2019 Sedimentation/Siltation Agricultural 57 Miles 2002 Return Flow Selenium Out-of-state source 57 Miles 2019 Selenium originates from Upper Basin Portion of Colorado River. Elevated fish tissue levels. For 2006, selenium was moved by USEPA from the being addressed list back to the 303(d) list pending completion and USEPA approval of a TMDL. 1 Attachment One 2010 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS COLORADO RIVER BASIN REGIONAL WATER QUALITY CONTROL BOARD USEPA APPROVAL DATE: OCTOBER 11, 2011 REGION TYPE WATER BODY CALWATER POLLUTANTS/STRESSOR POTENTIAL ESTIMATE PROPOSED TMDL NAME WATERSHED SOURCES SIZE AFFECTE COMPLETION 7 7 IN R Toxaphene Source Unknown 57 Miles 2019 Coachella Valley Storm 71947000 DDT Source Unknown 24 Miles 2021 Water Channel(Dichlorodiphenyltrichloroethane) This listing for DDT only applies to a 2 mile area of the Coachella Valley Storm Water Channel from Lincoln Street to the Salton Sea. Dieldrin Source Unknown 24 Miles 2021 This listing for Dieldrin only applies to a 2 mile area of the Coachella Valley Storm Water Channel from Lincoln Street to the Salton Sea. PCBs (Polychlorinated biphenyls) Source Unknown 24 Miles 2021 This listing for PCBs only applies to a 2 mile area of the Coachella Valley Storm Water Channel from Lincoln Street to the Salton Sea. Pathogens Source Unknown 24 Miles 2010 This listing for pathogens only applies to a 17 mile area of the Coachella Valley Storm Water Channel from Dillon Road to the Salton Sea. Toxaphene Source Unknown 24 Miles 2019 This listing for Toxaphene only applies to a 2mile area of the Coachella Valley Storm Water Channel from Lincoln Street to the Salton Sea. Colorado River (Imperial 72700000 Selenium Reservoir to California - Mexico Border) 2 Source Unknown 11 Miles 2019 Attachment One 2010 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS COLORADO RIVER BASIN REGIONAL WATER QUALITY CONTROL BOARD USEPA APPROVAL DATE: OCTOBER 11, 2011 REGION TYPE WATER BODY CALWATER POLLUTANTS/STRESSORJW POTENTIAL ESTIMAT PROPOSED TMDL NAME WATERSHED SOURCES Iff SIZE AFFECTE pr COMPLETION 7 R Imperial Valley Drains 72310000 Chlordane Source Unknown 1225 Miles 2021 This listing for Chlordane only applies to the Barbara Worth Drain, Peach Drain, Greeson Drain, South Central Drain, and Holtville Main Drain areas of the Imperial Valley drains. DDT Source Unknown 1225 Miles 2019 (Dichlorodiphenyltrichloroethane) The listing for DDT only applies to the Barbara Worth Drain, Peach Drain, and Rice Drain areas of the Imperial Valley drains. Dieldrin Source Unknown 1225 Miles 2019 The listing for dieldrin only applies to the Barbara Worth Drain, and Fig Drain areas of the Imperial Valley drains. Endosulfan Source Unknown 1225 Miles 2019 The listing for Endosulfan only applies to the Peach Drain area of the Imperial Valley drains, from Meloland Road to the outlet into the Alamo River. PCBs (Polychlorinated biphenyls) Source Unknown 1225 Miles 2019 The listing for PCBs only applies to the Central Drain area of the Imperial Valley drains. Sedimentation/Siltation Agricultural 1225 Miles 2005 Return Flow Selenium Agricultural 1225 Miles 2019 Return Flow Selenium originates from Upper Basin Portion of Colorado River. Elevated fish tissue levels. 91 Attachment One 2010 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS COLORADO RIVER BASIN REGIONAL WATER QUALITY CONTROL BOARD USEPA APPROVAL DATE: OCTOBER 11, 2011 REGION TYPE WATER BODY CALWATER POLLUTANTS/STRESSORJW POTENTIAL ESTIMAT PROPOSED TMDL NAME WATERSHED SOURCES Iff SIZE AFFECTE pr COMPLETION Toxaphene Source Unknown 1225 Miles 2019 The listing for Toxaphene only applies to the Barbara Worth Drain, Peach Drain, and Rice Drain of the Imperial Valley drains. 7 R New River 72310000 Chlordane Source Unknown 66 Miles 2019 (Imperial County) Chlorpyrifos Source Unknown 66 Miles 2019 Copper Source Unknown 66 Miles 2019 In the final decision for the 2006 303(d) list, USEPA determined that this pollutant water body combination should be listed on the 303(d) (TMDL required list). This listing was made by USEPA for 2006. DDT Source Unknown 66 Miles 2019 (Dichlorodiphenyltrichloroethane) Diazinon Source Unknown 66 Miles 2019 Dieldrin Source Unknown 66 Miles 2019 Hexachlorobenzene/HCB Source Unknown 66 Miles 2021 Nutrients 66 Miles 2019 • Agricultural Return Flows • Major Municipal Point Source -dry and/or wet weather discharge • Out-of-state source Regional Board proposes to establish TMDL in cooperation with US EPA and Mexico. 11 Attachment One 2010 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS COLORADO RIVER BASIN REGIONAL WATER QUALITY CONTROL BOARD USEPA APPROVAL DATE: OCTOBER 11, 2011 REGION TYPE WATER BODY CALWATER POLLUTANTS/STRESSORJW POTENTIAL ESTIMAT PROPOSED TMDL NAME WATERSHED SOURCES Iff SIZE AFFECTE pr COMPLETION Mercury Source Unknown 66 Miles 2019 Organic Enrichment/Low Source Unknown 66 Miles 2010 Dissolved Oxygen PCBs (Polychlorinated biphenyls) Source Unknown 66 Miles 2019 Pathogens 66 Miles 2002 • Confined Animal Feeding Operations (NPS) • Municipal Point Sources • Out-of-state source • Point Source • Wastewater Sediment Source Unknown 66 Miles 2003 Selenium Source Unknown 66 Miles 2019 Toxaphene Source Unknown 66 Miles 2019 Toxicity Source Unknown 66 Miles 2019 Trash Out-of-state 66 Miles 2007 source Zinc Source Unknown 66 Miles 2021 7 R Palo Verde Outfall Drain 71540000 DDT Source Unknown 19Miles 2019 and Lagoon(Dichlorodiphenyltrichloroethane) 5 Attachment One 2010 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS COLORADO RIVER BASIN REGIONAL WATER QUALITY CONTROL BOARD USEPA APPROVAL DATE: OCTOBER 11, 2011 REGION TYPE WATER BODY CALWATER POLLUTANTS/STRESSORJW POTENTIAL ESTIMAT PROPOSED TMDL NAME WATERSHED SOURCES Iff SIZE AFFECTE pr COMPLETION Pathogens Source Unknown 19Miles This listing was made by USEPA for 2006. Toxaphene Source Unknown 19Miles 2019 2021 7 S Salton Sea 72800000 Arsenic Source Unknown 233340 Acres 2021 Chlorpyrifos Source Unknown 233340 Acres 2021 DDT Source Unknown 233340 Acres 2021 (Dichlorodiphenyltrichloroethane) Enterococcus Source Unknown 233340 Acres 2021 Nutrients 233340 Acres 2019 • Agricultural Return Flows • Major Industrial Point Source • Out-of-state source Salinity 233340 Acres 2019 • Agricultural Return Flows • Out-of-state source • Point Source TMDL development will not be effective in addressing this problem, which will require an engineering solution with federal, local, and state cooperation. Attachment One 2010 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS COLORADO RIVER BASIN REGIONAL WATER QUALITY CONTROL BOARD USEPA APPROVAL DATE: OCTOBER 11, 2011 REGION TYPE WATER BODY CALWATER POLLUTANTS/STRESSOR POTENTIAL ESTIMATE PROPOSED TMDL NAME WATERSHED SOURCES SIZE AFFECTE COMPLETION Selenium Source Unknown 233340 Acres 2019 7 L Wiest Lake 72310000 DDT Source Unknown 42 Acres (Dichlorodiphenyltrichloroethane %I 2021 Attachment One 2010 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS COLORADO RIVER BASIN REGIONAL WATER QUALITY CONTROL BOARD USEPA APPROVAL DATE: OCTOBER 11, 2011 REGIONAL WATER QUALITY CONTROL BOARDS WATER BODY TYPE 1. North Coast 2. San Francisco Bay B = Bays and Harbors C = Coastal Shorelines/Beaches 3. Central Coasts E = Estuaries 4. Los Angeles L = Lakes/Reservoirs S. Central Valley R = Rivers and Streams 6. Lahontan S = Saline Lakes 7. Colorado River Basin T = Wetlands, Tidal 8. Santa Ana W = Wetlands, Freshwater 9. San Diego CALWATER WATERSHED "Calwater Watershed" is the State Water Resources Control Board hydrological subunit area or an even smaller area delineation. GROUP A PESTICIDES OR CHEM A aldrin, dieldrin, chlordane, endrin, heptachlor, heptachlor epoxide, Hexachlorocyclohexane (including lindane), endoslufan, and toxaphene P Lc P& wi-"i "r, ,%mAh-* v I, PA 4v. �46"Q q RN W" ........... ............ MWQ44 wai" t� l ,,Pel kow on tj HII MIA ke, A am .db 11 a p .41 14.0 .02 /� - W, - quai ' __, '�� 1lYf� t4'l.aQ '�•�s+�«gin:. NIFNM(►?a+B1kR11%=il��ti +.,�, r�A `li; ('_. *,eie I.w ""s. vollijams Ill"11111111"N' !I#- '4.�,ti, M. of 4, zat; IT mmdkw I If ' � .�. P 1• "r �. '. * �� j�./I�J'/s�,"�t�j�� /r-' ' i. r!�� i ' F�.�P. �l��w_ •stle+trgM tr Zt, "j r` i1 Am "011d op I / I P, "Ilk 'vz 0 2,000 4,000 6,000 Feet REVISED FEBRUARY 2016 ��44� 1/1..%%i7%*rf+%1 sefl�+ hrw�1 wr L__ al ILI P. e 7 j t-A •fl t 0' to. 100 141 iri 49 IM 4/1 .. 1-*&4;* 'KaA -.43 to sob Nell! b5 'INV I MAk lag, '11 'Lou 11%. % n '9JSA*jo -Gar. L Sr N r. "Rev %of ',%PP. I � 1 r W -'Al S'. 'i-o'i �.v ow? * 1b Now Kic "4', • we - J, 4 fs t#- ZO A. W. 6 41� 'AV_r Mr, w a VIP k9 �. L, I Sir w0k, 401 7*14 j, #1 A , � I- ., V - a Z*-, . ............. als— '040 _C t Aft• 6 n. jp /as AW AW. vi *y- .'Air ow-, jw #* I I _: A.&O of Tt 44 ;,j Zfw, n 1. SP A AV k, 14 40 0 . 0 XA fA AVENUE 52 ♦*N O ♦ S ° '\^P ;7•jP �N6 SON° 3!;O ^F "° ',q"d° \ `///' ♦ '/I 6° im 51 own Wo ri P �r 23 / 1 E s�. ---- 15 6 1fif 'z_-- — r 6�} IL Xv g 66 6P Ap ♦ ' ri J rl A r2PN� � � _ 2D ♦ 36 � .,, JJIIII� � 12 � ' �r ♦ ` � � 7 ' 1 -- 34 5B 00 m MW �- 1 left (o'2A N'*� 'or 00 *4 **,K- moo 00# 4%ft 44* x V ri I-'� N r3P 110 oolll2G r3H �♦ r2B 5 r4P"*� 1 r3B 4B 2H 4 1 #40 ♦ 1 6 i 16) s � � ♦ i ♦ J ! rl S 1 ♦ • v � e � � rl D, � too r -* 48 i f 1 5P �, � � � 13 1 !K-1—L ♦ i � 1 9 1 ♦ - �r ♦ ' 00 r fto LAND USE CATEGORY ROCK OUTCROP GOLF COURSE COMIuERC I AL 1/4 ACRE LOT SINGLE FAMILY RESIDENTIAL 300 150 0 300 600 900 GRAPHIC SCALE FIGURE 4 O I r, 00 N to O INTERNATIONAL 14725 Alton Parkway, Irvine, CA 92618 Phone: (949) 472-3505 - MBAKERINTL.COM LAND USE PLAN SILVERROCK RESORT OS PR OS ■ clgamdfs1::GIS_Work\Plots\Zoning4.pdf gis::GIS_ProjectFiles\Mxd\Zoning4.mxd OS OS PR OS MC FP CP CT LAKE CAHUILLA RL CN Z O co ry w U_ U_ w FRED WARING DR MILES AVE AVENUE 48 RM PR RL oS RL RL Z 0 Q AVENUE 50 OS CN BROWN F1�11 1 I RMH RL MC U) w Of O CN CN CN :7►8I MC Cn Cn U) Z Z ° Z W U)m O Y Q Q Z Q � U > �� AVENUE 50 AVENUE 52 AVENUE 54 City of La Quinta Ofrliciaizo 1 9 Map September, 2007 LEGEND RESIDENTIAL RVL Very Low Density Residential RL Low Density Residential Rc Cove Residential RM Medium Density Residential URMH Medium High Density Residential RH High Density Residential VILLAGE COMMERCIAL vc Village Commercial NONRESIDENTIAL DISTRICTS cR Regional Commercial cc Community Commercial CN Neighborhood Commercial CT Tourist Commercial Industrial - Office Commercial Mc Major Community Facilities ECP Commercial Park SPECIAL PURPOSE DISTRICTS PR Parks and Recreation LLCMMM Golf Course Los]Open Space co FP Floodplain 2 co Lo� Low Density Agriculture/Equestrian o Residential U) of SPECIAL SYMBOLS Q 2 AIRPORT BLV 1111111J Equestrian Overlay X I CCJ — — — - City Limit o --------- City Sphere Planning Area 1 - Planning Area 2 AVENUE 58 * Designations outside City Limits are considered pre -zoning U Of U) W Y J J i o ~ a- AVENUE 60 CR CC RM OS I H AVENUE 62 RM RM CC RM / /1 LJ I AVENUE 64 OS RL cc RM RH AVENUE 66 Zoning Map Case Number (ZC) City Council Approval 2003-1131 April 15, 2003 Ordinance Number 381 2003-110 May 6, 2003 382 2003-111 June 17, 2003 384 2003-112 December 21, 2004 411 2003-114 July 1, 2003 387 2003-115 March 16, 2004 405 2003-116 January 6, 2004 396 2003-117 January 20, 2004 398 2004-120 August 3, 2004 408 2004-122 January 18, 2005 413 2005-124 June 21, 2005 420 2005-125 Novermber 15, 2005 422 2006-129 Aril 3, 2006 2006-009A* 2006-130 November 21, 2006 2006-121 1. Official Zoning Map Adoption * Amendment to Ordinance 305 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Appendix C Refer to Drainage Study provided on a separate cover — Appendix F 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Appendix D Educational Materials CASQA BMP Handbook Source Control BMPs SC-10 Non-Stormwater Discharges SC- 11 Spill Prevention, Control & Cleanup SC-20 Vehicle & Equipment Fueling SC-21 Vehicle & Equipment Cleaning SC-30 Outdoor Loading/Unloading SC-31 Outdoor Container Storage SC-34 Waste Handling & Disposal SC-41 Building & Ground Maintenance SC-43 Parking/Storage Maintenance SC-60 Housekeeping Practices SC-61 Safer Alternative Products SC-70 Road & Street Maintenance SC-73 Landscape Maintenance SC-75 Waste Handling & Disposal SC-76 Water & Sewer Utility Maintenance TC-10 Infiltration Trench r Riverside County StorniNvater Program Members City of Banning; City of Moreno Vallcv (t)j l l �)'?. 311'S i'�; I t 41 1-300. CitN of Beaumont City of Nitirrieta (t);l) 70-hS2,1 i`+il) 304•248) City of Calintc•sa L'it\ of Norco 0001 c)SI1 2 7 •56C7 itv of Canvon Lakc City of Palm Desert l.it� t t .,rh,,lr, l r'it, C.-it5 ofYalm Sprints i7n(`) Q1.829) Coachclla City of Perrin (951) 04 3-n I O l ,r\ -,f Corona CiIN A Rancho Mira} , (`+ r i 1 7 3h•.447 (700) i'4-4iI 1 City of Dcsrrt Hot Springs Cite of Riversidc (7f,O) ; 2,t.t,4 1 1 l) ti 6.5 31 I ! Cit% of Eastvale City of San Jacinto Ito rra M City of Hrnx•t City of Tumccula t ;00 0;1) 404 (,444 t o Cit) of Indian Wells Cite of Wildomir 346-'4Rt (Qilr r 77 7�I City of Indio Coa,11VIla Valle\ N1',ttt•r District Cite of Jurul•a Valle\ i0i I ) 3 3:' (.4(14 Counr� of Rit cr.idc i I,)S1) uii lt�'.ti Cih of La6c Lhinorc y� h74 i 1 _'4 Itircrsidc County Flood Control Distrn, i UiIN of La Quinta (++i I I uii I 'L 17v0) 777-701'' Cite of .Mcnifcc •�'°' 01l Indi,tstrial and Commercial Facilities The Ili\ t I do Comm -t1 tnnw;iter Prtigr.un 11.1• ldcrltit] e,1 ,1 nunlbet of Best N-hilmOt-MvIlt PEMI.C.I (11MI's) hrt 1n,lu1tti:ll ,111d('.0mmercial F;a,_iliric,. Thc•.c B&IP,.,,ntr,11 :ant{ t.•allt:t' stUlill\\•ater pollutants. (r,1tt1 rCathllh 11111 1, um drain -\'stein and ultinimci' our 11+,-:11 \racer huaie' l:il\• arid ( ,luill) t,rjinance� tc'lulrc ktl>Ilic:, C, 110 U.,C the".. H;N11'N It1 111,11CCl 1111r 1t•:Itrr lfuahn'• L11r,11 titir.� .Ittd Ihr (;1,unt\ art rrduirrd tt, reritj implenlent,llilal of thc,e I'Mrs by 1-erltinnin" lCgIllar f:,cilirl• in.4�.•cutln�. Prohibited Discharges Di-,wi mit' Al n,ll—tor111witl•1 dimhl lrgv, I,, the Gr,11'lll drain v,tt-m. It 1 I rohithrred to dvJmr,,x an\ ehcnucal., p;nlltl, dt-brl., \r;Ltt" 01 \\:IaeIVACr Intt-; t}l%.- "litter, street of storm Jr:,in. Outdoor Storage BMPs ln�.tall cr\•crs and secant dry cinita meat :seas for all 11,1_:11t1,1u1 matt:riab anJ It,I�te, •[c1rcJ uurJtx)r� in At-oU tlite\rliltCoullt\ and "I (_:ir), standards. Ali Feel, all tt•m1t(11AIf %%.I.Ie t01113rller> tt,\-t•rcd, a( ;III unu. ,\' ICI I ll%)[ Ill t14C. s"\\rep 0UIL1 lt)r ama. inStr,1J 411 u,in" .1 ht1�c ur prc»Iuc \\a�ht•r. • ,11,\'(' ;ill 1+1.0CCNS t,per.l11011F ini lualn�l \chit l'•,t•.Iulhnitnt 11MIlltertarite in•lde ()I the bullault; ttl 111111 a tt,\•e►ed and 01111,1111CLI area. f� W11,11 e'luipnlent ,Intl ,rhitle< In ,t e,alLIMCd ,illd .,.,\erect Wish 1'.t\' \1'hlLll 1, 611>eJ•lt,(1p 1,r it11111ettt'd It, ,1 iliii-di'r i:cd 1,1 111,a1 11.11k trd, ilia di,thari,cd t„ 1 •anll.ln �rl\'rl ,a ,kt Ihem I„ .l ct+tnmcrtl;ll t,tr ,c;,,ll Shills and Clean Up BMPs • ht t'p (ht• woo: •1tt'.IC.111;1ild ot,lvrl\ ht'llht\'t dcl,m, III 1 tI111C11' I.11hlt+ll. S%%cul- Ill' rhC ;ltc;i. • CIC,I11 Ill,'pill, [till]1CJmICl\ \\'hell 1111", ,,ttm, lism",ill tiem) llp Illollo,k iI'll a? ,il"oll)CIII 11imcll.Ila tit 1Nr(111 1,,11i1\ edbCprtyCIdlp)'.J1,)f 111;1Icy lal, • E Alw•iy, ha\'c :t pill kit ;I\•allablc near'h,miull lo:Jint; at,tl: dtl,lts ;InJ rthuh malrltcrlalwe and luclm-, alc,I. Follow \ otil huSI[1Ctis Fmen_t�nc\I'1,1n, ,Il tile, r� \l•Ilh the Itic , I FIrc [lcpart Item Rept,tl an 1-Itlhil'Itcd .list, harl:c*j a11J 11,111 llupienl.111.111oll 1I M11'� Itt )'Otll I, ILaI fit, dIIIWA Cl ( n)ydiminir as list's( u1t dw hack t,l Ihi, paniphlcl. Repoli h:1_artiuu• i nuen;tl, Gall, it, 951- i�"-5055 tit , all atter hour, It- 051- i (sZ- 2973 or, it :ill e'lliereenc\, 'all the Flrc D p:ntment', Haz Alas Team at QI 1. Plastic Manufacturing Facilities BMPs .AB 25S require, plastic pit duct nlalltlfacturev� t„ MIPS. lull .!� �.ltt' �R irHf4' all,{ t'leall-Ilp prltce'iurc� ttt lln vt lit pl,lsnt Pellets (11tildles) (mill t:nlrrin,c the watem,i%. -1 he rl;lsnc pellets arc rcicaacd hilt' the ell\'11'0111nent during lran�pltrt111g, p;tik,IgIlI:.111d prllteX�ilq and nu"rate ttl N•ertl\\•a\•.ti thrclu:ch the otttrnl ,IJAII-1 S\'Mcnl. AIi 25,q will help l,1.1te.I li,ll and \Vildlik If, an th. hazud"1t pld!-tic 1)„11116 )rl, Training BMPs A. pre•trlht.l k \'I In t.in !nJ ('lulnr\ tirt+Inl„:►trr lhtlit .111CC(l), tldill e111)10yees ill spill 1)10ictlult•< aua plttlllbl( Itltll �IttrI11R'AR'r 1,tharl_'t•, it) tht norm tlrmn Applt.ablc li\IP e-.►tlll'le> tan be 1, mild at +: \t'\t.eabntjtl1,11 Iabt n,kti.t t till. Penn i tting `tt,rnr\1..t.t dl1 J1.1r.(c�- i" ,t I,tic.l With=pr.11ik tatct111C- it)r nldu nmd t.i, hair•, .,It rt _ulafca I•r the ~late 1C',Itet R(•;t1111'1t•1 (,+1111,11 b,',t1,1 IlUt+llr'll all Inthl>111.11 I. ienetal Penult .\ „v\ ,+f tlit, (letter, I Permit ,Ina .Ip1`I1t,firm t,+Irl)s tit . ,:Illa}'It' al. ;•ItII >1„t1u\\.Itr1 Own Ihr A1,It1,Ir1.11 ,iuttk 11111, To rept,rt illeg-al dumping or for nuns inlurmatiun on aunmratcr p,111tltion proTIlliun call: 1-800-501)-2555 or e-nwil u, it: IcnpdcyrAtlud.tlre. Non-Stormwater Discharges SC-10 Protect tilt, hires/ Oil Waste Paint - i-9J VS-C. K Llse Nle Household Waste Treatment Facility Objectives ■ Contain ■ Educate ■ Reduce/Minimize Graphic by: Margie Winter Description Targeted Constituents Non-stormwater discharges are those flows that do not consist Sediment Q entirely of stormwater. For municipalities non-stormwater Nutrients Q discharges present themselves in two situations. One is from Trash Q fixed facilities owned and/or operated by the municipality. The Metals Q other situation is non-stormwater discharges that are discovered Bacteria Q during the normal operation of a field program. Some non- stormwater discharges do not include pollutants and may be Oil and Grease Q discharged to the storm drain. These include uncontaminated Organics Q groundwater and natural springs. There are also some non- Oxygen Demanding Q stormwater discharges that typically do not contain pollutants and may be discharged to the storm drain with conditions. These include car washing, and surface cleaning. However, there are certain non-stormwater discharges that pose environmental concern. These discharges may originate from illegal dumping or from internal floor drains, appliances, industrial processes, sinks, and toilets that are connected to the nearby storm drainage system. These discharges (which may include: process waste waters, cooling waters, wash waters, and sanitary wastewater) can carry substances (such as paint, oil, fuel and other automotive fluids, chemicals and other pollutants) into storm drains. The ultimate goal is to effectively eliminate non- stormwater discharges to the stormwater drainage system through implementation of measures to detect, correct, and enforce against illicit connections and illegal discharges. Approach The municipality must address non-stormwater discharges from its fixed facilities by assessing the types of non-stormwater discharges and implementing BMPs for the discharges . . determined to pose environmental concern. For field programs January 2003 California Stormwater BMP Handbook 1 of it Municipal www.cabmphandbooks.com SC-10 Non-Stormwater Discharges the field staff must be trained to now what to look for regarding non-stormwater discharges and the procedures to follow in investigating the detected discharges. Suggested Protocols Fixed Facility General ■ Post "No Dumping" signs with a phone number for reporting dumping and disposal. Signs should also indicate fines and penalties for illegal dumping. ■ Stencil storm drains, where applicable, to prevent illegal disposal of pollutants. Storm drain inlets should have messages such as "Dump No Waste Drains to Stream" stenciled next to them to warn against ignorant or intentional dumping of pollutants into the storm drainage system. ■ Landscaping and beautification efforts of hot spots might also discourage future dumping, as well as provide open space and increase property values. ■ Lighting or barriers may also be needed to discourage future dumping. Illicit Connections ■ Locate discharges from the fixed facility drainage system to the municipal storm drain system through review of "as -built" piping schematics. ■ Use techniques such as smoke testing, dye testing and television camera inspection (as noted below) to verify physical connections. ■ Isolate problem areas and plug illicit discharge points. Visual Inspection and Inventory ■ Inventory and inspect each discharge point during dry weather. ■ Keep in mind that drainage from a storm event can continue for several days following the end of a storm and groundwater may infiltrate the underground stormwater collection system. Also, non-stormwater discharges are often intermittent and may require periodic inspections. Review Infield Piping ■ Review the "as -built" piping schematic as a way to determine if there are any connections to the stormwater collection system. ■ Inspect the path of floor drains in older buildings. Smoke Testing ■ Smoke testing of wastewater and stormwater collection systems is used to detect connections between the two systems. 2 of 11 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Non-Stormwater Discharges SC-10 ■ During dry weather the stormwater collection system is filled with smoke and then traced to sources. The appearance of smoke at the base of a toilet indicates that there may be a connection between the sanitary and the stormwater system. Dye Testing ■ A dye test can be performed by simply releasing a dye into either your sanitary or process wastewater system and examining the discharge points from the stormwater collection system for discoloration. TV Inspection of Storm Sewer ■ TV Cameras can be employed to visually identify illicit connections to the fixed facility storm drain system. Illegal Dumping ■ Regularly inspect and clean up hot spots and other storm drainage areas where illegal dumping and disposal occurs. ■ Clean up spills on paved surfaces with as little water as possible. Use a rag for small spills, a damp mop for general cleanup, and absorbent material for larger spills. If the spilled material is hazardous, then the used cleanup materials are also hazardous and must be sent to a certified laundry (rags) or disposed of as hazardous waste. ■ Never hose down or bury dry material spills. Sweep up the material and dispose of properly. ■ Use adsorbent materials on small spills rather than hosing down the spill. Remove the adsorbent materials promptly and dispose of properly. ■ For larger spills, a private spill cleanup company or Hazmat team may be necessary. ■ See fact sheet SC-11 Spill Prevention, Control, and Clean Up. Field Program General ■ Develop clear protocols and lines of communication for effectively prohibiting non- stormwater discharges, especially ones that involve more than one jurisdiction and those that are not classified as hazardous, which are often not responded to as effectively as they need to be. ■ Stencil storm drains, where applicable, to prevent illegal disposal of pollutants. Storm drain inlets should have messages such as "Dump No Waste Drains to Stream" stenciled next to them to warn against ignorant or intentional dumping of pollutants into the storm drainage system. ■ See SC-74 Stormwater Drainage System Maintenance for additional information. January 2003 California Stormwater BMP Handbook 3 of it Municipal www.cabmphandbooks.com SC-10 Non-Stormwater Discharges Field Inspection ■ Regularly inspect and clean up hot spots and other storm drainage areas where illegal dumping and disposal occurs. ■ During routine field program maintenance field staff should look for evidence of illegal discharges or illicit connection: - Is there evidence of spills such as paints, discoloring, etc. - Are there any odors associated with the drainage system - Record locations of apparent illegal discharges/illicit connections and notify appropriate investigating agency. ■ If trained, conduct field investigation of non-stormwater discharges to determine whether they pose a threat to water quality. Recommended Complaint Investigation Equipment ■ Field Screening Analysis - pH paper or meter - Commercial stormwater pollutant screening kit that can detect for reactive phosphorus, nitrate nitrogen, ammonium nitrogen, specific conductance, and turbidity - Sample jars - Sample collection pole - A tool to remove access hole covers ■ Laboratory Analysis - Sample cooler - Ice - Sample jars and labels - Chain of custody forms. ■ Documentation - Camera - Notebook - Pens - Notice of Violation forms 4 of 11 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Non-Stormwater Discharges SC-10 Educational materials Reporting ■ A database is useful for defining and tracking the magnitude and location of the problem. ■ Report prohibited non-stormwater discharges observed during the course of normal daily activities so they can be investigated, contained and cleaned up or eliminated. ■ Document that non-stormwater discharges have been eliminated by recording tests performed, methods used, dates of testing, and any onsite drainage points observed. ■ Maintain documentation of illicit connection and illegal dumping incidents, including significant conditionally exempt discharges that are not properly managed. Enforcement ■ Educate the responsible party if identified on the impacts of their actions, explain the stormwater requirements, and provide information regarding Best Management Practices (BMP), as appropriate. Initiate follow-up and/or enforcement procedures. ■ If an illegal discharge is traced to a commercial, residential or industrial source, conduct the following activities or coordinate the following activities with the appropriate agency: - Contact the responsible party to discuss methods of eliminating the non-stormwater discharge, including disposal options, recycling, and possible discharge to the sanitary sewer (if within POTW limits). - Provide information regarding BMPs to the responsible parry, where appropriate. - Begin enforcement procedures, if appropriate. - Continue inspection and follow-up activities until the illicit discharge activity has ceased. ■ If an illegal discharge is traced to a commercial or industrial activity, coordinate information on the discharge with the jurisdiction's commercial and industrial facility inspection program. Training ■ Train technical staff to identify and document illegal dumping incidents. ■ Well -trained employees can reduce human errors that lead to accidental releases or spills. The employee should have the tools and knowledge to immediately begin cleaning up a spill if one should occur. Employees should be familiar with the Spill Prevention Control and Countermeasure Plan. ■ Train employees to identify non-stormwater discharges and report them to the appropriate departments. ■ Train staff who have the authority to conduct surveillance and inspections, and write citations for those caught illegally dumping. January 2003 California Stormwater BMP Handbook 5 of 11 Municipal www.cabmphandbooks.com SC-10 Non-Stormwater Discharges ■ Train municipal staff responsible for surveillance and inspection in the following: - OSHA -required Health and Safety Training (29 CFR 1910.120) plus annual refresher training (as needed). - OSHA Confined Space Entry training (Cal -OSHA Confined Space, Title 8 and federal OSHA 29 CFR 1910.146). - Procedural training (field screening, sampling, smoke/dye testing, TV inspection). ■ Educate the identified responsible party on the impacts of his or her actions. Spill Response and Prevention ■ See SC-11 Spill Prevention Control and Clean Up Other Considerations ■ The elimination of illegal dumping is dependent on the availability, convenience, and cost of alternative means of disposal. The cost of fees for dumping at a proper waste disposal facility are often more than the fine for an illegal dumping offense, thereby discouraging people from complying with the law. The absence of routine or affordable pickup service for trash and recyclables in some communities also encourages illegal dumping. A lack of understanding regarding applicable laws or the inadequacy of existing laws may also contribute to the problem. ■ Municipal codes should include sections prohibiting the discharge of soil, debris, refuse, hazardous wastes, and other pollutants into the storm drain system. ■ Many facilities do not have accurate, up-to-date schematic drawings. ■ Can be difficult to locate illicit connections especially if there is groundwater infiltration. Requirements Costs ■ Eliminating illicit connections can be expensive especially if structural modifications are required such re -plumbing cross connections under an existing slab. ■ Minor cost to train field crews regarding the identification of non-stormwater discharges. The primary cost is for a fully integrated program to identify and eliminate illicit connections and illegal dumping. However, by combining with other municipal programs (i.e. pretreatment program) cost may be lowered. ■ Municipal cost for containment and disposal may be borne by the discharger. Maintenance Not applicable 6 of 11 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Non-Stormwater Discharges SC-10 Supplemental Information Further Detail of the BMP What constitutes a "non-stormwater" discharge? ■ Non-stormwater discharges are discharges not made up entirely of stormwater and include water used directly in the manufacturing process (process wastewater), air conditioning condensate and coolant, non -contact cooling water, cooling equipment condensate, outdoor secondary containment water, vehicle and equipment wash water, landscape irrigation, sink and drinking fountain wastewater, sanitary wastes, or other wastewaters. Permit Requirements Current municipal NPDES permits require municipalities to effectively prohibit non- stormwater discharges unless authorized by a separate NPDES permit or allowed in accordance with the current NPDES permit conditions. Typically the current permits allow certain non-stormwater discharges in the storm drain system as long as the discharges are not significant sources of pollutants. In this context the following non-stormwater discharges are typically allowed: - Diverted stream flows; - Rising found waters; - Uncontaminated ground water infiltration (as defined at 40 CFR 35.2005(20)); - Uncontaminated pumped ground water; - Foundation drains; - Springs; - Water from crawl space pumps; - Footing drains; - Air conditioning condensation; - Flows from riparian habitats and wetlands; - Water line and hydrant flushing; - Landscape irrigation; - Planned and unplanned discharges from potable water sources; - Irrigation water; - Individual residential car washing; and - Lawn watering. January 2003 California Stormwater BMP Handbook 7 of 11 Municipal www.cabmphandbooks.com SC-10 Non-Stormwater Discharges Municipal facilities subject to industrial general permit requirements must include a certification that the stormwater collection system has been tested or evaluated for the presence of non-stormwater discharges. The state's General Industrial Stormwater Permit requires that non-stormwater discharges be eliminated prior to implementation of the facility's SWPPP. Illegal Dumping ■ Establish a system for tracking incidents. The system should be designed to identify the following: - Illegal dumping hot spots - Types and quantities (in some cases) of wastes - Patterns in time of occurrence (time of day/night, month, or year) - Mode of dumping (abandoned containers, "midnight dumping" from moving vehicles, direct dumping of materials, accidents/spills) - Responsible parties Outreach One of the keys to success of reducing or eliminating illegal dumping is increasing the number of people on the street who are aware of the problem and who have the tools to at least identify the incident, if not correct it. There we a number of ways of accomplishing this: ■ Train municipal staff from all departments (public works, utilities, street cleaning, parks and recreation, industrial waste inspection, hazardous waste inspection, sewer maintenance) to recognize and report the incidents. ■ Deputize municipal staff who may come into contact with illegal dumping with the authority to write illegal dumping tickets for offenders caught in the act (see below). ■ Educate the public. As many as 3 out of 4 people do not understand that in most communities the storm drain does not go to the wastewater treatment plant. Unfortunately, with the heavy emphasis in recent years on public education about solid waste management, including recycling and household hazardous waste, the sewer system (both storm and sanitary) has been the likely recipient of cross -media transfers of waste. ■ Provide the public with a mechanism for reporting incidents such as a hot line and/or door hanger (see below). ■ Help areas where incidents occur more frequently set up environmental watch programs (like crime watch programs). ■ Train volunteers to notice and report the presence and suspected source of an observed pollutant to the appropriate public agency. 8 of it California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Non-Stormwater Discharges SC-10 What constitutes a "non-stormwater" discharge? ■ Non-stormwater discharges are discharges not made up entirely of stormwater and include water used directly in the manufacturing process (process wastewater), air conditioning condensate and coolant, non -contact cooling water, cooling equipment condensate, outdoor secondary containment water, vehicle and equipment wash water, landscape irrigation, sink and drinking fountain wastewater, sanitary wastes, or other wastewaters. Permit Requirements ■ Current municipal NPDES permits require municipalities to effectively prohibit non- stormwater discharges unless authorized by a separate NPDES permit or allowed in accordance with the current NPDES permit conditions. Typically the current permits allow certain non-stormwater discharges in the storm drain system as long as the discharges are not significant sources of pollutants. In this context the following non-stormwater discharges are typically allowed: - Diverted stream flows; - Rising found waters; - Uncontaminated ground water infiltration (as defined at 40 CFR 35.2005(20)); - Uncontaminated pumped ground water; - Foundation drains; - Springs; - Water from crawl space pumps; - Footing drains; - Air conditioning condensation; - Flows from riparian habitats and wetlands; - Water line and hydrant flushing; - Landscape irrigation; - Planned and unplanned discharges from potable water sources; - Irrigation water; - Individual residential car washing; and - Lawn watering. Municipal facilities subject to industrial general permit requirements must include a certification that the stormwater collection system has been tested or evaluated for the presence January 2003 California Stormwater BMP Handbook 9 of 11 Municipal www.cabmphandbooks.com SC-10 Non-Stormwater Discharges of non-stormwater discharges. The state's General Industrial Stormwater Permit requires that non-stormwater discharges be eliminated prior to implementation of the facility's SWPPP. Storm Drain Stenciling ■ Stencil storm drain inlets with a message to prohibit illegal dumpings, especially in areas with waste handling facilities. ■ Encourage public reporting of improper waste disposal by a HOTLINE number stenciled onto the storm drain inlet. ■ See Supplemental Information section of this fact sheet for further detail on stenciling program approach. Oil Recycling ■ Contract collection and hauling of used oil to a private licensed used oil hauler/recycler. ■ Comply with all applicable state and federal regulations regarding storage, handling, and transport of petroleum products. ■ Create procedures for collection such as; collection locations and schedule, acceptable containers, and maximum amounts accepted. ■ The California Integrated Waste Management Board has a Recycling Hotline, (800) 553- 2962, that provides information and recycling locations for used oil. Household Hazardous Waste ■ Provide household hazardous waste (HHW) collection facilities. Several types of collection approaches are available including permanent, periodic, or mobile centers, curbside collection, or a combination of these systems. Training ■ Train municipal employees and contractors in proper and consistent methods for waste disposal. ■ Train municipal employees to recognize and report illegal dumping. ■ Train employees and subcontractors in proper hazardous waste management. Spill Response and Prevention • Refer to SC-ii, Spill Prevention, Control & Cleanup ■ Have spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. 10 of it California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Non-Stormwater Discharges SC-10 Other Considerations ■ Federal Regulations (RCRA, SARA, CERCLA) and state regulations exist regarding the disposal of hazardous waste. ■ Municipalities are required to have a used oil recycling element and a HHW element within their integrated waste management plan. ■ Significant liability issues are involved with the collection, handling, and disposal of HHW. Examples The City of Palo Alto has developed a public participation program for reporting dumping violations. When a concerned citizen or public employee encounters evidence of illegal dumping, a door hanger (similar in format to hotel "Do Not Disturb" signs) is placed on the front doors in the neighborhood. The door hanger notes that a violation has occurred in the neighborhood, informs the reader why illegal dumping is a problem, and notes that illegal dumping carries a significant financial penalty. Information is also provided on what citizens can do as well as contact numbers for more information or to report a violation. The Port of Long Beach has a state of the art database incorporating storm drain infrastructure, potential pollutant sources, facility management practices, and a pollutant tracking system. The State Department of Fish and Game has a hotline for reporting violations called CalTIP (1- 800-952-5400). The phone number may be used to report any violation of a Fish and Game code (illegal dumping, poaching, etc.). The California Department of Toxic Substances Control's Waste Alert Hotline, 1-800-69TOXIC, can be used to report hazardous waste violations. References and Resources h_ptt ://www.stormwatercenter.net/ California's Nonpoint Source Program Plan httl2://www.co.clark.wa.us/pubworkslbmpman.pdf King County Stormwater Pollution Control Manual - http://dnr.metrokc.gov/wlr/dss/spcm.htm Orange County Stormwater Program, http://www.ocwatersheds.com/stormwater/swp_introduction.asp San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (hitp: //www.proj ectcleanwater.org) Santa Clara Valley Urban Runoff Pollution Prevention Program htW://www.scvurppp-w2k.com/pdf%2odocuments/PS ICID.PDF January 2003 California Stormwater BMP Handbook 11 of 11 Municipal www.cabmphandbooks.com Spill Prevention, Control & Cleanup SC-11 A Description Spills and leaks, if not properly controlled, can adversely impact the storm drain system and receiving waters. Due to the type of work or the materials involved, many activities that occur either at a municipal facility or as a part of municipal field programs have the potential for accidental spills and leaks. Proper spill response planning and preparation can enable municipal employees to effectively respond to problems when they occur and minimize the discharge of pollutants to the environment. Approach ■ An effective spill response and control plan should include: - Spill/leak prevention measures; - Spill response procedures; - Spill cleanup procedures; - Reporting; and - Training ■ A well thought out and implemented plan can prevent pollutants from entering the storm drainage system and can be used as a tool for training personnel to prevent and control future spills as well. Pollution Prevention ■ Develop and implement a Spill Prevention Control and Response Plan. The plan should include: Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize ■ Product Substitution Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Oxygen Demanding _ SQA California Stormwater 1% Quality Association J J January 2003 California Stormwater BMP Handbook 1 of 7 Municipal www.cabmphandbooks.com SC-11 Spill Prevention, Control & Cleanup - A description of the facility, the address, activities and materials involved - Identification of key spill response personnel - Identification of the potential spill areas or operations prone to spills/leaks - Identification of which areas should be or are bermed to contain spills/leaks - Facility map identifying the key locations of areas, activities, materials, structural BMPs, etc. - Material handling procedures - Spill response procedures including: - Assessment of the site and potential impacts - Containment of the material - Notification of the proper personnel and evacuation procedures - Clean up of the site - Disposal of the waste material and - Proper record keeping ■ Product substitution — use less toxic materials (i.e. use water based paints instead of oil based paints) ■ Recycle, reclaim, or reuse materials whenever possible. This will reduce the amount of materials that are brought into the facility or into the field. Suggested Protocols Spill/Leak Prevention Measures ■ If possible, move material handling indoors, under cover, or away from storm drains or sensitive water bodies. ■ Properly label all containers so that the contents are easily identifiable. ■ Berm storage areas so that if a spill or leak occurs, the material is contained. ■ Cover outside storage areas either with a permanent structure or with a seasonal one such as a tarp so that rain can not come into contact with the materials. ■ Check containers (and any containment sumps) often for leaks and spills. Replace containers that are leaking, corroded, or otherwise deteriorating with containers in good condition. Collect all spilled liquids and properly dispose of them. 2 of 7 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks. corn Spill Prevention, Control & Cleanup SC-11 ■ Store, contain and transfer liquid materials in such a manner that if the container is ruptured or the contents spilled, they will not discharge, flow or be washed into the storm drainage system, surface waters, or groundwater. ■ Place drip pans or absorbent materials beneath all mounted taps and at all potential drip and spill locations during the filling and unloading of containers. Any collected liquids or soiled absorbent materials should be reused/recycled or properly disposed of. ■ For field programs, only transport the minimum amount of material needed for the daily activities and transfer materials between containers at a municipal yard where leaks and spill are easier to control. ■ If paved, sweep and clean storage areas monthly, do not use water to hose down the area unless all of the water will be collected and disposed of properly. ■ Install a spill control device (such as a tee section) in any catch basins that collect runoff from any storage areas if the materials stored are oil, gas, or other materials that separate from and float on water. This will allow for easier cleanup if a spill occurs. ■ If necessary, protect catch basins while conducting field activities so that if a spill occurs, the material will be contained. Training ■ Educate employees about spill prevention, spill response and cleanup on a routine basis. ■ Well -trained employees can reduce human errors that lead to accidental releases or spills: - The employees should have the tools and knowledge to immediately begin cleaning up a spill if one should occur. - Employees should be familiar with the Spill Prevention Control and Countermeasure Plan if one is available. ■ Training of staff from all municipal departments should focus on recognizing and reporting potential or current spills/leaks and who they should contact. ■ Employees responsible for aboveground storage tanks and liquid transfers for large bulk containers should be thoroughly familiar with the Spill Prevention Control and Countermeasure Plan and the plan should be readily available. Spill Response and Prevention ■ Identify key spill response personnel and train employees on who they are. ■ Store and maintain appropriate spill cleanup materials in a clearly marked location near storage areas; and train employees to ensure familiarity with the site's spill control plan and/or proper spill cleanup procedures. ■ Locate spill cleanup materials, such as absorbents, where they will be readily accessible (e.g. near storage and maintenance areas, on field trucks). January 2003 California Stormwater BMP Handbook 3 of 7 Municipal www.cabmphandbooks. corn SC-11 Spill Prevention, Control & Cleanup ■ Follow the Spill Prevention Control and Countermeasure Plan if one is available. ■ If a spill occurs, notify the key spill response personnel immediately. If the material is unknown or hazardous, the local fire department may also need to be contacted. ■ If safe to do so, attempt to contain the material and block the nearby storm drains so that the area impacted is minimized. If the material is unknown or hazardous wait for properly trained personnel to contain the materials. ■ Perform an assessment of the area where the spill occurred and the downstream area that it could impact. Relay this information to the key spill response and clean up personnel. Spill Cleanup Procedures ■ Small non -hazardous spills - Use a rag, damp cloth or absorbent materials for general clean up of liquids - Use brooms or shovels for the general clean up of dry materials - If water is used, it must be collected and properly disposed of. The wash water can not be allowed to enter the storm drain. - Dispose of any waste materials properly - Clean or dispose of any equipment used to clean up the spill properly ■ Large non -hazardous spills - Use absorbent materials for general clean up of liquids - Use brooms, shovels or street sweepers for the general clean up of dry materials - If water is used, it must be collected and properly disposed of. The wash water can not be allowed to enter the storm drain. - Dispose of any waste materials properly - Clean or dispose of any equipment used to clean up the spill properly ■ For hazardous or very large spills, a private cleanup company or Hazmat team may need to be contacted to assess the situation and conduct the cleanup and disposal of the materials. ■ Chemical cleanups of material can be achieved with the use of absorbents, gels, and foams. Remove the adsorbent materials promptly and dispose of according to regulations. ■ If the spilled material is hazardous, then the used cleanup materials are also hazardous and must be sent to a certified laundry (rags) or disposed of as hazardous waste. Reporting ■ Report any spills immediately to the identified key municipal spill response personnel. 4 of 7 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Spill Prevention, Control & Cleanup SC-11 ■ Report spills in accordance with applicable reporting laws. Spills that pose an immediate threat to human health or the environment must be reported immediately to the Office of Emergency Service (OES) ■ Spills that pose an immediate threat to human health or the environment may also need to be reported within 24 hours to the Regional Water Quality Control Board. ■ Federal regulations require that any oil spill into a water body or onto an adjoining shoreline be reported to the National Response Center (NRC) at 800-424-8802 (24 hour) ■ After the spill has been contained and cleaned up, a detailed report about the incident should be generated and kept on file (see the section on Reporting below). The incident may also be used in briefing staff about proper procedures Other Considerations ■ State regulations exist for facilities with a storage capacity of io,000 gallons or more of petroleum to prepare a Spill Prevention Control and Countermeasure Plan (SPCC) Plan (Health & Safety Code Chapter 6.67). ■ State regulations also exist for storage of hazardous materials (Health & Safety Code Chapter 6.95), including the preparation of area and business plans for emergency response to the releases or threatened releases. ■ Consider requiring smaller secondary containment areas (less than 200 sq. ft.) to be connected to the sanitary sewer, if permitted to do so, prohibiting any hard connections to the storm drain. Requirements Costs ■ Will vary depending on the size of the facility and the necessary controls. ■ Prevention of leaks and spills is inexpensive. Treatment and/or disposal of wastes, contaminated soil and water is very expensive Maintenance ■ This BMP has no major administrative or staffing requirements. However, extra time is needed to properly handle and dispose of spills, which results in increased labor costs Supplemental Information Further Detail of the BMP Reporting Record keeping and internal reporting represent good operating practices because they can increase the efficiency of the response and containment of a spill. A good record keeping system helps the municipality minimize incident recurrence, correctly respond with appropriate containment and cleanup activities, and comply with legal requirements. January 2003 California Stormwater BMP Handbook 5 of 7 Municipal www.cabmphandbooks.com SC-11 Spill Prevention, Control & Cleanup A record keeping and reporting system should be set up for documenting spills, leaks, and other discharges, including discharges of hazardous substances in reportable quantities. Incident records describe the quality and quantity of non-stormwater discharges to the storm drain. These records should contain the following information: ■ Date and time of the incident ■ Weather conditions ■ Duration of the spill/leak/discharge ■ Cause of the spill/leak/discharge ■ Response procedures implemented ■ Persons notified ■ Environmental problems associated with the spill/leak/discharge Separate record keeping systems should be established to document housekeeping and preventive maintenance inspections, and training activities. All housekeeping and preventive maintenance inspections should be documented. Inspection documentation should contain the following information: ■ The date and time the inspection was performed ■ Name of the inspector ■ Items inspected ■ Problems noted ■ Corrective action required ■ Date corrective action was taken Other means to document and record inspection results are field notes, timed and dated photographs, videotapes, and drawings and maps. Examples The City of Palo Alto includes spill prevention and control as a major element of its highly effective program for municipal vehicle maintenance shops. References and Resources King County Stormwater Pollution Control Manual - http://dnr.metrokc.gov/wlr/dss/spcm.htm Orange County Stormwater Program http://www.ocwatersheds.com/stormwater/swp introduction. asp 6 of 7 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Spill Prevention, Control & Cleanup SC-11 San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP) http: / /www.projectcleanwater.org/pdf/Model % 2oProgram % 2oMunicipal%2oFacilities.pdf January 2003 California Stormwater BMP Handbook 7 of 7 Municipal www.cabmphandbooks.com Vehicle and Equipment Fueling SC-20 Description Spills and leaks that occur during vehicle and equipment fueling can contribute hydrocarbons, oil and grease, as well as heavy metals to stormwater runoff. Implementing the following management practices can help prevent fuel spills and leaks. Approach Reduce potential for pollutant discharge through source control pollution prevention and BMP implementation. Successful implementation depends on effective training of employees on applicable BMPs and general pollution prevention strategies and objectives. Pollution Prevention ■ Use properly maintained offsite fueling stations whenever possible. These businesses are better equipped to handle fuel and spills properly. ■ Educate employees about pollution prevention measures and goals ■ Focus pollution prevention activities on containment of spills and leaks, most of which may occur during liquid transfers. Suggested Protocols General ■ "Spot clean" leaks and drips routinely. Leaks are not cleaned up until the absorbent is picked up and disposed of properly. Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Oxygen Demanding ♦CASQA JCa�lifornia Stormwater --M*Quality Association JJ WA January 2003 California Stormwater BMP Handbook Municipal www.cabmphandbooks.com 1 of 6 SC-20 Vehicle and Equipment Fueling ■ Label drains within the facility boundary, by paint/stencil (or equivalent), to indicate whether they flow to an oil/water separator, directly to the sewer, or to a storm drain. Labels are not necessary for plumbing fixtures directly connected to the sanitary sewer but may be useful to help eliminate confusion about where the drain leads. ■ Post signs to remind employees not to top off the fuel tank when filling and signs that ban employees from changing engine oil or other fluids at that location. ■ Report leaking vehicles to fleet maintenance. ■ Install inlet catch basin equipped with a small sedimentation basin or grit chamber to remove large particles from stormwater in highly impervious areas. Proper maintenance of these devices is necessary. ■ Accumulated non -contaminated stormwater (e.g., in a secondary containment) should be released prior to next storm. ■ Ensure the following safeguards are in place: - Overflow protection devices on tank systems to warn the operator to automatically shutdown transfer pumps when the tank reaches full capacity. - Protective guards around tanks and piping to prevent vehicle or forklift damage. - Clearly tagging or labeling all valves to reduce human error. - Automatic shut off for severed fuel hoses. Fuel Dispensing Areas ■ Maintain clean fuel -dispensing areas using dry cleanup methods such as sweeping for removal of litter and debris, or use of rags and absorbents for leaks and spills. Do not wash down areas with water. ■ Fit underground storage tanks with spill containment and overfill prevention systems meeting the requirements of Section 2635(b) of Title 23 of the California Code of Regulations. ■ Fit fuel dispensing nozzles with "hold -open latches" (automatic shutoffs) except where prohibited by local fire departments. ■ Post signs at the fuel dispenser or fuel island warning vehicle owners/operators against "topping off' of vehicle fuel tanks. ■ Design fueling area to prevent stormwater runoff and spills. ■ Cover fueling area with an overhanging roof structure or canopy so that precipitation cannot come in contact with the fueling area and if possible use a perimeter drain or slope pavement inward with drainage to a blind sump (must be properly maintained and water properly disposed of); pave area with concrete rather than asphalt. 2 of 6 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks. corn Vehicle and Equipment Fueling SC-20 ■ Apply a suitable sealant that protects the asphalt from spilled fuels in areas where covering is infeasible and the fuel island is surrounded by pavement. ■ Install vapor recovery nozzles to help control drips as well as air pollution. ■ Use secondary containment when transferring fuel from the tank truck to the fuel tank. ■ Cover storm drains in the vicinity during transfer. Outdoor Waste Receptacle Area ■ Spot clean leaks and drips routinely to prevent runoff of spillage. ■ Minimize the possibility of stormwater pollution from outside waste receptacles by using an effective combination of the following: - use only watertight waste receptacle(s) and keep the lid(s) closed, or - grade and pave the waste receptacle area to prevent runon of stormwater, or - install a roof over the waste receptacle area, or - install a low containment berm around the waste receptacle area, or - use and maintain drip pans under waste receptacles. Containment areas and drip pans must be properly maintained and collected water disposed of properly (e.g., to sanitary sewer). Several drip pans should be stored in a covered location near outdoor waste receptacle area so that they are always available, yet protected from precipitation when not in use. ■ Post "no littering" signs. Air/Water Supply Area ■ Minimize the possibility of stormwater pollution from air/water supply areas by implementing an effective combination of the following: - spot clean leaks and drips routinely to prevent runoff of spillage, or - grade and pave the air/water supply area to prevent runon of stormwater, or - install a roof over the air/water supply area, or - install a low containment berm around the air/water supply area. Maintain containment areas and dispose of contaminated water properly (e.g., to sanitary sewer). Inspection ■ Aboveground Tank Leak and Spill Control: - Check for external corrosion and structural failure. January 2003 California Stormwater BMP Handbook 3 of 6 Municipal www.cabmphandbooks. corn SC-20 Vehicle and Equipment Fueling - Check for spills and overfills due to operator error. - Check for failure of piping system. - Check for leaks or spills during pumping of liquids or gases from truck or rail car to a storage facility or vice versa. - Visually inspect new tank or container installation for loose fittings, poor welding, and improper or poorly fitted gaskets. - Inspect tank foundations, connections, coatings, and tank walls and piping system. Look for corrosion, leaks, cracks, scratches, and other physical damage that may weaken the tank or container system. - Periodically, integrity testing should be conducted by a qualified professional. ■ Inspect and clean, if necessary, storm drain inlets and catch basins within the facility boundary before October 1 each year. Training ■ Train all employees upon hiring and annually thereafter on proper methods for handling and disposing of waste. Make sure that all employees understand stormwater discharge prohibitions, wastewater discharge requirements, and these best management practices. ■ Train employees on proper fueling and cleanup procedures. ■ Use a training log or similar method to document training. ■ Ensure that employees are familiar with the site's spill control plan and/or proper spill cleanup procedures. Spill Response and Prevention ■ Keep your Spill Prevention Control and Countermeasure (SPCC) Plan up-to-date. ■ Place stockpiles of spill cleanup materials where they are readily accessible. ■ Use adsorbent materials on small spills and general cleaning rather than hosing down the area. Remove the adsorbent materials promptly and dispose properly. ■ Store portable absorbent booms (long flexible shafts or barriers made of absorbent material) in unbermed fueling areas. ■ Report spills promptly. ■ Install an oil/water separator and connect to the sanitary sewer (if allowed), if a dead-end sump is not used to collect spills. Other Considerations ■ Carry out all federal and state requirements regarding underground storage tanks, or install above ground tanks. 4 of 6 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks. corn Vehicle and Equipment Fueling SC-20 Requirements Costs ■ The retrofitting of existing fueling areas to minimize stormwater exposure or spill runoff can be expensive. Good design must occur during the initial installation. ■ Extruded curb along the "upstream" side of the fueling area to prevent stormwater runon is of modest cost. Maintenance ■ Clean oil/water separators at appropriate intervals. ■ Keep ample supplies of spill cleanup materials onsite. ■ Inspect fueling areas, storage tanks, catch basin inserts, containment areas, and drip pans on a regular schedule. Supplemental Information Design Considerations Designing New Installations The elements listed below should be included in the design and construction of new or substantially remodeled facilities. Fuel Dispensing Areas ■ Fuel dispensing areas must be paved with Portland cement concrete (or, equivalent smooth impervious surface), with a 2% to 4% slope to prevent ponding, and must be separated from the rest of the site by a grade break that prevents runon of stormwater to the extent practicable. The fuel dispensing area is defined as extending 6.5 feet from the corner of each fuel dispenser or the length at which the hose and nozzle assembly may be operated plus 1 foot, whichever is less. The paving around the fuel dispensing area may exceed the minimum dimensions of the "fuel dispensing area" stated above. ■ The fuel dispensing area must be covered, and the cover's minimum dimensions must be equal to or greater than the area within the grade break or the fuel dispensing area, as defined above. The cover must not drain onto the fuel dispensing area. ■ If necessary install and maintain an oil control device in the appropriate catch basin(s) to treat runoff from the fueling area. Outdoor Waste Receptacle Area ■ Grade and pave the outdoor waste receptacle area to prevent runon of stormwater to the extent practicable. Air/Water Supply Area ■ Grade and pave the air/water supply area to prevent runon of stormwater to the extent practicable. January 2003 California Stormwater BMP Handbook 5 of 6 Municipal www.cabmphandbooks. corn SC-20 Vehicle and Equipment Fueling Designated Fueling Area If your facility has large numbers of mobile equipment working throughout the site and you currently fuel them with a mobile fuel truck, consider establishing a designated fueling area. With the exception of tracked equipment such as bulldozers and perhaps small forklifts, most vehicles should be able to travel to a designated area with little lost time. Place temporary "caps" over nearby catch basins or manhole covers so that if a spill occurs it is prevented from entering the storm drain. Examples The Spill Prevention Control and Countermeasure (SPCC) Plan, which is required by law for some facilities, is an effective program to reduce the number of accidental spills and minimize contamination of stormwater runoff. The City of Palo Alto has an effective program for commercial vehicle service facilities. Many of the program's elements, including specific BMP guidance and lists of equipment suppliers, are also applicable to industrial facilities. References and Resources Best Management Practice Guide for Retail Gasoline Outlets, California Stormwater Quality Task Force. 1997• King County Stormwater Pollution Control Manual — http/ /www.dnr.metroke.gov/wlr/dss/spcm.htm Orange County Stormwater Program http://www.ocwatersheds.com/StormWater/swp introduction. asp San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP) 6 of 6 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Vehicle and Equipment Cleaning SC-21 Photo Credit: Geoff Brosseau Description Wash water from vehicle and equipment cleaning activities performed outdoors or in areas where wash water flows onto the ground can contribute toxic hydrocarbons and other organic compounds, oils and greases, nutrients, phosphates, heavy metals, and suspended solids to stormwater runoff. Use of the procedures outlined below can prevent or reduce the discharge of pollutants to stormwater during vehicle and equipment cleaning. Approach Reduce potential for pollutant discharge through source control pollution prevention and BMP implementation. Successful implementation depends on effective training of employees on applicable BMPs and general pollution prevention strategies and objectives Pollution Prevention ■ If possible, use properly maintained off -site commercial washing and steam cleaning businesses whenever possible. These businesses are better equipped to handle and properly dispose of the wash waters. ■ Good housekeeping practices can minimize the risk of contamination from wash water discharges. Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize ■ Product Substitution Targeted Constituents Sediment ✓ Nutrients ✓ Trash ✓ Metals ✓ Bacteria Oil and Grease ✓ Organics ✓ Oxygen Demanding _ SQA California Stormwater 1% Quality Association January 2003 California Stormwater BMP Handbook 1 of 4 Municipal www.cabmphandbooks.com SC-21 Vehicle and Equipment Cleaning Suggested Protocols General ■ Use biodegradable, phosphate -free detergents for washing vehicles as appropriate. ■ Mark the area clearly as a wash area. ■ Post signs stating that only washing is allowed in wash area and that discharges to the storm drain are prohibited. ■ Provide a trash container in wash area. ■ Map on -site storm drain locations to avoid discharges to the storm drain system. ■ Emphasize the connection between the storm drain system and runoff and help reinforce that car washing activities can have an affect on local water quality. This can be accomplished through storm drain stenciling programs. Vehicle and Equipment Cleaning ■ Design wash areas to properly collect and dispose of wash water when engine cleaning is conducted and when chemical additives, solvents, or degreasers are used. This may include installation of sumps or drain lines to collect wash water or construction of a berm around the designated area and grading of the area to collect wash water as well as prevent stormwater run-on. ■ Consider washing vehicles and equipment inside the building if washing/cleaning must occur on -site. This will help to control the targeted constituents by directing them to the sanitary sewer. ■ If washing must occur on -site and outdoor: - Use designated paved wash areas. Designated wash areas must be well marked with signs indicating where and how washing must be done. This area must be covered or bermed to collect the wash water and graded to direct the wash water to a treatment or disposal facility. - Oil changes and other engine maintenance cannot be conducted in the designated washing area. Perform these activities in a place designated for such activities. - Cover the wash area when not in use to prevent contact with rain water. ■ Use hoses with nozzles that automatically turn off when left unattended. ■ Perform pressure cleaning and steam cleaning off -site to avoid generating runoff with high pollutant concentrations. If done on -site, no pressure cleaning and steam cleaning should be done in areas designated as wellhead protection areas for public water supply. Disposal ■ Consider filtering and recycling wash water. 2 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Vehicle and Equipment Cleaning SC-21 ■ Discharge equipment wash water to the sanitary sewer, a holding tank, or a process treatment system, regardless of the washing method used. ■ Discharge vehicle wash water to (1) the sanitary sewer, a holding tank, or process treatment system or (2) an enclosed recycling system. ■ Discharge wash water to sanitary sewer only after contacting the local sewer authority to find out if pretreatment is required. Training ■ Train employees on proper cleaning and wash water disposal procedures and conduct "refresher" courses on a regular basis. ■ Train staff on proper maintenance measures for the wash area. ■ Train employees and contractors on proper spill containment and cleanup. The employee should have the tools and knowledge to immediately begin cleaning up a spill if one should occur. Spill Response and Prevention ■ Refer to SC-ii, Spill Prevention, Control and Cleanup. ■ Keep your Spill Prevention Control and Counter Measure (SPCC) Plan up-to-date, and implement accordingly. ■ Have spill cleanup materials readily available and in a known location. ■ Clean up spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. Other Considerations (Limitations and Regulations) ■ Some municipalities may require pretreatment and monitoring of wash water discharges to the sanitary sewer. ■ Steam cleaning can generate significant pollutant concentrations requiring that careful consideration be given to the environmental impacts and compliance issues related to steam cleaning. ■ Most car washing best management practices are inexpensive, and rely more on good housekeeping practices (where vehicles are washed, planning for the collection of wash water) than on expensive technology. However, the construction of a specialized area for vehicle washing can be expensive for municipal facilities. Also, for facilities that cannot recycle their wash water the cost of pre -treating wash water through either structural practices or planning for collection and hauling of contaminated water to sewage treatment plants can represent a cost limitation. Requirements Costs ■ Capital costs vary depending on measures implemented January 2003 California Stormwater BMP Handbook 3 of 4 Municipal www.cabmphandbooks.com SC-21 Vehicle and Equipment Cleaning - Low cost ($500-1,o00) for berm construction, - Medium cost ($5,000-20,000) for plumbing modifications (including re-routing discharge to sanitary sewer and installing simple sump). - High cost ($30,000-150,000) for on -site treatment and recycling. ■ O&M costs increase with increasing capital investment. Maintenance ■ Berm repair and patching. ■ Sweep washing areas frequently to remove solid debris. ■ Inspect and maintain sumps, oil/water separators, and on -site treatment/recycling units. Supplemental Information Design Considerations Designated Cleaning Areas ■ Washing operations outside should be conducted in a designated wash area having the following characteristics: - Paved with Portland cement concrete, - Covered and bermed to prevent contact with stormwater and contain wash water, - Sloped for wash water collection, - Equipped with an oil/water separator, if necessary. Examples The City of Palo Alto has an effective program for commercial vehicle service facilities. Many of the program's elements, including specific BMP guidance and lists of equipment suppliers, are applicable to industrial vehicle service facilities. The U.S. Postal Service in West Sacramento has a new vehicle wash system that collects, filters, and recycles the wash water. References and Resources http://www.stormwatercenter.net/ King County - ftp://dnr.metrokc.gov/wlr/dss/spcm/Chapter%203.PDF Orange County Stormwater Program http://www.ocwatersheds.com/StormWater/swp introduction. asp San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP) httD: / /www.Droiectcleanwater.ora/Ddf/Model%2oProaram%2oMuniCiDal%2oFacilities.Ddf 4 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Outdoor Loading/Unloading Description The loading/unloading of materials usually takes place outside on docks or terminals; therefore, materials spilled, leaked, or lost during loading/unloading may collect in the soil or on other surfaces and have the potential to be carried away by stormwater runoff or when the area is cleaned. Additionally, rainfall may wash pollutants from machinery used to unload or move materials. Loading and unloading of material may include package products, barrels, and bulk products. Implementation of the following protocols will prevent or reduce the discharge of pollutants to stormwater from outdoor loading/unloading of materials. Approach Pollution Prevention ■ Keep accurate maintenance logs to evaluate materials removed and improvements made. ■ Park tank trucks or delivery vehicles in designated areas so that spills or leaks can be contained. ■ Limit exposure of materials with the potential to contaminate stormwater. ■ Prevent stormwater runon. ■ Regularly check equipment for leaks. SC-30 Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize ■ Product Substitution Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Oxygen Demanding CASQA California Stormwater 1% Quality Association JJ J January 2003 California Stormwater BMP Handbook 1 of 4 Municipal www.cabmphandbooks.com SC-30 Outdoor Loading/Unloading Suggested Protocols Loading and Unloading — General Guidelines ■ Develop an operations plan that describes procedures for loading and/or unloading. ■ Do not conduct loading and unloading during wet weather, whenever possible. ■ Cover designated loading/unloading areas to reduce exposure of materials to rain. ■ A seal or door skirt between delivery vehicles and building can reduce or prevent exposure to rain. ■ Design loading/unloading area to prevent stormwater runon which would include grading or berming the area, and positioning roof downspouts so they direct stormwater away from the loading/unloading areas. ■ If feasible, load and unload all materials and equipment in covered areas such as building overhangs at loading docks. ■ Load/unload only at designated loading areas. ■ Use drip pans underneath hose and pipe connections and other leak -prone spots during liquid transfer operations, and when making and breaking connections. Several drip pans should be stored in a covered location near the liquid transfer area so that they are always available, yet protected from precipitation when not in use. Drip pans can be made specifically for railroad tracks. Drip pans must be cleaned periodically, and drip collected materials must be disposed of properly. ■ Pave loading areas with concrete instead of asphalt. ■ Avoid placing storm drains in the area. ■ Grade and/or berm he loading/ unloading area to a drain that is connected to a dead-end sump. Inspection ■ Check loading and unloading equipment regularly for leaks, including valves, pumps, flanges and connections. ■ Look for dust or fumes during loading or unloading operations. Training ■ Train employees (e.g. fork lift operators) and contractors on proper spill containment and cleanup. ■ Employees trained in spill containment and cleanup should be present during the loading/unloading. ■ Train employees in proper handling techniques during liquid transfers to avoid spills. 2 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Outdoor Loading/Unloading SC-30 ■ Make sure forklift operators are properly trained on loading and unloading procedures. Spill Response and Prevention ■ Refer to SC-ii, Spill Prevention, Control & Cleanup ■ Keep your spill prevention Control and countermeasure (SPCC) Plan up-to-date, and implement accordingly. ■ Have spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. Other Considerations ■ Space, material characteristics and/or time limitations may preclude all transfers from being performed indoors or under cover. Requirements Costs ■ Should be low except when covering a large loading/unloading area. Maintenance ■ Conduct regular inspections and make repairs as necessary. The frequency of repairs will depend on the age of the facility. ■ Check loading and unloading equipment regularly for leaks. ■ Regular broom dry -sweeping of area. ■ Conduct major clean -out of loading and unloading area and sump prior to October 1 of each year. Supplemental Information Further Detail of the BMP Special Circumstances for Indoor Loading/Unloading of Materials As appropriate loading or unloading of liquids should occur indoors so that any spills that are not completely retained can be discharged to the sanitary sewer, treatment plant, or treated in a manner consistent with local sewer authorities and permit requirements. ■ For loading and unloading tank trucks to above and below ground storage tanks, the following procedures should be used: - The area where the transfer takes place should be paved. If the liquid is reactive with the asphalt, Portland cement should be used to pave the area. - Transfer area should be designed to prevent runon of stormwater from adjacent areas. Sloping the pad and using a curb, like a speed bump, around the uphill side of the transfer area should reduce run-on. January 2003 California Stormwater BMP Handbook 3 of 4 Municipal www.cabmphandbooks.com SC-30 Outdoor Loading/Unloading - Transfer area should be designed to prevent runoff of spilled liquids from the area. Sloping the area to a drain should prevent runoff. The drain should be connected to a dead-end sump or to the sanitary sewer (if allowed). A positive control valve should be installed on the drain. ■ For transfer from rail cars to storage tanks that must occur outside, use the following procedures: Drip pans should be placed at locations where spillage may occur, such as hose connections, hose reels, and filler nozzles, Use drip pans when making and breaking connections. - Drip pan systems should be installed between the rails to collect spillage from tank cars. References and Resources http://www.stormwatercenter.net/ King County - ftp://dnr.metroke.gov/wlr/dss/spem/Chapter%203.PDF Orange County Stormwater Program http://www.ocwatersheds.com/StormWater/sv,7p—introduction.asp San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP) - http://www.projectcleanwater.org/pdf/Model % 2oProgram % 2oMunicipal % 2oFacilities.pdf 4 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Outdoor Container Storage SC-31 I - Description Accidental releases of materials from above ground liquid storage tanks, drums, and dumpsters present the potential for contaminating stormwaters with many different pollutants. Tanks may store many potential stormwater runoff pollutants, such as gasoline, aviation gas, diesel fuel, ammonia, solvents, syrups, etc. Materials spilled, leaked, or lost from storage tanks may accumulate in soils or on other surfaces and be carried away by rainfall runoff. These source controls apply to containers located outside of a building used to temporarily store liquid materials and include installing safeguards against accidental releases, installing secondary containment, conducting regular inspections, and training employees in standard operating procedures and spill cleanup techniques. Approach Pollution Prevention ■ Educate employees about pollution prevention measures and goals ■ Keep an accurate, up-to-date inventory of the materials delivered and stored on -site. Re-evaluate inventory needs and consider purchasing alternative products. Properly dispose of outdated products. ■ Try to keep chemicals in their original containers, and keep them well labeled. Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize ■ Product Substitution Targeted Constituents Sediment Nutrients Q Trash Metals Q Bacteria Oil and Grease Q Organics Q Oxygen Demanding Q January 2003 California Stormwater BMP Handbook 1 of 8 Municipal www.cabmphandbooks.com SC-31 Outdoor Container Storage Suggested Protocols General ■ Develop an operations plan that describes procedures for loading and/or unloading. Refer to SC-30 Outdoor Loading/Unloading for more detailed BMP information pertaining to loading and unloading of liquids. ■ Protect materials from rainfall, runon, runoff, and wind dispersal: - Cover the storage area with a roof. - Minimize stormwater runon by enclosing the area or building a berm around it. - Use a "doghouse" structure for storage of liquid containers. - Use covered dumpsters for waste product containers. ■ Employ safeguards against accidental releases: - Provide overflow protection devices to warn operator or automatic shut down transfer pumps. - Provide protection guards (bollards) around tanks and piping to prevent vehicle or forklift damage, and - Provide clear tagging or labeling, and restricting access to valves to reduce human error. ■ Berm or surround tank or container with secondary containment system using dikes, liners, vaults, or double walled tanks. ■ Contact the appropriate regulatory agency regarding environmental compliance for facilities with "spill ponds" designed to intercept, treat, and/or divert spills. ■ Have registered and specifically trained professional engineers can identify and correct potential problems such as loose fittings, poor welding, and improper or poorly fitted gaskets for newly installed tank systems. Storage Areas ■ Provide storage tank piping located below product level with a shut-off valve at the tank; ideally this valve should be an automatic shear valve with the shut-off located inside the tank. ■ Provide barriers such as posts or guard rails, where tanks are exposed, to prevent collision damage with vehicles. ■ Provide secure storage to prevent vandalism. ■ Place tight -fitting lids on all containers. ■ Enclose or cover the containers where they are stored. 2 of 8 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Outdoor Container Storage SC-31 ■ Raise the containers off the ground by use of pallet or similar method, with provisions for spill control and secondary containment. ■ Contain the material in such a manner that if the container leaks or spills, the contents will not discharge, flow, or be washed into the storm drainage system, surface waters or groundwater. ■ Place drip pans or absorbent materials beneath all mounted container taps, and at all potential drip and spill locations during filling and unloading of containers. Drip pans must be cleaned periodically, and all collected liquids and soiled absorbent materials must be reused/recycled or properly disposed. ■ Ensure that any underground or aboveground storage tanks shall be designed and managed in accordance with applicable regulations, be identified as a potential pollution source, have secondary containment, such as a berm or dike with an impervious surface. ■ Rainfall collected in secondary containment system must not contain pollutants for discharge to storm drain system. Container Management ■ Keep containers in good condition without corrosion or leaky seams. ■ Place containers in a lean-to structure or otherwise covered to keep rainfall from reaching the drums. ■ Replace containers if they are deteriorating to the point where leakage is occurring. Keep all containers undercover to prevent the entry of stormwater. Employees should be made aware of the importance of keeping the containers free from leaks. ■ Keep waste container drums in an area such as a service bay. Drums stored outside must be stored in a lean-to type structure, shed or walk-in container. Storage of Hazardous Materials ■ Storage of reactive, ignitable, or flammable liquids must comply with the fire and hazardous waste codes. ■ Place containers in a designated area that is paved, free of cracks and gaps, and impervious in order to contain leaks and spills. The area should also be covered. ■ Surround stored hazardous materials and waste with a curb or dike to provide the volume to contain io percent of the volume of all of the containers or iio percent of the volume of the largest container, whichever is greater. The area inside the curb should slope to a drain and a dead-end sump should be installed in the drain. Inspection ■ Provide regular inspections: - Inspect storage areas regularly for leaks or spills. January 2003 California Stormwater BMP Handbook 3 of 8 Municipal www.cabmphandbooks.com SC-31 Outdoor Container Storage - Conduct routine inspections and check for external corrosion of material containers. Also check for structural failure, spills and overfills due to operator error, failure of piping system. - Check for leaks or spills during pumping of liquids or gases from truck or rail car to a storage facility or vice versa. Visually inspect new tank or container installations for loose fittings, poor welding, and improper or poorly fitted gaskets. Inspect tank foundations, connections, coatings, and tank walls and piping system. Look for corrosion, leaks, cracks, scratches, and other physical damage that may weaken the tank or container system. Replace containers that are leaking, corroded, or otherwise deteriorating with ones in good condition. If the liquid chemicals are corrosive, containers made of compatible materials must be used instead of metal drums. - Label new or secondary containers with the product name and hazards. Training ■ Train employees (e.g. fork lift operators) and contractors in proper spill containment and cleanup. The employee should have the tools and knowledge to immediately begin cleaning up a spill if one should occur. ■ Train employees in proper storage measures. ■ Use a training log or similar method to document training. Spill Response and Prevention ■ Keep your Spill Prevention Control and Countermeasure (SPCC) Plan up-to-date, and implement accordingly. ■ Have an emergency plan, equipment and trained personnel ready at all times to deal immediately with major spills. ■ Collect all spilled liquids and properly dispose of them. ■ Employees trained in emergency spill cleanup procedures should be present when dangerous waste, liquid chemicals, or other wastes are delivered. ■ Operator errors can be prevented by using engineering safe guards and thus reducing accidental releases of pollutant. ■ Store and maintain appropriate spill cleanup materials in a location known to all near the tank storage area. ■ See Aboveground Tank Leak and Spill Control section of the Spill Prevention, Control & Cleanup fact sheet (SC-ii) for additional information. 4 of 8 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Outdoor Container Storage SC-31 Other Considerations ■ Storage sheds often must meet building and fire code requirements. ■ The local fire district must be consulted for limitations on clearance of roof covers over containers used to store flammable materials. ■ All specific standards set by federal and state laws concerning the storage of oil and hazardous materials must be met. ■ Storage of reactive, ignitable, or flammable liquids should comply with the Uniform Fire Code and the National Electric Code. ■ Storage of oil and hazardous materials must meet specific federal and state standards including: - Spill Prevention Control and Countermeasure Plan (SPCC) Plan - Secondary containment - Integrity and leak detection monitoring - Emergency preparedness plans Requirements Costs ■ Will vary depending on the size of the facility and the necessary controls, such as berms or safeguards against accidental controls. Maintenance ■ Conduct weekly inspection. ■ Sweep and clean the storage area regularly if it is paved, do not hose down the area to a storm drain. Supplemental Information ■ The most common causes of unintentional releases are: - Installation problems, - Failure of piping systems (pipes, pumps, flanges, couplings, hoses, and valves), - External corrosion and structural failure, - Spills and overfills due to operator error, and - Leaks during pumping of liquids or gases from truck or rail car to a storage tank or vice versa January 2003 California Stormwater BMP Handbook 5 of 8 Municipal www.cabmphandbooks.com SC-31 Outdoor Container Storage Further Detail of the BMP Dikes One of the best protective measures against contamination of stormwater is diking. Containment dikes are berms or retaining walls that are designed to hold spills. Diking is an effective pollution prevention measure for above ground storage tanks and railcar or tank truck loading and unloading areas. The dike surrounds the area of concern and holds the spill, keeping spill materials separated from the stormwater side of the dike area. Diking can be used in any industrial or municipal facility, but it is most commonly used for controlling large spills or releases from liquid storage areas and liquid transfer areas. ■ For single -wall tanks, containment dikes should be large enough to hold the contents of the storage tank for the facility plus rain water. ■ For trucks, diked areas should be capable of holding an amount equal to the volume of the tank truck compartment. Diked construction material should be strong enough to safely hold spilled materials. ■ Dike materials can consist of earth, concrete, synthetic materials, metal, or other impervious materials. ■ Strong acids or bases may react with metal containers, concrete, and some plastics. ■ Where strong acids or bases or stored, alternative dike materials should be considered. More active organic chemicals may need certain special liners for dikes. ■ Dikes may also be designed with impermeable materials to increase containment capabilities. ■ Dikes should be inspected during or after significant storms or spills to check for washouts or overflows. ■ Regular checks of containment dikes to insure the dikes are capable of holding spills should be conducted. ■ Inability of a structure to retain stormwater, dike erosion, soggy areas, or changes in vegetation indicate problems with dike structures. Damaged areas should be patched and stabilized immediately. ■ Accumulated stormwater in the containment are should be analyzed for pollutants before it is released to surface waters. If pollutants are found or if stormwater quality is not determined, then methods other than discharging to surface waters should be employed (e.g., discharge to sanitary sewer if allowed). ■ Earthen dikes may require special maintenance of vegetation such as mulching and irrigation. 6 of 8 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Outdoor Container Storage SC-31 Curbing Curbing is a barrier that surrounds an area of concern. Curbing is similar to containment diking in the way that it prevents spills and leaks from being released into the environment. The curbing is usually small scaled and does not contain large spills like diking. Curbing is common at many facilities in small areas where handling and transfer liquid materials occur. Curbing can redirect stormwater away from the storage area. It is useful in areas where liquid materials are transferred from one container to another. Asphalt is a common material used for curbing; however, curbing materials include earth, concrete, synthetic materials, metal, or other impenetrable materials. ■ Spilled materials should be removed immediately from curbed areas to allow space for future spills. ■ Curbs should have manually -controlled pump systems rather than common drainage systems for collection of spilled materials. ■ The curbed area should be inspected regularly to clear clogging debris. ■ Maintenance should also be conducted frequently to prevent overflow of any spilled materials as curbed areas are designed only for smaller spills. ■ Curbing has the following advantages: - Excellent runon control, - Inexpensive, - Ease of installment, - Provides option to recycle materials spilled in curb areas, and - Common industry practice. Examples The "doghouse" design has been used to store small liquid containers. The roof and flooring design prevent contact with direct rain or runoff. The doghouse has two solid structural walls and two canvas covered walls. The flooring is wire mesh about secondary containment. The unit has been used successfully at Lockheed Missile and Space Company in Sunnyvale. References and Resources British Columbia Lake Stewardship Society. Best Management Practices to Protect Water Quality from Non -Point Source Pollution. March 2000 http://www.nalms.org/bclss/storage.html King County Stormwater Pollution Control Manual — http://dnr. metroke.gov/wlr/dss/spcm.htm January 2003 California Stormwater BMP Handbook 7 of 8 Municipal www.cabmphandbooks.com SC-31 Outdoor Container Storage San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP) - http: //www.projecteleanwater. org/pdf/Model%2oProgram %2 oMunicipal%2oFacilities.pdf 8 of 8 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Waste Handling & Disposal SC-34 Description Improper storage and handling of solid wastes can allow tonic compounds, oils and greases, heavy metals, nutrients, suspended solids, and other pollutants to enter stormwater runoff. The discharge of pollutants to stormwater from waste handling and disposal can be prevented and reduced by tracking waste generation, storage, and disposal; reducing waste generation and disposal through source reduction, re -use, and recycling; and preventing runon and runoff. Approach Pollution Prevention ■ Reduction in the amount of waste generated can be accomplished using the following source controls such as: - Production planning and sequencing - Process or equipment modification - Raw material substitution or elimination - Loss prevention and housekeeping - Waste segregation and separation - Close loop recycling ■ Establish a material tracking system to increase awareness about material usage. This may reduce spills and minimize contamination, thus reducing the amount of waste produced. ■ Recycle materials whenever possible. Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize ■ Product Substitution Targeted Constituents Sediment L( Nutrients Q Trash Q Metals Q Bacteria Q Oil and Grease Q Organics Q Oxygen Demanding Q January 2003 California Stormwater BMP Handbook 1 of 5 Municipal www.cabmphandbooks.com SC-34 Waste Handling & Disposal Suggested Protocols General ■ . Cover storage containers with leak proof lids or some other means. If waste is not in containers, cover all waste piles (plastic tarps are acceptable coverage) and prevent stormwater runon and runoff with a berm. The waste containers or piles must be covered except when in use. ■ Use drip pans or absorbent materials whenever grease containers are emptied by vacuum trucks or other means. Grease cannot be left on the ground. Collected grease must be properly disposed of as garbage. ■ Check storage containers weekly for leaks and to ensure that lids are on tightly. Replace any that are leaking, corroded, or otherwise deteriorating. ■ Sweep and clean the storage area regularly. If it is paved, do not hose down the area to a storm drain. ■ Dispose of rinse and wash water from cleaning waste containers into a sanitary sewer if allowed by the local sewer authority. Do not discharge wash water to the street or storm drain. ■ Transfer waste from damaged containers into safe containers. ■ Take special care when loading or unloading wastes to minimize losses. Loading systems can be used to minimize spills and fugitive emission losses such as dust or mist. Vacuum transfer systems can minimize waste loss. Controlling Litter ■ Post "No Littering" signs and enforce anti -litter laws. ■ Provide a sufficient number of litter receptacles for the facility. ■ Clean out and cover litter receptacles frequently to prevent spillage. Waste Collection ■ Keep waste collection areas clean. ■ Inspect solid waste containers for structural damage or leaks regularly. Repair or replace damaged containers as necessary. ■ Secure solid waste containers; containers must be closed tightly when not in use. ■ Place waste containers under cover if possible. ■ Do not fill waste containers with washout water or any other liquid. ■ Ensure that only appropriate solid wastes are added to the solid waste container. Certain wastes such as hazardous wastes, appliances, fluorescent lamps, pesticides, etc. may not be 2 of 5 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Waste Handling & Disposal SC-34 disposed of in solid waste containers (see chemical/ hazardous waste collection section below). ■ Do not mix wastes; this can cause chemical reactions, make recycling impossible, and complicate disposal. Good Housekeeping ■ Use all of the product before disposing of the container. ■ Keep the waste management area clean at all times by sweeping and cleaning up spills immediately. ■ Use dry methods when possible (e.g. sweeping, use of absorbents) when cleaning around restaurant/food handling dumpster areas. If water must be used after sweeping/using absorbents, collect water and discharge through grease interceptor to the sewer. ■ Stencil storm drains on the facility's property with prohibitive message regarding waste disposal. Chemical/Hazardous Wastes ■ Select designated hazardous waste collection areas on -site. ■ Store hazardous materials and wastes in covered containers protected from vandalism, and in compliance with fire and hazardous waste codes. ■ Place hazardous waste containers in secondary containment. ■ Make sure that hazardous waste is collected, removed, and disposed of only at authorized disposal areas. Runon/Runoff Prevention ■ Prevent stormwater runon from entering the waste management area by enclosing the area or building a berm around the area. ■ Prevent the waste materials from directly contacting rain. ■ Cover waste piles with temporary covering material such as reinforced tarpaulin, polyethylene, polyurethane, polypropyleneor hypalon. ■ Cover the area with a permanent roof if feasible. ■ Cover dumpsters to prevent rain from washing waste out of holes or cracks in the bottom of the dumpster. ■ Move the activity indoor after ensuring all safety concerns such as fire hazard and ventilation are addressed. Inspection January 2003 California Stormwater BMP Handbook 3 of 5 Municipal www.cabmphandbooks.com SC-34 Waste Handling & Disposal ■ Inspect and replace faulty pumps or hoses regularly to minimize the potential of releases and spills. ■ Check waste management areas for leaking containers or spills. ■ Repair leaking equipment including valves, lines, seals, or pumps promptly. Training ■ Train staff pollution prevention measures and proper disposal methods. ■ Train employees and contractors proper spill containment and cleanup. The employee should have the tools and knowledge to immediately begin cleaning up a spill if one should occur. ■ Train employees and subcontractors in proper hazardous waste management. Spill Response and Prevention ■ Refer to SC-ii, Spill Prevention, Control & Cleanup. ■ Keep your Spill Prevention Control and countermeasure (SPCC) plan up-to-date, and implement accordingly. ■ Have spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. ■ Vehicles transporting waste should have spill prevention equipment that can prevent spills during transport. The spill prevention equipment includes: - Vehicles equipped with baffles for liquid waste - Trucks with sealed gates and spill guards for solid waste Other Considerations ■ Hazardous waste cannot be re -used or recycled; it must be disposed of by a licensed hazardous waste hauler. Requirements Costs ■ Capital and operation and maintenance costs will vary substantially depending on the size of the facility and the types of waste handled. Costs should be low if there is an inventory program in place. Maintenance ■ None except for maintaining equipment for material tracking program. 4 of 5 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Waste Handling & Disposal SC-34 Supplemental Information Further Detail of the BMP Land Treatment System ■ Minimize the runoff of polluted stormwater from land application of municipal waste on -site by: - Choosing a site where slopes are under 6%, the soil is permeable, there is a low water table, it is located away from wetlands or marshes, there is a closed drainage system. Avoiding application of waste to the site when it is raining or when the ground is saturated with water. - Growing vegetation on land disposal areas to stabilize soils and reduce the volume of surface water runoff from the site. - Maintaining adequate barriers between the land application site and the receiving waters. Planted strips are particularly good. - Using erosion control techniques such as mulching and matting, filter fences, straw bales, diversion terracing, and sediment basins. - Performing routine maintenance to ensure the erosion control or site stabilization measures are working. References and Resources King County Stormwater Pollution Control Manual - http:IIdnr.metrokc.gov/wlr/dss/spcm.htm Orange County Stormwater Program http://www.ocwatersheds.com/StormWater/swp_introduction.asp Pollution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies Associations (BASMAA). On-line: htt://www.basmaa.org January 2003 California Stormwater BMP Handbook 5 of 5 Municipal www.cabmphandbooks.com Building & Grounds Maintenance SC-41 Description Stormwater runoff from building and grounds maintenance activities can be contaminated with toxic hydrocarbons in solvents, fertilizers and pesticides, suspended solids, heavy metals, and abnormal pH. Utilizing the following protocols will prevent or reduce the discharge of pollutants to stormwater from building and grounds maintenance activities by washing and cleaning up with as little water as possible, following good landscape management practices, preventing and cleaning up spills immediately, keeping debris from entering the storm drains, and maintaining the stormwater collection system. Approach Pollution Prevention ■ Switch to non -toxic chemicals for maintenance when possible. ■ Choose cleaning agents that can be recycled. ■ Encourage proper lawn management and landscaping, including use of native vegetation. ■ Encourage use of Integrated Pest Management techniques for pest control. ■ Encourage proper onsite recycling of yard trimmings. Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize ■ Product Substitution Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Oxygen Demanding ■ Recycle residual paints, solvents, lumber, and other material as _ much as possible. SQA California Stormwater _1q*Quality Association P WA A P P P January 2003 California Stormwater BMP Handbook 1 of 5 Municipal www.cabmphandbooks.com SC-41 Building & Grounds Maintenance Suggested Protocols Pressure Washing of Buildings, Rooftops, and Other Large Objects ■ In situations where soaps or detergents are used and the surrounding area is paved, pressure washers must use a waste water collection device that enables collection of wash water and associated solids. A sump pump, wet vacuum or similarly effective device must be used to collect the runoff and loose materials. The collected runoff and solids must be disposed of properly. ■ If soaps or detergents are not used, and the surrounding area is paved, wash water runoff does not have to be collected but must be screened. Pressure washers must use filter fabric or some other type of screen on the ground and/or in he catch basin to trap the particles in wash water runoff. ■ If you are pressure washing on a grassed area (with or without soap), runoff must be dispersed as sheet flow as much as possible, rather than as a concentrated stream. The wash runoff must remain on the grass and not drain to pavement. Ensure that this practice does not kill grass. Landscaping Activities ■ Do not apply any chemicals (insecticide, herbicide, or fertilizer) directly to surface waters, unless the application is approved and permitted by the state. ■ Dispose of grass clippings, leaves, sticks, or other collected vegetation as garbage, or by composting. Do not dispose of collected vegetation into waterways or storm drainage systems. ■ Use mulch or other erosion control measures on exposed soils. ■ Check irrigation schedules so pesticides will not be washed away and to minimize non- stormwater discharge. Building Repair, Remodeling, and Construction ■ Do not dump any toxic substance or liquid waste on the pavement, the ground, or toward a storm drain. ■ Use ground or drop cloths underneath outdoor painting, scraping, and sandblasting work, and properly dispose of collected material daily. ■ Use a ground cloth or oversized tub for activities such as paint mixing and tool cleaning. ■ Clean paint brushes and tools covered with water -based paints in sinks connected to sanitary sewers or in portable containers that can be dumped into a sanitary sewer drain. Brushes and tools covered with non -water -based paints, finishes, or other materials must be cleaned in a manner that enables collection of used solvents (e.g., paint thinner, turpentine, etc.) for recycling or proper disposal. 2 of 5 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks. corn Building & Grounds Maintenance SC-41 ■ Use a storm drain cover, filter fabric, or similarly effective runoff control mechanism if dust, grit, wash water, or other pollutants may escape the work area and enter a catch basin. The containment device(s) must be in place at the beginning of the work day, and accumulated dirty runoff and solids must be collected and disposed of before removing the containment device(s) at the end of the work day. ■ If you need to de -water an excavation site, you may need to filter the water before discharging to a catch basin or off -site. In which case you should direct the water through hay bales and filter fabric or use other sediment filters or traps. ■ Store toxic material under cover with secondary containment during precipitation events and when not in use. A cover would include tarps or other temporary cover material. Mowing, Trimming, and Planting ■ Dispose of leaves, sticks, or other collected vegetation as garbage, by composting or at a permitted landfill. Do not dispose of collected vegetation into waterways or storm drainage systems. ■ Use mulch or other erosion control measures when soils are exposed. ■ Place temporarily stockpiled material away from watercourses and drain inlets, and berm or cover stockpiles to prevent material releases to the storm drain system. ■ Consider an alternative approach when bailing out muddy water; do not put it in the storm drain, pour over landscaped areas. ■ Use hand or mechanical weeding where practical. Fertilizer and Pesticide Management ■ Follow all federal, state, and local laws and regulations governing the use, storage, and disposal of fertilizers and pesticides and training of applicators and pest control advisors. ■ Follow manufacturers' recommendations and label directions. Pesticides must never be applied if precipitation is occuring or predicted. Do not apply insecticides within ioo feet of surface waters such as lakes, ponds, wetlands, and streams. ■ Use less toxic pesticides that will do the job, whenever possible. Avoid use of copper -based pesticides if possible. ■ Do not use pesticides if rain is expected. ■ Do not mix or prepare pesticides for application near storm drains. ■ Use the minimum amount needed for the job. ■ Calibrate fertilizer distributors to avoid excessive application. ■ Employ techniques to minimize off -target application (e.g. spray drift) of pesticides, including consideration of alternative application techniques. January 2003 California Stormwater BMP Handbook 3 of 5 Municipal www.cabmphandbooks. corn SC-41 Building & Grounds Maintenance ■ Apply pesticides only when wind speeds are low. ■ Work fertilizers into the soil rather than dumping or broadcasting them onto the surface. ■ Irrigate slowly to prevent runoff and then only as much as is needed. ■ Clean pavement and sidewalk if fertilizer is spilled on these surfaces before applying irrigation water. ■ Dispose of empty pesticide containers according to the instructions on the container label. ■ Use up the pesticides. Rinse containers, and use rinse water as product. Dispose of unused pesticide as hazardous waste. ■ Implement storage requirements for pesticide products with guidance from the local fire department and County Agricultural Commissioner. Provide secondary containment for pesticides. Inspection ■ Inspect irrigation system periodically to ensure that the right amount of water is being applied and that excessive runoff is not occurring. Minimize excess watering, and repair leaks in the irrigation system as soon as they are observed. Training ■ Educate and train employees on use of pesticides and in pesticide application techniques to prevent pollution. ■ Train employees and contractors in proper techniques for spill containment and cleanup. ■ Be sure the frequency of training takes into account the complexity of the operations and the nature of the staff. Spill Response and Prevention ■ Refer to SC-ii, Spill Prevention, Control & Cleanup ■ Keep your Spill Prevention Control and countermeasure (SPCC) plan up-to-date, and implement accordingly. ■ Have spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. Other Considerations ■ Alternative pest/weed controls may not be available, suitable, or effective in many cases. 4 of 5 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks. corn Building & Grounds Maintenance SC-41 Requirements Costs ■ Overall costs should be low in comparison to other BMPs. Maintenance ■ Sweep paved areas regularly to collect loose particles, and wipe up spills with rags and other absorbent material immediately, do not hose down the area to a storm drain. Supplemental Information Further Detail of the BMP Fire Sprinkler Line Flushing Building fire sprinkler line flushing may be a source of non-stormwater runoff pollution. The water entering the system is usually potable water though in some areas it may be non -potable reclaimed wastewater. There are subsequent factors that may drastically reduce the quality of the water in such systems. Black iron pipe is usually used since it is cheaper than potable piping but it is subject to rusting and results in lower quality water. Initially the black iron pipe has an oil coating to protect it from rusting between manufacture and installation; this will contaminate the water from the first flush but not from subsequent flushes. Nitrates, poly- phosphates and other corrosion inhibitors, as well as fire suppressants and antifreeze may be added to the sprinkler water system. Water generally remains in the sprinkler system a long time, typically a year, between flushes and may accumulate iron, manganese, lead, copper, nickel and zinc. The water generally becomes anoxic and contains living and dead bacteria and breakdown products from chlorination. This may result in a significant BOD problem and the water often smells. Consequently dispose fire sprinkler line flush water into the sanitary sewer. Do not allow discharge to storm drain or infiltration due to potential high levels of pollutants in fire sprinkler line water. References and Resources California's Nonpoint Source Program Plan http://www.swrcb.ca.gov/nps/index.html King County - ftp://dnr.metrokc.gov/wlr/dss/spcm/Chapter%203.PDF Orange County Stormwater Program http://www.ocwatersheds.com/StormWater/swp—introduction.asp Mobile Cleaners Pilot Program: Final Report. 1997. Bay Area Stormwater Management Agencies Association (BASSMA) http://www.basmaa.orgl Pollution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies Association (BASMAA) http://www.basmaa.orgZ San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP) - http://www.projectcleanwater.org/pdf/Model% 2oProgram% 2oMunicipal% 2oFacilities.pdf January 2003 California Stormwater BMP Handbook 5 of 5 Municipal www.cabmphandbooks. corn Parking/Storage Area Maintenance SC-43 Description Parking lots and storage areas can contribute a number of substances, such as trash, suspended solids, hydrocarbons, oil and grease, and heavy metals that can enter receiving waters through stormwater runoff or non-stormwater discharges. The following protocols are intended to prevent or reduce the discharge of pollutants from parking/storage areas and include using good housekeeping practices, following appropriate cleaning BMPs, and training employees. Approach Pollution Prevention ■ Encourage alternative designs and maintenance strategies for impervious parking lots. (See New Development and Redevelopment BMP Handbook). ■ Keep accurate maintenance logs to evaluate BMP implementation. Suggested Protocols General ■ Keep the parking and storage areas clean and orderly. Remove debris in a timely fashion. ■ Allow sheet runoff to flow into bioiilters (vegetated strip and swale) and/or infiltration devices. ■ Utilize sand filters or oleophilic collectors for oily waste in low concentrations. Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize ■ Product Substitution Targeted Constituents Sediment ✓ Nutrients ✓ Trash ✓ Metals ✓ Bacteria ✓ Oil and Grease ✓ Organics ✓ Oxygen Demanding ✓ CASQA California Stormwater 1% Quality Association January 2003 California Stormwater BMP Handbook 1 of 4 Municipal www.cabmphandbooks.com SC-43 Parking/Storage Area Maintenance ■ Arrange rooftop drains to prevent drainage directly onto paved surfaces. ■ Design lot to include semi -permeable hardscape. Controlling Litter ■ Post "No Littering" signs and enforce anti -litter laws. ■ Provide an adequate number of litter receptacles. ■ Clean out and cover litter receptacles frequently to prevent spillage. ■ Provide trash receptacles in parking lots to discourage litter. ■ Routinely sweep, shovel and dispose of litter in the trash. Surface cleaning ■ Use dry cleaning methods (e.g. sweeping or vacuuming) to prevent the discharge of pollutants into the stormwater conveyance system. ■ Establish frequency of public parking lot sweeping based on usage and field observations of waste accumulation. ■ Sweep all parking lots at least once before the onset of the wet season. ■ If water is used follow the procedures below: - Block the storm drain or contain runoff. - Wash water should be collected and pumped to the sanitary sewer or discharged to a pervious surface, do not allow wash water to enter storm drains. - Dispose of parking lot sweeping debris and dirt at a landfill. ■ When cleaning heavy oily deposits: - Use absorbent materials on oily spots prior to sweeping or washing. - Dispose of used absorbents appropriately. Surface Repair ■ Pre -heat, transfer or load hot bituminous material away from storm drain inlets. ■ Apply concrete, asphalt, and seal coat during dry weather to prevent contamination form contacting stormwater runoff. ■ Cover and seal nearby storm drain inlets (with waterproof material or mesh) and manholes before applying seal coat, slurry seal, etc., where applicable. Leave covers in place until job is complete and until all water from emulsified oil sealants has drained or evaporated. Clean any debris from these covered manholes and drains for proper disposal. 2 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Parking/Storage Area Maintenance SC-43 ■ Use only as much water as necessary for dust control, to avoid runoff. ■ Catch drips from paving equipment that is not in use with pans or absorbent material placed under the machines. Dispose of collected material and absorbents properly. Inspection ■ Have designated personnel conduct inspections of the parking facilities and stormwater conveyance systems associated with them on a regular basis. ■ Inspect cleaning equipment/sweepers for leaks on a regular basis. Training ■ Provide regular training to field employees and/or contractors regarding cleaning of paved areas and proper operation of equipment. ■ Train employees and contractors in proper techniques for spill containment and cleanup. Spill Response and Prevention ■ Refer to SC-ii, Spill Prevention, Control & Cleanup. ■ Keep your Spill Prevention Control and countermeasure (SPCC) plan up-to-date, nad implement accordingly. ■ Have spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. Other Considerations ■ Limitations related to sweeping activities at large parking facilities may include high equipment costs, the need for sweeper operator training, and the inability of current sweeper technology to remove oil and grease. Requirements Costs Cleaning/sweeping costs can be quite large, construction and maintenance of stormwater structural controls can be quite expensive as well. Maintenance ■ Sweep parking lot to minimize cleaning with water. ■ Clean out oil/water/sand separators regularly, especially after heavy storms. ■ Clean parking facilities on a regular basis to prevent accumulated wastes and pollutants from being discharged into conveyance systems during rainy conditions. January 2003 California Stormwater BMP Handbook 3 of 4 Municipal www.cabmphandbooks. corn SC-43 Parking/Storage Area Maintenance Supplemental Information Further Detail of the BMP Surface Repair Apply concrete, asphalt, and seal coat during dry weather to prevent contamination form contacting stormwater runoff. Where applicable, cover and seal nearby storm drain inlets (with waterproof material or mesh) and manholes before applying seal coat, slurry seal, etc. Leave covers in place until job is complete and until all water from emulsified oil sealants has drained or evaporated. Clean any debris from these covered manholes and drains for proper disposal. Use only as much water as necessary for dust control, to avoid runoff. References and Resources http://www.stormwatercenter.net/ California's Nonpoint Source Program Plan http://www.swrcb.ca.gov/nps/index.html Model Urban Runoff Program: A How -To Guide for Developing Urban Runoff Programs for Small Municipalities. Prepared by City of Monterey, City of Santa Cruz, California Coastal Commission, Monterey Bay National Marine Sanctuary, Association of Monterey Bay Area Governments, Woodward -Clyde, Central Coast Regional Water Quality control Board. July 1998 (Revised February 2002 by the California Coastal Commission). Orange County Stormwater Program http://www.ocwatersheds.com/StormWater/swp—introduction.asp Oregon Association of Clean Water Agencies. Oregon Municipal Stormwater Toolbox for Maintenance Practices. June 1998. Pollution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies Association (BASMAA) http://www.basma.org San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP) http: / lwww.projectcleanwater.org/pdf/Model% 2oProgram% 2oMunicipal% 2oFacilities.pdf 4 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks. corn Housekeeping Practices SC-60 Description objectives Promote efficient and safe housekeeping practices (storage, use, ■ Cover and cleanup) when handling potentially harmful materials such ■ Contain as fertilizers, pesticides, cleaning solutions, paint products, ■ Educate automotive products, and swimming pool chemicals. Related . Reduce/Minimize information is provided in BMP fact sheets SC-ii Spill Prevention, Control & Cleanup and SC-34 Waste Handling & ■ Product Substitution Disposal. Approach Pollution Prevention ■ Purchase only the amount of material that will be needed for foreseeable use. In most cases this will result in cost savings in both purchasing and disposal. See SC-61 Safer Alternative Products for additional information. ■ Be aware of new products that may do the same job with less environmental risk and for less or the equivalent cost. Total Targeted Constituents cost must be used here; this includes purchase price, Sediment transportation costs, storage costs, use related costs, clean up Nutrients costs and disposal costs. Trash Suggested Protocols Metals General Bacteria Oil and Grease 0 ■ Keep work sites clean and orderly. Remove debris in a timely Organics p fashion. Sweep the area. Oxygen Demanding ■ Dispose of wash water, sweepings, and sediments, properly. ■ Recycle or dispose of fluids properly. ■ Establish a daily checklist of office, yard and plant areas to confirm cleanliness and adherence to proper storage and security. Specific employees should be assigned specific inspection responsibilities and given the authority to remedy any problems found. ■ Post waste disposal charts in appropriate locations detailing for each waste its hazardous nature (poison, corrosive, flammable), prohibitions on its disposal (dumpster, drain, sewer) and the recommended disposal method (recycle, sewer, burn, storage, landfill). ■ Summarize the chosen BMPs applicable to your operation and post them in appropriate conspicuous places. ag, January 2003 California Stormwater BMP Handbook 1 of 3 Municipal www.cabmphandbooks.com SC-60 Housekeeping Practices ■ Require a signed checklist from every user of any hazardous material detailing amount taken, amount used, amount returned and disposal of spent material. ■ Do a before audit of your site to establish baseline conditions and regular subsequent audits to note any changes and whether conditions are improving or deteriorating. ■ Keep records of water, air and solid waste quantities and quality tests and their disposition. ■ Maintain a mass balance of incoming, outgoing and on hand materials so you know when there are unknown losses that need to be tracked down and accounted for. ■ Use and reward employee suggestions related to BMPs, hazards, pollution reduction, work place safety, cost reduction, alternative materials and procedures, recycling and disposal. ■ Have, and review regularly, a contingency plan for spills, leaks, weather extremes etc. Make sure all employees know about it and what their role is so that it comes into force automatically. 7"raining ■ Train all employees, management, office, yard, manufacturing, field and clerical in BMPs and pollution prevention and make them accountable. ■ Train municipal employees who handle potentially harmful materials in good housekeeping practices. ■ Train personnel who use pesticides in the proper use of the pesticides. The California Department of Pesticide Regulation license pesticide dealers, certify pesticide applicators and conduct onsite inspections. ■ Train employees and contractors in proper techniques for spill containment and cleanup. The employee should have the tools and knowledge to immediately begin cleaning up a spill if one should occur. Spilt Response and Prevention ■ Refer to SC-ii, Spill Prevention, Control & Cleanup. ■ Keep your Spill Prevention Control and Countermeasure (SPCC) plant up-to-date, and implement accordingly. ■ Have spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. Other Considerations ■ There are no major limitations to this best management practice. ■ There are no regulatory requirements to this BMP. Existing regulations already require municipalities to properly store, use, and dispose of hazardous materials 2 of 3 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Safer Alternative Products SC-61 Descriptions Objectives Promote the use of less harmful products. Alternatives exist for ■ Educate most product classes including chemical fertilizers, pesticides, ■ Reduce/Minimize cleaning solutions, janitorial chemicals, automotive and paint ■ Product Substitution products, and consumables (batteries, fluorescent lamps). Approach Develop a comprehensive program based on: ■ The "Precautionary Principle," which is an alternative to the "Risk Assessment" model that says it's acceptable to use a potentially harmful product until physical evidence of its harmful effects are established and deemed too costly from an environmental or public health perspective. For instance, a risk assessment approach might say it's acceptable to use a pesticide until there is direct proof of an environmental impact. The Precautionary Principle approach is used to evaluate whether a given product is safe, whether it is really Targeted Constituents necessary, and whether alternative products would perform just as well. Sediment Nutrients Q ■ Environmentally Preferable Purchasing Program to minimize Trash the purchase of products containing hazardous ingredients Metals Q used in the facility's custodial services, fleet maintenance, Bacteria and facility maintenance in favor of using alternate products Oil and Grease Q that pose less risk to employees and to the environment. Organics Q ■ Integrated Pest Management (IPM) or Less -Toxic Pesticide Oxygen Demanding Program, which uses a pest management approach that minimizes the use of toxic chemicals and gets rid of pests by methods that pose a lower risk to employees, the public, and the environment. ■ Energy Efficiency Program including no -cost and low-cost energy conservation and efficiency actions that can reduce both energy consumption and electricity bills, along with long-term energy efficiency investments. Consider the following mechanisms for developing and implementing a comprehensive program: ■ Policies ■ Procedures - Standard operating procedures (SOPs) - Purchasing guidelines and procedures &gA January 2003 California Stormwater BMP Handbook 1 of 4 Municipal www.cabmphandbooks.com SC-61 Safer Alternative Products - Bid packages (services and supplies) ■ Materials - Preferred or approved product and supplier lists - Product and supplier evaluation criteria - Training sessions and manuals - Fact sheets for employees Training ■ Employees who handle potentially harmful materials in the use of safer alternatives. ■ Purchasing departments should be encouraged to procure less hazardous materials and products that contain little or no harmful substances or TMDL pollutants. Regulations This BMP has no regulatory requirements. Existing regulations already encourage facilities to reduce the use of hazardous materials through incentives such as reduced: ■ Specialized equipment storage and handling requirements, ■ Stormwater runoff sampling requirements, ■ Training and licensing requirements, and ■ Record keeping and reporting requirements. Equipment ■ There are no major equipment requirements to this BMP. Limitations ■ Alternative products may not be available, suitable, or effective in every case. Requirements Costs ■ The primary cost is for staff time to: 1) develop new policies and procedures and 2) educate purchasing departments and employees who handle potentially harmful materials about the availability, procurement, and use of safer alternatives. ■ Some alternative products may be slightly more expensive than conventional products. Supplemental Information Employees and contractors / service providers can both be educated about safer alternatives by using information developed by a number of organizations including the references and resources listed below. 2 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Safer Alternative Products SC-61 The following discussion provides some general information on safer alternatives. More specific information on particular hazardous materials and the available alternatives may be found in the references and resources listed below. ■ Automotive products — Less toxic alternatives are not available for many automotive products, especially engine fluids. But there are alternatives to grease lubricants, car polishes, degreasers, and windshield washer solution. Rerefined motor oil is also available. ■ Vehicle/Trailer lubrication — Fifth wheel bearings on trucks require routine lubrication. Adhesive lubricants are available to replace typical chassis grease. ■ Cleaners — Vegetables -based or citrus -based soaps are available to replace petroleum -based soaps/detergents. ■ Paint products — Water -based paints, wood preservatives, stains, and finishes are available. ■ Pesticides — Specific alternative products or methods exist to control most insects, fungi, and weeds. ■ Chemical Fertilizers — Compost and soil amendments are natural alternatives. ■ Consumables — Manufacturers have either reduced or are in the process of reducing the amount of heavy metals in consumables such as batteries and fluorescent lamps. All fluorescent lamps contain mercury, however low -mercury containing lamps are now available from most hardware and lighting stores. Fluorescent lamps are also more energy efficient than the average incandescent lamp. ■ Janitorial chemicals — Even biodegradable soap can harm fish and wildlife before it biodegrades. Biodegradable does not mean non -toxic. Safer products and procedures are available for floor stripping and cleaning, as well as carpet, glass, metal, and restroom cleaning and disinfecting. Examples There are a number of business and trade associations, and communities with effective programs. Some of the more prominent are listed below in the references and resources section. References and Resources Note: Many of these references provide alternative products for materials that typically are used inside and disposed to the sanitary sewer as well as alternatives to products that usually end up in the storm drain. General Sustainable Practices and Pollution Prevention Including Pollutant - Specific Information California Department of Toxic Substances Control (www.dtse.ca.gov) California Integrated Waste Management Board (www.ciwmb.ca.gov) City of Santa Monica (www.santa-monica.org/environment) City of Palo Alto (www.city.palo-alto.ca.us/cleanbay) January 2003 California Stormwater BMP Handbook 3 of 4 Municipal www.cabmphandbooks.com SC-61 Safer Alternative Products City and County of San Francisco, Department of the Environment (www.ci.sf.ca.us/sfenvironment) Earth 911(www.earthgll.org/master.asp) Environmental Finance Center Region IX (www.greenstart.org/efcg) Flex Your Power (www.flexyourpower.ca.gov) GreenBiz.com (www.greenbiz.com) Green Business Program (www.abag.org/bayarea/enviro/gbus/gb.html) Pacific Industrial and Business Association (www.piba.org) Sacramento Clean Water Business Partners (www.saestormwater.org) USEPA BMP fact sheet — Alternative products (http://cfpub.epa.gov/npdes/stormwater/menuofbmps/poll-2.cfin) USEPA Region IX Pollution Prevention Program (www.epa.gov/region09/p2) Western Regional Pollution Prevention Network (www.westp2net.org) Metals (mercury, copper) National Electrical Manufacturers Association - Environment, Health and Safety (www.nema.org) Sustainable Conservation (www.suscon.org) Auto Recycling Project Brake Pad Partnership Pesticides and Chemical Fertilizers Bio-Integral Resource Center (www.birc.org) California Department of Pesticide Regulation (www.edpr.ca.gov) University of California Statewide IPM Program (www.ipm.ucdavis.edu/default.html) Dioxins Bay Area Dioxins Project (http://dioxin.abag.ca.gov/) 4 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Road and Street Maintenance Description Streets, roads, and highways are significant sources of pollutants in stormwater discharges, and operation and maintenance (O&M) practices, if not conducted properly, can contribute to the problem. Stormwater pollution from roadway and bridge maintenance should be addressed on a site -specific basis. Use of the procedures outlined below, that address street sweeping and repair, bridge and structure maintenance, and unpaved roads will reduce pollutants in stormwater. Approach Pollution Prevention ■ Use the least toxic materials available (e.g. water based paints, gels or sprays for graffiti removal) ■ Recycle paint and other materials whenever possible. ■ Enlist the help of citizens to keep yard waste, used oil, and other wastes out of the gutter. Suggested Protocols Street Sweeping and Cleaning ■ Maintain a consistent sweeping schedule. Provide minimum monthly sweeping of curbed streets. ■ Perform street cleaning during dry weather if possible. SC-70 Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize ■ Product Substitution Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Oxygen Demanding F&I 0 ag, January 2003 California Stormwater BMP Handbook 1 of 9 Municipal www.cabmphandbooks.com SC-70 Road and Street Maintenance ■ Avoid wet cleaning or flushing of street, and utilize dry methods where possible. ■ Consider increasing sweeping frequency based on factors such as traffic volume, land use, field observations of sediment and trash accumulation, proximity to water courses, etc. For example: - Increase the sweeping frequency for streets with high pollutant loadings, especially in high traffic and industrial areas. - Increase the sweeping frequency just before the wet season to remove sediments accumulated during the summer. - Increase the sweeping frequency for streets in special problem areas such as special events, high litter or erosion zones. ■ Maintain cleaning equipment in good working condition and purchase replacement equipment as needed. Old sweepers should be replaced with new technologically advanced sweepers (preferably regenerative air sweepers) that maximize pollutant removal. ■ Operate sweepers at manufacturer requested optimal speed levels to increase effectiveness. ■ To increase sweeping effectiveness consider the following: - Institute a parking policy to restrict parking in problematic areas during periods of street sweeping. - Post permanent street sweeping signs in problematic areas; use temporary signs if installation of permanent signs is not possible. - Develop and distribute flyers notifying residents of street sweeping schedules. ■ Regularly inspect vehicles and equipment for leaks, and repair immediately. ■ If available use vacuum or regenerative air sweepers in the high sediment and trash areas (typically industrial/commercial). ■ Keep accurate logs of the number of curb -miles swept and the amount of waste collected. ■ Dispose of street sweeping debris and dirt at a landfill. ■ Do not store swept material along the side of the street or near a storm drain inlet. ■ Keep debris storage to a minimum during the wet season or make sure debris piles are contained (e.g. by berming the area) or covered (e.g. with tarps or permanent covers). Street Repair and Maintenance Pavement marking in Schedule pavement marking activities for dry weather. 2 of 9 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Road and Street Maintenance SC-70 ■ Develop paint handling procedures for proper use, storage, and disposal of paints. ■ Transfer and load paint and hot thermoplastic away from storm drain inlets. ■ Provide drop cloths and drip pans in paint mixing areas. ■ Properly maintain application equipment. ■ Street sweep thermoplastic grindings. Yellow thermoplastic grindings may require special handling as they may contain lead. ■ Paints containing lead or tributyltin are considered a hazardous waste and must be disposed of properly. ■ Use water based paints whenever possible. If using water based paints, clean the application equipment in a sink that is connected to the sanitary sewer. ■ Properly store leftover paints if they are to be kept for the next job, or dispose of properly. Concrete installation and repair ■ Schedule asphalt and concrete activities for dry weather. ■ Take measures to protect any nearby storm drain inlets and adjacent watercourses, prior to breaking up asphalt or concrete (e.g. place san bags around inlets or work areas). ■ Limit the amount of fresh concrete or cement mortar mixed, mix only what is needed for the job. ■ Store concrete materials under cover, away from drainage areas. Secure bags of cement after they are open. Be sure to keep wind-blown cement powder away from streets, gutters, storm drains, rainfall, and runoff. ■ Return leftover materials to the transit mixer. Dispose of small amounts of hardened excess concrete, grout, and mortar in the trash. ■ Do not wash sweepings from exposed aggregate concrete into the street or storm drain. Collect and return sweepings to aggregate base stockpile, or dispose in the trash. ■ When making saw cuts in pavement, use as little water as possible and perform during dry weather. Cover each storm drain inlet completely with filter fabric or plastic during the sawing operation and contain the slurry by placing straw bales, sandbags, or gravel dams around the inlets. After the liquid drains or evaporates, shovel or vacuum the slurry residue from the pavement or gutter and remove from site. Alternatively, a small onsite vacuum may be used to pick up the slurry as this will prohibit slurry from reaching storm drain inlets. ■ Wash concrete trucks off site or in designated areas on site designed to preclude discharge of wash water to drainage system. January 2003 California Stormwater BMP Handbook 3 of 9 Municipal www.cabmphandbooks.com SC-70 Road and Street Maintenance Patching, resurfacing, and surface sealing ■ Schedule patching, resurfacing and surface sealing for dry weather. ■ Stockpile materials away from streets, gutter areas, storm drain inlets or watercourses. During wet weather, cover stockpiles with plastic tarps or berm around them if necessary to prevent transport of materials in runoff. ■ Pre -heat, transfer or load hot bituminous material away from drainage systems or watercourses. ■ Where applicable, cover and seal nearby storm drain inlets (with waterproof material or mesh) and maintenance holes before applying seal coat, slurry seal, etc. Leave covers in place until job is complete and until all water from emulsified oil sealants has drained or evaporated. Clean any debris from covered maintenance holes and storm drain inlets when the job is complete. ■ Prevent excess material from exposed aggregate concrete or similar treatments from entering streets or storm drain inlets. Designate an area for clean up and proper disposal of excess materials. ■ Use only as much water as necessary for dust control, to avoid runoff. ■ Sweep, never hose down streets to clean up tracked dirt. Use a street sweeper or vacuum truck. Do not dump vacuumed liquid in storm drains. ■ Catch drips from paving equipment that is not in use with pans or absorbent material placed under the machines. Dispose of collected material and absorbents properly. Equipment cleaning maintenance and storage ■ Inspect equipment daily and repair any leaks. Place drip pans or absorbent materials under heavy equipment when not in use. ■ Perform major equipment repairs at the corporation yard, when practical. ■ If refueling or repairing vehicles and equipment must be done onsite, use a location away from storm drain inlets and watercourses. ■ Clean equipment including sprayers, sprayer paint supply lines, patch and paving equipment, and mud jacking equipment at the end of each day. Clean in a sink or other area (e.g. vehicle wash area) that is connected to the sanitary sewer. Bridge and Structure Maintenance Paint and Paint Removal in Transport paint and materials to and from job sites in containers with secure lids and tied down to the transport vehicle. in Do not transfer or load paint near storm drain inlets or watercourses. 4 of 9 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Road and Street Maintenance SC-70 ■ Test and inspect spray equipment prior to starting to paint. Tighten all hoses and connections and do not overfill paint container. ■ Plug nearby storm drain inlets prior to starting painting where there is significant risk of a spill reaching storm drains. Remove plugs when job is completed. ■ If sand blasting is used to remove paint, cover nearby storm drain inlets prior to starting work. ■ Perform work on a maintenance traveler or platform, or use suspended netting or tarps to capture paint, rust, paint removing agents, or other materials, to prevent discharge of materials to surface waters if the bridge crosses a watercourse. If sanding, use a sander with a vacuum filter bag. ■ Capture all clean-up water, and dispose of properly. ■ Recycle paint when possible (e.g. paint may be used for graffiti removal activities). Dispose of unused paint at an appropriate household hazardous waste facility. Graffiti Removal ■ Schedule graffiti removal activities for dry weather. ■ Protect nearby storm drain inlets prior to removing graffiti from walls, signs, sidewalks, or other structures needing graffiti abatement. Clean up afterwards by sweeping or vacuuming thoroughly, and/or by using absorbent and properly disposing of the absorbent. ■ When graffiti is removed by painting over, implement the procedures under Painting and Paint Removal above. ■ Direct runoff from sand blasting and high pressure washing (with no cleaning agents) into a landscaped or dirt area. If such an area is not available, filter runoff through an appropriate filtering device (e.g. filter fabric) to keep sand, particles, and debris out of storm drains. ■ If a graffiti abatement method generates wash water containing a cleaning compound (such as high pressure washing with a cleaning compound), plug nearby storm drains and vacuum/pump wash water to the sanitary sewer. ■ Consider using a waterless and non -toxic chemical cleaning method for graffiti removal (e.g. gels or spray compounds). Repair Work in Prevent concrete, steel, wood, metal parts, tools, or other work materials from entering storm drains or watercourses. ■ Thoroughly clean up the job site when the repair work is completed. ■ When cleaning guardrails or fences follow the appropriate surface cleaning methods (depending on the type of surface) outlined in SC-71 Plaza & Sidewalk Cleaning fact sheet. January 2003 California Stormwater BMP Handbook 5 of 9 Municipal www.cabmphandbooks.com SC-70 Road and Street Maintenance ■ If painting is conducted, follow the painting and paint removal procedures above. ■ If graffiti removal is conducted, follow the graffiti removal procedures above. ■ If construction takes place, see the Construction ActiAty BMP Handbook. ■ Recycle materials whenever possible. Unpaved Roads and Trails ■ Stabilize exposed soil areas to prevent soil from eroding during rain events. This is particularly important on steep slopes. ■ For roadside areas with exposed soils, the most cost-effective choice is to vegetate the area, preferably with a mulch or binder that will hold the soils in place while the vegetation is establishing. Native vegetation should be used if possible. ■ If vegetation cannot be established immediately, apply temporary erosion control mats/blankets; a comma straw, or gravel as appropriate. ■ If sediment is already eroded and mobilized in roadside areas, temporary controls should be installed. These may include: sediment control fences, fabric -covered triangular dikes, gravel -filled burlap bags, biobags, or hay bales staked in place. Non-Stormwater Discharges Field crews should be aware of non-stormwater discharges as part of their ongoing street maintenance efforts. ■ Refer to SC-10 Non-Stormwater Discharges ■ Identify location, time and estimated quantity of discharges. ■ Notify appropriate personnel. Training ■ Train employees regarding proper street sweeping operation and street repair and maintenance. ■ Instruct employees and subcontractors to ensure that measures to reduce the stormwater impacts of roadway/bridge maintenance are being followed. ■ Require engineering staff and/or consulting A/E firms to address stormwater quality in new bridge designs or existing bridge retrofits. ■ Use a training log or similar method to document training. ■ Train employees on proper spill containment and clean up, and in identifying non- stormwater discharges. 6 of 9 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Road and Street Maintenance SC-70 SpiU Response and Prevention ■ Refer to SC-1i, Spill Prevention, Control & Cleanup. ■ Keep your Spill Prevention Control and countermeasure (SPCC) plan up-to-date, and implement accordingly. ■ Have spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. Other Considerations ■ Densely populated areas or heavily used streets may require parking regulations to clear streets for cleaning. ■ No currently available conventional sweeper is effective at removing oil and grease. Mechanical sweepers are not effective at removing finer sediments. ■ Limitations may arise in the location of new bridges. The availability and cost of land and other economic and political factors may dictate where the placement of a new bridge will occur. Better design of the bridge to control runoff is required if it is being placed near sensitive waters. Requirements Costs ■ The maintenance of local roads and bridges is already a consideration of most community public works or transportation departments. Therefore, the cost of pollutant reducing management practices will involve the training and equipment required to implement these new practices. ■ The largest expenditures for street sweeping programs are in staffing and equipment. The capital cost for a conventional street sweeper is between $6o,000 and $120,000. Newer technologies might have prices approaching $18o,000. The average useful life of a conventional sweeper is about four years, and programs must budget for equipment replacement. Sweeping frequencies will determine equipment life, so programs that sweep more often should expect to have a higher cost of replacement. ■ A street sweeping program may require the following. - Sweeper operators, maintenance, supervisory, and administrative personnel are required. - Traffic control officers may be required to enforce parking restrictions. - Skillful design of cleaning routes is required for program to be productive. - Arrangements must be made for disposal of collected wastes. January 2003 California Stormwater BMP Handbook 7 of 9 Municipal www.cabmphandbooks.com SC-70 Road and Street Maintenance ■ If investing in newer technologies, training for operators must be included in operation and maintenance budgets. Costs for public education are small, and mostly deal with the need to obey parking restrictions and litter control. Parking tickets are an effective reminder to obey parking rules, as well as being a source of revenue. Maintenance ■ Not applicable Supplemental Information Further Detail of the BMP Street sweeping There are advantages and disadvantages to the two common types of sweepers. The best choice depends on your specific conditions. Many communities find it useful to have a compliment of both types in their fleet. Mechanical Broom Sweepers - More effective at picking up large debris and cleaning wet streets. Less costly to purchase and operate. Create more airborne dust. Vacuum Sweepers - More effective at removing fine particles and associated heavy metals. Ineffective at cleaning wet streets. Noisier than mechanical broom sweepers which may restrict areas or times of operation. May require an advance vehicle to remove large debris. Street Rushers - Not affected by biggest interference to cleaning, parked cars. May remove finer sediments, moving them toward the gutter and stormwater inlets. For this reason, flushing fell out of favor and is now used primarily after sweeping. Flushing may be effective for combined sewer systems. Presently street flushing is not allowed under most NPDES permits. Cross -Media Transfer of Pollutants The California Air Resources Board (ARB) has established state ambient air quality standards including a standard for respirable particulate matter (less than or equal to io microns in diameter, symbolized as PM1o). In the effort to sweep up finer sediments to remove attached heavy metals, municipalities should be aware that fine dust, that cannot be captured by the sweeping equipment and becomes airborne, could lead to issues of worker and public safety. Bridges Bridges that carry vehicular traffic generate some of the more direct discharges of runoff to surface waters. Bridge scupper drains cause a direct discharge of stormwater into receiving waters and have been shown to carry relatively high concentrations of pollutants. Bridge maintenance also generates wastes that may be either directly deposited to the water below or carried to the receiving water by stormwater. The following steps will help reduce the stormwater impacts of bridge maintenance: ■ Site new bridges so that significant adverse impacts to wetlands, sensitive areas, critical habitat, and riparian vegetation are minimized. 8 of 9 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com SC-73 Landscape Maintenance ■ Consider grass cycling (grass cycling is the natural recycling of grass by leaving the clippings on the lawn when mowing. Grass clippings decompose quickly and release valuable nutrients back into the lawn). Suggested Protocols Jlfoiving, Trimming, and Weeding ■ Whenever possible use mechanical methods of vegetation removal (e.g mowing with tractor - type or push mowers, hand cutting with gas or electric powered weed trimmers) rather than applying herbicides. Use hand weeding where practical. ■ Avoid loosening the soil when conducting mechanical or manual weed control, this could lead to erosion. Use mulch or other erosion control measures when soils are exposed. ■ Performing mowing at optimal times. Mowing should not be performed if significant rain events are predicted. ■ Mulching mowers may be recommended for certain flat areas. Other techniques may be employed to minimize mowing such as selective vegetative planting using low maintenance grasses and shrubs. ■ Collect lawn and garden clippings, pruning waste, tree trimmings, and weeds. Chip if necessary, and compost or dispose of at a landfill (see waste management section of this fact sheet). ■ Place temporarily stockpiled material away from watercourses, and berm or cover stockpiles to prevent material releases to storm drains. Planting in Determine existing native vegetation features (location, species, size, function, importance) and consider the feasibility of protecting them. Consider elements such as their effect on drainage and erosion, hardiness, maintenance requirements, and possible conflicts between preserving vegetation and the resulting maintenance needs. ■ Retain and/or plant selected native vegetation whose features are determined to be beneficial, where feasible. Native vegetation usually requires less maintenance (e.g., irrigation, fertilizer) than planting new vegetation. ■ Consider using low water use groundcovers when planting or replanting. Waste Management ■ Compost leaves, sticks, or other collected vegetation or dispose of at a permitted landfill. Do not dispose of collected vegetation into waterways or storm drainage systems. ■ Place temporarily stockpiled material away from watercourses and storm drain inlets, and berm or cover stockpiles to prevent material releases to the storm drain system. ■ Reduce the use of high nitrogen fertilizers that produce excess growth requiring more frequent mowing or trimming. 2 of 6 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Landscape Maintenance SC-73 ■ Avoid landscape wastes in and around storm drain inlets by either using bagging equipment or by manually picking up the material. Irrigation • Where practical, use automatic timers to minimize runoff. ■ Use popup sprinkler heads in areas with a lot of activity or where there is a chance the pipes may be broken. Consider the use of mechanisms that reduce water flow to sprinkler heads if broken. ■ Ensure that there is no runoff from the landscaped area(s) if re-claimed water is used for irrigation. ■ If bailing of muddy water is required (e.g. when repairing a water line leak), do not put it in the storm drain; pour over landscaped areas. ■ Irrigate slowly or pulse irrigate to prevent runoff and then only irrigate as much as is needed. ■ Apply water at rates that do not exceed the infiltration rate of the soil. Fertilizer and Pesticide Management ■ Utilize a comprehensive management system that incorporates integrated pest management (IPM) techniques. There are many methods and types of IPM, including the following: - Mulching can be used to prevent weeds where turf is absent, fencing installed to keep rodents out, and netting used to keep birds and insects away from leaves and fruit. - Visible insects can be removed by hand (with gloves or tweezers) and placed in soapy water or vegetable oil. Alternatively, insects can be sprayed off the plant with water or in some cases vacuumed off of larger plants. - Store-bought traps, such as species -specific, pheromone -based traps or colored sticky cards, can be used. - Slugs can be trapped in small cups filled with beer that are set in the ground so the slugs can get in easily. - In cases where microscopic parasites, such as bacteria and fungi, are causing damage to plants, the affected plant material can be removed and disposed of (pruning equipment should be disinfected with bleach to prevent spreading the disease organism). - Small mammals and birds can be excluded using fences, netting, tree trunk guards. - Beneficial organisms, such as bats, birds, green lacewings, ladybugs, praying mantis, ground beetles, parasitic nematodes, trichogramma wasps, seed head weevils, and spiders that prey on detrimental pest species can be promoted. ■ Follow all federal, state, and local laws and regulations governing the use, storage, and disposal of fertilizers and pesticides and training of applicators and pest control advisors. January 2003 California Stormwater BMP Handbook 3 of 6 Municipal www.cabmphandbooks.com SC-73 Landscape Maintenance ■ Use pesticides only if there is an actual pest problem (not on a regular preventative schedule). ■ Do not use pesticides if rain is expected. Apply pesticides only when wind speeds are low (less than 5 mph). ■ Do not mix or prepare pesticides for application near storin drains. ■ Prepare the minimum amount of pesticide needed for the job and use the lowest rate that will effectively control the pest. ■ Employ techniques to minimize off -target application (e.g. spray drift) of pesticides, including consideration of alternative application techniques. ■ Fertilizers should be worked into the soil rather than dumped or broadcast onto the surface. ■ Calibrate fertilizer and pesticide application equipment to avoid excessive application. ■ Periodically test soils for determining proper fertilizer use. ■ Sweep pavement and sidewalk if fertilizer is spilled on these surfaces before applying irrigation water. in Purchase only the amount of pesticide that you can reasonably use in a given time period (month or year depending on the product). ■ 'Triple rinse containers, and use rinse water as product. Dispose of unused pesticide as hazardous waste. ■ Dispose of empty pesticide containers according to the instructions on the container label. Inspection ■ Inspect irrigation system periodically to ensure that the right amount of water is being applied and that excessive runoff is not occurring. Minimize excess watering, and repair leaks in the irrigation system as soon as they are observed. ■ Inspect pesticide/fertilizer equipment and transportation vehicles daily. Training ■ Educate and train employees on use of pesticides and in pesticide application techniques to prevent pollution. Pesticide application must be under the supervision of a California qualified pesticide applicator. ■ Vain/encourage municipal maintenance crews to use IPM techniques for managing public green areas. ■ Annually train employees within departments responsible for pesticide application on the appropriate portions of the agency's IPM Policy, SOPs, and BMPs, and the latest IPM techniques. 4 of 6 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Landscape Maintenance SC-73 ■ Employees who are not authorized and trained to apply pesticides should be periodically (at least annually) informed that they cannot use over-the-counter pesticides in or around the workplace. ■ Use a training log or similar method to document training. Spill Response and Prevention ■ Refer to SC-ii, Spill Prevention, Control & Cleanup ■ Have spill cleanup materials readily available and in a know in location ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. Other Considerations ■ The Federal Pesticide, Fungicide, and Rodenticide Act and California Title 3, Division 6, Pesticides and Pest Control Operations place strict controls over pesticide application and handling and specify training, annual refresher, and testing requirements. The regulations generally cover: a list of approved pesticides and selected uses, updated regularly; general application information; equipment use and maintenance procedures; and record keeping. The California Department of Pesticide Regulations and the County Agricultural Commission coordinate and maintain the licensing and certification programs. All public agency employees who apply pesticides and herbicides in "agricultural use" areas such as parks, golf courses, rights -of -way and recreation areas should be properly certified in accordance with state regulations. Contracts for landscape maintenance should include similar requirements. ■ All employees who handle pesticides should be familiar with the most recent material safety data sheet (MSDS) files. ■ Municipalities do not have the authority to regulate the use of pesticides by school districts, however the California Healthy Schools Act of 2000 (AB 226o) has imposed requirements on California school districts regarding pesticide use in schools. Posting of notification prior to the application of pesticides is now required, and IPM is stated as the preferred approach to pest management in schools. Requirements Costs Additional training of municipal employees will be required to address IPM techniques and BMPs. IPM methods will likely increase labor cost for pest control which may be offset by lower chemical costs. Maintenance Not applicable January 2003 California Stormwater BMP Handbook 5 of 6 Municipal www.cabmphandbooks.com SC-73 Landscape Maintenance Supplemental Information Further Detail of the BMP Waste Management Composting is one of the better disposal alternatives if locally available. Most municipalities either have or are planning yard waste composting facilities as a means of reducing the amount of waste going to the landfill. Lawn clippings from municipal maintenance programs as well as private sources would probably be compatible with most composting facilities Contractors and Other Pesticide Users Municipal agencies should develop and implement a process to ensure that any contractor employed to conduct pest control and pesticide application on municipal property engages in pest control methods consistent with the IPM Policy adopted by the agency. Specifically, municipalities should require contractors to follow the agency's IPM policy, SOPS, and BMPs; provide evidence to the agency of having received training on current IPM techniques when feasible; provide documentation of pesticide use on agency property to the agency in a timely manner. References and Resources King County Stormwater Pollution Control Manual. Best Management Practices for Businesses. 1995• King County Surface Water Management. July. On-line: http://dnr.metroke.gov/wlrldss/sp!cm.htm Los Angeles County Stormwater Quality Model Programs. Public Agency Activities hU: / /lad�rg jwmd jnpc es jmodel links.cfin Model Urban Runoff Program: A How -To Guide for Developing Urban Runoff Programs for Small Municipalities. Prepared by City of Monterey, City of Santa Cruz, California Coastal Commission, Monterey Bay National Marine Sanctuary, Association of Monterey Bay Area Governments, Woodward -Clyde, Central Coast Regional Water Quality Control Board. July. 1998. Orange County Stormwater Program htttp://ww,%v.ocwatersheds.com/StormWater/s%,3 introduction.asp Santa Clara Valley Urban Runoff Pollution Prevention Program. 1997 Urban Runoff Management Plan. September 1997, updated October 2000. United States Environmental Protection Agency (USEPA). 2002. Pollution Prevention/Good Housekeeping for Municipal Operations Landscaping and Lawn Care. Office of Water. Office of Wastewater Management. On-line: httl2://www.el)a,govjnp&sjmenuofbmps/roll 8.htm 6 of 6 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Drainage System Maintenance SC-74 Photo Credit: Geoff Brosseau Description As a consequence of its function, the stormwater conveyance system collects and transports urban runoff that may contain certain pollutants. Maintaining catch basins, stormwater inlets, and other stormwater conveyance structures on a regular basis will remove pollutants, prevent clogging of the downstream conveyance system, restore catch basins' sediment trapping capacity, and ensure the system functions properly- hydraulically to avoid flooding. Approach Suggested Protocols Catch Basins/Inlet Structures in Municipal staff should regularly inspect facilities to ensure the following: - Immediate repair of any deterioration threatening structural integrity. - Cleaning before the sump is 40% full. Catch basins should be cleaned as frequently as needed to meet this standard. - Stenciling of catch basins and inlets (see SC-75 Waste Handling and Disposal). ■ Clean catch basins, storm drain inlets, and other conveyance structures in high pollutant load areas just before the wet season to remove sediments and debris accumulated during the summer. Objectives ■ Contain ■ Educate ■ Reduce/Minimize Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Oxygen Demanding &9A January 2003 California Stormwater BMP Handbook 1 of 9 Municipal www.cabmphandbooks.com SC-74 Drainage System Maintenance ■ Conduct inspections more frequently during the wet season for problem areas where sediment or trash accumulates more often. Clean and repair as needed. ■ Keep accurate logs of the number of catch basins cleaned. ■ Record the amount of waste collected. ■ Store wastes collected from cleaning activities of the drainage system in appropriate containers or temporary storage sites in a manner that prevents discharge to the storm drain. ■ Dewater the wastes with outflow into the sanitary sewer if permitted. Water should be treated with an appropriate filtering device prior to discharge to the sanitary sewer. If discharge to the sanitary sewer is not allowed, water should be pumped or vacuumed to a tank and properly disposed of. Do not dewater near a storm drain or stream. ■ Except for small communities with relatively few catch basins that may be cleaned manually, most municipalities will require mechanical cleaners such as eductors, vacuums, or bucket loaders. Storm Drain Conveyance System ■ Locate reaches of storm drain with deposit problems and develop a flushing schedule that keeps the pipe clear of excessive buildup. ■ Collect flushed effluent and pump to the sanitary sewer for treatment. Pump Stations ■ Clean all storm drain pump stations prior to the wet season to remove silt and trash. ■ Do not allow discharge from cleaning a storm drain pump station or other facility to reach the storm drain system. ■ Conduct quarterly routine maintenance at each pump station. ■ Inspect, clean, and repair as necessary all outlet structures prior to the wet season. ■ Sample collected sediments to determine if landfill disposal is possible, or illegal discharges in the watershed are occurring. Open Channel ■ Consider modification of storm channel characteristics to improve channel hydraulics, to increase pollutant removals, and to enhance channel/creek aesthetic and habitat value. ■ Conduct channel modification/improvement in accordance with existing laws. Any person, government agency, or public utility proposing an activity that will change the natural (emphasis added) state of any river, stream, or lake in California, must enter into a steam or Lake Alteration Agreement with the Department of Fish and Game. The developer -applicant should also contact local governments (city, county, special districts), other state agencies 2 of 9 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Drainage System Maintenance SC-74 (SWRCB, RWQCB, Department of Forestry, Department of Water Resources), and Federal Corps of Engineers and USFWS Illicit Connections and Discharges ■ During routine maintenance of conveyance system and drainage structures field staff should look for evidence of illegal discharges or illicit connections: - Is there evidence of spills such as paints, discoloring, etc. - Are there any odors associated with the drainage system - Record locations of apparent illegal discharges/illicit connections - Track flows back to potential dischargers and conduct aboveground inspections. This can be done through visual inspection of up gradient manholes or alternate techniques including zinc chloride smoke testing, fluorometric dye testing, physical inspection testing, or television camera inspection. - Once the origin of flow is established, require illicit discharger to eliminate the discharge. ■ Stencil storm drains, where applicable, to prevent illegal disposal of pollutants. Storm drain inlets should have messages such as "Dump No Waste Drains to Stream" stenciled next to them to warn against ignorant or intentional dumping of pollutants into the storm drainage system. ■ Refer to fact sheet SC-io Non-Stormwatet• Discharges. Illegal Dumping ■ Regularly inspect and clean up hot spots and other storm drainage areas where illegal dumping and disposal occurs. ■ Establish a system for tracking incidents. The system should be designed to identify the following: Illegal dumping hot spots Types and quantities (in some cases) of wastes Patterns in time of occurrence (time of day/night, month, or year) Mode of dumping (abandoned containers, "midnight dumping" from moving vehicles, direct dumping of materials, accidents/spills) Responsible parties ■ Post "No Dumping" signs in problem areas with a phone number for reporting dumping and disposal. Signs should also indicate fines and penalties for illegal dumping. ■ Refer to fact sheet SC-10 Non-Stormwater Discharges. January 2003 California Stormwater BMP Handbook 3 of 9 Municipal www.cabmphandbooks.com SC-74 Drainage System Maintenance ■ The State Department of Fish and Game has a hotline for reporting violations called Cal TIP (1-800-952-5400). The phone number may be used to report any violation of a Fish and Game code (illegal dumping, poaching, etc.). ■ The California Department of Toxic Substances Control's Waste Alert Hotline,1-800- 69TOXIC, can be used to report hazardous waste violations. Ti-aining ■ Train crews in proper maintenance activities, including record keeping and disposal. ■ Only properly trained individuals are allowed to handle hazardous materials/wastes. ■ Train municipal employees from all departments (public works, utilities, street cleaning, parks and recreation, industrial waste inspection, hazardous waste inspection, sewer maintenance) to recognize and report illegal dumping. ■ Train municipal employees and educate businesses, contractors, and the general public in proper and consistent methods for disposal. ■ Train municipal staff regarding non-stormwater discharges (See SC-io Non-Stormwater Discharges). Spill Response and Prevention ■ Refer to SC-1i, Prevention, Control & Cleanup ■ Have spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. Other Considerations ■ Cleanup activities may create a slight disturbance for local aquatic species. Access to items and material on private property may be limited. Trade-offs may exist between channel hydraulics and water quality/riparian habitat. If storm channels or basins are recognized as wetlands, many activities, including maintenance, may be subject to regulation and permitting. ■ Storm drain flushing is most effective in small diameter pipes (36-inch diameter pipe or less, depending on water supply and sediment collection capacity). Other considerations associated with storm drain flushing may include the availability of a water source, finding a downstream area to collect sediments, liquid/sediment disposal, and disposal of flushed effluent to sanitary sewer may be prohibited in some areas. ■ Regulations may include adoption of substantial penalties for illegal dumping and disposal. ■ Municipal codes should include sections prohibiting the discharge of soil, debris, refuse, hazardous wastes, and other pollutants into the storm drain system. ■ Private property access rights may be needed to track illegal discharges np gradient. 4 of 9 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Drainage System Maintenance SC-74 ■ Requirements of municipal ordinance authority for suspected source verification testing for illicit connections necessary for guaranteed rights of entry. Requirements Costs ■ An aggressive catch basin cleaning program could require a significant capital and O&M budget. A careful study of cleaning effectiveness should be undertaken before increased cleaning is implemented. Catch basin cleaning costs are less expensive if vacuum street sweepers are available; cleaning catch basins manually can cost approximately twice as much as cleaning the basins with a vacuum attached to a sweeper. ■ Methods used for illicit connection detection (smoke testing, dye testing, visual inspection, and flow monitoring) can be costly and time-consuming. Site -specific factors, such as the level of impervious area, the density and ages of buildings, and type of land use will determine the level of investigation necessary. Encouraging reporting of illicit discharges by employees can offset costs by saving expense on inspectors and directing resources more efficiently. Some programs have used funds available from "environmental fees" or special assessment districts to fund their illicit connection elimination programs. Maintenance ■ Two -person teams may be required to clean catch basins with vactor trucks. ■ Identifying illicit discharges requires teams of at least two people (volunteers can be used), plus administrative personnel, depending on the complexity of the storm sewer system. ■ Arrangements must be made for proper disposal of collected wastes. ■ Requires technical staff to detect and investigate illegal dumping violations, and to coordinate public education. Supplemental Information Further Detuil ,/'the B31Y Storm Drain flush inl Sanitary sewer flushing is a common maintenance activity used to improve pipe hydraulics and to remove pollutants in sanitary sewer systems. The same principles that make sanitary sewer flushing effective can be used to flush storm drains. Flushing may be designed to hydraulically convey accumulated material to strategic locations, such as to an open channel, to another point where flushing will be initiated, or over to the sanitary sewer and on to the treatment facilities, thus preventing re -suspension and overflow of a portion of the solids during storm events. Flushing prevents "plug flow" discharges of concentrated pollutant loadings and sediments. The deposits can hinder the designed conveyance capacity of the storm drain system and potentially cause backwater conditions in severe cases of clogging. Storm drain flushing usually takes place along segments of pipe with grades that are too flat to maintain adequate velocity to keep particles in suspension. An upstream manhole is selected to place an inflatable device that temporarily plugs the pipe. Further upstream, water is pumped into the line to create a flushing wave. When the upstream reach of pipe is sufficiently full to January 2003 California Stormwater BMP Handbook 5 of 9 Municipal www.cabmphandbooks.com SC-74 Drainage System Maintenance cause a flushing wave, the inflated device is rapidly deflated with the assistance of a vacuum pump, releasing the backed up water and resulting in the cleaning of the storm drain segment. To further reduce the impacts of stormwater pollution, a second inflatable device, placed well downstream, may be used to re -collect the water after the force of the flushing wave has dissipated. A pump may then be used to transfer the water and accumulated material to the sanitary sewer for treatment. In some cases, an interceptor structure may be more practical or required to re -collect the flushed waters. It has been found that cleansing efficiency of periodic flush waves is dependent upon flush volume, flush discharge rate, sewer slope, sewer length, sewer flow rate, sewer diameter, and population density. As a rule of thumb, the length of line to be flushed should not exceed 700 feet. At this maximum recommended length, the percent removal efficiency ranges between 65- 75 percent for organics and 55-65 percent for dry weather grit/inorganic material. The percent removal efficiency drops rapidly beyond that. Water is commonly supplied by a water truck, but fire hydrants can also supply water. To make the best use of water, it is recommended that reclaimed water be used or that fire hydrant line flushing coincide with storm drain flushing. Now Management Flow management has been one of the principal motivations for designing urban stream corridors in the past. Such needs may or may not be compatible with the stormwater quality goals in the stream corridor. Downstream flood peaks can be suppressed by reducing through flow velocity. This can be accomplished by reducing gradient with grade control structures or increasing roughness with boulders, dense vegetation, or complex banks forms. Reducing velocity correspondingly increases flood height, so all such measures have a natural association with floodplain open space. Flood elevations laterally adjacent to the stream can be lowered by increasing through flow velocity. However, increasing velocity increases flooding downstream and inherently conflicts with channel stability and human safety. Where topography permits, another way to lower flood elevation is to lower the level of the floodway with drop structures into a large but subtly excavated bowl where flood flows we allowed to spread out. Stream Corridor Planning Urban streams receive and convey stormwater flows from developed or developing watersheds. Planning of stream corridors thus interacts with urban stormwater management programs. If local programs are intended to control or protect downstream environments by managing flows delivered to the channels, then it is logical that such programs should be supplemented by management of the materials, forms, and uses of the downstream riparian corridor. Any proposal for steam alteration or management should be investigated for its potential flow and stability effects on upstream, downstream, and laterally adjacent areas. The timing and rate of flow from various tributaries can combine in complex ways to alter flood hazards. Each section of channel is unique, influenced by its own distribution of roughness elements, management activities, and stream responses. 6 of 9 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Drainage System Maintenance SC-74 Flexibility to adapt to stream features and behaviors as they evolve must be included in stream reclamation planning. The amenity and ecology of streams may be enhanced through the landscape design options of 1) corridor reservation, 2) bank treatment, 3) geomorphic restoration, and 4) grade control. Corridor reservation - Reserving stream corridors and valleys to accommodate natural stream meandering, aggradation, degradation, and over bank flows allows streams to find their own form and generate less ongoing erosion. In California, open stream corridors in recent urban developments have produced recreational open space, irrigation of streamside plantings, and the aesthetic amenity of flowing water. Bank treatment - The use of armoring, vegetative cover, and flow deflection may be used to influence a channel's form, stability, and biotic habitat. To prevent bank erosion, armoring can be done with rigid construction materials, such as concrete, masonry, wood planks and logs, riprap, and gabions. Concrete linings have been criticized because of their lack of provision of biotic habitat. In contrast, riprap and gabions make relatively porous and flexible linings. Boulders, placed in the bed reduce velocity and erosive power. Riparian vegetation can stabilize the banks of streams that are at or near a condition of equilibrium. Binding networks of roots increase bank shear strength. During flood flows, resilient vegetation is forced into erosion -inhibiting mats. The roughness of vegetation leads to lower velocity, further reducing erosive effects. Structural flow deflection can protect banks from erosion or alter fish habitat. By concentrating flow, a deflector causes a pool to be scoured in the bed. Geomorphic restoration — Restoration refers to alteration of disturbed streams so their form and behavior emulate those of undisturbed streams. Natural meanders are retained, with grading to gentle slopes on the inside of curves to allow point bars and riffle -pool sequences to develop. Trees are retained to provide scenic quality, biotic productivity, and roots for bank stabilization, supplemented by plantings where necessary. A restorative approach can be successful where the stream is already approaching equilibrium. However, if upstream urbanization continues new flow regimes will be generated that could disrupt the equilibrium of the treated system. Grade Control - A grade control structure is a level shelf of a permanent material, such as stone, masonry, or concrete, over which stream water flows. A grade control structure is called a sill, weir, or drop structure, depending on the relation of its invert elevation to upstream and downstream channels. A sill is installed at the preexisting channel bed elevation to prevent upstream migration of nick points. It establishes a firm base level below which the upstream channel can not erode. A weir or check dam is installed with invert above the preexisting bed elevation. A weir raises the local base level of the stream and causes aggradation upstream. The gradient, velocity, and erosive potential of the stream channel are reduced. A drop structure lowers the downstream invert below its preexisting elevation, reducing downstream gradient and velocity. Weirs and drop structure control erosion by dissipating energy and reducing slope velocity. January 2003 California Stormwater BMP Handbook 7 Of 9 Municipal www.cabmphandbooks.com SC-74 Drainage System Maintenance When carefully applied, grade control structures can be highly versatile in establishing human and environmental benefits in stabilized channels. To be successful, application of grade control structures should be guided by analysis of the stream system both upstream and downstream from the area to he reclaimed. Examples The California Department of Water Resources began the Urban Stream Restoration Program in 1985. The program provides grant funds to municipalities and community groups to implement stream restoration projects. The projects reduce damages from streambank aid watershed instability and floods while restoring streams' aesthetic, recreational, and fish and wildlife values. In Buena Vista Park, upper floodway slopes are gentle and grassed to achieve continuity of usable park land across the channel of small boulders at the base of the slopes. The San Diego River is a large, vegetative lined channel, which was planted in a variety of species to support riparian Hrildlife while stabilizing the steep banks of the floodway. References and Resources Ferguson, B.K.1991. Urban Stream Reclamation, P. 324-322, Journal of Soil and Water Conservation. Los Angeles County Stormwater Quality. Public Agency Activities Model Program. On-line: hhMe 11adpw.o wmd/npdes/public TC.cfm Model Urban Runoff Program: A How -To Guide for Developing Urban Runoff Programs for Small Municipalities. Prepared by City of Monterey, City of Santa Cruz, California Coastal Commission, Monterey Bay National Marine Sanctuary, Association of Monterey Bay Area Governments, Woodward -Clyde, Central Coast Regional Water Quality Control Board. July. 1998. Orange County Stormwater Program http:/h+i%w.ocNvatersheds.comZStormWater/smT introduction.asp Santa Clara Valley Urban Runoff Pollution Prevention Program. 1997 Urban Runoff Management Plan. September 1997, updated October 2000. San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP) Municipal Activities Model Program Guidance. 2001. Project Clean Water. November. United States Environmental Protection Agency (USEPA). 1999• Stormwater Management Fact Sheet Non-stormwater Discharges to Storm Sewers. EPA 832-F-99-022. Office of Water, Washington, D.C. September. United States Environmental Protection Agency (USEPA). 1999. Stormwater O&M Fact Sheet Catch Basin Cleaning. EPA 832-F-99-oil. Office of Water, Washington, D.C. September. 8 of 9 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Drainage System Maintenance SC-74 United States Environmental Protection Agency (USEPA). 2002. Pollution Prevention/Good Housekeeping for Municipal Operations Illegal Dumping Control. On line: http://www.epa.gov/npdes/menuofbmM/poll 7.htm United States Environmental Protection Agency (USEPA). 2002. Pollution Prevention/Good Housekeeping for Municipal Operations Storm Drain System Cleaning. On line: http:/1w%-w.cpa.goy /npdeslmenuofbmps/poll 16.htm January 2003 California Stormwater BMP Handbook 9 of 9 Municipal www.cabmphandbooks.com Waste Handling and Disposal SC-75 Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Reuse Targeted Constituents Description Sediment Q It is important to control litter to eliminate trash and other Nutrients Q materials in stormwater runoff. Waste reduction is a major component of waste management and should be encouraged Trash Q through training and public outreach. Management of waste Metals Q once it is collected may involve reuse, recycling, or proper Bacteria Q disposal. Oil and Grease Q Organics Q Approach Oxygen Demanding Q Pollution Prevention ■ Reuse products when possible. ■ Encourage recycling programs with recycling bins, used oil collection, etc. Suggested Protocols Solid Waste Collection ■ Implement procedures, where applicable, to collect, transport, and dispose of solid waste at appropriate disposal facilities in accordance with applicable federal, state, and local laws and regulations. ■ Include properly designed trash storage areas. If feasible provide cover over trash storage areas. ■ Regularly inspect solid waste containers for structural damage. Repair or replace damaged containers as necessary. January 2003 California Stormwater BMP Handbook 1 of 4 Municipal www.cabmphandbooks.com SC-75 Waste Handling and Disposal ■ Secure solid waste containers; containers must be closed tightly when not in use. ■ Do not fill waste containers with washout water or any other liquid. ■ Ensure that only appropriate solid wastes are added to the solid waste container. Certain wastes such as hazardous wastes, appliances, fluorescent lamps, pesticides, etc. may not be disposed of in solid waste containers (see chemical/ hazardous waste collection section below). ■ Do not mix wastes; this can cause chemical reactions, make recycling impossible, and complicate disposal. ■ Refer to SC-34 Waste Handling and Disposal for more information regarding solid waste facilities. Waste Reduction and Recycling ■ Recycle wastes whenever possible. Many types of waste can be recycled, recycling options for each waste type are limited. All gasoline, antifreeze, waste oil, and lead -acid batteries can be recycled. Latex and oil -based paint can be reused, as well as recycled. Materials that cannot be reused or recycled should either be incinerated or disposed of at a properly permitted landfill. ■ Recycling is always preferable to disposal of unwanted materials. ■ Recycling bins for glass, metal, newspaper, plastic bottles and other recyclable household solid wastes should be provided at public facilities and/or for residential curbside collection. Controlling Litter ■ Post "No Littering" signs and enforce anti -litter laws. ■ Provide litter receptacles in busy, high pedestrian traffic areas of the community, at recreational facilities, and at community events. ■ Clean out and cover litter receptacles frequently to prevent spillage. Illegal Dumping Substances illegally dumped on streets and into the storm drain system and creeks include paints, used oil and other automotive fluids, construction debris, chemicals, fresh concrete, leaves, grass clipping, and pet wastes. ■ Post "No Dumping" signs with a phone number for reporting dumping and disposal. Signs should also indicate fines and penalties for illegal dumping. ■ Landscaping and beautification efforts of hot spots might also discourage future dumping. ■ See SC-74 Drainage System Maintenance, and SC-10 Non-Stormwater Discharges. 2 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Waste Handling and Disposal SC-7S Requirements Costs ■ The costs for a solid waste source control program vary depending on the type of method. The cost of a community education program or a plan to increase the number of trash receptacles can be very minimal. Costs for structural controls such as trash racks, bar screens, and silt traps can be quite costly ranging from $250,000 to $900,000. ■ A collection facility or curbside collection for used oil may result in significant costs. Commercial locations (automobile service stations, quick oil change centers, etc.) as collection points eliminate hauling and recycling costs. ■ Collection and disposal of hazardous waste can be very expensive and requires trained operators; laboratory and detection equipment; and extensive record keeping including dates, types, and quantities. ■ Use of volunteer work forces can lower storm drain stenciling program costs. Stenciling kits require procurement of durable/disposable items. The stenciling program can aid in the cataloging of the storm drain system. One municipality from the state of Washington has estimated that stenciling kits cost approximately $5o each. Stencils may cost about $8 each including the die cost on an order of 1,000. Re -orders cost about $1/stencil. Stencil designs may be available from other communities. Stencil kits should be provided on a loan basis to volunteer groups free of charge with the understanding that kit remnants are to be returned. Maintenance ■ The primary staff demand for stenciling programs is for program setup to provide marketing and training. Ongoing/follow-up staff time is minimal because of volunteer services. ■ Staffing requirements are minimal for oil recycling programs if collection/recycling is contracted out to a used oil hauler/recycler or required at commercial locations. ■ Staff requirements for maintaining good housekeeping BMPs at waste handling sites is minimal. Supplemental Information Further Detail of the BMP Waste Reduction An approach to reduce stormwater pollution from waste handling and disposal is to assess activities and reduce waste generation. The assessment is designed to find situations where waste can be eliminated or reduced and emissions and environmental damage can be minimized. The assessment involves collecting process specific information, setting pollution prevention targets, and developing, screening and selecting waste reduction options for further study. Starting a waste reduction program is economically beneficial because of reduced raw material purchases and lower waste disposal fees. January 2003 California Stormwater BMP Handbook 3 of 4 Municipal www.cabmphandbooks.com SC-75 References and Resources Waste Handling and Disposal Best Management Practices Program for Pollution Prevention, City and County of San Francisco, Uribe & Associates, Oakland, California, 19go. Harvard University. 2002. Solid Waste Container Best Management Practices — Fact Sheet On - Line Resources — Environmental Health and Safety. Model Urban Runoff Program: A How -To -Guide for Developing Urban Runoff Programs for Small Municipalities. Prepared by City of Monterey, City of Santa Cruz, California Coastal Commission, Monterey Bay National Marine Sanctuary, Association of Monterey Bay Area Governments, Woodward -Clyde, Central Coast Regional Water Quality Control Board. July 1998. (Revised February 2002 by the California Coastal Commission). Orange County Stormwater Program h!W:Ilwww.ocwatersheds.com/StormWater/swp introduction.asp. Santa Clara Valley Urban Runoff Pollution Prevention Program. 1997 Urban Runoff Management Plan. September 1997, updated October 2000. 4 of 4 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Water & Sewer Utility Maintenance SC-76 Description Although the operation and maintenance of public utilities are not considered chronic sources of stormwater pollution, some activities and accidents can result in the discharge of pollutants that can pose a threat to both human health and the quality of receiving waters if they enter the storm drain system. Sewage incident response and investigation may involve a coordinated effort between staff from a number of different departments/agencies. Cities that do not provide maintenance of water and sewer utilities must coordinate with the contracting agency responsible for these activities and ensure that these model procedures are followed. Approach Pollution Prevention Inspect potential non-stormwater discharge flow paths and clear/cleanup any debris or pollutants found (i.e. remove trash, leaves, sediment, and wipe up liquids, including oil spills). Suggested Protocols Water Line Maintenance and Cleaning Procedures can be employed to reduce pollutants from discharges associated with water utility operation and maintenance activities. Planned discharges may include fire hydrant testing, flushing water supply mains after new construction, flushing lines due to complaints of taste and odor, dewatering mains for maintenance work. Unplanned discharges from treated, recycled water, raw water, and groundwater systems operation and maintenance activities can occur from water main Objectives ■ Contain ■ Educate ■ Reduce/Minimize Targeted Constituents Sediment Q Nutrients Q Trash Metals Bacteria Q Oil and Grease Q Organics Q Oxygen Demanding Q January 2003 California Stormwater BMP Handbook 1 of 8 Municipal www.cabmphandbooks.com SC-76 Water & Sewer Utility Maintenance breaks, sheared fire hydrants, equipment malfunction, and operator error. Planned discharges ■ Identify a suitable discharge option in the following order of preference: - Apply to the land. - Reuse water for dust suppression, irrigation, or construction compaction. - Discharge to a sanitary sewer system with approval. - Discharge to the storm drain system using applicable pollution control measures. (Only available to clean water discharges such as water main/ water storage tank/water hydrant flushing). ■ If water is discharged to a storm drain, control measures must be put in place to control potential pollutants (i.e. sediment, chlorine, etc.). Examples of some storm drain protection options include: - Silt fence — appropriate where the inlet drains a relatively flat area. - Gravel and wire mesh sediment filter — Appropriate where concentrated flows are expected. - Wooden weir and fabric — use at curb inlets where a compact installation is desired. ■ Prior to discharge, inspect discharge flow path and clear/cleanup any debris or pollutants found (i.e. remove trash, leaves, sediment, and wipe up liquids, including oil spills). ■ General Design considerations for inlet protection devices include the following: - The device should be constructed such that cleaning and disposal of trapped sediment is made easy, while minimizing interference with discharge activities. Devices should be constructed so that any standing water resulting from the discharge will not cause excessive inconvenience or flooding/damage to adjacent land or structures. ■ The effectiveness of control devices must be monitored during the discharge period and any necessary repairs or modifications made. Unplanned Discharges ■ Stop the discharge as quickly as possible. ■ Inspect flow path of the discharged water: - Identify erodible areas which may need to be repaired or protected during subsequent repairs or corrective actions 2 of 8 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Water & Sewer Utility Maintenance SC-76 - Identify the potential for pollutants to be washed into the waterway ■ If repairs or corrective action will cause additional discharges of water, select the appropriate procedures for erosion control, chlorine residual, turbidity, and chemical additives. Prevent potential pollutants from entering the flow path. Sanitary Sewer Maintenance Applicable to municipalities who own and operated a sewage collection system. Facilities that are covered under this program include sanitary sewer pipes and pump stations owned and operated by a municipality. The owner of the sanitary sewer facilities is the entity responsible for carrying out this prevention and response program. ■ Clean sewer lines on a regular basis to remove grease, grit, and other debris that may lead to sewer backups. ■ Establish routine maintenance program. Cleaning should be conducted at an established minimum frequency and more frequently for problem areas such as restaurants that are identified ■ Cleaning activities may require removal of tree roots and other identified obstructions. ■ During routine maintenance and inspection note the condition of sanitary sewer structures and identify areas that need repair or maintenance. Items to note may include the following: - Cracked/deteriorating pipes - Leaking joints/seals at manhole - Frequent line plugs - Line generally flows at or near capacity - Suspected infiltration or exf"iltration. ■ Prioritize repairs based on the nature and severity of the problem. Immediate clearing of blockage or repair is required where an overflow is currently occurring or for urgent problems that may cause an imminent overflow (e.g. pump station failures, sewer line ruptures, sewer line blockages). These repairs may be temporary until scheduled or capital improvements can be completed. ■ Review previous sewer maintenance records to help identify "hot spots" or areas with frequent maintenance problems and locations of potential system failure. Spills and Overflows ■ Identify and track sanitary sewer discharges. Identify dry weather infiltration and inflow first. Wet weather overflow connections are very difficult to locate. January 2003 California Stormwater BMP Handbook 3 of 8 Municipal www.cabmphandbooks.com SC-76 Water & Sewer Utility Maintenance ■ Locate wet weather overflows and leaking sanitary sewers using conventional source identification techniques such as monitoring and field screening. Techniques used to identify other illicit connection sources can also be used for sewer system evaluation surveys (see SC74 Drainage System Operation and Maintenance). ■ Implement community awareness programs for monitoring sanitary sewer wet weather overflows. A citizen's hotline for reporting observed overflow conditions should be established to supplement field screening efforts. ■ Establish lead department/agency responsible for spill response and containment. Provide coordination within departments. ■ When a spill, leak, and/or overflow occurs and when disinfecting a sewage contaminated area, take every effort to ensure that the sewage, disinfectant and/or sewage treated with the disinfectant is not discharged to the storm drain system or receiving waters. Methods may include: - Blocking storm drain inlets and catch basins - Containing and diverting sewage and disinfectant away from open channels and other storm drain fixtures (using sandbags, inflatable dams, etc.) - Removing the material with vacuum equipment ■ Record required information at the spill site. ■ Perform field tests as necessary to determine the source of the spill. ■ Develop notification procedures regarding spill reporting. Septic Systems ■ Ensure that homeowners, installers, and inspectors are educated in proper maintenance of septic systems. This may require coordination with staff from other departments. Outreach to homeowners should include inspection reminders informing then that inspection and perhaps maintenance is due for their systems. Recommend that the system be inspected annually and pumped -out regularly. ■ Programs which seek to address failing septic systems should consider using field screening to pinpoint areas where more detailed onsite inspection surveys are warranted. Training ■ Conduct annual training of water utility personnel and service contractors. (field screening, sampling, smoke/dye testing, TV inspection). ■ OSHA -required Health and Safety Training 29 CFR 1910.120 plus annual Refresher Training (as needed). ■ OSHA Confined Space Entry training (Cal -OSHA Confined Space, Title 8 and federal OSHA 29 CFR 1910.146). 4 of 8 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Water & Sewer Utility Maintenance SC-76 Spill Response and Prevention ■ See previous section regarding spills and overflows. ■ Refer to SC-ii, Spill Prevention, Control & Cleanup. ■ Have spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately and use dry methods if possible. ■ Properly dispose of spill cleanup material. Other Considerations ■ Enact ordinance granting "right -of -entry" to locate potentially responsible parties for sewer overflows. ■ Reliance on individual onsite inspection to detect failed septic systems can be a major limitation. The individual onsite inspection is very labor-intensive and requires access to private property to pinpoint the exact location of the failing system. ■ A significant limitation to correcting failing septic systems is the lack of techniques available for detecting individual failed septic systems. Requirements Costs ■ Departmental cooperation recommended for sharing or borrowing staff resources and equipment from municipal wastewater department. ■ Infiltration, inflow, and wet weather overflows from sanitary sewers are very labor and equipment intensive to locate. ■ The costs associated with detecting and correcting septic system failures are subject to a number of factors, including availability of trained personnel, cost of materials, and the level of follow-up required to fix the system problems. Maintenance ■ Minimum 2-person teams to perform field screening and associated sampling. ■ Larger teams required for implementing other techniques (i.e. zinc chloride smoke testing, fluorometric dye testing, television camera inspection and physical inspection with confined space entry) to identify sewer system leaks. ■ Program coordination required for handling emergencies, record keeping, etc. ■ Many of the problems associated with improper use of septic systems may be attributed to lack of user knowledge on operation and maintenance. Educational materials for homeowners and training courses for installers and inspectors can reduce the incidence of pollution from these widespread and commonly used pollution control devices. January 2003 California Stormwater BMP Handbook 5 of 8 Municipal www.cabmphandbooks.com SC-76 Water & Sewer Utility Maintenance Supplemental Information Further Detail of the BMP Onsite Sewage Disposal Systems New onsite sewage disposal systems should be designed, located, and installed away from open waterbodies and sensitive resources such as wetlands and floodplains. A protective separation between the OSDS and groundwater should also be established. OSDSs should be operated and maintained to prevent surface water discharges and reduce pollutant loadings to groundwater. Inspection of OSDSs should occur regularly and repairs made immediately. New or replacement plumbing fixtures should be of the high efficiency type. Typical Sanitary Sewer Problems ■ Old and deteriorated main and lateral pipes - Sewers range in age from 30 to ioo years with an average age of 50 years. ■ Cracked sewer pipes - Existing sewers are mostly clay pipes which can crack as they deteriorate with age and also by earth movement. ■ Misaligned and open pipe joints - Most of the mortar used to seal the joints between sections of clay pipe has deteriorated. ■ Undersized sewer pipe - The existing sewer system is overloaded due to new sewer hook- ups, underground water infiltration, and illegal roof and/or yard drain connections. ■ Defective manholes - Old manholes are made of bricks. Typical problems associated with brick manholes are loose bricks, missing bricks, and misaligned manholes. ■ Missing and/or unrecorded sewer pipes and manholes - This problem is typical in the easement/backline sewer. Sewer pipe locations shown on the sewer record map are different from the actual sewer location. ■ Sewer main under houses and other improvements - Complaints of sewer main alignment crossing the house and other improvements. A solution to this problem requires an agreement with the property owner for a new sewer easement at a relocated line. Causes of Sanitary Sewer Backups ■ Root infiltration - Tree roots are a major cause of backups. ■ Water inflow/infiltration - Rain water entering the sewer pipe causes overflows. ■ Solids - Typical solids that buildup in the pipe and cause backups are grease, dirt, bones, tampons, paper towels, diapers, broken dishware, garbage, concrete, and debris. ■ Structural defects in pipes and manholes - Sags in the line, cracks, holes, protruding laterals, misaligned pipe, offset joints are all possible causes of backups. 6 of 8 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Water & Sewer Utility Maintenance SC-76 Design Considerations Sanitary sewer overflows can often be reduced or eliminated by a number of practices, in addition to sewer system cleaning and maintenance, including the following: ■ Reducing infiltration and inflow through rehabilitation and repair of broken or leaking sewer lines. ■ Enlarging or upgrading the capacity of sewer lines, pump stations, or sewage treatment plants. ■ Constructing wet weather storage and treatment facilities to treat excess flows. ■ Addressing SSOs during sewer system master planning and facilities planning. Septic Systems Two field screening techniques that have been used with success at identifying possible locations of failing septic systems are the brightener test and color infrared (CIR) aerial photography. The first involves the use of specific phosphorus -based elements found in many laundry products, often called brighteners, as an indicator of the presence of failing onsite wastewater systems. The second technique uses color infrared (CIR) aerial photography to characterize the performance of septic systems. This method has been found to be a quick and cost-effective method for assessing the potential impacts of failing systems and uses variations in vegetative growth or stress patterns over septic system field lines to identify those systems that may potentially be malfunctioning. Then a more detailed onsite visual and physical inspection will confirm whether the system has truly failed and the extent of the repairs needed. These inspections may be carried out by county health departments or other authorized personnel. References and Resources Alameda Countywide Clean Water Program on-line http: //www.ci.berkeley.ca.uslpw/Storm/stormala.html Los Angeles County Stormwater Quality. Public Agency Activities Model Program. On-line: http://ladpw.org/wmd/npdes/public TC.cfm Orange County Stormwater Program h=:///www.ocwatersheds.com/StormWater/swp introduction. asp Santa Clara Valley Urban Runoff Pollution Prevention Program. 1997 Urban Runoff Management Plan. September 1997, updated October 2000. Santa Clara Valley Urban Runoff Pollution Prevention Program. 1998. Water Utility Operation and Maintenance Discharge Pollution Prevention Plan. June United States Environmental Protection Agency (USEPA). 2001. Illicit Discharge Detection and Elimination. On-line: http://cfpub.epa.gov/npdes/stormwater/menuofbmps/illi i.cfm January 2003 California Stormwater BMP Handbook 7 of 8 Municipal www.cabmphandbooks.com SC-76 Water & Sewer Utility Maintenance United States Environmental Protection Agency (USEPA). 2001. Pollution Prevention/Good Housekeeping for Municipal Operators Septic System Controls. On-line: httl2:/Jwww.epa.gov/npdesf menuofbmps/poll i4.htm 8 of 8 California Stormwater BMP Handbook January 2003 Municipal www.cabmphandbooks.com Infiltration Trench Description An infiltration trench is a long, narrow, rock -filled trench uith no outlet that receives stormwater runoff. Runoff is stored in the void space between the stones and infiltrates through the bottom and into the soil matrix. Infiltration trenches perform well for removal of fine sediment and associated pollutants. Pretreatment using buffer strips, swales, or detention basins is important for limiting amounts of coarse sediment entering the trench which can clog and render the trench ineffective. California Experience Caltrans constructed two infiltration trenches at highway maintenance stations in Southern California. Of these, one failed to operate to the design standard because of average soil infiltration rates lower than that measured in the single infiltration test. This highlights the critical need for appropriate evaluation of the site. Once in operation, little maintenance was required at either site. Advantages ■ Provides i00% reduction in the load discharged to surface waters. ■ An important benefit of infiltration trenches is the approximation of pre -development hydrology during which a significant portion of the average annual rainfall runoff is infiltrated rather than flushed directly to creeks. ■ If the water quality volume is adequately sized, infiltration trenches can be usefiil for providing control of channel forming (erosion) and high frequency (generally less than the 2-year) flood events. TC-10 Design Considerations ■ Accumulation of Metals ■ Clogged Soil Outlet Structures ■ Vegetation/Landscape Maintenance Targeted Constituents 9 Sediment ■ 0 Nutrients ■ 2 Trash ■ 0 Metals ■ 0 Bacteria ■ Z Oil and Grease ■ 9 Organics ■ Legend (Removal Effectiveness) • Low ■ High ♦ Medium t AIMC"A HOOMM'A "11 V/ V I11 AibIKlAM-s January 2003 California Stormwater BMP Handbook 1 of 7 New Development and Redevelopment www.cabmphandbooks.com TC-10 Infiltration Trench ■ As an underground BMP, trenches are unobtrusive and have little impact of site aesthetics. Limitations ■ Have a high failure rate if soil and subsurface conditions are not suitable. • May not be appropriate for industrial sites or locations where spills may occur. • The maximum contributing area to an individual infiltration practice should generally be less than 5 acres. ■ Infiltration basins require a minimum soil infiltration rate of 0.5 inches/hour, not appropriate at sites with Hydrologic Soil Types C and D. ■ If infiltration rates exceed 2.4 inches/hour, then the runoff should be fully treated prior to infiltration to protect groundwater quality. ■ Not suitable on fill sites or steep slopes. ■ Risk of groundwater contamination in very coarse soils. ■ Upstream drainage area must be completely stabilized before construction. ■ Difficult to restore functioning of infiltration trenches once clogged. Design and Sizing Guidelines ■ Provide pretreatment for infiltration trenches in order to reduce the sediment load. Pretreatment refers to design features that provide settling of large particles before runoff reaches a management practice, easing the long-term maintenance burden. Pretreatment is important for all structural stormwater management practices, but it is particularly important for infiltration practices. To ensure that pretreatment mechanisms are effective, designers should incorporate practices such as grassed swales, vegetated filter strips, detention, or a plunge pool in series. ■ Specify locally available trench rock that is 1.5 to 2.5 inches in diameter. ■ Determine the trench volume by assuming the WQV will fill the void space based on the computed porosity of the rock matrix (normally about 35%)• ■ Determine the bottom surface area needed to drain the trench within 72 hr by dividing the WQV by the infiltration rate. d_WQV +RFV SA ■ Calculate trench depth using the following equation: where: D = Trench depth 2 of 7 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Infiltration Trench TC-10 WQV = Water quality volume RFV = Rock fill volume SA = Surface area of the trench bottom ■ The use of vertical piping, either for distribution or infiltration enhancement shall not he allowed to avoid device classification as a Class V injection well per 40 CFRi46.5(e)(4). ■ Provide observation well to allow observation of drain time. ■ May include a horizontal layer of filter fabric just below the surface of the trench to retain sediment and reduce the potential for clogging. Construction/Inspection Considerations Stabilize the entire area draining to the facility before construction begins. If impossible, place a diversion berm around the perimeter of the infiltration site to prevent sediment entrance during construction. Stabilize the entire contributing drainage area before allowing any runoff to enter once construction is complete. Performance Infiltration trenches eliminate the discharge of the water quality volume to surface receiving waters and consequently can be considered to have i00% removal of all pollutants within this volume. Transport of some of these constituents to groundwater is likely, although the attenuation in the soil and subsurface layers will be substantial for many constituents. Infiltration trenches can be expected to remove up to 90 percent of sediments, metals, coliform bacteria and organic matter, and up to 6o percent of phosphorus and nitrogen in the infiltrated runoff (Schueler, 1992). Biochemical oxygen demand (BOD) removal is estimated to be between 70 to 80 percent. Lower removal rates for nitrate, chlorides and soluble metals should be expected, especially in sandy soils (Schueler,1992). Pollutant removal efficiencies may be improved by using washed aggregate and adding organic matter and loam to the subsoil. The stone aggregate should be washed to remove dirt and fines before placement in the trench. The addition of organic material and loam to the trench subsoil may enhance metals removal through adsorption. Siting Criteria The use of infiltration trenches may be limited by a number of factors, including type of native soils, climate, and location of groundwater table. Site characteristics, such as excessive slope of the drainage area, fine-grained soil types, and proximate location of the water table and bedrock, may preclude the use of infiltration trenches. Generally, infiltration trenches are not suitable for areas with relatively impermeable soils containing clay and silt or in areas with fill. As with any infiltration BMP, the potential for groundwater contamination must be carefully considered, especially if the groundwater is used for human consumption or agricultural purposes. The infiltration trench is not suitable for sites that use or store chemicals or hazardous materials unless hazardous and toxic materials are prevented from entering the trench. In these areas, other BMPs that do not allow interaction with the groundwater should be considered. January 2003 California Stormwater BMP Handbook 3 of 7 New Development and Redevelopment www.cabmphandbooks.com TC-10 Infiltration Trench The potential for spills can be minimized by aggressive pollution prevention measures. Many municipalities and industries have developed comprehensive spill prevention control and countermeasure (SPCC) plans. These plans should be modified to include the infiltration trench and the contributing drainage area. For example, diversion structures can be used to prevent spills from entering the infiltration trench. Because of the potential to contaminate groundwater, extensive site investigation must be undertaken early in the site planning process to establish site suitability for the installation of an infiltration trench. Longevity can be increased by careful geotechnical evaluation prior to construction and by designing and implementing an inspection and maintenance plan. Soil infiltration rates and the water table depth should be evaluated to ensure that conditions are satisfactory for proper operation of an infiltration trench. Pretreatment structures, such as a vegetated buffer strip or water quality inlet, can increase longevity by removing sediments, hydrocarbons, and other materials that may clog the trench. Regular maintenance, including the replacement of clogged aggregate, will also increase the effectiveness and life of the trench. Evaluation of the viability of a particular site is the same as for infiltration basins and includes: ■ Determine soil type (consider RCS soil type `A, B or Conly) from mapping and consult USDA soil survey tables to review other parameters such as the amount of silt and clay, presence of a restrictive layer or seasonal high water table, and estimated permeability. The soil should not have more than 30 percent clay or more than 40 percent of clay and silt combined. Eliminate sites that are clearly unsuitable for infiltration. ■ Groundwater separation should be at least 3 m from the basin invert to the measured ground water elevation. There is concern at the state and regional levels of the impact on groundwater quality from infiltrated runoff, especially when the separation between groundwater and the surface is small. ■ Location away from buildings, slopes and highway pavement (greater than 6 m) and wells and bridge structures (greater than 30 m). Sites constructed of fill, having a base flow or with a slope greater than 15 percent should not be considered. ■ Ensure that adequate head is available to operate flow splitter structures (to allow the basin to be offline) without ponding in the splitter structure or creating backwater upstream of the splitter. ■ Base flow should not be present in the tributary watershed. Secondary Screening Based on Site Geotechnical Investigation ■ At least three in -hole conductivity tests shall be performed using USBR 7300-89 or Bouwer- Rice procedures (the latter if groundwater is encountered within the boring), two tests at different locations within the proposed basin and the third down gradient by no more than approximately io m. The tests shall measure permeability in the side slopes and the bed within a depth of 3 m of the invert. ■ The minimum acceptable hydraulic conductivity as measured in any of the three required test holes is 13 mm/hr. If any test hole shows less than the minimum value, the site should be disqualified from further consideration. 4 of 7 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Infiltration Trench TC-10 ■ Exclude from consideration sites constructed in fill or partially in fill unless no silts or clays are present in the soil boring. Fill tends to be compacted, with clays in a dispersed rather than flocculated state, greatly reducing permeability. ■ The geotechnical investigation should be such that a good understanding is gained as to how the stormwater runoff will move in the soil (horizontally or vertically) and if there are any geological conditions that could inhibit the movement of water. Maintenance Infiltration trenches required the least maintenance of any of the BMPs evaluated in the Caltrans study, with approximately 17 field hours spent on the operation and maintenance of each site. Inspection of the infiltration trench was the largest field activity, requiring approximately 8 hr/yr. In addition to reduced water quality performance, clogged infiltration trenches with surface standing water can become a nuisance due to mosquito breeding. If the trench takes more than 72 hours to drain, then the rock fill should be removed and all dimensions of the trench should be increased by 2 inches to provide a fresh surface for infiltration. Cost Construction Cost Infiltration trenches are somewhat expensive, when compared to other stormwater practices, in terms of cost per area treated. Typical construction costs, including contingency and design costs, are about $5 per ft3 of stormwater treated (SWRPC, i991; Brown and Schueler, 1997). Actual construction costs may be much higher. The average construction cost of two infiltration trenches installed by Caltrans in southern California was about $50/ft3; however, these were constructed as retrofit installations. Infiltration trenches typically consume about 2 to 3 percent of the site draining to them, which is relatively small. In addition, infiltration trenches can fit into thin, linear areas. Thus, they can generally fit into relatively unusable portions of a site. Maintenance Cost One cost concern associated with infiltration practices is the maintenance burden and longevity. If improperly sited or maintained, infiltration trenches have a high failure rate. In general, maintenance costs for infiltration trenches are estimated at between 5 percent and 20 percent of the construction cost. More realistic values are probably closer to the 20-percent range, to ensure long-term functionality of the practice. References and Sources of Additional Information Caltrans, 2002, BMP Retrofit Pilot Program Proposed Final Report, Rpt. CTSW-RT-of-050, California Dept. of Transportation, Sacramento, CA. Brown, W., and T. Schueler. 1997. The Economics of Stormwater BMPs in the Mid -Atlantic Region. Prepared for the Chesapeake Research Consortium, Edgewater, MD, by the Center for Watershed Protection, Ellicott City, MD. Galli, J. 1992. Analysis of Urban BMP Performance and Longevity in Prince George's County, Maryland. Metropolitan Washington Council of Governments, Washington, DC. January 2003 California Stormwater BMP Handbook 5 of 7 New Development and Redevelopment www.cabmphandbooks.com TC-10 Infiltration Trench Maryland Department of the Environment (MDE). 2000. Maryland Stormwater Design Manual. http:l/vrw%v,mde.state.md.us/environmentlwmalstormwatermanual. Accessed May 22, 2001. Metzger, M. E., D. F. Messer, C. L. Beitia, C. M. Myers, and V. L. Kramer. 2002. The Dark Side Of Stormwater Runoff Management: Disease Vectors Associated With Structural BMPs. Stormwater 3(2): 24-39. Schueler, T. 1987. Controlling Urban Runoff. A Practical Manual for Planning and Designing Urban BMPs. Metropolitan Washington Council of Governments, Washington, DC. Southeastern Wisconsin Regional Planning Commission (SWRPC). 1991. Costs of Urban Nonpoint Source Water Pollution Control Measures. Southeastern Wisconsin Regional Planning Commission, Waukesha, WI. Watershed Management Institute (WMI). 1997. Operation, Maintenance, and Management of Stormwater Management Systems. Prepared for U.S. Environmental Protection Agency, Office of Water, Washington, DC. Igformation Resources Center for Watershed Protection (CWP). 1997. Stormwater BMP Design Supplement for Cold Climates. Prepared for the U.S. Environmental Protection Agency, Office of Wetlands, Oceans and Watersheds, Washington, DC, by the Center for Watershed Protection, Ellicott City, MD. Ferguson, B.K. 1994. Stormwater Infiltration. CRC Press, Ann Arbor, MI. Minnesota Pollution Control Agency. 1989. Protecting Water Quality in Urban Areas: Best Management Practices. Minnesota Pollution Control Agency, Minneapolis, MN. USEPA. 1993• Guidance to Specify Management Measures far Sources of Nonpoint Pollution in Coastal Waters. EPA-840-B-92-002. U.S. Environmental Protection Agency, Office of Water, Washington, DC. 6 of 7 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Infiltration Trench TC-10 PARKING LOT BYPASS (TO DETENTION FACILITY) CONCRETE LEVEL SPREADER— GRASS CHANNEL (LE SS THAN I % PLUNGE Y W W Y V W Y W SLOPE) YYY YY YWY Y POOL YY YYYVYW YV W VWW YWWWYW WY WYV YVYY Y YYYY YW►YYY V YWYYY YVYYYY YYYYYY WV YYYY ,_ ►vvvWv INFILTRATION TRENCH WITH PEA GRAVEL �J ==I FILTER LAYER • - r..,4 OVER wasHEo BANK RUN GRAVEL AGGREGATE OVERFLOW PLAN VIEW OVERFLOW BERM RUNOFF FILTERS THROUGH GRASS OBSERVATION WELL BUFFER STRIP (20- MINIMUM): GRASS /�J�,;�;� W 'TH SCREW TOP UD ` `' + 1 �` /, IC`H/ANNEL- OR SEDIMENTATION VAUI,' III�1 1111_l L WADVAW AIA 4 'r9'.(K�!� ` Z" PEA GRAVEL FILTER LAYER T"'Y PROTECTIVE LAYER OF FILTER FABRIC tRyA°i �! LP - TRENCH 3-8 FEET DEEP t T• t I FILLED WITH 1 5- 2-5 INCH DIAMETER 4 !••R�! _ CLEAN STONE PREFERRED) (BANK RUN GRAVEL rji?� JI Nli •.,• ��;, SAND FILTER 6'DEEP (OR FABRIC EQUIVALENT) �i14n'III RUNDFF EXFILTRATES THROUGH UNDISTURBED SUBSOILS WITH A MINIMUM RATE OF D 3 INCHES PER HOUR SECTION lanuary 2003 California Stormwater BMP Handbook 7 of 7 New Development and Redevelopment www.cabmphandbooks.com 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Appendix E Soils Report 45090 Golf Center Parkway, Suite F, Indio, CA 92201(760) 863-0713 Fax (760) 863-0847 6782 Stanton Avenue, Suite C, Buena Park, CA 90621 (714) 523-0952 Fax (714) 523-1369 450 Egan Avenue, Beaumont, CA 92223 (951) 845-7743 Fax (951) 845-8863 800 E. Florida Avenue, Hemet, CA 92543 (951)766-8777 Fax (951) 766-8778 November 12, 2018 (Revised) SilverRock Development Company, Inc. 3551 Fortuna Road Encinitas, California 92024 Project: Proposed Temporary Clubhouse SilverRock Resort Property SWC Avenue 52 and Jefferson Street La Quinta, California Subject: Geotechnical Update Project No. 544-14059 18-04-187 Ref: Geotechnical Investigation report prepared by Sladden Engineering dated February 10, 2017; Project No. 544-14059, Report NO. 17-01-011 In accordance with your request, we have reviewed the above referenced Geotechnical Investigation report as it relates to the design and construction of the proposed temporary clubhouse facility. The revised location of the temporary clubhouse is located within the west central portion of the SilverRock Resort property just north of the existing Ahmanson House building in the City of La Quinta, California. The proposed location of the temporary clubhouse is indicated on the attached site plan. It is our understanding that the proposed temporary clubhouse facility will consist of pre -manufactured modular units supported by conventional shallow spread footings and/or temporary manufactured pad foundations. The referenced Geotechnical Investigation report includes recommendations pertaining to the design and construction of residential and resort/hotel structure foundations. Based upon our review of the referenced report and our understanding of the proposed temporary clubhouse construction, it is our opinion that the recommendations included in the referenced Geotechnical Investigation report remain applicable except as amended herein. The structural values included in the referenced report should be appropriate for use in the design of any conventional shallow spread footings proposed for temporary structure support. The recommended structural values are summarized below. Conventional spread footings are expected to provide adequate support for the proposed temporary clubhouse structures. All footings should be founded upon properly compacted engineered fill material and should have a minimum embedment depth of 12 inches measured from the lowest adjacent finished grade. Continuous and isolated footings should have minimum widths of 12 inches and 24 inches, respectively. Continuous and isolated footings supported upon properly compacted soil may be designed using allowable (net) bearing pressures of 1800 and 2000 pounds per square foot (psf), respectively. Sladden Engineering tvivtv.Sladdeueagiaeering. tout May 1, 2018 -2- Project No. 544-14059 18-04-187 The allowable bearing pressure applies to combined dead and sustained live loads. The allowable bearing pressures may be increased by one-third when considering transient live loads, including seismic and wind forces. All footings should be reinforced in accordance with the project structural engineer's recommendations. Lateral load resistance for the spread footings will be developed by passive pressure against the sides of the footings below grade and by friction acting at the base of the footings. An allowable passive pressure of 250 psf per foot of depth may be used for design purposes. An allowable coefficient of friction 0.40 may be used for dead and sustained live loads to compute the frictional resistance of footings placed directly on compacted fill. Under seismic and wind loading conditions, the passive pressure and frictional resistance may be increased by one-third. Temporary pre -manufactured footings and jack support systems designed in accordance with manufacturer's specifications may also be expected to provide adequate support for the modular clubhouse buildings. Lateral restraint systems designed in accordance with the manufacturer of the modular unit specifications may also be expected to provide for adequate lateral support. The recommendations provided in the preceding paragraphs are based on the assumption that all footings will be supported upon properly compacted engineered fill soil. Prior to the placement of the reinforcing steel and concrete, we recommend that the footing excavations be inspected to verify that they extend into the firm compacted soil and are free of loose and/or disturbed materials. Settlements may result from the anticipated foundation loads. These estimated ultimate settlements are calculated to be a maximum of 1 inch when using the recommended bearing values. As a practical matter, differential settlements between footings can be assumed as one- half of the total settlement. These elastic settlements are expected to occur during construction. The bearing soil is non -expansive and falls within the "very low" expansion category in accordance with 2016 California Building Code (CBC) classification criteria. Slab thickness and reinforcement should be determined by the Structural Engineer. We recommend a minimum floor slab thickness of 4.0 inches for any conventional slabs on grade. All slab reinforcement should be supported on concrete chairs to ensure that reinforcement is placed at slab mid -height. The seismic design category for a structure may be determined in accordance with Section 1613 of the 2016 CBC or ASCE7. According to the 2016 CBC, Site Class D may be used to estimate design seismic, loading for the proposed structure. The 2016 CBC Seismic Design Parameters are summarized on the following page. Sladden Engineering wiviv.Sladderrengineeririg. corn May 1, 2018 Risk Category (Table 1.5-1): I/II/I11 Site Class (Table 1613.3.2): D Ss (Figure 1613.3.1): 1.500g S1 (Figure 1613.3.1): 0.641g Fa (Table 1613.3.3(1)):1.0 Fv (Table 1613.5.3(2)): 1.5 Sms (Equation 16-37 [Fa X Ss)):1.500g Smi (Equation 16-38 [Fv X Si)): 0.961g SD5 (Equation 16-39 [2/3 X Sms)): 1.000g SDI (Equation 16-40 12/3 X Sm1}): 0.641g Seismic Design Category: D -3- Project No.544-14059 18-04-187 If you have questions regarding this letter or the referenced report, please contact the undersigned. Respectfully submitted, SLADDEN ENGINEERING Brett L. Anderson — � '1 " li Principal Engineer ( t Q- �\ 7 c�' L. SER/gvm 9iLut CNIL ENGINEERING Copies: 4 / Addressee Sladden Engineering wwiv.Sladdeirengineering.com syI-(— I K(:)S`f Please verify that soils reports contain all of the above information. In addition, to assure continuity between the investigation/reporting stage and the execution stage, please use the following checklist to verify that the conclusions and recommendations in the report cover all the required elements. Only then can we be assured that the construction documents address all of the site soil conditions. La Quinta Oeotechnical Report Checklist Does the "Conclusions and Recommendations" section of the report address each of the following criteria? "Address" means: (a) the criterion is considered significant and mitigation measure(s) noted, or; (b) the criterion is considered insignificant and explicitly so stated. Y No Criterion ® Foundation criteria based upon bearing capacity of natural or compacted soil. ® Foundation criteria to mitigate the effects of expansive soils. ® Foundation criteria based upon bearing capacity of natural or compacted soil. ® Foundation criteria to mitigate the effects of liquefaction. ® Foundation criteria to mitigate the effects of seismically induced differential settlement. ® Foundation criteria to mitigate the effects of long-term differential settlement - El Foundation criteria to mitigate the effects of varying soil strength, 1W ® Foundation criteria to mitigate expected total and differential settlement. Any "No" answers to the above checklist should be noted as specific required corrections. 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Appendix F Structural BMP and/or Retention Facility Sizing Calculations and Design Details Per Section V.1 of this report: Since the project will be required to retain urban runoff onsite in conformance with local ordinance (see Table 6, Permittees Requiring Onsite Retention of Stormwater, of the Whitewater River Region WQMP), Site Design and Treatment Control BMPs are not required. This project is utilizing the existing infiltration area within the low-lying golf course area, and the existing catch basin and Drywell near the project. There are no significant changes in the runoff retention for this project. 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Appendix G AGREEMENTS - COVENANT AND AGREEMENTS, BMP MAINTENANCE AGREEMENTS AND/OR OTHER MECHANISMS FOR ENSURING ONGOING OPERATION, MAINTENANCE, FUNDING AND TRANSFER OF REQUIREMENTS FOR THIS PROJECT -SPECIFIC WQMP RECORDING REQUESTED BY AND WHEN RECORDED MAIL TO: CITY OF LA QUINTA CITY CLERK 78795 CALLS TAMPICO LA QUINTA, CA 92253 APN: 777490-007 Space above this line for Recorder's use (Exempt from recording fees pursuant to Government Code Sections 6103 and 27383) STORM WATER MANAGEMENT / BMP FACILITIES AGREEMENT NO.2019-001 THIS AGREEMENT, is made and entered into this day of Janjgu 20q, by and between SilverRock Development Company, LLC, hereinafter called the -Landowner" and the City of La Quinta, hereinafter called the "City". RECITALS WHEREAS, the Landowner is the owner of certain real property describe as Parcel I of Parcel Map 37207, as recorded by deed in the land records of Riverside County, California, Map Book 242, Pages 72-87, with an address of 79087 Ahmanson Lane, La Quinta, CA and APN: 777-490-007 , in the City of La Quinta, County of Riverside, State of California, hereinafter called the "Property," and more particularly and legally described in Exhibit "A" and depicted in Exhibit "B," both attached hereto and each of which exhibits made a part hereof by this reference; and WHEREAS, the City is subject to the Riverside Countywide National Pollutant Discharge Elimination System ("NDDES") Municipal Stormwater Permit issued by the State Water Resources Control Board — Colorado River Region No. 7 ("NPDES Permit"), and WHEREAS, pursuant to the NPDES Permit ant the City's Stormwater Management and Discharge Controls Ordinance (codified as Chapter 8.70 of the La Quinta Municipal Code) ("Ordinance"), all new development must implement storm water treatment devices, fund the perpetual maintenance of those devices, and enter into an agreement with the City stating that the landowner, his successors, heirs, and assigns, will maintain the devices, grant a right of entry to City staff for inspections, and agree to pay the cost of such City inspections; and WHEREAS, the Landowner is proceeding to build on and develop the Property; and WHEREAS, the Site Plan known as SilverRock Resort Temporary Clubhouse (hereinafter called the "Plan,') as approved or to be approved by the City, provides for the installation of permanent stormwater management and pollution prevention measures (the `BMP facilities") �� ithin the confines of the Property; and WHEREAS, the Ordinance requires the proper operation and maintenance of the BMP facilities constructed on the Property; and WHEREAS, the NPDES Permit, the Ordinance, and the development conditions of approval require that the BMP facilities, as shown on the approved Plan, be constructed and properly operated and maintained by the Landowner; and WHEREAS, the City and the Landowner, on behalf of itself and is successors, heirs and assigns, including any homeowners association, agree that the health, safety, and welfare of the residents of the City of La Quinta require that the on -site BMP facilities (catch basin, underground detention pond, manholes, storm drain pipes and outlet structures) be constructed and maintained by the Landowner, its successors, heirs, and assigns, including, but not limited to, any homeowners association; and WHEREAS, this Agreement memorializes the Landowner's maintenance, operations, and inspection obligations under the City's Ordinance and the approved Plans. COVENANT NOW THEREFORE, in consideration of the foregoing recitals, the mutual covenants contained herein, and the following terms and conditions, the parties hereto agree as follows: 1. The on -site BMP facilities described above shall be constructed by the Landowner, its successors, heirs, and assigns, in accordance with the plans and specifications identified in the Plan. 2. The Landowner, its successors, heirs, and assigns, including any homeowners association, shall adequately maintain the BMP facilities, including, but not limited to, all pipes and channels built to convey storm water to the facility, as well as all structures, catch basin inserts, underground detention ponds, improvements, and vegetation provided to control the quantity and quality of the storm water. Adequate maintenance is herein defined as good working condition so that these facilities are performing in their design functions. 3. The Landowner, its successors, heirs, and assigns, shall annually inspect the BMP facilities described above by March of each year and shall submit an inspection report annually to the Public Works Department by April 1 st of each year. The purpose of the inspection is to assure safe and proper functioning of the facilities. The inspection shall cover the entire facilities, catch basins, berms, outlet structure, pond areas, access roads, etc. Deficiencies shall be clearly noted in the inspection report. 4. The Landowner, on behalf of itself and its successors, heirs, and assigns, hereby grants permission to the City, its authorized agents and employees, to enter upon the Property and to inspect the BMP facilities whenever the City deems necessary to enforce the provisions of the NPDES Permit, the Ordinance or this Agreement or is required to do so by the NPDES Permit. The purpose of such inspection is to follow up on reported deficiencies and/or to respond to citizen complaints, and meet the requirements of the NPDES Permit. The City may enter the Property at any reasonable time to inspect the BMP facilities and their operation, to inspect and copy records related to storm water compliance, and to collect samples and tax measurements. Whenever -2 possible, the City shall provide notice prior to entry. The City shall provide the Landowner, its successors, heirs, and assigns, copies of the inspection findings and a directive to commence with any repairs if necessary. 5. In the event the Landowner, its successors, heirs, and assigns, fails to maintain the BMP facilities in good working condition and in accordance with the NPDES Permit and the City's ordinance, the City, upon prior notice, may enter upon the Property and take whatever steps it deems necessary to correct deficiencies identified in any inspection report to return the BMP facilities to good working order and charge the costs of such repairs to the landowner, its successors, heirs, and assigns. Nothing in this Section 5 shall be construed to allow the City to erect any structure of permanent nature on the land of the Landowner outside of the easement for the BMP facilities; nor shall any provision herein be construed to impose any obligation on the City to maintain or repair the BMP facilities. It is expressly understood and agreed that the Landowner, its successors, heirs, and assigns, including any homeowners association are responsihle for maintaining and repairing the BMP facilities on the Property. and the Go is under no obligation to routinely maintain or repair said facilities. 6. The Landowner, its successors, heirs, and assigns, shall perform the work necessary to keep these facilities in good working order as appropriate. In the event a maintenance schedule for the BMP facilities (including sediment removal) is outlined on the approved Plan, the schedule shall be followed. In the future, the City may adopt an annual Stormwater Inspection Fee that will be assessed to the Property. 7. In the event the City, pursuant to this Agreement, performs work of any nature, or expends any funds in performance of said work for labor, use of equipment, supplies, materials, and the like, the Landowner, its successors, heirs, and assigns, shall promptly reimburse the City upon demand for all costs incurred by the City in taking such action. The City will provide the Landowner, its successors, heirs, and assigns, with an itemized invoice of the City's costs and the Landowner shall pay the invoice within thirty (30) days. If the Landowner, its successors, heirs, and assigns, fails to pay the invoice within thirty (30) days, the City may secure a lien against the Property in the amount of such costs. In addition, the City may make the cost of abatement of the nuisance caused by the failure to maintain the BMP a special assessment against the Property that may be collected at the same time and in the same manner as ordinary municipal taxes are collected as provided in Government Code section 38773.5. Nothing in this Section 7 shall prohibit the City from pursuing other legal recourse against the Landowner. 8. This Agreement imposes no liability of any kind, whatsoever on the City. The Landowner, on behalf of itself and its successors, heirs, and assigns, agrees to defend, indemnify, and hold harmless the City, its officials, employees, and authorized agents, from any and all liability, damages, accidents, casualties, occurrences or claims whatsoever that may arise or be asserted against the City and which are in any way connected with the construction, operation, presence, existence, or maintenance of the BMP facilities by the Property Owner or the failure of the same, or from any personal injury or property damage that may result from the City or other public entities entering the Property under Section 4 or 5. The Landowner, its successors, heirs, and assigns, shall maintain liability insurance specifically covering the BMP facilities and the City. -3 9. The Landowner, its successors, heirs, and assigns shall maintain liability insurance specifically covering the BMP facilities and the City using Insurance Services Office "Commercial General Liability" policy form CG 00 01, with an edition date prior to 2004, or the equivalent. Coverage for an additional insured shall not be limited to its vicarious liability. Defense costs must be paid in addition to limits. Limits shall be no less than $1,000,000 per occurrence for all covered losses and no less than $2,000,000 general aggregate. The Landowner agrees to provide evidence of the insurance required herein, satisfactory to the City, consisting of. (a) a certificate of insurance evidencing the coverage required and (b) an additional insured endorsement to the general liability policy. The additional insured endorsement shall expressly name the City, its officers, and employees as additional insureds on the policy with respect to liabilities arising out of the Landowner's maintenance, operations, and inspection obligations under the City's Ordinance and the approved Plans. Proof of compliance with these insurance requirements, consisting of endorsements and certificates of insurance, shall be delivered to City prior to execution of this Agreement, and on an annual basis thereafter for the term of this Agreement. 10. This Agreement shall be recorded in the Official Records of the County of Riverside. The covenants set forth herein shall run with the land, and the burdens thereof shall be binding upon each and every part of the Property and upon the Landowner, its administrators, executors, assigns, heirs, and any other successors in interests, including any homeowners association, in ownership (or any interest therein), for the benefit of the Property and its storm facilities and each and every part thereof and said covenants shall inure to the benefit of and be enforceable by the City, its successors and assigns in ownership of each and every part of the Property and storm water facilities. IF TO CITY: City of La Quinta 78495 Calle Tampico La Quinta, CA 92253 Attn: Bryan McKinney_ City En ig neer Phone: 760-777-7175 IF TO OWNER: SilverRock Development Company, LLC 3551 Fortuna Ranch Road Encinitas, CA 92024 Attn: Robert S. Green, President Phone: 760-634-6543 — THIS SPACE INTENTIONALLY LEFT BLANK — SIGNATUKES BEGIN ON NEXT PAGE -4 WITLESS the following signatures and seals: LANDOWNER Bv: `I Name:'12/ V P lease Print LANDOWNER By: Name: Title: AN ll / fkk Title: ATTEST:: Name: Please Print Title: Notary must attach an "All -Purpose Acknowledgement" ATTEST: Bv: Monika Radeva City Clerk, City of La Quinta Please Print (Seal) CITY OF LA QUINTA By: Frank J. Spevacek City Manager, City of La Quinta APPROVED AS TO FORM: By: William H. Ihrke City Attorney, City of La Quinta All signatures on this Agreement on behalf of the Owner must be acknowledged before a Notary Public. In the event that the Owner is a corporation, the President/Vice President and the corporate secretary of the corporation must sign and the corporate seal must be affixed thereto. CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT CIVIL CODE § 1189 A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which this certificate is attached, and not the truthfulness, accuracy, or validity of that document. State of California ) County of Liz, Ati:4) ) On 5n-\ 2111, U, `l before me, 0,vk45, AW C ofb Date Here Insert Name and TWdof the Officer personally appeared NameWof who proved to me on the basis of satistactory evidence to be the person(Ff whose name(S) is/apt subscribed to the within instrument and acknowledged to me that he/skE/th6 executed the same in his/hvf/t it authorized capacity(i 9j, and that by his/hef/their signature(Q on the instrument the person(y). or the entity upon behalf of which the person(,wjacted, executed the instrument. I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct. CHARLES ABEL CETTO WITNESS my hand and official seal. NOTARY PUBLIC - CALIFORNIA COMMISSION 4112108440 LOS ANGELES COUNTY Nty Comm. Exp. April 24, 201Y Signature Signature of Notary Public Place Notary Seal Above OPTIONAL Though this section is optional, completing this information can deter alteration of the document or fraudulent reattachment of this form to an unintended document ( Description of Attached Document Title or Type of Document: Number of Pages: Signer(s) Other Capacity(ies) Claimed by Signer(s)/ Signer's Name: Corporate Officer — I itle(s): 0 Partner — ❑ Limit I General ❑ Individual J Attorney in Fact ❑ Trustee �- Guardian or Conservator ❑ Oth Signer Is Representing: Document Date: amed Above: Signer's Name: Corporate O - er — Title(s): El ❑ Part — ❑ Limited J General ❑ I vidual - Attorney in Fact rustee — Guardian or Conservator ❑ Other: Signer Is Representing: 02014 National Notary Association • www.NationaiNotary.org • 1-800-US NOTARY (1-800-876-6827) Item #5907 A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document, to which this certificate is attached, and not the truthfulness, accuracy, or validity of that document State of California County of Riverside On , before me, , (insert name and title of the officer) Notary Public, personally appeared , who proved to me on the basis of satisfactory evidence to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon behalf of which the person(s) acted, executed the instrument. I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct. WITNESS my hand and official seal. Signature, In (Seal) EXHIBIT A (LEGAL DESCRIPTION Parcel I of Parcel Map 37207, PMB 242, Pages 72-87, located within Section 5, 6, 7, and 8, Township 6 South, Range 7 East, S. B. M., in the City of La Quinta, County of Riverside, State of California. Records of Riverside County, State of California. APN: 777-490-007 (City Clerk, City of La Quinta, No. 2017-0175532) EXHIBIT A EXHIBIT B (MAP/ILLUSTRATION) EXHIBIT B EXHIBIT "B" - MAP PARCEL 1, PM 37207, PMB 242172-78 1000 500 0 1CGG 2 0, SCALE: 1 "=1000' PARCEL 1 PM 37207 PMB 242172-87 SHEET 1 OF 1 Sheetsl INTERNATIONAL 75410 Gerald Ford Drive, Suite 100 Palm Desert, CA 92211 LOCATED IN PORTIONS OF SECTIONS 5-8, T.6S., R.7E., S.B.M. phone:760-346-7481 www.mbakerintl.com H \PDATA\152669\C ADD \I. AND \E*081 TS\TFNP-CLU8HOUSF(3)\F XHI®T B\PARUL1-PU37207.DWG OSCAR.RODAS 1/11/19 12:49 pm IKI 1c'7r'Fp 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Appendix H PHASE I ENVIRONMENTAL SITE ASSESSMENT - SUMMARY OF SITE REMEDIATION CONDUCTED AND USE RESTRICTIONS COMPLIANCE WITH CALIFORNIA ENVIRONMENTAL QUALITY ACT CE A The Design and Development Department has determined that this project is consistent with Environmental Assessment 2014-1003 and no further environmental review is required. The SilverRock Specific Plan includes provisions for relocatable buildings for golf course uses and was analyzed as part of Environmental Assessment 2014-1003. 2015 Whitewater River Region WQMP SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Appendix I PROJECT -SPECIFIC WQMP SUMMARY DATA FORM Project -Specific WQMP Summary Data Form Applicant Information Name and Title Dan Koravos, P.E., Project Manager Company Michael Baker International Phone 760 346-7481 Email Dan.Koravos@mbakerintl.com Project Information Project Name (as shown on project application/project-specific WQMP) SilverRock Resort Temporary Clubhouse (Por. of Parcel 1, PM 37207) Street Address 79087 Ahmanson Lane, La Quinta, CA 92253 Nearest Cross Streets SW Corner of SilverRock Way and Ahmanson Lane Municipality (City or Unincorporated County) LA Quinta Zip Code 92253 Tract Number(s) and/or Assessor Parcel Number(s) 777-490-007 Other (other information to help identify location of project) Indicate type of project. Priority Development Projects (Use an "X" in cell preceding project type): SF hillside residence; impervious area > 10,000 sq. ft.; Slope > 25% SF hillside residence; impervious area > 10,000 sq. ft.; Slope > 10% & erosive soils x Commercial or Industrial > 100,000 sq. ft. Automotive repair shop Retail Gasoline Outlet disturbing > 5,000 sq. ft. Restaurant disturbing > 5,000 sq. ft. Home subdivision > 10 housing units x Parking lot > 5,000 sq. ft. or > 25 parking spaces Date Project -Specific WQMP Submitted November 2018 Size of Project Area (nearest 0.1 acre) 3.0 Acres Will the project replace more than 50% of the impervious surfaces on an existing developed site? No Project Area managed with LID/Site Design BMPs (nearest 0.1 acre) 2.2 Acres is Permeable and 0.8 Acre is Non -Permeable surface Are Treatment Control BMPs required? No Is the project subject to onsite retention by ordinance or policy? Yes Did the project meet the 100% LID/Site Design Measurable Goal? Yes Name of the entity that will implement, operate, and maintain the post -construction BMPs City of La Quinta Contact Name Bryan W. McKinney, City Engineer Street or Mailing Address 78-495 Calle Tampico City La Quinta, CA Zip Code 92253 Phone 760-777-7045 Space Below for Use by City/County Staff Only Preceding Information Verified by (consistent with information in project -specific WQMP) Name: Date: Date Project -Specific WQMP Approved: Data Entered by Name: Date: Other Comments