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TTM 36744 Preliminary WQMPWhitewater River Region WQMP Project Specific Preliminary Water Quality Management Plan For: The Estates at Griffin Lake (Tract Map No. 36744) Avenue 54, La Quints, CA 92253 DEVELOPMENT NO. TRACT MAP NO. 36744 SDP 2014-1003 PREPARED FOR: Griffin Ranch Investors, LP 23 Corporate Plaza, Suite 150 Newport Beach, CA 92660 Telephone: (949) 629-2580 PREPARED UNDER THE DIRECT SUPERVISION OF: Julian De La Torre, Principal Engineer MSA Consulting, Inc. 34200 Bob Hope Drive Rancho Mirage, CA 92270 Telephone: (750) 320-9811 WQMP Preparation/Revision Date: December 15, 2014 Whitewater Rimer Region WQMP Tract Map No. 36744 OWNER'S CERTIFICATION This project -specific Final Water Quality Management Plan (WQMP) has been prepared for: Griffin Ranch InveStorS, LP by MSA Consulting, Inc. for the project known as the Tract Map No. 36744, SDP 2014-1003 in the City of La Quinta, CA 92263. This WQMP is intended to comply with the requirements of La Quinta for Tract Map No. 36744, which includes the preparation and implementation of a project -specific WQMP. The undersigned, while owning the propertylproject described in the preceding paragraph, shall be responsible for the implementation of this WQMP and will ensure that this WQMP is amended as appropriate to reflect up-to-date conditions on the site. This WQMP will be reviewed with the facility operator, facility supervisors, employees, tenants, maintenance and service contractors, or any other parry (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 of this WQMP. The undersigned is aware that implementation of this WQMP is enforceable under City of La Quinta Water Quality Ordinance 493 (La Quints Municipal Code Municipal Code Section 8.70). If the undersigned transfers its interest in the subject property/project, the undersigned shall notify the successor in interest of its responsibility to implement this WQMP. "I, the undersigned, certify under penalty of law that I am the owner of the property that is the subject of this WQMP, and that the provisions of this WQMP have been reviewed and accepted and that the WQMP will be transferred to future successors in interest." o be Provided in the Fina! WQMP ATTEST Owner's Signature (To be provided in the Final WOMP) Owner's Printed Name (To be provided in the Final WQMP) Owner's Title/Position CTo be provided in the Final WQMP) Date Notary Signature Printed Name Title/Position Date THIS FORM SHALL BE NOTARIZED BEFORE ACCEPTANCE OF THE FINAL PROJECT SPECIFIC WQMP December 15, 2014 Whitewater River Region WQMP Tract Map No. 36744 Contents SECTION PAGE I. Project Description......................................................................................................................1 II. Site Characterization.............................................,..........,........,..........,......................................6 III. Pollutants of Concern.................................................................................................................. S IV. Hydrologic Conditions of Concern..........................................................................................11 V. Best Management Practices......................................................................................................13 V.1 SITE DESIGN AND TREATMENT CONTROL BMPS............................................................. 13 V.I .A SITE DESIGN BMPS................................................................................................. 14 V.I .B TREATMENT CONTROL BMPS................................................................................21 V. LC MEASUREABLE GOAL SUMMARY ..................... ...................................................... 23 V.2 SOURCE CONTROL BMPS................................................................................................. 24 V.3 EQUIVALENT TREATMENT CONTROL ALTERNATIVES...................................................... 26 VA REGIONALLY -BASED TREATMENT CONTROL BMPS........................................................ 26 VI. Operation and Maintenance Responsibility for BMPs......................................................... 27 VII. Funding.......................................................................................................................................29 TABLES TABLE 1. POLLUTANT OF CONCERN SUMMARY S TABLE 2. BMP SELECTION MATRIX BASED UPON POLLUTANT REMOVAL EFFICIENCY 14 TABLE 3. IMPLEMENTATION OF SITE. DESIGN CONCEPTS 16 TABLE 4. SITE DESIGN 13MPS MEETING THE MEASUREABLE GOAL IN WQMP SECTION 3.5.1.1 20 TABLE 5: TREATMENT CONTROL BMP SUMMARY 22 TABLE 6: MEASUREABLE GOAL SUMMARY 23 TABLE 7. SOURCE CONTROL BMPS 24 APPENDICES A. CONDITIONS OF APPROVAL (TO BE PROVIDED) B, VICINITY MAP, WQMP SITE PLAN, AND RECEIVING WATERS MAP C. SUPPORTING DETAIL RELATED TO HYDRAULIC CONDITIONS OF CONCERN (IF APPLICABLE) D. EDUCATIONAL MATERIALS E. SOILS REPORT F. SITE DESIGN AND TREATMENT CONTROL BMP SIZING CALCULATIONS AND DESIGN DETAILS G. AGREEMENTS —CC&RS, COVENANT AND AGREEMENTS AND/OR OTHER MECHANISMS FOR ENSURING ONGOING OPERATION, MAINTENANCE, FUNDING AND TRANSFER OF REQUIREMENTS FOR THIS PROJECT -SPECIFIC WQMP (TO BE PROVIDED) H. PHASE 1 AND PHASE II ENVIRONMENTAL SITE ASSESSMENT (NOT AVAILABLE) PROJECT -SPECIFIC WQMP SUMMARY DATA FORM December 15, 2014 Whitewater River Region WQMP Tract Map No. 36744 I. Project Description Project Owner: Griffin Ranch Investors, LP C/O Mark Majer 23 Corporate Plaza, Suite 150 Newport Beach, CA 92660 Telephone: (949) 629-2580 WQMP Preparer: Milan De LaTorre, Principal Engineer Project Site Address: Planning Area: Community Name: Development Name: APN Number(s): Thomas Bros. Map: Project Watershed: Sub -watershed: Project Site Size: 34200 Bob Hope Drive Rancho Mirage, CA 92270 Telephone: (760) 320-9811 South of Avenue 54; East of Madison Street La Quinta, CA 92253 Coachella Valley Planning Area City of La Quinta Mery Griffin Estates 767-320-013 Page 5530, grid D3 (2007 Riverside County Edition) Whitewater River Whitewater River Channel, Coachella Valley Storm Channel 39.8 acres Standard Industrial Classification (SIC) Code: Not applicable to residential uses. Formation of Home Owners' Assodation (HDA) or Property Owners Association (POA): December 15, 2014 Whitewater River Region WQMP Tract Map No. 36744 Additional Permits/Approvals required for the Project: AGENCY Permit required State Department of Fish and Game, 1601 Streambed Y ❑ N® Alteration Agreement State Water Resources Control Board, Clean Water Act Y ❑ N® (CWA) Section 401 Water Quality Certification US Army Corps of Engineers, CWA Section 404 permit Y ❑ N® US Fish and Wildlife, Endangered Species Act Section 7 y ❑ N® biological opinion Other City of La Quinta Grading Permit Y ® No City of La Quinta Building Permit Y ® N❑ 5V*RCB General Construction Permit Y ® N❑ • The proposed project activity will not divert or obstruct the natural flow or change the bed, channel, or bank of any stream, river or lake. Therefore, a State Department of Fish and Game, 1601 Streambed Alteration Agreement is not required. • The proposed project activity will not result in direct discharge into navigable waters; therefore, a Clean Water Act Section 401 Water Quality Certification permit is not required. • The proposed facility will not result in the discharge of dredged or fill materials into the waters of the United States, including wetlands. A Clean Water Act Section 404 Permit is not required for this project. • The proposed project site is not recognized as a habitat of an endangered species nor does it form part of a Conservation Area under the Coachella Valley Multiple Species Habitat Conservation Plan. A U.S. Fish and Wildlife, Endangered Species Act Section 7 biological opinion is not required for this project. December 15, 2014 2 Whitewater River Region WQMP Tract Map No. 36744 Introduction and Purpose. The purpose of this Water Quality Management Plan (WQMP) is to demonstrate how Tract Map No. 36744 (The Estates at Griffin Lake) complies with the applicable requirements of the Municipal Separate Storm Sewer System (MS4) within the Whitewater River Watershed (Order No. R7-2013-0011 and NPDES No. CAS617002). Project Location and Existing Conditions The project property (APN 767-320-013) encompasses a tributary area of approximately 39 acres, situated south of Avenue 54 and approximately one-quarter mile east of Madison Street in the City of La Quinta, County of Riverside, California. Its location can also be described as a portion of Section 15, Township 6 South, Range 7 East, San Bernardino Base and Meridian. The project site is currently developed as an equestrian compound commonly recognized as the Mery Griffin Estate (estate). The northern portion of the property includes a main house, four separate casitas, staff quarters, stables, storage and maintenance facilities, one pool and a 2.5 - acre lagoon. Alfalfa was grown in the center of the track. A windbreak of Tamarisk trees follows the east, west and south boundaries. The property also contains a well and water holding tank used historically to provide potable water to the home, irrigation for the grounds and a water supply for the existing 2.1 -acre lake. Avenue 54, which fronts the property on the north, is fully improved to its ultimate width. The property is enclosed by an existing block wall which has access to 54th Avenue at two separate locations with existing curb cuts. The stretch of wall along Avenue 54 is 8 -feet high atop a 3 -foot berm and was approved for construction in November of 2005. Site topography slopes gently to the southeast from a high elevation of 490.4 feet at the northwest property corner to a low elevation of 484.3 feet at the southeast property corner. The project property is bordered by Avenue 54 to the north, beyond which is a golf course residential community. To the east, south and west, the project is bordered by a residential subdivision presently undergoing phased construction. The project property is elevated above the existing surrounding development, which bounds the site on the west, south and east sides, preventing flows from entering from those directions. Avenue 54 runs along the site's northern side, directing flows past the project. Project Description The project consists of 78 new residential homes, all on minimum 14,004 square -foot lots. At the northwest corner of the property, a 5 -acre lot, will preserve the existing residential structure, outbuildings, pool and patio areas, stables, corrals and pasture areas. Vehicular access to the site will be provided via entries on Avenue 54 to effectively serve both the estate and the residential community. The westerly entry will act as the primary access to the estate and a secondary entry for neighborhood residents and their guests. It is designed to allow separate, gated access to the estate and residential components off a central turning circle. The easterly entry is also gated December 15, 2014 3 Whitewater River Region WQMP Tract Map No. 38744 and, as the most direct route into the residential community, will be the primary access used regularly by neighborhood residents. Each entry provides two lanes of travel in each direction and sufficient stacking distance to accommodate traffic entering the project. The vehicular circulation system consists of an interior network of private streets that connect each home to the public roadway system at Avenue 54. Private streets are 40 feet wide with 10 -foot wide public utility easements on either side. The interior private street section accommodates parking on both sides. Pedestrian circulation is accommodated by 40 foot wide, low speed, low volume private streets as is common in desert communities. Although no sidewalks will be installed, streets will allow pedestrians to easily and safely access the community center, lake and public sidewalk system on Avenue 54 by walking, biking or electric vehicles. The project includes a six -acre lake for recreational use by residents and guests of the community and the Estate. The operation of small sailboats, electric boats and human powered watercraft (paddle boats, canoes, kayaks) will be allowed, however, swimming will not. There will be docking stations dispersed throughout the lake, and residential lots with lake frontage will be allowed to add a personal dock for their electric or paddle boats. A community center provides opportunities for active recreation to all residents, including boating. The lake is equipped with a water recirculation and aeration system to serve as a water treatment mechanism. Proposed Storm Drain Improvements The project has a total tributary area of 39.79 acres, which includes tributary off-site flows from a southern portion of the street right-of-way dedication on Avenue 54, north of the project. For hydrology purposes, the total tributary area is divided into two sub drainage areas: A and B. Drainage Area A encompasses 1.38 acres, including a portion of the estate and surrounding facilities near the northwest corner of the property. Drainage Area B encompasses 38.41 acres, including a southern portion of the street right-of-way on Avenue 54. The City of La Quinta policy for this project area requires that the entirety of the runoff generated by the 100 -year design storm shall be captured and stored on-site. In the proposed design, all storm runoff generated on-site will be conveyed via surface flow on the local street system from the residential lots to the project's private lake, which also functions as a retention basin. Specifically, runoff produced in Drainage Area A will be conveyed via surface flows to the north edge of the lake. Runoff from the larger tributary area (B) will be discharged primarily via 3 drainage channels within 5 -foot drainage easements. The proposed drainage channels will be lined with 3 -inch cobble stone to a depth of 12 inches and width of 2.5 feet. These channels will have steel grated covers to allow residents to walk on top of the grates from their side yards. A 7.5 -foot wide strip of ungrouted rip rap will be placed from the end of the drainage channel to the edge of the lake. The purpose of the proposed cobble and ungrouted rip rap is to substantially December 15, 2014 4 Whitewater River Region WQMP Tract Map No. 36744 reduce the amount of sediment and debris potentially conveyed in the project's runoff. This cobble stone would help capture and retain sediment, landscape debris and other particles produced at the single-family residential lots, preventing them from discharging into the lake. Runoff from an eastern and northern portion of Drainage Area A will undergo a different form of pre-treatment before being discharged at the project lake. This street runoff, which includes the off-site portion on Avenue 54, will be accepted at multiple street catch basins on one of the project's private interior streets, then conveyed via underground storm drain lines to a proposed drywell system situated near the southern edge of the pake. The drywell system is designed prevent the potential pollutants associated with nuisance and first -flush flows from affecting the proximate receiving waters. The system's removal effectiveness primarily addresses trash and debris; oxygen demanding substances/organic compounds; hydrocarbons; oils and grease; nutrients; heavy metals; and total suspended solids (TSS). The storage above the lake's normal high water elevation will be sufficient to store the runoff from the 100 -year design storm, including the first -flush volume. The lowest pad elevation will be set a minimum of one foot above the lake's 100 -year design storm high water elevation. Since the proposed lake will be lined, no lake percolation will occur. Any increase in the lake's water elevation will be consumed over time primarily via daily irrigation use. The proposed lake is more than adequately sized to retain the entirety of the 100 -year design storm for each drainage area within the 6 inch freeboard of the lake and the slope of the shore. As a result of the retention capacity offered by the project no hydrologic conditions of concern or impacts to the receiving waters are expected. The lake system improvements include a filtration/aeration system to circulate the water and prevent vector control issues. Locution of Operations and Activities: The project does not have a specific area where heightened pedestrian or vehicular circulation would warrant additional site design, source control or treatment measures other than those provided for the project as a whole. Waste Generation.- The eneration;The proposed project is expected to generate primarily non -hazardous solid waste typical of residential uses. All forms of non -hazardous waste will be mitigated by on-site common area maintenance, residential waste reduction and recycling measures implemented as part of Waste Management Services. December 15, 2014 5 Whitewater River Region WQMP Tract Map No, 36744 II. Site Characterization Existing and Proposed General Plan Land Use Designation: Low Density (LDR) Existing Zoning: Low Density Residential Proposed Zoning: Estates At Griffin Lake Specific Plan Current Property Use: Residential Proposed Property Use: Low Density Residential Availability of Soils Report: Y ® N ❑ Note: Soils report is provided in Appendix E. Phase 1 Site Assessment: Y ❑ NZ Note: ff prepared, attached remediation summary and use restrictions in Appendix H. December 1S, 2414 6 Whitewater River Region WQMP Tract Map No. 38744 Receiving Waters for Urban Runoff from Site Receiving Waters 303(d) List Impairments Designated Beneficial Uses Proximity to RARE Beneficial Use Coachella pathogens, Toxaphene, Valley Storm Dieldrin DOT FRSH, REC I b, REC II b, pp y 5.8 Approximately Water (pichlarodlphenyltrlchloroethane} WARM, WILD, RARE c miles. Channel PCBs (Polychlorinated Biphenyls) The preceding table is based on the 2010 Integrated Report {Clean Water Act Section 303(d) List/305(b) Report. Abbreviations: I — Intermittent Beneficial Use FRSH — Freshwater Replenishment REC I — Water Contact Recreation REC II — Non -Contact Water Recreation WARM— Warm Freshwater Habitat WILD— Wildlife Habitat RARE — Preservation of Rare, Threatened, or Endangered Species MUN—Municipal & Domestic Supply AGA — Agricultural Supply GWR— Groundwater Recharge AQUA — Acuaculture COLD — Cold Freshwater Habitat POW — Hydropower Generation a. tccfiun of -perennial 1loW fro€il a1lPrO.Ni UIC'I] fildlil10 01C Saltnn Sca. b. Unauthorized use. c. Rare, endangered, or threatened wildlife exists in or utilizes some of this waterway. d, I31CIUdcs the,ect.ion off]o;,tion the hendwalters in th,c San Cor_eon;o Vlouniains to (and inciLKlinLo the Whilc��,aTcr Itecliary-c Basins near Indian AVC11LIL i'fllSSlll ill the Citj Of Patin Springs, e. A}7pliti ti onl;- to tributaries to the Salftoo Seas, F. [Ills hcn0flclal tlsc if any. to he on Li czlse-hv-Ease brill. X h December 15, 2014 7 Whitewater River Region WQMP Tract Map No. 36744 III. Pollutants of Concern 719,40 Coachella Hydrologic Subunit— Coachella Valley Stormwater Channel (HUB No. 719.40) Table 1. Pollutant of Concern Summary Pollutant Category Potential for Project Specific Pollutants Causing Receiving Water Impairments Per the Clean Water Act Section 303(d) List (Pathogens, Toxaphene. Dielddn, DDT, PCBs SacterWVirus (Pathogens) Yes Yes (Pathogens) Heavy Metals No No Nutrients Yes No Pesticides Yes No • Toxaphene (banned pesticide) No Yes ■ Dieldrin (banned pesticide) No Yes • Dichlorodiphenyltrichloroethane (DDT) (banned pesticide) No Yes Organic Compounds No No • Polychlorinated Biphenyls (PCB) (banned synthetic organic compound) No Yes Sediments Yes No Trash & Debris Yes No Oxygen Demanding Substances Yes No Oil & Grease Yes No The Coachella Valley Stormwater Channel is impaired by pathogens, toxaphene, Dieldrin, DDT (Dichlorodiphenyltrichloroethane) and PCBs (Polychlorinated Biphenyls). The category of pollutants causing receiving water impairments are bacteria/virus (pathogens), organic compounds (PCBs), and pesticides (Dieldrin, DDT and toxaphene). • The new project will not produce toxaphene because the use of this substance (pesticide) has been illegal since 1990; therefore, it will not be used or form part of the proposed development. • The new project will not produce polychlorinated biphenyls (PCBs) because manufacturing this substance (pesticide) stopped in 1977 and its application was banned in 1979; therefore, it will not be used or form part of the proposed development. • The new project will not generate Dieldrin contamination because the use of this substance (pesticide) was related to agricultural operations (found in pesticides for crops) and it has been illegal since 1987; therefore, it will not be used or form part of the proposed development. ■ The new project will not generate DDT contamination because the use of this substance (pesticide) has been banned since 1972; therefore, it will not be used or form part of the proposed development. • The project has the potential to generate small amounts of pathogens. These pollutants are generally associated with various human activities, but pathogens are also present in natural environments. Moreover, pathogens can be associated with wild and domesticated animal waste. Source control measures to address this potential pollutant are discussed in the subsequent sections of this report. December 15, 2014 Whitewater River Region WQMP Tract Map No. 36744 Based on Exhibit 2 (Potential Pollutants Generated by Land Use Type) in the Whitewater River Region Water Quality Management Plan for Urban Runoff (January 2011), the proposed project will consist the following land use type and associated potential pollutants. Type of Oxygen Bacterist Oil Development Sediment/ Organic Trash Demanding & & (Land Ilse) Turbidity Nutrients Compounds & substances Viruses Grease Pestieides Metals Debris Detached P P N P P P P P N Residential Development Abbreviations: P = Potential N = Not potential Notes: (1) A potential pollutant if landscaping or open area exists on the Project site. (2) A potential pollutant if the project includes uncovered parking areas. (3) A potential pollutant if land use involves animal waste. (4) Specifically, petroleum hydrocarbons. (5) Specifically, solvents. (B) Bacterial indicators are routinely detected in pavement runoff. The detached residential development land use type has the generalized potential to produce sedimentitubidity; nutrients; trash & debris, oxygen demanding substances, bacteria & viruses, oil and grease and pesticides. The receiving waters of the project include the Coachella Valley Storm Water Channel. The 2010 Integrated Report (Clean Water Act Section 303(d) List/305(b) Report) identifies an eastern segment of the Coachella Valley Storm Water Channel as being impaired by pathogens, toxaphene, Dieldrin, DDT (Dichlorodiphenyltrichloroethane) and PCBs (Polychlorinated Biphenyls). A General Description of Potential Urban Runoff Pollutants, provided in the following page, presents background information for the categories of potential project pollutants. Legacy Pollutants: Presently there is no evidence that this property contains legacy pollutants, pesticides, nutrients, or hazardous substances in the soils associated with past uses of the property. Pollutants of Concern: Based on the comparison of potential project pollutants with the pollutant categories causing receiving water impairments, the Pollutants of Concern consist of bacteria/virus. December 15, 2014 9 Whitewater River Region WOMP Tract Map No. 36744 General Description of Potential Urban Runoff Pollutants ■ Pathogens — Pathogens (bacteria and viruses) are ubiquitous microorganisms that thrive under certain environmental conditions. Their proliferation is typically caused by the transport of animal or human fecal wastes from the watershed. Water, containing excessive bacteria and viruses can alter the aquatic habitat and create a harmful environment for humans and aquatic life. Also, the decomposition of excess organic waste causes increased growth of undesirable organisms in the water. ■ Metals — The primary source of metal pollution in Urban Runoff is typically commercially available metals and metal products. Metals of concern include cadmium, chromium, copper, lead, mercury, and zinc. Lead and chromium have been used as corrosion inhibitors in primer coatings and cooling tower systems, Metals are also raw material components in non-metal products such as fuels, adhesives, paints, and other coatings. At low concentrations naturally occurring in soil, metals may not be toxic. However, at higher concentrations, certain metals can be toxic to aquatic life. Humans can be impacted from contaminated groundwater resources, and bioaccumulation of metals in fish and shellfish. Environmental concerns, regarding the potential for release of metals to the environment, have already led to restricted metal usage in certain applications. ■ Nutrients — Nutrients are inorganic substances, such as nitrogen and phosphorus. They commonly exist in the form of mineral salts that are either dissolved or suspended in water. Primary sources of nutrients in Urban Runoff are fertilizers and eroded soils. Excessive discharge of nutrients to water bodies and streams can cause excessive aquatic algae and plant growth. Such excessive production, referred to as cultural eutrophication, may lead to excessive decay of organic matter in the water body, loss of oxygen in the water, release of toxins in sediment, and the eventual death of aquatic organisms. ■ Pesticides — Pesticides (including herbicides) are chemical compounds commonly used to control nuisance growth or prevalence of organisms. Excessive or improper application of a pesticide may result in runoff containing toxic levels of its active ingredient. ■ Organic Compounds -- Organic compounds are carbon -based. Commercially available or naturally occurring organic compounds are found in pesticides, solvents, and hydrocarbons. Organic compounds can, at certain concentrations, indirectly or directly constitute a hazard to life or health. When rinsing ori' objects, toxic levels of solvents and cleaning compounds can be discharged to the MS4. Dirt, grease, and grime retained in the cleaning fluid or rinse water may also adsorb levels of organic compounds that are harmful or hazardous to aquatic life. ■ Sediments — Sediments are soils or other surficial materials eroded and then transported or deposited by the action of wind, water, ice, or gravity. Sediments can increase turbidity, clog fish gills, reduce spawning habitat, lower young aquatic organisms survival rates, smother bottom dwelling organisms, and suppress aquatic vegetation growth. ■ Trash and Debris — Trash (such as paper, plastic, polystyrene packing foam, and aluminum materials) and biodegradable organic matter (such as leaves, grass cuttings, and food waste) are general waste products on the landscape. The presence of trash and debris may have a significant impact on the recreational value of a water body and aquatic habitat. Excess organic matter can create a high biochemical oxygen demand in a stream and thereby lower its water quality. In addition, in areas where stagnant water exists, the presence of excess organic matter can promote septic conditions resulting in the growth of undesirable organisms and the release of odorous and hazardous compounds such as hydrogen sulfide. ■ Oxygen -Demanding Substances — This category includes biodegradable organic material as well as chemicals that react with dissolved oxygen in water to form other compounds. Proteins, carbohydrates, and fats are examples of biodegradable organic compounds. Compounds such as ammonia and hydrogen sulfide are examples of oxygen -demanding compounds. The oxygen demand of a substance can lead to depletion of dissolved oxygen in a water body and possibly the development of septic conditions. ■ Oil and Grease - oil and grease are characterized as high -molecular weight organic compounds. Primary sources of oil and grease are petroleum hydrocarbon products, motor products from leaking vehicles, esters, oils, fats, waxes, and high molecular -weight fatty acids. Introduction of these pollutants to the water bodies are very possible due to the wide uses and applications of some of these products in municipal, residential, commercial, industrial, and construction areas. Elevated oil and grease content can decrease the aesthetic value of the water Lbody, as well as the water quality December 15, 2414 10 r Whitewater River Region WOMP Tract Map No. 36744 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, Permittees Requiring Onsite Retention of Stormwater, of the Whitewater River Region WQMP). This section does not need to be completed. No ❑ This section must be completed. In consideration of the storm drain and retention facilities, which are sized to store the runoff from the 100 -year design storm, the project will not result in changes to the hydrologic regime that will permanently impact downstream channels and habitat integrity. No Hydrologic Conditions of Concern are associated with the remaining development of the project. This Project meets the following condition: Condition A. Runoff from the Project is discharged directly to a publicly -owned, operated and maintained MS4; the discharge is in full compliance with Permittee requirements for connections and discharges to the MS4 (including both quality and quantity requirements); the discharge would not significantly impact stream habitat in proximate Receiving Waters; and the discharge is authorized by the Permittee. Condition B: The project disturbs less than 1 acre and is not part of a larger common plan of development that exceeds 1 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 minimizing impervious area on a site and incorporating other site -design concepts that mimic pre -development conditions. This condition must be substantiated by hydrologic modeling methods acceptable to the Permittee. N one Refer to Section 3.4 of the Whitewater River Region WQMP for additional requirements. December 15, 2014 11 Whitewater River Region WQMP Tract Map No. 36744 Table b - Permittees Requiring Onsite Retention of Stormwater Acquired from Appendix H of the Whitewater River Region Water Quality Management Plan Permittee Ordinance Requirement Cathedral City Municipal Code — Title 8 § A. Except as noted below, development of all land within the city must include 8.24.070 provisions for the management of stormwater runoff from the property which is to be developed. This management shall consist of constructing stormwater storage facilities, which includes detention basins. As a minimum, all development will make provisions to store runoff from rainfall events up to and including the one -hundred - year, three-hour duration event. If a suitable outlet for a detention basin is not available, or if engineering analysis indicates that available outlet systems would be overtaxed by detention basin outflow, a retention basin shall be constructed in lieu of a detention basin. B. The requirement for construction of a detention basin or a retention basin may be waived in the following cases_ 1. The runoff has been included in a storage facility at another location. This may include storage facilities proposed as part of the Cathedral City Storm Drain Master Plan; 2. An application for a building permit to construct a single-family residential structure; 3. Development which will drain directly into a floodway or watercourse drainage channel which has been determined by the project review manager, using engineering analyses provided by the development, to have the capacity and be constructed to handle the additional runoff flow without increasing the potential for flood damage on any other downstream property. 4. Development of a parcel under one-half acre in an area where it can be demonstrated by engineering analyses that no significant increase in the potential for flood damage will be created by the development. Indio Cade of Ordinances —Title Properties of one acre or greater in size shall be designed to retain the 100 -year, 24 - XV Land Usage, §162,140 hour, duration storm on site. Such properties shall retain this duration storm on site or provide a drainage system to convey the drainage to an acceptable retention site as determined by the Director of Public Works. Such a drainage system shall include a provision to fully address disposal of nuisance water to the satisfaction of the Director of Public Works. La Quinta Municipal Code — Tide D. Stormwater runoff produced over the peak twenty -four - 13 §13.24.120 hour period of a one-hundred—year storm shall be mtarined on 91W unless waived by the city engineer. Engineering Bulletin 906-16 sets Hydrology and Hydraulic Report Criteria for Storm Drainage System. Palm Desert Municipal Code - Title 26 § Developments of ten gross acres or more shall provide sufficient on-site stormwater 26.49.060 retention andior retardation so as to limit peak runoff during a storm having twenty- five -year intensity to a rate no greater than that which would have otherwise occurred under undeveloped conditions. Palm Springs Municipal Cade 9.80.030 (18) (18)The subdivider shall install storm sewer conduits, structures, and appurtenances & (19)(A) when required, in accordance with the master plan of flood control and drainage or by city council direction. (11 9)(A) The design of lots shall be in accordance with the zoning ordinance, adopted general plans, specific plans and with city policy. Rancho Mirage Municipal Code — Title 15 Properties of one acre or greater in size located northerly of the Whitewater River §15.64.140 Channel shall be designed to retain the ane -hundred -year, twenty -four-hour, duration storm on site. Other properties shall retain this duration storm on site or provide a drainage system to convey the drainage to an acceptable disposal site as determined by the city engineer. December 15, 2014 12 f Whitewater River Region WQMP Tract Map 367" 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. These BMPs have been selected and implemented to comply with the Section 3.5 of the WQMP and consist of Site Design, Source Control and, if/where necessary, Treatment Control BMPs as described herein. V.1 SITE DESIGN AND TREATMENT CONTROL SMPS 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, Permittees Requiring Onsite Retention of Stormwater, of the Whitewater River Region WQMP). Section VA does not need to be completed. No ❑ Section V.1 must be completed. This section of the Project -Specific WQMP documents the Site Design BMPs and, if/where necessary the Treatment Control BMPs that will be implemented on the Project to meet the requirements within Section 3.5.1 of the WQMP. Section 3.5.1, includes requirements to implement Site Design Concepts and BMPs, and includes requirements to address the project's Pollutants of Concern with BMPs. Further sub -section 3.5.1.1 specifically requires that the projects Pollutants of Concern be addressed with Site Design BMPs to the extent feasible. This project incorporates Site Design BMPs to fully address the Pollutants of Concern where and to the extent feasible. If and where it has been acceptably demonstrated to the Permittee that it is infeasible to fully meet this requirement with Site Design BMPs, this section 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. December 15, 2014 13 Whitewater River Region WQMP Tract Map 36744 Table 2. BMP Selection Matrix Based Upon Pollutant Removal Efficiency ill (Excerpted, with minor revision, from the Orange County Water Qualilyr Management Plan dated September 26. 2DO3 and the San Bernardino Water quality Management Plan dated April 14, 2DD4) Note: Completion of this table is not required since the project retains urban runoff on-site with the existing storm drain and retention facilities in conformance with the local ordinances. December 15, 2014 14 Wet Water Hydrodynamic Manufactured Detention Infiltration Ponds Filtration Quality Separator or Proprietary Pollutant of Biofilters Basins (3) BMPs (4) or Systems Inlets Systems (7) Devices (5) Concern (Z( Wetland A 5 (5) Sediment/Turbidity HIM M HIM HIM HIM L HIM U (L for Turbidity) Nutrients L M HIM HIM UM L L U Organic U U U U HIM L L U Compounds Trash & Debris L M U U HIM M HIM U Oxygen L M HIM HIM HIM L L U Demanding Substances Bacteria & Viruses U U HIM U HIM L L U Oil & Grease HIM M U U HIM M LIM U Pesticides U U U U U L L U (non -soil bound) Metals HIM M H H H L L U Abbreviations: L: Low removal efficiency H1M: High or medium removal efficiency U: Unknown removal efficiency Notes: (1) Periodic performance assessment and updating of the guidance provided by this table may be necessary. (2) Includes grass swales, grass strips, wetland vegetation swales, and bioretention, (3) Includes extended/dry detention basins with grass lining and extended/dry detention basins with impervious lining. Effectiveness based upon minimum 36 -48-hour drawdown time. (4) Includes infiltration basins, infiltration trenches, and porous pavements. (5) Includes permanent pool wet ponds and constructed wetlands. (6) Includes sand filters and media filters. (7) Also known as hydrodynamic devices, baffle boxes, swirl concentrators, or cyclone separators. (8) Includes proprietary stormwater treatment devices as listed in the CASQA Stofmwater Best Management Practices Handbooks, other stormwater treatment BMPs not specifically listed in the WQMP, or newly developed/emerging stormwater treatment technologies. Note: Completion of this table is not required since the project retains urban runoff on-site with the existing storm drain and retention facilities in conformance with the local ordinances. December 15, 2014 14 Whitewater River Region WOMP Tract Map 36744 V.1.A SITE DESIGN BMPS Note: Completion of this sub -section is not required since the project retains urban runoff on-site in conformance with the local ordinances. December 15, 2014 15 ,0�kl Whitewater River Region WQMP Tract Map No. 36744 Table 3. Implementation of Site Design Concepts Note: Completion of this sub -section is not required since the project retains urban runoff on-site in conformance with the local ordinances. December 15, 2014 16 Included Brief Reason for BMPs Design Concept Technique Specific BMP Yes Na NIA Indicated as No or NIA Conserve natural areas by concentrating or duster development on the lease environmentally sensitive portions ❑ 1:1 El 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 1:1 1:1 [E]storage areas on the site. Maximize canopy interception and water conservation by preserving existing native trees and shrubs, and planting [] ❑ ❑ m Minimize Urban additional native or drought tale rant trees and large shrubs. ss Runoff, Minimize Impervious Use natural drainage systems. 9❑ ❑ ❑ U Footprint, and Z Conserve Natural Increase the building floor area ratio (i.e., number of stories 1:1 El El.� Areas above or below ground). q {sae WQMR Construct streets, sidewalks and parking lot aisles to that safety and a ❑ ❑ ❑ Section 3.5.1.3) minimum widths necessary, provided public r , walkable environment for pedestrians is not compromised. N Reduce widths of streets where off-street parking is ❑ ❑ ❑ available. Design driveways with shared access, flared (single lane at 1:1 Li El street), or wheel strips {paving only under the tires}. Minimize the use of impervious surfaces, such as decorative ❑ 1:1 EJconcrete, in the landscape design. other comparable and equally effective Site Design BMP (or BMPs) as approved by the Permittee (Note: Additional ❑ ❑ ❑ narrative required to describe BMP and how it addresses site design concept). December 15, 2014 16 Whitewater River Region WQMP Tract Map No. 36744 Table 3. Site Design BMPs (continued) Note: Completion of this sub -section is not required since the project retains urban runoff on-site in conformance with the local ordinances. Included Design Technique Specific BMP Yes No NIA Concept Residential and commercial sites must be designed to contain and infiltrate roof runoff, or direct roof runoff to vegetative swales or buffer ❑ ❑ ❑ areas. Drain impervious sidewalks, walkways, trails, and patios into adjacent ❑ ❑ ❑ landscaoinp. Brief Reason for Each BMP Indicated as No or NIA December 15, 2014 17 Incorporate landscaped buffer areas between sidewalks and streets. U U I U Uncovered temporary or guest parking on residential lots paved with a ❑ ❑ ❑ permeable surface, or designed to drain into landscaping- andsca in .Rural Ruralswaie system: street sheet flows to vegetated swale or gravel shoulder, curbs used at street corners, and culverts used under ❑ ❑ ❑ ey driveways and street crossings. Urban curb/swale system: street slopes to curb,, periodic swale inlets ❑ ❑ ❑ y Minimize drain to vegetated swale or biofilter. Dual drainage system: first flush captured in street catch basins and ❑ ❑ ❑ C Directly Connected Impervious discharged to a proposed underground retentions stem. Area Maximize the permeable area by constructing walkways, trails, patios, S overflow parking, alleys, driveways, low -traffic streets, and other low - (Sea WQMp traffic areas with open -jointed paving materials or permeable surfaces ❑ ❑ ❑ Section 3.5.1.4) such as pervious concrete, porous asphalt, unit pavers, and granular w materials. 'A H Use vegetated drainage swales in lieu of underground piping or ❑ ❑ ❑ imperviously lined swales. Incorporate parking area landscaping into the drainage design. Where soil conditions are suitable, use perforated pipe or gravel ❑ ❑ ❑ filtration pits for low flow infiltration. Construct onsite infiltration BM Ps such as dry wells, infiltration trenches, and infiltration basins consistent with vector control ❑ ❑ ❑ objectives. Construct onsite ponding areas or detention facilities to increase opportunities for infiltration consistent with vector control objectives. ❑ ❑ ❑ Brief Reason for Each BMP Indicated as No or NIA December 15, 2014 17 Design I Technique Concept Specific BMP Whitewater River Region WQMP Tract Map No. 36744 IncludedI Brief Reason for Each BMP Indicated as No or NIA Yes I No I NIA w Direct roof runoff into cisterns or rain barrels for reuse. ❑ 4 Minimize v Directly c (� Connected Impervious G Area `- (See WQMP Q Section 3.5.1.4) Use vegetated drainage swales in lieu of underground piping or ❑ w imperviously lined swales, Incorporate tree well lifters, flow-through planters, and/or bioretention areas into landscaping and drainage plans. Other comparable and equally effective Site Design BMP (or BMPs) as approved by the Permittee (Note: Additional narrative required ❑ describing BMP and how it addresses site design concept]. [to 01 LEA Mm u■LEA *In December 15, 2014 is Whitewater River Region WQMP Tract Map No. 36744 Project Site Design BMPs. Not applicable. December 15, 2014 19 QQ Whitewater River Region WQMP Tract Map No. 36744 Table 4. Site Design BMPS Meeting the Measureable Gaal in WOMP Section 3.5.1.1 Note: Completion of this .rub -section is not required since the project retains urban runoff on-site in conformance with the local ordinances. (1) DRAINAGE SUBAREA ID OR NO. 121 SITE DESIGN BMP TYPE * (See Table 2) 131 POLLUTANTS WITHIN SUBAREA CAUSING RECEIVING WATER IMPAIRMENTS (refer to Table 1) (4) RELATIVE EFFECTIVENESS OF BMP (COLUMN 2) AT ADDRESSING IDENTIFIED POLLUTANTS (COLUMN 3) A L. K HUM, H; see Table 2) (5) BMP MEETS WHICH DESIGN CRITERIA? (identify as VRw OR QBw) (a) BMP TRIBUTARY AREA (nearest 0.1 arae) TOTAL AREA TREATED WITH SITE DESIGN BMPS NEAREST 0.1 ACRE)" * Site Design BMPS included in this table are those that completely address the Treatment Requirements for their tributary area. December 15, 2014 20 Whitewater River Region WQMP Tract Map No. 36744 Justification of infeasibility for sub -areas not addressed with effective Site Design BMFs in Table 4: US 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.1.A has demonstrated that it is infeasible to meet these requirements through implementation of Site Design BMPs. ® The Site Design BMPs described in Section V. LA of this project -specific WQMP completely address the Pollutants of Concern for the entire project site as required in Section 3.5.1.1 of the WQMP. Supporting documentation for the sizing of these Site Design BMPS is included in Appendix F. *Section V.1.13 need not be completed. ❑ The Site Design BMPS described in Section V.1.A of this project -specific WQMP do NOT completely address the Pollutants of Concern for the entire project site as required in Section 3.5.1.1 of the WQMP. *Section V. 1.13 must be completed. Note: The drywell system functions as both a water quality inlet and a filtration system in reference to Table 2 (BMP Selection Matrix on page 14). The Water Quality Inlet function of the proposed system includes the trapping catch basin (settling chamber) to promote sedimentation of coarse materials. The media filters located at the down -drain is characteristic of Filtration System. As a result, pollutant removal efficiency the proposed drywell system is deemed equal to both a Water Quality Inlet and a Filtration System in Table 2 of this report. As a result, the collective pollutant removal efficiency of the proposed BMP facilities is equal to the combined use of a Filtration System, Water Quality Inlets, and Hydrodynamic Separators, December 1S, 2014 21 r Table 5: Treatment Control BMP Summary Whitewater River Region WQMP Tract Map No. 36744 Note: Completion of this sub -section is not required since the project retains urban runoff on-site in conformance with the local ordinances. (1) DRAINAGE SUBAREA ID OR NO. (2) SITE DESIGN BMP TYPE * (See Table 2) (3) POLLUTANTS WITHIN SUBAREA CAUSING RECEIVING WATER IMPAIRMENTS (refer to Table 1) (4) RELATIVE EFFECTIVENESS OF BMR (COLUMN 2) AT ADDRESSING IDENTIFIED POLLUTANTS (COLUMN 3) (U, L. M, HIM, H; see Table 2) (5) BMP MEETS WHICH DESIGN CRITERIA? (identify as Venw OR QBmp) (B) BMP TRIBUTARY AREA (nearest 0,1 acre) TOTAL AREA TREATED WITH SITE DESIGN BMPS NEAREST 0.1 ACRE)", * Site Design BMPS included in this table are those that complete_lx address the Treatment Requirements for their tributary area. December 15, 2014 22 Whitewater River Region WOMP Tract Map No. 35744 11.1.0 MEASUREABLE GOAL SUMMARY This section documents the extent to which this project meets the measureable goal described in WQMP Section 3.5.1.1 of addressing all of the projects Treatment Requirements with Site Design BMPs. 'rable 8_ Measureahle Goan* Summary (1) (2) (3) % of Treatment Total Area Treated with Total Area Treated with Requirement addressed Site Desion BMPs Treatment Control BMPs with Site Design BRAPs NIA N/A NIA Instructions: Column (1) Enter the sum of the BMP Tributary Areas from Table 4 Column (2) Enter the sum of the BMP Tributary Areas from Table 5 Column (3) Calculate the % of the Treatment Requirement that was addressed with Site Design BMP's. (3) = (1) * 100 1(1)+(2) December 15, 2014 23 Whitewater River Region WOMP Tract Map No. 36744 V.2 SOURCE CONTROL BMPs This section identifies and describes the Source Control BMPs applicable and implemented on this project. Table 7. Source Control BMPs BMP Name Check One If not applicable, state brief reason Included A livable ot � s =2 �= >s.� '�. '�: ��' _- _•=`�,_ �. _ � L`- .�-'_` _ e'er "'r "'si',-': - 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 Facili Ins ction and Maintenance ® ❑ M S4 Stenciling and Signage ® ❑ Proposed stenciling at existing inlet locations. Landscape and Irrigation System Design ❑ [SC -35 and SC -41 BMPs] Protect Slopes and Channels ❑ ® The project does not have slopes or similar features to be protected. Provide Community Car Wash Racks ❑ ® Not part of the proposed project uses Properly Design*: Fueling Areas ❑ ® Not part of the proposed or existing improvements AirMlater Supply Area Drainage ❑ ® Not part the proposed or exiski improvements Trash Storage Areas ❑ ® Not part of the proposed or existing im rovements Loading Docks ❑ ® Not part of the proposed or I existing improvements Maintenance Bays ❑ ® Not part of the proposed or existing improvements Vehicle and Equipment Wash Areas E]® Not part the proposed or existingimprovements Outdoor Material Storage Areas ❑ ® Not part of the proposed or existing improvements Outdoor Work Areas or Processing Areas 1:1® Not part of the proposed or existing improvements Provide Wash Water Controls for Food Preparation Areas El ® Not part of the proposed or existing improvements *Details demonstrating proper design must be included in Appendix F. December 15, 2014 24 l Whitewater River Region WQMP Tract Map No. 38744 Non -Structural Source Control BMPs Education Program: Residents and maintenance staff should be informed on topics related to stormwater pollution and prevention through various means, which can include the distribution of printed materials or public posting of rules or activity restrictions. A series of guidelines should be formulated and promoted to communicate beneficial habits and restricting harmful activities. Appendix D includes samples of the educational materials that can be used in implementing this project - specific WQMP. Activity Restrictions: Littering shall be prohibited. All discharge and waste dumping shall be prohibited. Furthermore, blowing, sweeping or hosing debris into the parking areas will not be permitted. Irrigation System and Landscape Maintenance: Operation and Maintenance responsibilities and scheduling will be adhered to throughout the life of the project. Issues such as broken irrigation equipment shall be repaired immediately. Continued irrigation and landscape maintenance will increase the effectively of these systems. Runoff and any associated effects, including erosion and pesticidelfertilizer conveyance, will be minimized through the employment of proper maintenance. Common Area Litter Control Landscaping maintenance staff and residents shall be instructed to follow proposed schedule of common area maintenance. Littering will be prohibited throughout the development. Street Sweeping of Private Streets and Parking Lots Landscaping maintenance staff shall be instructed to sweep streets or conduct the specific measures called out in the maintenance schedule. Drainage Facility Inspection and Maintenance Maintenance staff will immediately repair malfunctioning facilities. Inspection and Maintenance of facilities will maintain the effectiveness of the BMP's. Safer Alternative Products (CASQA SC -35) The use of less harmful products as alternatives to chemical fertilizers, pesticides, cleaning solutions, janitorial chemicals, and consumables will be pursued under the guidance of SC -35. The objective of this Source Control BMP will be to integrate the measures as much as possible with the future programs at this facility. Building and Grounds Maintenance (CASQA SC -41) A series of maintenance practices can be implemented to prevent or reduce the discharge of potential pollutants into the stone drain system resulting from building and grounds maintenance activities. The BMP implementation will be achieved with the following guidelines under SC -41: 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 properly maintaining the stormwater collection system. December 15, 2014 25 l Whitewater River Region WQMP Tract Map No. 36744 Structural Source Control BMPs MS4 Stenciling and Signage Storm drain signage will be placed in appropriate locations to prohibit discharge and waste dumping into storm water inlets and storm channels in the project area. The signage may include a written expression that explicitly prohibits the discharge or dumping. Landscape and Irrigation System Design The site's structural source control BMP involves an efficient landscape irrigation design, which will be consistent with the City of La Quinta Irrigation Water Efficient and Irrigation System Design (Chapter 8.13). The drought tolerant landscaping, in combination with the proposed water -efficient irrigation, will minimize the potential for runoff of excess irrigation water (nuisance water) into the stormwater conveyance system. It will also work to reduce soil amendments and irrigation frequency. Furthermore, the system will minimize the conveyance of landscape related chemicals, including fertilizers and pesticides. V.3 BQuIVALENT TREATMENT CONTROL ALTERNATIVES Not applicable 11.4 REGIONALLY -BASED TREATMENT CONTROL BMPS Not applicable December 15, 2014 26 f Whitewater River Region WOMP Tract Map No. 36744 VI. Operation and Maintenance Responsibility for BMFs 11-71..1lK*W1,,19 111". ,d[e]MI:n. 01]u•F.11QBIIAzn. &W al BMP Requiring Party Inspection Implementation Maintenance Maintenance Maintenance Responsibility Frequency Period Frequency Requirements As necessary based on observations made Landscaped Areas Twice monthly Post -Construction during inspection or (See following per approved page) landscaping maintenance plan As necessary based on observations made {See following Irrigation Systems Twice monthly Post -Construction during inspection or page} per approved irrigation Current Owner or Future HOA plains Storm Drain Quarterly and As necessary based on {see following System After storm eventsdurin pow Construction observations made page} inspection Once yearly or after Once yearly or after significant storm (See following Drywell System significant storm Past -Construction events that may have page) events resulted in high loading of hash and debris As neoessary based on According to the observations made According to the Private Lake lake system Post -Construction during inspection or lake system System engineer's according to the lake engineer's specifications system engineer's specifications specifications December 15, 2014 27 Whitewater River Region WOMP Tract Map No. 36744 Description of Maintenance Requirements: Landscaped Areas: All trimming, pruning, and removal of fallen organic material from plants, shrubs, and trees is to be collected twice monthly, stored in an appropriate location and transported to an approved green -waste collection facility approved by the City of La Quinta and the County of Riverside. The planting materials are to remain as indicated on the approved set of landscape planting plans. These approved plant species require very limited to no use of fertilizer, herbicide and pesticide. Irrigation Systems: Water conservation is to be maintained at all times per approved irrigation plans. Monitoring of the irrigation system is to be provided twice monthly to ensure that appropriate watering levels are maintained as well as to verify that no piping or irrigation heads are leaking. Debris/sediment/mineral deposits are to be removed from the irrigation system at regular intervals to provide consistent watering levels. Storm Drain: Inlets, outlets, manholes, and pipelines are to be inspected quarterly and after each storm event. All parts of the system are to be periodically cleaned to ensure that the system works properly during any storm event. Drywell System: Maintenance frequency and operations shall be conducted according to the manufacturer's specifications. Drywell manufacturers may offer specific inspection and maintenance services on the installed devices. 1. Drywell system cleaning is typically accomplished as follows: — Use a truck -mounted hydro-vactor (or similar) equipment to dislodge and remove debris and sediment deposits in the settling chambers. — Clean all chambers, inlets, connecting piping and catch basins. The contents are to be transported to an approved off-site for disposal. — Remove and replace any geotextile fabric base seals and media filter in each chamber as necessary. — Securely re -install the inlet grates and covers — Remove any debris and trash from under the collector grate inlets. 2. The recommended maintenance periods are as follows: — Annually — Following heavy rainfalls and high loading of the system with foreign trash and debris — Should a spill or other discharge occur, complete service of the systems may be necessary. 3. Refer to additional inspection and maintenance service recommendations from the drywell manufacturer. Private Lake System: All maintenance of the lake, including the filtration/aeration system, must adhere to the lake system engineer's specifications. December 15, 2014 28 Whitewater River Region WQMP Tract Map No. 36744 VII. Funding The funding source for operation and maintenance of each BMF identified in the Project Specific Final Water Quality Management Plan shall be the responsibility of the current project owner, or future Home Owner's Association. The owner recognizes that a source of funding is required to support the on-going operation and maintenance of BMPs, and that funding will continue for the life of the project. By certifying the final project specific WQMP, the Project applicant is certifying that the funding responsibilities have been addressed and will be transferred to future owners, including the Home Owner's Association. One example of how to adhere to the requirement to transfer operation and maintenance responsibilities is to record the project specific WQMP against the title to the property. December 15, 2014 29 Whitewater River Region WOMP Tract Map No. 367" Appendix A Conditions of Approwa (To be provided) Planning Commission Resolution Dated 3 Whitewater River Region WQMP Tract Map No. 35744 Appendix B Vicinity Map, WQMP Site Plan, and Receiving Waters Map AVENU a� 4 LU 2 COTY OF ONDOO N.T.S. MSA CONSULTING, INC Vicinity Map PLAMM a ■ C vm m � Smvnm 342 Sm Ham Dam . RAN= Mum . ca 92xM (7W 3204u . F,x (M M7W The Estates at Griffin Lake AVENUE 52 Lu Lu I Lu � 4n Lu z 11111 z V) u 0 AVENUE 5d SITE I LA �l4DOR14G] 17 I 0� is 4�GlOPJ�®f ly®Ra4CE® COUNTY I OF ROWERSME — — AIRPORT BOULEVARD Lu Lu Lu z 22 2112 J AVENUE 58 29 I 1 28 27 LJ — — — — L — N.T.S. MSA CONSULTING, INC Vicinity Map PLAMM a ■ C vm m � Smvnm 342 Sm Ham Dam . RAN= Mum . ca 92xM (7W 3204u . F,x (M M7W The Estates at Griffin Lake T IWAV 5 Adjan FUdge Shadow Kiih GAff UVb t. c4ub 404 At Terra' L WHITEWATER RIVER w srado --- ------- Wi j J, 'IUD 1�vwL vcy purOy It ae % ranta COLF*N Club opz� 7 F md And Dar Z2 AL. N Twdaowy madi G411 Chlb PROJECT SITEcroo, ciu&ttor' I AugLah"s I (IcAan or :E Thftntj Pgo W19 Z FP-Irt gild Gof Fx 1 pac4nivdine VSoy rhran o focbtusia quinia Z Club Golf OU4 At 40 Q"W2 y 40 4F14 /e -I r I V" o ro A"' TAT -n, Mciwlincz Inchon R,!,ervaicm wg� COACHELLA VALLEY STORMWATER CHANNEL Indian 141 ecce ♦ f SALTONSEA 7 MSA CoNsuiLTmc.. INc MAP OF RECEIVING WATERS PL&wmm m Ckm Rommmmum m Lmm &mvzYm i 3M &* Hasa Delve v RmKm Mum m C& =70 ID rxxmoa Chgo 3204M m FAx CM% 323-7M ORI' , 1 L� } ` I 4 I } l DONALI STREFf I l r �d 14C�A�4 l � aP LG�l(�1D UR Es LOY�xmv1 f -� z I CER I>�Iad MOMMa. LOV 1 , DC IAI T1 GCE QDEHTOG^aL %VOT' dl Irl 1 Gp me -mom OWEA za V 4 a, I I � rI� } 1 787-Z20-008 f , I /Z 1� I 707-3 m m N � EXISTING SPOT ELEVATIONS / E X. 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N 89'49'25,80" E 1316.79'_---�SEALTTLE SLE - �_ -- - � -------------- 1 �µ �� ft /� � � p f� p /,��y�TI G3G^Q(�[��4�r+I��/®o�7 ��a�712� '�/ p /�p/y� � O- P Ll 4D L+ 1ER LLL WY DIERSO 1I if R 80DIE 7QnL �` ONOWIG8 ISNJl'h7 p � f1 «NJ CSLfJ�u�(g] ABBREVIATIONS LEGEND (E) EAST 679.3 EXISTING SPOT ELEVATIONS (N) NORTH = _ = - ~ f EXISTING CONTOURS (S) SOUTH RUNOFF COEFFICIENT: (W) WEST UNIT STORAGE VOLUME: EXISTING CITY/COUNTY BOUNDARY A.C. ASPHALT CONCRETE - - EXISTING EASEMENT AC ACREAGE APN ASSESSORS PARCEL NUMBER �r �� TENTATIVE TRACT MAP BOUNDARY BNDRY BOUNDARY -- - PROPOSED AND EXISTING CENTER LINE CIL CENTERLINE MB 90 C&G CURB AND GUTTER PROPOSED CURB E)p EDGE OF PAVEMENT - -- PROPOSED EASEMENT ESMT. EASEMENT PROPOSED FENCE LINE EX. EXISTING . - MAX. MAXIMUM ru PROPOSED PARCEL LINE M.B. MAP BOOK PROPOSED RIGHT OF WAY MIN. MINIMUM NO. NUMBER PROPOSED STORM DRAIN LINE N.T.S. NOT TO SCALE »»>a ri ri r M PROPOSED RETAINING WALL OIH OS/PP OVERHEAD OPEN SPACP 1 PARKS ❑ PROPOSED CATCH BASIN PG. PAGE O PROPOSED DRYWELL P PROPERTY LINE PROP. PROPOSED PROPOSED SURFACE DRAINAGE DIRECTION P.U.E. PUBLIC UTILITY EASEMENT I R RADIUS IND#GATES IMPERVIOUS AREA R -L LOW DENSITY (RESIDENTIAL] RIW RIGHT OF WAY INDICATES PERVIOUS AREA (Lois) SF SQUARE FEET 9110. STANDARD . �.". `_ ' . INDICATES PERVIOUS AREA {OPEN SPACE] TYP. TYPICAL UG UNDERGROUND DOOM OF INDICATES PERVIOUS AREA (LAKE) TRIBUTARY AREA BOUNDARY v A DRAINAGE AREA ID I LA QUONI 1.38 AC. AREA (AC) is PROPOSED GARDEN WALL PIL I- 7' BUILDING 3" COBBLE I- -i a I DRAINAGE CHANNEL V=4' NOTE: 7.5' WIDE STRIP OF UNGROUTED RIPRAP TO BE PLACED BETWEEN THE END OF THE DRAINAGE CHANNEL AND THE EDGE OF THE LAKE. 11 IN THE CITY OF LA QUINTA, COUNTY OF RIVERSIDE, STATE OF CALIFORNIA PRELIMINARY WATER QUALITY MANAGEMENT PLAN for Tentative Tract Map No. 36744 PROJECT NAME: THE ESTATES AT GRIFFIN LAKE EXHIBIT DATE: DECEMBER 5, 2014 BEST MANAGEMENT PRACTICES BMP NUMBER ON PLAN BMF DESCRIPTION BMP 1 STORMWATER RETENTION IN LAKE SYSTEM BMP 2 DRAINAGE CHANNEL BMP 3 DRYWELL DRAINAGE SYSTEM BMP DESIGN VOLUME - DRAINAGE AREA B TRIBUTARY AREA TO BMP: 38.41 AC IMPERVIOUS AREA WITHIN TRIBUTARY: 121.93 AC IMPERVIOUS j TRIBUTARY AREA: 577. RUNOFF COEFFICIENT: 0.39 AC UNIT STORAGE VOLUME: 0.1 g AL; -IN VBMP CONVERSIONS: 5.95 AC -IN 0.50 AC -FT C OTT OF 21,602 CU -FT Q LOWER LAKE RETENTION VOLUME: 1151,923 CU -FT U C I z (Lu C OTT OF Q MB 90 AVENUE 52 . - ru m Lu oc F o a I01 w a Q I I AVENUE 54 DOOM OF v I LA QUONI U6'11iRmc©mpamiL1° CSD CN coo UNTly OF [RRVIERSOD _ AIRPORT BOULEVARD Lu 0 C��J1Q�gp� 0' 100' 200' 300' 400' -z AVENUE 58 co f 4FIlI SCALE 1 "=100' 2 ell 'iVQ VICINITY MAP MSA CONSULTING, INC. DESIGN SHEET a �.� PLANNING ■ CIVIL ENGINEERING a LAND SURVEYING DRAWN BY O o DJG O Q 34204 BOB HOPEDRTVE ■ RANCHO MIRAGE ■ CA 92274 '� TELEPHONE (760) 320-9811 ■ FAx (760) 323-7893 CHECK BY ID MDR SHEETS N J Whitewater River Region WQMP Tract Map No, 36744 Appendix C Supporting Detail Related to Hydraulic Conditions of Concern Note: The project will not result in hydraulic conditions of concern. Whitewater River Region WQMP Tract Map No. 367" Appendix D Educational Materials 3 1-4 f el"N Nelp%l telishone numbers snd links: WATER AGENCY LIST in Riverside County City of Planning (951) 922-3136 Co of Beaumont (951) 769-8526 City of Blythe 1760) 922-6161 City of Coachella (760) 398.3507 Coachella Valley water District (760) 398-2651 City of Corona (951) 736.2259 Desert Center. CSA o51 (760) 227.3203 Eastern Municipal Water District (951) 928.3777 Elsinore Valley MWD (951) 674-3146 Farm Mutual Water Company (951) 244-4198 City or Hemet (951) 765.3712 Idyllwild Water District (951) 659-2143 ]urupa Cnrnmunity Services District (951) 366-6795 Lake Hemet MWD (951) 658-3241 Lee Lake Water District (951) 277-1414 March Air Force Base (951) 656.7000 Mission Spnngs Water District (760) 329-6448 City of Palm Springs (760) 323-8253 Rancho Caballero (951) 780.9272 Rancho California Water DiStriit {951) 296.6900 Ripley, CSA a51 (760) 922.4951 City of Rverside (951) 351-6170 Ruhidoux SerVICYS District (951) 684-7580 Silent Vailey Club, Inc (9511 6494501 Valley Sanitary District (750) 347-2356 Western Municipal Water District (951) 789-5000 Yucaipa Valley VAlter District {949) 797.5117 REPORT ILLEGAL STORM DRAIN DISPOSAL 1-801]-506-2555 or online at www, rcflood.org Online resources include: • Riverside County Flood Control and Water Conservation district www, rcfl ond.omt • California Storm Water Quality Association www.casqa.org • State Water Resources COntrQl Board www.swrcb.ra.gov/ • Power Washers of North America lommater P011UH00i %at you *0UM Imm for— OUTDOOR CLEANING ACTIVITIES AND PROFESSIONAL MOBILE SERVICE PROVIDERS Stem drain aoltutloo.areventilan information for: Car Washing 1 Mobile Detaiiers Window and Carpet Cleaners Power Washers Waterproofers 1 Street Sweepers, Equipment cleaners or degreasers and all mobile service providers Do you know where street flaws actually coo? Sturm Brains are NOT connected to sanitary sewer systems and treatment plants! ONLY RAIN flAk1;l4 The primary purpose of storm drains Is to carry rain water awav From developed areas to prevent flooding. .•-, ;,-,,.,- :;,,4 Pollutants discharged to storm drains are transported directly into rivers, lakes and streams. Soaps, degreasers, automotive fluids, litter and a host of materials are washed off buildings, sidewalks, plazas and parking areas. Vehicles and equipment must be properly managed to prevent the pollution of local waterways. pi�l Unintentional spills by mobile service operators can flow into storm drains and pollute our waterways. Avoid mishaps. Always have a Spill Response Kit on hand to clean up unintentional spills. Only emergency Mechanical repairs should be done in City streets and use drip pans for spills. Plumbing should be done on private property. Always store chemicals in a leak -proof container and keep covered when not in use. WindowlPower Washing waste water shouldn't be released into the streets, but should be disposed of in a sanitary sewer, landscaped area or in the sail. Soiled Carnet Ctcanina wash water should be filtered before being discharged Into the sanitary sewer. dispose of all filter debris properly. Car Washin9jjrjAI ng operators should wash cars on private property and use a regulated hose nozzle for water flow control and runoff prevention. Capture and dispose of waste water and chemicals j properly. Always prevent runoff water from entering storm drains. ,, i . 1, REPORT ILLEGAL - STORM BRAIN DISPOSAL q 1-800-506-2555 Help Protect Our Waterways! Use These Guidelines For Outdoor Cleaning Activities and Wash Water Disposal Did you know that disposing of pollutants into the street, gutter, storm drain or nearest body of water is PROHIBITED by law and can bang about stiff penalties. Best Management Practices Waste wash water from Mechanics, Plumbers, Window/Power Washers, Carpet Cleaners, Car Washing and Mobile Detailing activities may contain significant quantities of motor oil, grease, chemicais, dirt, detergents, brake pad dust, litter and other materials. Best Management Practices, or BMps as they are known, are guides to prevent pollutants from entering the storm drains. Each of us can do our part to keep storm water clean by using the suggested BMPs below; Simple solutions for both light and heavy duty jobs; Do ... consider dry cleaning methods first such as a mop, broom, rag or wire brush. Always keep a spill response kitonsite. Do ... prepare the work area before power cleaning by using sand bags, rubber mats, vacuum booms, containment pads or temporary berms to keep wash water away from the gutters and storm drains. Do ... use vacuums or other machines to remove and Collect loose debris or litter before applying water. Do ... obtain the property owner's permission to dispose small amounts of power washing waste water to landscaped, gravel or unpaved surfaces. Do ... check with your local san itary sewer agency's policies on wash water disposal regulations. (See list on reverse side). Do ... be aware that if discharging to landscape areas, soapy wash water may damage landscaping. Residual wash water may remain on paved surfaces to evaporate. Sweep up solid residuals and dispose of properly. Vacuum booms are another option for capturing and collecting wash water. Do not l et...wash or wastewater from sidewalk, plaza or building cleaning go into a street or storm drain. Report illegal storm drain disposal, Call Toll Free 1-800-506-2555 Using Cleaning Agents Try using biodegradablelphosphate-free products. They are easier on the environment, but don't confuse them for being toxic free. Soapy water entering the storm drain system 0a impact the delicate aquatic environment. When cleaning surfaces with a high-pressure washer or steam elearier, additional precautions should be taken to prevent the discharge of pollutants Into the storm drain system. These two methods of surface cleaning can loosen additional material that can contaminate local waterways - Think Wager Conservation Minimize water use by using high pressurer low volume nozzles. Se sure to check all hoses for leaks. Screening Wash Water A thorough dry cleanup before washing exterior surfaces, such as buildings and decks mthout ipose pant, sidewalks, or plaza areas should be sufficient to protect receiving waters. Keep debris from entering the storm drain after cleaning by first passing the wash water first through a "20 mesh" or finer screen to catch the solid matenals, then disposing the mesh in a refuse container. Drain Znlet Protection & Collection of Wash Water * Prior to any washing, block all storm drains with an impervious harner such as sandbags or berms, or seal the storm drain with plugs or rubber mats. • Create a containment area with beans and traps arta ke advantage of a low spot to keep wash water contained- ■ Wash vehicles and equipment on grassy OF gravel areas so that the wash water can seep into the ground. Pump or vacuum up all wash water in the contained area - Equipment and Supplies For special matenals, equipment and supplies: • New Pig — (800) 468-4647 • Lab Safety Supply -- (800) 356-0783 • C&H — (800) 558-40966 • W.W. Grainger — (800) 994-9174 • Cleaning Equipment Trade Association — (800) 441-Otll Adopt a pet from your local animal shelter or adaption centers at pet stores. A variety of animals, from purebred tom ixe d breed are waiting for loving arms and good homes. Considert' volunteering otyourlocal animal �> shelters. Volunteers, donations, food, newspapers, old towels and linens are needed to help the animals, BLYTHE 16450 West Hobson Way Blythe, CA 92225 760-921-7857 HEMET 800 South Sanderson Hemet, CA 92545 909 925-8025 IwdxO 45-355 Van Buren Indio, CA 92201 760-347-2319 RIVERSIDE 5950 Wilderness Avenue Riverside, CA 92504 909-358-7387 FOR ALL OTHER AREAS CALL 1-888-636-7387 Riverside County =fully ack=edges the GTy of Lns Angelea Stor+nwater Prbgmm for the design caxcpt of th.s brochure .",- W 4e TIPS FOR A HEALTHY PET AND A HEALTHIER ENVIRONMENT CkEATI~ A HEALTHY ENVIRONMENT in and around your home by following these simple pet practices. Your pet, fami-ly and neighbors will appreciate their clean comfortablesurroundings. HOUSEHOLD PETS We all love our pets, but pet waste is a subject everyone likes to avoid. Pet waste left on trails, sidewalks, streets, and grassy areas is immediately flushed into the nearest waterway when it rains. Even if you can't see water near you, the rain or waste water WASHES all that PET WASTE and BACTERIA INTO THE STORMDRAIN, where it travels to your neighborhood creek or lake untreated. These animal droppings also contain nutrients that can promote the growth of algae, if they enter our streams and lakes. The risk of STORMWATER CONTAMINATION INCREASES, if pet wastes is allowed to accumulate in animal pen areas or left on sidewalks, streets, or driveways where runoff can carry them to storm sewers. Some of the DISEASES THAT CAN SPREAD from pet waste are: Campylobacteriosis — a bacterial infection that causes diarrhea in humans. Salmonellosis — the most common bacterial irtf action transmitted to humans from animals. Toxocarisis — roundworms transmitted from animals to humans. Flies and other pest insects can also increase when pet waste is disposed of improperly, becoming a nuisance and adding yet another vector for disease transmission. WHAT CAN YOU DD? 5COOP up pet waste and flush it down the toilet. • NEVER DUMP pet waste into a storm drain or catch basin. • USE the complimentary BAGS or mutt mitts offered in dispensers at local parks. • CARRY EXTRA BAGS when walking your dog and make them available to other pet owners who are without. • TEACH CHILDREN how to properly clean up after a pet. • TELL FRIENDS AND NEIGHBORS about the ill effects of animal waste on the environment. Encourage them to cleanup after pets. Did You Know ... that Californians illegally dump about 80 million gallons of motor oil each year? e"N - , �• ." ..T ` at eta 1E, Many communities have "Scoop the Poop" Imus that govern pet waste cleanup_ Some of these laws specifically require anyone who walks an animal off of their property to carry a bag, shovel, or scooper. Any waste left by the animal m ust be cleaned up immediately_ CALL YOUR LOCAL CODE ENFORCEMENT OFFICER to find out more about pet waste regulations. Pets are only one of the many fixtures of suburban America that add to water pollution, Lawn fertilizers, rinse water from driveways and motor oil commonly end up in streams and lakes. CALL 1-8W-506-2536 FOR HOUSEHOLD HAZARDOUS WASTE COLLECTION LOCATION AND DATES. Maintain your automobile to avoid leaks. bispose of used vehicle fluids properly. Your pets can be poisoned if they ingest gas, oil or antifreeze that drips onto the pavement or is stored in open containers. NEVER HOSE VEHICLE FLUIDS into the street or gutter. USE ABSORBENT MATERIALS such as cat litter to clean- up spills. SWEEP UP used absorbent materials and place in thetrash. HORSES AND LIVESTOCK Fortunate enough to own a horse or livestock? You, too, can play a part in protecting and cleaning up our water resources_ The following are a few simple Best Management Practices (amps) specifically designed for horse owners and landowners with horses. • STORE your manure properly. Do not store unprotected piles of manure in places where runoff may enter streams, or flood waters may wash the manure away. Place a cover or tarp over the pile to keep rainwater out. • CHECK with your local conservation district to design manure storage facilities to protect water quality. These structures usually consist of a concrete pad to protect ground water and a short wall on one or two sides to make manure handling easier. TRY composting - A vegetative cover placed around buildings or an steeper slopes can help minimize erosion and absorb nutrients while improving the appearance of yourCL property. In addition, avoid costlier erosion controls, vegetative covers will provide animals with better traction during wet or icy conditions. KEEP animals out of steams - besigned stream crossings provide a safe, easy way for horses and livestock to ford streams. Fencing encourages the use of the crossing instead of the streambed to navigate streams. This will allow vegetation to stabilize stream banks and reduce sediment pollution. MOW pastures to proper height, six inches is typically recommended. Material 5TORAGE SAFETY TIPS - Many of the chemicals found in barns require careful handling and proper disposal. When using these chemicals, be certain to follow these common sense guidelines: • Buy only what you need. Treat spills of hoof oils like fuel spill. Use kitty litter tosoak up the oil and dispose in a tightly sealed plastic bag. • Store pesticides in a locked, dry, well -ventilated area. • Protect stored fertilizer and pesticides from rain and surface water_ Call 1 -BW -505-2555 to locate your local conservation district to find out what to do with your current backyard manure pile, how to re-establish a healthy pasture, what to do about weeds, and what grasses grow best in your soils. Thank you for doing your part to protect your watershed, the environment, and the equestrian way of life in your community! r � l ::� pllolili�5 8�d �Irll�� itivERS OF, COUNTY WATER AGENCFEs- Cop Df 39,rr1a1r1 05 1 y fF27313C Ciryd3ea ma# 5351}789-"A CiIV a SIWn {logyva_5161 Cary d .0a hnae (760) 396,15o: Citt'J*1L1 Vallal'VVa6cr olcg&1 ;t843}398_2051 ClyatCw a3151) 736-W OasortCenkr.OSA ArS [1A 221.3m EasternmondpolMier plWO t3d719291777 Ekmwa Way UWQ Iasi 614-314E Farm Mdlwl WWte C cora rly 1$5IW4419F Gry e41•14 m -t ZsS "I'll" Dslr4C 79,23174 1-1W"'IVSfnixsDEMO 1S1)3p4m4� La.e Hamel PA"U (951)858-9241 Lee Leie Wheyl w-1 43.54y?77.1d1d. wich lir farce ilio (961}694.146( 11111601rnDani 760)724440 Gy 10 m3 (11300 23-1125-1 RArrbm r.AhAlb" (757 7!4lA77i Ral,Wtm calAmnia w2lar Oralrai {95t 286$90[ R1pkry ['GJ[p82 f7Fr1541?7-0NTiI Cly of .` -much {g5s }951.81 i[ Ri lfrN ry t'rynnsx,rll. {nmres rfrsr" (4511 At4.IW Mant lieilpy Chr6 Inc ($$1)$40-4681 Vaiey Sar -A" Cestrret I16% y{ 7-n5E We :ler, t llleripal wncr Dkzirrt (4J1y19m= V A4.. VA" VYnrnrrY '. H ErM1 "I 4117 GALL 4-800-586-2555 to: Repwr mow slarm Bram or dlf�" sern emir ckwosel imn yVee[5, saamltearn aneLOr lvatar , rend wR aawr wrvinwtatrnrnolrnwaireal wr.e+mr>nmalarllu, 6•=U T[t siwef MW the of lism4*011 4Wa'diriri V"An MH*1 COKKU01 E." N+'rR+ep wlh4 .,ryrnrr.cnrs acla.s.rom pw4rd6rllaw • Ladeo6leeGauNf•t'+1v.nrin7Cn{alsLru'Cis fteunve yrrrscydklsi FOLrrpeaan Hod COM" RW WiNUgp rdontiahc , tlr vs90 411 lRrvers[le Ccxrr" Fbod COMO 1S18tCt Tw8b$1 8 01 1i7 rtaorvrvl.w.riw+ritla.ca.l�s pater Hairs to addillonal SMM drain p-WNHon 1411 manan Cntnly H i2rlidYlnq Pr'Vlrnnmwial FWaaF 'A'Pr" r!Ktrgg - Catiksrr,i: Sta6y 1Aalpr iasnsrres. Cnncarvarlcvr tlrsxrl - r'pA'VNrM,'r6x7a V'ra et-Uphiv Task N11x111mr Fa. -a • iJrWed S.ase EE rral Prekcam AponcY i��1 �6^!Y!sey�•9w�9prl1]1S •i�iF'�wilk�x �ns+l�YrutprL. 1101 [rrnglu.rrA n.aiuen.. i�a.,r.��, RRemdr (;aumt ()q* tRan u- Ina STunn Ormrr I'WkltWn '+01B5tw11 arr,p,irrrr fwlsh,lry ar,M16wIP= 1h^ 11;ly hr9a :.Yarrri.0tL Manager nerd A.(arx3n, Aslsnhda6ll ar,6{ IMI G•3arIU1 } Fel ui INnt: n1 -:alk .13+47NwM T rrlfk AIAIlt,ri nn'+YdeJ 1t thg r.nrrrr.rn: SIOIOIYB11 P8119011 What you sho4fd know fm., Swimming Peed, Jacuza' and Faunnin NaMnance Do you %naw where the water actually goes? —" Storm Drains are not connected is senitery f • sewer sVstenm and treatment plants! The primary purpose of storm drains is to carry rain water away front developed areas to prevent flooding. Untreated storm water and the pollutants it carries flow directly Into rivers, takes, and streams. Wastewater from residential swimming pools, jacuzzis, fishponds, and fountains often contain chemicals used for sanitizing or cleansing purposes. Toxic chemicals (such as chlorine or copper -based algaecides) can damage the environment when wastewater is allowed to flow into our local rivers, lakes. and streams by way of the storm drain system. Each of us can do our part to help clean our water, and that adds up to a pollution solution - The Cities and County of Riverside have adopted ordinances forstorm drain pollution management to maintain d scharge control and prevent illegal storm drain discharge. In accordance wits state and federal law, these local storm water ordinances prohibit the discharge of pollutants into the storm drain system or vocal surface waters. The Only Rain in the Storm Drain Pollution Program informs residents and businesses of storm drain pollution prevention activities such as those described in this brochure. PLEASE NOTE: The discharge of palutants into the street, gutters, storm drair system, or waterways —without a Reglonnt Water Quality Control board permit or waiver— is strictly prohibited by local ordirances and state and federal •aw. Do Your Part to Protect for IvateIrw SYS1 ` Use These Guidelines For Proper Drainino of Your SMmming Pool, Jaid and Fountain Water Discharge Regulations Requirements for pool draining may dMerfrovtcity -o city. Check with your water agency to see if disposal to the sanitary sewer line is f . allowed for poo; disehorgies fsee reverse side for Riverside County water purveyorsl It sewer discharge is allowed, a hose can be MCI from your swm)nx ng pool pu-np to the wasning machine drain ora sink or bathtub. f sewer dianharge is not a#lowed, or if your house is served by a septic tank, review the options presented below. Discharge Options Refinishing Pool Surfaces if you are resurfacing yuur pluut, or resurfacing the pool patio area. bo sure to hose down mixers. tools and trailers in a dirt area where rinse water won't flow into ire street, gutter or storrn drain. Local storm water ordinances strictly prohibit the discha-ge of pcilulants into the storm dran system. Residues from acid washing and similar activities require special Candling. Never discha•ge low or high pH wastewater fnto the street. gutteror storm drain. ■w if your local sewer agency will not accapt pons water into their system, or if you are on a septictanksystem, follow thesecluidellnes: FIs 1. Reduce or Onninale solids (e.g., debris, leaves or dirt) n the pool water. 2. Allcw the chemicals in the pool water to dissipate. This Could take up to seven (7) days depending on the time of year_ Create a co-oo: let your neighharshare your pool while theirs is being prepared for draining, lhert use their pool whde ymrs is being drained. Ch,orinated water should not be discharged into the store drain or surface waters This ncludes large Gans such as community swirnrning pools or spas. 3. When the pool grater Is tree of all chamlcas (verity by a home pool water test Kit) drain pool water to Landscaped areas, towns, yards, or any areas that vnll absoit the water. d. You may have todrainthe pool water overa period ofa few days to aliawthe landscape areas to absorb most of the water. 5. Contrcl &e flow of the drairing pool water to prevent soil erosion. Do not allow sediment to enter the street, gutta ror storm drain . 6. Avoid discharging pool water into the street acid storm drain system. Water runoff that enters the streetcan pick up motorod, pet waste, trash and other pollutants, eventually carrying thorn into the storm drain systern and local surface •maters . Cleaning Filters Discharge of pool filter -ince water and backflush to a strearn, ditch. or storm drain is prohibited. Backflush from pool Filters must be dischargeq to the san!tary sewer, on-s-te septic tank and drain field system (fir prope•iy designed and adequately sizedi. or a seepage pit. Alternatively, pool filter rinse water and backwash maybe divered to dirt or landscaped areas. Filter media and other solids should be picked up and disposed otin the trash. Chemical Stnragn Handling Use only ttte am indicated on prods labels. Store chlorne and other chemicals in a coveted area to prevent runofr. Keep ou I of reach of children and pets. CPlonrie kits. avahuuIc ar retail swimming pool equipment and supply stores, should be used to monitor the chlonne and plf levels. Algaecides Avoid using copper rased algaec des unless absolute y necessary Control algae with chterine, organ+c p01yme16 ur other alleriatives :a rnppar-hACAd pnnl cherniCals. Copper is a heavy metal :hat can baso%tC al aquatlCslfe Chlorine and other pcol chemicals should never be allpwad to flow into tate gutter or the storm drain system. Proper Disposal of Pool Chemicals It you need to dispose of unwanted pool chem ioala, first try giving them to a neighbor w.tn a pool. 11 that doesn't work, bring unwanted pool chemicals to a Household Hatardinu5 Wastp (HHL'V) Calle,-tion Event There's no cost Ior bringing HHW items to collection vents - Its FREEI Call 1.800.306- 55 for a schedule of HHW events in cormrnunity. NEVER put unused chemicals into the trash, onto the ground or dawn a storm drain. Whitewater River Region WQMP Tract Map No. 38744 Appendix E Soils Report iedden Engineering 45090 Gaff Center Parkway, Suite F, Indio, CA 92201 (760) 863-0713 Fax (760) 863-0847 6782 Stanton Avenue, Suite A, Buena Park, CA 90621 (714) 523-0952 Fax (714) 573-1369 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 December 10, 2013 Griffin Ranch Investors, LP 23 Corporate Plaza, Suite 150 Newport Beach, California 92560 Project: Mery Griffin Estate Property 81-345 Avenue 54 La Quinta, California Subject: Geotechnical Update Project No. 544-13302 13-11-525 Ref: Geotechnical Investigation report prepared by Sladden Engineering dated August 17, 2004; Project No. 5444402, Report No. 04-08-571 As requested, we have reviewed the above referenced geotedinical investigation report as it relates to the design and construction of the proposed future residential parcels within the Mery Griffin Estate property. The project site is located at 81-345 Avenue 54 in the City of La Quinta, California. It is our understanding that future residences are proposed for the undeveloped portion of the property. It is our understanding that the proposed future residences will be a relatively lightweight wood -frame structures supported by conventional shallow spread footings and concrete slabs on grade. In order to provide uniform foundation bearing conditions and to mitigate potential seismic settlements, we recommend over -excavation throughout the proposed future residential building areas. The building areas should be over -excavated to a depth of at least 3 feet below existing grade or 3 feet below the bottom of the footings, whichever is deeper. The soil exposed during over -excavation should be scarified to a depth of approximately 8 inches, moisture conditioned and compacted to at least 90 percent relative compaction. The excavated material may then be replaced as engineered fill material. Over -excavation should extend laterally a minimum of a feet beyond the building footprint. The proposed future residential structures may be supported upon conventional shallow spread footings and concrete slabs on grade. Footings should extend at least 12 inches beneath lowest adjacent grade for single -story structures and 18 inches below lowest adjacent grade for two- story structures- Isolated square or rectangular footings should be at least two feet square and continuous footings should be at least 12 inches wide. Continuous footings may be designed using an allowable bearing pressure of 1500 pounds per square foot (pso and isolated pad footings may be designed using an allowable bearing pressure of 1800 psf. The allowable bearing pressures are applicable to dead and frequently applied live loads. The allowable bearing pressures may be increased by 1/3 to resist wind and seismic Ioading. Care should be taken to see that bearing or subgrade soil is not allowed to become saturated from the ponding of rainwater or irrigation. Drainage from the building areas should be rapid and complete. December 10, 2013 -2- Project No. 544-13302 13-11-525 The recommendations provided in the preceding paragraph are based on the assumption that all footings will be supported upon properly compacted engineered fill soil. All grading should be performed under the testing and inspection of the Soil Engineer or his representative. Prior to the placement of concrete, we recommend that the footing excavations be inspected in order to verify that they extend into compact.soil and are free of loose and disturbed material. Resistance to lateral loads may be provided by a combination of friction acting at the base of the slabs or foundations and passive earth pressure along the sides of the foundations. A coefficient of friction of 0.40 between soil and concrete may be used with consideration to dead load forces only. A passive earth pressure of 250 pounds per square foot, per foot of depth, may be used for the sides of footings that are placed against properly compacted native or approved non - expansive import soil. Passive earth pressure should be ignored within the upper 1 foot except where confined (such as beneath a floor slab). The surface soil is non -expansive and fall within the "very low" expansion category in accordance with California Building Code (C Q classification criteria. Based on our field observations and understanding of local geologic conditions, the soil profile type judged applicable to this site is Sn, generally described as stiff sail. The following presents additional coefficients and factors relevant to seismic mitigation for new construction based upon the 2010 California Building Code (CBC). The seismic design category for a structure may be determined in accordance with Section 1613 of the 2410 CBC or ASCE7. According to the 2010 CBC, Site Class D may be used to estimate design seismic loading for the proposed structures. The 2010 CBC Seismic Design Parameters are summarized below. Occupancy Category ('Fable 1604.5):11 Site Class (Table 1613.5,5): D Ss (Figure 1613.5.1:1.50g Si (Figure 1613.5.1:0,60g Fa (Table 1613.5.3(1)):1..0 Fv (Table 1613.5.3(2)):1.5 Sms (Equation 16-36 (Fa XSsI):1.508 Smi (Equation 16-37 11;v X Sl)): 0.90g 505 (Equation 16-38 12/3 X Sms)): 1.00g SDI (Equation 16-49 1213 X Swi)). 0.60g Seismic Design Category D LIR December 10, 2013 -3- Project No. 544-13302 13-11-525 If you have questions regarding this letter or the referenced report, please contact the undersigned. Respectfully submitted, 5LADDEN ENGINEERING Brett L. Andersori = BRIM ANMRSOM Principal Engineer r4o-CAMe9 Exp. 9W14 clm SER/gvm �E t•r�c;r!t=eRtr�� Copies. 4/ Griffin Ranch Investors, LP r 1,5 l GEG7`EC jjjV PRdtC,4L lIVVESTIGA'�Opv RESipg �RIFFlN �N� sic Av�Nv�� AN� ��o�� XfA!]ISON ST.RE E7, LA QWNTA, CA! PORNIA I$epvedY- S1 dd� �xi nf- 39_g25 GaMWg palm r)eseM, Ca Lane, suit"G C76�} C fomia 92211 3893 (* Sladden Engineering 8782 Stanton Ave., Suite A, Buena Park, CA g0621 (714) 5234D952 Fax (714) 52.3-1369 39-725 Garand Ln., Suite G, Palm Desert, CA 92211 (760) 772-3893 Fax (760) 772-3895 August 17,2Q4 Project No. 54444o2 04-08-571 Transwest Housing, Inc. 47-120 Dune Palms Road, Suite C La Quinta, California 92253 Attention: Mr. Rad Grinberg Project: Proposed Griffin Ranch Residential Development SEC Avenue 54 and Madison Street La Quints, California Subject: Geotechnical Investigation Presented herewith is the report of our Geotechnical Investigation conducted for the construction of the proposed approximately 198 -acre residential development to be located on the southeast comer of Avenue 54 and Madison Street in the City of La Quints, California, The investigation was performed in order to provide recommendations for site preparation and to assist in foundation design for the Proposed residential structures and the related site improvements. This report presents the results of our field investigation and laboratory testing along with conclusions and recommendations for foundation design and site preparation. This report completes our original scope of services as outlined within our proposal dated July 8, 2004. We appreciate the opportunity to provide service to you on this project. If you have any questions regarding this report, piease contact the undersigned Respectfully submitted, SLAI;DEN EINGINEE G Brett L. Anderson Principal Engineer SER/pc Copies: 6/Transwest Housing GEOTECHNICAL INVESTIGATION PROPOSED GRIFFIN RANCH DEVELOPMENT SBC AVENUE 54&MADISON STREET LA QUINTA, CALIFORNIA August 17,2004 TABLE OF CONTENTS INTRODUCTION- ...........................'.............................. .................................................'��. I SCOPEOFWORK ....... -.............................................................. ......................................................... I PmOJEC-1uuSCRacxIOm................................................................................................................... GEOLOGY AND SEISMICITY ................................................... ......... --- ....... .... ............................ 2 -----'-'-----''--'-----~~-----'-'-------'-^--~~-~-~^~^--'^'---'----'-'~ --~�'--''-_-''-............... ........................... '......... ...... ........... ........ ........................... ...... ......... 3 CONCLUSIONS AND RECOMMENDAnONS ................ ............. ................................................. 3 FoundationDesign ............................. ................. ................................................. ........................ 4 Settlements................................................................... ............................................. ...................... 5 LateralDesign ............. ..... ....................................... ........... .......................... ....................... .... 5 RetainingWalls ................ .......................... .......................................... ........................................... S ExpansiveSoils ................................. ...... .......... .............................. ............................................ 5 cmnonmma........................ ........................................ ~'............................................ 5 SolubleSulfates ........................... ................................................................................................... 8 TentativePavement Design ......... .................... ..................................... ......................... -.......... 8 Shrinkageand Subsidence ......................... .......................................................... ~........ ............. 6 GeneralSite Grading ................ -..... ............................................. ............... _...................... ...... , 6 1. Site Clearing ...............................................--_-___'-- .........................8 %- Preparationm6 Building and Foundation Areas .................................... ........................... 7 3~Placement mf Compacted Fill .-.................. .................................................................... - 7 4. Preparation of Slab and Pavement Arems............... ............................. --_................ 7 5`Testing and Inspection ................................. ......................................................... ~........... 7 GENERAL.............. ................................... ............. ...... .................. --._--____._--_ 0 APPENDIXA- Site Plan and Boring Logs Geld Exploration APPENDIX B- Laboratory Testing Laboratory Test Results APPENDIX C- 2097UBC Seismic Design Criteria l August 17, 2004 -1- Project No, 544-4402 04-0$-57 t INTRODUCTION This report presents the results of our Geotechnical Investigation performed in order to provide recommendations for site preparation and to assist in the design and construction of the foundations for the single-family residences proposed for the Griffin Ranch development_ The project site is located on the southeast corner of Avenue 54 and Madison Street in the City of Ira Quinta, California. The preliminary plans indicate that the proposed project will include single-family residences along with various associated site improvements. The associated site improvements are expected to include paved roadways, concrete driveways and patios, underground utilities, and landscape areas. SCOPE OF WORK The purpose of our investigation was to determine certain engineering characteristics of the near surface soils on the site in order to develop recommendations for foundation design and site preparation. Our investigation included field exploration, laboratory testing, literature review, engineering analysis and the preparation of this report. Evaluation of hazardous materials or other environmental concerns was not within the scope of services provided. Our investigation was performed in accordance with contemporary geotechnical engineering principles and practice. We make no other warranty, either express or implied. PROJECT DESCRIPTION The approximately 195 -acre project site is located on the southeast corner of Avenue 54 and Madison Street in the City of La Quinta, California, It is our understanding that the project will consist of single- family residences along with various associated site improvements_ It is our understanding that the proposed residences will be of relatively lightweight wood -frame construction and will be supported by conventional shallow spread footings and concrete slabs on grade. The associated improvements will include paved roadways, concrete walkways, patios, driveway% landscape areas and various underground utilities. The majority of the subject site is presently vacant and the ground surface is covered with scattered desert brush, short grass and weeds. large tamarisk trees exist along the majority of the property lines. The majority of the property has apparently been previously used for agricultural purposes. The property has been leveled throughout and is near the elevation of the adjacent properties and roadways. The Griffin estate located within the central portion of the property is not a part of the proposed project. The eastern portion of the Griffin estate including a horse racing track and fields are a part of the proposed development. The PGA West development Forms the southern site boundary and exists west of the site across Madison Street. There is a residential subdivision along the southeastern edge of the site. The properties along the northeast property boundary and north of the site across Avenue 54 remain vacant. Sladden Engineering August 17, 2t -2- project No. 544-4402 i14-08-571 Based upon our previous experience with lightweight residential structures, we expect that isolated column loads will be less than 30 kips and wall loading will be less than to 2.0 kips per linear foot. Grading is expected to include minor cuts and fills to match the nearby elevations and to construct slightly elevated building pads to accommodate site drainage. This does not include removal and recompaction of the bearing soils within the building areas. If the anticipated foundation loading or site grading varies substantially from that assumed the recommendations included in this report should be reevaluated. GEOLOGY AND SEISMICITY The project site is located within the central Coachella Valley that is part of the broader Salton Trough geomorphic province. The Salton Trough is a northwest trending depression that extends from the Gulf of California to the Banning Pass. Structurally the Salton Trough is dominated by several northwest trending fault% most notable of which is the San Andreas system. A relatively thick sequence of sedimentary rocks have been deposited in the Coachella Valley portion of the Salton 'Trough from Miocene to present times. These sediments are predominately terrestrial in nature with some lacustrian and minor marine deposits. The mountains surrounding the Coachella Valley are composed primarily of Precambrian metamorphic and Mesozoic granitic rock. The Coachella Valley is situated in one of the more seismically active areas of California. The San Andreas fault zone is considered capable of generating a maximum credible earthquake of magnitude 8.0 and due to its proximity to the project site the distance of approximately 9.9 kilometers should be considered in design fault for the project. Seismic activity along the nearby faults continues to affect the area and the Coachella Valley is considered one of the more seismically active regions in California. A computer program and pertinent geologic literature were utilized to compile data related to earthquake fault zones in the region and previous seismic activity that may have affected the site. E.Q. Fault Version 3.00 (Blake) provides a compilation of data related to earthquake faults in the region. The program searches available databases and provides both distances to causitive faults and the corresponding accelerations that may be experienced on the site Clue to earthquake activity along these faults. The attenuation relationship utilized for this project was based upon Joyner & Boore (1987) attenuation curves. The information generated was utilized in our liquefaction evaluation The site is not located in any Earthquake Fault zones as designated by the State but is mapped in the County's Liquefaction and Ground Shaking Hazard Zone V. Several significant seismic events have occurred within the Coachella Valley during the past 50 years. The events include Desert Hot Springs - 1948 (CSS Magnitude), Palm Springs - 1986 (5.9 Magnitude), Desert Hot Springs - 1992 (6.1 Magnitude), Landers - 1992 (7.5 Magnitude) and Big Bear -1992 (6.6 Magnitude). Sladden Engineering August 17, 2004 -3- Project leo. 544-4402 Q4-08-571 SUBSURFACE CONDITIONS The soils underlying the site consist primarily of fine-grained silty sands with scattered generally thin sandy clayey silt layers. As is typical for the area, the silty sand and sandy silt layers are inconsistently interbedded and vary in thickness. Silty sands were the most prominent soils within our exploratory borings but several prominent sandy silt and clayey silt layers were also encountered. The silty sands encountered near the existing ground surface appeared somewhat loose but the deeper silty sand and sandy silt layers appeared relatively firm. Sampler penetration resistance (as measured by field blowcounts) indicate that density generally increases with depth. The site soils were dry on the surface but moist below a depth of approximately S feet. Laboratory testing indicates that the surface soils within the upper 5 feet consist primarily of silty sands. Expansion testing indicates that the surface silty sands are generally non -expansive and are classified as "very low" expansion category soils in accordance with Table 18-1-B of the 1997 Uniform Building Code. Groundwater was not encountered within our borings that extended to a depth of approximately 50 feet below the existing ground surface. Groundwater should not be a Factor in design or construction. LIQUEFACtTON Liquefaction occurs with sudden loss of soil strength due to rapid increases in pore pressures within cohesionless soils as a result of repeated cyclic loading during seismic events. Several conditions must be present for liquefaction to occur including; the presence of relatively shallow groundwater, generally loose soils conditions, the susceptibility of soils to liquefaction based upon grain -size characteristics and the generation of significant and repeated seismically induced ground accelerations. Liquefaction affects primarily loose, uniform grained cohesionless sands with low relative densities, In the case of this project site, several of the factors required for liquefaction to occur are absent. As previously indicated, groundwater was not encountered within our borings that extended to a depth of approximately Sit feet below the existing ground surface on the site. Due to the depth to groundwater, the potential for liquefaction affecting the site is considered negligible. CONCLUSIONS AND RECOMMENDATIONS Based upon our field investigation and laboratory testing, it is our opinion that the proposed residential development is feasible from a soil mechanic's standpoint provided that the recommendations included in this report are considered in building foundation design and site preparation. Due to the somewhat loose condition of the surface soils, remedial grading is recommended for the building areas. We recommend that remedial grading within the proposed building areas include the overexcavation and recompaction of the primary foundation bearing soils. Specific recommendations for site preparation are presented in the Site Grading section of this report. Sladden Engineering August 17, 2004 -d- Project No. 514-4402 04-08-571 Based upon the depth to groundwater and the generally firm condition of the deeper sand layers, it is our opinion that the potential for liquefaction affecting the site is minimal. The remedial grading recommended for building areas will result in the construction of a uniform compacted soil rout beneath all footings. In our opinion, liquefaction related mitigation measures in addition to the site grading and foundation design recommendations included in this report should not be necessary. The site is located in one of the more seismically active areas in California. Design professionals should be aware of the site setting and the potential for earthquake activity during the anticipated life of the structure should be acknowledged. The accelerations that may be experienced on the site (as previously discussed) should be considered in design. The seismic provisions included in the Uniform Building Code for Seismic Zone 4 should be considered the minimum design criteria. Pertinent 1997 LJ8C Seismic Design Criteria is summarized in Appendix C. Caving did occur within our borings and the potential for raving should be expected within deeper excavations. All excavations should be constructed in accordance with the normal CaIDSHA excavation criteria. On the basis of our observations of the materials encountered, we anticipate that the near surface silty sands will be classified by CaJOSHA as Type C. Soil conditions should be verified in the field by a "Competent person" employed by the Contractor. The near surface soils encountered during our investigation were found to be non -expansive. Laboratory testing indicated an Expansion Index of 0 for the surface silty sands and sandy silts that corresponds with the "very low" expansion category in accordance with UBC Table 18 -I -B. The following recommendations present more detailed design criteria which have been developed on the basis of our field and laboratory investigation. The recommendations are based upon non -expansive soils criteria. Foundation Design: The results of our investigation indicate that either conventional shallow continuous footings or isolated pad footings that are supported upon properly compacted soils, may be expected to provide adequate support for the proposed structure foundations. Building pad grading should be performed as described in the Site Grading Section of this report to provide for uniform and firm bearing conditions for the structure foundations. Footings should extend at least 12 inches beneath lowest adjacent grade. Isolated square or rectangular footings should be at least two feet square and continuous footings should be at least 12 inches wide. Continuous footings may be designed using an allowable bearing value of 1500 pounds per square foot (psf) and isolated pad footings may be designed using: an allowable bearing pressure of 1800 psf. The allowable bearing pressures are applicable to dead and frequently applied live loads. The allowable bearing pressures may be increased by 1/3 to resist wind and seismic loading. Care should be taken to see that bearing or subgrade soils are not allowed to become saturated from the ponding of rainwater or irrigation. Drainage frorn the building area should be rapid and complete. _..._--__—_-__---. _ -- _ - - --- --• �----5[adden Engineering August 17, 24174 -5- project No. 544-4402 04-08-571 The recommendations provided in the preceding paragraph are based on the assumption that all footings will be supported upon properly compacted engineered fill soils. All grading should be performed under the testing and inspection of the Soils Engineer or his representative. Prior to the placement of concrete, we recommend that the footing excavations be inspected in order to verify that they extend into compacted soil and are free of loose and disturbed materials. Settlements: Settlements resulting from the anticipated foundation loads should be minimal provided that the recommendations included in this report are considered in foundation design and construction. The estimated ultimate settlements are calculated to be approximately one 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. LaterA Design: Resistance t6 lateral loads can be provided by a combination of friction acting at the base of the stabs or foundations and passive earth pressure along the sides of the foundations. A coefficient of friction of 4.40 between soil and concrete may be used with consideration to dead load forces only. A passive earth pressure of 2.50 pounds per square foot, per foot of depth, may be used for the sides of footings that are poured against properly compacted native or approved non -expansive impart soils. Passive earth pressure should be ignored within the upper 1 foot except where confined (suds as beneath a floor slab). Retaining WaM: Retaining walls may be necessary to accomplish the proposed construction. Lateral pressures for use in retaining wall design can be estimated using an equivalent fluid weight of 35 pcf for level free -draining native backfill conditions. For walls that are to be restrained at the top, the equivalent fluid weight should be increased to 55 pcf for level free - draining native backfill conditions. Eackdrains should be provided for the full height of the walls. Expansive Soils: Due to the prominence of "very low" expansion category soils near the surface, the expansion potential of the foundation bearing soils should not be a controlling factor in foundation or floor slab design. Expansion potential should be reevaluated subsequent to grading. Concrete Slabs -on -Grade: All surfaces to receive concrete slabs -on -grade should be underlain by a minimum compacted non -expansive fill thickness of 24 inches, placed as described in the Site Grading Section of this report. Where slabs are to receive moisture sensitive floor coverings or where dampness of the floor slab is not desired, we recommend the use of an appropriate vapor barrier or an adequate capillary break. Vapor barriers should be protected by sand in order to reduce the possibility of puncture and to aid in obtaining uniform concrete curing. Reinforcement of slams -on -grade in order to resist expansive soil pressures should not be necessary. However, reinforcement will have a beneficial effect in containing cracking due to concrete shrinkage. Temperature and shrinkage related cracking should be anticipated in all concrete slabs -on -grade. Slab reinforcement and the spacing of control joints should be determined by the Structural Engineer. .Madden Engineering l August 17, 2004 -b_ Project No. 544-4402 04-08-571 Soluble Sulfates: The soluble sulfate concentrations of the surface soils have not yet been determined but native soils in the area have been known to be potentially corrosive with respect to concrete. The use of Type V cement and specialized sulfate resistant concrete mix designs may be necessary for concrete in contact with the native sails. Tentative Pavement Design: All paving should be underlain by a minimum compacted fill thickness of 12 inches (excluding aggregate base). This may be performed as described in the Site Grading Section of this report. R -Value testing was not conducted during our investigation but based upon the sandy nature of the surface soils, an R -Value of approximately 50 appears appropriate for preliminary pavement design. The following preliminary onsite pavement section is based upon a design R -Value of 50. Onsite Pavement (Traffic Index = 5.0) Use 3.0 inches of asphalt on 4.5 incites of Class 2 base material Aggregate base should conform to the requirements for Class 2 Aggregate base in Section 26 of CalTrans Standard Specifications, January 1992. Asphaltic concrete should conform to Section 39 of the CalTrans Standard Specifications. The recommended sections should be provided with a uniformly compacted subgrade and precise control of thickness and elevations during placement. Pavement and slab designs are tentative and should be confirmed at the completion of site grading when the subgrade soils are in-place. This will include sampling and testing of the actual subgrade soils and an analysis based upon the specific traffic information Shrinkage and Subsidence: Volumetric shrinkage of the material that is excavated and replaced as controlled compacted fill should be anticipated. We estimate that this shrinkage could vary from 20 to 25 percent. Subsidence of the surfaces that are scarified and compacted should be between 0.1 and 0.3 tenths of a Foot. This will vary depending upon the type of equipment used, the moisture content of the soil at the time of grading and the actual degree of compaction attained. 'These values for shrinkage and subsidence are exclusive of losses that will occur due to the stripping of the organic material from the site and the removal of oversize material. General Site Grading: All grading should be performed in accordance with the grading ordinance of the City of La Quinta, California. The following recommendations have been developed on the basis of our field and laboratory testing and are intended to provide a uniform compacted mat of soil beneath the building stabs and foundations. 1. Site Clearing: Proper site clearing will be very important. Any existing vegetation, slabs, foundations, abandoned underground utilities or irrigation lines should be removed from the proposed building areas and the resulting excavations should be properly backfilled. Soils that are disturbed during site clearing should be removed and replaced as controlled compacted fill under the direction of the Soils Engineer. Sladden Engineering l August 17, 2004 -7- Project No. 5441402 04 -08 -ST 1 2. Preparation of Building and Foundation Areas; In order to provide adequate and uniform bearing conditions, we recommend overexcavation throughout the proposed residential building areas. The building areas should be overexcavated to a depth of at least 3 feet below existing grade or 2 feet below the bottom of the footings, whichever is deeper. The exposed soils should then be scarified to a depth of I -foot, moisture conditioned and recompacted to at least 90 percent relative compaction. The excavated material may then be replaced as engineered fill material as recommended below. 3. Placement of Compacted Fill: Within the building pad areas, fill materials should be spread in thin lifts, and compacted at near optimum moisture content to a minimum of 90 percent relative compaction. Imported fill material shall have an Expansion index not exceeding 20. The contractor shall notify the Soils Engineer at least 48 hours in advance of importing soils in order to provide sufficient time for the evaluation of proposed import materials. The contractor shall be responsible: for delivering material to the site that complies with the project specifications. Approval by the Soils Engineer will be based upon material delivered to the site and not the preliminary evaluation of import sources. Our observations of the materials encountered during our investigation indicate that compaction within the native soils will be most readily obtained by means of heavy rubber tired equipment and/or sheepsfoot compactors. A uniform and near optimum moisture content should be maintained during fill placement and compaction 4. Preparation of Slab and Paving Areas: All surfaces to receive asphalt concrete paving or exterior concrete slabs -on -grade, should be underlain by a minimum compacted fill thickness of 12 inches. This may be accomplished by a combination of overexcavation, scarification and recompaction of the surface, and replacement of the excavated material as controlled compacted fill. Compaction of the slab and pavement areas should be to a minimum of 90 percent relative compaction. 5. Testing and Inspection: During grading tests and observations should be performed by the Soils Engineer or his representative in order to verify that the grading is being performed in accordance with the project specifications. Field density testing shall be performed in accordance with applicable ASTM test standards. The minimum acceptable degree of compaction shall be 90 percent of the maximum dry density as obtained by the ASTM D1557-91 test method. Where testing indicates insufficient density, additional compactive effort shall be applied until retesting indicates satisfactory compaction. Sladden Engineering C August 17, 2004 Project No. 544-4402 04-05-571 GENERAL The findings and recommendations presented in this report are based upon an interpolation of the soil conditions between boring locations and extrapolation of these conditions throughout the proposed building area. Should conditions encountered during grading appear different than those indicated in this report, this office should be notified. This report is considered to be applicable for use by Trans West Development Inc. for the specific site and project described herein. The use of this report by other parties or for other projects is not authorized. The recommendations of this report are contingent upon monitoring of the grading operations by a representative of Sladden Engineering. All recommendations are considered to be tentative pending our review of the grading operations and additional testing, if indicated. If others are employed to perform any soil testing, this office should be notified prior to such testing in order to coordinate any required site visits by our representative and to assure indemnification of Sladden Engineering. We recommend that a pre -job conference be held on the site prior to the initiation of site grading. The purpose of this meeting will be to assure a complete understanding of the recommendations presented in this report as they apply to the actual grading performed. Sladden Engineering August 17, 2004 -9- Project No. 544-4402 04-08-571 REFERENCES ASCE Journal of Geotechnical Engineering Division, April 1974. Boore, Joyner and Furcal (1994) Estimation of Response Spectra and Peak Accelerations from North American Earthquakes, U. S. Geological Survey, Open Fite Reports 94-127 and 93-509. Finn, W. E. Liam, (19%) Evaluation of Liquefaction Potential for Different Earthquake Magnitudes and Site Conditiotu, National Center for Earthquake Engineering Research Committee. Joyner and Boore, (1988) Memrements, Characterization and Prediction of Strong Ground Motion, ASCE Journal of Geotechnical Engineering, Special Publication No. 20. Lee & Albaisa (1974) "Earthquake Induced Settlements in Saturated Sands". Seed and ldriss (1982) Ground Motiorss and Soil Liquefaction During Earthquakes, Earthquake Engineering Research Institute Monograph. Seed, Tokimatsu, Harder and Chung, (1985), Influence of SPT Procedures in Soil Liquefaction Resistance Evaluations, ASCE journal of Geotechnical EngVweri3n& Volume 111, No. 12, December. Rogers, Thomas H., Geologic Map of California, Santa Ana Map Sheet. Riverside County, 1984, Seismic Safety Element of the Riverside County General Plass Sladden Engineering APPENDIX A Site Plan Boring Logs APPENDIX A FIELD EXPLORATION For our field investigation, 16 exploratory borings were excavated on July 16 and August 4, 2004, using a truck mounted hollow stem auger rig (Mobile B-61) in the approximate locations indicated on the site plan included in this appendix. Continuous log of the materials encountered were prepared on the site by a representative of 5ladden Engineering. Boring logs are included in this appendix. Representative undisturbed samples were obtained within our baring by driving a thin-walled steel penetration sampler (California split spoon sampler) or a Standard Penetration Test (SPT) sampler with a 140 pound hammer dropping approximately 30 inches (ASTM D1586). The number of blows required to drive the samplers 18 inches was recorded (generally in 6 inch increments). Blowcounts are indicated on the boring log. The California samplers are 3.0 inches in diameter, carrying brass sample rings having inner diameters of 2.5 inches. The standard penetration samplers are 2.0 inches in diameter with an inner diameter of 1,5 inches. Undisturbed samples were removed from the sampler and placed in moisture sealed containers in order to preserve the natural soil moisture content. Bulk samples were obtained from the excavation spoils and samples were then transported to our laboratory for further observations and testing. l J Griffen Ranch SEC Avenue 54 and Madison Street F Date: 711.612004 Sorin No. 1 Job Plumber: 5444402 a a C .D 3 O � w ri Description �°, Remarks 4 Native Soils 5 31518 Dry Silty Fine SmA slat 5 .-- rey in color 1 Q 41$111 Dry Fine to Medium Sand with Traces of Silt Sm 1 7 ray in color ] 5 216!7 Dry Silty Fine Sand SM ! - - ey in color a0 31$17 Dry Silty Fine Sand SM i 1 i rey in coke 25 Firmly Packed 3/516 Clayey Silt ML 1 67 - Grey in color 34 31417 Clayey Silt ML l 69Irey in color 35 5/619 Slighdymoist Clayey Silt with Traces of Fine Sant! ML l5 79 in color 40 315113 Slightly ►hoist Clayey Silt with Trams of Fine Sand ML 4 69 in color with a Layer of Silty Fine Sand -4" - Note: The stratification lines ' resent the approximate 619117 Slightly Moist Silty Fine Sand SM 4 45 boundaries between the soil ' pes; the transition may be -Total Depth . -5U' 54 )115120 tly Moist Silty Fine Sand Slut 3 14 Groundwater not encountered Bcdroc.ik not encounterud l Sladden Engineering f Griffin R2nleh SEC Avenue 54 and Madison Street Date: 7/16/2004 Sorin No. 2 Job Number: 544-4102 � a 0 � V o ❑ C3 m Deseri don 00emarks �, o D ative Soils 5 6110/13 Finn Clayey Silt ML Grey in color 10 31416 Clayey Silt with Silty Fine Sand Layer --6- Mi b 77 icy in color is DE 51616 Dry Sandy Silt ML 3 71 CTM in color 20 GM in color 41618 Dry Silty Fine Sand SM 2 --- 25 316111 Silty Medium to Coarse Sand SM 19 [ trey in color 30 41617 Silty Fine Sand SM 1.9ey in color 35 415/6 Silty Fine Sand with Firm Sandy Sift Layer -5" SM 5 -- Grey in color " Note: The stratification lines -represent the approximate - ' iundanc s between the sail types; d0 , 315!7 Silty Fine Sand SM } la' he transition rnav betaradual. a; 45 4/5d4 "Moist Silty Fine to Medium Sand with a very Moist SM 19 - - Grey in color - Sandy and Clayey Silt Layer --6" ToW Depth = 50' - roan water encountered 50' so 31614 1 We. SagOv and Claycy Silt with Slivy Fine Sand I SM 24 26 Bedrock nor c rtcountesod Sladden Engineering r Griffin Ranch SEC Avenue 54 and Madison Street Date.- '111512004 Bering No. 3 Job Number: 544-4401 C ° o 0 Surrounding Area is Flwd _ Irrigated S 31315 Moist Silty l=ine to Medium Sand SM 113 4 17 Grey in color 14 41516 Moist Silty fine Sand SM 6 21 Grey in color is Grey in color VIA I Wet Clayey Silt Layer —10" ML 34 $4 20 2f212 Wet Clayey Silt Layer -10" with Silty Fine Sand ML 27 71 Grey in color 25 Crey in calor 3616 Moist Silty Fine to Medium Sand with a Clayey Silt SM 14 -» - layer � 4 t 30 Grey in colas 312/2005 Moist Silty Clay Layer - 16" CI 35 $$ �rrf"{• 5/719 Moist Fine to Medium Sand with Traces of Silt SP 6 10 33 - Grey in calor Nae: The stratification lines - represent the approximate 40 `': 5/8111 Moist Fine to Medium Sand with Traces of Silt SP 4 7 boundanes between the soil - types; the transition may be - sradual. 45 " 6/10116 Moist Fine to Medimun Sand with Traces of Silt SP S 8 Grey in color - Total DqA - Bedrock not encountered So 91911.7 j.Moist Fine to Medium Sand with Traces of Silt SP 9 16 Groundwater not encountered Siadden Engineering GrMn Ranch SEC Avenue 54 and Madison Street F Date: 7/1612004 Borl No. 4 Job Number: 344-4402 w e O at 4r0+ " fl U Desert ttvn ton �° Retnarks 0Native Soils 5 41719 Dry Silty l=ine Sand Sm 2 20 my in color 10 . 317/10 Damp Silty Fine Sand SM 6 25 Grey in calor w 15 Grey in calor 2!317 Wet Silty Clay and Moist Silty fine Sand ML 20 213!4 Moist and CI!Silt ML --- ---RGrey in calor 25 Ota) Depth = --20' ladrock not -,, ,ntered 'Groundwater not encountered 30 Recovered Sample Unrecovered Sunple - Standard Penetration Sample 35 40 Note: -Me straafiration lines represent the approximate - boundaries betweert the soil types; the transition may he gradual. 45 Sf� Sladden Engineering r Grif#iln Ranch SEC Avenue 54 and Madison Street Date. V4/2004 BoringNo. 5 Job Nwober- 54"402F J ° qU Description 5 gt Remarks pNative Soils 2 5 3!12(23 Dry Silty Clay CL 2 93 'rcyish Brown in valor ][} '_ in color 9111124 Dry Fine to Medium Sand with Traces of Silt SP 1 7 I5 Grey in color 14115/27 Dry Clayey Silt ML 4 90 20 color Silty FineSandLin Depth =--20' -Total - bedrock not encountered - groundwater of encomtered 25 30Recovered Sample - Unreeovercd Sample - Standard Penetration i7amoe 35 40 Note: The stratification lines represent the approximate - boundaries between the soil types; the transition may be - gradual. 45 50 Sladden Engineering Griffin Ranch SEC Avenue 54 and Madison Street Date: $!412004 Boring No. b Job Number: 544-4402 M Description r a 4 ar 0 -.R Rmwks 0 alive sails 5 I9130132 Dry Silty Pine Sand Grey in color l0 = Greyish brown in color 10/23/20 Dry Pine Sand with Traces of Silt SP l - - l5 eY in color 10110115 a the an s a Silt La -Total Depth �-1 S' Bedrock not encounered - Groundwater not encountered 20 zs 30 Recovered Sarttple - tJnecoverei Sample - Standard Penetration Sample 35 44 Nate: The stratification lines represent the approximate - boundaries between the soil types: the transition may be - gradual. 45 50 gladden Engineering r Griffin Ranch SEC Avenue 54 and Madison Weei Date: $1412004 Bonin No. 7 Job Number: 544-4402 a ° v � v3 [�} Dgyi bon cn � Remarks 0 [dative Soils 5 5110115 DrySilty Fine Sand SM fi .;rcy in color 10 61101I 9 DrySilty Fine Sand SM 22 rey in color 15 ey in oolor 9/2W24 Dry Clayey Silt ML G 91 2080111/1,5 solar tty 67 11(ircyin _ Total Depth _26r -Bedrock not encanntered 25 Recovered Sample roundwster not encountered _ - I Unrecovered Sample - Standard Penetr-a:rion Sample 34 35 Note: The stratification lines represent rile approximate - boundaries between the soil types; the transition may be - gradual. 40 45 SD l Sudden Engineering Griffin Ranch SEC Avenue 54 and Madison Street Date: 814/2004 Boring No. S Job Number: 544-4442 ?>N Cv O y .a D O A vs ts {Y} Description v3 NO Remarks 0 adve Soils 5 1013315W ]pry Silty Fine Sand SM 1 -- rty in calor 10 16t22130 Dry Silty Fine Sand SM l l 1 Grey in calor 1 S I4122126 dry Silty Fine Sand with Traces of Clay SM 4 3$ Lmyish Brown in color 20 Tow Depth ---15. -f3edrock not encountered Proundwata not encountered - Recovered Satnple t5 - _ Unrecovered Sample I - Standard Penetration Sample 30 - Now The stratification limes represent the proximate 35 boundaries between the soil types; the transition may be - gradual. 40 45 50 Sladden Engineering Crifrm Rand SEC Avenue 54 and Madison Street Date: 8/4/2044 Boring No. 9 Job Number- 544.4402 � o � U pq Desert tion a. Remarks d alive Soils 5 8114131D Slightly Moist Silty Clay and Silty Fine Sand CL 10 92 reyish Brown in color 10 Brown in calor h Brown in color 23!22150-6" Slightly Moist Fine to Medium Sand with Traces of Silt SP 2 11 15 tate Silt with ramex o a - Recovered Sample Total Depth —IS' - i not ancountered 20 [Unrecovered Sample Cimundwater tit encountered • Standard Penenmtion Sample 25 30 - Dote. The stratification lines represent the approximate - boundaries between the soil types; the trmsition may be - gradual. 35 40 45 50 Sladden Engineering 3 Griffin Ranch SEC Avenue 54 and Madison Street Uat e: 8/4114304 Barin nNo. 10 Job Number: 544-440 a o # D rn U a4 Descriaxon E°n a emarks a alive Soils 5 4111/12 Dry Fine Sand with Traces of Silt SP 2 --- in color 1p ] 117/13 pry Pitte Sand with Traces of Silt SP 1 1 TGrey in Dolor 15 11, 7110/16 Dry Fine Sand with Tmceg of Silt SP l 15 Grey in colon in calor r 10114 jDryCIayeySflt 3 - Recovered Sample Total Depth = --2U 25 Bedrock not encountered - Unrecovered Sample Groundwater not encounterod - Standard Penetration Sample 30 35 - Note: 'I'M stratif+kC8i (m lines repre mt the approximate - boundaries between the soil types; the transition may be - gradual. 40 45 50 Sladden Engineering r l Griffin Ranch SEC Avenue 54 and Madison Street Dat e. 814/2004 Boring nNoA I Job Number: 544-4402 v] C } C4 bC5Cr1 if8i1Bmarks 0 ative Sens 5 = = _ _ 518/13 Slightly Moist Fine to Medium Sand with Trace Silt SP 1 4 rey in color 10 ' ; 416/9 Slightly Moist Fine to Medium Sand with Trace Silr SP 4 - reyish Brown in color - and a Sandy Silt Layer 4" l 5 = 519/12 Moist Fine Sand with TYaces of Silt SP 2 14 rey in oolor - Recovered Sample Total Dcpth =--15' IBedrock not encountered 20 Unrmovered Sample Groundwater not encountered - I Standard Penetration Sample 25 30 35 Dote: The stratiftcatkm lines represent the approximate _ boundaries betwean the soil types; the transition may be _ gradual. 40 45 SD Sladden Engincering 44. Griffin Ranch SEC Avenue 54 and Madison Street Date.- 814/2004 Boring No.12 Job Number- 54444112 ) Ln Description rn° � o a N ,�Z Remarks 0 alive Soils 5 41W8 Moist Silty Fine Sand SM 3 my in color 10 Dark Grey in color 41314 Wet Silty Clay Layer 5" and Sandy Silt ARL I 85 15 Grey in valor 2!213 Wd Si Cla CL 1 93 Recovercd Sample otal Depth —15' edrock not encountered 20 Unrevave ed Sample Groundwater not encountered - Standard Penetration Sample 25 30 Now The stratification lines represemt the approximate boundaries between the soil types; the transition may be gradual. 35 40 45 54 Sladden Engineering r Griffin Ranch SEC Avenue 54 and Madison Street Date- 8141204 Avri NO.13 Job Number: 544-4402 � a c � 44 p O O cn U Description Remarks 0 &five Soils 5 51516 Moist Siky Fine Sand SPvS 6 26 rey in color 1t} Dark Grey in color 515110 Wel Clayey silt ML 30 $7 15 ark Grey in calor W16 Wet Silty Fine Sand with Tracer, of Clay SM -- - Recovered Sample F13 7 Tow Depth =-15' IBedrock not encountered 20 Unramvered Sample Gmundwaw=t encountered Standard Penetration Sample 25 30 Note: The stratification lines represent the approximate _ boundaries betwom the soil types; the transition may be 35 gradual. 40 45 50 Sladden Engineering l Griffin Ranch SEG Avenue 54 and Madison Street Date: 81412004 Burin Nv.14 Job Number: 544-4402 " U Description rh ZD Remarks Q alive Soils 5 W10112 Dry Silty Fine Sand with a Clayey Silt Layer -4" SM 13 — Light Greyish Brown in color 10 7/161115 Ory Silty Fine Sand SM [ --- ney in color 15 91100 19lightly Moist Silty Fine Sand SM 1 rey in ootor keoDvered Sample Total Depth —15' Bedrock not encountered Unrecovered Sample I Groundwater not encountered Standard Penetration Sample 25 30 - Note: The stratification lines represent the approximate - boundaries between the soil types; the transition may be 35 gradual. 40 45 50 Sladrlen Engineering r Griffin Ranch SEC Avenue 54 and Madison Street Date: 814/2004 Barin No.15 Job Number: 5444402 4 v c N rn V Description rn o Remarks 0 native Soils 5 51517 Slightly Moist Silly Fine Sand SM 3 13 Grey in color B L' 10 415!$ silty Fine Sand with Traces of Clay SM is 36 ight Greyish Brown in color 15 516113 Silty -Fine Sand with a Clayey Silt Layer —5" SM 4 ---Grey in color - Rewvered Sample ata] Depth —1V - Bedrock not encountered 20 Unrecovered Sample G rouadwater not encountered = Standar[! Penetration Sample 25 30 - Note.- The stratification lines represent the approximate boundaries between the soil types; the transition may be gradual. 35 40 45 54 Sladden Engineering f 3 Griffin Ranch SEC Avenue 54 and Madison Street FED,zte. 8/4/2004 Barin No -16 Job Number: 544-4402 CL a ° � N ! Description ri Remarks o NativeSoils 5 41617 Silty Fine Sand with a C3ayey Silt Layer —3" SM 10 22 Grey in color 30 3/618 Slightly Moist Silty Fine Sand with Traces of Clay SM 9 36 Grey in color 15 418113 1 Silty Fine to Medium Sand SM 2 1 25 LM in color kecavered Sample ' FundwaW - I untered 20 Unrrcoveted Sample encountered = Standard Penetration Sample 25 30 - Note: The stratification lines represent the appmximaae 35 boundaries between the soil types; The transition may be _ gradual. 44 45 5o Sladden Engineering APPENDIX S Laboratory Testing Laboratory Test Results APPENDIX B LABORATORY TESTING Representative bulk and relatively undisturbed soil samples were obtained in the field and returned to our laboratory for additional observations and testing. Laboratory testing was generally performed in two phases. The first phase consisted of testing In order to determine the compaction of the existing natural soil and the general engineering classifications of the sails underlying the site. This testing was performed in order to estimate the engineering characteristics of the soil and to serve as a basis for selecting samples for the second phase of testing. The second phase consisted of soil mechanics testing. This testing including consolidation, shear strength and expansion testing was performed in order to provide a means of developing specific design recommendations based cn the mechanical properties of the soil. CLASSIFICATION AND COMPACTION TESTING Unit Weight and Moisture CountentDeterminations: Each undisturbed sample was weighed and measured in order to determine its unit weight. A small portion of each sample was then subjected to testing in order to determine its moisture content. This was used in order to determine the dry density of the soil in its natural condition. The results of this testing are shown on the Boring Log. Mwdmurn Density-Optia►um Moisture Determirnationm Representative soil types were selected for maximum density determinations. This testing was performed in accordance with the ASPM Standard 01557-91, Test Method A- The results of this testing are presented graphically in this append [x. The maximum densities are compared to the field densities of the soil in order to determine the existing relative compaction to the soil. This is shown on the Boring Log, and is useful in estimating the strength and compressibility of the soul. Classification Testing Soil samples were selected for classification testing. This testing consists of mechanical grain size analyses and Atterberg Limits determinations. These provide information for developing classifications for the soil in accordance with the Unified Classification System. This classification system categorizes the soil into groups having similar engineering characteristics. The results of this testing are very useful in detecting variations in the soils and in selecting samples for further testing. SOIL MECHANIC'S TESTING Direct Shear Testing: One hulk sample was selvted for Direct Shear Testing. This testing measures the shear strength of the soil under various normal pressures and is used in developing parameters for foundation design and lateral design. Testing was performed using reanmpacted test specimens, which were saturated prior to testing. Testing was performed using a strain controlled test apparatus with normal pressures ranging from 800 to 2300 pounds per square foot. Expansion Testing: One bulk sample was selected for Expansion testing. Expansion testing was performed in accordance with the UBC Standard I8-2. "this testing consists of remolding 4 -inch diameter by 1 -inch thick test specimens to a moisture content and dry density corresponding to approximately 50 percent saturation. The samples are subjected to a surcharge of 144 pounds per square foot and allowed to reach equilibrium. At that point tate specimens are inundated with distilled water. The linear expansion is then measured until complete. Consolidation Testing. Four relatively undisturbed samples were selected for consolidation testing. For this testing one -inch thick test specimens are subjected to vertical loads varying from 595 psf to 11520 psf applied progressively. The consolidation at each load increment was recorded prior to placement of each subsequent load. The specimens were saturated at the 575 psf or 720 psf load increment. kL._ A Maximum DensitylOptimum Moisture ASTM D698/D 1557 Project Number- 544-4402 Projcet Narne: Trans West Housing Lab ID Number: Sample Locabon: Bulk 3 @ 0-5' Description: Silty Sand Maximum Density: 129 pd Optimum Moisture: 9.5% - NA Max Density 143 140 135 130 125 120 M 110 105 Sieve Size % Retained 314" 3/8" #4 0.0 August 3, 2004 ASTM D-1557 A Ranuner Type. Manual 5 io I Moisture Content, % Sladden Engineering 20 25 Rtvisad 1210M X I I J I <— Zero Air Voids Lines, E� sg =2.65, t I X N. -4- Lt --- -.- 1 I -4-4-4-4 L I T 4 - I 5 io I Moisture Content, % Sladden Engineering 20 25 Rtvisad 1210M r Gradation ASTM Cl 17 & C136 Project Number: 544-4402 Project Name: Trans West Housing Sample ID: Bulk 3 @ 0-5' Sieve Sieve percent Size, in Size, nun Passing I" 25.4 100.0 3/411 19.1 100.0 1/2pt 12.7 100.0 3/8" 9.53 100.0 #4 4.75 100.0 #8 2.36 100.0 #16 1.18 97.0 #30 0.60 94.0 #50 0.30 86.0 #100 0.15 75.0 #200 0.074 25.0 Gradation Sladden Engineering 100 7 T 0 80 70 60 - 54 J H HI -411t T- . - ILI L TT ti I F i I 40- F 30-- ............. 4 L --m—L -4- IL 100 -ON 10.000 1.000 0.100 0�010 011 Sieve Size, mm August 3, 2004 Revisod IUM02 Revisod IUM02 r a Gradation ASTM 0117 & C136 Project Number: 544-4402 Project Name. Ave. 54 & Madison Sample ID_ Bulk 3 210-5' Siege Sieve Percent Size, in Size, mm _ P!ELAg IN 25.4 100.0 314" 19.1 100.0 lit" 12.7 100.0 318" 9.53 100.0 44 4.75 104.0 #8 2,36 99.0 #16 1.18 91.0 #30 0.60 86.4 #50 0.30 7 LO #100 0.15 61.0 #200 0.074 25.0 August 30, 2004 1001.- --- _ . - 90. so 70 -,--- - -- 50 0 40 34 - -- - — — - 26 10 Gradation 0 IO U00 10.000 1.000 0.110 0.010 03.001 Sieve Size, mm S Iadden Engineering RBviSed 111IN02 �6- El Expansion Index ASTM D 4829/U13C 29-2 Job Number: 544-4402 Jab Name: Trans Vilest Housing, Lab 1D: Sample TD; Bulk 3 @ 0-5' Sail Description: Silty Sand Wt of 5ai.1 + Rin : 595.0 Weight of Ring: 179.0 Wt of Vliet Soil: 416.0 Percent Moisture: 1 8% Wet Density, 125.0 Diy Dcnstiy,_pqf 116.71 Saturation: 1 48.7 Expansion Rack # Date/Time 814120041 1 9:00 AM Initial. Reading 0.500 Final Reading 0.511 Expansion Index (Final - Initial) x I000 Sladden Engineering Date: 813/2004 Tech: .lake Revised i211M2 r One Dimensional Consolidation ASTM ©2435 & D5333 Job Number: 544-4.442 Job Nance: Ave. 54 & Madison Sample IU: Boring 9 @ 5' Soil Description: Sandy Silt Consohda6on August 30, 2004 Initial Dry Density, pcf: 88.0 Initial Moisture, W 10 Initial Void Ratio: 0.894 Specific Gravity: 2.57 % Change in Height vs Normal Presssure Diagram 0 $afore Saturation —ate After Saturation 0 Rebound f Hydra Consolidation .�. .. T—ice - ^- T � •—_.—�__�'__a ..� — - --T,---- 0.0 1.0 2.0 Sladden Engineering 5.0 6.0 7.0 Revised 11/24102 LN One Dimensional Consolidation ASTM D2435 & D5333 Jab Number: 544-4402 August 30, 2004 Joh Name: Ave. 54 & Madison Initial Dry Density, pcf: 99.9 Sample ID: Boring 9 @ 10' Initial MGisture, %: 2 Soil Deseription: Sand Initial Void Ratio: 0.669 Specific Gravity: 2.67 I 0 Consolidation % Change iu Height Ws Normal Pressure Diagram 0 Before Saturation --ate After 5aniration e Rebound --;—Hydro Consolidation 1.0 2.0 3.0 4.0 5.0 Sladden Engineering 6.0 7.4 Revised 1 MAIN _fes_-•-. 1.0 2.0 3.0 4.0 5.0 Sladden Engineering 6.0 7.4 Revised 1 MAIN f One Dimensional Consolidation ASTM D2435 & D5333 Joh Number: 544-4402 August 30, 2004 Joh Name: Ave. 54 & Madison Initiai Dry Density, pcf: 94.7 Sample ID: Boring 15 @ 5' Initial Moisture, %: 3 Soil Description: Sand Initial Void Ratio: 0.837 Specific Gravity: 2.67 I D -1 - _3 _4 -7 _g _9 -1n 2.0 2.5 3.0 3.5 4.0 4.5 5.0 % Change in Height vs normal Pressure Diagram --0 Before Saturation—6After Saturation � - 9 Rebound -- Hydro Consolidation Consolidation S1adden Engineering Revised 11120142 1 Consolidation S1adden Engineering Revised 11120142 IN One Dimensional Consolidation ASTM D2435 & D5333 Job Number: 5144-4402 Job Name: Ave. 54 & Madison Sample ID: Boring 15 a@ 10' Soil Description: Silty Sand -5 -6 -7 _g .9 Consolidation August 34, 2404 Initial Dry Density, pef 55.9 Initial Moisture, %- 15 Initial Void Ratio: 0.738 Specific Gravity: 2.67 % Change In Heigbt vs Normal Pressure Diagram --0 Before Saturation --a After Sat=don --G— Rebound Hydro Consolidarion 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Sladden Engineering Revised l 112t)It72 ------------ -- - . ........ . 4-:4 — --�–i -- - 1 1 _��_� Y -:7=z� I - - - -I - - _ . - I'-- ___. - • - _•. _. _ - - ____. ,. .__rte-� -a �.......�+�_..,.�. L 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Sladden Engineering Revised l 112t)It72 r E€ Expansion Index ASTM D 48291UBC 29-2 Joh Number: 544-4402 Joh Mame: Ave. 54 & Madison Lab ID: Sample ID: Soil Description: Date: 8/3012004 Tech: .Take Bulls 3 @ 0-5' - - Silty Sand Wt of Soil + Rin &_ 585.0 Weight of Bing: 179.4 Wt of Wet Soil: 406.0 Percent Moisture: 911/0 Wet Density, f 123.4 1]ensti , pef 1 112.9 % Saturation: 49.3 Expansion Rack # Date/Time 8130/2004 9:00 AM Initial Reading 0.504 Final Reading 1 4.502 Expansion Index (Final -Initial) x 1000 2 Sladden Engineering Revised I M 0102 Maximum Density/Optimum Moisture ,ASTM Db981Dt557 Project Number: 544-4402 Project Name: Ave. 54 & Madison Lab ID Number: Sample Location: Bulk 3 [cry 0-5' Description: Silty Sand Maximum Density: 119 pef Optimum Moisture: 10.5% 145 140 135 134 Sieve Size % Retained 3141! 318" #4 0.0 August 30, 2004 ASTM D-1557 A Rammer Type: Manual 110 M 100 0 Max Density j 10 I5 20 25 Moisture Content, % Sladden Engineering Revised 17103102 r Gradation ASTM C1 17 & C 136 Project. Number: 544-4402 August 30, 2004 Project Name: Ave. 54 & Madison Sample 1D: Baring 3 e@a 5' Sieve Sieve Percent Size, in Size, ram Passing 111 " 25.4 100.0 314" 19.1 100.0 112" 1.2.7 100.0 318" 9.53 100.0 #4 4.75 100.0 #8 2.36 100.0 #16 1.18 97.0 #30 0.60 79.0 #50 0.30 6&0 #100 0.15 59.0 #200 0.074 17.0 Gradation 1(30 -•-- - ---- _--,------ - ; -: - -- - 70 - — - --- --- --- . ---- — so -_....7-.- 50 --- - _ 30-- 20 d 2d 10 d , 100.000 10.004 1.000 0.100 0.010 0.001 Sieve Size, mm Sladden Engineering Revised I I M= Gradation ASTMC117&C135 Project lumber: 544-4402 ___.._ _ _._�-_��_... _._... - - --•�r�------T-- Project Name: Ave. 54 & Madison Sample ID: Boring 3 Q 10' Sieve Sieve Percent a -- Size, in Size, mm Passing 1 " 25.4 100.0 314" 13.1 100.0 112'1 12.7 100.4 318" 3.53 100.0 #4 4.75 100.0 #8 2.36 100.0 #16 1.18 100.0 #30 0.60 85.0 #50 0.30 74.0 #100 0.15 57.0 #200 0.074 21.0 100 84 70 i August 30, 2004 -di; - 0+- 100-000 Gradation 10.000 1.000 0.100 4.410 0.001 Sieve Size, mm S Iadden Engineering Revised 11120/02 60 ___.._ _ _._�-_��_... _._... - - --•�r�------T-- 13 a 4(3. 30 10 - - - -- - - - 0+- 100-000 Gradation 10.000 1.000 0.100 4.410 0.001 Sieve Size, mm S Iadden Engineering Revised 11120/02 f APPENDIX C 1997 USC Seismic Design Criteria 34 August 17, 2004 -15- project No. 544-4402 ()4-d8-571 1997 UNIFORM BUILDING CODE SEISMIC DESIGN INFORMATION The International Conference of Building Officials 1997 Uniform Building Code contains substantial revisions and additions to the earthquake engineering section in Chapter 16. Concepts contained in the updated code that will be relevant to construction of the proposed structures are summarized below. Ground shaking is expected to be the primary hazard most likely to affect the site, based upon proximity to significant faults capable of generating large earthquakes. Major fault zones considered to be most likely to create strong ground shaking at the site are listed below. Fault Zone Approximate Distance From Site Fault Type (1997 UBC) San Andreas 9.9 km A Sara Jacinto 32.1 krn A Based on our field observations and understanding of local geologic conditions, the soil profile type judged applicable to this site is 5D, generally described as stiff or dense soil. The site is located within UBC Seismic Zone 4. The fallowing table presents additional coefficients and factors relevant to seismic mitigation for new construction upon adoption of the 1997 code. Sladden Engineering Near -Source Near -Source Seismic Seismic Seismic Acceleration Velocity Coefficient Coefficient Source Factor, Na Factor, N,, C, C, San Andreas 1.0 1.2 0.44Nz 0.64N, San Jacinto 1.0 1.0 0.44Nm 0.64Nr Sladden Engineering Whitewater River Region WQMP Tract Map No. 36744 Appendix F Site Design and Treatment Control BMP Sizing Calculations and Design Details Riverside County - Whitewater River Region Water Quality Management Plan Exhibit C Worksheet 1 Design Procedure for BMP Design Volume Designer: DVD Company: MSA Consulting, Inc. - Date: June 25, 2014 Project; Tentative Tract Map No. 38744 - Griffin Lake Estates Drainage Area: A 1. Determine the Tributary Area to the BMP (Atnb) AUSe 1.38 acres 1 2. Determine the impervious area ratio (i) a. Determine the impervious area within Atrm imp 0.95 acres (2) b. Calculate I = A, ,Wkb = (2j1(1) i= 0,69 3 3. Determine Runoff Coefficient C C=0.858'i3-D.78'i2+0.774'i+0.04 C= 0.48 (4) C=0.858'(3)3-0.78*(3)2+0.774"(3)+0.04 4. Determine Unit Storage Volume (V,) V,,= 0.40'C=0.40"(4) V.= 0.19 acre-inlacre 5 5, Determine Design Storage Volume Vamp = V„' Amb = (5)'(1) VBMP= 0.27 acre -in (8) v9Mp = (6Y12 vamp= D. 02 acre -ft (T) VBMP = (7)'43560 VBMP= 958 cubic ft s Notes: Riverside County - Whitewater River Region Water Quality Management Plan Exhibit C Worksheet 1 Design Procedure for BMP Design Volume Designer: DVD Company: MSA Consu#ing, Inc. _ .. Date: June 25, 2014 Project: Tentative Tract Map No. 36744 - Griffin Lake Estates Drainage Area: B 1. Determine the Tributary Area to the BMP (Abib) k.b= 38.41 acres 1 2. Determine the impervious area ratio (i) a. Determine the impervious area within AtIb Aimp 21.93 acres (2) b. Calculate I = AN,p Atlb = (2)1(1) i= 0.57 3 3. Determine Runoff Coefficient C C=0.858*i3-0.78'i'+C774'i+0.04 C= 0.39 (4) C=0.858'(3)3-0.78'(3} +0.774'(3)+0.04 4. Determine Unit Storage Volume (V„) V„=0.40*C=0.40"(4) VI= 0.15 acre-in/acre 5 5. Determine Design Storage Volume VeMP = V. * Aye = (5)*(1) VeMP= 5.95 acre -in (6) Vamp = (6)112 VeMP= 0.30 acre -ft (7) VeMP = (7)*43560 VeMP= 24,602 cubic ft $ Notes: Whitewater River Region WOMP Tract Map No. 367" Appendix G AGREEMENTS — CC&RS, COVENANT AND AGREEMENTS AND/OR OTHER MECHANISMS FOR ENSURING ONGOING OPERATION, MAINTENANCE, FUNDING AND TRANSFER OF REQUIREMENTS FOR THIS PROJECT -SPECIFIC WQMP (TO BE PROVIDED) r CLTA Preliminary Report Form (Rev. 11/06) *� Fmt Amerk n Title Order Number: 0625-4782044 Page Number: 1 First American Title Company 323 Court Street San Bernardino, CA 92401 Mark Majer MDM Investments Group 23 Corporate Plaza Suite 150 Newport Beach, CA 92660 Phone: (949)629-2580 Fax: (949)419-0920 Customer Reference: Order Number: Griffin Ranch Investors Lp 0625-4782044 (gp) Title Officer: Josh Guzman/ Porscha Peterson Phone: (951)787-1762 Fax No.: (866)292-6890 E -Mail: RVTitle@firstam.com Property: 81345 Avenue 54 La Quinta, CA 92253 PRELIMINARY REPORT In response to the above referenced application for a policy of title insurance, this company hereby reports that It Is prepared to Issue, or cause to be Issued, as of the date hereof, a Policy or Policies of Title Insurance describing the land and the estate or interest therein hereinafter set forth, insuring against loss which may be sustained by reason of any defect, lien or encumbrance not shown or referred to as an Exception below or not excluded from coverage pursuant to the printed Schedules, Conditions and 5tlpulations of said Policy forms. The printed Exceptions and Exclusions from the coverage and Limitations on Covered Risks of said policy or policies are set forth in Exhibit A attached. The policy to be hmied may contain avr arb&abbn darrse, Wtm7 the Amaunt oflnsuraime rs ks s than that set firth in the arb&aWn dat w, all arboatt- matters shao+l be arb&ated at t54e opbm of effser Ate Conpany ar the lfm#ed as the exdusYve nwwdy ofthe pardL,s Limitations on Covered Risks applicable to the CLTA and ALTA Homeowners Policies of Title Insurance which establish a Deductible Amount and a Maximum Dollar Limit of Liability far certain coverages are also set forth in Exhibit A. Copies of the policy forms should be read. They are available frorn the office which issued this report. Please read the exceptions shown or referred to below and the exceptions and exclusions set forth In Exhibit A of this report carefully. The exceptions and exclusions are meant to provide you with notice of matters which are not covered under the terms of the title insurance policy and should be carefully considered. It is important to note that this preliminary report is not a written representation as to the condition of title and may not list all liens„ defects, and encumbrances affecting We to the land. This report (and any supplements or amendments hereto) is issued solely for the purpose of facilitating the issuance of a policy of tide insurance and no liability is assumed hereby. If It is desired that liability be assumed prior to the Issuance of a policy of title insurance, a Binder or Commitment should be requested. first American Title Page 1of13 Order Number: 0623-4782044 Page Number: 2 Dated as of December 01, 2014 at 7:30 A.M. The form of Policy of title insurance contemplated by this report is: To Be Determined A specific request should be made if another form or additional coverage is desired. Title to said estate or interest at the date hereof is vested in: GRIFFIN RANCH INVESTORS, LP, A DELAWARE LIMITED PARTNERSHIP The estate or Interest in the land hereinafter described or referred to covered by this Report is: A Fee. The Land referred to herein is described as follows: (See attached Legal Description) At the date hereof exceptions to coverage in addition to the printed Exceptions and Exclusions in said policy form would be as follows: 1, General and special taxes and assessments for the fiscal year 2014-2015. First Installment: $47,195.61, OPEN Penalty: $0.00 Second Installment: $47,195.61, OPEN Penalty: $0.00 Tax Rate Area: 020-059 A. P. No.: 767-320-013-5 2. The lien of supplemental taxes, if any, assessed pursuant to Chapter 3.5 commencing with Section 75 of the California Revenue and Taxation Code. 3. An easement for a water pipe line and incidental purposes, recorded April 11, 1949 as Book 1067, Page 26 of Official Records. In Favor of: United States of America Affects: As described therein 4. An easement for both pole lines, conduits and incidental purposes, recorded June 4, 1956 as Book 1921, Page 381 of Official Records. In Favor of: Imperial Irrigation District Affects: As described therein RrstAmerican Title Page 2of13 Order Number: 0$25,4782044 Page Number: 3 5. Any easement for public highway over the North 30 feet of said land created by Minute Order of Supervisors of Riverside County, made on January 9, 1901 and recorded April 17, 1959 as Instrument No. 32692, in Book 2454 Page 65 of Official Records of Riverside County, California. 6. The terms and provisions contained In the document entitled Right of Way Agreement, executed by and between The Mery Griffin living Trust, U/DJT dated June 20, 1986 (as amended) and The City of La Quinta, a municipal corporation, recorded January 20, 2005, as Instrument No. 2005- 0055025 of Official Records. 7. The terms and provisions contained in the document entitled "Water Production Metering Agreement" recorded August 28, 2013 as Instrument No. 13-423143 of Official Records. 8. Rights of the public in and to that portion of the land lying within any Road, Street, Alley or Highway. 9. Water rights, claims or title to water, whether or not shown by the public records. 10. Any facts, rights, interests or claims which would be disclosed by a correct ALTAJACSM survey. 11. Rights of parties in possession. Prior to the issuance of any policy of title insurance, the Company will require: 12. An ALTAJACSM survey of recent date which complies with the current minimum standard detail requirements for ALTAJACSM land title surveys. 13. With respect to Griffin Ranch Investors, LP, a limited partnership: a. That a certified copy of the application for registration, foreign limited partnership (form LP -5) and any amendments thereto (form LP -6) be recorded in the public records; b. A full copy of the partnership agreement and any amendments; c. Satisfactory evidence of the consent of a majority in interest of the limited partners to the contemplated transaction; d. Other requirements which the Company may impose following its review of the material required herein and other information which the Company may require. FirstAmerican Title Page 3 of 13 order Number: 0625-4782044 Page Number: 4 INFORMATIONAL NOTES Note: The policy to be issued may contain an arbitration clause. When the Amount of Insurance Is less than the certain dollar amount set forth in any applicable arbitration clause, all arbitrable matters shall be arbitrated at the option of either the Company or the Insured as the exdusive remedy of the parties. If you desire to review the terms of the policy, including any arbitration clause that may be included, contact the office that issued this Commitment or Report to obtain a sample of the policy jacket for the policy that is to be issued in connection with your transaction. According to the latest available equalized assessment roll in the office of the county tax assessor, there is located on the land a(n) Commercial Structure known as 81345 Avenue 54, La Qui nta, CA. 2. According to the public records, there has been no conveyance of the land within a period of twenty four months prior to the date of this report, except as follows: A document recorded June 04, 2013 as Instrument No. 13-266693 of Official Records . From: JP Morgan Chase Bank, N.A., successor trustee of the Mery Griffin Living Trust UjT/D 6- 20-86 To: Griffin Ranch Investors, LP, a Delaware limited partnership 3. We find no -open deeds of trust. Escrow please confirm before dosing. The map attached, if any, may or may not be a survey of the land depicted hereon. First American expressly disclaims any liability for loss or damage which may result from reliance on this map except to the extent coverage for such loss or damage is expressly provided by the terms and provisions of the title insurance policy, if any, to which this map is attached. Rrst'American Tine Page 4of13 r Order Nurnber: 0635-47820" Page Number: 5 LEGAL DESCRIPTION Real property in the City of La Quinta, County of Riverside, State of California, described as follows: THE NORTHEAST QUARTER OF THE NORTHWEST QUARTER OF SECTION 15, TOWNSHIP 6 SOUTH, RANGE 7 EAST, SAN BERNARDINO BASE AND MERIDIAN, AS PER UNITED STATES GOVERNMENT SURVEY. EXCEPTING THEREFROM 49% OF ALL OIL, GAS AND MINERAL RIGHTS AS RESERVED BY GOLDEN STATE VENTURES INC., A DELAWARE CORPORATION, IN DEED RECORDED DECEMBER 28TH 1973 AS INSTRUMENT NO. 167188. ALSO EXCEPTING THEREFROM 49% OF ALL OIL, GAS AND MINERAL RIGHTS AS RESERVED BY 1. ANTHONY MORAN AND VIRGINIA MORAN IN DEED RECORDED DECEMBER 18, 1975 AS INSTRUMENT NO. 157642. APN: 767-320-013-5 First American Title Page 5 of 13 W t+ ant � � N s F~+ s Order Number: 0625-47820" Page Number: 6 FirstAnwican Title Page 6 of 13 IIIIIIIIIIIIIII FirstAnwican Title Page 6 of 13 3 Order Number: 0625-47$2044 Page Number: 7 Nd 77CE Section 12413.1 of the California Insurance Code, effective January 1, 1990, requires that any title insurance company, underwritten title company, or controlled escrow company handling funds in an escrow or sub -escrow capacity, wait a specified number of days after depositing funds, before recording any documents in connection with the transaction or disbursing funds. This statute allows for funds deposited by wire transfer to be disbursed the same day as deposit, In the case of cashier's checks or certified checks, funds may be disbursed the next day after deposit. In order to avoid unnecessary delays of three to seven days, or more, please use wire transfer, cashier's checks, or certified checks whenever possible. Fist American Trtfe Page 7 of 13 r Order Number: 0625-4782044 Page Number: 8 WIRE INSTRUCTIONS for First American Title Company, Demand/Draft Sub -Escrow Deposits Riverside County, California PAYABLE TO: First American Title Company BANK: First American Trust, FSB ADDRESS: 5 First American Way, Santa Ana, CA 92707 ACCOUNT NO: 3004460000 ��i1�1r1wl►lHi!1��uI:��►�►�ZT�►�� PLEASE REFERENCE THE FOLLOWING: PROPERTY: 81345 Avenue 54, La Quinta, CA 92253 FILE NUMBER: 0625-4782044 (gp) ATTENTION: Josh Guzman/ Porscha Peterson PLEASE USE THE ABOVE INFORMATION WHEN WIRING FUNDS TO First American Title Company. FUNDS MUST BE WIRED FROM A BANK WITHIN THE UNITED STATES. PLEASE NOTIFY Josh Guzman/ Porscha Peterson AT (951)787- 1762 OR RVTitle@firstam.com WHEN YOU HAVE TRANSMITTED YOUR WIRE. IF YOUR FUNDS ARE BEING WIRED FROM A NON -U.S. BANK, ADDITIONAL CHARGES MAY APPLY. PLEASE CONTACT YOUR ESCROW OFFICEPJCLOSER FOR INTERNATIQNAL WIRING INSTRUCTIONS. AN ACH TRANSFER CANNOT BE ACCEPTED FOR CLOSING, BECAUSE TT I5 NOT THE SAME AS A WIRE AND REQUIRES ADDITIONAL TIME FOR CLEARANCE. FIRST AMERICAN TRUST CONTACT INFO: Banking Services 1-877-600-9473 ALL WIRES WILL BE RETURNED IF THE FILE NUMBER AND/OR PROPERTY REFERENCE ARE NOT INCLUDED With cyber crimes an the increase, it is important to be ever vigilant. If you receive an e-mail or any other communication that appears to be generated from a First American employee that contains new, revised or altered bank wire instructions, consider it suspect and call our office at a number you trust. Our bank wire instructions seldom change. First American Title Page 8 of 13 r Order Number: 0525-478204.0 Page Number: 9 EXHIBIT A LIST OF PRINTED EXCEPTIONS AND EXCLUSIONS (BY POLICY TYPE) CLTA/ALTA HOMEOWNER'S POLICY OF TITLE INSURANCE (02-03-10) EXCLUSIONS In addition to the Exceptions in Schedule B, You are not insured against loss, costs, attomeys' fees, and expenses resulting from: 1. Governmental police power, and the existence or violation of those portions of any law or government regulation concerning: (a) building; (d) improvements on the Land; (b) zoning; (e) land division; and (c) land use; (f) environmental protection. This Exclusion does not limit the coverage described in Covered Risk $.a., 14, 15, 16, 18, 19, 20, 23 or 27. 2. The failure of Your existing structures, or any part of them, to be constructed in accordance with applicable building codes. This Exclusion does not 3Imtt the coverage described in Covered Risk 14 or 15. 3. The right to take the Land by condemning it. This Exclusion does not limit the coverage described in Covered Risk 17. 4. Risks: (a) that are created, allowed, or agreed to by You, whether or not they are recorded in the Public Records; (b) that are Known to You at the Policy Date, but not to Us, unless they are recorded In the Public Records at the Policy date; (c) that result in no loss to You; or (d) that first occur after the Policy Date - this does not limit the coverage described in Covered Risk 7, S.e., 25, 26, 27 or 29. 5. Failure to pay value for Your Title. 6. Lack of a right: (a) to any land outside the area specifically described and referred to in paragraph 3 of Schedule A; and (b) in skreets, alleys, or waterways that touch the Land. This Exclusion does not limit the coverage described in Covered Risk II or 21. 7. The transfer of the Tale to You is invalid as a preferential transfer or as a fraudulent transfer or conveyance under federal bankruptcy, state insolvency, or similar creciltors' rights laws. LIMITATIONS ON COHERED RISKS Your Insurance for the following Covered Risks is limited on the Owner's Coverage Statement as follows: For Covered Risk 16, 18, 19, and 21 Your Deductible Amount and Our Maximum Dollar Limit of Liability shown in Schedule A. Your Deductible Amoun Covered Risk 16: 1% of Policy Amount or $2,500.00 (whichever is less) $10,000.00 Covered Risk 18: 1% of Policy Amount or $5,000.00 (whichever is less) $25,000.00 Covered Risk 19: 1% of Policy Amount or $5,000.00 (whichever is less) $25,000.00 Covered Risk 21: 1% of Policy Amount or $2,500.00 (whichever is less) $5,000.00 ALTA RESIDENTIAL TITLE INSURANCE POLICY (6-1-97) EXCLUSIONS In addition to the Exceptions in Schedule B, you are not insured against loss, costs, attomeK fees, and expenses resulting from: 1. Governmental police power, and the existence or violation of any law or government regulation. This includes building and zoning ordinances and also laws and regulations concerning: (a) and use (b) Improvements on the land (c) and division (d) environmental protection This exdusion does not apply to violations or the enforoement of these matters which appear in the public records at Policy Date. This exclusion does not limit the zoning coverage described in Items 12 and 13 of Coveredrte rusks. 2, The right to take the land by condemning it„ unless. First American TIde Page 9 of 13 Order Humber: 0625-4782044 Page Humber: 10 (a) a notice of exercising the right appears in the public records on the Policy Date (b) the taking happened prior to the Policy bate and is binding on you if you bought the land without knowing of the taking 3. Title Risks: (a) that are created, allowed, or agreed to by you (b) that are known to you, but not to us, on the Policy Date -- unless they appeared in the public records (c) that result in no loss to you (d) that first affect your title after the Policy Date -- this does not limit the labor and material lien coverage in Item 8 of Covered Title Risks 4. Failure to pay value for your title. 5. Lack of a right: (a) to any land outside the area specifically described and referred to in Item 3 of Schedule A OR (b) in streets, alleys, or waterways that touch your land This exclusion does not limit the access coverage in Item 5 of Covered Title Risks. 2006 ALTA LOAN POLICY (06-17-06) EXCLUSIONS FROM COVERAGE The following matters are expressly excluded from the coverage of this policy, and the Company will not pay loss or damage, costs, attorneys' fees, or expenses that arise by reason of: 1. (a) Any law, ordinance, permit, or governmental regulation (including Horse relating to building and zoning) restricting, regulating, prohibiting, or relating to (i) the occupancy, use, or enjoyment of the Land; (ii) the character, dimensions, or location of arty improvement erected on the Land; (iii) the subdivision of land; or (iv) environmental protection; or the effect of any violation of these laws, ordinances, or governmental regulations. This Excfuslon 1(a) does not modify or limit the coverage provided under Covered Risk 5. (b) Any governmental police power. This Exclusion 1(b) does not modify or limit the coverage provided under Covered Risk C. 2. Rights of eminent domain. This Exclusion does not modify or limit the coverage provided under Covered Risk 7 or B. 3. Defects, liens, encumbrances, adverse claims, or other matters (a) created, suffered, assumed, or agreed to by the Insured Claimant; (b) not Known to the Company, not recorded in the Public Records at Date of Policy, but Known to the Insured Claimant and not disclosed in writing to the Company by the Insured Claimant prior to the date the Insured Claimant became an Insured under this policy; (c) resulting in no loss or damage to the Insured Claimant; (d) attaching or created subsequent to Date of Policy (however, this does not modify or limit the coverage provided under Covered Risk 11, 13, or 14); or (e) resulting in loss or damage that would not have been sustained if the Insured Claimant had paid value for the Insured Mortgage. 4. Unenforceability of the lien of the Insured Mortgage because of the Inability or failure of an Insured to comply with applicable doing - business laws of the state where the Land is situated. 5. Invalidity or unenforceability in whole of in part of the lien of the Insured Mortgage that arises out of the transaction evidenced by the Insured Mortgage and is based upon usury or any consumer credit protection or truth -in -lending law. 6. Any claim, by reason of the operation of federal bankruptcy, state insolvency, or similar creditors' rights laws, that the transaction creating the lien of the Insured Mortgage, Is (a) a fraudulent conveyance or fraudulent transfer, or (b) a preferential transfer for any reason not stated In Covered Risk 13(b) of this policy. 7. Any lien on the Title for real estate taxes or assessments imposed by governmental authority and created or attaching between Date of Policy and the date of recording of the Insured Mortgage in the Public Records. This Exclusion does not modify or limit the coverage provided under Covered Risk 11(b). The above policy form may be issued to afford either Standard Coverage or 6ctended Coverage. In addition to the above Exclusions from Coverage, the Exceptions from Coverage in a Standard Coverage policy will also include the following Exceptions from Coverage: EXCEPTIONS FROM COVERAGE This policy does not insure against loss or damage (and the Company will not pay costs, attomeys' fees or expenses) that arise by reason of: 1. (a) Taxes or assessments that are not shown as existing liens by the records of any taxing authority that levies taxes or assessments on real property or by the Public Records; (b) proceedings by a public agency that may result in taxes or assessments, or notices of such proceedings, whether or not shown by the records of such agency or by the Public Records. 2. Any facts, rights, interests, or claims that are not shown by the Public Records but that could be ascertained by an RrstAmedmn Title Page 10 of 13 Order Number: 0625-4782044 Page Number: 11 inspection of the Land or that may be asserted by persons in possession of the Land. ` 3. Easements, liens or encumbrances, or claims thereof, not shown by the Public Records. 4. Any encroachment, encumbrance, violation, variation, or adverse circumstance affecting the Tide that would be disclosed by an accurate and complete land survey of the Land and not shown by the Public Records. 5. (a) Unpatented mining claims; (b) reservations or exceptions in patents or in Acts authorizing the issuance thereof; (G) water rights, claims or title to water, whether or not the matters excepted under (a), (b), or (c) are shown by the Public Records. b. Any lien or right to a lien for services, labor or material not shown by the public records. 2006 ALTA OWNER'S POLICY (06-17-06) EXCLUSIONS FROM COVERAGE The following matters are expressly excluded from the coverage of this policy, and the Company will not pay loss or damage, costs, attorneys' fees, or expenses that arise by reason of: 1. (a) Any law, ordinance, permit, or governmental regulation (including those relating to building and zoning) restricting, regulating, prohibiting, or relating to (i) the occupancy, use, or enjoyment of the Land; (ii) the character, dimensions, or location of any improvement erected on the land; (ili) the subdivision of land; or (iv) environmental protection; or the effect of arty violation of these laws, ordinances, or governmental regulations. This Exclusion 1(a) does not modify or limit the coverage provided under Covered Risk 5. (b) Any governmental police power. This Exclusion 1(b) does not modify or limit the coverage provided under Covered Risk 6. 2. Rights of eminent domain. This Exclusion does not modify or limit the coverage provided under Covered Risk 7 or $. 3. Defects, liens, encumbrances, adverse claims, or other matters (a) created, suffered, assumed, or agreed to by the Insured Claimant; (b) not Known to the Company, not recorded In the Public Records at Date of Policy, but Known to the Insured Clalmant and not disclosed in writing to the Company by the Insured Claimant prior to the date the Insured Claimant became an Insured under this policy; (c) resulting in no loss or damage to the Insured Claimant; (d) attaching or created subsequent to Date of Policy (however, this does not modify or limit the coverage provided under Covered Risk 9 or 10); or (e) resulting in loss or damage that would not have been sustained if the Insured Claimant had paid value for the Title. 4. Any claim, by reason of the operation of federal bankruptcy, state insolvency, or similar creditors! rights laws, that the transaction vesting the Tale as shown in Schedule A, is (a) a fraudulent conveyance or fraudulent transfer, or (b) a preferential transfer for any reason not stated In Covered Risk 9 of this policy. S. Any lien on the Title for real estate taxes or assessments imposed by govemmerrtal authority and created or attaching between Date of Policy and the date of recording ofthe deed or ather instrument of transfer in the Public Records that vests Title as shown in Schedule A. The above policy form may be issued to afford either Standard Coverage or Extended Coverage. In addition to the above Exclusions from Coverage, the Exceptions from Coverage in a Standard Coverage policy will also include the following Exceptions from Coverage: EXCEPTIONS FROM COVERAGE This policy does not insure against loss ar damage (and the Company will not pay costs, attorneys' fees or expenses) that arise by reason of: 1. (a) Taxes or assessments that are not shown as existing liens by the records of any taxing authority that levies taxes or assessments on real property or by the Public Records; (b) proceedings by a public agency that may result In taxes or assessments, or notices of such proceedings, whether or not shown by the records of such agency or by the Public Records. 2. Any Facts, rights, interests, or claims that are not shown by the Public Records but that could be ascertained by an inspection of the Land or that may be asserted by persons In possession of the land. 3. Easements, liens or encumbrances, or claims thereof, not shown by the Public Records. 4. Any encroachment, encumbrance, violation, variation, or adverse circumstance affecting the Title that would be disclosed by an accurate and complete land survey of the Land and not shown by the Public Records. 5. (a) Unpatented mining daims; (b) reservations or exceptions in patents or In Acts authorizing the Issuance thereof; (c) water rights, claims or title to water, whether or not the matters excepted under (a), (b), or (c) are shown by the Public Records. G. Any lien or right to a lien for services, labor or material not shown by the public records. FirstArnerican TWO Page 11 of 13 Order Number: 0625-4782044 Page Number: 12 ALTA EXPANDED COVERAGE RESIDENTIAL LOAN POLICY (07-26-10) EXCLUSIONS FROM COVERAGE The following matters are expressly excluded from the coverage of this policy, and the Company will not pay loss or damage, costs, attorneys' fees, or expenses that arise by reason of: 1. (a) Any law, ordinance, permit, or governmental regulation (including those relating to building and zoning) restricting, regulating, prohibiting, or relating to (i) the occupancy, use, or enjoyment of the Land; (ii) the character, dimensions, or location of any improvement erected on the Land; (iii) the subdivision or land; or (iv) environmental protection; or the effect of any violation of these laws, ordinances, or governmental regulations. This Exclusion 1(a) does not modify or limit the coverage provided under Covered Risk 5, 6, 13(c), 13(d), 14 or 16. (b) Any governmental police power. This Exclusion 1(b) does not modify or limit the coverage provided under Covered Risk 5, 6.13(c), 13(d), 14 or 16. 2, Rights of eminent domain. This Exclusion does not modify or limit the coverage provided under Covered Risk 7 or 8. 3. Defects, liens, encumbrances, adverse claims, or other matters (a) created, suffered, assumed, or agreed to by the Insured Claimant; (b) not Known to the Company, not recorded in the Public Records at Date of Policy, but Known to the Insured Claimant and not disclosed in writing to the Company by the Insured Claimant prior to the date the Insured Claimant became an Insured under this policy; (c) resulting in rro loss or damage to the Insured Claimant; (d) attaching or created subsequent to date of Policy (however, this does not modify or limit the coverage provided under Covered Risk 11, 16, 17, 18, 19, 20, 21, 22, 23, 24, 27 or 28); or (e) resulting in loss or damage that would not have been sustained if the Insured Claimant had paid value for the Insured Mortgage. 4. Unenforceability of the kn of the Insured Mortgage because of the inability or failure of an Insured to comply with applicable doing - business laws of the state where the Land is situated. 5, Invalidity or unenforceability in whole or in part of the lien of the Insured Mortgage that arises out of the transaction evidenced by the Insured Mortgage and is based upon usury or any consumer credit protection or truth -in -lending law. This Exclusion does not modify or limit the coverage provided in Covered Risk 26. t}. Any claim of invalidity, unenforceability or lack of priority of the lien of the Insured Mortgage as to Advances or modifications made after the Insured has Knowledge that the vestee shown In Schedule A is no longer the owner of the estate or interest covered by this policy. This Exclusion does not modify or limit the coverage provided in Covered Risk 11. 7. Any lien on the Title for real estate taxes or assessments imposed by governmental authority and created or attaching subsequent to bate of Policy. This Exclusion Claes not modify or limit the coverage provided in Covered Risk 11(b) or 25. 8, The failure of the residential structure, or arty portion of it, to have been constructed before, on or after Date of Policy in accordance with applicable building codes. This Exclusion does not modify or limit the coverage provided in Covered Risk 5 or 6. 9. Any claim, by reason of the operation of federal bankruptcy, state insolvency, or similar creditors' rights laws, that the transaction creating the lien of the Insured Mortgage, is (a) a fraudulent conveyance or fraudulent transfer, or (b) a preferential transfer for any reason not stated in Covered Risk 27(b) of this policy. First American Title Page 12 of 13 f Order Number: 0623-4782044 Page Number: 13 Fir stAma icm Tile "acy Llift milwo We Are Committed to Safeguarding Customer Information In order to better serve your needs now and in the future, we may ask you to provide us with certain Inforwadim. We understand chat you may be concerned abort what we will do with such information - particularly any personal or financial information. We agree that you have a right to Mow how we will utilize the personal information you provide to us. Therefore, together with our subOdiarles we have adopted this Privacy Policy to govern the use and handing of your personal information. Applicability This Privacy Policy governs our use of the information that you provide to us. It dues not gwem the manner In wNrh we may use information we have obtained from any other source, such as Infornriatlon obtained from a pudic record or from another person or entity. First Amercan has also adopted broader guidelines that govern our use of personal information regardless of Its Source. First American calls these guidelines its Fair Information Values. Types of Information Depending upon which of our seri es you are utilizing, the types of nonpublic personal Information that we may called include: • Information we receive from you on applications, forms and in other communications to us, whether in wrldrmg, in person, by telephone or any other means; Infarction about your transactions with us, our aRlllated companies, or others; and • Information we receive from a consumer reporting agency. Ise of Infoln NOR We request informatlon from you for our own legitimate buskuns purposes and riot for the benefit of any nonafitlated party. Therefore, we will not release your irfarnnabon to nwaffillated parties except: (1) as necessary far us to provide the product or service you have requested of us; or (2) as permitted by law. We may, however, store such Mrmation indefinitely, including the period after which any customer relationship has ceased. Such infgrma un may be used for any internal purpose, such as quality C4ntriA efforts or customer analysis- We may also provide all a the types of nonpublic personal IniornnAlon listed above to one or more of our afflllated companies. Such affiliated companles include (Inandal service providers, such as title Insurers, property and casualty insurers, and trust and investment advisory companies, or companies involved in real estate services, such as appraisal companies, home warranty companies and escrow companies. Furthermore, we may also provide all the information we collect, as described above, to companies that perform marketing services on our behalf, on behalf of our affiliated companies or to other financial institutions with whom we or our affiliated companies have joint marketing agreerneft. Farmer Customers Even if you are no longer our customer, our Privacy Polity will continue to apply to you. Co fidentfality and Sec urfty We will use our best efforts W ensure that no unauthorised parties have access to any of your Information. We restrict access to nonpublic personal irfam mkk)n about you to those Individuals and entities who need to know that information to provide products ix writes to you. We will nue our best efforts to train and oversee our employees and agents to ensure that your idornation will be handled responsibly and In aocoNance with this Privacy Policy and First American's Fair Inforniatton Values. We currently maintain physical, electronic, and procedural safeguards that comply with federal regulations to guard your nonpublic personal information. Information Obtained Throuph Our Web Sebe First American Financial corporation is sensitive to privacy issues on the Internet We believe It is imponarn you know how vee treat the information about you we receive on the Internet. In general, you can visit First American or its afflllates' Web sties on the World Wide Web without telling us acro you are or revealing any information about yourself. Our Web savers collect the domain names, not the e-mail addresses, of visitors. This information Is aggregated to measure the number of visits, average time spent on the site, pages viewed and similar information. First American uses this information to measure the use of our site and to develop Ideas to improve the content of our site. There are times, however, when we may need Information from you, such as your name and email address. When information Is needed, we will use our best efforts to let you know at the time of collection how we will use the personal information. usually, the personal information we called Is used only by us to respond to your inquiry, process an order or allow you to access specific accauntf prone Information. If you choose to share any personal Information with rs, we will only use It In accordance with the policies outlined above. Brninem Relationships Fist American Financal Corporation's Sipe and its affiliates' sites may contain links to other Web sf s. while ft try to link only to $ites that share our high standards and respect For privacy, we are not responsible for the mmtent or die privacy pmdkes employed by other sites. Coolies some of First American's Web sites rosy make use of "nnolue" technology to measure site activity and to customize information to your personal tastes. A cookie is an element of data that a Web site can send to your browser, which may then store the eootue on your hard dr ve. F,Wrn.mm uses stored cookies. The goal of this technobgy is to better serve you when visaing our site, save you time when you are here and to provide you with a more meaningful and productive Web site experience. Fair iaformirdon values Fairness We CxWder consumer expectations about their privacy In all our businesses. We only offer products and services that assure a favorable balance lutween consumer benefits and consumer Public Recond We believe that an open pudic record creates sbgNicant value for society, enhances consumer choice and trebles consumer opportunity. We actively support an open public retard and emphaske its importance and contribution to our economy. Use We behave we should behave responsibly when we use information about a consumer in our business. We wil obey the laws governing the collection, use and dissemination of data. Ar:euracy We will take reasonable steps to help assure the accuracy of the data we collect, use and disseminate. Where possible, we will take reasonable steps to correct Inaccurate Information. When, as with the pudic record, we cannot direct Inaccurate hfamatim, we will take ail reasonable steps tG assist consumers in identifying the source of the erroneous data so that the consumer can secure the required corrections. Education We endeavor m educate the users of our products and services, our employees and others in our industry about the importance of consumer privacy. We will instruct our employees on our fair Information values and on the responsible collection and use of data. We will encourage others in our industry to collect and use Informatlar In a responsible manner. Security We will malntaln appropriate Mitles arid systems to protect against unauthoraed access to and corruption of the data we maintain. Form 50 -PRIVACY (4/1110) Page I of 1 Privacy Information (2041-2010 FirstAmerican Financial Corporation) First American Title Page 13 of 13 Whitewater River Region WOMP Tract Map No. 36744 Appendix H PHASE I ENVIRONMENTAL SITE ASSESSMENT REPORT OF PHASE II ENVIRONMENTAL SITE ASSESSMENT (NOTA VAILABLE) Whitewater River Region WQMP Tract Map No. 36744 Appendix I PROJECT -SPECIFIC WQMP SUMMARY ❑ATA FORM f Project -Specific WQMP Summary Data Form Applicant Infonnation Name and Title Mark Majer Company Griffin Ranch Investors, LP Phone (949) 629-2580 Email I To Be Provided Project Information Project Name (as shown on project appllcabordproject-specific WQMP) Tract Map No. 35744 Street Address South of Avenue 54 and east of Madison Street Nearest Cross Streets Avenue 54 Municipality (City or Unincorporated County) City of La Quinta Zip Code 92253 Tract Number(s) and/or Assessor Parcel Number($) Tract Map No. 35744 Other (other information to help identify location of project) The Thomas Guide: page 5530, grid D3 (2007 Riverside County Edition) Watershed I Whitewater River 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% 5F hillside residence; impervious area z 10,000 sq. ft.; Slope z 10% & erosive soils Commercial or Industrial z 100,000 sq. ft. Automotive repair shop Retail Gasoline Outlet disturbing } 5,000 sq. ft. Restaurant disturbing > 5,000 sq. ft. x Home subdivision z 10 housing units Parking lot z 5,000 sq ft. or z 25 parking spaces Date Project -Specific VMMP Submitted June 27, 2014 Size of Project Area [nearest a.1 acre] Approx. 39.79 acres Project Area managed with Site Design or Low Impact Development (LID) BMPs [nearest 0.1 acre] NIA Is the project subject to onsite retention by Ordinance or policy? Yes Are Treatment Control BMPs required? No Name of the entity will Implement, operate, and maintain the post -construction BMPs Griffin Ranch Investors, LP or future Home Owner's Association Contact Name Mark Maier Street or Mailing Address 23 Corporate Plaza, Suite 150 City Newport Beach, CA Zip Code 92660 Phone 1 (949) 526-2580 Space Below for Use by City/County Staff Only Preceding Information Verified by [consistent with information in project -specific WQMP] Name: pate. Date Project -Specific WQMP Approved: Data Entered by Name: Date: Other Comments