Analytical Report 2013-020-19Sladden Engineering
6782 Stanton Ave., Suite A, Buena Park, CA 90621 (714) 523-0952 Fax (714) 523-1369
45090 Golf Center Pkwy, Suite F, Indio, CA 92201 (760) 863-0713 Fax (760) 863-0847
450 Egan Avenue, Beaumont, CA 92223 (951) 845-7743 Fax (951) 845-8863
Date: February 19, 2013
Account No.: 544-13032
Customer: Discovery Land Company
Location: Madison Club, 81346 Columbus Way, Lot 19A, La Quinta
Sulfate Series
Analytical Report
Soluble Sulfates
per CA 417
ppm
5600
Soluble Chloride
per CA 422
ppm
iiI[elll
Sulfate 544-13032 021913
February 20, 2013 -3- Project No. 544-13032
13-02-065
The seismic design category for a structure may be determined in accordance with Section 1613
of the 2010 CBC or ASCE7. According to the 2010 CBC, Site Class D may be used to estimate
design seismic loading for the proposed structures. The period of the structures should be less
than 1h second. This assumption should be verified by the project structural engineer. The 2010
CBC Seismic Design Parameters are summarized below.
Occupancy Category (Table 1604.5.): II
Site Class (Table 1613.5.2): D
Ss (Figure 1613.5.1):1.500g
S1(Figure 1613.5.1): 0.600g
Fa (Table 1613.5.3(1)):1.0
Fv (Table 1613.5.3(2)):1.5
Sms (Equation 16-36 (Fa X Ss}):1.500g
Sm1(Equation 16-37 {Fv X Sl}):1.900g
SDS (Equation 16-38 (2/3 X Sms}):1.000g
SD1 (Equation 16-39 (2/3 X Sml}): 0.600g
Seismic Design Category: D
In addition, we have sampled the surface soil on the subject lot to determine the soluble sulfate
content as it relates to selecting appropriate concrete mix designs. Testing indicates that the site
soil is generally considered non- corrosive with respect to concrete. The testing indicated soluble
sulfate content of 5600 ppm (0.560 percent) that corresponds with the "severe" exposure category
in accordance with ACI 318-08, Table 3. Based upon this, the use of sulfate resistance concrete
mixes will be required. Structural concrete in contact with soil should have a minimum
compressive strength of 4500 psi and a maximum water/cement ratio of 0.45.
We appreciate the opportunity to provide service to you on this project, if you have any
questions regarding this letter or the referenced reports please contact the undersigned.
Respectfully submitted,
SLADDEN ENGINEERING
BRETT L.
No. C45389
Brett L. Anderson EXp 9/30/14
Principal Engineer ,� CIVIL
E► GINEERING
SER/gvm
Copies: 4/ Discovery Land Company
Sladden Engineering