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-.Scptetnber 24 1999 <br /> Job Number:S99244 <br /> ' Page 5 <br /> VL GEOLOGY- SOIL <br /> S, AIVD.PERCOLATION _ . <br /> . ION TET <br /> S .. <br /> The geology of the area is reported to be Pliocene age fanglomerate deposits consisting of <br /> conglomerate; sandstone, and siltstane.':.These typesotd- <br /> posits are:commonly unconsolidated <br /> t and heterogeneous in nature. Below the fanglomerate'deposits are older Cenozoic and Mesozoic <br /> deposits that commonly dip eastward into the San Joaquin Valley trough. Several surficial and <br /> . buried thrust faults are located along the eastern boundary".of the Sacramento and San Joaquin <br /> Valleys., The most noteworthy is the Great.Valley Fault(segment,no. 7)located about 1 mile east . <br /> that are thought to be a significant earthquake source and similar i' georn ry to the 1983: <br /> Coalinga earthquake blind thrust faults. <br /> The.soils located on the site are'reported to be the Rioblanchoclams(Plate 3): The'- <br /> following is an excerpt of the engineering properties for the following sotl. <br />. r Selected Soil Properties from the Soil'Survey of San Joaquin County,.California' . <br /> Soil Name Depth(in) Unified Soil Salinity Soil Reaction Septic tank <br /> and Map Classification mmhoslcm pH absorption fields <br /> Symbol <br /> Carbon 0-6:Clay loam CL <4 7.4-8.4 <br /> clay loam;' 6-25:Clay loam, CL,'CH <4 7.4 <br /> 123 . . clay <br /> 't- 25-j& Clay loam,. CL,CH <4 7.9-8:4. <br /> Clay <br /> 36 2: Clay loam CL _54. 7-9-8.4 Severe:peres <br /> sldwl <br /> Note: .The table descriptions do not neccssarily reflect site-specific soil properties. <br /> Soil boringB-1 was excavated to a <br /> {, ) depth of 40-feet to characterize the,sots.profile.of the <br /> site and determine the depth.to ground water(Plate4 and Plate 5). No ground water was <br /> encountered to a total depth of 40 feet. A sand��section with good percolation potential,was . f <br /> - Wagner,.D.L..Bortugno,E.J:,and McJunkin,R.D., 1990,Geologic Map of the San Jose Quadrangle, <br /> California- Califoima Division,of Mmes and Geology,Regional Map Series Map No. 5a° 'Scale 1.250,000. <br /> 2 USDA Soil Conservation Service, Soil Survey of San Joaquin County, California, sheet 8. . . # <br /> M1 �ssoc� <br />