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y - <br /> `i <br /> r► ` 1 <br /> , e <br /> 1 <br /> 3.0 REGIONAL GEOLOGY AND HYDROGGOLOGY <br /> The site is underlain by the Turlock Lake Formation, which consist of Plio-Pleistocene <br /> nonmarine sedimentary deposits that range in size from gravel to clay(Rogers, T.H. 1966), <br /> W To the west lie Middle to Lower Pliocene non-marine sediments, underlain by Upper <br /> Cretaceous marine sedimentary rocks. The site is in an area of northwest-southeast trending <br /> faults, <br /> � f <br /> The Site is in the northwestern San Joaquin County Ground-Wa.er Basin (California <br /> t y <br /> rDepartment of Water Resources, 1988). According to the San Joaquin Public Health k <br /> Service (SJPHS), the depth to!ground water is greater,than:100 feet',below grate: <br /> w� <br /> 4.0 PROXIMITY OF WELLS AND UTILITIES <br /> ` a � <br /> Lj <br /> f r� The site map provided by ARCO shows a septic tank on-site northwest of the. station <br /> i.: <br /> building and a second septic tank along with a disposal field on the northwest boundary of <br /> r <br /> the property. It is our understanding from San Joaquin County Planning Commission.that. r' <br /> t <br /> there:are'rto water or,sewer-lines in the area <br /> A list of well data obtained at the California Department of Water Resources indicated an <br /> F t , <br /> industrial and a domestic well near the site. Information concerning these wells and other <br /> nearby water supply wells are presented in'fable 1. Eleven out of seventeen well locations <br /> are depicted on the Site Vicinity Map (Figure 1), Six of the wells could not be accurately <br /> 3 Doc iMR067671VI.] <br />