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u <br /> 3 e+-.,r,...:+ Y � �"r 'err �. ?r .� a y't•'Y.'" ;r: n-{g 1�R +�', :�x_;.'..;"fir' —r`'w.'a ,Y:.` � IrGs�r� i <br /> ''�"-• 4?»"' a}I' f' e .� w .,!✓!,u "#f.eTa "t: <br /> 100 <br /> i1 <br /> SIERRA <br /> lndnslr'es of Slc,cktolr,Cahfarnia.' Tile diesel lank fatted the test title to a leaking stat on the sub- <br /> { ]rump housilig. Precision lnclustrirs rrrported that fess than one gallw� of diesel fuel hat )ct;n <br /> yT <br /> 11111.� <br /> 1.4 Topography and Geologic Setting <br /> I <br /> The situ is located in Lorli. California at an elevation of approximately 10 fl above mea <br /> Fn^� 5tu leviq. The,tie topography is flat.and the site Isbordered on tire tiorthc:rn and southern sides <br /> by Ctelds, i3ustnes border the e.lslertt 1118 western sides of the property. <br /> I'Ite cinsest surface water is a nlorsh area approximately 10o0 [t west of the site. There <br /> The storage <br /> :)rt also unnamed storage cabals located apprn3inrltely i mile west of the site." <br /> c;utals:rend north-south and border the western s'.de of the WhiteEoul;h Water Polhltion Control <br /> Plant located 1.5 utiles south of the slte. <br /> +, <br /> Subsurface work at the site indicates that the site is underlain by alluvial anJ colluvial <br /> � sanely silt and clay. '!'he soils cncounlerc;d in this investigation were relatively homogeneous with <br /> .1 low to nic,cierate estimatedm <br /> pereability. 'rhe total depth of the alluvium beneath UM site is <br /> 1.1 nitnomI. <br /> 'rhe eeplll to ground water at the site is approxiluately 13.5 ft below grade(approximately <br /> iradient of <br /> 4 1't below nlcan sea level). The ground%4'atcr flow dlrcciion is to the no-t}1e.1st with a g <br /> alrproxhnatcly 0.0013 ft/1't. 'rhe observed groundwater flow direction did not correlate with the <br /> surfaCtf topographic gradlcnt. <br /> A fire department domestic water supply well was identified approximately 10 ft north of <br /> f+�¢ the northern site property Loundary. The well is 360 ft deep arid water pumped from the well is <br /> ' l7ccf:.inn Industries. 1987.Contractors ltrpurt nr-rank'rest Result-June <br /> e Prcr:tstorr Industries. l9Y.8,contractors Icl.ter to s:ut Joaquin Ilc;rllh Dcpartrnrrnt regarding tank test results, <br /> iF prcp:m:cl forThrce 13's Truck 23, 1958, 1 PP' <br /> tisGS. 1975,7,5 Minute lnpognphlc,mapclerntlrunls iwadr angle. 1:24.000. <br /> Page 4 <br />