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r <br /> WA"ACE INC <br /> U: <br /> A 4. 1' 1.01 <br /> Page 5 <br /> Samples from the former tank ex tion were oolleed#,turn the bu,oket of the excavator by <br /> drivin.g;two:jooh differ.brims*owes icy the bucket. Thee sanvtes were <br /> collected under the direct supero ion of Steve Sohnojider,Snvironmental Health Inspector for <br /> San Joaquin County. SAMA%s 466 the 'roduct p pirW trench were collected by hand <br /> angering to sah}ph depth and the diriving a s le a c�i ped with a clean six-inch tong, <br /> two-inch diameter proles Sleeve int e the soil. Petr sof s Born each of the two stockpiles <br /> were cottect, d nd einipWto d irw t 1 0r4t ry ja r o ff,` . Thesamples were collected <br /> by removing°:t#e tm s vetai feet of�04'4t eacWs-a f�3t ation and then driving two-inch <br /> diameter brass sleeves into the soil. The samples were screened with an organic vapor <br /> analyzer (OVA) to estimate the extent of hydrocarbon contamination. Immediately after <br /> collection, samples were capped wh foil and plastic caps,sealed with tape and stored on ice. <br /> All sampling equipment was cleaned with trisodiurn phosphate between sampling locations. <br /> Ground Water Sarnglinp <br /> A sample of water from the excavation was collected by lowering a clean disposable bailer <br /> ' into the water that had percolated into the excavation. The water was then decanted into the <br /> appropriate sample containers and stored on ice after cdi)ection. <br /> The ground watch and sail samples were handl d.and tr sport-ed according to the State of <br /> California Leaking 'Underground Fuel Tap4k (LUrT-) guidelOk"ps. The samples were delivered to <br /> a California state-certified=laboratory and..analyzed for total petroleum hydrocarbons (TPH) as <br /> diesel and benzene, toluene, xylene and ethyl benzene (13TX&f) by EPA methods 8015 and <br /> 8020, respectively. A summary of complete laboratory test results and chain-of-custody <br /> documents are appended. <br /> FINDINGS <br /> Soil Conditions <br /> The boring logs and observations made during excavation indicate that the soils beneath the <br /> I site consist of imported fill from grade to a depth of approximately eight feet, where a <br /> { <br /> j <br /> F - { <br />