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01 7 <br /> TAB!"E+ A <br /> v'.;, t]S OVEIXCAYAT1dN s(3i1 SAMPLEAL��FS <br /> v�ldage Weld MRna,5tacktq� doa Cauu�y <br /> es lts a pressed uu m 0" <br /> EPA Method EPA Method 602 CA LUFT <br /> 8015-mod 12187 <br /> Sample Aate Total Organic <br /> No. Sampled TPH-g Benzene Toluene I Ethylbenzene Xylenes Lead <br /> N-Bottom 07/20/93 4.3 0.065 0.038 0.14 0.57 ND <br /> S-Bottom 07/20/93 340 5.8 13 8.9 44 ND <br /> N-Wall 07/20/93 330 0.69 0.44 3.4 15 NA <br /> S-Wall 07/20/93 4.7 0.68 0.016 0.46 1.2 NA <br /> E-Wall 07/20/93 ND ND ND ND ND NA <br /> W-Wall 07/20/93 ND ND ND ND ND NA <br /> Reporting 1 mglKg 0.005 mg/Kg 0.05 <br /> Limits mgt <br /> ND Not detected above the reporting limit of the laboratory test. <br /> NA Not analyzed <br /> Laboratory analyses by Sequoia Analyrual of Concord <br /> An estimated 260 cubic yards of newly-excavated soil was removed from the tank pit and stored <br /> at a location on the south side of the property, and separately from soil stockpiled during the <br /> tank removal operation. Upon completion of the excavation activities, two bottom- and four <br /> side-wall samples were gathered in the excavator bucket as directed by Mr. Collins. The soil <br /> samples were then retrieved from the bucket of the excavator by driving a clean hand-sampler <br /> containing a sterile, two-inch diameter, six-inch stainless steel tube into the gathered soil. The <br /> sample tube was immediately sealed with Teflon`'"'` tape, capped, taped, labeled, and placed on <br /> ice in a cooler for transport to a California Department of Health Services-certified laboratory <br /> for analysis. Appropriate chain-of-custody procedures were followed during sample handling. <br /> Each sample was analyzed for TPH-g by EPA Method 8015, BTEX analytes by EPA Method <br /> 8020, and organic lead per the California Leaking Underground Fuel Tank manual (State Water <br /> Resources Board, 1989). <br /> The excavation was backfilled in May 1994 subsequent to collection of stockpile soil samples <br /> for single-sample-composite analyses in order to detect residual TPH-g and TRPH-d analytes. <br /> Favorable results (all analytes were nondetectable) allowed for stockpile backfill were approved <br /> in a letter dated May 10, 1994 from SJCPHS-EHD Specialist Michael Collins to Mr. Dwight <br /> Davis of the Pegasus Group. <br /> W W. Irwin, Inc. <br /> Project No. 33016.05&.06 <br /> 3 <br /> August 1995 <br />