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t _ a <br /> - I <br /> s <br /> ' 1 <br /> P � <br /> O.Z.S. - Stockton Plating InO. <br /> I�I OeiaLdr 1Gp 1991 <br /> i Page _7 <br /> J� <br /> 7 , <br /> 3.2 Soil Samples <br /> ! Three soil samples were colla-ted from each boring for <br /> laboratory analyses (total le samples) . The soil samples were <br /> retained, undisturbed, in the brass liners. The liners were <br /> i,. sealed at the ends with aluminum foil, capped, wrapped with <br /> { <br /> plastic tape, and labeled. The samples were stored for shipment <br /> in a cooler chilled with Blue Ice and delivered under chain-of- <br /> "' <br /> custody procedures to GeoAnalytical Laboratories, Inc. , in <br /> y <br /> t<i <br /> r Modesto, California. The samples were delivered to the <br /> i ` laboratory within 24 hours of collection and inalyzed using U.S. <br /> f <br /> (, EPA Methods and California-approved methods. The samples were <br /> analyzed for total petroleum hydrocarbons-gasoline (TPH-G) by <br /> Method 5030/LUFT, for benzene, toluene, ethyl benzene and xylene <br /> (BTEX) by EPA Method 8020, for total petroleum hydrocarbons- <br /> i diesel (TPH-D) by Method TEPH/LUFT and for total lead (Pb) by <br /> Method 7420. <br /> A 4.0 LABORATORYRESULTS <br /> Laboratory analyses indicate that TPH-G (280 mg/kg and 2.6 <br /> t mg/kg) and BTEX constituents were detected in SB3 at depths of 20 <br /> and 30 feet, respectively. Concentrations of BTEX were also <br /> � t aseacted in sail boring SB2 at 20 feet and 45 feet, and in soil <br /> P ua <br /> borings SB4, SB5, and SB6 at 45 feet. Diesel was detected at 26 <br /> � s <br /> mg/kg in SBI at a depth of 50 feet. See Table l for lah0r&tory <br /> .U, <br /> CONDOR <br /> t, <br />