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01 May 2002 <br /> AGE-NC Project No. 01-0875 <br /> Page 4 of 6 <br /> 4.4. STOCKPILE SOIL SAMPLING <br /> Before soil disposal at the Forward Landfill,additional sampling of the soil stockpile was requested <br /> by the disposer, Allied, hie., for stockpile characterization. On 20 March 2002, additional soil <br /> samples were collected with a metric soil sampling hammer,loaded with a pre-cleaned brass sleeve. <br /> The ends of the brass sleeves were sealed with a Teflon plastic and end caps were tapped over the <br /> ends of each sample sleeve.The samples were labeled,placed in a chilled container and transported <br /> under chain-of-custody procedures to Cal Tech Environmental Laboratories to be analyzed for: <br /> • The five Leaking Underground Fuel Tank (LUFT) metals chromium(Cr), copper(Cu), <br /> lead(Pb), nickel(Ni), and zinc(Zn)by EPA Method 6010B, and <br /> • Polychlorinated biphenyls (PCBs)by EPA Method 8082. <br /> 4.5. EQUIPMENT DECONTAMINATION <br /> Prior to sample collection,all soil and groundwater sampling equipment was thoroughly rinsed with <br /> clean water after washing with a solution of Alconox.Geoprobe rods were thoroughly cleaned prior <br /> to soil probe boring advancement. <br /> 5.0. FINDINGS <br /> Soil descriptions were determined from field data;hydrocarbon-impacted soil and groundwater were <br /> determined from laboratory analysis of soil and ground water samples. <br /> 5.1. SOIL COMPOSITION <br /> The upper 20 feet of soil consisted of brown to yellow brown lean clays and clayey silts. Yellow <br /> brown fine sands and silty sands were identified from 20 feet bsg to the total depth of the borings. <br /> 5.2. GROUND WATER DEPTH <br /> Ground water was encountered between 21 feet and 27 feet bsg in the two soil boring locations. <br /> Advanced GmEnvironmen[al,Inc. <br /> i <br />