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Pacific Gas and Electric Company <br /> 202/799-5043 <br /> July 29 , 1988 <br /> sample tubes . The sampler was driven 18 inches ahead of the <br /> augers at each point_ . The collected samples were capped sealed <br /> and packed on ice in an insulated cooler for subsequent shipment <br /> to GT Environmental Laboratories (GTEL) in Concot,,'. jli.fornia. <br /> Proper chain--of-custody procedures were followed for the samples <br /> at all times . Each sample was labeled with the boring number , <br /> sample identification and the sample depth. All soil sampling <br /> was conducted in accordance with GTI ' s Standard Operating <br /> Procedures ( SOP) 11 , 14 and 15 (see Appendix II ) <br /> Soil samples submitted for laboratory analyses were selected <br /> by the following field screening methods . All samples obtained <br /> during drilling were visually examined ( i . e. for odors, dis- <br /> coloration) and analyzed using a Photovac photo-ionization <br /> detector (PID) for the presence of petroleum hydrocarbons . The <br /> field screening was used to select only those samples that <br /> apparently contained hydrocarbon constituents for laboratory <br /> analyses . Field screening of samples serves to reduce performing <br /> unnecessary laboratory analyses on samples that may not contain <br /> the constituents of concern. <br /> LABORATORY ANALYSES <br /> Selected soil samples were analyzed for TPH using EPA <br /> Methods 8020/8015 and EPA Method 418 . 1 . In addition, soil sample <br /> SB-1B was analyzed for purgeable volatiles by EPA Method 8204 , <br /> bases and acids by EPA Method 8270, polychlorinated biphenyls <br /> (PCBs) by EPA Method 8080, and triethylene glycol by a EPA <br /> modified Method 8015 . <br /> 6 <br />