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FIELD PROCEDURES <br /> Is <br /> Ground Water Measuring, Purging, and Sam lin <br /> The water level in each well was measured with an electronic water Ievel indicator The wells <br /> were checked for free product with a new, clean, disposable polyethylene bailer prior to purging <br /> and sampling When free product was not observed, the ground water was purged with a 2-inch <br /> diameter submersible pump Purging of the wells included the removal of approximately three <br /> well volumes of water from each well Ground water samples were then collected with new <br /> polyethylene disposable bailers and decanted into appropriate sampling containers provided by the <br /> analytical laboratory <br /> On September 9, 1993, duplicate samples were obtained from each well and immediately placed <br /> in an ice-chest with ice and submitted under separate chain-of-custodies to two California- <br /> certified laboratories for analysis of Total Petroleum Hydrocarbons (TPH) using EPA method <br /> 8015, and Benzene, Toluene, Ethylbenzene and Total Xylenes (BTEX) using EPA method 602 <br /> On November 5, 1993, ground water samples were collected with new polyethylene disposable <br /> bailers and decanted into appropriate sampling containers provided by the analytical laboratory <br /> The samples were immediately placed in an ice chest containing ice Samples were transported <br /> under chain-of-custody documentation to a California Department of Health Services-certified <br /> laboratory for analysis of TPH using modified EPA method 8015/5030 and for BTEX using EPA <br /> method 8020 A clean 'travel blank" of distilled water was transported along with the water <br /> samples for the purposes of detecting cross-contamination from field activities <br /> The travel blank was analyzed for TPH as gasoline, diesel, and BTEX using the above analyses <br /> The sampling equipment was cleaned with a solution of trisodium phosphate between each well to <br /> minimize the potential for cross-contamination All water removed during purging operations <br /> was placed in sealed, labeled 55-gallon drums and store on-site <br /> `�W <br /> WALLACE•ZC JML <br /> Re"ckd papr s AssoaAI Es INC <br />