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FIELD PROCEDURES <br /> Ground Water Measuring, Purging, and Sampling <br /> The water level in each well was measured with an electronic well sounder The wells were <br /> checked for free product with a clean disposable bailer prior to purging and sampling Due to <br /> the observed free product in well MW 1, it was not sampled When free product was not <br /> observed in wells MW2, MW3, and MW4, the ground water was purged using a submersible <br /> pump Purging of the wells included the removal of approximately three well volumes of water <br /> from each well Ground water samples were then collected with new polyethylene disposable <br /> bailers and decanted into appropriate sampling containers provided by the laboratory The <br /> samples were immediately placed in an ice chest containing ice Samples were transported under <br /> chain-of-custody documentation to a California Department of Health Services-certified laboratory <br /> for analysis of Total Petroleum Hydrocarbons (TPH) as gasoline, diesel and motor oil using EPA <br /> method 8015, and for Benzene, Toluene, Ethylbenzene, and Total Xylenes (BTEX) using EPA <br /> method 602 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 sampling equipment was cleaned with a solution of trisodium phosphate and water between <br /> each well to minimize the potential for cross-contamination All water removed during purging <br /> operations was placed in sealed, labeled 55-gallon drums and store on-site <br /> '*N7 <br /> WALLACE KUHL <br /> Re vc��Fwp.. &ASSOCIATES imc <br />