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I <br /> FIELD PROCEDURES <br /> Ground Water Measuring, Purging, and Sampling <br /> The water level in each well was measured with an electronic water level indicator The wells <br /> were checked for free product with a new, clean, disposable polyethylene bailer prior to purging <br /> and sampling Groundwater was purged from the wells by using a 3'A-inch diameter polyvinyl <br /> chloride (PVC) bailer Purging of the wells included the removal of approximately four well <br /> 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 The samples were immediately placed in an ice-chest containing ice and <br /> submitted under chain-of-custody to a California Department of Health Services certified <br /> laboratory for analysis of Total Petroleum Hydrocarbons (TPH) as gasoline, diesel using <br /> modified EPA method 8015 and Benzene, Toluene, Ethylbenzene, and Total Xylenes 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 /> Prior to sampling the wells, the sampling equipment was cleaned with a solution of trisodium <br /> phosphate and water to minimize the potential for cross-contamination between the wells All <br /> water removed during purging operations was placed in sealed, labeled 55 gallon drums and <br /> stored on-site <br /> • <br /> WALLACE-KUHL <br /> Rerydedpapa &ASSOCIAMS INC <br />