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FIELD PROCEDURES <br /> Groundwater Measuring, Purging, and SamplinE <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 clean, disposable polyethylene bailer prior to purging and <br /> sampling Purging of the wells included the removal of approximately three well volumes of <br /> water from each well by using disposable polyethylene bailers Groundwater samples were then <br /> collected with new polyethylene disposable bailers and decanted into appropriate sampling <br /> containers provided by the analytical laboratory The samples were immediately placed in an ice- <br /> chest containing ice and submitted under chain-of-custody to a California Department of Health <br /> Services certified laboratory for analysis of Total Petroleum Hydrocarbons as gasoline (TPH-g) <br /> using modified EPA method 8015 and Benzene, Toluene, Ethylbenzene, and Total Xylenes using <br /> EPA 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 /> Prior to sampling the wells, the sampling equipment was cleaned with a solution of Liquinox® <br /> and water to minimize the potential for cross-contamination between the wells All water <br /> removed during purging operations was placed in sealed, labeled 55 gallon drums and stored on- <br /> site <br /> i <br /> MM <br /> WALLACE-KUHL <br /> Recycled paper 6 ASSOCIATES INC <br />