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1444 MARIPOSA <br /> WKA No. 2938.03 <br /> February 1, 1996 <br /> Page 5 <br /> The wells will be installed and constructed based on site-specific geologic conditions and will be <br /> surveyed with respect to mean sea level (MSL). <br /> Soil samples will be transported under chain-of-custody to a California-certified laboratory for <br /> analysis of Total Petroleum Hydrocarbons (TPH) as gasoline, diesel and motor oil using <br /> Modified EPA Method 8015 and Benzene, Toluene, Ethylbenzene, and Total Xylenes (BTEX) <br /> using EPA Method 8020. �P%t <br /> The wells will be developed using a vented surge block. Subsequent to surging, the wells would <br /> be purged until stabilized pH, temperature, and conductivity readings are attained and/or the <br /> water is relatively free of sediment. Prior to purging and sampling, the water level in each well <br /> will be measured with an electronic water level indicator and checked for free product with a <br /> new, clean, disposable polyethylene bailer. If free product is not observed, the wells will be <br /> purged of a minimum of three well volumes of water from each well. Ground water generated <br /> from well development and purging activities will be pumped into 55-gallon drums to be stored <br /> on site. <br /> One water sample will be collected from each well with new polyethylene disposable bailers and <br /> decanted into appropriate sampling containers provided by the analytical laboratory. The samples <br /> will immediately be placed in an ice chest containing ice. Water samples along with a travel <br /> blank will be transported under chain-of-custody documentation to a California-certified <br /> laboratory for analysis of TPH as gasoline, diesel and motor oil using modified EPA method <br /> 8015 and BTEX using EPA method 8020. The sampling equipment will be cleaned with a <br /> solution of trisodium phosphate between each well to minimize the potential for cross- <br /> contamination. <br /> Of <br /> REPORTING <br /> Upon completion of our field work and the laboratory testing, we will prepare a technical report <br /> ` that will include the following: <br /> v <br /> WALLACE•KUHL <br /> Recycled paper &ASSOCIATES INC. <br />