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t' <br /> Mr. William Moranda • - 3 - 8 October 2003 <br /> Former Buffalo Tank Corporation, Stockton <br /> 5. Sampling and analysis of the two private wells near the site, using the complete list of proposed <br /> and required analyses, is required. Detection limits should be adequate to determine if there are <br /> threats to water quality. The enclosed memo provides the Water Quality Objectives for <br /> petroleum hydrocarbons. <br /> 6. Sampling groundwater with a disposable bailer through the open augers is not an acceptable <br /> sampling practice, due to the potential for cross-contamination from contaminated soil sloughing <br /> from or sticking to the inside of the auger or from the soil coring tool. Sampling below the <br /> augers through the Hydropunch®tool is acceptable for a discreet grab water sample. <br /> Please apply for all necessary San Joaquin County boring/well permits and provide at least 72 hours (3 <br /> working days) notification prior to initiating field activities, so that I may be present during the <br /> fieldwork. <br /> If you have any questions you may contact me at (916)255-3115 or bartonj(a-,rb5s.swrcb.ca.gov. <br /> APPROVED <br /> James L. Barton, R.G. Author �3 L <br /> Engineering Geologist <br /> Senior t'I �— <br /> Enclosure <br /> cc: Ms. Margaret Lagorio, San Joaquin County Environmental Health Services, Stockton <br /> Ms. Donna Sexton, Advanced GeoEnvironmental, Stockton <br />