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Mr. Michael Infurna, Jr. 4 February 1997 <br /> San Joaquin County Environmental Health Division Page 2 <br /> .r <br /> 3) Soil vapor extraction system data for the period ending February 1996 will be presented <br /> rtin the fast qua-ter 1997 quarterly monitoring report. Based on a preliminary review of <br /> ;'that data collected by the previous consultants, Aegis Environmental, Inc. and Fugro <br /> 1�West, it appears that the soil vapor extraction system should be restarted. <br /> 4) A well survey and subsurface conduit survey will be conducted if a risk-based site closure <br /> is required following completion of soil remediation at the site. <br /> 5) The Aegis Environmental and Fugro West files will by searched for monitoring well <br /> construction details and-soil boring logs._These data may aid in the-preparation of water. <br /> table contour maps (issue 2). The well construction detail reports and a table <br /> summarizing their construction will be submitted with the first quarter 1997 quarterly <br /> 11 monitoring report. <br /> If you have any questions, please feel free to contact me at (510) 283-7077. <br /> Sincerely, <br /> James R. Brownell, R.G. <br /> Senior Geologist <br /> cc: !RMs. Marla GuensIer, Exxon Company, U.S.A. <br /> BMs. Christa Marting, EA Engineering <br /> rf <br /> l <br /> IE <br /> II <br />