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sir , <br /> * z <br /> AAw /o zs-Go <br /> Stephen G. Muir Sve / SS- 76 <br /> Consulting Geologist and Geophysicist S7iB z .-Se—G7 <br /> 18828 Lower Sacramento Road <br /> Woodbridge,CA 95258 <br /> (209)-369-9421 (209)369-9358 (fax) <br /> stevemuirna sbc¢lobal.net <br /> October 2,2014 <br /> Mr.Nuel Henderson <br /> San Joaquin County Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton, California 95205-6232 <br /> Re: Revised Letter Workplan for Select Groundwater Monitoring and Limited Soil <br /> Investigation Gillies Trucking Site, 3931 Newton Road, Stockton <br /> Dear Mr. Henderson: <br /> This revised letter workplan has been prepared at the request of Mr. Ken Gillies by Stephen G. <br /> Muir Consulting Geologist and Geophysicist(Muir). The workplan has been prepared to <br /> describe the sampling and analytical laboratory procedures to be followed for twelve (12) <br /> groundwater monitoring wells at the Gillies site and the drilling and sampling of one soil boring <br /> under the former waste oil underground storage tank(UST) shown on Figure 1. <br /> This work is being in conducted to fill data gaps that have been identified at the Gillies site for <br /> site closure consideration. This work has been directed by San Joaquin County Environmental <br /> Health Department(SJCEHD)by letter dated September 17, 2014. <br /> 1.0 INTRODUCTION <br /> The historic site investigative activities at the Gillies site have included the drilling and <br /> completion of 28 groundwater monitoring wells and six SVE wells between 1994 and 2011 <br /> (Figure 1). The Gillies site is currently under consideration for case closure. As part of case <br /> closure requirements,the SJCEHD has directed additional groundwater sampling of twelve wells <br /> and the drilling of a single soil boring under the former waste oil UST. This workplan outlines <br /> the scope of work and detailed descriptions of how the work will be conducted. Appendix 1 <br /> includes Regulatory Agency Correspondence. Appendix 2 describes procedures to be followed <br /> for subsurface investigations. Appendix 3 describes soil sample and groundwater sample <br /> handling protocols. Appendix 4 is information regarding the field filtering of water samples to <br /> be collected and analyzed for metals. <br /> 1 <br />