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SIERRA <br /> 11 1 1 <br /> . March 31, 1992 <br /> Emuonmental Services <br /> Clint Rogers <br /> Chevron USA <br /> P O Box 5004 <br /> San Ramon, CA 94583 <br /> Re Chevron Service Station #9-6171 <br /> 6633 Pacific Avenue <br /> Stockton, California <br /> SES Project #1-146-04 <br /> Dear Mr Rogers <br /> This report presents the results of the quarterly ground water sampling at Chevron Service <br /> Station #9-6171, located at 6633 Pacific Avenue in Stockton, California (Figure 1, Appendix A) <br /> Four wells MW-2 through MW-5, were sampled(Figure 2 Appendix A) One well, MW-1, was dry <br /> On March 12 1992, SES personnel visaed the site Water level measurements were, <br /> collected in all site wells and all wells were checked for the presence of free-phase hydrocarbons <br /> Free-phase hydrocarbons were not present sn any of the site wells Water level data are shown <br /> in Table 1 (Appendix B) and a ground water elevation contour map is included as Figure 2 <br /> (Appendix A) <br /> • The water samples were collected on March 12 1992 in accordance with SES Standard <br /> Operating Procedure - Ground Water Sampling (Appendix C) All analyses were performed by <br /> Superior Precision Analytical Inc of Martinez, California Analytic results for ground water are <br /> presented in Tables 2 and 3(Appendix B) The chain of custody document and laboratory analytic <br /> reports are included in Appendix D SES is not responsible for laboratory omissions or errors <br /> Please call if you have an <br /> Thank you for allowing us to provide services to Chevronease y y <br /> questions <br /> Sincerely <br /> Sierra Env me al Services <br /> Chris B amer <br /> Sena) P sect Engineer <br /> doge rGreensfelder ;"� —�� <br /> Registered Geologist #003011,, - <br /> CJB/RG/ly <br /> 146049M MR2 <br /> f <br /> Appendices A - Figures <br /> B - Tables <br /> C - SES Standard Operating Procedure ` <br /> D - Cham of Custody Document and Laboratory Analytic Reports <br /> PO Box 2546 • Martinez, California 94553 (510) 370 - 1280 <br />