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AEGIS ENVIRONMENTAL , INC <br /> 1050 Melody Lane, Suite 160, Roseville, CA 95678 ♦ 916.782-21101916.969-2110 1 FAX 916.786-7830 <br /> October 14, 1992 <br /> Mr Dan Kirk <br /> Shell Oil Company <br /> Post Office Box 5278 <br /> Concord, California 94520 <br /> Subject Quarterly Groundwater Monitoring Report <br /> Shell Service Station (WIC No 204-7525-0104) <br /> 6131 Pacific Avenue, Stockton, California <br /> . Dear Mr Kirk <br /> 1 <br /> Aegis Environmental, Inc (Aegis), Is pleased to provide Shell Oil Company the attached <br /> information documenting the results of quarterly groundwater monitoring conducted on <br /> July 8, 1992, at the subject site The monitoring was performed by Emcon Associates, <br /> of Sacramento, California <br /> Aegis intends to perform first quarter monitoring and sampling at the site In January 1993 <br /> The sampling will Include purging at least three well volumes of groundwater from each <br /> of the wells Temperature, conductivity, pH, and turbidity will be measured and/or <br /> observed for groundwater stability parameters prior to sampling <br /> The interpretations and/or conclusions that may be contained within this report represent <br /> our professional opinions These opinions are based on currently available Information, <br /> and were developed in accordance with accepted geologic, hydrogeologlc, and <br /> enaineerino oractices for this time and fnr this cnarifirr site rlther than thic nn tie,7rroniar <br /> ,.+ r +r+�� v, w •r a.0 a.agar <br /> is implied or Intended <br /> This report has been prepared solely for the use of Shell Oil Company Any reliance on <br /> this report by third parties shall be at such parties' sole risk This report was prepared <br /> under the direct supervision of the professional geologist, registered with the state of <br /> California, whose signature appears below <br /> 90-020C QMR <br /> GEOLOGISTS • ENGINEERS a GROUNDWATER SCIENTISTS <br />