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a <br /> ApEd"IS ENVIRONMENTAL , INC . <br /> 105 �ydW' <br /> Cade,5tlti'e tdO?Rvsevflle, CA 95678 + 916.782-21101916.969-2110 1 FAX 916.786-7830 <br /> June 21, 1993 <br /> Mr Dan Kirk <br /> Shell Oil Company <br /> Post Office Box 5278 <br /> Concord, California 94520 <br /> Subject Quarterly Groundwater Monitoring Report <br /> Shed Service Station (WIC No 204-7525-0104) <br /> 6131 Pacific Avenue, Stockton, California <br /> Dear Mr Kirk <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 /> April 28, 1993, at the subject site by Blaine Tech Services, Inc , of San Jose, California. <br /> Third quarter monitoring and sampling is scheduled for the site in August 1993. The <br /> sampling will include purging of at least three well volumes of groundwater from each of <br /> the wells. Temperature, conductivity, pH, and turbidity will be measured and/or observed <br /> for groundwater stability parameters prior to sampling. <br /> Aegis is continuing its efforts to obtain right-of-entry agreements from neighboring <br /> property owners for off-site subsurface investigation activities <br /> Ti ie inter pr G—tions and j or vnr%"101ona that may be r;nnta�r3G�fi within this rEapC]I#represent <br /> our professional opinions. These opinions are based on currently available information, <br /> and were developed in accordance with accepted geologic, hydrogeologic, and <br /> engineering practices for this time and for this specific site. Other than this, no warranty <br /> is implied or intended. <br /> • <br /> 90-02OF OMR <br /> GEOLOGISTS - ENGINEERS • GROUNDWATER SCIENTISTS <br />