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AEGIS ENVIRONMENTAL , INC . <br /> 1050 Melody Lane,Suite 160, Roseville, CA 95678 t 916.782-2110/916.969-2110/FAX 916.786-7830 <br /> June 7, 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 /> Shell Service Station (WIC No 204-7524-2408) <br /> 401 4445 Pershing Avenue, Stockton, California <br /> Dear Mr Kirk <br /> Aegis Environmental, Inc (Aegis), is pleased to provide Shell Oil Company (Shell) the <br /> attached information documenting the results of quarterly groundwater monitoring <br /> conducted on April 28, 1993, at the subject site by Blaine Tech Services, Inc , of San <br /> 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 /> The interpretations and/or conclusions that may be contained within the attachments <br /> represent our professional opinions These opinions are based on currently available <br /> information and were developed in accordance with currently accepted geologic, <br /> hydrogeologic, and engineering practices at this time and for this specific site Other than <br /> this, no warranty is implied or intended <br /> 89-016G QMR <br /> GEOLOGISTS - ENGINEERS - GROUNDWATER SCIENTISTS <br />