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a <br /> AEG IS ENVIRONM ENTAL , INC . <br /> 1050 Melody Lane, Suite 160, Roseville, CA 95678 ♦ 916. 782-2110 1916.969-21101 FAX 916.786-7830 <br /> April 1, 1993 <br /> Mr Dan Kirk <br /> Shell Oil Company <br /> Post Office Box 5278 <br /> Concord, California 94520 <br /> Subject Annual Groundwater Monitoring Report <br /> Shell Service Station (WIC No 204-7884-0901) <br /> 3725 Tracy Boulevard, Tracy, 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 annual groundwater monitoring, conducted on <br /> February 20, 1993, at the subject site by Blaine Tech Services, Inc , of San Jose, <br /> California Gasoline constituents, including benzene, have not been indicated above the <br /> method detection or practical quantitation reporting limits in any of the three wells since <br /> their installation in August 1990 It remains the opinion of Aegis and Shell that shallow <br /> groundwater does not contain petroleum hydrocarbons, and the site should be a <br /> candidate for closure <br /> The interpretations and conclusions contained within the attachments represent our <br /> professional opinions These opinions are based on currently available information and <br /> were developed in accordance with currently accepted geologic, hydrogeologic and <br /> engineering practices at this time and for this specific site Other than this, no warranty <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 /> 90-089B QMR <br /> GEOLOGISTS • ENGINEERS • GROUNDWATER SCIENTISTS <br />