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-WGE- � 1386 E. BEAMER STREET <br /> WOODLAND,CA 95695-9603 <br /> WESTERN GEO-ENGINEERS FAX (916)662-0273 <br /> CALIF. CONTRACTOR a 513857 A CORPORATION (916) 662-4541 <br /> REGISTERED GEOLOGISTS <br /> Mr. John Rutherford <br /> DESERT PETROLEUM <br /> P.O. Box 1601 <br /> Oxnard, CA 93032 <br /> (805) 644-6784 <br /> RE: Summary of previous work attributed to Western Geo-Engineers <br /> for DESERT PETROLEUM SERVICE STATION #787, 950 11th Street, Tracy, <br /> CA. <br /> Two reports were submitted concerning the above site: <br /> A. Soil and Ground Water Investigation, dated July 28 , 1988, <br /> study conducted in May and June, 1988 . <br /> Field Investigative Methods <br /> 1 . Collecting soil and water samples from the <br /> excavations; <br /> 2. Drilling three exploratory boreholes (monitor wells <br /> 1 through 3) ; <br /> 3. Converting these boreholes into ground water <br /> monitoring wells; <br /> 4. Collecting ground water samples; <br /> 5. Surveying the well heads; <br /> 6. Collecting ground water gradient data throughout <br /> this assessment period. <br /> B. Ground water monitoring, supplemental report to the Soil <br /> and Ground Water Investigation, dated September 14, <br /> 1988, conducted during the months of July and August, 1988. <br /> Upon request, Western Geo-Engineers proceeded with a ground water <br /> sampling for DESERT PETROLEUM for May, 1990. <br />