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1 <br /> OD <br /> IM(on <br /> ASSOCIATES April 2, 1992 <br /> Consultants in Waste Project G67-05 01 <br /> Management and <br /> Envnronmentat Control <br /> Ms Jackie Doub <br /> Aegis Environmental, Inc <br /> 1050 Melody Lane, Suite 160 <br /> Roseville, California 95678 <br /> Re First Quarter 1992 Venfication Monitoring Report, 420 West Kettleman <br /> Lane, Lodi, WIC# 204-4416-0202 <br /> Dear Ms Doub: <br /> This letter report presents the results of the venfication ground-water monitoring <br /> ' event for the Shell Oil Company (Shell) service station at 420 West Kettleman <br /> Lane, Lodi This monitoring was conducted to verify the results of the quarterly <br /> monitoring performed on January 21, 1992 <br /> GROUND-WATER LEVEL SURVEY <br /> On March 12, 1992, static water levels were measured in all site wells before <br /> purging and sampling. Water levels were measured to 0 01 foot using an <br /> oil/water interface probe Water-level measurements are presented in Table 1 <br /> ' SAMPLING AND ANALYSIS <br /> Ground-water samples were collected on March 12, 1992 from monitoring wells <br /> MW-1 and MW-3. A site map, including the monitoring well locations, is <br /> attached, as provided by Aegis Environmental. Ground-water monitoring wells <br /> were purged before sampling using a polyvinyl chloride bailer, a low-flow <br />' submersible pump, or a Teflon® baler. Samples were collected using a Teflon <br /> baler. The procedures used to purge and sample ground-water mon:tonng <br /> wells were detailed in our November 14, 1991 Proposal to Conduct Ground- <br /> water Monitoring for Shell Oil Company, and were included in our first quarter <br /> ground-water monitoring report. <br />' Samples were cooled with ice packs and delivered, under chain-of-custody <br /> control, to a Shell-approved analytical laboratory for analysis. <br />' 1433 N Markel Boulevard Sacramento California 95834 (916) 925 3300 <br />