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Chevron <br /> PM 1 04 <br /> Chavron U.S.A.Products Company <br /> 6001 Bollinger Canyon Road <br /> September 14 1994 Building L <br /> San Ramon,CA 94583 <br /> P.O.Box 5004 <br /> San Ramon,CA 94583-0804 <br /> Mary Meays Marlmting—Northwest Region <br /> San Joaquin County Public Health Services Phone 510 842 9500 <br /> P. O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Former Si # 1-5 5431 Grandine Road,Banta, CA <br /> Attached Groundwater Monitoring Report(Blaine Tech, 8/31194) <br /> Dear Ms. Meays: <br /> Attached you will find a report dated August 31, 1994, which was prepared by Chevron's <br /> consultant, Blaine Tech Services, Inc. (Blaine Tech), to describe the results of groundwater <br /> monitoring which was performed at the subject site on August 16, 1994. <br /> All three site-related monitoring wells were gauged and sampled by Blaine Tech. Groundwater <br /> samples were analyzed for the presence of TPHGas and BTEX constituents. There were no <br /> dissolved petroleum hydrocarbons detected above the applicable reporting limits at any of the <br /> wells. <br /> A review of all soil analytical results obtained at the subject site indicate that residual levels of <br /> hydrocarbons are well below the LUFr recommended cleanup levels. Considering this, Chevron <br /> feels the most appropriate action at the subject site would be to continue groundwater monitoring <br /> for at least one year. If groundwater conditions remain unchanged after one complete year of <br /> monitoring,Chevron would then request case closure. <br /> If you have any questions or comments, you may contact me at(510) 842-8695. 1J <br /> Sincerely, <br /> zi W / <br /> Brett L. Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br /> attachment <br />