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v i <br /> Chevron <br /> 1 {�,�> �Y�ellTI)e_ ,ji _T11 Chevron <br /> o= `PIR' 14 `'ri 1 3.5- <br /> Chevron U.S.A.Products Company <br /> 2410 Camino Ramon <br /> San Ramon,CA 94583 <br /> April 11, 1994 P.O.Box 5004 <br /> San Ramon,CA 94583-0804 <br /> Marketing Department <br /> Ms. Mary Ways Phone 510 842 9500 <br /> San Joaquin County Environmental Health <br /> P.O. Box 2009 <br /> Stockton,CA 95201 <br /> Re: Chevron Station#9-4275, 2905 West Benjamin Holt Drive, Stockton, CA <br /> Attached additional assessment report(GTI,3/24/94) <br /> Dear Ms. Meays: <br /> Attached is a report dated March 24, 1994, which was prepared by Chevron's consultant, <br /> Groundwater Technology, Inc. (GTI), to describe the installation and sampling of one offsite <br /> groundwater monitoring well. This report also.contains the results of groundwater monitoring <br /> performed on January 18,1994. All soil and groundwater data presented in this report were <br /> previously reported in GTI's Problem Assessment Report and Feasibility Study dated March 16, <br /> 1994. <br /> The soil sample collected at the groundwater interface during the installation of well MW-8 was <br /> analyzed for the presence of TPHGas and BTEX constituents. No detectable concentrations of <br /> petroleum hydrocarbons were measured. <br /> All eight site-related groundwater monitoring wells were gauged and sampled on January 18, <br /> 1994. The measured direction of groundwater flow was generally toward the east. Five of the eight <br /> wells contained detectable levels of dissolved hydrocarbons. The measured concentrations were <br /> consistent with those detected during previous site monitoring events. The groundwater sample <br /> collected from well MW-8 contained 51.0 pplo TPHG. No other petroleum hydrocarbons were <br /> detected at this location. <br /> If you have any questions or comments, I can be reached at(510) 842-8695. <br /> Sincerely, <br /> Brett L. Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br /> 1 <br /> f-iaq:;yclab!tt <br />