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Chevron v <br /> Chevron U.S.A. Inc. <br /> 2410 Camino Ramon, San Ramon, California•Phone (415) 842-9500 <br /> Mail Address:P0.Box 5004,San Ramon,CA 94583-0804 <br /> Marketing Department <br /> April 25, 1991 <br /> Ms. Diane Hinson <br /> San Joaquin County Environmental Health <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Former Chevron S.S. # 9-1918 <br /> 45 E. Harding Way, Stockton, CA <br /> Dear Ms. Hinson: <br /> Enclosed are two reports. The first report, dated March 25, 1991, documents the start-up and <br /> operation of the vapor extraction and treatment system(VETS)at the site referenced above. I have <br /> also instructed Chevron's consultant, EA Engineering, to send copies of future quarterly VETS <br /> monitoring reports to you when they are sent to the San Joaquin Air Pollution Control Board. As <br /> you can see from the report, remediation of the soils at the site has been effective in reducing the <br /> levels of volatile hydrocarbons present in the subsurface. <br /> The second report, dated April 1991, proposes the drilling of a bore hole in the vicinity of the <br /> former tank pit. The drilling of the bore hole will enable soil samples to be collected so that the <br /> remaining levels of hydrocarbons present in the soil can be determined. The bore hole will be <br /> developed into a groundwater monitoring well so that groundwater samples can be collected to <br /> determine if there if there are any dissolved hydrocarbons present in the groundwater beneath the <br /> site. <br /> Also enclosed is a check in the sum of$150 as now required by San Joaquin County for work plan <br /> review. Chevron's consultant has already sent a check in the sum of$89 for a well drilling permit <br /> as required. Also enclosed is a completed Authorization To Release/Billing Acknowledgement <br /> Form. <br /> The property owner is very interested in knowing what plans Chevron has for further monitoring <br /> and/or remediation so that he may proceed with his plans for this abandoned property. As this will <br /> depend on the results from the soil and groundwater sampling, Chevron would like to proceed <br /> with the drilling as soon as possible. The property owner and Chevron would appreciate your <br /> prompt review of the work plan and granting of the drilling permit. <br /> If you have any questions or comments, please contact me at(415) 842-8658 or Doug Oram at EA <br /> Engineering. <br /> Sincerely, <br /> z ptre� <br /> Clint B. Rogers <br /> Environmental Engineer <br />