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Oemn . <br /> %rctievron. <br /> . - y <br /> this location near the source-area. <br /> A recent review of.Chevron internal records-has:revealed the occurrence of two separate:product <br /> line test failures (12184 and 5185). No'information-was available which would identify-the location <br /> of the line failures or the amounts {if`any) ofproduct released. Records indicated that the lines <br /> (regular and unleaded).were both replaced in'June,-1985.There,was'also-mention in the records <br /> that the product lines were removed in Ja'n'uary,, 1987 -during tank removal activities .and <br /> subsequently salvaged by the. same construction company who perforriied the tank removal <br /> operations. <br /> Based on the above information and,on the-SJCPHS'suspicion,that the product lines may still be in <br /> place, proposed soil boring SB-3 has been located to confirm the removal:of-the former product <br /> lines and to determine the extent of any hydrocarbon contamination to the soil or groundwater that <br /> may have occurred as a result of any product-line release. <br /> In addressing the.request for a mass balance evaluation to estimate the original source volume, it is <br /> .felt that any volume estimate performed.with-the'data:available would be grossly inaccurate. Data. <br /> of this type may be useful in evaluating the efficiency of remediation activity however, Chevron' <br /> does not feel that soil or groundwater'remediation is necessary at this site. <br /> Hopefully;this information addresses all,concerns raised by_SJCPHS in their letter dated,January <br /> 11; 1993. The..work proposed-in this work plan will be's6e'duled.as soon as your response is <br /> received. <br /> If you have any questions or comments;I can be reachedat(5 10) 842-8695. <br /> Sincerely, <br /> Brett L. Hunter <br /> _Environmental Engineer <br /> -Site Assessment and Remediation <br /> Attachment <br /> ec- Elizabeth Thayer,Central Valley Regional Water Quality Control Board, Sacramento; CA <br /> Joe Mattos, 724 North First Street, San Jose; CA 95112 <br /> Bruce Eppler, GTI, Sacramento,.CA (w/o attachment) <br /> Recycled <br />