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Mr. Doug Wilson, R.S . <br /> July 20 , 1987 <br /> Page 2 <br /> should also be collected at depth, beneath the spill site. A <br /> backhoe should be used to excavate the suspect soil . The excavated <br /> soil should be stockpiled on site and covered with sheet plastic. <br /> Efforts should be made to separate the potentially clean soil from <br /> the suspect soil . The disposal of the stockpiled soil would pend <br /> laboratory analysis of samples collected. <br /> The results of soil samples from the current stockpile indicated <br /> no detectable waste oil product. We, therefore, recommend that the <br /> current stockpile soil be used to backfill the recommended <br /> excavation, if the waste oil product is successfully removed. We <br /> also recommend that any remaining stockpile soil be distributed on <br /> the unpaved portions of the site. <br /> We would appreciate your prompt response to this letter. If you <br /> have any questions, comments, or suggestions in regards to the <br /> subject site, please contact me or Ms. Johanna Ambler at ( 916) <br /> 444-0123 . <br /> Very truly yours, <br /> BROWN AND CALD�W"ELL c <br /> Lawrence E. Phillips <br /> Project Manager <br /> LEP :JLA:der <br /> Enclosure <br /> cc/enc: Mr. Steve Welge, ARCO Petroleum Products Company, <br /> Fremont, California <br /> Mr. Hank Sheetz , ARCO Petroleum Products Company, <br /> San Mateo, California <br /> Ms. Karen Schultheis, ARCO Petroleum Products Company , <br /> San Mateo, California <br /> BROWN AND CALDWELL <br /> 723 S ST RE ET SACRAMENTO.CA 95614 • (916)444012:3 <br />