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Mr . Harlan Knoll <br /> October 15 , 1987 <br /> Page 5 <br /> The laboratory results of soil sample 99H-1 indicate no detectable <br /> EPA 8010 , EPA 8015 , modified, EPA 8020 , or EPA 8080 constituents . <br /> The soil beneath and around the waste oil tank is free of waste oil <br /> product. <br /> Based on these results, we recommend that the excavation remain <br /> backfilled . The surface of the excavation should be sealed with an <br /> asphalt cover . No further investigative work is necessary at the <br /> site. <br /> Please review this report and comfirm, in writing , our recom- <br /> mendations for the site . If you have any questions or comments <br /> regarding the subject site , please contact me at (916) 444-0123. <br /> Very truly yours, <br /> BROWN AND CALDWELL <br /> Johanna L. Ambler awrence E. Phillips <br /> Project Manager Registered Geologist #3710 <br /> JLA:LEP:mrp <br /> Enclosure <br /> cc/enc: Ms. Karen Schultheis , ARCO Petroleum Products Company, <br /> San Mateo <br /> Mr . Hank Sheetz , ARCO Petroleum Products Company, <br /> Pleasanton <br /> BROWN AND CALDWELL <br /> 723 S STREET SACRAMENTO CA 95814 • (916)444-0123 <br />