Laserfiche WebLink
Mr . Doug Wilson, R.S . <br /> October 1, 1987 <br /> Page 4 <br /> 113 constituent in samples TEA-2 and TEA-4 is below the California <br /> Regional Water Quality Control Board, Central Valley Region <br /> (Regional Board) designated level for the protection of groundwater <br /> quality (September 1986) . The benzene in soil sample TEA-3 was <br /> detectable, but below the Regional Board designated level for the <br /> protection of groundwater quality. All other constituents in these <br /> three samples were below detection limits. <br /> Soil sample TSP-4 , from the wast6 oil-stained stockpile, had <br /> detectable EPA 8015 , modified constituents in- the motor oil range. <br /> Soil sample TSP-5 from the visibly clean stockpile had detectable <br /> EPA 8015 , modified constituents in the motor oil range. Sample <br /> TSP-5 also had detectable pesticide constituents 4, 4 ' -DDD and <br /> methoxychlor . No designated level has yet been established for <br /> 4 , 4 ,-DDD. The methoxychlor constituent was below the Regional Board <br /> designated level for the protection of groundwater quality. All <br /> other constituents in these two samples were below detection limits. <br /> Based on these results, we recommend no additional excavation at the <br /> site . The waste oil product in the soil is detectable, but at <br /> levels which pose no immediate or long-term health threats. Both <br /> soil stockpiles should be removed and transported to a Class I <br /> landfill. Photocopies of the signed manifest for soil transport <br /> should be sent to San Joaquin County Local Health District, ARCO, <br /> and BC. <br /> Please review this report of our latest findings and conclusions , <br /> and inform us of any additional recommendations or requirements for <br /> the site . If you have any questions or comments, please contact <br /> Ms. Johanna Ambler. <br /> Very truly yours , <br /> BROWN AND CALDWETdfk <br /> �. <br /> Larry Phillips <br /> Project Manager <br /> LEP:JLA:mjd <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 /> Mr . Steve Welge, ARCO Petroleum Products Company, Fremont <br /> BROWN AND CALDWELL <br /> 723 S STREET SACRAMENTO,CA 95814 • (916)444 0123 <br />