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PUBUC HEALTH SERVICES Y" <br /> SAN JOAQUN Cot,N-1Y <br /> P.O. olds 1601 Eabt Hazelton Avenue) 5t 41 ton,Cartfomia 952011 <br /> (209)468-3400 <br /> CHEVRONUSA INC <br /> BOX 166 , MAR 17 1992- <br /> CONCORD <br /> RE: Stockton Airport REFER TO SITE CODE: 1845 <br /> 5000 S. Airport Way <br /> Stockton, CA 9520 <br /> San Joaquin County Public HealthServices, Environmental Health <br /> Division has recently reviewed the analytical results <br /> of the soil samples taken from n h the underground storage <br /> tanks that were removed from i site from 1987-1990 <br /> Current standards, laboratory detection limits, a your site <br /> specific characteristics (i.e. depth to seasonal high <br /> groundwater, nearbywells,_ septic systems) make it impossible for <br /> PHS/ERD to evaluate your site for closure. <br /> If site closure certification is necessary, PHS/EHD would not be <br /> able rove hoist further site investigation. As listed <br /> below, 14 undergroundstorage tank removal sites require further <br /> rezediation according the Leaking Underground Fuel. Tank (LUFT) <br /> field manual. <br /> Six 25,000 gallon fuel tanks removed February 15, 1990 <br /> thru February , 1990, removed from the Airport Tank Farm <br /> next erg Nastalgia Hanger on Dixon Road. Xylene levels <br /> in this pit were as as 400 ppm. Total petroleum <br /> hydrocarbon lever were as high as 2300 ppm.- <br /> Five gallon fuel tanks removed February 22 1988 <br /> thru February 26, 1988, removed from the Airport Tank Farm <br /> on Dixon Road. Toluene levels in this pit were as high as <br /> 11 2700 ppm. <br /> Three - 550 gallon tanks removed on March 8, 1990 from the <br /> Airport Tank Farm. Xylene levels in this pit were as high <br /> as 350 ppm. TPH levels were as high as 13,000 <br />