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PUBLIC HEALTH SERVICES <br /> SAN JOAQ[I"IN COL-NTY % <br /> T\ <br /> j('Xj1 KHANNA.MP,M,P 14 <br /> Htiith Offiter <br /> Ro, Box 2009# (1601 East Hazelton Avenue) 0 Stockton, California 95201 <br /> (209)468-3400 <br /> `7 <br /> H VALLEY FLYING SERVICE <br /> P 0 BOX 3780 <br /> HEMET CA 92343 MAR 17 1992 <br /> RE: Stockton Airport REFER TO SITE CODE: 184S <br /> 5000 S. Airport Way <br /> Stockton, CA 95206 <br /> San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS/EHD) has recently reviewed the analytical results <br /> of the soil samples taken from beneath the underground storage <br /> tanks that were removed from this site from 1987-1990. <br /> Current standards, laboratory detection limits, and/or your site <br /> specific characteristics (i.e. depth to seasonal high <br /> groundwater, nearby wells, septic systems) make it impossible for <br /> PHS/EHD to evaluate your site for closure. <br /> If site closure certification is necessary, PHS/EHD would not be <br /> able to provide it without further site investigation. As listed <br /> below, 14 underground storage to removal sites require further <br /> remediation according to the Leaking Underground Fuel Tank (LUFT) <br /> field manual. <br /> Six - 25,000 gallon fuel tanks removed February 15, 1990 <br /> thru February 28, 1990, removed from the Airport Tank Farm <br /> next to Aero Nastalgia Hanger on Dixon Road. Xylene levels <br /> in this pit were as high as 400 ppm. Total petroleum <br /> hydrocarbon (TPH) levels were as high as 2300 ppm. <br /> Five - 25,000 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 /> Iloo ppm. TPH levels were as highus 2700 ppm. <br /> Tanks #21, #22 and #23 <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. "SPH levels were as high as 13,000 ppm. <br /> A Divismn of iOA J02qUin CAM MY Hculth Cmt ICO <br />