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PUBLI HEALTH SER ICES ,�P �a <br /> SAti'OAQUIN COUNTY <br /> 10U KHANNA.\(D Nt T H <br /> Htiich Officer ' <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton. California 95201 4� F 6 R� <br /> (209) 468-3.00 <br /> SAN JOAQUIN COUNTY <br /> GENERAL SERVICES <br /> 222 E WEBER ROOM 675 (C(apy <br /> STOCKTON CA 95202 <br /> RE: Stockton Airport REFER TO SITE CODE: 1845 <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 tank removal sites require further <br /> remediation according to the Leaking Underground Fuel Tank (LUFT) <br /> field manual. <br /> Tanks #1, #2, #3, #4, #5, and #6 <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 /> Tanks #8, #9, #10, #11, and #12 <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 /> 1100 ppm. TPH levels were as high as 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. TPH levels were as high as 13 , 000 ppm. <br /> A D1visKwi ofun Joaquin Giun[v Hculth Care Scmccs \/ <br />