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PUBLIC HEALTH SERVICES <br /> J061 KHANNA Nil),NUI 1-1 <br /> , PA)x 2 1601 East H 7It tie) 0 Stockton,CAifomja 95201 <br /> ( 0 468-3400 <br /> WERNER AERO SERVICE <br /> 6250 SOUTH LINDBERGH " 1 199 <br /> STOP 9520 - <br /> E: Stockton Airport REPLY TO SITE CODE: 1845 <br /> 5000 S. Airport Wad <br /> Stockton, CA 9520 <br /> Saxe Joaquin County Publici Services, Environmental Health <br /> Division; recently reviewed the analytical results <br /> f the soil samples taken from beneath the undergroundstorage <br /> tanks that were removed f1 this site during the periods of <br /> 1987-1990. <br /> Althoughthe laboratory results from each tank removal indicated <br /> no detection of volatile :organic hydrocarbons, the detection <br /> limits cannot be applied to current standards. (see chart below) <br /> Current standards, laboratory detection limits, and/or the site <br /> specific characteristics i.e. depth to seasonal high <br /> groundwater, nearby wells, septic' systems) make it impossible for <br /> PHS/EPHS/EHD to evaluate these tanks for closure. <br /> According to the Leaking Underground 11 Ebel Tank (LUFT field <br /> € (February 1989) detection limits for soil analysis are <br /> .005 ppm for volatile hydrocarbons and 10.0 ppm for total <br /> petroleum hydrocarbon. <br /> If site closure certification is necessary, /EHE would not be <br /> able to provide it without further investigation the <br /> undergroundstorage tank removal sites listed below. <br /> PUS/END is not, at this time, tiinvestigation of <br /> locations.these specific tank <br /> P-eltsesc-tli <br /> Benzene 005 ppm <br /> Tele .005 ppm <br /> Xylene_ m .015 Ppm <br /> " `erase o .`*un Joaquin County HvWt€Care Semces <br />