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�- Engineers <br /> Planners <br /> Economists <br /> A$ k M <br /> arc 6,SC11mSfS <br /> i • 4 <br /> SF031604 .RP MAR 1 9 1992 <br /> ENVIft\tiIV!LV-iAL. ALTN <br /> Ms. Carol Oz PERMIT/SERVICES <br /> San Joaquin County Public Health Services <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> Subject: Underground pipe removal and investigation results <br /> for 110 N. Filbert Street, Stockton, California. <br /> Dear Ms. Oz: <br /> On January 21 and 22, 1992, underground piping associated with <br /> three former underground gasoline tanks was excavated and <br /> removed from Del Monte's 110 North Filbert property in <br /> Stockton, California (also known as the Disco property) . <br /> Please find enclosed the following required documents: <br /> • Analytical results (also mailed directly from the <br /> laboratory to PHS) . <br /> • Piping disposal receipt. <br /> • Waste manifest for rinsate water. <br /> The pipe excavation and soil sampling were performed according <br /> to the Permit Application (December 3, 1992) and the Amendment <br /> Letter (January 16, 1992) , both approved by PHS. The soil <br /> sampling was performed by Bern Baumgartner/CH2M HILL and <br /> observed by Ms. Carol Oz/PHS. <br /> The underground gasoline and water pipes associated with the <br /> former gasoline station were excavated by Peterson Engineering <br /> of Sacramento, California. <br /> Five soil samples were collected from the bottom of the pipe <br /> excavation trenches (SP-1 through SP-5) , approximately two <br /> feet below the excavated piping. Three soil samples were <br /> collected from the excavated soil piles (ES-1 through ES-3) <br /> (attached figure) . The attached table presents the analytical <br /> results of the soil samples. Total petroleum hydrocarbons as <br /> gasoline (TPH-gas) and benzene, toluene, ethyl benzene, and <br /> xylenes (BTEX) were nondetectable for all soil samples, except <br /> 0. 011 mg/kg of toluene in sample ES-3 . The lead level of <br /> CH2M HILL San Francisco Office 6425 Christie Avenue,Suite 500 415.652.2426 <br /> Emeryville,CA 94608 Fax 415.652.0482 <br />