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R <br /> a divssion of <br /> ENVIRONMENTAL SOLUTIONS IAC®A <br /> May 21, 1999 <br /> Project 20F90-002.007 <br /> Mr. Harlan Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Street, Third Floor <br /> Stockton, California 96202 <br /> Re: Revised Soil Remediation Workplan for Disposal of Stockpiled Soil, A. Teichert & <br /> Son, Inc., 103 North E. Street, Stockton, California <br /> Dear Mr. Knoll: <br /> This letter is to convey the soil remediation workplan for the stockpiled soil generated <br /> during recent underground storage tank (UST) removal activities at the subject site. The <br /> USTs were removed by a licensed hazardous waste contractor on March 23, 1999. The <br /> three USTs all contained diesel and one of the three USTs was formerly used to store <br /> gasoline. <br /> Under the direction of Matthew Parker of the San Joaquin County Public Health Services, <br /> Environmental Health Division (SJCPHD/EHD), Pinnacle collected twenty-four <br /> stockpiled soil samples were collected from the soil excavated from the UST complex and <br /> dispensers. Samples were composited 2:1 for analysis for total petroleum hydrocarbons as <br /> gasoline (TPHG), as diesel (TPHD), benzene, toluene, ethylbenzene, and total xylenes <br /> (BTEX), and fuel oxygenates. <br /> Analytical Results <br /> Two of the twelve soil samples had detectable levels of MTBE ranging from 18 and 20 <br /> micrograms per kilogram (ppb). No other fuel oxygenates were detected. Diesel was <br /> detected in all twelve soil samples at levels ranging from 12 to 820 milligrams per <br /> kilogram (ppm). Gasoline was detected in seven of the twelve samples at low levels <br /> ranging from 1 to 5 ppm. No detectable levels of BTEX constituents were detected in any <br /> of the samples. Copies of the certified analytical reports are attached. <br /> CP`E ATEICHERTISTOCKTONIREPO RTSISTKNP 102.DOC-96Usg:1 <br /> 3939 Cambridge Road,Suite 220 Cameron Park,California 95682 (530)676-6864 (530)676-6885 Fax <br />