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y <br /> a s t 1 P.O. Box 576981-6981 <br /> M.J. Kloberdan. Associates Modesto, California 95357 <br /> Environmental Assessment Phone: (209) 577-8186 <br /> Fax: (209) 577-8158 <br /> August 25, 1999 <br /> Carol Oz 3 <br /> San Joaquin County <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> RE: <br /> REPORT <br /> Subsurface Soil and Groundwater Investigation <br /> Nulaid Foods, 337 E. 4th Street, Ripon, California <br /> 1 <br /> 1.0 PROJECT IDENTIFICATION k <br /> The following scope of work was conducted to help characterize the petroleum <br /> contamination disclosed during the underground tank removal at the above referenced <br /> property. A Geoprobe`� was used to obtain soil and ground water samples for the <br /> preliminary characterization of the vertical and lateral extent of contamination. <br /> 1.1 Site Description and History <br /> Two underground fuel tanks were removed on November 12, 1998 by SEMCO 1 <br /> under permit. Low levels of diesel and gasoline constituents were disclosed in <br /> laboratory soil samples, primarily in the area of Tank 2 (TK-2). (Figure 2). <br /> Table of Laborato Sam le Results (November 12, 1998) <br /> Sam le I.D. Gasoline I Diesel Benzene Toluene E-Benzene Xylenes Lead 8260 <br /> EKE(al <br /> 15' NA ND ND ND ND ND NANA <br /> 6' NA ND ND ND ND ND NA NA <br /> IS' ND 66< ND ND ND 9,2 9 ND <br /> 6' ND ND ND ND ND ND ND ND <br /> ND=Non Detect NA=Not Analyzed Diesel,Gasoline,&Lead units in mg/Kg BE'rX&MTBE ui pg/Kg <br /> 2.0 SCOPE OF WORK <br /> M. J. Kloberdanz & Associates drilled two soil borings to about 30 feet in depth. The <br /> boreholes were drilled in the vicinity of the former fuel tanks as depicted in the Figure 2 <br /> Site Map. Soil samples were obtained above groundwater and at the capillary zone near <br /> groundwater. A hydropunch device was pushed ahead of each boring termination depth <br /> to groundwater. Water was sampled in boring B-1 at 30 to 35 feet in depth and 34 to 37 <br /> feet in depth in boring B-2. Groundwater appeared to be about 3 to 4 feet deeper in <br /> II � <br /> i <br />