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ACTON • MICKELSON • van DAM, INC. <br /> - -- --- Consulting Scientists, Engineers, and Geologists <br /> 5090 Robert J. Mathews Parkway, #4 (916) 939-7550 <br /> El Dorado Hills, California 95762 MM EMFax (916) 939-7570 <br /> j� U � <br /> SEP 0 ? 1992 <br /> 9NVIRONMENTAL HEALTH <br /> August 19, 1992 PERMIT/SeRvigo <br /> Mr. Randall K. Stephenson <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93230 ULT12.02 <br /> Subject: Executive Summary--Soil Management and Remediation Work Plan <br /> Beacon Station #474, 3440 East Main Street, Stockton, California <br /> Dear Mr. Stephenson: <br /> . Acton • Mickelson • van Dam, Inc. (AMV), has been authorized by Ultrarnar Inc. (Ultramar) <br /> to prepare a soil management plan for handling of soil generated during the removal of three <br /> existing underground storage tanks and possible overexcavation of soil if conditions warrant. <br /> A copy of the soil management plan is enclosed. Excavated soil will be stockpiled on site, <br /> sampled, and transported to an appropriate landfill. <br /> Previous work at the subject site has included advancement of three soil borings on site. Of the <br /> nine soil samples collected from three borings, seven contained measurable amounts of <br /> petroleum hydrocarbon constituents, benzene, toluene, ethylbenzene, or xylenes (BTEX). .None <br /> of the soil samples contained over 0.13 part per million (ppm) of any of the constituents <br /> sampled. Only one soil sample, collected 35.5 feet below grade in soil boring SB-3, contained <br /> measurable amounts of benzene (0.022 ppm) and only one soil sample, collected 45.5 feet below <br /> grade in soil boring SB-2, contained measurable amounts of total petroleum hydrocarbons as <br /> gasoline (TPHg) (6.3 ppm). <br /> Soil samples will be collected from beneath product lines and tanks as specified in the <br /> Tri-Regional Guidelines and analyzed by the methods outlined in the Tri-Regional Guidelines. <br /> All soil stockpiled on site will be covered with visqueen and secured. <br /> San Joaquin County will be properly notified prior to commencement of work and kept informed <br /> as new information (i.e., soil sample results) is obtained. It is our understanding that Ultramar <br /> anticipates performing fieldwork late in the third quarter or early in the fourth quarter of 1992. <br />