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FEASIBILITY PILOT TESTS WORK PLAN <br /> LARRY'S AUTO REPAIR <br /> 308 North Grant Street <br /> Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr. Charles Skobrak,Advanced GcoEnvironmental, Inc. (AGE) has prepared this <br /> Work Plan for the installation of additional wells and performance of a soil vapor extraction (S VE) <br /> and in-situ air sparging (IAS) pilot test and a ground water extraction pilot test at the subject <br /> property. <br /> This scope of work is being performed in accordance with San Joaquin County Public Health <br /> Department - Environmental Health Division (PHS-EHD) and Central Valley Regional Water <br /> Quality Control Board guidelines for the investigation of underground storage tank(UST) sites. <br /> 2.0. BACKGROUND <br /> The site is located on the northeast corner of the intersection of Grant Street and Miner Avenue <br /> (Figure 1 -Location Map). The site is currently operated as Larry's Auto Repair and was formerly <br /> operated as De Rollo Mazda. The property is occupied by a single building with attached canopy and <br /> a parking area(Figure 2 - Site Plan). <br /> In 1987, one 1,000-gallon gasoline underground storage tank (Tank A) was removed from the <br /> northwestern corner of the site. One 1,000-gallon gasoline UST and one 1,000-gallon diesel UST <br /> (Tanks B & C) were removed from beneath the sidewalk at the southeastern comer of the site in <br /> 1990. Petroleum hydrocarbons were detected in soil samples collected beneath each UST. <br /> Five ground water monitoring wells, four soil vapor extraction wells and three additional soil borings <br /> have been installed at the site. Primarily silty clay and clayey silt with sand lenses were encountered <br /> during drilling. Organic vapor and petroleum hydrocarbons were detected in soil samples collected <br /> from each boring. Due to rising ground water, all monitoring wells and several vapor wells are <br /> currently drown. <br /> Performance of feasibility studies are necessary to determine remedial action options for the site. <br /> Additional wells are required to assess the extent of impacted ground water beneath the site. <br /> Background information and site history are summarized in the Quarterly Report -August 1997, <br /> prepared by AGE. <br /> 3.0. SCOPE OF WORK <br /> Four ground water monitoring wells and one dual-completed ground water and soil vapor extraction <br /> well will be installed at and near the subject property. A soil vapor extraction (SVE) and in-situ air <br /> Advanced GwEnvironmental,Inc. <br /> t <br />