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f <br /> r <br /> INTERIM WORK PLAN <br /> June 1995 <br /> Stockton Plating, Inc. <br /> 632 South El Dorado Street <br /> Stockton, California <br /> 1.0. INTRODUCTION <br /> In accordance with the request of Mr Bob Huntley of Stockton Plating, Adi,anced <br /> GeoEnvironmental, Inc (AGE) has prepared this Interum Work Plan for the installation of 12 "direct <br /> push" penetrations at 632 South El Dorado Street in Stockton, California (the Site) A plan of the <br /> site and the proposed penetration locations is included in the "Invitation For Bid and Bid <br /> Specifications" (Attachment A) <br /> 2.0. BACKGROUND <br /> The site is located on north side of Scott Street, east of the El Dorado Street overpass Local land <br /> use in the immediate vicinity of the site is industrial, residential areas are located south of the site <br /> It is our understanding that two USTs were removed from the property The first UST contained <br /> leaded gasoline and was removed in 1986 The second UST contained unleaded gasoline and was <br /> removed in 1990 Petroleum hydrocarbons were detected in soil samples collected from beneath both <br /> USTs at the tunes of removal It is believed that a release of approximately 700 gallons of unleaded <br /> gasoline may have occurred from the second UST during a tank test performed in 1990 <br /> Six soil bonngs and,four ground water monitoring wells have been drilled and installed at the site <br /> Petroleum hydrocarbons were detected in soil samples from all six borings and two of the monitoring <br /> wells <br /> AGE performed quarterly ground water monitoring procedures at the site on 23 May 1995 <br /> Petroleum hydrocarbons were detected in ground water samples from three of the four monitoring <br /> wells during the May 1995 sampling event <br /> As of 23 May 1995, ground water at the site was at a depth of 39 feet below surface grade (bsg) <br /> Ground water flow direction is historically to the northeast <br /> 3.0. SCOPE OF WORK <br /> Further investigation is necessary to determine the extent of hydrocarbon impacted soil AGE <br /> . proposes to install a total of 12 probings at the site to deternune the extent of impacted soil Probings <br /> will be advanced using a Geoprobe, to depths of approximately 40 feet (ground water) <br />