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WORK PLAN FOR SUBSURFACE INVESTIGATION <br /> June 1995 <br /> Lifetile Facility- Rebound Area <br /> 342 East Roth Road <br /> Lathrop, California <br /> 1.0. INTRODUCTION <br /> In accordance with the request of Mr. Dan Johnson of Lifetile,Advanced GeoEnvironmental, Inc. <br /> (AGE) has prepared this Work Plan to perform a limited subsurface investigation of the rebound area <br /> at the Lifetile facility located at 342 East Roth Road in Lathrop, California (the Site). The location <br /> of the site is illustrated in Figure 1. A plan of the site is illustrated in Figure 2. <br /> 2.0. BACKGROUND <br /> Lifetile's Lathrop facility produces concrete-based roofing tiles for housing and industry. Diesel fuel <br /> is utilized in the manufacturing process. Unused or damaged tiles are placed near the southeast <br /> corner of the facility in the"rebound" area. The rebound is later recycled and reused off-site as road <br /> base. <br /> A soil sample was collected from the rebound area in February 1995 and analyzed by a State-certified <br /> laboratory for total petroleum hydrocarbons quantified as diesel. The sample was collected from a <br /> depth of approximately 18 inches. <br /> Laboratory analysis of the soil sample indicated that TPH-d (5,100 parts per million) is present in the <br /> immediate vicinity of the rebound area. <br /> 3.0. SCOPE OF WORK <br /> Further investigation is necessary to determine the extent of diesel impacted soil in the rebound area. <br /> AGE proposes to advance two"direct push" probings at the site to determine the extent of impacted <br /> soil. Probings will be advanced using a Geoprobe, to depths of approximately 10 feet. <br /> Soil samples will be collected from each probing at five-foot intervals. These samples will be field <br /> screened for organic vapors. Selected soil samples will be analyzed by a State-certified laboratory. <br /> If necessary, additional probings will be advanced to define the lateral and vertical extent of soil <br /> contamination. <br />