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LIMITED SUBSURFACE EWESTIGATION <br /> June1995 <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 installed one Geoprobe penetration near the rebound area at the Lifetile facility located <br /> at 342 East Roth Road in Lathrop, California(the Site). The location of the site is illustrated in Figure <br /> 1. A plan of the site is illustrated in Figure 2. <br /> The purpose of this investigation was to asssess the lateral and vertical extent of soil contamination <br /> in the rebound area at the site. <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. PROCEDURES <br /> On 27 June 1995, one soil probing point was established at the site(Figure 1) utilizing a van-mounted <br /> Geoprobe 5400 soil probing machine. Several attempts were made to establish probings along the <br /> southern and northern portions of the rebound area. However, because of ground conditions(hard <br /> soil), the probings could not be advanced to depths greater than 6 to 12 inches. <br /> A probing attempt was made in a third area, approximately 20 feet west of the rebound area. The <br /> probing(B-1)was successfully advanced to a depth of 10 feet. Soil samples were collected at depths <br /> of 5 and 10 feet using a precleaned, 1.375-inch diameter, two-foot long, piston-type sampler(large <br />