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SOIL EXCAVATM AND DISPOSAL WORMPLAN <br /> 32 Tokay Street Lodi Calrfornia <br /> 20 BACKGROUND <br /> 2 1 Site Location <br /> The site is located at the Pacific Coast Producers Lodi Cannery Plant on the north side <br /> of Warehouse #6, in an industrial area of Lodi, California <br /> 2 2 Site Description <br /> A 10,000-gallon diesel tank was reportedly removed from the site in 1987 The <br /> approximately 10-foot-wide by 35-foot-long by 15 to 20-foot-deep excavation was <br /> backfilled with a blend of previously-excavated sal and clean imported fill However, sal <br /> containing diesel fuel was noted in the excavation pit, prompting a request for <br /> investigation and remediation activities from the San ,Joaquin County Public Health <br /> Services Department, Environmental Health Division (County) The County requested <br /> removal of all soil containing greater than 100 ppm TPH, as diesel, and 0 005 ppm BTEX <br /> In 1991, five soil borings were drilled and sampled to depths of 20 feet below grade in the <br /> area of the former excavation (Figure 2) The borings were drilled to assess the vertical <br /> and lateral extent of soil containing petroleum hydrocarbons Four of the borings were <br /> drilled 5 feet from the former excavation on each of the four sides The fifth boring was <br /> drilled in the center of the former excavation Soil samples from depths ranging from 4 to <br /> 20 feet contained concentrations of TPH, as diesel, ranging from below detection lima <br /> (BDL) to 603 ppm Concentrations of BTEX ranged from BDL to 0 0483 ppm No <br /> hydrocarbons were detected in soil samples from the borings north and south of the <br /> excavation <br /> 3 0 WORKPLAN <br /> I3.1 Soil Characterization <br /> Previous soil sampling indicated significant TPH, as diesel, concentrations (greater than <br /> 100 ppm) to a depth of 5 feet below grade, and detectable TPH, as diesel, concentrations <br /> to a maximum depth of 15 feet, in both native soil and backfill material The extent of <br /> significant TPH concentrations in native soil north, south, and west of the excavation has <br /> been established (Figure 2) <br /> r <br /> 92-074A WPN 2 <br /> I <br />