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3 <br /> fiom each of the long sidewalls (north wall was ST-2G, K and south wall was ST-21, J) . <br /> The soil sampling was witnessed by Ms Diane Hinson from San Joaquin County Public <br /> Health Services Two of the 3 soil samples from the bottom of the excavation were reported <br /> to contain total extractable petroleum hydrocarbons below detection limits, and the thud soil <br /> sample was reported to contain 21 mg/kg total extractable petroleum hydrocarbons Wall <br /> sample ST-2G was reported to contain total extractable petroleum hydrocarbons of 3,300 <br /> mg/kg Removal of an additional l foot of soil from the area where sample ST-2G was <br /> collected revealed visually clean native material An additional soil sample was collected on <br /> November 15, 1990 following removal of the soil from the wall of the tank cavity <br /> 3 Several feet of soil containing elevated levels of petroleum hydrocarbons were also removed <br /> from below the remote fill pipe A soil sample was collected from the bottom of the <br /> excavated area (RF-B) The soil sample was reported to contain 120 ing/kg total extiactable <br /> petioleum hydiocai bons An additional 1 foot of soil was removed fiom the area of the <br /> foi mei remote fill pipe and a soil sample was collected on Novembei 15, 1990 <br /> 4 A soil sample was collected from the drscoloted sidewall in the 10,000-gallon wastewater <br /> tank cavity (ST-3D) The soil sample was reported to contain 3,000 mg/kg total extractable . <br /> petroleum hydrocarbons Xylenes were reported in concentrations of 0 1 Benzene, toluene <br /> and ethylbenzene were reported below detection limits of 0 0026 mg/kg The soil sample <br /> was also reported to contain 0 110 mg/kg PCBs (Aioclor 1254) <br /> 2.0 PROPOSED SCOPE OF WORK <br /> 2.1 ADDITIONAL SOIL REMOVAL ACTIVITIES <br /> 1 Soil samples collected from the bottom of the tank cavities were reported to contain petroleum <br /> hydrocarbons below detection limits Therefore, the tank excavations are being backfilled <br /> during the period of November 14 to 16, 1990 for safety reasons <br /> 2 Additional samples indicate soil containing elevated levels of petroleum hydrocarbons are <br /> present near the surface at the east end on the north side wall of the former 26,000-gallon <br /> tank cavity and along the north wall of the former 10,000-gallon tank cavity These soils will <br /> be removed following backfilling of the excavations 0 <br /> ENVIRONMENTAL SOLUTIONS <br />