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• 3 <br /> from each of the long; sidewalls (north wall was ST-2G, K and south wall was ST-2I, 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 fiorn the bottom of the excavation were reported <br /> to contain total extractable petroleurn hydrocarbons below detection limits, and the third soil <br /> sample was reported to contain 21 mg/kg total extractablc petroleum hydrocar bons Wall <br /> sample ST-2G was iepoited to contain total extractable petroleum hydrocarbons of 3,300 <br /> mg/kg; RemovA of an additional 1 toot of soil from the area where sample ST-2G was <br /> collected revealed visually c lean native material An additional soil Sample was collected on <br /> November 15, 1990 following; icn-roval of the soil fiorn the wall of the tank cavity <br /> 3 Several feet of soil containing elevated levels of petroleum hydrocarbons were also icinoved <br /> from below the remote fill pipe A soil sample was collected fiorn the bottom of the <br /> excavated aic;a (RF-B) The soil Sample was reported to contain 120 ing/i:g; total extractabic <br /> petroleum hydioc,aibow, An additional I toot of soil was iernoved fiom the area of the <br /> foirner remote fill pipe and a soil sample was collected on November 15, 1990 <br /> 4 A soil sample was collected from the dis,-oloied sidewall in the 10,000-gallon wastewater <br /> tank cavity (ST-313) The soil sample was reported to coizt,3rn 3,000 mg/kg total extractable <br /> petroleum hydrocarbons Xyleiies were reported in concei.L:trans of 0 I Benzene, toluene <br /> and ethylbenzene were reported below detection limits of 0 0026 mg/kg Tire soil sample <br /> was also reporters to contain 0 110 mg/kg PCBs (Aiocloi 1254) <br /> 2.0 PROPOSED SCOPE OF WORK <br /> 2 1 ADDITIONAL SOIL REMOVAL ACTIVITIES <br /> I Sort samples collected fiorn the bottom of the tank cavities were reported to contain petroleum <br /> hycirocarbons below detection limits Theretore, the tank excavations are being backfilled <br /> during; the per tod of November 14 to 16, 1990 for safety reasons <br /> 2 Additional samples indicate soil containing elevated levels of petioleum 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 <br /> ENVIRONMENTAL SOLUTIONS <br />