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4 <br />the associated stockpile (Stockpile 2) was reported to contain total extractable petroleum <br />hydrocarbons of 640 mg/kg. The soil sample from below the remote fill line (RE) was <br />reported to contain total extractable petroleum hydrocarbons of 3,500 mg/kg and xylenes of <br />0.034 mg/kg. A soil sample collected approximately 6 feet below former tank bottom <br />(ST-2D) was reported to contain total extractable petroleum hydrocarbons below detection <br />limits. <br />The soil samples from below the former 10,000-gallon wastewater tank (ST-3A, B) were <br />reported below detection limits for total extractable petroleum hydrocarbons, BTEX, <br />chlorinated hydrocarbons, and PCBs. The soil sample from the associated stockpile <br />(Stockpile 3) was reported to contain total extractable petroleum hydrocarbons of <br />22 mg/kg, and PCBs of 0.095 mg/kg. B .1..EX and chlorinated hydrocarbons were reported <br />below detection limits. Discoloration of the soils was noted on the north wall of the tank <br />cavity following removal of the tank. <br />The soil samples from below the former 2,000-gallon gasoline tank (ST-1A, B) and from the <br />associated stockpile (Stockpile 1) were reported to contain 1.4 mg/kg total petroleum <br />hydrocarbons as gasoline. BTEX, tetraethyl lead and ethylene dibromide were reported <br />below detection limits of 0.0024, 6.0 and 0.0006 mg/kg, respectively. <br />5.0 ADDITIONAL WORK <br />1. Due to the presence of elevated levels of petroleum hydrocarbons in the soils beneath the <br />former underground storage tanks, additional soils investigation and removal activities were <br />completed and a final report is being prepared. The additional activities were performed <br />under the review of Ms. Diane Hinson of San Joaquin County. <br />ENVIRONMENTAL SOLUTIONS