COMPLIANCE INFO_1989-1996 - Laserfiche WebLink

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City of Stockton Austin Rd. Landfill Diesel Spill acted as an impermeable layer and prevented the diesel fuel from migrating beneath the depth of the asphalt. On August 28, a backhoe was used to excavate an estimated 25 cubic yards of contaminated soil from the three locations. The excavated soil was screened using a hand held photoionization detector (PID) . Upon completion of excavation activities, the PID and personal observation were used to confirm that all required excavation had been completed. All PID reading of the residual, native soil in the excavation areas were non-detect, and there was no odors emanating from the excavation. The excavations were then backfilled with clean Roadbase that had been obtained by Forward staff. Excavated soil was immediately transported to the nearby Forward, Inc. Landfill, and stockpiled in Waste Management Area G of that Landfill. All excavation activities were performed under the observation and supervision of Ms. Resch and an engineer from the City of Stockton. On August 28, 1991 Forward staff took two soil samples from the excavated soil stockpiled at WMA-G at the Forward Landfill. The samples were taken from portions of the stockpile where the diesel odor was most pungent. The samples were composited into one sample and submitted under strict chain-of-custody to FGL Analytical Services, Stockton, California. The sample was analyzed for Total Petroleum Hydrocarbons as diesel (TPH (d) ) . Lab results yielded TPH(d) results of 26 Parts Per Million (PPM) . At this concentration, Forward Landfill is permitted to directly dispose of the soil in one its waste disposal units. Permission was granted by Greg Oliveira of PHS to proceed with appropriate disposal of the stockpiled soil, under regulatory approval no. 91-121. Regulatory officials have indicated that they consider the release incident closed and the contamination to have been remediated. Please call me if you have any questions. 2