COMPLIANCE INFO_1991-1997 - Laserfiche WebLink

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WASTE DISCHARGE REQUIREMENTS FOR CITY OF STOCKTON AUSTIN ROAD LANDFILL FACILITY CLASS III LANDFILL SAN JOAQUIN COUNTY 15. The City has accepted, on a one time basis, approximately 20.000 cubic yards of digested sewage sludge from the City's wastewater treatment plant, and will accept approximately 5,000 cubic yards of this sludge on a yearly basis. The sludge is currently being stockpiled at the landfill. The sludge may be used in the foundation layer of the final cover. 3 16. The Discharger has submitted a Draft Environmental Impact Report for the proposed Landfill Expansion Project dated December 1993. Under the proposed project the landfill would expand horizontally by 218.5 acres providing approximately 48 years of additional landfill capacity, accepting an average of about 1.160 cubic yards of waste per day. These WDRs limit waste discharge to the existing landfill area. Revised WDRs are required for the proposed expansion area. 17. The Discharger has implemented a periodic load checking program which consists of daily random checks of incomingloads. Signs, prenotification programs, and procedures for handling identified hazardous wastes have also been developed. 18. A Solid Waste Assessment Test and Verification Monitoring Plan. dated June 1989, was submitted for the landfill. The report showed that there had been a significant water quality impact at the downgradient ground water monitoring wells MW -1 and MW -4. Volatile organic compounds (VOCs) were found in the downgradient wells, and were confirmed with further sampling. Supplemental sampling results indicated that VOCs were detected in California Youth Authority (CYA) wells CYA-1 and CYA-2 at levels equal to or slightly above action levels, and in a private well at 8106A Austin Road. However, confirmation sampling results did not detect any VOCs at either of the CYA wells. Further sampling at the private well at 8106A Austin Road did detect VOCs. 19. A verification (evaluation) monitoring program was implemented in three phases to determine the vertical and horizontal extent of contamination. Phases I and 11 confirmed VOC impact along the entire downgradient edge of the landfill and in the first encountered water bearing zone. In April 1991. Phase III indicated the chlorinated hydrocarbon impacted ground water extends laterally as far as 1,000 feet downgradient of the edge of the landfill and that the second water bearing zone beneath the landfill did not appear to have been impacted. 20. The extent of the contamination is suspected to be extended by a recent finding of VOC contamination in an agricultural well located on CYA property adjacent to Austin Road approximately 3,750 feet downdradient of the landfill.