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iLL-16-iM0 UU:29 H&M UH WHSIt- mul &A41,00 lu eo Austin Road Landfill Agenda Item July 21, 1993 Page 2 RroRoalLi Project This revision would permit the operator to i4crease the daily tonnage received at the site from 280 tons per day to 1200 tons per day. The hours of operation have changed from 6-30 am to 4:30 pm M-F, to 6:00 am to 3:00 pm M-F, and 6:00 am to 7:00 pm on Saturdays during April and May. In addition, a hazardous waste exclusion program has been implemented, and a landfill gas collection system and power plant have been installed at the site since the permit was last revised in 1983. Construction of a groundwater treatment plant will in in July of 1993. gjtg HistgMy - This facility began operations in the 1950s and was issued a Solid Waste Facilities Permit (.4UP) in 1977. The SWFP was subsequently revised in 1983. The 1977 SWFP allowed 605,796 cubic yards per year and the 1983 SXFP allowsZeO tons per day. Compliance ffistpME The site is currently operating under a --Notice and Order issued by the LEA on April 2, 1991, which cry addresses the need for a permit revision -andprovides the necessary terms and conditions for interim' operation. The terms an and conditions of the Notice and Order restrict the facility to 4D receive a nmximm of 700 tons per day and require the operator to el-' rrevise the SWFP. In addition, a separate order issued by the LEA ID equires the city of Stockton to test and to cease recirculating 10 P landfill gar, condensate to the disposal area by October 9, 1993 0 1®%_11 e Past CIWMB and LEA inspections have documented numerous violations for leachate control. Prior to 1991, violations for grading, and intermediate cover were also frequently documented The site has since been regraded and areas of inadequate intermediate cover have been repaired or replaced. Recent inspection reports have not documented any other violations of State Minimum Standards. Monitoring reports submitted to the Central Valley Regional Water Quality Control Board (CVRNQCB) first indicated a significant groundwater quality impact in January, 1989. The contamination was verified in March, 1989, and February, 1991. On November 1�-, 1992, the City of Stockton submitted a workpian to construct and operate an on-site water treatment plant to iemediate the existing problem as required by the CVRWQ(M order No. 90-:122. The CVWQCB approved the workplan on February 25, 1993. In addition, City of Stockton has recently awarded the aoiLtract and will begin construction of the groundwater treatment faqility in July, 1993, which is expected to be completed by October, 1993.