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0 • <br /> Permitting and Enforcement Committee Agenda Item- <br /> January 15, 1998 <br /> Proposed Project <br /> The proposed project is to allow for the following changes in design and operation: <br /> ➢ Expand the site acreage from 180 acres to 299 acres, with a total disposal footprint of 218 <br /> acres; <br /> ➢ Increase the maximum final elevation from 90 feet mean sea level to 150 feet mean sea <br /> level; <br /> ➢ Authorize the nonexperimental use of alternative daily cover in lieu of earthen material, <br /> as approved by the enforcement agency; <br /> ➢ Utilize a portable chemical storage locker for the temporary storage of household <br /> hazardous waste recovered through the load check program. <br /> Site History <br /> The Austin Road Landfill has been in operation since the 1950s. The facility was issued its first <br /> Solid Waste Facility Permit(SWFP) in 1977,which was subsequently revised in 1983 and 1993. <br /> The 1993 SWFP authorizes landfilling on 135 acres of the 180 acre facility with a peak loading <br /> of 1200 tons per day. The Board became the enforcement agency for the City of Stockton in <br /> October 1996. <br /> The existing permitted area(referred to as LF-1) is expected to reach capacity within the next <br /> five years. To address its long-term disposal needs, the City proposes to expand the landfill in <br /> six sequential phases. The horizontal expansion (Phases I-IV) will occur south of LF-1,while <br /> the vertical expansion(Phases V-VI) will be atop Phases I-IV and LF-1. Upon the final <br /> shipment of waste to LF-I, it will be closed in accordance with applicable requirements. The <br /> vertical expansion will occur on top of LF-I, only after it has been closed and Phases I-IV reach <br /> pre-designed grades. All future phases of the facility will be designed and constructed with a <br /> liner and leachate collection and removal system. Prior to constructing Phases I-IV, Littlejohns <br /> Creek will be realigned to the north of LF-I. <br /> The facility is equipped with a landfill gas extraction system, which conveys landfill gas to an <br /> on-site cogeneration facility. Electricity generated is sold to Pacific Gas and Electric Company. <br /> The operator has implemented a Corrective Action Plan(CAP) in accordance with Regional <br /> Water Quality Control Board (RWQCB)requirements. The CAP consists of a groundwater <br /> extraction system designed to reduce the off-site migration of chlorinated hydrocarbons. The <br /> two groundwater extraction wells have a combined design capacity to extract 305 gallons per <br /> minute. Volatile organic compounds are stripped from the extracted water and the treated water <br /> is discharged to Littlejohn Creek. The City continues to work with the RWQCB to address <br /> groundwater contamination issues. <br /> Page tr-2 <br />