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2.0 EXISTING ENVIRONMENTAL CONTROL <br /> AND MONITORING SYSTEMS <br /> 2.1 LANDFILL GAS CONTROL/MONITORING SYSTEM <br /> Currently, a portion of the existing Austin Road Landfill has an active landfill gas <br /> extraction system (LFGES). This system is utilized by Ogden Power Pacific, Inc. <br /> to operate an electrical generation plant located at the northwest corner of the <br /> site. The power plant utilizes enough LFG to produce up to 760 kilowatts per <br /> hour of electrical power. This energy is sold to Pacific Gas and Electric <br /> Company (PG&E) under a long-term agreement. The existing LFGES at the <br /> Austin Road Landfill is comprised of approximately 30 vertical extraction wells, <br /> which actively collect gas from the waste prism, and headers and lateral piping <br /> to convey this extracted LFG to the generation facility. Drawing 12 of the JTD <br /> shows the current landfill gas control system. The existing Forward Landfill does <br /> not have a LFGES. A LFGES will be designed, installed and operated at the <br /> combined landfill site, when necessary, to achieve compliance with Title 40 of <br /> the Code of Federal Regulations, Subpart WWW. At a minimum, the system will <br /> incorporate the following equipment: <br /> • Enclosed ground flare facility and/or energy recovery facility <br /> • Vertical extraction wells <br /> • Horizontal gas collectors <br /> • Condensate management system components <br /> The proposed LFGES layout for the future Forward Landfill is shown on Drawing <br /> 13 of the JTD. <br /> The current gas migration monitoring system at the Austin Road Landfill consists <br /> of 12 perimeter gas monitoring probes as shown on Drawing 12 of the JTD. The <br /> Forward Landfill gas migration control monitoring system consists of 10 <br /> perimeter gas monitoring probes. For the combined landfill, probes SGP-2A, <br /> SGP-38, GP-9, and GP-10 must be abandoned to accommodate the expansion <br /> between the two landfills. New multi-depth perimeter probes, if required in the <br /> future, will be installed to monitor and fulfill regulatory standards for subsurface <br /> ® migration, as required by applicable local, state, and federal regulations <br /> Forward Landfill PCPCMP 2-1 <br /> L:\Allied\2000.193\Reports\FinaIPCPCMP:FL-sec2.doc:5/21/02 BRYAN A.STIRRAT&ASSOCIATES <br />