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2.0 EXISTING ENVIRONMENTAL CONTROL <br />0 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 vetiftal extmaction 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 -313, SGP -4A, GP -9, and GP -10 must be abandoned to accommodate the <br />expansion between the two landfills. New multi -depth perimeter probes, if <br />required in the future, will be installed to monitor and fulfill regulatory standards <br />for subsurface migration, as required by applicable local, state, and federal <br />Forward Landfill PCPCMP 2-1 <br />L:\Allied\2000.193\Reports\FinaIPCPCMP:FL-sec2:8/22/01 BRYAN A. STIRRAT 6 ASSOCIATES <br />