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ATTACHMENT B <br /> SCOPE OF SERVICES <br /> INDIAN RIVER COUNTY SOLID WASTE DISPOSAL DISTRICT <br /> CLASS I ACTIVE LANDFILL GAS EXTRACTION AND <br /> CONTROL DESIGN MODIFICATIONS <br /> INTRODUCTION <br /> Indian River County (IRC) is preparing for the construction of an active Landfill Gas (LFG) <br /> Extraction and Control System for the Class I Landfill. The LFG system will consist of gas wells <br /> installed into the waste and collection system of header pipes, which will convey the landfill gas <br /> to a flare station where it will be burned . <br /> The current Master Plan calls for the current Segment 1 portion of the landfill to have a final <br /> elevation about 45' higher than present. The Class 1 Segment 1 Landfill is currently closed with <br /> a clay cap and with passive gas vents installed into the waste . <br /> The purpose of this Landfill Gas Extraction and Control System Design Modification is to <br /> accommodate a vertical expansion of the Segment 1 Landfill . This will be done by providing <br /> connection points for a horizontal gas collection system to be designed and installed at some <br /> future time. Because there are existing landfill gas wells on top of Segment 1, additional <br /> modifications to these existing wells will be required for them to continue to operate during <br /> filling operations of the expansion. <br /> This scope reflects a significant effort to modify the design to accommodate a future system <br /> expansion, which would primarily use horizontal Landfill Gas Collectors in the Indian River <br /> County Landfill. In addition, this change makes it possible to design a landfill gas control <br /> system in the future, which will effectively collect gas from the vertical expansion area of <br /> Segment 1 . <br /> TASK 1 . 0 - LANDFILL GAS COLLECTION SYSTEM MODIFICATIONS <br /> The Landfill Gas Collection System design will be modified to serve the Landfill Gas Collection <br /> demands of a future landfill gas system expansion which will collect and extract landfill gas <br /> from the vertical expansion of Segment 1 of the Landfill. There are currently eight landfill gas <br /> wells, which passively vent gas on the top of Segment 1 . The current landfill gas collection <br /> system design uses lateral headers to connect these wells into a perimeter header, which then <br /> conveys the gas to a gas flare . <br /> CDM will design connection points along these lateral headers to allow for connection of future <br /> horizontal collectors to the existing vertical well network. <br /> B-1 mh1268 <br />