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EXHIBIT C— LFG SYSTEM OPERATIONS SCOPE <br /> General <br /> Ameresco will operate the LFG collection system in accordance with the APC© Permit and <br /> other applicable regulations. <br /> Well Field Adjustment <br /> Ameresco will adjust the wells at least once each month. <br /> Wells shall be adjusted for methane content greater than 38 percent, if possible using <br /> Reasonable Industry Practice. If the methane content cannot be maintained above that level, <br /> then Ameresco will reduce the vacuum applied to that well to the minimum vacuum <br /> measureable by the instruments used. <br /> Subject to the previous paragraph, Ameresco will establish "deadband"adjustment criteria for <br /> the LFG wells. The deadband range of methane concentration measured at the individual wells <br /> will be used for individual well adjustments as follows: <br /> 1. If the methane concentration is greater than the deadband range, then Ameresco shall <br /> increase applied vacuum by an amount chosen by Ameresco. <br /> 2. If the methane concentration is less than the deadband range, then Ameresco shall <br /> decrease applied vacuum by an amount chosen by Ameresco. <br /> 3. If the methane concentration is equal to the greatest or least deadband range <br /> concentrations, or within the dead band concentration range, then Ameresco shall not <br /> adjust the well. <br /> Other adjustment criteria may be applied by Ameresco. <br /> Ameresco will modify LFG well adjustment criteria at the request of County if such adjustments <br /> are necessary to comply with applicable regulations or permit requirements Ameresco may <br /> propose alternate adjustment methods to County, the approval of which shall not be <br /> unreasonably withheld. <br /> Reporting <br /> Ameresco shall communicate the deadband criteria in writing, identifying the deadband <br /> methane concentrations and corresponding adjustments to the County for its records. <br /> Ameresco will submit to County monthly LFG field adjustment reports to allow County to comply <br /> with regulatory reporting requirements. These reports will include: <br /> 1. At each well: Methane, carbon dioxide and oxygen content, temperature, and applied <br /> vacuum before and after adjustment. <br /> LFG Purchase Agreement 9 <br /> Foothill Sanitary Landfill <br /> Ameresco San Joaquin LLC/San Joaquin County <br /> SW-1013035-136 <br />