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S 0 <br />SANAOAQUIN <br />COUNTY <br />Greatness grows here <br />• <br />44CN% <br />Wowns for You <br />TO: Robert McClellon, REHS <br />Program Coordinator <br />Environmental Health Department <br />1868 E. Hazelton Avenue <br />Stockton, CA 95205-6232 <br />C <br />Department of Public Works <br />Kris Balaji, Director of Public Works <br />Fritz Buchman, Deputy Director/Development <br />Michael Selling, Deputy Director/Engineering <br />Jim Stone, Deputy Director/Operations <br />Najee Zarif, Interim Business Administrator <br />DATE: July 6, 2017 <br />SUBJECT: SECOND QUARTER 2017 <br />LANDFILL GAS MIGRATION <br />MONITORING DATA <br />TRANSMITTED HEREWITH: X <br />UNDER SEPARATE COVER: <br />No. of Copies Description <br />1 SECOND QUARTER 2017 GAS MIGRATION REPORT FOR <br />CORRAL HOLLOW, FOOTHILL, HARNEY LANE AND <br />NORTH COUNTY SANITARY LANDFILLS <br />Please find attached, the Landfill Gas (LFG) migration monitoring data at Corral Hollow, <br />Foothill, Harney Lane and North County Sanitary Landfills. The concentration of <br />Methane gas at each landfill was below 1.25 percent by volume for on-site structures in <br />accordance with California Code of Regulations Title 27, Article 6. For the perimeter <br />migration monitoring wells, the concentration of methane gas at each landfill was below <br />5 percent by volume, except for the Harney Lane Sanitary Landfill gas well No. 4. The <br />County is performing corrective actions to address the issue at GW -04 at Harney Lane. <br />If you have any questions or concerns, please contact me at 953-7316. <br />TAJ M. BAHADORI, PE <br />Senior Engineer <br />TMB:sc <br />N:\2AIISites\LFG Perim Mig Monit\2017\2nd Quarter - All Sites\2017-07-06 All Sites 2nd Qtr 2017 LFG Mig Transmittal.doc <br />Enclosures <br />