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t eOLOgiC Associates <br />Geologists, Hydrogeologists and Engineers <br />July 7, 2005 <br />Job No. 2005-082 <br />Forward <br />9999 S. Austin Road <br />Manteca, California 95336 <br />Attention: Mr. Lochlin Caffey <br />WORKPLAN FOR MONITORING THE FINAL COVER SOILS <br />AT THE FORWARD SANITARY LANDFILL — NORTH & NORTHWEST <br />SLOPES FINAL COVER AREAS <br />SAN JOAQUIN COUNTY, CALIFORNIA <br />INTRODUCTION <br />Geo -Logic Associates is pleased to provide Allied Waste Industries, Inc. (AWI) with this <br />workplan for ET cover moisture monitoring at the Forward Landfill (North and <br />Northwest Slopes) in San Joaquin County, California. This written workplan has been <br />developed to identify the work to be performed to monitor the final cover in accordance <br />with the specifications of the most recent Partial Final Closure and Post -Closure <br />Maintenance Plans (BAS, 2005) prepared in support of closure of the stage IA area. <br />PURPOSE <br />The purpose for monitoring the final cover is to generate technical data to facilitate <br />evaluation by governing regulatory agencies on whether the landfill final cover meets the <br />performance standards established for closure of solid waste facilities in the State of <br />California. <br />The final closure of a municipal solid waste landfill is currently under the regulatory <br />authority of several federal, state, and local agencies that have different performance <br />standards. In California, the primary governing agencies for municipal solid waste <br />-disposal include the U.S. EPA, the California Integrated Waste Management Board <br />(CIWMB), the California Water Resources Control Board (CWRCB), the Regional Water <br />Quality Control Boards (RWQCB), local enforcement agencies (LEA), and the various <br />divisions of the California Air Resources Control Board (CARCB). With the exception <br />of the Air Resources Board, these agencies are concerned, at least in part, with the <br />potential for environmental damage that could result from the percolation of liquids into <br />an operating and/or closed solid waste facility. <br />It is in response to this concern for leachate generation and potential environmental <br />contamination that current regulations and standards of practice require that solid waste <br />facilities install an engineered final cover at the end of their operating life. As currently <br />1360 Valley Vista Dr., Suite 100, Diamond Bar, CA 91765 Phone: (909) 860-3448 FAX: (909) 860-2024 <br />