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Mr. Kevin Basso is -2 - 18 May 1999 The schedule for filling WMU B covers approximately two years from the summer of 1999 to the summer of 2001. The schedule includes a provision to allow final cover construction to start a year later, possibly as late as 2002. I would prefer to see final cover placement started no later than the 2001 construction season and sooner if the unit is filled earlier. Forward should ensure that final partial closure plans and regulatory approvals are in place to accommodate this expedited schedule. If waste discharge rates slow down and WMU B is not filled by the summer of 2001, we can discuss alternative closure schedules at that time. The goal,however, remains to fill WMU B and place final cover as quickly as feasible. In summary,please submit new grading plans by 1 July 1999 that show how WMU B and the adjacent Class II units will be filled. The grading pans should show details of the boundary between the nonhazardous solid waste, designated waste, and the existing interface liner system. The grading plans should also be consistent with the preliminary and/or final closure plans for the exterior slopes. A partial final closure plans should also be submitted to fulfill the requirements of Title 27. Since these final plans should be submitted to the agencies two years prior to closure construction,the plans should be submitted as soon as practical, but no later than 1 September 1999. The plans should include the appropriate stability calculations and any revisions required by the WMU B fill plan. Forward may start:waste discharge operations in WMU B now, but you should ensure that fill is placed in a manner consistent with the conceptual fill plan and the modifications imposed above. The California Integrated Waste Management Board may have additional requirements and you should contact that agency prior to filling WMU B. If you have any questions,please call me at(916) 255-3131. STEVE E. ROSENBAUM Associate Engineering Geologist` SER cc: Mr. Tim Crist, California Integrated Waste Management Board, Sacramento Mr. Ed Padilla, San Joaquin County Public Health Services, Stockton Mr. Pete Keller,Allied Waste, Scottsdale Ms. Sangeeta Lewis, Lewis Engineering, Piedmont SER:WMU B Plan 5.99