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r k I 7 .li f ',771 _ i ; Draft Environmental Impact Report Page II-20 Forward Inc. Landfill Expansion liner and/or leachate • Maximum pre-loaded settlement of the combined landfill is projected to provide collection system of the the maximurn period for settlement, and take advantage of anticipated vertical expansion improvements in geosynthetic technology. portion of the combined landfill. • Future design for the vertical expansion will,if necessary, include additional components in the liner system, depending on future differential settlement on the liner system. • The appropriate responsible agencies,the CIWMB and RWQCB, shall conduct a review of the liner and leachate collection system for the vertical expansion over the existing landfill(s) proposed in the upcoming JTD update. This has for the most part been constructed. The design for the last part of it was approved this may and will be constructed this summer. No additional measures are required. F.6. A VOC- Proposed as Part of the Project: Less than contaminated plume Forward landfill has agreed to a short term and long term mitigation of the Significant extending northeast from supply wells at the NCYCC wells as described in the Herst(2008b) contingency the northern edge of the plan report prepared for the NCYCC. The short-term(in next six months) landfill border could solution is the use of activated carbon treatments units to clean the groundwater affect water quality in pumped from the supply well being used for all operation purposes, including offsite private wells. drinking water, at the NCYCC facility. Within six months, with a financial commitment by Forward,municipal piped water will be brought to the NCYCC and replace the current us of the supply wells; • The two private wells will continue to be supplied with bottled water;and • Because of the potential for contamination from WMU B and/or A of the shallow groundwater table downgradient and adjacent to the project,existing domestic off-site wells within 500 feet of the eastern property boundary will be sampled at the same frequency as the monitoring wells onsite and for the same constituents (see CCR,Title 27). Final determination of the sampling program and the evaluation of the test results, along with the appropriate mitigation, is