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Draft Supplemental Environmental Impact Report Page II-25 Forward Inc.Landfill 2014 Expansion Project could result if a liner and the existing Class III cells similar to the liner and LCRS that has been and/or leachate designed, constructed, and approved by the RWQCB for the existing collection system is not Forward Landfill. provided at the interface . Because the liner and LCRS would be constructed on a refuse surface,the of the new landfill areas liner and LCRS design would account for differential settlements of the with existing,unlined or underlying refuse. non-Subtitle D lined, Class III portions of the • The appropriate responsible agencies, CalRecycle and the RWQCB,shall landfill. conduct a review of the liner and leachate collection system for the interface liner and LCRS in the upcoming JTD update. F.6. The project could Proposed as Part of the Project. Less than potentially contribute to • Residents of the houses using he two private wells (each serving a house and Significant known VOC- adjacent agricultural uses)would continue to be supplied with bottled water contaminated plume and (These well users also can now access the municipal supply line if they so other groundwater choose); contamination. . The municipal water supply line will continue to service the California Youth Authority facility and Northern California Women's Facility; • Because of the potential for impact of the VOC plume on the shallow groundwater table downgradient and adjacent to the project, existing domestic off-site well DW-9690 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 the responsibility of the RWQCB and must be carried out under their permit authorization;and • Current and future remediation options are currently being evaluated via a expansion engineering feasibility study that will be submitted to the RWQCB, and future remedial measures will be based upon RWQCB's recommendations in response to the findings in this report. F.7. Potential decreases Proposed as part of the project: Less than in groundwater I Significant