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Draft Environmental Impact Report Page 1I-19 <br /> Forward Inc. Landfill Expansion <br /> No additional pleasures are required. <br /> FA. Project activities, Proposed as Part of the Project: Less than <br /> which increase leachate The Proposed measures to address concerns about additional leachate Significant <br /> production from existing generation as a result of the combined landfill have been addressed in the JTD <br /> landfill materials could with the presentation of the updated EPA HELP model results based on the <br /> result in additional projected.volumes of refuse,a historical analyses of actual leachate generation <br /> groundwater volumes (which were at significantly higher volumes then the model predicted <br /> contamination. for peak year rainfall) and the description of the leachate collection system <br /> designed to meet the maximum probable leachate generated. Engineering <br /> control systems(leachate collection system, drainage control, groundwater and <br /> gas controls), monitoring programs, and institutional controls have been <br /> presented in the JTD, which has been reviewed by the RWQCB. Reporting on <br /> leachate generation volume and quality is a requirement of the RWQCB- <br /> stipulated progress reporting through the various proposed landfilling phases. <br /> • The landfill cell anchor trenches will be elevated two to three feet above the <br /> surrounding land to minimize the possibility of water from major storm events <br /> draining into the cells and adding to the volume of leachate. <br /> Identified in This EIR: <br /> Mitigation Measure FA: Continued monitoring of the effectiveness of mitigation <br /> measures for leachate shall be performed by the responsible regulatory agencies <br /> (currently the RWQCB and,for the WMU-A,the DTSC). These agencies keep abreast of <br /> state-of-the-art information on leachate generation mechanisms and appropriate <br /> mitigation. If,in the future, monitoring demonstrates that the procedures above were <br /> insufficient to mitigate the effects of landfill-generated leachate,the agencies will, as <br /> appropriate, require additional corrective actions. <br /> F.5. Surface and/or Proposed as Part of the Project: Less than <br /> groundwater Significant <br /> contamination could A settlement analyses was performed to evaluate how landfill grades could <br /> result if differential change in the future as refuse materials biodegrade and consolidate. <br /> settlement damaged the <br />