ARCHIVED REPORTS_JULY 2014 FINAL TPR

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peripheral areas will be revegetated to inhibit erosion. d. 46 (F.3) Proposed as Part of the Project: The liner and leachate collection system for the expansion system -both over the top of the existing unlined Austin Road landfill and the extension of the existing leachate collection system at FOlWard--have been designed to meet or exceed the regulatory requirements as shown and discussed in the applicants JTD. The JTD and the adequacy of the leachate collection system and associated monitoring are under review by the RWQCB. The regulatory required separation between the liner and groundwater will be implemented to allow for chemicals in the leachate to attel)uate before reaching the groundwater, should the leachate breach the collection system. The project design includes a leak detection system under the sumps. The liner system will be ovenain by a protective operations layer consisting of a one-foot thickness of soil and a one-foot thick gravel layer that serves as the leachate collection layer. This two-foot layer will serve to protect the liner system from sharp or jagged materials in the waste. The operator will remove any hazardous materials spotted during delivery, thus minimizing the potential for leachate contamination if a break occurs in the liner or the leachate collection system. A double liner shall be installed under the sump area, as required by the RWQCB; Electric testing of the liner in each Waste Management Unit shall be conducted before waste can be disposed in that Unit, as required by the RWQC8; and Identified in EIR: If any modifications to the leachate collection system and associated monitoring described in the JTD are required the RWQCB: the landfill operator shall implement those changes. e. 47 (F.4) Proposed as Part of the Project: Proposed measures to address concems about additiooal leachate generation as a result of . the combined landfill have been addressed in the JTD with the presentation of the EPA HELP model resuHs based on the projected volumes of refuse, and the description of the leachate collection system deSigned to meet the maximum probable leachate generated. Engineering control systems Qeachate collection system, drainage control, groundwater and gas controls), monitoring programs, and institutional controls have been presented in the JTD currently under review at the RWQCB. Reporting on leachate generation 'volume and quality is a requirement of the RWQCB-stipulated progress reporting through the various proposed landfilling phases. The landfill cell anchor trenches will be elevated two to three feet above the surrounding land to minimize the possibility of water from major storm events draining into the cells and adding to the volume of leachate. Identified in EIR: Continued monitoring ofthe effectiveness of mitigation measures for leachate shall be performed by the responsible regulatory agencies (currently the RWQCB and, for the WMU- San Joaquin County Community Development UP-DD-7, ER-DD-2IFolWard,lnc. Page 15