CORRESPONDENCE_2000-2003 - Laserfiche WebLink

Home Browse Search

Consolidated Forwac. Landfill Page 14 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 Iiner shall be installed under the sump area.as required by the RWQCB; EIectric testing of the liner in each Waste Management Uni:shall be conducted before waste can be disposed in that Unit, as required by the RWQCB: and Identified in This EIR: If any modifications to the leachate collection system and, associated monitoring described in the JTD are required the RWQCB, the landfill operator sha': implement those changes. 47 (F.4) Proposed as Part of the Project: Proposed measures to address concerns about addition-1lea."ate generation as a result of the combined landfill have been addressed in the JTD with the:-esentation of the EPA HELP model results based on the projected volumes of refuse. and :::e description of the leachate collection system designed to meet the maximum probable 1e_:,hate generated. Engineering control systems (leachate collection system, drainage conco:. groundwater and vas controls), monitoring programs, and institutional controls have be.n pr.sented in the JTD currently under review at the RWQCB. Reporting on leachate genera:ion volume and quality is a requirement of the RWQCB-stipulated progress reporting t.-ouch the various proposed IandfiIling 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 This EER: Continued monitoring of the effectiveness of mitigation measures for leachate shall be performed by the responsible regulatory agencies(currently the RWQCB and,for the WMU- a A,the DTSQ. These agencies keep abreast of state-of-the-art information on leachate generation mechanisms and appropriate mitigation. If,in the future,monitoring demonstrates that the procedures above were insufficient to mitigate the effects of landfill-generated F leachate,the agencies will,as appropriate,require additional mitigation measures. 48(F.S7 Proposed as Part of the Project: { Maximum pre-loaded settlement of the combined landfill is projected in the JTD to provide the maximum period for settlement,and take advantage of anticipated improvements in' geosynthetic technology. 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 extraction wells proposed as part of the Revised Engine.-n¢Feasibility Study(AEE, 2001B) will be maintained and monitored during combine-:la i11 build-out phases, and modified as needed based on the RWQCB's review of mon::o--.2 data.