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Consolidated Forward Inc. Landfill Page 13 <br />45 (F.2) <br />site. The sUrface-water collection drain system will be designed to divert the water to the <br />storm water collection basin in the southwest comer of the c= Austin Road Landfill, at <br />times when enough sUrface water accumulates to have discharged into the collection basin. <br />All waste at the proposed Forward Landfill will be separated from the north and south <br />branches of Littlejohns Creek by a levee system or other acceptable method designed to <br />protect the site from a IOO-year flood event. <br />The project includes channel reconfiguration and localized flood protection berms to isolate <br />the landfill sUrfaces from floodwaters. <br />The project design also includes provision of replacement flood;>lain area and storage volume <br />in an easement along the relocated North Branch of the South For' ... of South Littlejohns <br />Creek. <br />The channel and floodplain storage easement are designed to ac-=odate the IOO-year, 24- <br />hour storm. The design also includes a three-foot freeboard. <br />Proposed as Part of the Project: <br />46 (F.3) <br />The JTD articulates the programs of drainage control structures and monitoring to inhibit <br />erosion and sedimentation. Proposed structural controls incluCe me drainage control system <br />and daily cover. Operational controls include maintenance of 6e drainage system by keeping <br />ditches clear of debris and excessive vegetation, and making n~ repairs to drainage <br />strucrures. Corrective measures will be implemented if inspections show excessive erosion or <br />damage to drainage channels. Eroded areas will be mitigated by removing loose debris <br />followed by replacement, regrading, and compacting the area.. :!-.lonitoring and protection <br />against sediment from entering the Littlejohns stream channel will be implemented, including <br />the diversion of part ofLittlejobns Creek farther away from the landfilled area. <br />In order to minimize sediment transport to the Littlej ohns Creek,. landfill slopes, ridgetops, <br />and peripheral areas will be revegetated to inhibit erosion. <br />/ <br />Proposed as Part of the Project: <br />The liner and·leachate collection system for the expansion sysk:m -both over the top of the <br />existing unlined Austin Road landfill and the extension of the existing leachate collection <br />system at Forward-have been designed to meet or exceed the regulatory requirements as . <br />shown and discussed in the applicants ITO. The ITO and the adequacy ofthe-1eachate <br />collection system and associated monitoring are under review by the R WQCB. <br />The regulatory required separation between the liner and grour::awater will be implemented to <br />allow for chemicals in the leachate to attenuate before reachin~ me groundwater, should the <br />leachate breach the collection system. <br />The project design includes a leak detection system under the snnps. <br />The liner system will be overlain by a protective operations layer consisting of a one-foot <br />thickness of soil and a one-foot thick gravel layer that serves as !he leachate collection layer. <br />This two-foot layer will serve to protect the liner system from 5barp or jagged materials in the <br />waste.