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4.3 DRAINAGE SYSTEM MAINTENANCE <br /> Post-closure maintenance personnel at the landfill will inspect and maintain the <br /> drainage system at Stage IA on a quarterly basis and after significant storm <br /> events. The effectiveness of the surface drainage control structures will be <br /> maintained by keeping drainage ditches clear of debris and excessive <br /> vegetation and by making repairs, as necessary, to correct the effects of <br /> physical damage, erosion, settlement, or other events detrimental to operation <br /> of the drainage control system. Corrective measures will be implemented if <br /> inspections reveal excessive erosion or damage to the drainage channels, or if <br /> settlement causes ponding of stormwater on the final cover. Eroded areas will <br /> require removal of the affected loose material, followed by replacement and <br /> regrading of the area to match the adjacent surface contours. If ponding is <br /> observed in a channel over the final cover, the channel will be regraded to <br /> permit proper drainage of runoff. Inspections and maintenance of the drainage <br /> system will be carried out quarterly and after large precipitation events. <br /> 4.4 VEGETATIVE COVER MAINTENANCE <br /> Personnel at the landfill will maintain and inspect the vegetative cover at the <br /> Stage IA area on a quarterly basis and after significant storm events. <br /> Vegetative cover destroyed by erosion will be reseeded following regrading. If <br /> degradation of the vegetative cover is observed in any area, that area will be <br /> investigated to determine the cause of the degradation. Investigation <br /> procedures may include soil gas analyses to determine methane content in the <br /> root zone. If degradation is suspected to be caused by landfill gas-induced <br /> asphyxiation, a gas wells may be installed to reduce gas flux into the root zone <br /> in the area of the observed degradation. Measures will be taken as practicable <br /> to correct any other condition found to be causing vegetative degradation. <br /> Inspections and fertilization of the vegetative cover will be carried out on an <br /> annual basis. <br /> 4.5 FRENCH DRAIN LIQUID SEEP COLLECTOR MAINTENANCE <br /> Since the french drains are a buried system, the main maintenance procedure <br /> will be final cover maintenance as discussed in Section 4.2. In addition, the <br /> leachate holding tanks will be emptied periodically with portable pumps and <br /> trucked to the leachate impoundment pond. <br /> Forward Landfill PFCPCMP 4-2 <br /> Z:\PROJECTSWIIied Waste\Forward\Reference Files Prior JTDWune 05 Stage IA Partial FCPCMP\FL-sec4.doc:6/16/2008 <br />