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0 4.3 DRAINAGE SYSTEM MAINTENANci <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 vegetative inspect the cover at the <br />p <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:\PROJECTS\Allied Waste\Forward\Reference Files Prior JTD\June 05 Stage IA Partial FCPCMP\FL-sec4.doc: 6/16/2008 <br />