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events. The effectiveness of the surface drainage control structures will be <br />maintained by keeping drainage ditches clear of debris and excessive vegetation <br />and by making repairs, as necessary, to correct the effects of physical damage, <br />erosion, settlement, or other events detrimental to operation of the drainage <br />control system. Corrective measures will be implemented if inspections reveal <br />excessive erosion or damage to the drainage channels, or if settlement causes <br />ponding of stormwater on the final cover. Eroded areas will require removal of the <br />affected loose material, followed by replacement and regrading of the area to <br />match the adjacent surface contours. If ponding is observed in a channel over the <br />final cover, the channel will be regraded to permit proper drainage of runoff. <br />Inspections and maintenance of the drainage system will be carried out quarterly <br />and after large precipitation events. <br />4.4 VEGETATIVE COVER MAINTENANCE <br />Personnel at the landfill will maintain.and inspect.the.,vegetative..cover on the <br />landfill on a quarterly basis and after significant storm events. Vegetative cover <br />destroyed by erosion will be reseeded following regrading If degradation of the <br />vegetative cover is observed in any area, that area will be investigated to <br />determine the cause of the degradation. Investigation procedures may include soil <br />gas analyses to determine methane content,-4n,therroot,zone. -JfAegradation is <br />suspected to be caused by landfill gas -induced asphyxiation, a gas wells may be <br />installed to reduce gas flux into the root zone in, the area of1he observed <br />degradation. Measures will be taken as practicable to correct any other condition <br />found to be causing vegetative degradation. Inspections and fertilization of the <br />vegetative cover will be carried out on an annual basis. <br />4.5 LEACHATE CONTROL SYSTEM MAINTENANCE <br />The integrity and effectiveness of the leachate collection system and treatment <br />system will be maintained by repair or replacement of portions of the system as <br />necessary. The collection system will be inspected to ascertain that collected <br />leachate is conveyed from the collection trenches to the leachate evaporation <br />ponds. A routine monitoring inspection and maintenance program will be <br />developed for the leachate collection and treatment system during preparation of <br />plans and specifications. The maintenance program will include quarterly <br />inspections of the leachate collection pumps and evaporation ponds and annual <br />inspections of the LCRS pipes. The LCRS pipes will be cleaned, if necessary. <br />Forward Landfill PCPCMP 4-2 <br />L:\Allied\2000.193\Reports\FinaIPCPCMP:FL-sec4: 8/20/01 BRYAN A- STIRRAT S ASSOCIATES <br />