Laserfiche WebLink
0 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 events. <br />The effectiveness of the surface drainage control structures will be maintained by <br />keeping drainage ditches clear of debris and excessive vegetation and by making <br />repairs, as necessary, to correct the effects of physical damage, erosion, settlement, <br />or other events detrimental to operation of the drainage control system. <br />Corrective measures will be implemented if inspections reveal excessive erosion or <br />damage to the drainage channels, or if settlement causes ponding of stormwater <br />on the final cover. Eroded areas will require removal of the affected loose <br />material, followed by replacement and regrading of the area to match the adjacent <br />surface contours. If ponding is observed in a channel over the final cover, the <br />channel will be regraded to permit proper drainage of runoff. Inspections and <br />maintenance of the drainage system will be carried out quarterly and after large <br />precipitation events. <br />4.4 VEGETATIVE COVER MAINTENANCE <br />Personnel at the landfill will maintain and inspect the vegetative cover at the Stage <br />IA area 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 in the root zone. If degradation 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 of the 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 FRENCH DRAIN LIQUID SEEP COLLECTOR MAINTENANCE <br />Since the french drains are a buried system, the main maintenance procedure will <br />be final cover maintenance as discussed in Section 4.2. In addition, the leachate <br />holding tanks will be emptied periodically with portable pumps and trucked to the <br />isleachate impoundment pond. <br />Forward Landfill PFCPCMP 4-2 <br />J:\Allied\Forward\2005.0051 Partial Closure\Partial Closure Plan\FL-sec4.doc: 6/9/2005 <br />