ARCHIVED REPORTS_2002_3 JTD - Laserfiche WebLink

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Results of the monitoring program will be compiled into reports and submitted to the LEA and S)VAPCD, as appropriate. Landfill gas monitoring and sampling data will be reviewed to determine the effectiveness of the installed LFGES. Adjustments or additions to the LFGES will be made as necessary to maintain regulatory compliance. The initial frequency of monitoring and sampling will be applicable for a period of two years. After two years, the frequency of monitoring and sampling will be re-evaluated and amended (if necessary), unless required by regulations. 7.6 DRAINAGE AND EROSION CONTROLS The primary function of the surface water drainage and erosion control system is to minimize erosion, convey surface waters around the refuse cells and off the landfill in order to minimize potential infiltration of surface water into the refuse prism. The surface water control plan for both the existing Forward and Austin Road Landfills consists of an integrated system of bench ditches, perimeter swales, and stormwater sedimentation basins. The final landfill is designed so surface water will run off the landfill via sheet flow until it is intercepted by a bench ditch. Bench ditches subsequently drain toward downdrains which discharge to perimeter channels. Finally, the perimeter channels drain to a sedimentation/detention basin. As required for a Class II landfill, the drainage system for the future Forward Landfill has been designed to convey a peak discharge resulting from a 1,000-year, storm event. The final stormwater drainage control facilities based on this criteria are shown on Drawing 9 and supporting information is presented in Drawing 10, Hydrology Map and Appendix G. The drainage network for the completed landfill is designed to carry stormwater at velocities that will minimize ditch erosion. The operations manager monitors and inspects the condition and order of facilities, surfaces, and slopes as part of the daily operations. Surface drainage facilities, final soil cover areas, intermediate fill surfaces, and on-site access roads are observed routinely, and at least weekly during high-intensity rainfall periods. All necessary repairs are performed promptly. Temporary berms, straw mulch, or other erosion-control measures may be used to prevent erosion damage of soil covered areas when weather conditions inhibit complete repairs. All completed WMUs, cut and fill slopes, and portions of the landfill that will be exposed for Forward Landfill JTD 7-14 L:\Allied\2000.193\R eports\itd:Sec-7.0:05/24/02 BRYAN A.STIRRAT fi ASSOCIATES