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Forward Inc. Landfill Expansion Project MMRP ' 67.Austin 1994(K3.c),Austin 2000(K3.c) The timing of the pumped discharge from the detention pond must not occur with the peak flow rate of Little John's Creek as this would impact downstream locations by increasing the ' flood hazard. Telemetry, which monitors the flow in the creek to determine the peak, should be provided. This information should then be used to coordinate the start-up of the pumps. ' 68.Austin 1994(K5.e),Austin 2000(KS.e) The landfill operator would include practices and procedures in the SWFP to comply with AB 1760. The procedures would describe how the expanded landfill would salvage all economically feasible metallic discards. 69. Forward 1993(C3) Diesel fuel should be stored in a manner which provides for secondary containment. ' G. SOILS AND GEOLOGY 70. (G.2)Proposed as Part of the 2013 Project(and incorporated by reference in this Project): • Overall reduction—or, in some cases, elimination or improvement—of slope instability at the project site can be achieved through the implementation of the seismic design measures designed to meet CCR Title 27. 71. (G.3)Proposed as Part of the 2013 Project(and incorporated by reference in this Project): • The applicant's Joint Technical Document references an erosion-control plan that delineates various actions to minimize erosion and sedimentation,including maintaining the effectiveness of the surface drainage control structures by keeping drainage ditches clear of debris and excessive vegetation and by making repairs,as necessary,to correct the effects of physical damage, erosion, settlement, or other events detrimental to effective operation of the drainage control system,and appropriate construction,landscaping, and maintenance of graded slopes and subsurface drainage systems. As part of that plan,grading operations would be scheduled to avoid the rainy season and be implemented by interim engineering control measures. Before grading is stopped, slopes would be directed to carry runoff to areas where erosion and sedimentation can be controlled. Truck beds would be hosed down to reduce soil spillage on paved roads and wind-blown dust. The proposed expansion area would incorporate the same features as used for the existing landfill. In addition,the relocation of Littlejohns Creek could lessen the sedimentation potential to the creek. • Completed cells will be stabilized by the planting and maintenance of drought-resistant grasses. This will inhibit wind and water erosion and maximize the fertility of the soil in order to facilitate revegetation. • Temporary plantings,geofabric drapes, and erosion-preventing diversions of surface water will be constructed as appropriate on temporary slopes. • Regular operational and post-closure monitoring of erosion control structures and plantings will be done for a minimum of five years. 72. Forward 1993 (B.S) Assessment ofgroundwater levels in monitoring wells shall be initiated within 24 hours following an earthquake event having a Modified Mercalli intensity of V or greater at the landfill. This will allow the water level database to be adjusted or seismic variations. In the event that anomalous water level changes are noted, a series of water quality sampling and Page 21