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Consolidated Forward Inc. Landfill Page 20 groundwater extraction system is discharged into Littlejohn Creek currently, which both recharges aquifers below and moves offsite. Treated groundwater from the groundwater extraction system is proposed to be infiltrated back to the aquifer through an infiltration basin (AEE, 2001B, 2002a) located near well MW -11. The infiltration basin would improve recharge to the local aquifer and is also designed to create a hydraulic barrier to inhibit further northward migration of the groundwater plume. The RWQCB letter to Forward dated March 11, 2002 agreed to allow for their recharge remedy (Alternative 11) to go forward without Alternative 3 (extended pumping) while quarterly monitoring at the groundwater wells occurs. If the groundwater VOC concentrations do not attenuate at a rate that is acceptable to the RWQCB then the Board will require that Alternative 3, or some variant on Alternative 3, be implemented. The recent (AEE, 2002x) addendum to the corrective action proposed procedures to analyze the hydrochemical trends and trigger concentrations at which additional extraction wells would be considered. (Atkinson, 2002). 51 (F.9) Identified in This EIR: Replacement wells (as well as additional wells north of the Austin Road Landfill to better define the leading edge of the plume) shall be installed to mitigate against the loss of old wells as presented in the JTD currently under review by the RWQCB. The RWQCB must approve the JTD's plans for the number and location of the new wells as part of their approval process, which is separate from the EIR approval process. 52 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. 53 Austin 1994 (KS.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. 54 Forward 1993 (0) Diesel fuel should be stored in a manner which provides for secondary containment. G. SOILS AND GEOLOGY 55 (G.2) Proposed as Part of the Project: Should additional cover material be needed, alternative daily covers, approved by the CIWMB, will be examined and used. 56 (G.3)