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• 7.2.2.2 PROPOSED GROUNDWATER MONITORING NETWORK Expansion of the existing Forward and Austin Road Landfills into a single landfill facility will necessitate changes to the current groundwater monitoring programs at these.sites. The monitoring program changes will need to address the new configuration of the expanded site, post-closure monitoring at closed WMU-A at the existing Forward site, and the on-going corrective action program at the Austin Road facility. Table 17 lists the groundwater monitoring wells that have been constructed at the two landfill facilities and indicates how the wells are proposed to be integrated into a single groundwater monitoring well network for the planned expanded Forward Landfill. As depicted on Figure 7, the new monitoring well network will include 45 wells; 12 for post-closure monitoring of WMU-A, 22 additional wells for the Detection Monitoring Program (DMP); and 11 wells to monitor the effectiveness of the Corrective Action Program (CAP) north of the existing Austin Road parcel. • Of the 45 wells, 9 wells have not yet been constructed, but are proposed to meet DMP and CAP monitoring requirements. The locations of the proposed CAP wells were selected based on comments presented by the RWQCB in their letter to Forward Inc., dated June 22, 2001. As requested by the RWQCB, the new CAP wells will be constructed to monitor both shallow and deep groundwater zones. This program has been included as part of the tentative WDRs to be considered for adoption on June 7, 2002. The locations for the proposed DMP wells were selected to provide additional spatial coverage for the new landfill expansion. The design for all new monitoring wells will be detailed in a work plan that will be prepared under the supervision of a certified (geologist or civil) engineer. Similarly, all well construction work will be performed under the direction of a certified (geologist or civil) engineer. As indicated in Table 17, several monitoring wells will also need to be abandoned to accommodate the expanding landfill footprint. Elimination of these wells, however, should not affect the early detection capability of the DMP network. All well abandonment work will described first in a work plan that will be prepared under the supervision of certified (geologist or civil) engineer who will also direct • all field activities. Forward Landfill JTD 7-5 L:\Allied\2000.193\Reports\td:Sec-7.0:05/24/02 BRYAN A.STIRRAT 6 ASSOCIATES