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Response to Written Comments Page 7 of 8 07 June 2023 Forward Landfill, Inc. COMMENT NO. 15: (WDR Table 3, Pg 16). 7833-MW-01, -02, -03, and -04 are listed under Corrective Action Program but should not be part of WDR/MRP because impacts at 7833 Newcastle are due to localized source and not a result of VOCs migrating from Forward Landfill. RESPONSE: Additional information and data for monitoring wells 7833-MW-01, - 02, -03, and -04 is needed support hypothesis. The Discharger will continue to work with CVRWQCB in delineating the water quality impact to wells 7833-MW- 01, -02, -03, and -04. COMMENT NO. 16: (WDR Table 3, Pg 16). AMW-24R missing; are the water-bearing zones correct? See Table 2. RESPONSE: AMW-24R added to Table 1. Water bearing zones has been corrected and updated. COMMENT NO. 17: (WDR Requirements 51, H.3). Means a Civil PE or CEG stamp, but not regular PG stamp? RESPONSE: Yes, the reports required by the WDRS (not the MRP) are associated with fixed works and/or engineering geology issues and not hydrogeologic issues. Civil PE or CEG stamp required. COMMENT NO. 18: (WDR Finding 48, Pg 17/42). Submittal of a Point of Compliance Monitoring Well Data Gap Report by 20 Sept 2022. Recommend including AMW-1, AMW-4, AMW-6, AMW-7, AMW-38S, and AMW-39S as POC wells. RESPONSE: AMW-1, -4, -6, -7, -38S, and -39S do not provide sufficient coverage in the northeast corner of the site. New monitoring wells will need to be installed. COMMENT NO. 19: (WDR Table 3, Pg 17). Residential Domestic Wells listed under Correction Action Program in the Tentative WDR. These wells are currently sampled under directive in CAO and the data indicate that they have not been affected by a release from the landfill and should not be included in the more frequent and rigorous reporting program proposed in the Tentative WDR. See Table 3 and 4. RESPONSE: The Residential Domestic Wells shall follow the current reporting guidelines found in the Domestic Well Sampling and Analysis Plan (SAP) that was submitted on May 25, 2017. The SAP was submitted in accordance with Task 1.b of CAO R5-2017-0703. Finding 62 was updated that the Discharger is required to sample and report domestic supply wells in accordance with the CAO. The addition of these wells in the Tentative WDRs does not increase the frequency of reporting or sampling method.