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Response to Written Comments Page 8 of 9 07 June 2023 Forward Landfill, Inc. COMMENT NO. 20: (WDR Finding 50, Pg 17). RWQCB advised during WMU FU-19 design to not include suction cup lysimeters under the sump and to just include the pan lysimeter. Therefore WMU FU-19 does not have suction cup lysimeters and they are not planned to be installed in future WMUs. RESPONSE: Language for Finding 50 has been updated to discuss the discontinued use of suction lysimeters. COMMENT NO. 21: (WDR Table 4, Pg 17-18). Last 2 rows list Forward as Monitored Unit. Should it be Austin? RESPONSE: The monitoring unit will now be referred to as "Forward" since the addition of WMU FU-19 connects old Forward and old Austin Road together. COMMENT NO. 22: (WDR Finding 55-70, Pg 19-22). Please add the following item after Finding 70. "The discharger has worked with and is continuing to work with the RWQCB to resolve the above listed NOVs and enforcement orders." RESPONSE: The administrative record includes documentation for resolving the various NOVs that have been issued. This comment does not need to be included in the WDRs. COMMENT NO. 23: (WDR Finding 73, Pg 22). Please clarify how soil-pore liquid data is to be obtained and tested if base of WMU is not in capillary zone? RESPONSE: Reference Title 27 Section 20415 for additional information. A monitoring system shall comply with the provisions set in Title 27. Unsaturated zone monitoring is required at all new Units unless the discharger demonstrates to the satisfaction of the RWQCB that there is no unsaturated zone monitoring device or method designed to operate under the subsurface conditions existent at that Unit. COMMENT NO. 24: (WDR Finding 76, Pg 22). Should the reference be to Finding 74? RESPONSE: Updated to correct reference. COMMENT NO. 25: (WDR Finding 82, Pg 23). Intermediate liner is also included on WMUs D-94, D-97, D-98, D-99, and D-00. RESPONSE: The additional WMUs have been added to Finding 83. COMMENT NO. 26: (WDR Finding 96, Pg 26). Reference should be to Table 6 RESPONSE: Updated to correct reference.