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DRAFT [TENTATIVE] WASTE DISCHARGE REQUIREMENTS ORDER R5-2023-OOXX 22 FORWARD, INC. FORWARD LANDFILL SAN JOAQUIN COUNTY concentration limit exceedance was caused by another Forward Landfill unit upgradient of WMU A. 67. On 4 June 2020, a Notice of Violation for Acceptance of Hazardous Waste was issued for the illegal acceptance of hazardous waste. The Discharger accepted hazardous waste from the Alco Iron and Metal Company, which contained hazardous levels of lead, Cadmium, Zinc, Chromium, Copper, and Nickel. 68. On 3 August 2021, a Notice of Violation was issued regarding the observed settlement above the Old Austin Unit. Based on the Settlement Analysis on the Austin Unit — Leachate/Gas System Impacted report submitted by the Discharger on 3 September 2021 , these WDRs require the functionality of the leachate collection and removal system (LCRS) above the 4-foot clay cap to be evaluated. See Section I, Table 11 Item 7. 69. On 29 March 2022, a Notice of Release was issued to the Discharger for the unauthorized release of waste from WMU F West. Liquid was discovered in the sump on 23 February 2022, which prompted the Discharger to begin transferring leachate from WMU F West to WMU F North. On 9 March 2022, liquid was discovered in suction lysimeter LY-Pond-S, which was located beneath the secondary geomembrane liner. On 22 March 2022, a leak location survey was conducted on the primary geomembrane liner. On 5 May 2022, the Discharger confirmed that two holes, six inches in diameter, were identified on the primary and secondary geomembrane liner. The Discharger established an Evaluating Monitoring Program (EMP) to assess the nature and extent of the release from the unit, as well as, design a corrective action program. Soil and groundwater data, including the installation of additional groundwater monitoring wells, indicate that there was not a significant release to the environment. During the EMP process, all liner materials, with the exception of the secondary liner on the west side of the surface impoundment, was removed. The Discharger has pursued the option to reconstruct WMU F West. 70. The groundwater extraction system consists of five groundwater extraction wells at the downgradient boundary of the former Austin Road Unit and one groundwater extraction well on the California Department of Corrections and Rehabilitation (CDCR) property, located approximately 1 ,900 feet north of the landfill. These wells are identified as EW-1, EW-2, EW-3R, EW-4, and EW-5 on the Austin Road Unit and CDCR-EW-1 on the CDCR property. VOCs were removed with an air stripper until May 2018. 71. The extracted groundwater is currently treated by two 10,000-pound granular active carbon (GAC) vessels that were installed in January 2020. The treated water is discharged to a recharge basin to recharge the shallow aquifer.