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DRAFT [TENTATIVE] WASTE DISCHARGE REQUIREMENTS ORDER R5-2023-OOXX 20 FORWARD, INC. FORWARD LANDFILL SAN JOAQUIN COUNTY Draft Engineering Feasibility Study (EFS) for an improved corrective action plan. Staff determined that the Draft EFS was inadequate and requested changes. On 3 September 2000, ownership of Austin Road landfill was transferred to Forward Inc. Forward submitted a revised EFS on 11 June 2001 and a second revised EFS on 30 August 2001. On 13 December 2001, the Central Valley Water Board issued a Time Schedule for Corrective Action. On 26 February 2002, Forward submitted an Evaluation Procedures for Proposed Corrective Action. The resulting corrective action plan, includes the following activities: a. Enhance landfill gas control system to prevent further release of VOCs from the landfill; b. Continued groundwater extraction and treatment with existing extraction wells; C. Implementation of a groundwater artificial recharge system using treated water; d. Additional groundwater monitoring wells to monitor the effectiveness of the corrective action and determination of the need for modifications; and e. Install an interim cover on Austin Road Landfill Unit 1. 58. In 2008, chlorinated solvents including tetrachloroethylene and trichloroethylene were detected in water supply wells at the CDCR facility. On 8 December 2008, the Executive Officer issued Cleanup and Abatement Order (CAO) R5-2008- 0714 (2008 CAO). The 2008 CAO required the Discharger to define the lateral and vertical extent of groundwater impacts downgradient of the landfill, provide an alternate source of drinking water to any landowner with a municipal or domestic well that had a confirmed detection of VOCs, implement source control to prevent VOCs from migrating past the landfill point of compliance, enhance the Facility's landfill gas and groundwater monitoring programs, and submit quarterly progress reports. 59. The Discharger began its efforts to comply with the 2008 CAO by addressing the requirement to provide replacement water for CDCR facility. This was done by extending the City of Stockton's drinking water supply line to the facility. The Discharger also began supplying replacement water to two households near the landfill. The Discharger implemented an evaluation monitoring program in which numerous wells were installed; however, none of the wells were at the downgradient edge of the plume, nor did the Discharger continuously monitor these wells. With regard to source control and remedial actions, the Discharger installed an additional groundwater extraction well and multiple landfill gas extraction wells between 2008 and 2011.