COMPLIANCE INFO_JTD 9/3/2025 - Laserfiche WebLink

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WASTE DISCHARGE REQUIREMENTS ORDER R5-2015-0058-01 -5- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS FOOTHILL SANITARY LANDFILL, INC. FOOTHILL LANDFILL SAN JOAQUIN COUNTY 16. On 8 May 2023, the Discharger notified Central Valley Water Board staff by email that, due to an above average wet season, the leachate volume of Sumps 1, 2A, and 2B were not in compliance with 40 C.F.R. part 258.40, subdivision (a)(2), which states: “New MSWLF units and lateral expansions shall be constructed ... [w]ith a composite liner… and a leachate collection system that is designed and constructed to maintain less than a 30-cm depth of leachate over the liner.” Leachate levels in Sumps 1 and 2B exceeded the compliance limits in approximately late December 2022. Sump 2A exceeded the compliance limit in mid-January 2023. 17. On 6 June 2023, the Discharger submitted the Foothill Leachate Compliance Plan to address the short-term and long-term management of leachate. In the short-term, the Discharger proposed to continue to capture leachate in tanks and haul it offsite while performing modifications within the Sump 1 to address pumping deficiencies. In the long-term, the Discharger proposed continuous pumping, usage of storage ponds, a pump station installation, consolidation of leachate recirculation lines, and utilization of the existing flare and fill station. 18. On 27 June 2023, a Notice of Violation was issued for leachate levels exceeding the 30- cm depth over the liner and for failure to comply with certain requirements of the SPRRs. 19. On 26 July 2023, Central Valley Water Board staff approved the 6 June 2023 Foothill Leachate Compliance Plan. 20. On 7 March 2024, the Discharger submitted Design Basis Analysis Calaveras Surface Impoundment Report (Surface Impoundment Report), which included a conceptual design, preliminary construction drawings, water balance, and slope stability evaluation for the proposed 1.5-acre Calaveras surface impoundment (SI) (see Attachment G). On 16 May 2024, Central Valley Water Board staff issued a concurrence letter regarding the preliminary review of the Surface Impoundment Report. 21. A complete Amended Report of Waste Discharge (ROWD) for the proposed construction of a surface impoundment has not been submitted. In accordance with Title 27, section 21710, subdivision (a)(4), this Order requires the Discharger to submit a complete Amended ROWD (see Provision H.9.n). The Discharger shall include and/or reference previously submitted information relevant to proposed post-closure and corrective action activities to be authorized via WDRs issued by the Central Valley Water Board. The ROWD shall be certified by an appropriate professional per Title 27 section 21710, subdivision (d). 22. In 2025, the Central Valley Water Board adopted Order R5-2025-XXXX, which amended WDRs Order R5-2015-0058 to add prohibitions, specifications, provisions, and monitoring and reporting requirements associated with the Class II surface impoundment Waste Management Unit (WMU) in Finding 9. 23. As Facility owners and/or operators, the Discharger is responsible for compliance with this Order.