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WASTE DISCHARGE REQUIREMENTS ORDER R5-2015-0058-01 -4- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS FOOTHILL SANITARY LANDFILL, INC. FOOTHILL LANDFILL SAN JOAQUIN COUNTY 11. On 9 October 1991, the United States Environmental Protection Agency (USEPA) promulgated MSW landfill regulations under the Resource Conservation and Recovery Act (RCRA) known as “Subtitle D” (Code of Federal Regulations, title 40, part 258). Subtitle D applies to all California unclassified, Class II and III landfills that ever accepted MSW and any waste on or after the effective date of Subtitle D (9 October 1991). Limited exceptions to the applicability of Subtitle D regulations include (but are not limited to) a. MSW landfills that ceased accepting wastes prior to the federal deadline may only be required to comply with the closure/postclosure requirements in Subpart F (40 CFR 258.60); and b. MSW landfills constructed prior to the federal deadline may be exempt from the design requirements in Subpart D (40 CFR 258.40). 12. State Water Resources Control Board Resolution 93-62 (as amended on 21 July 2005, Policy for Regulation of Municipal Solid Waste (Resolution 93-62) requires the Central Valley Water Board WDRs for MSW landfills to implement the applicable provisions of the federal MSW regulations that are necessary to protect water quality, and in particular the containment provisions and the provisions that are either more stringent or that do not exist in Title 27. See Resolution 93-62, Provision I.A. Title 27 provisions applicable to MSW landfills that are equivalent to, or more stringent than, corresponding Subtitle D regulations are not affected by Resolution 93-62. 13. LF-1’s waste footprint was established prior to the Subtitle D federal deadline, so it was not required to be retrofitted with a Subtitle D composite base liner per the exemption described in Finding 11.b above. The landfill accepted waste after the effective date of Subtitle D, however, so it is subject to all other Subtitle D requirements, as referenced in Resolution 93-62, Attachment 1. LF-2, however, is subject to all of Subtitle D regulations because it accepted waste after the effective date of Subtitle D and is still active. 14. This Order implements the applicable regulations for discharges of solid waste to land through Prohibitions, Specifications, Provisions, and monitoring and reporting requirements. Prohibitions, Specifications, and Provisions are listed in Sections A through H of these WDRs below, and in the Standard Provisions and Reporting Requirements (SPRRs) for Nonhazardous Solid Waste Discharges Regulated by Subtitle D and/or Title 27 dated January 2012 which are part of this Order. Monitoring and reporting requirements are included in the Monitoring and Reporting Program Order (MRP) R5-2015-0058 (operative MRP) and in the SPRRs (See Finding 15). In general, requirements that are either in regulations or otherwise apply to all MSW landfills are considered to be “standard” and are therefore in the SPRRs. Any site- specific changes to a requirement in the SPRRs are included in the applicable section (Sections A through H) of these WDRs, and such requirement in the WDRs supersedes the requirement in the SPRRs. 15. Each time the operative MRP is modified, the revised version shall become the operative MRP (superseding the prior version) and be incorporated as part of this Order (i.e. in lieu of the prior version).