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Class III Landfill Waste Acceptance -2- 3 November 1988 For wastes classified as non-hazardous under Title 22, you must additionally acquire sufficient information to establish that the waste is not a `designated waste' under Section 2522 e 20210 of Title 27 Subehapter 1 S. Under this section of the regulations, a non-hazardous waste is a `designated waste' if it"consists of or contains pollutants which, under ambient environmental conditions at the waste management unit, could be released at concentrations in excess of applicable water quality objectives, or which could cause degradation of waters of the state." Determination that a waste is not a `designated waste' under this definition involves the following steps: 1) Determine which bodies of water could be affected should waste or leachate migrate from the WMU. The Findings of your WDRs should name these water bodies. 2) Determine the existing and probable future beneficial uses of these waters, as defined by the Water Quality Control Plan Report(Basin Plan). Usually, it is safe to assume that the most restrictive uses of ground-vvaters will be for drinking water or agricultural purposes. For surface waters, freshwater aquatic life protection should also be considered. The Findings of your WDRs should name these uses. 3) Determine the constituents of the waste which pose a water quality threat, should migration to waters of the state occur. Total dissolved solids (TDS) and specific conductivity (EC) should be included. 4) Determine the water quality objectives which protect the beneficial uses from these waste constituents of concern. Water quality objectives are listed in the Basin Plan. For ground water,these objectives are as listed on the attachment"Water Quality Objectives for Ground Waters". In determining compliance with these narrative water quality objectives, it is often necessary to refer to water quality criteria established by state and federal agencies for the protection of various beneficial uses. A compilation of such criteria is contained in the Regional Board document"A Compilation of Water Quality Goals", available from this office for$5.00. Where several numerical objectives and/or criteria are available for a single waste constituent,the most restrictive number should be selected which will protect all present and probable future beneficial uses. 5) Determine whether the disposal environment or the waste could be acidic. Acidic conditions are assumed if the waste will be discharged with other putrescible wastes in the Class III landfill or if the waste is itself putrescible or otherwise capable of generating acid(e.g" mining waste which contains oxidizable sulfide minerals and insufficient neutralizing capacity). One measure of putrescibility is the determination of the total organic carbon (TOC) content of the waste. If the TOC is at a significant level, usually considered to be 5%or more,the waste is considered putrescible. Acid generation potential is determined by an acid-base account, as specified in the EPA publication"Field and Laboratory Methods Applicable to Overburdens and Minesoils"(National Technical Information Service Publication PB-280 495)or equivalent methods. Discharge to a monofill or in the foundation layer of the final cap of the landfill would not be considered acid generating conditions if the waste itself is not putrescible nor capable of generating acid. Division 4.5, Chapter 11, Appendix II 6) Determine the soluble or extractable concentrations of the constituents of representative waste samples by the Waste Extraction Test(WET) [Title 22 CCR, Seet-ien 66700]. The extraction solutions should be as specified in the regulations if the waste will be discharged with other putrescible wastes in the Class III landfill or if the waste is itself putrescible or otherwise capable of generating acid. The extraction solution may be deionized water if the waste will be discharged to a monofill or placed in the foundation of the final cap of the landfill and the 01 waste is not putrescible nor capable of acid generation. The resulting extract(s) should be analyzed for all waste constituents specified in section (3) above. The deionized water extract should also be analyzed for total dissolved solids (TDS), specific conductivity(EC), and pH.