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LTE TI S F DISP SAL OF WASTEWATER TREATMENT SLUDGES WITH NON—HAZARDOUS CONSTITUENT CO CENTRATIONS OR WITH A VARIANCE FROM CLASS i DISPOSAL FROM DHS ALTERNATIVE REGIONAL BOARD REQUIREMENTS AND COMMENTS LAND SPREADING Exempted from Subchapter 15 per S 251 1(f) pursuant to best management practices; WDRs or Reclamation Requirements be issued for this may use. (SOIL AMENDMENT) • Loading rates are such that soluble constituent concentrations in soils remain below Soluble Designated References: Levels for the specific site and below levels that are injurious to crops or to consumers of the crops. 1) The Designated Level Methodology • Application is controlled to prevent direct runoff of constituents to surface waters. 2) DHS—Manual of Good Practice for • Application of sludge is shown to provide a benefit to the soil, such that the application does not simply Land Spreading of Sewage Sludge constitute disposal. • Only treatment or storage ( not disposal) at the sewage treatment plant site is exempt from Subchapter 15 DEDICATED LAND per S 251 1(a); WDRs or Reclamation Requirements may be issued for treatment or storage. DISPOSAL OR MONOFI LL • Requires WDRs as Class I I land treatment unit per SS 2532(b)(5) & 2549 of Subchapter 15 if sludge is to (ABSENT ANY be land spread even at the sewage treatment plant site (except if applied as a soil amendment as above). • Requires WDRs as Class I I landfill or surface impoundment per S 2520(d)(2) if sludge is not landspread, OTHER WASTES) and if sludge has < 50% solids or has soluble constituent concentrations per deionized water WET are at or References: above Soluble Designated Levels for the specific site. 1) The Designated Level Methodology • Requires WDRs as Class I I I landfill if sludge is not landspread, has t 50% solids, and has soluble constituent 2) Charlene Herbst, SWRCB concentrations per deionized water WET are below Soluble Designated Levels for the specific site. DISPOSAL IN CLASS I I 1 • Per S 2523(c) of Subchapter 15 -- 1) landfill must have LCRS; 2) sludge is z20% solids if primary or LANDFILL WITH REFUSE z 15% if secondary or mixture of primary and secondary; and 3) minimum solids to liquid ratio of 5:1 is 'nonhazardous maintained in the landfill such that moisture holding capacity of solid waste' is not exceeded. References: • Soluble constituent concentrations per citrate buffer WET are below Designated Levels for the specific site. i) The Designated Level Methodology 2) LA Co. San. Dist. — Landfill Demonstration Project, Phase I DISPOSAL IN CLASS i i I • Per S 2523(c) of Subchapter 15 — 1) landfill must have LCRS; 2) sludge is 120% solids if primary or LANDFILL WITHOUT REFUSE i 15% if secondary or mixture of primary and secondary, and 3) minimum solids to liquid ratio of 5:1 is in the landfill such that moisture holding capacity of non -sludge waste in landfill is not exceeded. (WITH OTHER ABSORBENTmaintained • Soluble constituent concentrations per deionized water WET are below Designated Levels for the specific site. INERT WASTES) • Landfill conditions must maintain neutral or basic pH. Reference: The Designated Level Methodology USE IN FOUNDATION LAYER • Per S 2581(a)( i ) of Subchapter 15. OF FINAL COVER FOR • The moisture holding capacity of the foundation layer shall not be exceeded, even upon compaction. • Soluble constituent concentrations per deionized water WET are below Designated Levels for the specific site. CLASS f I i LANDF i LL Reference: The Designated Level Methodology COMPOSTING • Per S 2511 (h) of Subchapter 15; any residual waste must be managed per the Subchapter. DL8/J8M 8/12/87