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MPCA Rulemaking Project for Source-Separated Organic Compost (SSOC) Facilities

MPCA Rulemaking Project for Source-Separated Organic Compost (SSOC) Facilities. Stakeholder Meeting for Focused Feedback October 12, 2011. Agenda. Introduction. Dave Benke—Resource Management and Assistance Division Director

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MPCA Rulemaking Project for Source-Separated Organic Compost (SSOC) Facilities

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  1. MPCA Rulemaking Project for Source-Separated Organic Compost (SSOC) Facilities Stakeholder Meeting for Focused Feedback October 12, 2011

  2. Agenda

  3. Introduction • Dave Benke—Resource Management and Assistance Division Director • Steve Giddings—Prevention & Solid Waste Management Section Manager • Milt Thomas—Facilitator • Other MPCA Staff

  4. Tentative Rule Schedule • Request for Comments: 10/17/11(revised) • Comment period closes at 4:30pm 11/18/11 • Dual Notice (DN) – Summer 2012 • Final Adoption: • with hearing - 6 months after DN • w/o hearing - 3 months after DN

  5. Feedback Topics • 5 foot separation to groundwater • Soil permeability requirement • Pad requirements • Compost Maturity • 500 feet of horizontal separation

  6. 5’ separation to the groundwater 7035.2555 subp. 3: An owner or operator may not establish or construct a source-separated waste composting facility in the following areas: (B) within five feet of a water table • The water table is defined in Minn. R. 7035.0300 • Generally top of saturated zone • Perched groundwater tables will be considered on a site by site basis

  7. Soil Permeability Requirement 7035.2836 subp. 8(G): at a minimum, the site should have a net of five feet of native soil with a maximum permeability of 1.4 x 10-4 cm/sec • The permeability throughout the entire 5 feet of soil must be less than 1.4 x 10-4 cm/sec • If there is more than 5 feet of soil, the net permeability of the soil must be less than 1.4 x 10-4 cm/sec

  8. Pad Requirements Is there more than 5’ of native soil to the groundwater?? Pad required NO Option #1: Soil Pad Place at least 1’ of soil with a permeability of less than 1x10-5cm/sec (must have at least 5’ to groundwater) NO YES NO Does that 5’ of soil have a net permeability less than 1.4x10-4 cm/sec?? Option #2: Geomembrane Install liner system defined in 7035.2836 subp. 4 YES YES Possible Option #3: Hard Surface Concrete or asphalt pad No pad required

  9. Pad Requirements • If a pad is required, • Must be at least 1’ of soil with a permeability less than 1 x 10-5 cm/sec • There must be at least 5’ of soil between the final grade and groundwater • Tipping area, active composting and screening must be done on a pad • Storage of mature compost does not require a pad

  10. Compost Maturity Maturity is defined in Minn. R. 7035.2636 • 60% decomposition as determined by an ignition-loss analysis and one method approved by the commissioner including, but not limited to: • Solvita (7-8) • C/N ratio (10:1 to 20:1) • Other MPCA approved methods

  11. 500’ separation to neighbors 7035.2555 subp. 3: An owner or operator may not establish or construct a source-separated waste composting facility in the following areas: (C) A minimum of 500 feet horizontal separation distance from the facility to the nearest… • Requires 500 feet between all permitted waste activity areas and the nearest neighbor. • Tipping Area • Screening Area • Compost Pad • Finish Compost Storage • Contact Water Treatment

  12. Discussion

  13. Variance Process Minn. R. 7000.7000 • Applicant may apply for variances for: • Grounds of economic burden • Grounds that compliance is not technically feasible

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