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Stakeholder Meeting Agenda for Source-Separated Organic Compost Facilities - October 12, 2011

This document outlines the agenda for a stakeholder meeting held by the MPCA on October 12, 2011, focused on gathering feedback regarding the rulemaking project for Source-Separated Organic Compost (SSOC) facilities. Key topics include groundwater separation requirements, soil permeability standards, pad specifications, compost maturity criteria, and separation distances from neighbors. Participants will discuss upcoming timelines, including feedback deadlines and final adoption procedures. Input sought includes concerns and innovations regarding compost facility regulations.

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Stakeholder Meeting Agenda for Source-Separated Organic Compost Facilities - October 12, 2011

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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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