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The Compost Rule Project. November 19, 2010. Introduction. Logistics Webcast Information Emails during live webcast must be sent to [email protected] Compost Rule Team. The Compost Rule Process. Why the rule revision? What happens next?.

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The compost rule project

The Compost Rule Project

November 19, 2010


  • Logistics

  • Webcast Information

  • Compost Rule Team

The compost rule process
The Compost Rule Process

  • Why the rule revision?

  • What happens next?

The framework concept minn r 7035 2836 compost facilities
The Framework Concept: Minn. R. 7035.2836 Compost Facilities


  • Source Separated Organic Material (SSOM) must be source separated at the generator, not pulled from Mixed Municipal Solid Waste (MMSW) at a transfer station

  • Goal is not to develop overly prescriptive standards, but outcome based ones where possible

  • Portions of Demonstration Agreement (Buburl is most current version) will be used for rule

  • Guidance documents on some of the details (technical standards)


  • Stringency of requirements might need to reflect how broadly the materials are that a facility can accept:

    • If take everything in statute, need to be more protective

    • If just yard waste and food waste, then can be less protective

  • Stormwater management requirements are carried forward from existing rules

  • Industrial Stormwater permit required only if a discharge occurs, not if manage on site

    • If purchasing feedstock materials, will trigger permitting requirement


  • Currently, there is no standard requirement for Financial Assurance (FA), MPCA wants to reserve right to require FA based on site circumstances

  • Will continue with 503 standards

  • Not intended that animal manure will be part of feedstock

  • College backyard compost sites (Program Management Decision)

    • Have been taking animal waste

Subp 1 scope
Subp. 1. Scope

  • Modify scope to indicate owner or operator of a facility used to compost SSOM( ________________) must comply with the new rule track.

  • Feedstocks

    • Untreated woods can be used as a carbon source

    • No demolition debris (sheet rock, insulation, etc.)

    • What about manufactured wood?

Subp x location standards
Subp. X. Location Standards

  • Not on Karst

  • 5’ separation to water table

  • Flood plain? 7035.2555? Same as with composting.

  • No Buffer

Subp 8 design requirements
Subp. 8. Design Requirements

  • Size

    • ______Large (more requirements)

    • ______Small (less requirements)

  • Type

    • Windrows (aearated)

    • Static Piles (non-aerated)

Subp 8 design requirements1
Subp. 8. Design Requirements

  • Pad

    • Impermeable pad required only under certain circumstances

    • All weather work surface required (accessible for all seasons for turning)

Subp 8 design requirements2
Subp. 8. Design Requirements

  • Pad

    • Soil infiltration necessary and verified every 5?-10? years with soil boring

    • Curing pad (may not)/(will not) need impermeable surface (in reference to using soil as a form of leachate management)

Subp 9 operation requirements
Subp. 9. Operation Requirements

  • Immediate mixing of food waste with bulking agent by the end of the day

    • If not immediate, then place a biofilter on it

  • Odor Management Plan required

  • Sampling and Analysis plan

Subp 9 operation requirements2
Subp. 9. Operation Requirements

  • Training with ceu’s required over a certain size

    • Need training only if over a certain size

    • Add as a permit requirement?

    • Rule language or Guidance?

  • Page 4, item l – Use as needed Odor Management Plan item

  • Page 5, item r – Nitrogen to Carbon Ratios

Subp 10 compost classification
Subp. 10. Compost Classification

  • Readily available testing (bucket method & log of testing)

  • Acceptable testing methods for finished product

  • Maturity testing – Solvita

  • STA requirements – set methods?

  • page 4,item g test methods okay (Demonstration Agreement)

Subp 11 compost distribution end use
Subp. 11. Compost distribution & end use

  • Stay with plan language since most will produce a Class 1 compost