3890Compost

3890.1SCOPE

Provide compost Material for soil amendment for landscape planting or turf establishment.

3890.2REQUIREMENTS

Provide Material from vendors listed on the APL. Provide compost meeting one of the following sets of requirements: Option 1: The US Composting Council Seal of Testing Assurance (STA) Program requirements for animal or plant based feedstocks. Facilities accepting SSOM for composting are required to comply with the US Composting Council Seal of Testing Assurance Program. STA testing is optional for facilities accepting only leaves or yard waste. SSOM means compostable Materials in accordance with Minnesota Rules Part 7035.0300, Subp. 105a. Option 2: (Not Available for facilities accepting SSOM)

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determined by an ignition-loss analysis test method and any 1 additional test method including the Solvita test value of equal to or greater than 5. This means that the compost product has no offensive smell, no identifiable organic Materials , and will not reheat to more than 20°F above the ambient temperature.

process is verified by fecal coliform or Salmonella sp. tests, where applicable.

pieces from the plastic bags used to transport feedstocks to the composting facility, but will be considered acceptable if visible in the finished product.

inherent contaminants (Minnesota Rules Part 7035.2836 Subp. 6 Sec A), or the Code of Federal Regulations, Title 40, section 503.13(b)(3), amended for mercury. Provide compost that is registered for sale with the State of Minnesota . Do not mix the compost with Materials that do not comply with the Minnesota Rules, Chapter 7045 (Hazardous Waste). Compost must not exceed 10 percent of the Minnesota Pollution Control Agency's Superfund residential soil cleanup guidelines, termed Soil Reference Values or SRVs (i.e. 10 percent of individual chemical or chemical mixture Hazard Index, Hazard Quotient, or acceptable cancer risk level). Chemical contaminant, including pesticides, cannot be present in concentrations that would result in toxic effects to soil organisms, plants, or animals that reside in or on the composted soil areas or use the treated area for food or shelter . At the time of delivery to the Project, the compost shall be in a condition considered safe for exposure to dusts during handling.

A Grade 1 Compost Provide Grade 1 compost for use in turf establishment meeting the following requirements and characteristics:

Table 3890.2-1 Grade 1 Compost Requirements Requirement Range Organic matter content (dry weight) ≥ 30 percent C/N ratio 6:1-20:1 NPK ratios* (percent dry weight) 2:2:1-4:4:2 pH 5.5-8.0 Moisture content 35-55 percent Bulk density 700 pounds per cubic yard – 1,600 pounds per cubic yard Inert Material ≤ 3 percent at 0.15 inch Soluble salts ≤ 10 mmho per centimeter Germination testǁ 80-100 percent Screened particle size ≤ 3/4 inch * To obtain the nitrogen, phosphorus, or potassium levels specified, the compost may be fortified with commercial fertilizer. ǁ Germination test must list the species of cress, lettuce, or cucumber seed used. B Grade 2 Compost Provide Grade 2 compost as a landscape planting medium and meeting the following requirements:

Table 3890.2-2 Grade 2 Compost Requirements Requirement Range Organic matter content (dry weight) ≥ 30 percent C/N ratio 6:1-20:1 NPK ratios (Maximum percent dry weight) 1:1:1 pH 5.5-8.5 Moisture content 35-55 percent Bulk density 700 pounds per cubic yard – 1,600 pounds per cubic yard Inert material * < 3 percent at 0.15 inches Soluble salts ≤ 10 mmho per centimeter Germination test ǁ 80-100 percent Screened particle size ≤ 3/4 inch * Includes plastic bag shreds. ǁ Germination test must list the species of cress, cucumber, or lettuce seed used. C Grade 3 Compost Provide Grade 3 as a blend of Grade 2 compost and no greater than 10 percent Grade 1 compost.

3890.3SAMPLING AND TESTING

Follow Schedule of Materials Control. If federal or State chemical specific requirements conflict, provide compost meeting the most stringent requirement.