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<center><font size=3>'''Compost Specifications'''</font size><br>
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<font size=3>'''Compost Specifications'''</font size><br>
 
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Link to this [[Compost Specifications|table]]
Link to this [[Compost Specifications|table]]</center>
 
  
 
<table class="sortable">
 
<table class="sortable">
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<th>Range</th>
 
<th>Range</th>
 
</tr>
 
</tr>
 
 
<tr>
 
<tr>
 
<td>Source material/ Nutrient content</td>
 
<td>Source material/ Nutrient content</td>
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Potassium: 0.5 – 1</td>
 
Potassium: 0.5 – 1</td>
 
</tr>
 
</tr>
 
 
 
<tr>
 
<tr>
 
<td>Maturity</td>
 
<td>Maturity</td>
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<td>Seed emergence and seed vigor = minimum 80% relative to positive control</td>
 
<td>Seed emergence and seed vigor = minimum 80% relative to positive control</td>
 
</tr>
 
</tr>
 
 
 
<tr>
 
<tr>
 
<td>Stability</td>
 
<td>Stability</td>
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<td>CO2 evolution rate: < 8 milligrams CO2-C per grams organic matter per day</td>
 
<td>CO2 evolution rate: < 8 milligrams CO2-C per grams organic matter per day</td>
 
</tr>
 
</tr>
 
 
 
<tr>
 
<tr>
 
<td>pH</td>
 
<td>pH</td>
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<td>5.5 – 8.5</td>
 
<td>5.5 – 8.5</td>
 
</tr>
 
</tr>
 
 
 
<tr>
 
<tr>
 
<td>Soluble salts</td>
 
<td>Soluble salts</td>
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<td>Varies widely according to source materials for compost, but should be < 10 deciSiemen per meter (millimhos per centimeter)</td>
 
<td>Varies widely according to source materials for compost, but should be < 10 deciSiemen per meter (millimhos per centimeter)</td>
 
</tr>
 
</tr>
 
 
 
<tr>
 
<tr>
 
<td>Organic matter</td>
 
<td>Organic matter</td>
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<td>30-65% dry weight basis</td>
 
<td>30-65% dry weight basis</td>
 
</tr>
 
</tr>
 
 
 
<tr>
 
<tr>
 
<td>Particle size</td>
 
<td>Particle size</td>
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<td>Pass through 1-inch screen or less</td>
 
<td>Pass through 1-inch screen or less</td>
 
</tr>
 
</tr>
 
 
 
<tr>
 
<tr>
 
<td>Biological contaminants</td>
 
<td>Biological contaminants</td>
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<td>Meet or exceed US EPA Class A standards, 40 CFR Section 503.32(2) levels</td>
 
<td>Meet or exceed US EPA Class A standards, 40 CFR Section 503.32(2) levels</td>
 
</tr>
 
</tr>
 
 
 
<tr>
 
<tr>
 
<td>Physical contaminants</td>
 
<td>Physical contaminants</td>
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<td>< 1% dry weight basis</td>
 
<td>< 1% dry weight basis</td>
 
</tr>
 
</tr>
 
 
 
<tr>
 
<tr>
 
<td>Trace metals</td>
 
<td>Trace metals</td>
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Minn.R. 7035.2836, Subp. 6, (A)</td>
 
Minn.R. 7035.2836, Subp. 6, (A)</td>
 
</tr>
 
</tr>
 
 
 
 
</table>
 
</table>
 
 
 
 
  
 
[[category:Table]]
 
[[category:Table]]

Revision as of 23:33, 19 April 2017

Compost Specifications
Link to this table

Parameter Parameter Definition Range
Source material/ Nutrient content Typically biosolids/animal manure, source separated compostable materials or sorted yard wastes Nitrogen: 0.5 – 3

Phosphorus: 0.5 – 1.5

Potassium: 0.5 – 1
Maturity Level of completeness of the composting process Seed emergence and seed vigor = minimum 80% relative to positive control
Stability Biological activity in the composted material CO2 evolution rate: < 8 milligrams CO2-C per grams organic matter per day
pH Acidity/alkalinity 5.5 – 8.5
Soluble salts The amount of soluble ions in a solution of compost and water Varies widely according to source materials for compost, but should be < 10 deciSiemen per meter (millimhos per centimeter)
Organic matter The amount of carbon-based materials 30-65% dry weight basis
Particle size Size of particles Pass through 1-inch screen or less
Biological contaminants Pathogens (disease causing organisms) and weed seeds Meet or exceed US EPA Class A standards, 40 CFR Section 503.32(2) levels
Physical contaminants Man-made materials (like pieces of plastic or glass) that do not compose, also called ‘inerts’ < 1% dry weight basis
Trace metals Elements that can be toxic to humans, animals or plants Meet or exceed standards for Class I compost set in Minn.R. 7035.2836, Subp. 6, (A)