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<p>Compost shall be stable, humus-like material produced from the aerobic decomposition of organic feedstocks, composted and cured until maturity.  Compost shall be produced under the Compost Council of [http://www.compost.org/CQA-En.html| Canada’s Compost Quality Alliance] (CQA) certification program through testing by an [http://www.omafra.gov.on.ca/english/crops/resource/soillabs.htm| OMAFRA accredited soil laboratory], and certified as category ‘AA’ under [https://www.ontario.ca/page/ontario-compost-quality-standards#section-2| Ontario Compost Quality Standards.]</p>
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[[File:Wood based compost.jpg|thumb|wood based compost]]
<table class = "table table-striped table-responsive">
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STEP are currently undertaking research into the quality of compost for use in LID installations.
<caption><strong>Specifications for category 'AA' product under Ontario Compost Quality Standards</strong></caption>
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<tr class ='success'><th>Parameter</th><th>Acceptable range</th></tr>
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Compost shall be stable, humus-like material produced from the aerobic decomposition of organic feedstocks, composted and cured until maturity.  Compost shall be produced under the Compost Council of [http://www.compost.org/CQA-En.html Canada’s Compost Quality Alliance] (CQA) certification program through testing by an [http://www.omafra.gov.on.ca/english/crops/resource/soillabs.htm| OMAFRA accredited soil laboratory], and certified as category ‘AA’ under [https://www.ontario.ca/page/ontario-compost-quality-standards#section-2 Ontario Compost Quality Standards.]
<tr><td>pH</td><td>5.5 - 8.5</td></tr>
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<tr><td>Soluble Salts (EC)</td><td>< 4 mS/cm</td></tr>
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<div class="toccolours mw-collapsible mw-collapsed">
<tr><td>Moisture Content</td><td>< 50% by weight</td></tr>
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'''Specifications for category 'AA' product under Ontario Compost Quality Standards'''
<tr><td>Organic matter</td><td>> 30% by dry weight</td></tr>
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<div class="mw-collapsible-content">
<tr><td>C/N ratio</td><td>12 to 22</td></tr><tr> 
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{| class="wikitable"
<td>Pathogens</td><td>See: [https://www.ontario.ca/page/ontario-compost-quality-standards#section-2| MOECC 2012]</td></tr>
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!Parameter
<tr><td>Maturity</td><td>See: [https://www.ontario.ca/page/ontario-compost-quality-standards#section-2| MOECC 2012]</td></tr>
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!Acceptable range
<tr><td>Particle size</td><td>100% < 12.7 mm (1/2”)</td></tr>
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|-
<tr><td>Foreign Material</td><td>< 1.0% by dry weight > 3 mm<br>< 0.5% plastic by dry weight<br> no foreign matter > 25 mm per 500 mL<br> no sharp foreign matter that could cause harm to humans or animals.</td></tr>
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|[[pH]]||5.5 - 8.5
<tr><td>Arsenic</td><td>≤ 13 mg/kg dry weight</td></tr>
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|-
<tr><td>Cadmium</td><td>≤ 3 mg/kg dry weight</td></tr>
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|[[Soluble Salts]] (EC)||< 4 mS/cm
<tr><td>Chromium</td><td>≤ 210 mg/kg dry weight</td</tr>
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|-
<tr><td>Cobalt</td><td>≤ 34 mg/kg dry weight</td></tr>
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|Moisture Content||< 50% by weight
<tr><td>Copper</td><td>≤ 100 mg/kg dry weight</td></tr>
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|-
<tr><td>Lead</td><td>≤ 150 mg/kg dry weight</td></tr>
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|[[Organic matter]]||> 30% by dry weight
<tr><td>Mercury</td><td>≤ 0.8 mg/kg dry weight</td></tr>
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|-
<tr><td>Molybdenum</td><td>≤ 5 mg/kg dry weight</td></tr>
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|C/N ratio||12 to 22
<tr><td>Nickel</td><td>≤ 62 mg/kg dry weight</td>
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|-
</tr><tr><td>Selenium</td><td>≤ 2 mg/kg dry weight</td></tr><tr>
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|Pathogens||See: [https://www.ontario.ca/page/ontario-compost-quality-standards#section-2 MOECC 2012]
<td>Sodium, Percent Saturation</td><td>< 2%</td></tr>
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|-
<tr><td>Zinc</td><td>≤ 500 mg/kg dry weight</td></tr><tr>
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|Maturity||See: [https://www.ontario.ca/page/ontario-compost-quality-standards#section-2 MOECC 2012]
</table>
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|-
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|Particle size||100% < 12.7 mm (1/2”)
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|-
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|Foreign Material||< 1.0% by dry weight > 3 mm<br>< 0.5% plastic by dry weight<br> no foreign matter > 25 mm per 500 mL<br> no sharp foreign matter that could cause harm to humans or animals.
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|-
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|Arsenic||≤ 13 mg/kg dry weight
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|-
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|Cadmium||≤ 3 mg/kg dry weight
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|-
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|Chromium||≤ 210 mg/kg dry weight
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|-
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|Cobalt||≤ 34 mg/kg dry weight
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|-
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|Copper||≤ 100 mg/kg dry weight
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|-
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|Lead||≤ 150 mg/kg dry weight
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|-
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|Mercury||≤ 0.8 mg/kg dry weight
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|-
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|Molybdenum||≤ 5 mg/kg dry weight
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|-
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|Nickel||≤ 62 mg/kg dry weight
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|-
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|Selenium||≤ 2 mg/kg dry weight
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|-
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|Sodium, Percent Saturation||< 2%
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|-
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|Zinc||≤ 500 mg/kg dry weight
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|}
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</div></div>
 
[[Category:materials]]
 
[[Category:materials]]
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[[Category: testing]]
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