Difference between revisions of "Compost"
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− | + | [[File:Wood based compost.jpg|thumb|wood based compost]] | |
+ | STEP are currently undertaking research into the quality of compost for use in LID installations. | ||
− | + | 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.] | |
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− | + | <div class="toccolours mw-collapsible mw-collapsed"> | |
− | + | '''Specifications for category 'AA' product under Ontario Compost Quality Standards''' | |
− | ! | + | <div class="mw-collapsible-content"> |
+ | {| class="wikitable" | ||
+ | !Parameter | ||
+ | !Acceptable range | ||
|- | |- | ||
− | |pH||5.5 - 8.5 | + | |[[pH]]||5.5 - 8.5 |
|- | |- | ||
− | |Soluble Salts (EC)||< 4 mS/cm | + | |[[Soluble Salts]] (EC)||< 4 mS/cm |
|- | |- | ||
|Moisture Content||< 50% by weight | |Moisture Content||< 50% by weight | ||
|- | |- | ||
− | |Organic matter||> 30% by dry weight | + | |[[Organic matter]]||> 30% by dry weight |
|- | |- | ||
|C/N ratio||12 to 22 | |C/N ratio||12 to 22 | ||
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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. | |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. | ||
+ | |- | ||
+ | |Arsenic||≤ 13 mg/kg dry weight | ||
+ | |- | ||
+ | |Cadmium||≤ 3 mg/kg dry weight | ||
+ | |- | ||
+ | |Chromium||≤ 210 mg/kg dry weight | ||
+ | |- | ||
+ | |Cobalt||≤ 34 mg/kg dry weight | ||
+ | |- | ||
+ | |Copper||≤ 100 mg/kg dry weight | ||
+ | |- | ||
+ | |Lead||≤ 150 mg/kg dry weight | ||
+ | |- | ||
+ | |Mercury||≤ 0.8 mg/kg dry weight | ||
+ | |- | ||
+ | |Molybdenum||≤ 5 mg/kg dry weight | ||
+ | |- | ||
+ | |Nickel||≤ 62 mg/kg dry weight | ||
+ | |- | ||
+ | |Selenium||≤ 2 mg/kg dry weight | ||
+ | |- | ||
+ | |Sodium, Percent Saturation||< 2% | ||
+ | |- | ||
+ | |Zinc||≤ 500 mg/kg dry weight | ||
|} | |} | ||
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− | </ | ||
[[Category:materials]] | [[Category:materials]] | ||
+ | [[Category: testing]] |
Latest revision as of 02:07, 9 March 2018
STEP are currently undertaking research into the quality of compost for use in LID installations.
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 Canada’s Compost Quality Alliance (CQA) certification program through testing by an OMAFRA accredited soil laboratory, and certified as category ‘AA’ under Ontario Compost Quality Standards.
Specifications for category 'AA' product under Ontario Compost Quality Standards
Parameter | Acceptable range |
---|---|
pH | 5.5 - 8.5 |
Soluble Salts (EC) | < 4 mS/cm |
Moisture Content | < 50% by weight |
Organic matter | > 30% by dry weight |
C/N ratio | 12 to 22 |
Pathogens | See: MOECC 2012 |
Maturity | See: MOECC 2012 |
Particle size | 100% < 12.7 mm (1/2”) |
Foreign Material | < 1.0% by dry weight > 3 mm < 0.5% plastic by dry weight no foreign matter > 25 mm per 500 mL no sharp foreign matter that could cause harm to humans or animals. |
Arsenic | ≤ 13 mg/kg dry weight |
Cadmium | ≤ 3 mg/kg dry weight |
Chromium | ≤ 210 mg/kg dry weight |
Cobalt | ≤ 34 mg/kg dry weight |
Copper | ≤ 100 mg/kg dry weight |
Lead | ≤ 150 mg/kg dry weight |
Mercury | ≤ 0.8 mg/kg dry weight |
Molybdenum | ≤ 5 mg/kg dry weight |
Nickel | ≤ 62 mg/kg dry weight |
Selenium | ≤ 2 mg/kg dry weight |
Sodium, Percent Saturation | < 2% |
Zinc | ≤ 500 mg/kg dry weight |