Difference between revisions of "Compost"

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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 certified to comply with mandatory Ontario Compost Quality Standards for Category ‘AA’ or ‘A’ Compost for concentrations of the 11 regulated metals, pathogens, foreign matter, maturity and labelling (OMOECC 2012) and Canadian Food and Inspection Agency (CFIA) regulations T-4-93 (CFIA 1997a) and T-4-120 (CFIA 1997b). </p>
[[File:Wood based compost.jpg|thumb|wood based compost]]
<p>Compost shall also be certified to meet quality parameters recommended under the Compost Council of Canada’s Compost Quality Alliance (CQA) certification program (A&L Canada Laboratories 2004) through testing by an accredited soil laboratory (OMAFRA 2016):  </p>
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.]


<table class = "table table-striped table-responsive">
<div class="toccolours mw-collapsible mw-collapsed">
<caption><strong>Specifications</strong></caption>
'''Specifications for category 'AA' product under Ontario Compost Quality Standards'''
<tr class ='success'><th>Parameter</th><th>Acceptable range</th></tr>
<div class="mw-collapsible-content">
<tr><td>pH</td><td>5.5 - 8.5</td></tr>
{| class="wikitable"
<tr><td>Soluble Salts (EC)</td><td>< 5 mS/cm</td></tr><tr><td>Moisture Content</td><td>< 50% by weight</td></tr>
!Parameter
<tr><td>Organic matter</td><td>> 30% by dry weight</td></tr>
!Acceptable range
<tr><td>C/N ratio</td><td>12 to 22</td></tr><tr> 
|-
<td>Pathogens</td><td>OMOECC 2012</td></tr>
|[[pH]]||5.5 - 8.5
<tr><td>Maturity</td><td>OMOECC 2012</td></tr>
|-
<tr><td>Particle size</td><td>100% < 12.7 mm (1/2”)</td></tr><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>
|[[Soluble Salts]] (EC)||< 4 mS/cm
<tr><td>Arsenic</td><td>≤ 13 mg/kg dry weight</td></tr>
|-
<tr><td>Cadmium</td><td>≤ 20 mg/kg dry weight</td></tr>
|Moisture Content||< 50% by weight
<tr><td>Chromium</td><td>≤ 210 mg/kg dry weight</td</tr>
|-
<tr><td>Cobalt</td><td>≤ 34 mg/kg dry weight</td></tr>
|[[Organic matter]]||> 30% by dry weight
<tr><td>Copper</td><td>≤ 400 mg/kg dry weight</td></tr>
|-
<tr><td>Lead</td><td>≤ 150 mg/kg dry weight</td></tr>
|C/N ratio||12 to 22
<tr><td>Mercury</td><td>≤ 0.8 mg/kg dry weight</td></tr>
|-
<tr><td>Molybdenum</td><td>≤ 5 mg/kg dry weight</td></tr>
|Pathogens||See: [https://www.ontario.ca/page/ontario-compost-quality-standards#section-2 MOECC 2012]
<tr><td>Nickel</td><td>≤ 62 mg/kg dry weight</td></tr><tr><td>Selenium</td><td>≤ 2 mg/kg dry weight</td></tr><tr>
|-
<td>Sodium, Percent Saturation</td><td>< 2%</td></tr>
|Maturity||See: [https://www.ontario.ca/page/ontario-compost-quality-standards#section-2 MOECC 2012]
<tr><td>Zinc</td><td>≤ 700 mg/kg dry weight</td></tr><tr>
|-
</table>
|Particle size||100% < 12.7 mm (1/2”)
 
|-
 
|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.
Where the custom calculated depth of compost amendment exceeds 7 centimetres (cm), or concentrations of any of the 11 regulated metals are near the maximum allowable limit, use Appendix 7 of Ontario Compost Quality Standards (OMOECC 2012) to determine the maximum application rate that will not exceed CFIA regulations for metals loading over a 45 year time period (CFIA 1997a). 
|-
 
|Arsenic||≤ 13 mg/kg dry weight
The Contractor shall submit to the Owner’s Representative a 4L sample, with laboratory testing results or quality assurance documentation certifying that the material or product meets the requirements.
|-
|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
|}
</div></div>
[[Category:materials]]
[[Category: testing]]

Latest revision as of 02:07, 9 March 2018

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 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

Decayed organic material used as a plant fertilizer. Compost helps to support healthy plant growth through the slow release of nutrients and the retention of moisture in the soil.

Sustainable Technologies Evaluation Program

Low Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.

Decayed organic material used as a plant fertilizer. Compost helps to support healthy plant growth through the slow release of nutrients and the retention of moisture in the soil.

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