Compost
Revision as of 14:53, 8 August 2017 by Jenny Hill (talk | contribs)
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.
| 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</td |
| 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 |