Metal and Diamond Mining Effluent Regulations
Version of the schedule from 2018-06-01 to 2021-05-31:
SCHEDULE 4(Paragraph 4(1)(a), subsection 13(1), paragraph 13(3)(a), subparagraph 22(c)(i) and paragraph 24(1)(a))
Authorized Limits of Deleterious Substances
| Column 1 | Column 2 | Column 3 | Column 4 | |
|---|---|---|---|---|
| Item | Deleterious Substance | Maximum Authorized Monthly Mean Concentration | Maximum Authorized Concentration in a Composite Sample | Maximum Authorized Concentration in a Grab Sample |
| 1 | Arsenic | 0.50 mg/L | 0.75 mg/L | 1.00 mg/L |
| 2 | Copper | 0.30 mg/L | 0.45 mg/L | 0.60 mg/L |
| 3 | Cyanide | 1.00 mg/L | 1.50 mg/L | 2.00 mg/L |
| 4 | Lead | 0.20 mg/L | 0.30 mg/L | 0.40 mg/L |
| 5 | Nickel | 0.50 mg/L | 0.75 mg/L | 1.00 mg/L |
| 6 | Zinc | 0.50 mg/L | 0.75 mg/L | 1.00 mg/L |
| 7 | Total Suspended Solids | 15.00 mg/L | 22.50 mg/L | 30.00 mg/L |
| 8 | Radium 226 | 0.37 Bq/L | 0.74 Bq/L | 1.11 Bq/L |
NOTE: All concentrations are total values.
- SOR/2006-239, s. 25
- SOR/2018-99, s. 32
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