Metal and Diamond Mining Effluent Regulations
Version of the schedule from 2021-06-01 to 2024-10-30:
SCHEDULE 4(Subsection 1(2), subparagraphs 4(1)(a)(i) and (ii), subsection 13(1), paragraph 13(3)(a), subparagraph 22(c)(i) and paragraph 24(1)(a))Maximum Authorized Concentrations of Prescribed Deleterious Substances
SCHEDULE 4(Subsection 1(2), subparagraphs 4(1)(a)(i) and (ii), subsection 13(1), paragraph 13(3)(a), subparagraph 22(c)(i) and paragraph 24(1)(a))Maximum Authorized Concentrations of Prescribed Deleterious Substances
TABLE 1
| Item | Column 1 | Column 2 | Column 3 | Column 4 |
|---|---|---|---|---|
| Deleterious Substance | Maximum Authorized Monthly Mean Concentration | Maximum Authorized Concentration in a Composite Sample | Maximum Authorized Concentration in a Grab Sample | |
| 1 | Arsenic | 0.10 mg/L | 0.15 mg/L | 0.20 mg/L |
| 2 | Copper | 0.10 mg/L | 0.15 mg/L | 0.20 mg/L |
| 3 | Cyanide | 0.50 mg/L | 0.75 mg/L | 1.00 mg/L |
| 4 | Lead | 0.08 mg/L | 0.12 mg/L | 0.16 mg/L |
| 5 | Nickel | 0.25 mg/L | 0.38 mg/L | 0.50 mg/L |
| 6 | Zinc | 0.40 mg/L | 0.60 mg/L | 0.80 mg/L |
| 7 | 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 |
| 9 | Un-ionized ammonia | 0.50 mg/L expressed as nitrogen (N) | Not applicable | 1.00 mg/L expressed as nitrogen (N) |
NOTE: The concentrations for items 1 to 8 are total values.
TABLE 2
| Item | Column 1 | Column 2 | Column 3 | Column 4 |
|---|---|---|---|---|
| Deleterious Substance | Maximum Authorized Monthly Mean Concentration | Maximum Authorized Concentration in a Composite Sample | Maximum Authorized Concentration in a Grab Sample | |
| 1 | Arsenic | 0.30 mg/L | 0.45 mg/L | 0.60 mg/L |
| 2 | Copper | 0.30 mg/L | 0.45 mg/L | 0.60 mg/L |
| 3 | Cyanide | 0.50 mg/L | 0.75 mg/L | 1.00 mg/L |
| 4 | Lead | 0.10 mg/L | 0.15 mg/L | 0.20 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 | 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 |
| 9 | Un-ionized ammonia | 0.50 mg/L expressed as nitrogen (N) | Not applicable | 1.00 mg/L expressed as nitrogen (N) |
NOTE: The concentrations for items 1 to 8 are total values.
- SOR/2006-239, s. 25
- SOR/2018-99, s. 32
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