Sector-Specific Benchmark Values and Effluent Limitations: Sector F - Primary metals. Discharges may be subject to requirements for more than one sector or subsector.
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Subsector Parameter Benchmark Values
F1 Steel Works, Blast Furnaces, and Rolling and Finishing Mills Aluminum, Total (as Al) 1.5 mg/L
Zinc, Total (as Zn) 0.234 mg/L 1
Solids, Total Suspended (TSS) 100 mg/L 2
F2 Iron and Steel Foundries Aluminum, Total (as Al) 1.5 mg/L
Copper, Total (as Cu) 0.028 mg/L 1
Iron, Total (as Fe) 1.0 mg/L
Zinc, Total (as Zn) 0.234 mg/L 1
Solids, Total Suspended (TSS) 100 mg/L 2
F3 Rolling, Drawing, and Extruding of Nonferrous Metals Copper, Total (as Cu) 0.028 mg/L 1
Zinc, Total (as Zn) 0.234 mg/L 1
Solids, Total Suspended (TSS) 100 mg/L 2
F4 Nonferrous Foundries Copper, Total (as Cu) 0.028 mg/L 1
Zinc, Total (as Zn) 0.234 mg/L 1
Solids, Total Suspended (TSS) 100 mg/L 2
F5 Primary & Secondary Smelting and Refining of Nonferrous Metals and Miscellaneous Primary Metal Products Solids, Total Suspended (TSS) 100 mg/L 2

1The benchmark values of some metals are influenced by water hardness. For these parameters, the Permittee may determine the hardness of the stormwater discharges to identify the applicable ‘hardness range’ for determining their benchmark value. See Table 4 of Appendix B for hardness dependent benchmark values in accordance with Minn. R. 7050.0222 and Minn. R. 7052.0100.
2If the Permittee is required to comply with Appendix A, part F.1, the benchmark value for Solids, Total Suspended (TSS) is 65 mg/L, instead of 100 mg/L.

This page was last edited on 15 July 2015, at 14:43.