Sector-Specific Benchmark Values and Effluent Limitations: Sector - O. Discharges may be subject to requirements for more than one sector or subsector.
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|Subsector||Parameter||Benchmark Values||Effluent Limits|
|O1 Coal Fired and Oil Fired Steam Electric Generating Facilities||Solids, Total Suspended (TSS)||100 mg/L 1||Effluent Monitoring Not Required|
|Iron, Total (as Fe)||1.0 mg/L||Effluent Monitoring Not Required|
|O2 Nuclear, Natural Gas Fired, And Any Other Fuel Source Used For Steam Electric Generation||Solids, Total Suspended (TSS)||100 mg/L 1||Effluent Monitoring Not Required|
|O3 Runoff From Coal Storage Piles At Steam Electric Generating Facilities||Solids, Total Suspended (TSS)||Benchmark Monitoring Not Required||50 mg/L daily maximum 2|
|pH||Benchmark Monitoring Not Required||6.0 SU, instantaneous minimum 9.0 SU, instantaneous maximum|
1If 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.
2If the facility is designed, constructed, and operated to treat the volume of coal pile runoff that is associated with a 10-year, 24-hour rainfall event, any untreated overflow of coal pile runoff from the treatment unit is not subject to the 50 mg/L limitation for total suspended solids.