Sector - O Sector - O

Sector-Specific Benchmark Values and Effluent Limitations: Sector - O. Discharges may be subject to requirements for more than one sector or subsector.
Link to this table

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.