Sector T - Treatment Works

T. Treatment Works

1. Authorized Stormwater Discharges

The requirements in Sector T apply to stormwater discharges associated with industrial activity from treatment works as identified by the industrial activity code specified in Table 5 of Appendix D.

2. Industrial Activities Authorized by Sector T

Permittees under Sector T are primarily engaged in treatment works treating domestic sewage, or any other sewage sludge or wastewater treatment device or system used in the storage, treatment, recycling, and reclamation of municipal or domestic sewage; including land dedicated to the disposal of sewage sludge; that are located within the confines of the facility with a design flow of 1.0 million gallons per day (MGD) or more; or are required to have an approved pretreatment program under 40 CFR pt. 403.

3. Limitations on Authorization

The following discharges are not authorized by this permit:

a. Sanitary and industrial wastewater.

b. Equipment and vehicle washwater.

c. Discharges from farm lands, domestic gardens, or lands used for sludge management where sludge is beneficially reused and which are not physically located within the facility, or areas that are in compliance with Section 405 of the CWA.

5. Stormwater Controls

a. Employee Training. The Permittee shall address the following during employee training:

1. Petroleum product management.

2. Process chemical management.

3. Fueling procedures.

4. Proper procedures for using fertilizer, herbicides, and pesticides.

b. Erosion and Sedimentation Controls (No additional requirements).

c. Good Housekeeping (No additional requirements).

d. Inspections.

The Permittee shall include the following areas in all inspections:

1. Access roads and rail lines.

2. Grit, screenings, and other solids handling.

3. Sludge drying beds.

4. Dried sludge piles.

5. Compost piles.

6. Septage or hauled waste receiving stations.

e. Preventive Maintenance (No additional requirements).

f. Spills and Leaks (No additional requirements).

g. Management of Runoff (No additional requirements).

h. Other Industry Specific Stormwater Control Measures (No additional requirements).

6. SWPPP Requirements

In addition to the requirements of Part IV, the Permittee shall also comply with the following:

a. Facility Map.

The Permittee shall identify where any of the following may be exposed to stormwater:

1. Handling, storage, or disposal areas for grit, screenings, and other solids.

2. Sludge drying beds.

3. Dried sludge piles.

4. Compost piles.

5. Septage or hauled waste receiving station.

6. Storage areas for process chemicals, petroleum products, solvents, fertilizers, herbicides, and pesticides.

b. Inventory of Exposed Materials (No additional requirements).

c. Potential Pollutant Sources.

The Permittee shall describe the following additional sources that have potential pollutants associated with them:

1. Grit, screenings, and other solids handling.

2. Sludge drying beds.

3. Dried sludge piles.

4. Compost piles.

5. Septage or hauled waste receiving station.

6. Access roads and rail lines.

d. Description of Stormwater Controls (No additional requirements).

7. Monitoring and Reporting Requirements In accordance with the monitoring requirements of Part V, the Permittee shall monitor the applicable parameters in Table T-1, below:

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

Subsector	Parameter	Benchmark Values
T1 - Treatment Works	Solids, Total Suspended (TSS)	100 mg/L 1
	BOD, Carbonaceous 05 Day (20 Deg C)	25 mg/L

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.

8. Use of Infiltration Devices and/or Industrial Stormwater Ponds for Stormwater Treatment and Disposal

Sector T industrial facilities are authorized to use designed infiltration devices or industrial stormwater ponds for stormwater management.