NPDES MSGP Permit Part 8.pdf

2021 MSGP Part 8 – Sector-Specific Requirements

Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart A – Sector A – Timber Products

You must comply with Part 8 sector-specific requirements associated with your primary industrial activity and any co-located industrial activities, as defined in Appendix A. The sector- specific requirements apply to those areas of your facility where those sector-specific activities occur.

These sector-specific requirements are in addition to any requirements specified elsewhere in this permit.

8.A.1 Covered Stormwater Discharges

The requirements in Subpart A apply to stormwater discharges associated with industrial activity from Timber Products facilities as identified by the SIC Codes specified under Sector A in Table D- 1 of Appendix D of the permit.

8.A.2 Limitations on Coverage

8.A.3 Additional Technology-Based Effluent Limits

8.A.4 Additional SWPPP Requirements

8.A.5 Additional Inspection Requirements. (See also Part 3.1)

If your facility performs wood surface protection and preservation activities, inspect processing areas, transport areas, and treated wood storage areas monthly to assess the usefulness of practices to minimize the deposit of treatment chemicals on unprotected soils and in areas that will come in contact with stormwater discharges.

8.A.6 Indicator Monitoring (See also Part 4.2.1)

Table 8.A-1 identifies indicator monitoring that applies to the specific subsectors of Sector A. This indicator monitoring applies to both your primary industrial activity and any co-located industrial activities.

Table 8.A-1 Subsector

(You may be subject to requirements for more than one sector/subsector)

Indicator Monitoring Parameter

Indicator Monitoring Threshold

Applies to all Sector A (Subsectors A1, A2, A3, and A4) facilities with stormwater discharges from paved surfaces that will be initially sealed or re-sealed with coal-tar sealcoat where industrial activities are located during coverage under this permit

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/ No thresholds or baseline values

Applies to all Sector A (Subsectors A1, A2, A3, and A4) facilities that manufacture, use, or store creosote or creosote-treated wood in areas that are exposed to precipitation

Report Only/ No thresholds or baseline values

* Monitoring is required for the 16 individual PAHs identified at Appendix A to 40 CFR Part 423:

naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo[a]anthracene, chrysene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, benzo[g,h,i]perylene, indeno[1,2,3-c,d]pyrene, and dibenz[a,h]anthracene.

8.A.7 Sector-Specific Benchmarks (See also Part 4.2.2)

Table 8.A-2 identifies benchmarks that apply to the specific subsectors of Sector A. These benchmarks apply to both your primary industrial activity and any co-located industrial activities.

Table 8.A-2 Subsector

(You may be subject to requirements for more than one sector/subsector)

Parameter Benchmark Monitoring

Concentration Subsector A1. General Sawmills and Planing Mills

(SIC 2421)

Chemical Oxygen Demand (COD)

120.0 mg/L

Total Suspended Solids

(TSS)

100 mg/L

Total Recoverable Zinc (freshwater)1

Hardness Dependent

Total Recoverable Zinc (saltwater)2

90 µg/L

Subsector A2. Wood Preserving (SIC 2491) Total Recoverable Arsenic (freshwater) Total Recoverable Arsenic (saltwater)1

150 µg/L

69 µg/L

Total Recoverable Copper (freshwater)

5.19 µg/L

Total Recoverable Copper (saltwater)2

4.8 µg/L

Subsector A3. Log Storage and Handling

(SIC 2411)

Total Suspended Solids (TSS)

100 mg/L

Subsector A4. Hardwood Dimension and Flooring Mills; Special Products Sawmills, not elsewhere classified; Millwork, Veneer, Plywood, and Structural Wood; Wood Pallets and Skids; Wood Containers, not elsewhere classified; Wood Buildings and Mobile Homes; Reconstituted Wood Products; and Wood Products Facilities not elsewhere classified (SIC 2426, 2429, 2431- 2439 (except 2434), 2441, 2448, 2449, 2451, 2452, 2493, and 2499)

Chemical Oxygen Demand (COD)

120.0 mg/L

Total Suspended Solids (TSS)

100.0 mg/L

1 The freshwater benchmark values of some metals are dependent on water hardness. For these parameters, permittees must determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for Hardness Dependent Metals,” for methodology), in accordance with Part 4.2.2.1, to identify the applicable ‘hardness range’ for determining their benchmark value applicable to their facility. Hardness Dependent Benchmarks follow in the table below:

Freshwater Hardness Range Zinc

0-24.99 mg/L 37 25-49.99 mg/L 52 50-74.99 mg/L 80 75-99.99 mg/L 107 100-124.99 mg/L 132 125-149.99 mg/L 157 150-174.99 mg/L 181

175-199.99 mg/L 204 200-224.99 mg/L 227

225-249.99 mg/L 249 250+ mg/L 260

2 Saltwater benchmark values apply to stormwater discharges into saline waters where indicated.

8.A.8 Effluent Limitations Based on Effluent Limitations Guidelines. (See also Part 4.2.3)

Table 8.A-3 identifies effluent limits that apply to the industrial activities described below.

Compliance with these effluent limits is to be determined based on discharges from these industrial activities independent of commingling with any other waste streams that may be covered under this permit.

Table 8.A-31

Industrial Activity Paramete

Effluent Limitation Discharges resulting from spray down or intentional wetting of logs at wet deck storage areas pH 6.0 - 9.0 s.u Debris (woody material such as bark, twigs, branches, heartwood, or sapwood)

No discharge of debris that will not pass through a 2.54-cm (1-in.) diameter round

1 Monitor annually.

Part 8 – Sector-Specific Requirements for Industrial Activity

– Sector B – Paper and Allied Products

You must comply with Part 8 sector-specific requirements associated with your primary industrial activity and any co-located industrial activities, as defined in Appendix A. The sector- specific requirements apply to those areas of your facility where those sector-specific activities occur.

These sector-specific requirements are in addition to any requirements specified elsewhere in this permit.

8.B.1 Covered Stormwater Discharges

The requirements in Subpart B apply to stormwater discharges associated with industrial activity from Paper and Allied Products Manufacturing facilities, as identified by the SIC Codes specified under Sector B in Table D-1 of Appendix D of the permit.

8.B.2 Indicator Monitoring (See also Part 4.2.1)

Table 8.B-1 identifies indicator monitoring that applies to the specific subsectors of Sector B. This indicator monitoring applies to both your primary industrial activity and any co-located industrial activities.

Table 8.B-1 Subsector

(You may be subject to requirements for more than one sector/subsector)

Indicator Monitoring Parameter

Indicator Monitoring Threshold

Applies to all Sector B (Subsectors B1 and B2) facilities with stormwater discharges from paved surfaces that will be initially sealed or re-sealed with coal-tar sealcoat where industrial activities are located during coverage under this permit

Report Only/ No thresholds or baseline values

Subsector B2. Pulp Mills (SIC Code 2611); Paper Mills (SIC Code 2621); Paperboard Containers and Boxes (SIC Code 2652-2657); Converted Paper and Paperboard Products, Except Containers and Boxes (SIC Code 2671-2679)

Chemical Oxygen Demand (COD)

Report Only/ No thresholds or baseline values

Total Suspended Solids (TSS)

Report Only/ No thresholds or baseline values pH Report Only/ No thresholds or baseline values

* Monitoring is required for the 16 individual PAHs identified at Appendix A to 40 CFR Part 423:

naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, 8.B.3 Sector-Specific Benchmarks (See also Part 4.2.2)

Table 8.B-2 identifies benchmarks that apply to the specific subsectors of Sector B. These benchmarks apply to both your primary industrial activity and any co-located industrial

Table 8.B-2.

Subsector (You may be subject to requirements for more than one sector/subsector)

Parameter

Benchmark Monitoring

Concentration

Subsector B1. Paperboard Mills (SIC Code 2631)

Chemical Oxygen Demand (COD)

120 mg/L

Part 8 – Sector-Specific Requirements for Industrial Activity

– Sector C – Chemical and Allied Products Manufacturing, and Refining

You must comply with Part 8 sector-specific requirements associated with your primary industrial activity and any co-located industrial activities, as defined in Appendix A. The sector- specific requirements apply to those areas of your facility where those sector-specific activities occur.

These sector-specific requirements are in addition to any requirements specified elsewhere in this permit.

8.C.1 Covered Stormwater Discharges

The requirements in Subpart C apply to stormwater discharges associated with industrial activity from Chemical and Allied Products Manufacturing, and Refining facilities, as identified by the SIC Codes specified under Sector C in Table D-1 of Appendix D of the permit.

8.C.2 Limitations on Coverage

8.C.3 Indicator Monitoring (See also Part 4.2.1)

Table 8.C-1 identifies indicator monitoring that applies to the specific subsectors of Sector C. This indicator monitoring applies to both your primary industrial activity and any co-located industrial activities.

Table 8.C-1 Subsector

(You may be subject to requirements for more than one sector/subsector)

Indicator Monitoring Parameter

Indicator Monitoring Threshold

Applies to all Sector C (Subsectors C1, C2, C3, C4, and C5) facilities with stormwater discharges from paved surfaces that will be initially sealed or re-sealed with coal-tar sealcoat where industrial activities are located during coverage under this permit

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/ No thresholds or baseline values

Table 8.C-1 Subsector

(You may be subject to requirements for more than one sector/subsector)

Indicator Monitoring Parameter

Indicator Monitoring Threshold

Subsector C5. Medicinal Chemicals and Botanical Products; Pharmaceutical Preparations; in vitro and in vivo Diagnostic Substances; and Biological Products, Except Diagnostic Substances (SIC Code 2833-2836); Paints, Varnishes, Lacquers, Enamels, and Allied Products (SIC Code 2851); Industrial Organic Chemicals (SIC Code 2861-2869); Miscellaneous Chemical Products (SIC Code 2891-2899); Inks and Paints, Including China Painting Enamels, India Ink, Drawing Ink, Platinum Paints for Burnt Wood or Leather Work, Paints for China Painting, Artist’s Paints and Artist’s Watercolors (SIC Code 3952 (limited to list of inks and paints)); Petroleum Refining (SIC Code 2911)

Chemical Oxygen Demand

(COD)

Report Only/ No thresholds or baseline values

Total Suspended Solids (TSS) Report Only/ No thresholds or baseline values pH Report Only/ No thresholds or baseline values

Subsector C5. Petroleum Refining (SIC Code 2911)

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/ No thresholds or baseline values

* Monitoring is required for the 16 individual PAHs identified at Appendix A to 40 CFR Part 423:

naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, 8.C.4 Sector-Specific Benchmarks (See also Part 4.2.2)

Table 8.C-2 identifies benchmarks that apply to the specific subsectors of Sector C. These benchmarks apply to both your primary industrial activity and any co-located industrial activities.

Table 8.C-2.

Subsector (You may be subject to requirements for more than one sector/subsector)

Parameter Benchmark Monitoring

Concentration Subsector C1. Agricultural Chemicals (SIC 2873-2879)

Nitrate plus Nitrite Nitrogen

0.68 mg/L

Total Recoverable Lead (freshwater)2 Total Recoverable Lead (saltwater)1

Hardness Dependent

210 µg/L

Total Recoverable Zinc (freshwater)2 Total Recoverable Zinc (saltwater)1

Hardness Dependent

90 µg/L

Total Phosphorus 2.0 mg/L

Table 8.C-2.

Subsector (You may be subject to requirements for more than one sector/subsector)

Parameter Benchmark Monitoring

Concentration Subsector C2. Industrial Inorganic Chemicals (SIC 2812-2819)

Total Recoverable Aluminum

1,100 µg/L

Nitrate plus Nitrite Nitrogen

0.68 mg/L

Subsector C3. Soaps, Detergents, Cosmetics, and Perfumes (SIC 2841-2844)

Nitrate plus Nitrite Nitrogen

0.68 mg/L

Total Recoverable Zinc (freshwater)2 Total Recoverable Zinc (saltwater)1

Hardness Dependent

90 µg/L

Subsector C4. Plastics, Synthetics, and Resins (SIC 2821-2824)

Total Recoverable Zinc (freshwater)2 Total Recoverable Zinc (saltwater)1

Hardness Dependent

90 µg/L

1 Saltwater benchmark values apply to stormwater discharges into saline waters where indicated.

2 The freshwater benchmark values of some metals are dependent on water hardness. For these parameters, permittees must determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for Hardness Dependent Metals,” for methodology), in accordance with Part 4.2.2.1, to identify the applicable ‘hardness range’ for determining their benchmark value applicable to their facility. Hardness Dependent Benchmarks follow in the table below:

Freshwater Hardness Range

Lead

(µg/L)

Zinc

(µg/L)

0-24.99 mg/L 14 37 25-49.99 mg/L 24 52 50-74.99 mg/L 45 80 75-99.99 mg/L 69 107 100-124.99 mg/L 95 132 125-149.99 mg/L 123

150-174.99 mg/L 152 181 175-199.99 mg/L 182 204

200-224.99 mg/L 213 227 225-249.99 mg/L 246 249 250+ mg/L 262 260

8.C.5 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 4.2.3.1)

Table 8.C-3 identifies effluent limits that apply to the industrial activities described below.

Compliance with these effluent limits is to be determined based on discharges from these industrial activities independent of commingling with any other waste streams that may be covered under this permit.

Table 8.C-31

Industrial Activity Parameter Effluent Runoff from phosphate fertilizer manufacturing facilities that comes into contact with any raw materials, finished product, by-products or waste products (SIC 2874)

Total Phosphorus (as P) 105.0 mg/L, daily maximum 35 mg/L, 30-day avg.

Fluoride 75.0 mg/L, daily maximum

25.0 mg/L, 30-day avg.

1 Monitor annually.

Part 8 – Sector-Specific Requirements for Industrial Activity

– Sector D – Asphalt Paving and Roofing Materials and Lubricant Manufacturing

You must comply with Part 8 sector-specific requirements associated with your primary industrial activity and any co-located industrial activities, as defined in Appendix A. The sector- specific requirements apply to those areas of your facility where those sector-specific activities occur.

These sector-specific requirements are in addition to any requirements specified elsewhere in this permit.

8.D.1 Covered Stormwater Discharges

The requirements in Subpart D apply to stormwater discharges associated with industrial activity from Asphalt Paving and Roofing Materials and Lubricant Manufacturing facilities, as identified by the SIC Codes specified under Sector D in Table D-1 of Appendix D of the permit.

8.D.2 Limitations on Coverage

The following stormwater discharges associated with industrial activity are not authorized by this permit (see also Part 1.1.3):

The following stormwater discharges associated with industrial activity are not authorized under Sector D:

8.D.3 Indicator Monitoring (See also Part 4.2.1)

Table 8.D-1 identifies indicator monitoring that applies to the specific subsectors of Sector D. This indicator monitoring applies to both your primary industrial activity and any co-located industrial activities.

Table 8.D-1 Subsector

(You may be subject to requirements for more than one sector/subsector)

Indicator Monitoring Parameter

Indicator Monitoring Threshold

Applies to all Sector D (Subsectors D1 and D2) facilities with stormwater discharges from paved surfaces that will be initially sealed or re-sealed with coal-tar sealcoat where industrial activities are located during coverage under this permit

Report Only/ No thresholds or baseline values

Subsector D1. Asphalt Paving and Roofing Materials (SIC Code 2951, 2952)

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/

Table 8.D-1 Subsector

(You may be subject to requirements for more than one sector/subsector)

Indicator Monitoring Parameter

Indicator Monitoring Threshold

Subsector D2. Miscellaneous Products of Petroleum and Coal (SIC Code 2992, 2999)

Chemical Oxygen Demand

(COD)

Report Only/ No thresholds or baseline values

Total Suspended Solids (TSS) Report Only/ No thresholds or baseline values pH Report Only/ No thresholds or baseline values

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/ No thresholds or baseline values

* Monitoring is required for the 16 individual PAHs identified at Appendix A to 40 CFR Part 423:

naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, 8.D.4 Sector-Specific Benchmarks (See also Part 4.2.2)

Table 8.D-2 identifies benchmarks that apply to the specific subsectors of Sector D. These benchmarks apply to both your primary industrial activity and any co-located industrial activities.

Table 8.D-2.

Subsector Parameter Benchmark Monitoring Concentration

Subsector D1. Asphalt Paving and Roofing Materials (SIC 2951, 2952)

Total Suspended Solids

(TSS)

100 mg/L

8.D.5 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 4.2.3.1)

Table 8.D-3 identifies effluent limitations that apply to the industrial activities described below.

Compliance with these effluent limitations is to be determined based on discharges from these industrial activities independent of commingling with any other waste streams that may be covered under this permit.

Table 8.D-31

Industrial Activity Parameter Effluent Limitation Discharges from asphalt emulsion facilities. Total Suspended Solids

(TSS)

23.0 mg/L, daily maximum

15.0 mg/L, 30-day avg.

pH 6.0 - 9.0 s.u.

Oil and Grease 15.0 mg/L, daily maximum 10 mg/L, 30-day avg.

1Monitor annually.

Part 8 – Sector-Specific Requirements for Industrial Activity

– Sector E – Glass, Clay, Cement, Concrete, and Gypsum Products

You must comply with Part 8 sector-specific requirements associated with your primary industrial activity and any co-located industrial activities, as defined in Appendix A. The sector- specific requirements apply to those areas of your facility where those sector-specific activities occur.

These sector-specific requirements are in addition to any requirements specified elsewhere in this permit.

8.E.1 Covered Stormwater Discharges

The requirements in Subpart E apply to stormwater discharges associated with industrial activity from Glass, Clay, Cement, Concrete, and Gypsum Products facilities, as identified by the SIC Codes specified under Sector E in Table D-1 of Appendix D of the permit.

8.E.2 Additional Technology-Based Effluent Limits

8.E.3 Additional SWPPP Requirements

8.E.4 Indicator Monitoring. (See also Part 4.2.1)

Table 8.E-1 identifies indicator monitoring that applies to the specific subsectors of Sector E. This indicator monitoring applies to both your primary industrial activity and any co-located industrial

Table 8.E-1 Subsector

(You may be subject to requirements for more than one sector/subsector)

Indicator Monitoring Parameter

Indicator Monitoring Threshold

Applies to all Sector E (Subsectors E1, E2, and E3) facilities with stormwater discharges from paved surfaces that will be initially sealed or re-sealed with coal-tar sealcoat where industrial activities are located during your coverage under this permit

Report Only/ No thresholds or baseline values

Subsector E3. Flat Glass (SIC Code 3211);

Glass and Glassware, Pressed or Blown (SIC Code 3221, 3229); Glass Products Made of Purchased Glass (SIC Code 3231); Hydraulic Cement (SIC Code 3241); Cut Stone and Stone Products (SIC Code 3281); Abrasive, Asbestos, and Miscellaneous Nonmetallic Mineral Products (SIC Code 3291-3299)

Chemical Oxygen Demand (COD)

Report Only/ No thresholds or baseline values

Total Suspended Solids

(TSS)

Report Only/ No thresholds or baseline values pH Report Only/ No thresholds or baseline values

* Monitoring is required for the 16 individual PAHs identified at Appendix A to 40 CFR Part 423:

naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, 8.E.5 Sector-Specific Benchmarks (See also Part 4.2.2)

Table 8.E-2 identifies benchmarks that apply to the specific subsectors of Sector E. These benchmarks apply to both your primary industrial activity and any co-located industrial activities.

Table 8.E-2.

Subsector

(You may be subject to requirements for more than one sector/subsector)

Parameter Benchmark Monitoring Concentration

Subsector E1. Clay Product Manufacturers

(SIC 3251-3259, 3261-3269)

Total Recoverable Aluminum

1,100 µg/L

Subsector E2. Concrete and Gypsum Product Manufacturers (SIC 3271-3275)

Total Suspended Solids

(TSS)

100 mg/L

8.E.6 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 4.2.3.1)

Table 8.E-3 identifies effluent limits that apply to the industrial activities described below.

Compliance with these limits is to be determined based on discharges from these industrial activities independent of commingling with any other waste streams that may be covered under this permit.

Table 8.E-31

Industrial Activity Parameter Effluent Limitation Discharges from material storage piles at cement manufacturing facilities (SIC 3241)

Total Suspended Solids (TSS) 50 mg/L, daily maximum2 pH 6.0 - 9.0 s.u.2

1 Monitor annually.

2 Any untreated overflow from facilities designed, constructed and operated to treat the volume of stormwater from materials storage piles which is associated with a 10-year, 24-hour rainfall event shall not be subject to the pH and TSS limitations (40 CFR 411.32(b)).

Part 8 – Sector-Specific Requirements for Industrial Activity

– Sector F – Primary Metals

You must comply with Part 8 sector-specific requirements associated with your primary industrial activity and any co-located industrial activities, as defined in Appendix A. The sector- specific requirements apply to those areas of your facility where those sector-specific activities occur.

These sector-specific requirements are in addition to any requirements specified elsewhere in this permit.

8.F.1 Covered Stormwater Discharges

The requirements in Subpart F apply to stormwater discharges associated with industrial activity from Primary Metals facilities, as identified by the SIC Codes specified under Sector F in Table D-1 of Appendix D of the permit.

8.F.2 Additional Technology-Based Effluent Limits

Stabilize unpaved areas using vegetation or paving where there is vehicle traffic or where material loading and unloading, storage, handling and processing occurs, unless feasible.

For paved areas of the facility where particulate matter, dust or debris may accumulate, to minimize the discharge of pollutants in stormwater, implement control measures such as the following, where determined to be feasible (list not exclusive): sweeping or vacuuming at regular intervals; and washing down the area and collecting and/or treating and properly disposing of the washdown water. For unstabilized areas or for stabilized areas where sweeping, vacuuming, or washing down is not possible, to minimize the discharge of particulate matter, dust, or debris or other pollutants in stormwater, implement stormwater management devices such as the following, where determined to be feasible (list not exclusive): sediment traps, vegetative buffer strips, filter fabric fence, sediment filtering boom, gravel outlet protection, and other equivalent measures that effectively trap or remove sediment.

8.F.3 Additional SWPPP Requirements

8.F.4 Additional Inspection Requirements (See also Part 3.1)

As part of conducting your routine facility inspections at least quarterly (Part 3.1), address all potential sources of pollutants, including (if applicable) air pollution control equipment (e.g., baghouses, electrostatic precipitators, scrubbers, cyclones), for any signs of degradation (e.g., leaks, corrosion, improper operation) that could limit their efficiency and lead to excessive emissions. Consider monitoring air flow at inlets and outlets (or use equivalent measures) to check for leaks (e.g., particulate deposition) or blockage in ducts. Also inspect all process and material handling equipment (e.g., conveyors, cranes and vehicles) for leaks, drips, or the potential loss of material; and material storage areas (e.g., piles, bins, or hoppers for storing coke, coal, scrap or slag, as well as chemicals stored in tanks and drums) for signs of material losses due to wind or stormwater.

8.F.5 Indicator Monitoring (See also Part 4.2.1)

Table 8.F-1 identifies indicator monitoring that applies to the specific subsectors of Sector F. This indicator monitoring applies to both your primary industrial activity and any co-located industrial activities.

Table 8.F-1 Subsector

(You may be subject to requirements for more than one sector/subsector)

Indicator Monitoring Parameter

Indicator Monitoring Threshold

Applies to all Sector F (Subsectors F1, F2, F3, F4, and F5) facilities with stormwater discharges from paved surfaces that will be initially sealed or re-sealed with coal-tar sealcoat where industrial activities are located during coverage under this permit

Report Only/ No thresholds or baseline values

Subsector F1. Steel Works, Blast Furnaces, and Rolling and Finishing Mills (SIC Code 3312-3317)

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/ No thresholds or baseline values

Subsector F2. Iron and Steel Foundries (SIC Code 3321-3325)

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/ No thresholds or baseline values

Subsector F3. Rolling, Drawing, and Extruding of Nonferrous Metals (SIC Code 3351-3357)

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/ No thresholds or baseline values

Subsector F4. Nonferrous Foundries (Castings) (SIC Code 3363-3369)

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/

Table 8.F-1 Subsector

(You may be subject to requirements for more than one sector/subsector)

Indicator Monitoring Parameter

Indicator Monitoring Threshold

Subsector F5. Primary Smelting and Refining of Nonferrous Metals (SIC Code 3331-3339); Secondary Smelting and Refining of Nonferrous Metals (SIC Code 3341); Miscellaneous Primary Metal Products (SIC Code 3398, 3399)

Chemical Oxygen Demand (COD)

Report Only/ No thresholds or baseline values

Total Suspended Solids

(TSS)

Report Only/ No thresholds or baseline values pH Report Only/ No thresholds or baseline values

Polycyclic Aromatic Hydrocarbons (PAHs)*

Report Only/ No thresholds or baseline values

* Monitoring is required for the 16 individual PAHs identified at Appendix A to 40 CFR Part 423:

naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, 8.F.6 Sector-Specific Benchmarks (See also Part 4.2.2)

Table 8.F-2 identifies benchmarks that apply to the specific subsectors of Sector F. These benchmarks apply to both your primary industrial activity and any co-located industrial activities.

Table 8.F-2.

Subsector

(You may be subject to requirements for more than one sector/subsector)

Parameter Benchmark Monitoring

Concentration Subsector F1. Steel Works, Blast Furnaces, and Rolling and Finishing Mills

(SIC 3312-3317)

Total Recoverable Aluminum

1,100 µg/L

Total Recoverable Zinc (freshwater)2

Total Recoverable Zinc (saltwater)1

Hardness Dependent

90 µg/L

Subsector F2. Iron and Steel Foundries (SIC 3321-3325)

Total Recoverable Aluminum

1,100 µg/L

Total Suspended Solids (TSS) 100 mg/L Total Recoverable Copper (freshwater)

Total Recoverable Copper (saltwater)1

5.19 µg/L

4.8 µg/L

Total Recoverable Zinc (freshwater)2

Total Recoverable Zinc (saltwater)1

Hardness Dependent

90 µg/L

Table 8.F-2.

Subsector

(You may be subject to requirements for more than one sector/subsector)

Parameter Benchmark Monitoring

Concentration Subsector F3. Rolling, Drawing, and Extruding of Nonferrous Metals

(SIC 3351-3357)

Total Recoverable Copper (freshwater)

Total Recoverable Copper (saltwater)1

5.19 µg/L

4.8 µg/L

Total Recoverable Zinc (freshwater)2

Total Recoverable Zinc (saltwater)1

Hardness Dependent

90 µg/L

Subsector F4. Nonferrous Foundries (SIC 3363-3369)

Total Recoverable Copper (freshwater)

Total Recoverable Copper (saltwater)1

5.19 µg/L

4.8 µg/L

Total Recoverable Zinc (freshwater)2

Total Recoverable Zinc (saltwater)1

Hardness Dependent 90 µg/L

1 Saltwater benchmark values apply to stormwater discharges into saline waters where indicated.

2 The freshwater benchmark values of some metals are dependent on water hardness. For these parameters, permittees must determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for Hardness Dependent Metals,” for methodology), in accordance with Part 4.2.2.1, to identify the applicable ‘hardness range’ for determining their benchmark value applicable to their facility. Hardness Dependent Benchmarks follow in the table below:

Freshwater Hardness Range Zinc

0-24.99 mg/L 37

25-49.99 mg/L 52 50-74.99 mg/L 80 75-99.99 mg/L 107 100-124.99 mg/L 132 125-149.99 mg/L 157 150-174.99 mg/L 181

175-199.99 mg/L 204 200-224.99 mg/L 227 225-249.99 mg/L 249

250+ mg/L 260

Part 8 – Sector-Specific Requirements for Industrial Activity

– Sector G – Metal Mining

You must comply with Part 8 sector-specific requirements associated with your primary industrial activity and any co-located industrial activities, as defined in Appendix A. The sector- specific requirements apply to those areas of your facility where those sector-specific activities occur.

These sector-specific requirements are in addition to any requirements specified elsewhere in this permit.

Note: Where compliance with a requirement in a separate exploration permit, mining permit, reclamation plan, Surface Mining Control and Reclamation Act (SMCRA) requirements, etc. will result in you fully meeting any requirement in this Subpart, you are considered to have complied with the relevant requirement in this Subpart. You must include documentation in your SWPPP describing your rationale for concluding that any particular action on your part is sufficient to comply with the corresponding requirement in this Subpart.

8.G.1 Covered Stormwater Discharges

The requirements in Subpart G apply to stormwater discharges associated with industrial activity from Metal Mining facilities, including mines abandoned on Federal lands, as identified by the SIC Codes specified under Sector G in Table D-1 of Appendix D. Coverage is required for metal mining facilities that discharge stormwater contaminated by contact with, or that has come into contact with, any overburden, raw material, intermediate product, finished product, byproduct, or waste product located on the site of the operation.

• Waste rock and overburden piles if composed entirely of stormwater and not combined with mine drainage;

• Topsoil piles;

• Offsite haul and access roads;

• Onsite haul and access roads constructed of waste rock, overburden or spent ore if composed entirely of stormwater and not combining with mine drainage;

• Onsite haul and access roads not constructed of waste rock, overburden or spent ore except if mine drainage is used for dust control;

• Discharges from tailings dams or dikes when not constructed of waste rock or tailings and no process fluids are present;

• Discharges from tailings dams or dikes when constructed of waste rock or tailings and no process fluids are present, if composed entirely of stormwater and not combining with mine drainage;

• Concentration building if no contact with material piles;

• Mill site if no contact with material piles;

• Office or administrative building and housing if mixed with stormwater from industrial area;

• Chemical storage area;

• Docking facility if no excessive contact with waste product that would otherwise constitute mine drainage;

• Explosive storage;

• Fuel storage;

• Vehicle and equipment maintenance area and building;

• Parking areas (if necessary);

• Power plant;

• Truck wash areas if no excessive contact with waste product that would otherwise constitute mine drainage;

• Unreclaimed, disturbed areas outside of active mining area;

• Reclaimed areas released from reclamation requirements prior to December 17, 1990;

• Partially or inadequately reclaimed areas or areas not released from reclamation requirements.

8.G.2 Limitations on Coverage

Note: Stormwater discharges from these sources are subject to 40 CFR Part 440 if they are mixed with other discharges subject to Part 440. In this case, they are not eligible for coverage under this permit. Discharges from overburden/waste rock and overburden/waste rock-related areas are not subject to 40 CFR Part 440 unless they: drain naturally (or are intentionally diverted) to a point source;

and (2) combine with ''mine drainage'' that is otherwise regulated under the Part 440 regulations. For such sources, coverage under this permit would be available if the discharge composed entirely of stormwater does not combine with other sources of mine drainage that are not subject to 40 CFR Part 440, and meets the other eligibility criteria contained in Part 1.1 of the permit. Operators bear the initial responsibility for determining if they are eligible for coverage under this permit, or must seek coverage under another NPDES permit. EPA recommends that operators contact the relevant NPDES permit issuance authority for assistance to determine the nature and scope of the ''active mining area'' on a mine-by-mine basis, as well as to determine the appropriate permitting mechanism for authorizing such discharges.

8.G.3 Definitions

The following definitions are not intended to supersede the definitions of active and inactive mining facilities established by 40 CFR 122.26(b)(14)(iii).

a. activities performed for purposes of mine site preparation, including: cutting new rights of way (except when related to access road construction);

providing access to a mine site for vehicles and equipment (except when related to access road construction); other earth disturbances associated with site preparation activities on any areas where active mining activities have not yet commenced (e.g., for heap leach pads, waste rock facilities, tailings impoundments, wastewater treatment plants); and

b. construction of staging areas to prepare for erecting structures such as to house project personnel and equipment, mill buildings, etc., and construction of access roads. Earth-disturbing activities associated with the construction of staging areas and the construction of access roads conducted prior to active mining are considered to be “construction” and have additional effluent limits in Part 8.G.4.2.

Note: Earth-disturbing activities described in the definition in Part 8.G.3.2 that occur on areas outside the active mining area (e.g., for expansion of the mine into undeveloped territory) are considered “earth-disturbing conducted prior to active mining activities”, and must comply with the requirements in Part 8.G.4.

8.G.4 Requirements Applicable to Earth-Disturbing Activities Conducted Prior to Active Mining Activities

Stormwater discharges from earth-disturbing activities conducted prior to active mining activities (defined in Part 8.G.3.2) are covered under this permit. For such earth-disturbing activities, you must comply with all applicable requirements in Parts 1-9 of the MSGP except for the technology-based effluent limits in Part 8.G.5 and Part 2.1.2, the inspection requirements in Part 8.G.7 and Part 3, and the monitoring requirements in Part 8.G.8 and Part 4.

Authorized discharges from areas where earth-disturbing activities have ceased and stabilization as specified in Part 8.G.4.1.9 or 8.G.4.2.11, where appropriate, has been completed (stabilization is not required for areas where active mining activities will occur), are no longer subject to the Part 8.G.4 requirements. At such time, authorized discharges become subject to all other applicable requirements in the MSGP, including the effluent limits in Parts 2.1.2 and 8.G.5, the inspection requirements in Parts 3 and 8.G.7, and the monitoring requirements in Parts 4 and 8.G.8.

Erosion and sediment control installation requirements.

• By the time construction activities commence, install and make operational downgradient sediment controls, unless this timeframe is infeasible. If infeasible you must install and make such controls operational as soon as practicable or as soon as site conditions permit.

• All other stormwater controls described in the SWPPP must be installed and made operational as soon as conditions on each portion of the site allows.

Erosion and sediment control maintenance requirements. You must:

• Ensure that all erosion and sediment controls remain in effective operating condition.

• Wherever you determine that a stormwater control needs maintenance to continue operating effectively, initiate efforts to fix the problem immediately after its discovery, and complete such work by the end of the next work day.

• When a stormwater control must be replaced or significantly repaired, complete the work within 7 days, unless infeasible. If 7 days is infeasible, you must complete the installation or repair as soon as practicable.

Perimeter controls. You must:

• Install sediment controls along those perimeter areas of your disturbed area that will receive stormwater, except where site conditions prevent the use of such controls (in which case, maximize their installation to the extent practicable).

• Remove sediment before it accumulates to one-half of the above-ground height of any perimeter control.

Sediment track-out. For construction vehicles and equipment exiting the site directly onto paved roads, you must:

• Use appropriate stabilization techniques to minimize sediment track-out from vehicles and equipment prior to exit;

• Use additional controls to remove sediment from vehicle and equipment tires prior to exit, where necessary;

• Remove sediment that is tracked out onto paved roads by end of the work day.

Note: EPA recognizes that some fine grains may remain visible on the surfaces of off-site streets, other paved areas, and sidewalks even after you have implemented sediment removal practices. Such “staining” is not a violation of Part 8.G.4.1.4.

Soil or sediment stockpiles. You must:

• Minimize erosion of stockpiles from stormwater and wind via temporary cover, if feasible.

• Prevent up-slope stormwater flows from causing erosion of stockpiles (e.g., by diverting flows around the stockpile).

• Minimize sediment from stormwater that runs off of stockpiles, using sediment controls (e.g., a sediment barrier or downslope sediment control).

Sediment basins. If you intend to install a sediment basin to treat stormwater from your earth-disturbing activities, you must:

• Provide storage for either (1) the 2-year, 24-hour storm, or (2) 3,600 cubic feet per acre drained.

• Prevent erosion of (1) basin embankments using stabilization controls (e.g., erosion control blankets), and (2) the inlet and outlet points of the basin using erosion controls and velocity dissipation devices.

Minimize dust. You must minimize the generation of dust through the appropriate application of water or other dust suppression techniques that minimize pollutants being discharged into surface waters.

Restrictions on use of treatment chemicals. If you intend to use sediment treatment chemicals at your site, you are subject to the following minimum requirements:

• Use conventional erosion and sediment controls prior to and after application of chemicals;

• Select chemicals suited to soil type, and expected turbidity, pH, flow rate;

• Minimize the discharge risk from stored chemicals;

• Comply with state/local requirements;

• Use chemicals in accordance with good engineering practices and specifications of chemical supplier;

• Ensure proper training;

• Provide proper SWPPP documentation.

If you plan to use cationic treatment chemicals (as defined in Appendix A), you are ineligible for coverage under this permit, unless you notify your applicable EPA Regional Office in advance and the EPA Regional Office authorizes coverage under this permit after you have included appropriate controls and implementation procedures designed to ensure that your use of cationic treatment chemicals will not lead to a violation of water quality standards.

Site stabilization requirements for earth-disturbing activities performed for purposes of mine site preparation as defined in 8.G.3.2(a) (i.e., not applicable to construction of staging areas for structures and access roads as defined in 8.G.3.2(b)). You must comply with the following stabilization requirements except where the intended function of the site accounts for such disturbed earth (e.g., the earth disturbances will become actively mined, or the controls implemented at the active mining area effectively control the disturbance) (although you are encouraged to do so within the active mining area, where appropriate):

• Temporary stabilization of disturbed areas. Stabilization measures must be initiated immediately in portions of the site where earth-disturbing activities performed for purposes of mine site preparation (as defined in 8.G.3.2(a)) have temporarily ceased, but in no case more than 14 days after such activities have temporarily ceased. In arid, semi-arid, and drought-stricken areas, or in areas subject to snow or freezing conditions, where initiating perennial vegetative stabilization measures is not possible within 14 days after earth-disturbing activities performed for purposes of mine site preparation has temporarily ceased, temporary vegetative stabilization measures must be initiated as soon as practicable. Until temporary vegetative stabilization is achieved, interim measures such as erosion control blankets with an appropriate seed base and tackifiers must be employed. In areas of the site where earth-disturbing activities performed for purposes of mine site preparation have permanently ceased prior to active mining, temporary stabilization measures must be implemented to minimize mobilization of sediment or other pollutants until active mining activities commence.

• Final stabilization of disturbed areas. Stabilization measures must be initiated immediately where earth-disturbing activities performed for purposes of mine site preparation (as defined in 8.G.3.2(a)) have permanently ceased, but in no case more than 14 days after the earth- disturbing activities have permanently ceased. In arid, semi-arid, and drought-stricken areas, or in areas subject to snow or freezing conditions, where initiating perennial vegetative stabilization measures is not possible within 14 days after earth-disturbing activities have permanently ceased, final vegetative stabilization measures must be initiated as soon as possible. Until final stabilization is achieved, temporary stabilization measures, such as erosion control blankets with an appropriate seed base and tackifiers, must be used.

Area of disturbance. You must minimize the amount of soil exposed during construction activities.

Erosion and sediment control design requirements. You must:

• Design, install and maintain effective erosion and sediment controls to minimize the discharge of pollutants from construction activities.

Account for the following factors in designing your erosion and sediment controls:

o The expected amount, frequency, intensity and duration of precipitation;

o The nature of stormwater discharges and run-on at the site, including factors such as impervious surfaces, slopes and site drainage features;

o The range of soil particle sizes expected to be present on the site.

• Direct discharges from your stormwater controls to vegetated areas of your site to increase sediment removal and maximize stormwater infiltration, including any natural buffers, unless infeasible. Use velocity dissipation devices if necessary to prevent erosion when directing stormwater to vegetated areas.

• If any stormwater flow becomes or will be channelized at your site, you must design erosion and sediment controls to control both peak flowrates and total stormwater volume to minimize channel and streambank erosion and scour in the immediate vicinity of discharge points.

• If you install stormwater conveyance channels, they must be designed to avoid unstabilized areas on the site and to reduce erosion, unless infeasible. In addition, you must minimize erosion of channels and their embankments, outlets, adjacent streambanks, slopes, and downstream waters during discharge conditions through the use of erosion controls and velocity dissipation devices within and along the length of any constructed stormwater conveyance channel, and at any outlet to provide a non-erosive flow velocity.

Natural Buffers. For any stormwater discharges from construction activities within 50 feet of a water of the U.S., you must comply with one of the following compliance alternatives:

1. Provide a 50-foot undisturbed natural buffer between construction activities and the water of the U.S.; or

2. Provide an undisturbed natural buffer that is less than 50 feet supplemented by additional erosion and sediment controls, which in combination, achieve a sediment load reduction that is equivalent to a 50-foot undisturbed natural buffer; or

3. If it is infeasible to provide an undisturbed natural buffer of any size, implement erosion and sediment controls that achieve a sediment load reduction that is equivalent to a 50-foot undisturbed natural buffer.

There are exceptions when buffer requirements do not apply:

• There is no stormwater discharge from construction disturbances to a water of the U.S;

• The natural buffer has already been eliminated by preexisting development disturbances;

• The disturbance is for the construction of a water-dependent structure or construction approved under a CWA section 404 permit;

• For linear construction projects, you are not required to comply with the requirements if there are site constraints provided that, to the extent feasible, you limit disturbances within 50 feet of a water of the U.S. and/or you provide supplemental erosion and sediment controls to treat stormwater discharges from any disturbances within 50 feet of a water of the U.S.

See EPA’s industrial stormwater website under “Fact Sheets and Guidance” for information on complying with these alternatives:

https://www.epa.gov/npdes/stormwater-discharges-industrial-activities.

Soil or sediment stockpiles. In addition to the requirements in Part 8.G.4.1.5, you must locate any piles outside of any natural buffers established under Part 8.G.4.2.3.

Sediment basins. In addition to the requirements in Part 8.G.4.1.6, you must locate sediment basins outside of any surface waters and any natural buffers established under Part 8.G.4.2.3, and you must utilize outlet structures that withdraw water from the surface, unless infeasible.

Native topsoil preservation. You must preserve native topsoil removed during clearing, grading, or excavation, unless infeasible. Store topsoil in a manner that will maximize its use in reclamation or final vegetative stabilization (e.g., by keeping the topsoil stabilized with seed or similar measures). This requirement does not apply if the intended function of the disturbed area dictates that topsoil be disturbed or removed.

Steep slopes. You must minimize the disturbance of steep slopes. The permit does not prevent or prohibit disturbance on steep slopes.

Depending on site conditions and needs, disturbance on steep slopes may be necessary (e.g., a road cut in mountainous terrain; for grading https://www.epa.gov/npdes/stormwater-discharges-industrial-activities steep slopes prior to erecting the mine office). Where steep slope disturbances are necessary, you can minimize the disturbances to steep slopes through the implementation of a number of standard erosion and sediment control practices, such as by phasing disturbances in these areas and using stabilization practices specifically for steep grades.

Soil compaction. Where final vegetative stabilization will occur or where infiltration practices will be installed, you must either restrict vehicle/ equipment use in these areas to avoid soil compaction or use soil conditioning techniques to support vegetative growth. Minimizing soil compaction is not required where compacted soil is integral to the functionality of the site.

Dewatering Practices. You are prohibited from discharging ground water or accumulated stormwater that is removed from excavations, trenches, foundations, vaults or other similar points of accumulation, unless such waters are first effectively managed by appropriate controls (e.g., sediment basins or sediment traps, sediment socks, dewatering tanks, tube settlers, weir tanks, or filtration systems). Uncontaminated, non-turbid dewatering water can be discharged without being routed to a control.

(An uncontaminated discharge is a discharge that meets applicable water quality standards.)

You must also meet the following requirements for dewatering activities:

• Discharge requirements:

o No discharging visible floating solids or foam;

o Remove oil, grease and other pollutants from dewatering water via an oil-water separator or suitable filtration device (such as a cartridge filter);

o Utilize vegetated upland areas of the site, to the extent feasible, to infiltrate dewatering water before discharge. In no case shall waters of the U.S. be considered part of the treatment area;

o Implement velocity dissipation devices at all points where dewatering water is discharged;

o Haul backwash water away for disposal or return it to the beginning of the treatment process; and o Clean or replace the filter media used in dewatering devices when the pressure differential equals or exceeds the manufacturer’s specifications.

• Treatment chemical restrictions: If you use polymers, flocculants or other chemicals to treat dewatering water, you must comply with the requirements in Parts 8.G.4.1.8.

Pollution prevention requirements.

• Prohibited discharges (this non-exhaustive list of prohibited non-stormwater discharges is included here as a reminder that only the only authorized non-stormwater discharges are those enumerated in Part 1.2.2):

o Wastewater from washout of concrete;

o Wastewater from washout and cleanout of…