Proposed 2013 MSGP

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 Limitation on Coverage

8.A.2.1 Prohibition of Discharges. (See also Part 1.1.4) Not covered by this permit: stormwater 

discharges from areas where there may be contact with the chemical formulations 

sprayed to provide surface protection. These discharges must be covered by a 

separate NPDES permit.

8.A.2.2 Authorized Non-Stormwater Discharges. (See also Part 1.1.3) Also authorized by this 

permit, provided the non-stormwater component of the discharge is in compliance 

with the requirements in Part 2.1.2 (Non-Numeric Effluent Limits): discharges from the 

spray down of lumber and wood product storage yards where no chemical additives 

are used in the spray-down waters and no chemicals are applied to the wood during 

storage.

8.A.3 Additional Technology-Based Effluent Limits.

8.A.3.1 Good Housekeeping. (See also Part 2.1.2.2) In areas where storage, loading and 

unloading, and material handling occur, perform good housekeeping to limit the 

discharge of wood debris, minimize the leachate generated from decaying wood 

materials, and minimize the generation of dust.

8.A.4 Additional SWPPP Requirements.

8.A.4.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP where any of 

the following may be exposed to precipitation or surface runoff: processing areas, 

treatment chemical storage areas, treated wood and residue storage areas, wet 

decking areas, dry decking areas, untreated wood and residue storage areas, and 

treatment equipment storage areas.

8.A.4.2 Inventory of Exposed Materials. (See also Part 5.2.3.2) Where such information exists, if 

your facility has used chlorophenolic, creosote, or chromium-copper-arsenic 

formulations for wood surface protection or preserving, document in your SWPPP the 

following: areas where contaminated soils, treatment equipment, and stored materials 

still remain and the management practices employed to minimize the contact of these 

materials with stormwater runoff.

8.A.4.3 Description of Stormwater Management Controls. (See also Part 5.2.4) Document 

measures implemented to address the following activities and sources: log, lumber, 

and wood product storage areas; residue storage areas; loading and unloading areas; 

material handling areas; chemical storage areas; and equipment and vehicle 

maintenance, storage, and repair areas. If your facility performs wood surface 

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protection and preservation activities, address the specific control measures, including 

any BMPs, for these activities.

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 Sector-Specific Benchmarks

Table 8.A-1 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-1 

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 Zinc

(freshwater)2 

Total Zinc 

(saltwater)1

Hardness Dependent

0.09 mg/L 

Subsector A2. Wood Preserving (SIC 2491) Total Arsenic 0.15 mg/L

Total Copper

(freshwater)2 

Total Copper 

(saltwater)1 

Hardness Dependent

0.0048 mg/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

1Saltwater 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 6.2.1.1, to identify the applicable ‘hardness 

range’ for determining their benchmark value applicable to their facility. Hardness Dependent Benchmarks follow in the 

table below:

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Freshwater Hardness 

Range

Copper

(mg/L)

Zinc

(mg/L)

0-24.99 mg/L 0.0038 0.04

25-49.99 mg/L 0.0056 0.05

50-74.99 mg/L 0.0090 0.08

75-99.99 mg/L 0.0123 0.11

100-124.99 mg/L 0.0156 0.13

125-149.99 mg/L 0.0189 0.16

150-174.99 mg/L 0.0221 0.18

175-199.99 mg/L 0.0253 0.20

200-224.99 mg/L 0.0285 0.23

225-249.99 mg/L 0.0316 0.25

250+ mg/L 0.0332 0.26

8.A.7 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1 of the 

permit.)

Table 8.A-2 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-21

Industrial Activity

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 opening

1 Monitor annually.

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Proposed 2013 MSGP

Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart B – 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 Sector-Specific Benchmarks.

Table 8.B-1 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 

activities.

Table 8.B-1.

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

Page 49 of 146
Proposed 2013 MSGP

Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart C – 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.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) The following are not 

covered by this permit: non-stormwater discharges containing inks, paints, or 

substances (hazardous, nonhazardous, etc.) resulting from an onsite spill, including 

materials collected in drip pans; washwater from material handling and processing 

areas; and washwater from drum, tank, or container rinsing and cleaning.

8.C.3 Sector-Specific Benchmarks

Table 8.C-1 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. 

Page 50 of 146
Proposed 2013 MSGP

Table 8.C-1. 

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 Lead (freshwater)2 

Total Lead (saltwater)1

Hardness Dependent

0.21 mg/L

Total Iron 1.0 mg/L

Total Zinc (freshwater)2 

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L

Phosphorus 2.0 mg/L

Subsector C2. Industrial Inorganic Chemicals 

(SIC 2812-2819) 

Total Aluminum 0.75 mg/ L

Total Iron 1.0 mg/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 Zinc (freshwater)2 

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L

Subsector C4. Plastics, Synthetics, and Resins 

(SIC 2821-2824)

Total Zinc (freshwater)2

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L 1Saltwater benchmark values apply to stormwater discharges into saline waters where indicated.

2The 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 6.2.1.1, 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

(mg/L)

Zinc

(mg/L)

0-24.99 mg/L 0.014 0.04

25-49.99 mg/L 0.023 0.05

50-74.99 mg/L 0.045 0.08

75-99.99 mg/L 0.069 0.11

100-124.99 mg/L 0.095 0.13

125-149.99 mg/L 0.122 0.16

150-174.99 mg/L 0.151 0.18

175-199.99 mg/L 0.182 0.20

200-224.99 mg/L 0.213 0.23

225-249.99 mg/L 0.246 0.25

250+ mg/L 0.262 0.26

8.C.4 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1 of the 

permit.)

Table 8.C-2 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 wastestreams that may be 

covered under this permit.

Page 51 of 146
 

 

 

 

 

Proposed 2013 MSGP 

Table 8.C-21 

Industrial Activity Parameter Effluent Limit 

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. 

Page 52 of 146 
Proposed 2013 MSGP

Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart D – 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 1.1.4): 

8.D.2.1 Discharges from petroleum refining facilities, including those that manufacture asphalt 

or asphalt products, that are subject to nationally established effluent limitation 

guidelines found in 40 CFR Part 419 (Petroleum Refining); or

8.D.2.2 Discharges from oil recycling facilities; or

8.D.2.3 Discharges associated with fats and oils rendering.

8.D.3 Sector-Specific Benchmarks

Table 8.D-1 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-1. 

Subsector Parameter Benchmark Monitoring 

Concentration

Subsector D1. Asphalt Paving and Roofing 

Materials (SIC 2951, 2952) 

Total Suspended Solids 

(TSS)

100 mg/L

8.D.4 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1 of the 

permit.)

Table 8.D-2 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 wastestreams that may be 

covered under this permit.

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Proposed 2013 MSGP

Table 8.D-21

Industrial Activity Parameter Effluent Limit

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.

Page 54 of 146
Proposed 2013 MSGP

Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart E – 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.2.1 Good Housekeeping Measures. (See also Part 2.1.2.2) With good housekeeping, 

prevent or minimize the discharge of spilled cement, aggregate (including sand or 

gravel), kiln dust, fly ash, settled dust, or other significant material in stormwater from 

paved portions of the site that are exposed to stormwater. Sweep or vacuum at regular

intervals or use other equivalent measures to minimize the presence of these materials. 

Indicate in your SWPPP the frequency of sweeping, vacuuming or other equivalent 

measures. Determine the frequency based on the amount of industrial activity 

occurring in the area and the frequency of precipitation, but it must be performed at 

least once a week if cement, aggregate, kiln dust, fly ash, or settled dust are being 

handled or processed. You must also prevent the exposure of fine granular solids 

(cement, fly ash, kiln dust, etc.) to stormwater, where practicable, by storing these 

materials in enclosed silos, hoppers, or buildings, or under other covering.

8.E.3 Additional SWPPP Requirements.

8.E.3.1 Drainage Area Site Map. (See also Part 5.2.2) Document in the SWPPP the locations of 

the following, as applicable: bag house or other dust control device; 

recycle/sedimentation pond, clarifier, or other device used for the treatment of process 

wastewater; and the areas that drain to the treatment device.

8.E.3.2 Discharge Testing. (See also Part 5.2.3.4) For facilities producing ready-mix concrete, 

concrete block, brick, or similar products, include in the non-stormwater discharge 

testing a description of measures that ensure that process wastewaters resulting from 

washing trucks, mixers, transport buckets, forms, or other equipment are discharged in 

accordance with NPDES requirements or are recycled.

8.E.4 Sector-Specific Benchmarks.

Table 8.E-1 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.

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Table 8.E-1. 

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 Aluminum 0.75 mg/L

Subsector E2. Concrete and Gypsum 

Product Manufacturers (SIC 3271-3275) 

Total Suspended Solids 

(TSS)

100 mg/L

Total Iron 1.0 mg/L

8.E.5 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1 of the 

permit.)

Table 8.E-2 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 wastestreams that may be covered under 

this permit.

Table 8.E-21

Industrial Activity Parameter Effluent Limit

Discharges from material storage piles at 

cement manufacturing facilities

Total Suspended Solids

(TSS)

50 mg/L, daily 

maximum

pH 6.0 - 9.0 s.u.

1Monitor annually.

Page 56 of 146
Proposed 2013 MSGP

Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart F – 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

8.F.2.1 Good Housekeeping Measures. (See also Part 2.1.2.2) As part of your good 

housekeeping program, include a cleaning and maintenance program for all 

impervious areas of the facility where particulate matter, dust, or debris may 

accumulate, especially areas where material loading and unloading, storage, 

handling, and processing occur; and, where practicable, the paving of areas where 

vehicle traffic or material storage occur but where vegetative or other stabilization 

methods are not practicable (institute a sweeping or vacuuming program in these 

areas too). For unstabilized areas where sweeping or vacuuming is not practicable, use 

stormwater management devices such as sediment traps, vegetative buffer strips, filter 

fabric fence, sediment filtering boom, gravel outlet protection, or other equivalent 

measures that effectively trap or remove sediment.

8.F.3 Additional SWPPP Requirements.

8.F.3.1 Drainage Area Site Map. (See also Part 5.2.2) Identify in the SWPPP where any of the 

following activities may be exposed to precipitation or surface runoff: storage or 

disposal of wastes such as spent solvents and baths, sand, slag and dross; liquid storage 

tanks and drums; processing areas including pollution control equipment (e.g., 

baghouses); and storage areas of raw material such as coal, coke, scrap, sand, fluxes, 

refractories, or metal in any form. In addition, indicate where an accumulation of 

significant amounts of particulate matter could occur from such sources as furnace or 

oven emissions, losses from coal and coke handling operations, etc., and could result in 

a discharge of pollutants to waters of the United States.

8.F.3.2 Inventory of Exposed Material. (See also Part 5.2.3) Include in the inventory of materials 

handled at the site that potentially may be exposed to precipitation or runoff, areas 

where deposition of particulate matter from process air emissions or losses during 

material-handling activities are possible

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, and cyclones), for any signs of degradation (e.g., 

leaks, corrosion, or 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 

Page 57 of 146
Proposed 2013 MSGP

(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 runoff.

8.F.5 Sector-Specific Benchmarks.

Table 8.F-1 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-1.

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 Aluminum 0.75 mg/L

Total Zinc (freshwater)2 

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L

Subsector F2. Iron and Steel Foundries 

(SIC 3321-3325) 

Total Aluminum 0.75 mg/L

Total Suspended Solids (TSS) 100 mg/L

Total Copper (freshwater)2 

Total Copper (saltwater)1

Hardness Dependent

0.0048 mg/L

Total Iron 1.0 mg/L

Total Zinc (freshwater)2 

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L

Subsector F3. Rolling, Drawing, and 

Extruding of Nonferrous Metals 

(SIC 3351-3357) 

Total Copper (freshwater)2

Total Copper (saltwater)1

Hardness Dependent

0.0048 mg/L

Total Zinc (freshwater)2 

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L

Subsector F4. Nonferrous Foundries 

(SIC 3363-3369) 

Total Copper (freshwater)2 

Total Copper (saltwater)1

Hardness Dependent

0.0048 mg/L

Total Zinc (freshwater)2 

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L 1Saltwater 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 6.2.1.1, 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

Copper

(mg/L)

Zinc

(mg/L)

0-24.99 mg/L 0.0038 0.04

25-49.99 mg/L 0.0056 0.05

50-74.99 mg/L 0.0090 0.08

75-99.99 mg/L 0.0123 0.11

100-124.99 mg/L 0.0156 0.13

125-149.99 mg/L 0.0189 0.16

150-174.99 mg/L 0.0221 0.18

175-199.99 mg/L 0.0253 0.20

200-224.99 mg/L 0.0285 0.23

225-249.99 mg/L 0.0316 0.25

250+ mg/L 0.0332 0.26

Page 58 of 146
Proposed 2013 MSGP

Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart G – 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.

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.

8.G.1.1 Covered Discharges from Inactive Facilities. All stormwater discharges.

8.G.1.2 Covered Discharges from Active and Temporarily Inactive Facilities. Only the 

stormwater discharges from the following areas are covered: 

• Waste rock and overburden piles if composed entirely of stormwater and not 

combining 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;

• Runoff from tailings dams or dikes when not constructed of waste rock or tailings 

and no process fluids are present; 

• Runoff 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; 

Page 59 of 146
Proposed 2013 MSGP

• Partially or inadequately reclaimed areas or areas not released from 

reclamation requirements.

8.G.1.3 Covered Discharges from Exploration and Construction of Metal Mining and/or Ore

Dressing Facilities. All stormwater discharges.

8.G.1.4 Covered Discharges from Facilities Undergoing Reclamation. All stormwater discharges.

8.G.2 Limitations on Coverage.

8.G.2.1 Prohibition of Stormwater Discharges. Stormwater discharges not authorized by this 

permit: discharges from active metal mining facilities that are subject to effluent 

limitation guidelines for the Ore Mining and Dressing Point Source Category (40 CFR Part 

440). 

NOTE: Stormwater runoff 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: (1) 

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 

1.2 of the permit. Permit applicants 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 permit applicants 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.2.2 Prohibition of Non-Stormwater Discharges. Not authorized by this permit: adit drainage, 

and contaminated springs or seeps discharging from waste rock dumps that do not 

directly result from precipitation events (see also the standard Limitations on Coverage 

in Part 1.1.4).

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).

8.G.3.1 Mining operation - Consists of the active and temporarily inactive phases, and the 

reclamation phase, but excludes the exploration and construction phases.

8.G.3.2 Exploration phase - Entails exploration and land disturbance activities to determine the 

viability of a site. The exploration phase is not considered part of “mining operations.”

8.G.3.3 Construction phase - Includes the building of site access roads and removal of 

overburden and waste rock to expose mineable minerals. The construction phase is 

not considered part of “mining operations.”

8.G.3.4 Active phase - Activities including the extraction, removal or recovery of metal ore. For 

surface mines, this definition does not include any land where grading has returned the 

earth to a desired contour and reclamation has begun. This definition is derived from 

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the definition of “active mining area” found at 40 CFR 440.132(a). The active phase is 

considered part of “mining operations.”

8.G.3.5 Reclamation phase - Activities undertaken, in compliance with applicable mined land 

reclamation requirements, following the cessation of the “active phase”, intended to 

return the land to an appropriate post-mining land use in order to meet applicable 

Federal and State reclamation requirements. The reclamation phase is considered part 

of "mining operations."

8.G.3.6 Active metal mining facility - A place where work or other activity related to the 

extraction, removal, or recovery of metal ore is being conducted. For surface mines, 

this definition does not include any land where grading has returned the earth to a 

desired contour and reclamation has begun. This definition is derived from the 

definition of “active mining area” found at 40 CFR 440.132(a).

8.G.3.7 Inactive metal mining facility - A site or portion of a site where metal mining and/or 

milling occurred in the past but is not an active facility as defined above, and where 

the inactive portion is not covered by an active mining permit issued by the applicable 

State or Federal agency. An inactive metal mining facility has an identifiable owner / 

operator. Sites where mining claims are being maintained prior to disturbances 

associated with the extraction, beneficiation, or processing of mined materials and sites 

where minimal activities are undertaken for the sole purpose of maintaining a mining 

claim are not considered either active or inactive mining facilities and do not require 

an NPDES industrial stormwater permit.

8.G.3.8 Temporarily inactive metal mining facility - A site or portion of a site where metal mining 

and/or milling occurred in the past but currently are not being actively undertaken, 

and the facility is covered by an active mining permit issued by the applicable State or 

Federal agency.

8.G.3.9 Final Stabilization - A site or portion of a site is “finally stabilized” when it has 

implemented all applicable Federal and State reclamation requirements.

8.G.4 Technology-Based Effluent Limits for Clearing, Grading, and Excavation Activities.

Clearing, grading, and excavation activities being conducted as part of the exploration 

and construction phase of mining activities are covered under this permit. During clearing, 

grading, and excavation activities you must comply with all applicable effluent limits in Part 2 of 

this permit, and you must also comply with the following effluent limits which are from the 2012 

version of EPA’s Construction General Permit (CGP). Contained in Part 8.G.4 are the basic 

requirements of EPA’s CGP, however, you should consult EPA’s CGP to ensure full compliance is 

achieved.

8.G.4.1 Requirements Regarding Erosion And Sediment Control. . 

8.G.4.1.1 Installation of Stormwater Controls (See Part 2.1.1.3 of EPA’s CGP)

• By the time construction commences, stormwater controls to treat 

initial disturbance must be installed and made operational. 

• Controls must be installed along perimeter areas of site that will 

receive stormwater flow. 

• Remaining controls must be installed as soon as conditions allow

8.G.4.1.2 Maintenance of Stormwater Controls (See Part 2.1.1.4 of EPA’s CGP) 

• At any time, if a stormwater control needs repair or replacement 

to continue operating effectively;

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o Initiate work to fix the problem immediately

o Complete work by end of the next work day

• If a stormwater control must be replaced or significantly repaired, 

work must be completed within 7 days, unless infeasible

8.G.4.1.3 Natural Buffers (See Part 2.1.2.1 and Appendix G of EPA’s CGP). If earth 

disturbances will occur within 50 feet of a water of the U.S., additional 

protections apply. You must comply with 1 of 3 compliance alternatives:

1. Provide a 50-foot undisturbed natural buffer between construction 

disturbances 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 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 buffer. 

There are exceptions when buffer requirements don’t apply:

1. There is no stormwater discharge from construction disturbances to 

the water of the U.S.; 

2. The natural buffer has already been eliminated by preexisting 

development disturbances; or

3. The disturbance is for the construction of a water-dependent 

structure (pier, boat ramp) or construction approved under a CWA 

section 404 permit. 

8.G.4.1.4 Sediment Discharge Controls (See Parts 2.1.2.2 – 2.1.3.3 of EPA’s CGP) 

Perimeter controls:

• Install sediment controls along those perimeter areas of your site that 

will receive stormwater; and

• Remove sediment before it has accumulated to one-half of the 

above-ground height of any perimeter control.

Sediment track-out:

• Restrict vehicle use to designated exit points; 

• Use appropriate stabilization techniques; and

• Remove tracked-out sediment by end of the work day. 

Soil or sediment stockpiles:

• Locate the piles outside of any natural buffers established under Part

8.G.4.1.3; 

• Protect from contact with stormwater runoff using temporary barriers; 

and

• Provide cover or appropriate temporary stabilization, where 

practicable. 

Storm drain inlets:

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• Install inlet protection measures (at sewer inlets that you can access) 

that remove sediment prior to discharge into storm drain

• Can be removed in the event of flood conditions or to prevent 

erosion; and

• Clean, or remove and replace, the protection measures as sediment 

accumulates, the filter becomes clogged, and/or performance is 

compromised

Sediment basins

• Provide storage for either (1) the 2-year, 24-hour storm, or (2) 3,600 

cubic feet per acre drained; and

• Utilize outlet structures that withdraw water from surface, unless 

infeasible. 

• Prevent erosion of (1) the sediment basin using stabilization controls

(e.g., erosion control blankets), and (2) the inlet and outlet using

erosion controls and velocity dissipation devices; and

• Locate sediment basins outside any natural buffers established under 

Part 8.G.4.1.3.

Other related requirements: 

• Minimize amount of soil exposed at any one time during construction

• Minimize steep slope disturbances

• Minimize soil compaction

• Direct stormwater to the site’s vegetated areas unless infeasible

8.G.4.1.5 Restrictions on Use of Treatment Chemicals (See Part 2.1.3.3 of EPA’s CGP). 

If you will use treatment chemicals at your site, you are subject to the 

following minimum requirements:

• Use conventional E&S controls prior to and after application of 

chemical; 

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

rate; 

• Minimize discharge risk from stored chemicals; 

• Apply in accordance with state/local requirements, good engineering 

practices, and dosage recommendations of chemical supplier; and

• Ensure proper training. 

The use of cationic treatment chemicals is not allowed under the MSGP 

unless EPA specifically authorizes its use:

• You will need to contact the applicable EPA Regional Office if you 

intend to use cationic treatment chemicals at your site to determine 

what information EPA requires to evaluate your request; and

• Use of cationic chemicals will likely be subject to additional 

requirements to ensure protection of water quality standards. 

8.G.4.1.6 Site Stabilization (See Part 2.2 of EPA’s CGP) 

When to initiate stabilization:

• By no later than the end of the next work day after construction work 

in an area has stopped permanently or temporarily

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When stabilization must be completed:

• If using vegetative measures, by no later than 14 days after initiating 

stabilization, the operator must:

o Seed or plant the area, and provide temporary cover to 

protect planted area; and

o Once established, vegetation must cover at least 70% of 

stabilized area based on density of native vegetation. 

• If using non-vegetative stabilization, by no later than 14 days after 

initiating stabilization, the operator must:

o Install or apply all non-vegetative measures; and

o Cover all areas of exposed soil. 

Exceptions:

• Arid, semi-arid (if construction occurs during seasonally dry period), or 

drought-stricken areas:

o Within 14 days of stopping construction work in an area, install 

any necessary non-vegetative stabilization measures; 

o Initiate vegetative stabilization as soon conditions on the site 

allow; 

o Document the schedule that will be followed for initiating and 

completing vegetative stabilization; and

o Area must be planted so that within 3 years 70% cover 

requirement is met. 

• Sites affected by severe storm events or other unforeseen 

circumstances: 

o Initiate vegetative stabilization as soon conditions on the site 

allow; 

o Document the schedule that will be followed for initiating and 

completing vegetative stabilization; and

o Area must be planted so that within 3 years 70% cover 

requirement is met. 

8.G.4.2 Pollution Prevention Requirements (See Part 2.3 of EPA’s CGP) 

8.G.4.2.1 Prohibited Non-Stormwater Discharges: 

• Wastewater from washout of concrete, unless managed by an 

appropriate control; 

• Wastewater from washout and cleanout of stucco, paint, form release 

oils, curing compounds, and other construction materials, unless 

managed by an appropriate control; 

• Fuels, oils, or other pollutants used for O&M of vehicles or equipment; 

• Soaps or solvents used in vehicle or equipment washing; and

• Toxic or hazardous substances from a spill or other release

8.G.4.2.2 Design and Location Requirements: 

• Use effective means of preventing discharge from pollution sources: 

o Minimize exposure; or

o Use secondary containment or equivalent measures; or

o Provide spill kits. 

• Use leak-proof containers for all chemicals: 

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o Locate away from surface waters, storm sewer inlets, and 

drainageways; and

o Clean up spills immediately – do not clean by hosing area 

down

8.G.4.3 Water-Quality Requirements

Stricter requirements apply if your site will discharge to an impaired water or a water 

that is identified by your state, tribe, or EPA as a Tier 2 or Tier 2.5 for antidegradation 

purposes: 

• More rapid stabilization of exposed areas: 

o Complete initial stabilization activities within 7 days of stopping 

construction work.

• More frequent site inspections: 

o Once every 7 days and within 24 hours of a storm event of 0.25 inches

or greater. 

8.G.4.4 Inspection Requirements (See Part 4.1 of EPA’s CGP) 

8.G.4.4.1 Inspection Frequency

• At least once every 7 calendar days, or

• Once every 14 calendar days and within 24 hours of a storm event of 0.25 

inches or greater. Note:

o Inspections only required during working hours; 

o Inspections not required during unsafe conditions; and 

o If you choose to inspect once every 14 days, you must have a method 

for measuring rainfall amount on site (either rain gauge or 

representative weather station)

8.G.4.4.2 Reductions in Inspection Frequency

• Stabilized areas: You may reduce the frequency of inspections to once

per month in any area of your site where the stabilization as occurred 

pursuant to Part 8.G.4.1.6. 

• Arid, semi-arid, and drought stricken areas: if construction is occurring during 

the seasonally dry period or during a period in which drought is predicted to 

occur, you may reduce inspections to once per month and within 24 hours of 

a 0.25 inch storm event. 

• Frozen conditions: You may temporarily suspend or reduce inspections (to 

once per month) until thawing conditions occur if frozen conditions are 

continuous and disturbed areas have been stabilized. 

8.G.4.4.3 Areas to be Inspected: 

You must at a minimum inspect the following areas:

• All disturbed areas; 

• All stormwater controls and pollution prevention measures; 

• All locations where stabilization measures have been implemented; 

• Material, waste, borrow, or equipment storage and maintenance areas; 

• All areas where stormwater flows; and

• All points of discharge. 

8.G.4.4.4 What to Check for During Inspections

At a minimum you must check:

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• Whether all stormwater controls are installed, operational, and working as 

intended; 

• If any new or modified stormwater controls are needed; 

• Conditions that could lead to a spill or leak; and

• Visual signs of erosion/sedimentation at points of discharge. 

If a discharge is occurring:

• The quality and characteristics of the discharge; and

• Whether controls are operating effectively

8.G.4.4.5 Inspection Report

Within 24 hours of an inspection, complete a report that includes:

• Inspection date; 

• Name and title of inspector(s); 

• Summary of inspection findings ; 

• Rainfall amount that triggered the inspection (if applicable); 

• If it was unsafe to inspect a portion of the site, include documentation of the 

reason and the location(s;) 

• Each inspection report must be signed; and

• Must keep a current copy of all reports at the site or at an easily accessible 

location. 

8.G.5 Additional Technology-Based Effluent Limits.

8.G.5.1 Employee Training. (See also Part 2.1.2.8) Conduct employee training at least annually 

at active and temporarily inactive sites.

8.G.5.2 Stormwater Controls. Apart from the control measures you implement to meet your Part 

2 effluent limits, where necessary to minimize pollutant discharges, implement the 

following control measures at your site. The potential pollutants identified in Part 8.G.6.3 

shall determine the priority and appropriateness of the control measures selected.

8.G.5.2.1 Stormwater Diversions: Divert stormwater away from potential pollutant 

sources where practicable. The following are some options: interceptor or 

diversion controls (e.g., dikes, swales, curbs, or berms); pipe slope drains; 

subsurface drains; conveyance systems (e.g., channels or gutters, open-top 

box culverts, and waterbars; rolling dips and road sloping; roadway surface 

water deflector and culverts); or their equivalents.

8.G.5.2.2 Capping: When capping is necessary to minimize pollutant discharges in 

stormwater, identify the source being capped and the material used to 

construct the cap.

8.G.5.2.3 Treatment: If treatment of stormwater (e.g., chemical or physical systems, oil 

and water separators, artificial wetlands) is necessary to protect water quality, 

describe the type and location of treatment used. Passive and/or active 

treatment of stormwater runoff is encouraged where practicable. Treated 

runoff may be discharged as a stormwater source regulated under this permit 

provided the discharge is not combined with discharges subject to effluent 

limitation guidelines for the Ore Mining and Dressing Point Source Category 

(40 CFR Part 440). 

8.G.5.3 Discharge Testing. (See also Part 5.2.3.4) Test or evaluate all outfalls covered under this 

permit for the presence of specific mining-related non-stormwater discharges such as 

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seeps or adit discharges, or discharges subject to effluent limitations guidelines (e.g., 40 

CFR Part 440), such as mine drainage or process water. Alternatively (if applicable), you 

may keep a certification with your SWPPP consistent with Part 8.G.6.6.

8.G.6 Additional SWPPP Requirements.

8.G.6.1 Nature of Industrial Activities. (See also Part 5.2.2) Briefly document in your SWPPP the 

mining and associated activities that can potentially affect the stormwater discharges 

covered by this permit, including a general description of the location of the site 

relative to major transportation routes and communities. 

8.G.6.2 Site Map. (See also Part 5.2.2) Document in your SWPPP the locations of the following 

(as appropriate): mining or milling site boundaries; access and haul roads; outline of the 

drainage areas of each stormwater outfall within the facility with indications of the 

types of discharges from the drainage areas; location(s) of all permitted discharges 

covered under an individual NPDES permit, outdoor equipment storage, fueling, and 

maintenance areas; materials handling areas; outdoor manufacturing, outdoor 

storage, and material disposal areas; outdoor chemicals and explosives storage areas; 

overburden, materials, soils, or waste storage areas; location of mine drainage (where 

water leaves mine) or other process water; tailings piles and ponds (including proposed 

ones); heap leach pads; off-site points of discharge for mine drainage and process 

water; surface waters; boundary of tributary areas that are subject to effluent 

limitations guidelines; and location(s) of reclaimed areas.

8.G.6.3 Potential Pollutant Sources. (See also Part 5.2.3) For each area of the mine or mill site 

where stormwater discharges associated with industrial activities occur, identify the 

types of pollutants (e.g., heavy metals, sediment) likely to be present in significant 

amounts. Consider these factors: the mineralogy of the ore and waste rock (e.g., acid 

forming); toxicity and quantity of chemicals used, produced, or discharged; the 

likelihood of contact with stormwater; vegetation of site (if any); and history of 

significant leaks or spills of toxic or hazardous pollutants. Also include a summary of any 

existing ore or waste rock or overburden characterization data and test results for 

potential generation of acid rock. If any new data is acquired due to changes in ore 

type being mined, update your SWPPP with this information.

8.G.6.4 Documentation of Control Measures. Document all control measures that you 

implement consistent with Part 8.G.5.2. If control measures are implemented or 

planned but are not listed in Part 8.G.5.2 (e.g., substituting a less toxic chemical for a 

more toxic one), include descriptions of them in your SWPPP.

8.G.6.5 Employee Training. All employee training(s) must be documented in the SWPPP.

8.G.6.6 Certification of Permit Coverage for Commingled Non-Stormwater Discharges: If you 

are able, consistent with Part 8.G.5.3 above, to certify that a particular discharge 

composed of commingled stormwater and non-stormwater is covered under a 

separate NPDES permit, and that permit subjects the non-stormwater portion to effluent 

limitations prior to any commingling, retain such certification with your SWPPP. This 

certification must identify the non-stormwater discharges, the applicable NPDES 

permit(s), the effluent limitations placed on the non-stormwater discharge by the 

permit(s), and the points at which the limitations are applied.

8.G.7 Additional Inspection Requirements.

(See also Part 3.1 and 8.G.4.4.) Except for areas of the site subject to clearing, grading, 

and/or excavation activities conducted as part of the exploration and construction phase, 

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which are subject to Part 8.G.4.2.1, inspect sites at least quarterly unless adverse weather 

conditions make the site inaccessible. Sites which discharge to waters designated as Tier 2 or 2.5 

or waters which are impaired for sediment or nitrogen must be inspected monthly, unless subject 

to 8.G.4.3. See Part 8.G.8.4 for inspection requirements for inactive and unstaffed sites.

8.G.8 Monitoring and Reporting Requirements. (See also Part 6 of the permit.)

Note: There are no Part 8.G.8 monitoring and reporting requirements for inactive and 

unstaffed sites.

8.G.8.1 Benchmark Monitoring for Active Copper Ore Mining and Dressing Facilities. Table 8.G-1 

identifies benchmarks that apply to active copper ore mining and dressing facilities. 

These benchmarks apply to both your primary industrial activity and any co-located 

industrial activities. 

Table 8.G-1 

Subsector 

(You may be subject to requirements for 

more than one sector/subsector)

Parameter

Benchmark 

Monitoring 

Concentration

Subsector G1. Active Copper Ore Mining 

and Dressing Facilities

(SIC 1021) 

Total Suspended Solids 

(TSS)

100 mg/L

Nitrate plus Nitrite 

Nitrogen

0.68 mg/L

Chemical Oxygen 

Demand (COD)

120 mg/L

8.G.8.2 Benchmark Monitoring Requirements for Discharges From Waste Rock and Overburden 

Piles at Active Metal Mining Facilities. For discharges from waste rock and overburden 

piles, perform benchmark monitoring once in the first year for the parameters listed in 

Table 8.G-2, and twice annually in all subsequent years of coverage under this permit 

for any parameters for which the benchmark has been exceeded. You are also 

required to conduct analytic monitoring for the parameters listed in Table 8.G-3 in 

accordance with the requirements in Part 8.G.6.3. The Director may also notify you that 

you must perform additional monitoring to accurately characterize the quality and 

quantity of pollutants discharged from your waste rock and overburden piles.

Table 8.G-2. 

Subsector 

(Discharges may be subject to 

requirements for more than one 

sector/subsector)

Parameter Benchmark Monitoring 

Concentration

Subsector G2. Iron Ores; Copper Ores; 

Lead and Zinc Ores; Gold and Silver 

Ores; Ferroalloy Ores, Except 

Vanadium; and Miscellaneous Metal 

Ores (SIC Codes 1011, 1021, 1031, 1041, 

1044, 1061, 1081, 1094, 1099) 

(Note: when analyzing hardness for a 

suite of metals, it is more cost effective 

Total Suspended Solids (TSS) 100 mg/L

Turbidity 50 NTU

pH 6.0-9.0 s.u.

Hardness (as CaCO3; calc. 

from Ca, Mg)2

no benchmark value

Total Antimony 0.64 mg/L

Total Arsenic 0.15 mg/ L

Total Beryllium 0.13 mg/L

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Table 8.G-2. 

Subsector 

(Discharges may be subject to 

requirements for more than one 

sector/subsector)

Parameter Benchmark Monitoring 

Concentration

to add analysis of calcium and 

magnesium, and have hardness 

calculated than to require hardness 

analysis separately)

Total Cadmium (freshwater)2 

Total Cadmium (saltwater)1 

Hardness Dependent

0.04 mg/L

Total Copper (freshwater)2

Total Copper (saltwater)1

Hardness Dependent

0.0048 mg/L

Total Iron 1.0 mg/L

Total Lead (freshwater)2 

Total Lead (saltwater)1

Hardness Dependent

0.21 mg/L

Total Mercury 0.0014 mg/L

Total Nickel (freshwater)2 

Total Nickel (saltwater)1

Hardness Dependent

0.074 mg/L

Total Selenium 0.005 mg/L

Total Silver (freshwater)2 

Total Silver (saltwater)1

Hardness Dependent

0.0019 mg/L

Total Zinc (freshwater)2

Total Zinc (saltwater)1 

Hardness Dependent

0.09 mg/L 1Saltwater 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 6.2.1.1, 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

Cadmium

(mg/L)

Copper

(mg/L)

Lead

(mg/L)

Nickel

(mg/L)

Silver

(mg/L)

Zinc

(mg/L)

0-24.99 mg/L 0.0005 0.0038 0.014 0.15 0.0007 0.04

25-49.99 mg/L 0.0008 0.0056 0.023 0.20 0.0007 0.05

50-74.99 mg/L 0.0013 0.0090 0.045 0.32 0.0017 0.08

75-99.99 mg/L 0.0018 0.0123 0.069 0.42 0.0030 0.11

100-124.99 mg/L 0.0023 0.0156 0.095 0.52 0.0046 0.13

125-149.99 mg/L 0.0029 0.0189 0.122 0.61 0.0065 0.16

150-174.99 mg/L 0.0034 0.0221 0.151 0.71 0.0087 0.18

175-199.99 mg/L 0.0039 0.0253 0.182 0.80 0.0112 0.20

200-224.99 mg/L 0.0045 0.0285 0.213 0.89 0.0138 0.23

225-249.99 mg/L 0.0050 0.0316 0.246 0.98 0.0168 0.25

250+ mg/L 0.0053 0.0332 0.262 1.02 0.0183 0.26

8.G.8.3 Additional Analytic Monitoring Requirements for Discharges From Waste Rock and 

Overburden Piles at Active Metal Mining Facilities. In addition to the monitoring 

required in Part 8.G.8.2 for discharges from waste rock and overburden piles, you must 

also conduct monitoring for additional parameters based on the type of ore you mine 

at your site. Where a parameter in Table 8.G-3 is the same as a pollutant you are 

required to monitor for in Table 8.G-2 (i.e., for all of the metals), you must use the 

corresponding benchmark in Table 8.G-2 and you may use any monitoring results 

conducted for Part 8.G.8.2 to satisfy the monitoring requirement for that parameter for 

Part 8.G.6.3. For radium and uranium, which do not have corresponding benchmarks 

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in Table 8.G-2, there are no applicable benchmarks. The frequency and schedule for 

monitoring for these additional parameters is the same as that specified in Part 6.2.1.2.

Table 8.G-3. Additional Monitoring Requirements for Discharges from Waste Rock and 

Overburden Piles

Supplemental Requirements

Type of Ore Mined

Pollutants of Concern

Total Suspended 

Solids (TSS)

pH Metals, Total 

Tungsten Ore X X Arsenic, Cadmium (H), Copper 

(H), Lead (H), Zinc (H)

Nickel Ore X X Arsenic, Cadmium (H), Copper 

(H), Lead (H), Zinc (H)

Aluminum Ore X X Iron

Mercury Ore X X Nickel (H)

Iron Ore X X Iron (Dissolved)

Platinum Ore Cadmium (H), Copper (H), 

Mercury, Lead (H), Zinc (H)

Titanium Ore X X Iron, Nickel (H), Zinc (H)

Vanadium Ore X X Arsenic, Cadmium (H), Copper 

(H), Lead (H), Zinc (H)

Molybdenum X X Arsenic, Cadmium (H), Copper 

(H), Lead (H), Mercury, Zinc (H)

Uranium, Radium, and 

Vanadium Ore

X X Chemical Oxygen Demand, 

Arsenic, Radium (Dissolved and 

Total), Uranium, Zinc (H)

Note: An “X” indicated for TSS and/or pH means that you are required to monitor for those parameters. (H) indicates 

that hardness must also be measured when this pollutant is measured.

8.G.8.4 Inactive and Unstaffed Sites – Conditional Exemption from No Exposure Requirements 

for Quarterly Visual Assessments and Routine Facility Inspections. As a Sector G facility, if 

you are seeking to exercise a waiver from the quarterly visual assessment and routine 

facility inspection requirements for inactive and unstaffed sites (including temporarily 

inactive sites), you are conditionally exempt from the requirement to certify that “there 

are no industrial materials or activities exposed to stormwater” in Parts 3.1.1 and 3.2.3. 

This exemption is conditioned on the following:

• If circumstances change and your facility becomes active and/or staffed, this 

exception no longer applies and you must immediately begin complying with the 

quarterly visual assessment requirements; and

• EPA retains the authority to revoke this exemption and/or the monitoring waiver 

where it is determined that the discharge causes, has a reasonable potential to 

cause, or contributes to an instream excursion above an applicable water quality 

standard, including designated uses.

Subject to the two conditions above, if your facility is inactive and unstaffed, you are 

waived from the requirement to conduct quarterly visual assessments and routine 

facility inspections. You must still do an annual site inspection in accordance with Part 

3.1. . You are encouraged to inspect your site more frequently where you have reason 

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to believe that severe weather or natural disasters may have damaged control 

measures or increased discharges.

Table 8.G-4. Applicability of the Multi-Sector General Permit to Stormwater Runoff From Active 

Mining and Dressing Sites, Temporarily Inactive Sites, and Sites Undergoing Reclamation

Discharge/Source of Discharge Note/Comment

Piles

Waste rock/overburden If composed entirely of stormwater and not 

combining with mine drainage. See note 

below.

Topsoil --

Roads constructed of waste rock or spent ore

Onsite haul roads If composed entirely of stormwater and not 

combining with mine drainage. See note 

below.

Offsite haul and access roads --

Roads not constructed of waste rock or spent ore

Onsite haul roads Except if mine drainage is used for dust control

Offsite haul and access roads --

Milling/concentrating

Runoff from tailings dams and dikes when 

constructed of waste rock/tailings

Except if process fluids are present and only if 

composed entirely of stormwater and not 

combining with mine drainage. See Note 

below.

Runoff from tailings dams/dikes when not 

constructed of waste rock and tailings

Except if process fluids are present

Concentration building If stormwater only and no contact with piles

Mill site If stormwater only and no contact with piles 

Ancillary areas

Office and administrative building and housing If mixed with stormwater from the industrial 

area

Chemical storage area --

Docking facility Except if excessive contact with waste 

product that would otherwise constitute mine 

drainage

Explosive storage --

Fuel storage (oil tanks/coal piles) --

Vehicle and equipment maintenance 

area/building

--

Parking areas But coverage unnecessary if only employee 

and visitor-type parking

Power plant

Truck wash area Except when excessive contact with waste 

product that would otherwise constitute mine 

drainage

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Table 8.G-4. Applicability of the Multi-Sector General Permit to Stormwater Runoff From Active 

Mining and Dressing Sites, Temporarily Inactive Sites, and Sites Undergoing Reclamation

Discharge/Source of Discharge Note/Comment

Reclamation-related areas

Any disturbed area (unreclaimed) Only if not in active mining area

Reclaimed areas released from reclamation 

requirements prior to Dec. 17, 1990

--

Partially/inadequately reclaimed areas or 

areas not released from reclamation 

requirements 

--

Note: Stormwater runoff from these sources are subject to the NPDES program for stormwater unless mixed with 

discharges subject to 40 CFR Part 440 that are regulated by another permit prior to mixing. Non-stormwater discharges 

from these sources are subject to NPDES permitting and may be subject to the effluent limitation guidelines under 40 

CFR Part 440. Discharges from overburden/waste rock and overburden/waste rock-related areas are not subject to 40 

CFR Part 440 unless: (1) it drains naturally (or is intentionally diverted) to a point source; and (2) combines 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, as well as meeting other eligibility criteria contained in Part 1.1 of the permit. 

Permit applicants bear the initial responsibility for determining the applicable technology-based standard for such 

discharges. EPA recommends that permit applicants 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.9. Termination of Permit Coverage

8.G.9.1 Termination of Permit Coverage for Sites Reclaimed After December 17, 1990. A site or 

a portion of a site that has been released from applicable state or federal reclamation 

requirements after December 17, 1990, is no longer required to maintain coverage 

under this permit. If the site or portion of a site reclaimed after December 17, 1990, was 

not subject to reclamation requirements, the site or portion of the site is no longer 

required to maintain coverage under this permit if the site or portion of the site has 

been reclaimed as defined in Part 8.G.3.5. 

8.G.9.2 Termination of Permit Coverage for Sites Reclaimed Before December 17, 1990. A site or 

portion of a site that was released from applicable state or federal reclamation 

requirements before December 17, 1990, or that was otherwise reclaimed before 

December 17, 1990, is no longer required to maintain coverage under this permit if the 

site or portion of the site has been reclaimed. A site or portion of a site is considered to 

have been reclaimed if: (1) stormwater runoff that comes into contact with raw 

materials, intermediate byproducts, finished products, and waste products does not 

have the potential to cause or contribute to violations of state water quality standards, 

(2) soil disturbing activities related to mining at the sites or portion of the site have been 

completed, (3) the site or portion of the site has been stabilized to minimize soil erosion, 

and (4) as appropriate depending on location, size, and the potential to contribute 

pollutants to stormwater discharges, the site or portion of the site has been 

revegetated, will be amenable to natural revegetation, or will be left in a condition 

consistent with the post-mining land use.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart H – Sector H – Coal Mines and Coal Mining-Related Facilities.

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.H.1 Covered Stormwater Discharges.

The requirements in Subpart H apply to stormwater discharges associated with industrial 

activity from Coal Mines and Coal Mining-Related facilities as identified by the SIC Codes 

specified under Sector H in Table D-1 of Appendix D.

8.H.2 Limitations on Coverage.

8.H.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) Not covered by this 

permit: discharges from pollutant seeps or underground drainage from inactive coal 

mines and refuse disposal areas that do not result from precipitation events, and 

discharges from floor drains in maintenance buildings and other similar drains in mining 

and preparation plant areas.

8.H.2.2 Discharges Subject to Stormwater Effluent Guidelines. (See also Part 1.1.2.4) Not 

authorized by this permit: stormwater discharges subject to an existing effluent limitation 

guideline at 40 CFR Part 434. 

8.H.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).

8.H.3.1 Mining operation - Consists of the active and temporarily inactive phases, and the 

reclamation phase, but excludes the exploration and construction phases.

8.H.3.2 Exploration phase - Entails exploration and land disturbance activities to determine the 

financial viability of a site. The exploration phase is not considered part of “mining 

operations.”

8.H.3.3 Construction phase - Includes the building of site access roads and removal of 

overburden and waste rock to expose mineable coal. The construction phase is not 

considered part of “mining operations.”

8.H.3.4 Active phase - Activities including the extraction, removal or recovery of coal. For 

surface mines, this definition does not include any land where grading has returned the 

earth to a desired contour and reclamation has begun. This definition is derived from 

the definition of “active mining area” found at 40 CFR 434.11(b). The active phase is 

considered part of “mining operations.”

8.H.3.5 Reclamation phase - Activities undertaken, in compliance with applicable mined land 

reclamation requirements, following the cessation of the “active phase”, intended to 

return the land to an appropriate post-mining land use. The reclamation phase is 

considered part of "mining operations."

8.H.3.6 Active coal mining facility - A place where work or other activity related to the 

extraction, removal, or recovery of coal is being conducted. For surface mines, this 

definition does not include any land where grading has returned the earth to a desired 

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contour and reclamation has begun. This definition is derived from the definition of 

“active mining area” found at 40 CFR 434.11(b).

8.H.3.7 Inactive coal mining facility - A site or portion of a site where coal mining and/or milling 

occurred in the past but is not an active facility as defined above, and where the 

inactive portion is not covered by an active mining permit issued by the applicable 

State or Federal agency. An inactive coal mining facility has an identifiable owner / 

operator. Sites where mining claims are being maintained prior to disturbances 

associated with the extraction, beneficiation, or processing of mined materials and sites 

where minimal activities are undertaken for the sole purpose of maintaining a mining 

claim are not considered either active or inactive mining facilities and do not require 

an NPDES industrial stormwater permit.

8.H.3.8 Temporarily inactive coal mining facility - A site or portion of a site where coal mining 

and/or milling occurred in the past but currently are not being actively undertaken, 

and the facility is covered by an active mining permit issued by the applicable State or 

Federal agency.

8.H.3.9 Final Stabilization - A site or portion of a site is “finally stabilized” when it has 

implemented all applicable Federal and State reclamation requirements.

8.H.4 Technology-Based Effluent Limits for Clearing, Grading, and Excavation Activities.

Clearing, grading, and excavation activities being conducted as part of the exploration 

and construction phase of mining activities are covered under this permit. During clearing, 

grading, and excavation activities you must comply with all applicable effluent limits in Part 2 of 

this permit, and you must also comply with the following effluent limits which are from the 2012 

version of EPA’s Construction General Permit (CGP). Contained in Part 8.H.4 are the basic 

requirements of EPA’s CGP, however, you should consult EPA’s CGP to ensure full compliance is 

achieved.

8.H.4.1.1 Installation of Stormwater Controls (See Part 2.1.1.3 of EPA’s CGP)

• By the time construction commences, stormwater controls to treat 

initial disturbance must be installed and made operational.

• Controls must be installed along perimeter areas of site that will 

receive stormwater flow. 

• Remaining controls must be installed as soon as conditions allow

8.H.4.1.2 Maintenance of Stormwater Controls (See Part 2.1.1.4 of EPA’s CGP) 

• At any time, if a stormwater control needs repair or replacement 

to continue operating effectively;

o Initiate work to fix the problem immediately

o Complete work by end of the next work day

• If a stormwater control must be replaced or significantly repaired, 

work must be completed within 7 days, unless infeasible

8.H.4.1.3 Natural Buffers (See Part 2.1.2.1 and Appendix G of EPA’s CGP). If earth 

disturbances will occur within 50 feet of a water of the U.S., additional 

protections apply. You must comply with 1 of 3 compliance alternatives:

1. Provide a 50-foot undisturbed natural buffer between construction 

disturbances 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 

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in combination, achieve a sediment load reduction that is 

equivalent to a 50-foot 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 buffer. 

There are exceptions when buffer requirements don’t apply:

1. There is no stormwater discharge from construction disturbances to 

the water of the U.S.; 

2. The natural buffer has already been eliminated by preexisting 

development disturbances; or

3. The disturbance is for the construction of a water-dependent 

structure (pier, boat ramp) or construction approved under a CWA 

section 404 permit. 

8.H.4.1.4 Sediment Discharge Controls (See Parts 2.1.2.2 – 2.1.3.3 of EPA’s CGP) 

Perimeter controls:

• Install sediment controls along those perimeter areas of your site that 

will receive stormwater; and

• Remove sediment before it has accumulated to one-half of the 

above-ground height of any perimeter control.

Sediment track-out:

• Restrict vehicle use to designated exit points; 

• Use appropriate stabilization techniques; and

• Remove tracked-out sediment by end of the work day. 

Soil or sediment stockpiles:

• Locate the piles outside of any natural buffers established under Part

8.H.4.1.3; 

• Protect from contact with stormwater runoff using temporary barriers; 

and

• Provide cover or appropriate temporary stabilization, where 

practicable. 

Storm drain inlets:

• Install inlet protection measures (at sewer inlets that you can access) 

that remove sediment prior to discharge into storm drain

• Can be removed in the event of flood conditions or to prevent 

erosion; and

• Clean, or remove and replace, the protection measures as sediment 

accumulates, the filter becomes clogged, and/or performance is 

compromised

Sediment basins

• Provide storage for either (1) the 2-year, 24-hour storm, or (2) 3,600 

cubic feet per acre drained; and

• Utilize outlet structures that withdraw water from surface, unless 

infeasible. 

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• Prevent erosion of (1) the sediment basin using stabilization controls

(e.g., erosion control blankets), and (2) the inlet and outlet using

erosion controls and velocity dissipation devices; and

• Locate sediment basins outside any natural buffers established under 

Part 8.H.4.1.3.

Other related requirements: 

• Minimize amount of soil exposed at any one time during construction

• Minimize steep slope disturbances

• Minimize soil compaction

• Direct stormwater to the site’s vegetated areas unless infeasible

8.H.4.1.5 Restrictions on Use of Treatment Chemicals (See Part 2.1.3.3 of EPA’s CGP). 

If you will use treatment chemicals at your site, you are subject to the 

following minimum requirements:

• Use conventional E&S controls prior to and after application of 

chemical; 

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

rate; 

• Minimize discharge risk from stored chemicals; 

• Apply in accordance with state/local requirements, good engineering 

practices, and dosage recommendations of chemical supplier; and

• Ensure proper training. 

The use of cationic treatment chemicals is not allowed under the MSGP 

unless EPA specifically authorizes its use:

• You will need to contact the applicable EPA Regional Office if you 

intend to use cationic treatment chemicals at your site to determine 

what information EPA requires to evaluate your request; and

• Use of cationic chemicals will likely be subject to additional 

requirements to ensure protection of water quality standards.

8.H.4.1.6 Site Stabilization (See Part 2.2 of EPA’s CGP) 

When to initiate stabilization:

• By no later than the end of the next work day after construction work 

in an area has stopped permanently or temporarily

When stabilization must be completed:

• If using vegetative measures, by no later than 14 days after initiating 

stabilization, the operator must:

o Seed or plant the area, and provide temporary cover to 

protect planted area; and

o Once established, vegetation must cover at least 70% of 

stabilized area based on density of native vegetation. 

• If using non-vegetative stabilization, by no later than 14 days after 

initiating stabilization, the operator must:

o Install or apply all non-vegetative measures; and

o Cover all areas of exposed soil. 

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Exceptions:

• Arid, semi-arid (if construction occurs during seasonally dry period), or 

drought-stricken areas:

o Within 14 days of stopping construction work in an area, install 

any necessary non-vegetative stabilization measures; 

o Initiate vegetative stabilization as soon conditions on the site 

allow; 

o Document the schedule that will be followed for initiating and

completing vegetative stabilization; and

o Area must be planted so that within 3 years 70% cover 

requirement is met. 

• Sites affected by severe storm events or other unforeseen 

circumstances: 

o Initiate vegetative stabilization as soon conditions on the site 

allow; 

o Document the schedule that will be followed for initiating and 

completing vegetative stabilization; and

o Area must be planted so that within 3 years 70% cover 

requirement is met. 

8.H.4.2 Pollution Prevention Requirements (See Part 2.3 of EPA’s CGP) 

8.H.4.2.1 Prohibited Non-Stormwater Discharges: 

• Wastewater from washout of concrete, unless managed by an 

appropriate control; 

• Wastewater from washout and cleanout of stucco, paint, form release 

oils, curing compounds, and other construction materials, unless 

managed by an appropriate control; 

• Fuels, oils, or other pollutants used for O&M of vehicles or equipment; 

• Soaps or solvents used in vehicle or equipment washing; and

• Toxic or hazardous substances from a spill or other release

8.H.4.2.2 Design and Location Requirements: 

• Use effective means of preventing discharge from pollution sources: 

o Minimize exposure; or

o Use secondary containment or equivalent measures; or

o Provide spill kits. 

• Use leak-proof containers for all chemicals: 

o Locate away from surface waters, storm sewer inlets, and 

drainageways; and

o Clean up spills immediately – do not clean by hosing area 

down

8.H.4.3 Water-Quality Requirements

Stricter requirements apply if your site will discharge to an impaired water or a water 

that is identified by your state, tribe, or EPA as a Tier 2 or Tier 2.5 for antidegradation 

purposes: 

• More rapid stabilization of exposed areas: 

o Complete initial stabilization activities within 7 days of stopping 

construction work.

• More frequent site inspections: 

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o Once every 7 days and within 24 hours of a storm event of 0.25 inches

or greater. 

8.H.4.4 Inspection Requirements (See Part 4.1 of EPA’s CGP) 

8.H.4.4.1 Inspection Frequency

• At least once every 7 calendar days, or

• Once every 14 calendar days and within 24 hours of a storm event of 0.25 

inches or greater. Note:

o Inspections only required during working hours; 

o Inspections not required during unsafe conditions; and 

o If you choose to inspect once every 14 days, you must have a method 

for measuring rainfall amount on site (either rain gauge or 

representative weather station)

8.H.4.4.2 Reductions in Inspection Frequency

• Stabilized areas: You may reduce the frequency of inspections to once

per month in any area of your site where the stabilization as occurred 

pursuant to Part 8.H.4.1.6. 

• Arid, semi-arid, and drought stricken areas: if construction is occurring during 

the seasonally dry period or during a period in which drought is predicted to 

occur, you may reduce inspections to once per month and within 24 hours of 

a 0.25 inch storm event. 

• Frozen conditions: You may temporarily suspend or reduce inspections (to 

once per month) until thawing conditions occur if frozen conditions are 

continuous and disturbed areas have been stabilized. 

8.H.4.4.3 Areas to be Inspected:

You must at a minimum inspect the following areas:

• All disturbed areas; 

• All stormwater controls and pollution prevention measures; 

• All locations where stabilization measures have been implemented; 

• Material, waste, borrow, or equipment storage and maintenance areas; 

• All areas where stormwater flows; and

• All points of discharge. 

8.H.4.4.4 What to Check for During Inspections

At a minimum you must check:

• Whether all stormwater controls are installed, operational, and working as 

intended; 

• If any new or modified stormwater controls are needed; 

• Conditions that could lead to a spill or leak; and

• Visual signs of erosion/sedimentation at points of discharge. 

If a discharge is occurring:

• The quality and characteristics of the discharge; and

• Whether controls are operating effectively

8.H.4.4.5 Inspection Report 

Within 24 hours of an inspection, complete a report that includes:

• Inspection date; 

• Name and title of inspector(s); 

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• Summary of inspection findings ; 

• Rainfall amount that triggered the inspection (if applicable); 

• If it was unsafe to inspect a portion of the site, include documentation of the 

reason and the location(s;) 

• Each inspection report must be signed; and

• Must keep a current copy of all reports at the site or at an easily accessible 

location. 

8.H.5 Additional Technology-Based Effluent Limits.

8.H.5.1 Good Housekeeping Measures. (See also Part 2.1.2.2) As part of your good 

housekeeping program, use sweepers and covered storage, watering haul roads to 

minimize dust generation, and conserving vegetation to minimize erosion where 

practicable. 

8.H.5.2 Preventive Maintenance. (See also Part 2.1.2.3) Perform inspections or other equivalent 

measures of storage tanks and pressure lines of fuels, lubricants, hydraulic fluid, and 

slurry to prevent leaks due to deterioration or faulty connections.

8.H.6 Additional SWPPP Requirements.

8.H.6.1 Other Applicable Regulations. Most active coal mining-related areas (SIC Codes 1221-

1241) are subject to sediment and erosion control regulations of the U.S. Office of 

Surface Mining (OSM) that enforces the Surface Mining Control and Reclamation Act 

(SMCRA). OSM has granted authority to most coal-producing states to implement 

SMCRA through State SMCRA regulations. All SMCRA requirements regarding control of 

stormwater-related pollutant discharges must be addressed and then documented 

with the SWPPP (directly or by reference).

8.H.6.2 Site Map. (See also Part 5.2.2) Document in your SWPPP where any of the following may 

be exposed to precipitation or surface runoff: haul and access roads; railroad spurs, 

sliding, and internal hauling lines; conveyor belts, chutes, and aerial tramways; 

equipment storage and maintenance yards; coal handling buildings and structures; 

and inactive mines and related areas; acidic spoil, refuse, or unreclaimed disturbed 

areas; and liquid storage tanks containing pollutants such as caustics, hydraulic fluids, 

and lubricants.

8.H.6.3 Potential Pollutant Sources. (See also Part 5.2.3) Document in your SWPPP the following 

sources and activities that have potential pollutants associated with them: truck traffic 

on haul roads and resulting generation of sediment subject to runoff and dust 

generation; fuel or other liquid storage; pressure lines containing slurry, hydraulic fluid, or 

other potential harmful liquids; and loading or temporary storage of acidic refuse or 

spoil.

8.H.7 Additional Inspection Requirements.

8.H.7.1 Inspections of Active Mining-Related Areas. (See also Part 3) Except for areas of the site 

subject to clearing, grading, and/or excavation activities conducted as part of the 

exploration and construction phase, which are subject to Part 8.H.4.2.4, perform routine

inspections of active mining areas covered by this permit, corresponding with the 

inspections as performed by SMCRA inspectors, of all mining-related areas required by 

SMCRA. Also maintain the records of the SMCRA authority representative. See Part 

8.H.8.1 for inspection requirements for inactive and unstaffed sties.

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8.H.7.2 Sediment and Erosion Control. (See also Part 2.1.2.5) As indicated in Part 8.H.6.1, SMCRA 

requirements regarding sediment and erosion control measures must be complied with 

for those areas subject to SMCRA authority, including inspection requirements.

8.H.7.3 Routine Site Inspections. (See also Part 3.1) Your inspection program must include 

inspections for pollutants entering the drainage system from activities located on or 

near coal mining-related areas. Among the areas to be inspected are haul and access 

roads; railroad spurs, sliding, and internal hauling lines; conveyor belts, chutes, and 

aerial tramways; equipment storage and maintenance yards; coal handling buildings 

and structures; and inactive mines and related areas.

8.H.8 Sector-Specific Benchmarks.

Table 8.H-1 identifies benchmarks that apply to the specific subsectors of Sector H. These 

benchmarks apply to both your primary industrial activity and any co-located industrial 

activities.

Table 8.H-1.

Subsector 

(You may be subject to requirements for 

more than one sector/subsector)

Parameter

Benchmark 

Monitoring 

Concentration

Subsector H1. Coal Mines and Related 

Areas 

(SIC 1221-1241)

Total Aluminum 0.75 mg/L

Total Iron 1.0 mg/L

Total Suspended Solids (TSS) 100 mg/L

8.H.8.1 Inactive and Unstaffed Sites – Conditional Exemption from No Exposure Requirement for 

Routine Inspections, Quarterly Visual Assessments, and Benchmark Monitoring. As a 

Sector H facility, if you are seeking to exercise a waiver from either the quarterly visual 

assessment or the benchmark monitoring requirements for inactive and unstaffed sites 

(including temporarily inactive sites), you are conditionally exempt from the 

requirement to certify that “there are no industrial materials or activities exposed to 

stormwater” in Parts 3.3.3 and 6.2.1.3, respectively. Additionally, if you are seeking to 

reduce your required routine inspection frequency, as is allowed under Part 3.1.1, you 

are also conditionally exempt from the requirement to certify that “there are no 

industrial materials or activities exposed to stormwater.” These conditional exemptions 

are based on the following requirements:

• If circumstances change and your facility becomes active and/or staffed, this 

exception no longer applies and you must immediately begin complying with the 

applicable benchmark monitoring requirements as if you were in your first year of 

permit coverage, and the quarterly visual assessment requirements; and

• EPA retains the authority to revoke this exemption and/or the monitoring waiver 

where it is determined that the discharge causes, has a reasonable potential to 

cause or contribute to an instream excursion above an applicable water quality 

standard, including designated uses.

Subject to the two conditions above, if your facility is inactive and unstaffed, you are 

waived from the requirement to conduct quarterly visual assessments and routine 

facility inspections. You must still do an annual site inspection in accordance with Part 

3.1. You are encouraged to inspect your site more frequently where you have reason 

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to believe that severe weather or natural disasters may have damaged control 

measures or increased discharges.

8.H.9 Termination of Permit Coverage

8.H.9.1 Termination of Permit Coverage for Sites Reclaimed After December 17, 1990. A site or 

a portion of a site that has been released from applicable state or federal reclamation 

requirements after December 17, 1990, is no longer required to maintain coverage 

under this permit. If the site or portion of a site reclaimed after December 17, 1990, was 

not subject to reclamation requirements, the site or portion of the site is no longer 

required to maintain coverage under this permit if the site or portion of the site has 

been reclaimed as defined in Part 8.H.3.5. 

8.H.9.2 Termination of Permit Coverage for Sites Reclaimed Before December 17, 1990. A site or 

portion of a site that was released from applicable state or federal reclamation 

requirements before December 17, 1990, or that was otherwise reclaimed before 

December 17, 1990, is no longer required to maintain coverage under this permit if the 

site or portion of the site has been reclaimed. A site or portion of a site is considered to 

have been reclaimed if: (1) stormwater runoff that comes into contact with raw 

materials, intermediate byproducts, finished products, and waste products does not 

have the potential to cause or contribute to violations of state water quality standards, 

(2) soil disturbing activities related to mining at the sites or portion of the site have been 

completed, (3) the site or portion of the site has been stabilized to minimize soil erosion, 

and (4) as appropriate depending on location, size, and the potential to contribute 

pollutants to stormwater discharges, the site or portion of the site has been 

revegetated, will be amenable to natural revegetation, or will be left in a condition 

consistent with the post-mining land use.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart I – Sector I – Oil and Gas Extraction.

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.I.1 Covered Stormwater Discharges.

The requirements in Subpart I apply to stormwater discharges associated with industrial 

activity from Oil and Gas Extraction facilities as identified by the SIC Codes specified under 

Sector I in Table D-1 of Appendix D of the permit.

8.I.1.1 Discharges of stormwater runoff from field activities or operations associated with oil and 

gas exploration, production, processing, or treatment operations or transmission facilities 

are exempt from NPDES permit coverage unless, in accordance with 40 CFR 

122.26(c)(1)(iii), the facility:

• Has had a discharge of stormwater resulting in the discharge of a reportable 

quantity for which notification is or was required pursuant to 40 CFR 117.21 or 40 

CFR 302.6 at anytime since November 16, 1987; or 

• Has had a discharge of stormwater resulting in the discharge of a reportable 

quantity for which notification is or was required pursuant to 40 CFR 110.6 at any 

time since November 16, 1987; or 

• Contributes to a violation of a water quality standard.

Any stormwater discharges that require permit coverage as a result of meeting one of 

the conditions of 122.26(c)(1)(iii) may be covered under this permit unless otherwise 

required to obtain coverage under an alternative NPDES general permit or an individual 

NPDES permit as specified in Part 1.6.1.

8.I.2 Limitations on Coverage.

8.I.2.1 Stormwater Discharges Subject to Effluent Limitation Guidelines. (See also Part 1.1.4.5) 

This permit does not authorize stormwater discharges from petroleum drilling operations 

that are subject to nationally established effluent limitation guidelines found at 40 CFR 

Part 435, respectively.

8.I.2.2 Non-Stormwater Discharges. Discharges of vehicle and equipment washwater, 

including tank cleaning operations, are not authorized by this permit. Alternatively, 

washwater discharges must be authorized under a separate NPDES permit, or be 

discharged to a sanitary sewer in accordance with applicable industrial pretreatment 

requirements.

8.I.3 Additional Technology-Based Effluent Limits.

8.I.3.1 Vegetative Controls. Implement vegetative practices designed to preserve existing 

vegetation, where attainable, and revegetate open areas as soon as practicable after 

grade drilling. Implement appropriate vegetative practices, such as the following (or 

equivalent measures): temporary or permanent seeding, mulching, sod stabilization, 

vegetative buffer strips, and tree protection practices. Begin implementing appropriate 

vegetative practices on all disturbed areas within 14 days following the last activity in 

that area.

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8.I.4 Additional SWPPP Requirements.

8.I.4.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP where any of 

the following may be exposed to precipitation or surface runoff: Reportable Quantity 

(RQ) releases; locations used for the treatment, storage, or disposal of wastes; 

processing areas and storage areas; chemical mixing areas; construction and drilling 

areas; all areas subject to the effluent guidelines requirements for “No Discharge” in 

accordance with 40 CFR 435.32; and the structural controls to achieve compliance 

with the “No Discharge” requirements.

8.I.4.2 Potential Pollutant Sources. (See also Part 5.2.3) Also document in your SWPPP the 

following sources and activities that have potential pollutants associated with them: 

chemical, cement, mud, or gel mixing activities; drilling or mining activities; and 

equipment cleaning and rehabilitation activities. In addition, include information about 

the reportable quantity (RQ) release that triggered the permit application requirements: 

the nature of the release (e.g., spill of oil from a drum storage area), amount of oil or 

hazardous substance released, amount of substance recovered, date of the release, 

cause of the release (e.g., poor handling techniques and lack of containment in the 

area), areas affected by the release (i.e., land and water), procedure to clean up 

release, actions or procedures implemented to prevent or improve response to a release, 

and remaining potential contamination of stormwater from release (taking into account 

human health risks, the control of drinking water intakes, and the designated uses of the 

receiving water).

8.I.4.3 Erosion and Sedimentation Control. (See also Part 2.1.2.5) Unless covered by EPA’s

Construction General Permit (CGP), the additional documentation requirements for 

sediment and erosion controls for well drillings and sand/shale mining areas include the 

following:

8.I.4.3.1 Site Description. Also include a description in your SWPPP of the nature of the 

exploration activity, estimates of the total area of site and area disturbed due 

to exploration activity, an estimate of runoff coefficient of the site, a site 

drainage map, including approximate slopes, and the names of all receiving 

waters.

8.I.4.3.2 Vegetative Controls. Document vegetative practices used consistent with 

Part 8.I.3.1 in the SWPPP.

8.I.5 Additional Inspection Requirements.

All erosion and sedimentation control measures must be inspected either: 1) every 7 

days; or 2) once every 14 calendar days and within 24 hours of a storm event of 0.25 inches or 

greater. 

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart J – Sector J – Non-Metallic Mineral Mining and Dressing.

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.J.1 Covered Stormwater Discharges.

The requirements in Subpart J apply to stormwater discharges associated with industrial 

activity from Active and Inactive Non-Metallic Mineral Mining and Dressing facilities as identified 

by the SIC Codes specified under Sector J in Table D-1 of Appendix D of the permit.

8.J.1.1 Covered Discharges from Inactive Facilities. All stormwater discharges.

8.J.1.2 Covered Discharges from Active and Temporarily Inactive Facilities. All stormwater 

discharges, except for most stormwater discharges subject to the existing effluent 

limitation guideline at 40 CFR Part 436. Mine dewatering discharges composed entirely 

of stormwater or uncontaminated ground water seepage from: construction sand and 

gravel, industrial sand, and crushed stone mining facilities in Regions 1, 2, 3, 6, 9, and 10 

are covered by this permit. 

8.J.1.3 Covered Discharges from Exploration and Construction of Non-Metallic Mineral Mining 

Facilities. All stormwater discharges.

8.J.1.4 Covered Discharges from Sites Undergoing Reclamation. All stormwater discharges.

8.J.2 Limitations on Coverage.

Most stormwater discharges subject to an existing effluent limitation guideline at 40 CFR 

Part 436 are not authorized by this permit. The exceptions to this limitation, which are covered by 

this permit, are mine dewatering discharges composed entirely of stormwater or 

uncontaminated ground water seepage from construction sand and gravel, industrial sand, and 

crushed stone mining facilities in Regions 1, 2, 3, 6, 9, and 10.

8.J.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).

8.J.3.1 Mining operations - Consists of the active and temporarily inactive phases, and the 

reclamation phase, but excludes the exploration and construction phases.

8.J.3.2 Exploration phase - Entails exploration and land disturbance activities to determine the 

financial viability of a site. The exploration phase is not considered part of “mining 

operations.”

8.J.3.3 Construction phase - Includes the building of site access roads and removal of 

overburden and waste rock to expose mineable minerals. The construction phase is 

not considered part of “mining operations”.

8.J.3.4 Active phase - Activities including the extraction, removal or recovery of minerals. For 

surface mines, this definition does not include any land where grading has returned the 

earth to a desired contour and reclamation has begun. This definition is derived from 

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the definition of “active mining area” found at 40 CFR 440.132(a). The active phase is 

considered part of “mining operations.”

8.J.3.5 Reclamation phase - Activities undertaken, in compliance with applicable mined land 

reclamation requirements, following the cessation of the “active phase”, intended to 

return the land to an appropriate post-mining land use. The reclamation phase is 

considered part of "mining operations".

NOTE: 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).

8.J.3.6 Active Mineral Mining Facility - A place where work or other activity related to the 

extraction, removal, or recovery of minerals is being conducted. For surface mines, this 

definition does not include any land where grading has returned the earth to a desired 

contour and reclamation has begun. This definition is derived from the definition of 

“active mining area” found at 40 CFR 440.132(a). 

8.J.3.7 Inactive Mineral Mining Facility - A site or portion of a site where mineral mining and/or 

milling occurred in the past but is not an active facility as defined above, and where 

the inactive portion is not covered by an active mining permit issued by the applicable 

State or Federal agency. An inactive mineral mining facility has an identifiable owner / 

operator. Sites where mining claims are being maintained prior to disturbances 

associated with the extraction, beneficiation, or processing of mined materials, and 

sites where minimal activities are undertaken for the sole purpose of maintaining a 

mining claim are not considered either active or inactive mining facilities and do not 

require an NPDES industrial stormwater permit.

8.J.3.8 Temporarily Inactive Mineral Mining Facility - A site or portion of a site where metal 

mining and/or milling occurred in the past but currently are not being actively 

undertaken, and the facility is covered by an active mining permit issued by the 

applicable State or Federal agency.

8.J.3.9 Final Stabilization - a site or portion of a site is “finally stabilized” when it has 

implemented all applicable Federal and State reclamation requirements.

8.J.3.10 Uncontaminated - Free from the presence of pollutants attributable to industrial 

activity.

8.J.4 Technology-Based Effluent Limits for Clearing, Grading, and Excavation Activities.

Clearing, grading, and excavation activities being conducted as part of the exploration 

and construction phase of mining activities are covered under this permit. During clearing,

grading, and excavation activities you must comply with all applicable effluent limits in Part 2 of 

this permit, and you must also comply with the following effluent limits which are from the 2012 

version of EPA’s Construction General Permit (CGP). Contained in Part 8.J.4 are the basic 

requirements of EPA’s CGP, however, you should consult EPA’s CGP to ensure full compliance is 

achieved.

8.J.4.1.1 Installation of Stormwater Controls (See Part 2.1.1.3 of EPA’s CGP)

• By the time construction commences, stormwater controls to treat 

initial disturbance must be installed and made operational.

• Controls must be installed along perimeter areas of site that will 

receive stormwater flow. 

• Remaining controls must be installed as soon as conditions allow

8.J.4.1.2 Maintenance of Stormwater Controls (See Part 2.1.1.4 of EPA’s CGP) 

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• At any time, if a stormwater control needs repair or replacement 

to continue operating effectively;

o Initiate work to fix the problem immediately

o Complete work by end of the next work day

• If a stormwater control must be replaced or significantly repaired, 

work must be completed within 7 days, unless infeasible

8.J.4.1.3 Natural Buffers (See Part 2.1.2.1 and Appendix G of EPA’s CGP). If earth 

disturbances will occur within 50 feet of a water of the U.S., additional 

protections apply. You must comply with 1 of 3 compliance alternatives:

4. Provide a 50-foot undisturbed natural buffer between construction 

disturbances and the water of the U.S.; or

5. 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 buffer; or

6. 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 buffer. 

There are exceptions when buffer requirements don’t apply:

4. There is no stormwater discharge from construction disturbances to 

the water of the U.S.;

5. The natural buffer has already been eliminated by preexisting 

development disturbances; or

6. The disturbance is for the construction of a water-dependent 

structure (pier, boat ramp) or construction approved under a CWA 

section 404 permit. 

8.J.4.1.4 Sediment Discharge Controls (See Parts 2.1.2.2 – 2.1.3.3 of EPA’s CGP) 

Perimeter controls: 

• Install sediment controls along those perimeter areas of your site that 

will receive stormwater; and

• Remove sediment before it has accumulated to one-half of the 

above-ground height of any perimeter control.

Sediment track-out:

• Restrict vehicle use to designated exit points; 

• Use appropriate stabilization techniques; and

• Remove tracked-out sediment by end of the work day. 

Soil or sediment stockpiles:

• Locate the piles outside of any natural buffers established under Part

8.G.4.1.3; 

• Protect from contact with stormwater runoff using temporary barriers; 

and

• Provide cover or appropriate temporary stabilization, where 

practicable. 

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Storm drain inlets:

• Install inlet protection measures (at sewer inlets that you can access) 

that remove sediment prior to discharge into storm drain

• Can be removed in the event of flood conditions or to prevent 

erosion; and

• Clean, or remove and replace, the protection measures as sediment 

accumulates, the filter becomes clogged, and/or performance is 

compromised

Sediment basins

• Provide storage for either (1) the 2-year, 24-hour storm, or (2) 3,600 

cubic feet per acre drained; and

• Utilize outlet structures that withdraw water from surface, unless 

infeasible. 

• Prevent erosion of (1) the sediment basin using stabilization controls

(e.g., erosion control blankets), and (2) the inlet and outlet using

erosion controls and velocity dissipation devices; and

• Locate sediment basins outside any natural buffers established under 

Part 8.J.4.1.3.

Other related requirements: 

• Minimize amount of soil exposed at any one time during construction

• Minimize steep slope disturbances

• Minimize soil compaction

• Direct stormwater to the site’s vegetated areas unless infeasible

8.J.4.1.5 Restrictions on Use of Treatment Chemicals (See Part 2.1.3.3 of EPA’s CGP). 

If you will use treatment chemicals at your site, you are subject to the 

following minimum requirements:

• Use conventional E&S controls prior to and after application of 

chemical; 

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

rate; 

• Minimize discharge risk from stored chemicals; 

• Apply in accordance with state/local requirements, good engineering 

practices, and dosage recommendations of chemical supplier; and

• Ensure proper training. 

The use of cationic treatment chemicals is not allowed under the MSGP 

unless EPA specifically authorizes its use:

• You will need to contact the applicable EPA Regional Office if you 

intend to use cationic treatment chemicals at your site to determine 

what information EPA requires to evaluate your request; and

• Use of cationic chemicals will likely be subject to additional 

requirements to ensure protection of water quality standards.

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8.J.4.1.6 Site Stabilization (See Part 2.2 of EPA’s CGP) 

When to initiate stabilization:

• By no later than the end of the next work day after construction work 

in an area has stopped permanently or temporarily

When stabilization must be completed:

• If using vegetative measures, by no later than 14 days after initiating 

stabilization, the operator must:

o Seed or plant the area, and provide temporary cover to 

protect planted area; and

o Once established, vegetation must cover at least 70% of 

stabilized area based on density of native vegetation. 

• If using non-vegetative stabilization, by no later than 14 days after 

initiating stabilization, the operator must:

o Install or apply all non-vegetative measures; and

o Cover all areas of exposed soil. 

Exceptions:

• Arid, semi-arid (if construction occurs during seasonally dry period), or 

drought-stricken areas:

o Within 14 days of stopping construction work in an area, install 

any necessary non-vegetative stabilization measures; 

o Initiate vegetative stabilization as soon conditions on the site 

allow; 

o Document the schedule that will be followed for initiating and 

completing vegetative stabilization; and

o Area must be planted so that within 3 years 70% cover 

requirement is met. 

• Sites affected by severe storm events or other unforeseen 

circumstances: 

o Initiate vegetative stabilization as soon conditions on the site 

allow; 

o Document the schedule that will be followed for initiating and 

completing vegetative stabilization; and

o Area must be planted so that within 3 years 70% cover 

requirement is met. 

8.J.4.2 Pollution Prevention Requirements (See Part 2.3 of EPA’s CGP) 

8.J.4.2.1 Prohibited Non-Stormwater Discharges: 

• Wastewater from washout of concrete, unless managed by an 

appropriate control; 

• Wastewater from washout and cleanout of stucco, paint, form release 

oils, curing compounds, and other construction materials, unless 

managed by an appropriate control; 

• Fuels, oils, or other pollutants used for O&M of vehicles or equipment; 

• Soaps or solvents used in vehicle or equipment washing; and

• Toxic or hazardous substances from a spill or other release

8.J.4.2.2 Design and Location Requirements: 

• Use effective means of preventing discharge from pollution sources: 

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o Minimize exposure; or

o Use secondary containment or equivalent measures; or

o Provide spill kits. 

• Use leak-proof containers for all chemicals: 

o Locate away from surface waters, storm sewer inlets, and 

drainageways; and

o Clean up spills immediately – do not clean by hosing area 

down

8.J.4.3 Water-Quality Requirements

Stricter requirements apply if your site will discharge to an impaired water or a water 

that is identified by your state, tribe, or EPA as a Tier 2 or Tier 2.5 for antidegradation 

purposes: 

• More rapid stabilization of exposed areas: 

o Complete initial stabilization activities within 7 days of stopping 

construction work.

• More frequent site inspections: 

o Once every 7 days and within 24 hours of a storm event of 0.25 inches

or greater. 

8.J.4.4 Inspection Requirements (See Part 4.1 of EPA’s CGP) 

8.J.4.4.1 Inspection Frequency

• At least once every 7 calendar days; or

• Once every 14 calendar days and within 24 hours of a storm event of 0.25 

inches or greater. 

• Note:

o Inspections only required during working hours; 

o Inspections not required during unsafe conditions; and 

o If you choose to inspect once every 14 days, you must have a method 

for measuring rainfall amount on site (either rain gauge or 

representative weather station)

8.J.4.4.2 Reductions in Inspection Frequency

• Stabilized areas: You may reduce the frequency of inspections to once per 

month in any area of your site where the stabilization as occurred pursuant to 

Part 8.J.4.1.6.

• Arid, semi-arid, and drought stricken areas: if construction is occurring during 

the seasonally dry period or during a period in which drought is predicted to 

occur, you may reduce inspections to once per month and within 24 hours of 

a 0.25 inch storm event. 

• Frozen conditions: You may temporarily suspend or reduce inspections (to 

once per month) until thawing conditions occur if frozen conditions are 

continuous and disturbed areas have been stabilized. 

8.J.4.4.3 Areas to be Inspected:

You must at a minimum inspect the following areas:

• All disturbed areas; 

• All stormwater controls and pollution prevention measures; 

• All locations where stabilization measures have been implemented; 

• Material, waste, borrow, or equipment storage and maintenance areas; 

• All areas where stormwater flows; and

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• All points of discharge. 

8.J.4.4.4 What to Check for During Inspections

At a minimum you must check:

• Whether all stormwater controls are installed, operational, and working as 

intended; 

• If any new or modified stormwater controls are needed; 

• Conditions that could lead to a spill or leak; and

• Visual signs of erosion/sedimentation at points of discharge. 

If a discharge is occurring:

• The quality and characteristics of the discharge; and

• Whether controls are operating effectively

8.J.4.4.5 Inspection Report

Within 24 hours of an inspection, complete a report that includes:

• Inspection date; 

• Name and title of inspector(s); 

• Summary of inspection findings ; 

• Rainfall amount that triggered the inspection (if applicable); 

• If it was unsafe to inspect a portion of the site, include documentation of the 

reason and the location(s); 

• Each inspection report must be signed; and

• Must keep a current copy of all reports at the site or at an easily accessible 

location. 

8.J.5 Additional Technology-Based Effluent Limits.

8.J.5.1 Employee Training. Conduct employee training at least annually at active and 

temporarily inactive sites. (See also Part 2.1.2.8). 

8.J.5.2 Stormwater Controls. Apart from the control measures you implement to meet your Part 

2 effluent limits, where necessary to minimize pollutant discharges, implement the 

following control measures at your site. The potential pollutants identified in Part 8.J.5.3 

shall determine the priority and appropriateness of the control measures selected.

8.J.5.2.1 Stormwater Diversions: Divert stormwater away from potential pollutant 

sources where practicable. The following are some control measure options: 

interceptor or diversion controls (e.g., dikes, swales, curbs, or berms); pipe 

slope drains; subsurface drains; conveyance systems (e.g., channels or 

gutters, open-top box culverts, and waterbars; rolling dips and road sloping; 

roadway surface water deflector and culverts); or their equivalents.

8.J.5.2.2 Capping: When capping is necessary to minimize pollutant discharges in 

stormwater, identify the source being capped and the material used to 

construct the cap.

8.J.5.2.3 Treatment: If treatment of stormwater (e.g., chemical or physical systems, oil 

and water separators, artificial wetlands) is necessary to protect water quality, 

describe the type and location of treatment used. Passive and/or active 

treatment of stormwater runoff is encouraged. Treated runoff may be 

discharged as a stormwater source regulated under this permit provided the 

discharge is not combined with discharges subject to effluent limitation 

guidelines for the Mineral Mining and Processing Point Source Category (40 

CFR Part 436). 

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8.J.5.3 Discharge Testing: (See also Part 5.2.4.4) Test or evaluate all outfalls covered under this 

permit for the presence of specific mining-related non-stormwater discharges such as 

discharges subject to effluent limitations guidelines (e.g., 40 CFR Part 436). Alternatively 

(if applicable), you may keep a certification with your SWPPP, per Part 8.J.6.5. 

8.J.6 Additional SWPPP Requirements.

The requirements in Part 8.J.6 are applicable for sites undergoing exploration and 

construction, active mineral mining facilities, temporarily inactive mineral mining facilities, and 

sites undergoing reclamation. The requirements in Part 8.J.6 are not applicable to inactive 

mineral mining facilities.

8.J.6.1 Nature of Industrial Activities. (See also Part 5.2.2) Document in your SWPPP the mining 

and associated activities that can potentially affect the stormwater discharges 

covered by this permit, including a general description of the location of the site 

relative to major transportation routes and communities. 

8.J.6.2 Site Map. (See also Part 5.2.2) Document in your SWPPP the locations of the following 

(as appropriate): mining or milling site boundaries; access and haul roads; outline of the 

drainage areas of each stormwater outfall within the facility with indications of the 

types of discharges from the drainage areas; location(s) of all permitted discharges 

covered under an individual NPDES permit, outdoor equipment storage, fueling, and 

maintenance areas; materials handling areas; outdoor manufacturing, outdoor 

storage, and material disposal areas; outdoor chemicals and explosives storage areas; 

overburden, materials, soils, or waste storage areas; location of mine drainage 

dewatering or other process water; heap leach pads; off-site points of discharge for 

mine dewatering and process water; surface waters; boundary of tributary areas that 

are subject to effluent limitations guidelines; and location(s) of reclaimed areas.

8.J.6.3 Potential Pollutant Sources. (See also Part 5.2.3) For each area of the mine or mill site 

where stormwater discharges associated with industrial activities occur, document in 

your SWPPP the types of pollutants (e.g., heavy metals, sediment) likely to be present in 

significant amounts. For example, phosphate mining facilities will likely need to 

document pollutants such as selenium, which can be present in significant amounts in 

their discharges. Consider these factors: the mineralogy of the waste rock (e.g., acid 

forming); toxicity and quantity of chemicals used, produced, or discharged; the 

likelihood of contact with stormwater; vegetation of site (if any); and history of 

significant leaks or spills of toxic or hazardous pollutants. Also include a summary of any 

existing waste rock or overburden characterization data and test results for potential 

generation of acid rock drainage.

8.J.6.4 Stormwater Controls. To the extent that you use any of the control measures in Part 

8.J.5.2, document them in your SWPPP pursuant to Part 5.2.4. If control measures are 

implemented or planned but are not listed here (e.g., substituting a less toxic chemical 

for a more toxic one), include descriptions of them in your SWPPP.

8.J.6.4 Employee Training. All employee training(s) conducted in accordance with Part 8.J.5.1 

must be documented with the SWPPP.

8.J.6.5 Certification of Permit Coverage for Commingled Non-Stormwater Discharges. If you 

determine that you are able to certify, consistent with Part 8.J.5.3, that a particular 

discharge composed of commingled stormwater and non-stormwater is covered under 

a separate NPDES permit, and that permit subjects the non-stormwater portion to 

effluent limitations prior to any commingling, you must retain such certification with your 

SWPPP. This certification must identify the non-stormwater discharges, the applicable 

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NPDES permit(s), the effluent limitations placed on the non-stormwater discharge by the 

permit(s), and the points at which the limitations are applied.

8.J.7 Additional Inspection Requirements.

8.J.7.1 Inspections of Active Mining-Related Areas (See also Part 3). Except for areas of the site 

subject to clearing, grading, and/or excavation activities conducted as part of the 

exploration and construction phase, which are subject to Part 8.J.4.4, perform inspections

at least quarterly unless adverse weather conditions make the site inaccessible. Sites 

which discharge to waters which are designated as Tier 2 or 2.5 or waters which are 

impaired for sediment or nitrogen must be inspected monthly, unless subject to 8.J.4.3. 

See Part 8.J.8.1 for inspection requirements for inactive and unstaffed sites. (See also Part 

3.1.1 and 8.J.4.4.)

8.J.8 Sector-Specific Benchmarks

Table 8.J-1 identifies benchmarks that apply to the specific subsectors of Sector J. These 

benchmarks apply to both your primary industrial activity and any co-located industrial 

activities.

Table 8.J-1. 

Subsector

(You may be subject to requirements for 

more than one sector/subsector)

Parameter

Benchmark 

Monitoring 

Concentration

Subsector J1. Sand and Gravel Mining (SIC 

1442, 1446) 

Nitrate plus Nitrite Nitrogen 0.68 mg/L

Total Suspended Solids (TSS) 100 mg/L

Subsector J2. Dimension and Crushed Stone 

and Nonmetallic Minerals (except fuels) (SIC 

1411, 1422-1429, 1481, 1499) 

Total Suspended Solids (TSS) 100 mg/L

8.J.8.1 Inactive and Unstaffed Sites – Conditional Exemption from No Exposure Requirement for 

Routine Inspections, Quarterly Visual Assessments, and Benchmark Monitoring. As a 

Sector J facility, if you are seeking to exercise a waiver from either the routine 

inspection, quarterly visual assessment or the benchmark monitoring requirements for 

inactive and unstaffed sites (including temporarily inactive sites), you are conditionally 

exempt from the requirement to certify that “there are no industrial materials or 

activities exposed to stormwater” in Parts 3.1.1, 3.2.3 and 6.2.1.3, respectively. This

exemption is conditioned on the following:

• If circumstances change and your facility becomes active and/or staffed, this 

exception no longer applies and you must immediately begin complying with the 

applicable benchmark monitoring requirements as if you were in your first year of 

permit coverage, and the quarterly visual assessment requirements; and

• EPA retains the authority to revoke this exemption and/or the monitoring waiver 

where it is determined that the discharge causes, has a reasonable potential to

cause, or contributes to an instream excursion above an applicable water quality 

standard, including designated uses.

Subject to the two conditions above, if your facility is inactive and unstaffed, you are 

waived from the requirement to conduct quarterly visual assessments and routine 

facility inspections. You must still do an annual site inspection in accordance with Part

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3.1. You are encouraged to inspect your site more frequently where you have reason 

to believe that severe weather or natural disasters may have damaged control 

measures or increased discharges.

8.J.9 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1 of the 

permit)

Table 8.J-2 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 wastestreams that may be 

covered under this permit.

Table 8.J-2 

Industrial Activity Parameter Effluent Limit1 

Mine dewatering discharges at crushed stone 

mining facilities (SIC 1422 - 1429)

pH 6.0 - 9.0

Mine dewatering discharges at construction 

sand and gravel mining facilities (SIC 1442)

pH 6.0 - 9.0

Mine dewatering discharges at industrial sand 

mining facilities (SIC 1446)

Total Suspended 

Solids (TSS)

25 mg/L, monthly avg.

45 mg/L, daily 

maximum

pH 6.0 - 9.0 1Monitor annually.

8.J.10 Termination of Permit Coverage

8.J.10.1 Termination of Permit Coverage for Sites Reclaimed After December 17, 1990. A site or 

a portion of a site that has been released from applicable state or federal reclamation 

requirements after December 17, 1990, is no longer required to maintain coverage 

under this permit. If the site or portion of a site reclaimed after December 17, 1990, was 

not subject to reclamation requirements, the site or portion of the site is no longer 

required to maintain coverage under this permit if the site or portion of the site has 

been reclaimed as defined in Part 8.J.3.5. 

8.J.10.2 Termination of Permit Coverage for Sites Reclaimed Before December 17, 1990. A site or 

portion of a site that was released from applicable state or federal reclamation 

requirements before December 17, 1990, or that was otherwise reclaimed before 

December 17, 1990, is no longer required to maintain coverage under this permit if the 

site or portion of the site has been reclaimed. A site or portion of a site is considered to 

have been reclaimed if: (1) stormwater runoff that comes into contact with raw 

materials, intermediate byproducts, finished products, and waste products does not 

have the potential to cause or contribute to violations of state water quality standards, 

(2) soil disturbing activities related to mining at the sites or portion of the site have been 

completed, (3) the site or portion of the site has been stabilized to minimize soil erosion, 

and (4) as appropriate depending on location, size, and the potential to contribute 

pollutants to stormwater discharges, the site or portion of the site has been 

revegetated, will be amenable to natural revegetation, or will be left in a condition 

consistent with the post-mining land use.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart K – Sector K – Hazardous Waste Treatment, Storage, or Disposal Facilities.

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.K.1 Covered Stormwater Discharges.

The requirements in Subpart K apply to stormwater discharges associated with industrial 

activity from Hazardous Waste Treatment, Storage, or Disposal facilities (TSDFs) as identified by 

the Activity Code specified under Sector K in Table D-1 of Appendix D of the permit.

8.K.2 Industrial Activities Covered by Sector K.

This permit authorizes stormwater discharges associated with industrial activity from 

facilities that treat, store, or dispose of hazardous wastes and that are operating under interim 

status or a permit under subtitle C of RCRA.

Disposal facilities that have been properly closed and capped, and have no significant 

materials exposed to stormwater, are considered inactive and do not require permits.

8.K.3 Limitations on Coverage.

8.K.3.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) The following are not 

authorized by this permit: leachate, gas collection condensate, drained free liquids, 

contaminated ground water, laboratory-derived wastewater, and contact washwater 

from washing truck and railcar exteriors and surface areas that have come in direct 

contact with solid waste at the landfill facility.

8.K.3.2 Limitations on Coverage for Facilities Providing Commercial TSDF Services. For facilities 

located in Region 6 (see Appendix C) coverage is limited to hazardous waste TSDFs that 

are self-generating (including occasionally accepting wastes from community household 

hazardous waste collection events as public service), handle only residential wastes, 

and/or only store hazardous wastes and do not treat or dispose of them. Coverage 

under this permit is not available to commercial waste disposal and treatment facilities 

located in Region 6 that dispose and treat on a commercial basis any produced 

hazardous wastes (i.e., not their own) as a service to commercial or industrial generators.

8.K.4 Definitions.

8.K.4.1 Contaminated stormwater - stormwater that comes into direct contact with landfill 

wastes, the waste handling and treatment areas, or landfill wastewater as defined in 

Part 8.K.4.4. Some specific areas of a landfill that may produce contaminated 

stormwater include (but are not limited to) the open face of an active landfill with 

exposed waste (no cover added); the areas around wastewater treatment operations; 

trucks, equipment, or machinery that has been in direct contact with the waste; and 

waste dumping areas.

8.K.4.2 Drained free liquids - aqueous wastes drained from waste containers (e.g., drums) prior

to landfilling.

8.K.4.3 Landfill - an area of land or an excavation in which wastes are placed for permanent 

disposal, but that is not a land application or land treatment unit, surface 

impoundment, underground injection well, waste pile, salt dome formation, salt bed 

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formation, underground mine, or cave as these terms are defined in 40 CFR 257.2, 

258.2, and 260.10. 

8.K.4.4 Landfill wastewater - as defined in 40 CFR Part 445 (Landfills Point Source Category), all 

wastewater associated with, or produced by, landfilling activities except for sanitary 

wastewater, non-contaminated stormwater, contaminated groundwater, and 

wastewater from recovery pumping wells. Landfill wastewater includes, but is not 

limited to, leachate, gas collection condensate, drained free liquids, laboratory 

derived wastewater, contaminated stormwater, and contact washwater from washing 

truck, equipment, and railcar exteriors and surface areas that have come in direct 

contact with solid waste at the landfill facility.

8.K.4.5 Leachate - liquid that has passed through or emerged from solid waste and contains 

soluble, suspended, or miscible materials removed from such waste.

8.K.4.6 Non-contaminated stormwater - stormwater that does not come into direct contact 

with landfill wastes, the waste handling and treatment areas, or landfill wastewater as 

defined in Part 8.K.4.4. Non-contaminated stormwater includes stormwater that flows 

off the cap, cover, intermediate cover, daily cover, and/or final cover of the landfill.

8.K.5 Sector-Specific Benchmarks

Table 8.K-1 identifies benchmarks that apply to the specific subsectors of Sector K. These 

benchmarks apply to both your primary industrial activity and any co-located industrial 

activities.

Table 8.K-1. 

Subsector

(You may be subject to requirements 

for more than one sector/subsector)

Parameter

Benchmark 

Monitoring 

Concentration

Subsector K1. ALL - Industrial Activity 

Code “HZ” (Note: permit coverage 

limited in some states). Benchmarks 

only applicable to discharges not 

subject to effluent limitations in 40 CFR 

Part 445 Subpart A (see below). 

Ammonia 2.14 mg/L

Total Magnesium 0.064 mg/L

Chemical Oxygen Demand 

(COD)

120 mg/L

Total Arsenic 0.15 mg/L

Total Cadmium (freshwater)2 

Total Cadmium (saltwater)1

Hardness 

Dependent

0.04 mg/L

Total Cyanide 0.022 mg/ L

Total Lead (freshwater)2 

Total Lead (saltwater)1

Hardness 

Dependent

0.21 mg/L

Total Mercury 0.0014 mg/ L

Total Selenium 0.005 mg/L

Total Silver (freshwater)2 

Total Silver (saltwater)1

Hardness 

Dependent

0.09 mg/L 1Saltwater 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 6.2.1.1, to identify the applicable ‘hardness 

range’ for determining their benchmark value applicable to their facility. Hardness Dependent Benchmarks follow in the 

table below:

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Freshwater Hardness 

Range

Cadmium

(mg/L)

Lead

(mg/L)

Silver

(mg/L)

0-24.99 mg/L 0.0005 0.014 0.0007

25-49.99 mg/L 0.0008 0.023 0.0007

50-74.99 mg/L 0.0013 0.045 0.0017

75-99.99 mg/L 0.0018 0.069 0.0030

100-124.99 mg/L 0.0023 0.095 0.0046

125-149.99 mg/L 0.0029 0.122 0.0065

150-174.99 mg/L 0.0034 0.151 0.0087

175-199.99 mg/L 0.0039 0.182 0.0112

200-224.99 mg/L 0.0045 0.213 0.0138

225-249.99 mg/L 0.0050 0.246 0.0168

250+ mg/L 0.0053 0.262 0.0183

8.K.6 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1 of the 

permit.)

Table 8.K-2 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 wastestreams that may be 

covered under this permit.

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Table 8.K-21

Industrial Activity Parameter Effluent Limit

Discharges from hazardous 

waste landfills subject to 

effluent limitations in 40 

CFR Part 445 Subpart A 

(see footnote).

Biochemical Oxygen 

Demand (BOD5)

220 mg/L, daily maximum

56 mg/L, monthly avg. maximum

Total Suspended 

Solids (TSS)

88 mg/L, daily maximum

27 mg/L, monthly avg. maximum

Ammonia 10 mg/L, daily maximum

4.9 mg/L, monthly avg. maximum

Alpha Terpineol 0.042 mg/L, daily maximum

0.019 mg/L, monthly avg. maximum

Aniline 0.024 mg/L, daily maximum

0.015 mg/L, monthly avg. maximum

Benzoic Acid 0.119 mg/L, daily maximum

0.073 mg/L, monthly avg. maximum

Naphthalene 0.059 mg/L, daily maximum

0.022 mg/L, monthly avg. maximum

p-Cresol 0.024 mg/L, daily maximum

0.015 mg/L, monthly avg. maximum

Phenol 0.048 mg/L, daily maximum

0.029 mg/L, monthly avg. maximum

Pyridine 0.072 mg/L, daily maximum

0.025 mg/L, monthly avg. maximum

Total Arsenic 1.1 mg/L, daily maximum

0.54 mg/L, monthly avg. maximum

Total Chromium 1.1 mg/L, daily maximum

0.46 mg/L, monthly avg. maximum

Total Zinc 0.535 mg/L, daily maximum

0.296 mg/L, monthly avg. maximum

pH Within the range of 6-9 standard pH units 

(s.u.) 1 Monitor annually. As set forth at 40 CFR Part 445 Subpart A, these numeric limitations apply to contaminated 

stormwater discharges from hazardous waste landfills subject to the provisions of RCRA Subtitle C at 40 CFR Parts 264 

(Subpart N) and 265 (Subpart N) except for any of the following facilities:

(a) landfills operated in conjunction with other industrial or commercial operations when the landfill receives only 

wastes generated by the industrial or commercial operation directly associated with the landfill;

(b) landfills operated in conjunction with other industrial or commercial operations when the landfill receives wastes 

generated by the industrial or commercial operation directly associated with the landfill and also receives other 

wastes, provided that the other wastes received for disposal are generated by a facility that is subject to the 

same provisions in 40 CFR Subchapter N as the industrial or commercial operation or that the other wastes 

received are of similar nature to the wastes generated by the industrial or commercial operation;

(c) landfills operated in conjunction with Centralized Waste Treatment (CWT) facilities subject to 40 CFR Part 437, so 

long as the CWT facility commingles the landfill wastewater with other non-landfill wastewater for discharge. A 

landfill directly associated with a CWT facility is subject to this part if the CWT facility discharges landfill wastewater 

separately from other CWT wastewater or commingles the wastewater from its landfill only with wastewater from 

other landfills; or

(d) landfills operated in conjunction with other industrial or commercial operations when the landfill receives wastes 

from public service activities, so long as the company owning the landfill does not receive a fee or other 

remuneration for the disposal service.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart L – Sector L – Landfills, Land Application Sites, and Open Dumps.

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.L.1 Covered Stormwater Discharges.

The requirements in Subpart L apply to stormwater discharges associated with industrial 

activity from Landfills and Land Application Sites as identified by the Activity Code specified 

under Sector L in Table D-1 of Appendix D of the permit.

8.L.2 Industrial Activities Covered by Sector L.

This permit may authorize stormwater discharges for Sector L facilities associated with 

waste disposal at landfills, land application sites that receive or have received industrial waste, 

including sites subject to regulation under Subtitle D of RCRA. This permit does not cover 

discharges from landfills that receive only municipal wastes.

8.L.3 Limitations on Coverage.

8.L.3.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) The following discharges 

are not authorized by this permit: leachate, gas collection condensate, drained free 

liquids, contaminated ground water, laboratory wastewater, and contact washwater 

from washing truck and railcar exteriors and surface areas that have come in direct 

contact with solid waste at the landfill facility. Discharges from open dumps as defined 

under RCRA are also not authorized under this permit.

8.L.4 Definitions.

8.L.4.1 Contaminated stormwater - stormwater that comes into direct contact with landfill 

wastes, the waste handling and treatment areas, or landfill wastewater. Some areas of 

a landfill that may produce contaminated stormwater include (but are not limited to) 

the open face of an active landfill with exposed waste (no cover added); the areas 

around wastewater treatment operations; trucks, equipment, or machinery that has 

been in direct contact with the waste; and waste dumping areas.

8.L.4.2 Drained free liquids - aqueous wastes drained from waste containers (e.g., drums) prior 

to landfilling.

8.L.4.3 Landfill wastewater - as defined in 40 CFR Part 445 (Landfills Point Source Category) all 

wastewater associated with, or produced by, landfilling activities except for sanitary 

wastewater, non-contaminated stormwater, contaminated groundwater, and 

wastewater from recovery pumping wells. Landfill process wastewater includes, but is 

not limited to, leachate; gas collection condensate; drained free liquids; laboratoryderived wastewater; contaminated stormwater; and contact washwater from washing 

truck, equipment, and railcar exteriors and surface areas that have come in direct 

contact with solid waste at the landfill facility.

8.L.4.4 Leachate - liquid that has passed through or emerged from solid waste and contains 

soluble, suspended, or miscible materials removed from such waste.

8.L.4.5 Non-contaminated stormwater - stormwater that does not come into direct contact 

with landfill wastes, the waste handling and treatment areas, or landfill wastewater. 

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Non-contaminated stormwater includes stormwater that flows off the cap, cover,

intermediate cover, daily cover, and/or final cover of the landfill.

8.L.5 Additional Technology-Based Effluent Limits.

8.L.5.1 Preventive Maintenance Program. (See also Part 2.1.2.3) As part of your preventive 

maintenance program, maintain the following: all elements of leachate collection and 

treatment systems, to prevent commingling of leachate with stormwater; the integrity 

and effectiveness of any intermediate or final cover (including repairing the cover as 

necessary), to minimize the effects of settlement, sinking, and erosion.

8.L.5.2 Erosion and Sedimentation Control. (See also Part 2.1.2.5) Provide temporary 

stabilization (e.g., temporary seeding, mulching, and placing geotextiles on the 

inactive portions of stockpiles) for the following: materials stockpiled for daily, 

intermediate, and final cover; inactive areas of the landfill or open dump; landfills or 

open dump areas that have gotten final covers but where vegetation has yet to 

establish itself; and land application sites where waste application has been 

completed but final vegetation has not yet been established.

8.L.6 Additional SWPPP Requirements.

8.L.5.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP where any of 

the following may be exposed to precipitation or surface runoff: active and closed 

landfill cells or trenches, active and closed land application areas, locations where 

open dumping is occurring or has occurred, locations of any known leachate springs or 

other areas where uncontrolled leachate may commingle with runoff, and leachate 

collection and handling systems.

8.L.5.2 Summary of Potential Pollutant Sources. (See also Part 5.2.3) Document in your SWPPP 

the following sources and activities that have potential pollutants associated with 

them: fertilizer, herbicide, and pesticide application; earth and soil moving; waste 

hauling and loading or unloading; outdoor storage of significant materials, including 

daily, interim, and final cover material stockpiles as well as temporary waste storage 

areas; exposure of active and inactive landfill and land application areas; uncontrolled 

leachate flows; and failure or leaks from leachate collection and treatment systems.

8.L.7 Additional Inspection Requirements. (See also Part 3) 

8.L.7.1 Inspections of Active Sites. Except in arid and semi-arid climates, inspect operating 

landfills, open dumps, and land application sites at least once every 7 days. Focus on 

areas of landfills that have not yet been finally stabilized; active land application areas, 

areas used for storage of material and wastes that are exposed to precipitation, 

stabilization, and structural control measures; leachate collection and treatment 

systems; and locations where equipment and waste trucks enter and exit the site. 

Ensure that sediment and erosion control measures are operating properly. For 

stabilized sites and areas where land application has been completed, or where the 

climate is arid or semi-arid, conduct inspections at least once every month.

8.L.7.2 Inspections of Inactive Sites. Inspect inactive landfills, open dumps, and land 

application sites at least quarterly. Qualified personnel must inspect landfill (or open 

dump) stabilization and structural erosion control measures, leachate collection and 

treatment systems, and all closed land application areas.

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8.L.8 Additional Post-Authorization Documentation Requirements.

8.L.8.1 Recordkeeping and Internal Reporting. Keep records with your SWPPP of the types of 

wastes disposed of in each cell or trench of a landfill or open dump. For land 

application sites, track the types and quantities of wastes applied in specific areas.

8.L.9 Sector-Specific Benchmarks

Table 8.L-1 identifies benchmarks that apply to the specific subsectors of Sector L. These 

benchmarks apply to both your primary industrial activity and any co-located industrial 

activities.

Table 8.L-1. 

Subsector

(You may be subject to requirements for more than one 

sector/subsector)

Parameter

Benchmark 

Monitoring 

Concentration1

Subsector L1. All Landfill, Land Application Sites and Open 

Dumps (Industrial Activity Code “LF”)

Total 

Suspended 

Solids (TSS)

100 mg/L

Subsector L2. All Landfill, Land Application Sites and Open 

Dumps, except Municipal Solid Waste Landfill (MSWLF) Areas 

Closed in Accordance with 40 CFR 258.60 (Industrial Activity

Code “LF”)

Total Iron 1.0 mg/L

1Benchmark monitoring required only for discharges not subject to effluent limitations in 40 CFR Part 445 Subpart B (see 

Table L-2 above).

8.L.10. Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1 of the 

permit.)

Table 8.L-2 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 wastestreams that may be 

covered under this permit.

Table 8.L-21

Industrial Activity Parameter Effluent Limit

Discharges from nonhazardous waste landfills 

subject to effluent 

limitations in 40 CFR Part 

445 Subpart B. 

Biochemical Oxygen Demand 

(BOD5)

140 mg/L, daily maximum

37 mg/L, monthly avg. maximum

Total Suspended Solids (TSS) 88 mg/L, daily maximum

27 mg/L, monthly avg. maximum

Ammonia 10 mg/L, daily maximum

4.9 mg/L, monthly avg. maximum

Alpha Terpineol 0.033 mg/L, daily maximum

0.016 mg/L monthly avg. maximum

Benzoic Acid 0.12 mg/L, daily maximum

0.071 mg/L, monthly avg. 

maximum

p-Cresol 0.025 mg/L, daily maximum

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Table 8.L-21

Industrial Activity Parameter Effluent Limit

0.014 mg/L, monthly avg. 

maximum

Phenol 0.026 mg/L, daily maximum

0.015 mg/L, monthly avg. 

maximum

Total Zinc 0.20 mg/L, daily maximum

0.11 mg/L, monthly avg. maximum

pH Within the range of 6-9 standard 

pH units (s.u.) 1 Monitor annually. As set forth at 40 CFR Part 445 Subpart B, these numeric limitations apply to contaminated stormwater 

discharges from MSWLFs that have not been closed in accordance with 40 CFR 258.60, and to contaminated stormwater 

discharges from those landfills that are subject to the provisions of 40 CFR Part 257 except for discharges from any of the 

following facilities:

(a) landfills operated in conjunction with other industrial or commercial operations, when the landfill receives only 

wastes generated by the industrial or commercial operation directly associated with the landfill;

(b) landfills operated in conjunction with other industrial or commercial operations, when the landfill receives wastes 

generated by the industrial or commercial operation directly associated with the landfill and also receives other 

wastes, provided that the other wastes received for disposal are generated by a facility that is subject to the 

same provisions in 40 CFR Subchapter N as the industrial or commercial operation, or that the other wastes 

received are of similar nature to the wastes generated by the industrial or commercial operation;

(c) landfills operated in conjunction with CWT facilities subject to 40 CFR Part 437, so long as the CWT facility 

commingles the landfill wastewater with other non-landfill wastewater for discharge. A landfill directly associated

with a CWT facility is subject to this part if the CWT facility discharges landfill wastewater separately from other 

CWT wastewater or commingles the wastewater from its landfill only with wastewater from other landfills; or

(d) landfills operated in conjunction with other industrial or commercial operations when the landfill receives wastes 

from public service activities, so long as the company owning the landfill does not receive a fee or other 

remuneration for the disposal service.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart M – Sector M – Automobile Salvage Yards.

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.M.1 Covered Stormwater Discharges.

The requirements in Subpart M apply to stormwater discharges associated with industrial 

activity from Automobile Salvage Yards as identified by the SIC Code specified under Sector M 

in Table D-1 of Appendix D of this permit.

8.M.2 Additional Technology-Based Effluent Limits.

8.M.2.1 Spill and Leak Prevention Procedures. (See also Part 2.1.2.4) Drain vehicles intended to 

be dismantled of all fluids upon arrival at the site (or as soon thereafter as practicable), 

or employ some other equivalent means to prevent spills and leaks.

8.M.2.2 Employee Training. (See also Part 2.1.2.8) If applicable to your facility, address the 

following areas (at a minimum) in your employee training program: proper handling 

(collection, storage, and disposal) of oil, used mineral spirits, anti-freeze, mercury 

switches, and solvents.

8.M.2.3 Management of Runoff. (See also Part 2.1.2.6) Implement appropriate management 

practices, such as the following: berms or drainage ditches on the property line (to help 

prevent run-on from neighboring properties); berms for uncovered outdoor storage of 

oily parts, engine blocks, and above-ground liquid storage; installation of detention 

ponds; and installation of filtering devices and oil and water separators.

8.M.3 Additional SWPPP Requirements.

8.M.3.1 Drainage Area Site Map. (See also Part 5.2.2) Identify locations used for dismantling, 

storage, and maintenance of used motor vehicle parts. Also identify where any of the 

following may be exposed to precipitation or surface runoff: dismantling areas, parts 

(e.g., engine blocks, tires, hub caps, batteries, hoods, mufflers) storage areas, and liquid 

storage tanks and drums for fuel and other fluids.

8.M.3.2 Potential Pollutant Sources. (See also Part 5.2.3) Assess the potential for the following to 

contribute pollutants to stormwater discharges: vehicle storage areas, dismantling 

areas, parts storage areas (e.g., engine blocks, tires, hub caps, batteries, hoods, 

mufflers), and fueling stations.

8.M.4 Additional Inspection Requirements. (See also Part 3.1) Immediately (or as soon 

thereafter as practicable) inspect vehicles arriving at the site for leaks. Inspect quarterly 

for signs of leakage all equipment containing oily parts, hydraulic fluids, any other types 

of fluids, or mercury switches. Also, inspect quarterly for signs of leakage all vessels and 

areas where hazardous materials and general automotive fluids are stored, including, 

but not limited to, mercury switches, brake fluid, transmission fluid, radiator water, and 

antifreeze.

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8.M.5 Sector-Specific Benchmarks.

Table 8.M-1 identifies benchmarks that apply to Sector M. These benchmarks apply to 

both your primary industrial activity and any co-located industrial activities.

Table 8.M-1.

Subsector

(You may be subject to requirements 

for more than one sector/subsector)

Parameter

Benchmark 

Monitoring 

Concentration

Subsector M1. Automobile Salvage 

Yards (SIC 5015) 

Total Suspended Solids (TSS) 100 mg/L

Total Aluminum 0.75 mg/L

Total Iron 1.0 mg/L

Total Lead (freshwater)2 

Total Lead (saltwater)1

Hardness Dependent

0.21 mg/L 1Saltwater 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 6.2.1.1, 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

(mg/L)

0-24.99 mg/L 0.014

25-49.99 mg/L 0.023

50-74.99 mg/L 0.045

75-99.99 mg/L 0.069

100-124.99 mg/L 0.095

125-149.99 mg/L 0.122

150-174.99 mg/L 0.151

175-199.99 mg/L 0.182

200-224.99 mg/L 0.213

225-249.99 mg/L 0.246

250+ mg/L 0.262

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart N – Sector N – Scrap Recycling and Waste Recycling Facilities.

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.N.1 Covered Stormwater Discharges.

The requirements in Subpart N apply to stormwater discharges associated with industrial 

activity from Scrap Recycling and Waste Recycling facilities as identified by the SIC Code 

specified under Sector N in Table D-1 of Appendix D of the permit.

8.N.2 Limitation on Coverage.

Separate permit requirements have been established for recycling facilities that receive, 

process, and do wholesale distribution of only source-separated recyclable materials primarily 

from non-industrial and residential sources (i.e., common consumer products including paper, 

newspaper, glass, cardboard, plastic containers, and aluminum and tin cans). This includes 

recycling facilities commonly referred to as material recovery facilities (MRF). See Part 8.N.3.3.

8.N.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) Non-stormwater 

discharges from turnings containment areas are not covered by this permit (see also 

Part 8.N.3.2.3). Discharges from containment areas in the absence of a storm event are 

prohibited unless covered by a separate NPDES permit. 

8.N.3 Additional Technology-Based Effluent Limits.

8.N.3.1 Scrap and Waste Recycling Facilities (Non-Source Separated, Nonliquid Recyclable 

Materials). Requirements for facilities that receive, process, and do wholesale 

distribution of nonliquid recyclable wastes (e.g., ferrous and nonferrous metals, plastics, 

glass, cardboard, and paper). These facilities may receive both nonrecyclable and 

recyclable materials. This section is not intended for those facilities that accept 

recyclables only from primarily non-industrial and residential sources.

8.N.3.1.1 Inbound Recyclable and Waste Material Control Program. Minimize the 

chance of accepting materials that could be significant sources of pollutants 

by conducting inspections of inbound recyclables and waste materials. 

Following are some control measure options: (a) provide information and 

education to suppliers of scrap and recyclable waste materials on draining 

and properly disposing of residual fluids (e.g., from vehicles and equipment 

engines, radiators and transmissions, oil filled transformers, and individual 

containers or drums) and removal of mercury switches from vehicles before 

delivery to your facility; (b) establish procedures to minimize the potential of 

any residual fluids from coming into contact with precipitation or runoff; (c) 

establish procedures for accepting scrap lead-acid batteries (additional 

requirements for the handling, storage, and disposal or recycling of batteries 

are contained in the scrap lead-acid battery program provisions in Part 

8.N.3.2.6); (d) provide training targeted for those personnel engaged in the 

inspection and acceptance of inbound recyclable materials; and (e) 

establish procedures to ensure that liquid wastes, including used oil, are stored 

in materially compatible and non-leaking containers and are disposed of or 

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recycled in accordance with the Resource Conservation and Recovery Act 

(RCRA).

8.N.3.1.2 Scrap and Waste Material Stockpiles and Storage (Outdoor). Minimize 

contact of stormwater runoff with stockpiled materials, processed materials, 

and nonrecyclable wastes. Following are some control measure options: (a) 

permanent or semi-permanent covers; (b) sediment traps, vegetated swales 

and strips, catch basin filters, and sand filters to facilitate settling or filtering of 

pollutants; (c) dikes, berms, containment trenches, culverts, and surface 

grading to divert runoff from storage areas; (d) silt fencing; and (e) oil and 

water separators, sumps, and dry absorbents for areas where potential 

sources of residual fluids are stockpiled (e.g., automobile engine storage 

areas).

8.N.3.1.3 Stockpiling of Turnings Exposed to Cutting Fluids (Outdoor Storage). Minimize 

contact of surface runoff with residual cutting fluids by: (a) storing all turnings 

exposed to cutting fluids under some form of permanent or semi-permanent 

cover, or (b) establishing dedicated containment areas for all turnings that 

have been exposed to cutting fluids. Any containment areas must be 

constructed of concrete, asphalt, or other equivalent types of impermeable 

material and include a barrier (e.g., berms, curbing, elevated pads) to 

prevent contact with stormwater run-on. Stormwater runoff from these areas 

can be discharged, provided that any runoff is first collected and treated by 

an oil and water separator or its equivalent. You must regularly maintain the 

oil and water separator (or its equivalent) and properly dispose of or recycle 

collected residual fluids.

8.N.3.1.4 Scrap and Waste Material Stockpiles and Storage (Covered or Indoor 

Storage). Minimize contact of residual liquids and particulate matter from 

materials stored indoors or under cover with surface runoff. Following are 

some control measure options: (a) good housekeeping measures, including 

the use of dry absorbents or wet vacuuming to contain, dispose of, or recycle 

residual liquids originating from recyclable containers, or mercury spill kits for 

spills from storage of mercury switches; (b) not allowing washwater from 

tipping floors or other processing areas to discharge to the storm sewer 

system; and (c) disconnecting or sealing off all floor drains connected to the 

storm sewer system.

8.N.3.1.5 Scrap and Recyclable Waste Processing Areas. Minimize surface runoff from 

coming in contact with scrap processing equipment. Pay attention to 

operations that generate visible amounts of particulate residue (e.g., 

shredding) to minimize the contact of accumulated particulate matter and 

residual fluids with runoff (i.e., through good housekeeping, preventive 

maintenance, etc.). Following are some control measure options: (a) regularly 

inspect equipment for spills or leaks and malfunctioning, worn, or corroded 

parts or equipment; (b) establish a preventive maintenance program for 

processing equipment; (c) use dry-absorbents or other cleanup practices to 

collect and dispose of or recycle spilled or leaking fluids or use mercury spill 

kits for spills from storage of mercury switches; (d) on unattended hydraulic 

reservoirs over 150 gallons in capacity, install protection devices such as lowlevel alarms or equivalent devices, or secondary containment that can hold 

the entire volume of the reservoir; (e) containment or diversion structures such 

as dikes, berms, culverts, trenches, elevated concrete pads, and grading to 

Page 105 of 146
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minimize contact of stormwater runoff with outdoor processing equipment or 

stored materials; (f) oil and water separators or sumps; (g) permanent or semipermanent covers in processing areas where there are residual fluids and 

grease; (h) retention or detention ponds or basins; sediment traps, and 

vegetated swales or strips (for pollutant settling and filtration); (i) catch basin 

filters or sand filters.

8.N.3.1.6 Scrap Lead-Acid Battery Program. Properly handle, store, and dispose of 

scrap lead-acid batteries. Following are some control measure options (a) 

segregate scrap lead-acid batteries from other scrap materials; (b) properly 

handle, store, and dispose of cracked or broken batteries; (c) collect and 

dispose of leaking lead-acid battery fluid; (d) minimize or eliminate (if possible) 

exposure of scrap lead-acid batteries to precipitation or runoff; and (e) 

provide employee training for the management of scrap batteries.

8.N.3.1.7 Spill Prevention and Response Procedures. (See also Part 2.1.2.4)Install alarms 

and/or pump shutoff systems on outdoor equipment with hydraulic reservoirs 

exceeding 150 gallons in the event of a line break. Alternatively, a secondary 

containment system capable of holding the entire contents of the reservoir 

plus room for precipitation can be used. Use a mercury spill kit for any release 

of mercury from switches, anti-lock brake systems, and switch storage areas.

8.N.3.1.8 Supplier Notification Program. As appropriate, notify major suppliers which 

scrap materials will not be accepted at the facility or will be accepted only 

under certain conditions.

8.N.3.2 Waste Recycling Facilities (Liquid Recyclable Materials).

8.N.3.2.1 Waste Material Storage (Indoor). Minimize or eliminate contact between 

residual liquids from waste materials stored indoors and from surface runoff. 

The plan may refer to applicable portions of other existing plans, such as Spill 

Prevention, Control, and Countermeasure (SPCC) plans required under 40 

CFR Part 112. Following are some control measure options (a) procedures for 

material handling (including labeling and marking); (b) clean up spills and 

leaks with dry absorbent materials, a wet vacuum system; (c) appropriate 

containment structures (trenching, curbing, gutters, etc.); and (d) a drainage 

system, including appurtenances (e.g., pumps or ejectors, manually operated 

valves), to handle discharges from diked or bermed areas. Drainage should 

be discharged to an appropriate treatment facility or sanitary sewer system, 

or otherwise disposed of properly. These discharges may require coverage 

under a separate NPDES wastewater permit or industrial user permit under the 

pretreatment program.

8.N.3.2.2 Waste Material Storage (Outdoor). Minimize contact between stored residual 

liquids and precipitation or runoff. The plan may refer to applicable portions of 

other existing plans, such as SPCC plans required under 40 CFR Part 112. 

Discharges of precipitation from containment areas containing used oil must 

also be in accordance with applicable sections of 40 CFR Part 112. Following 

are some control measure options (a) appropriate containment structures 

(e.g., dikes, berms, curbing, pits) to store the volume of the largest tank, with 

sufficient extra capacity for precipitation; (b) drainage control and other 

diversionary structures; (c) corrosion protection and/or leak detection systems 

for storage tanks; and (d) dry-absorbent materials or a wet vacuum system to 

collect spills.

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8.N.3.2.3 Trucks and Rail Car Waste Transfer Areas. Minimize pollutants in discharges 

from truck and rail car loading and unloading areas. Include measures to 

clean up minor spills and leaks resulting from the transfer of liquid wastes. 

Following are two control measure options: (a) containment and diversionary 

structures to minimize contact with precipitation or runoff, and (b) dry cleanup methods, wet vacuuming, roof coverings, or runoff controls.

8.N.3.3 Recycling Facilities (Source-Separated Materials). The following identifies 

considerations for facilities that receive only source-separated recyclables, 

primarily from non-industrial and residential sources.

8.N.3.3.1 Inbound Recyclable Material Control. Minimize the chance of accepting 

nonrecyclables (e.g., hazardous materials) that could be a significant source 

of pollutants by conducting inspections of inbound materials. Following are 

some control measure options: (a) providing information and education 

measures to inform suppliers of recyclables about acceptable and nonacceptable materials, (b) training drivers responsible for pickup of recycled 

material, (c) clearly marking public drop-off containers regarding which 

materials can be accepted, (d) rejecting nonrecyclable wastes or household 

hazardous wastes at the source, and (e) establishing procedures for handling 

and disposal of nonrecyclable material.

8.N.3.3.2 Outdoor Storage. Minimize exposure of recyclables to precipitation and 

runoff. Use good housekeeping measures to prevent accumulation of 

particulate matter and fluids, particularly in high traffic areas. Following are 

some control measure options (a) provide totally enclosed drop-off containers 

for the public; (b) install a sump and pump with each container pit and treat 

or discharge collected fluids to a sanitary sewer system; (c) provide dikes and 

curbs for secondary containment (e.g., around bales of recyclable waste 

paper); (d) divert surface water runoff away from outside material storage 

areas; (e) provide covers over containment bins, dumpsters, and roll-off 

boxes; and (f) store the equivalent of one day’s volume of recyclable material 

indoors.

8.N.3.3.3 Indoor Storage and Material Processing. Minimize the release of pollutants 

from indoor storage and processing areas. Following are some control 

measure options (a) schedule routine good housekeeping measures for all 

storage and processing areas, (b) prohibit tipping floor washwater from 

draining to the storm sewer system, and (c) provide employee training on 

pollution prevention practices.

8.N.3.3.4 Vehicle and Equipment Maintenance. Following are some control measure 

options for areas where vehicle and equipment maintenance occur outdoors 

(a) prohibit vehicle and equipment washwater from discharging to the storm 

sewer system, (b) minimize or eliminate outdoor maintenance areas 

whenever possible, (c) establish spill prevention and clean-up procedures in 

fueling areas, (d) avoid topping off fuel tanks, (e) divert runoff from fueling 

areas, (f) store lubricants and hydraulic fluids indoors, and (g) provide 

employee training on proper handling and storage of hydraulic fluids and 

lubricants.

8.N.4 Additional SWPPP Requirements.

8.N.4.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP the locations of 

any of the following activities or sources that may be exposed to precipitation or 

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surface runoff: scrap and waste material storage, outdoor scrap and waste processing 

equipment; and containment areas for turnings exposed to cutting fluids.

8.N.4.2 Maintenance Schedules/Procedures for Collection, Handling, and Disposal or 

Recycling of Residual Fluids at Scrap and Waste Recycling Facilities. If you are subject 

to Part 8.N.3.1.3, your SWPPP must identify any applicable maintenance schedule and 

the procedures to collect, handle, and dispose of or recycle residual fluids.

8.N.5 Additional Inspection Requirements.

8.N.5.1 Inspections for Waste Recycling Facilities. The inspections must be performed quarterly, 

pursuant to Part 3.1, and include, at a minimum, all areas where waste is generated, 

received, stored, treated, or disposed of and that are exposed to either precipitation or 

stormwater runoff. 

8.N.6 Sector-Specific Benchmarks.

Table 8.N-1 identifies benchmarks that apply to Sector N. These benchmarks apply to 

both your primary industrial activity and any co-located industrial activities.

Table 8.N-1. 

Subsector

(You may be subject to requirements for 

more than one sector/subsector)

Parameter Benchmark Monitoring 

Concentration

Subsector N1. Scrap Recycling and 

Waste Recycling Facilities except those 

only receiving source-separate 

recyclable materials primarily from nonindustrial and residential sources (SIC 

5093) 

Chemical Oxygen 

Demand (COD)

120 mg/L

Total Suspended Solids 

(TSS)

100 mg/L

Total Recoverable 

Aluminum

0.75 mg/L

Total Copper (freshwater)2 

Total Copper (saltwater)1

Hardness Dependent

0.0048 mg/L 

Total Recoverable Iron 1.0 mg/L

Total Lead (freshwater)2 

Total Lead (saltwater)1

Hardness Dependent

0.21 mg/L

Total Zinc (freshwater)2 

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L 1Saltwater 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 6.2.1.1, to identify the applicable ‘hardness 

range’ for determining their benchmark value applicable to their facility. Hardness Dependent Benchmarks follow in the 

table below:

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Freshwater Hardness 

Range

Copper

(mg/L)

Lead

(mg/L)

Zinc

(mg/L)

0-24.99 mg/L 0.0038 0.014 0.04

25-49.99 mg/L 0.0056 0.023 0.05

50-74.99 mg/L 0.0090 0.045 0.08

75-99.99 mg/L 0.0123 0.069 0.11

100-124.99 mg/L 0.0156 0.095 0.13

125-149.99 mg/L 0.0189 0.122 0.16

150-174.99 mg/L 0.0221 0.151 0.18

175-199.99 mg/L 0.0253 0.182 0.20

200-224.99 mg/L 0.0285 0.213 0.23

225-249.99 mg/L 0.0316 0.246 0.25

250+ mg/L 0.0332 0.262 0.26

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart O – Sector O – Steam Electric Generating Facilities.

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.O.1 Covered Stormwater Discharges.

The requirements in Subpart O apply to stormwater discharges associated with industrial 

activity from Steam Electric Power Generating Facilities as identified by the Activity Code 

specified under Sector O in Table D-1 of Appendix D.

8.O.2 Industrial Activities Covered by Sector O.

This permit authorizes stormwater discharges from the following industrial activities at 

Sector O facilities:

8.O.2.1 steam electric power generation using coal, natural gas, oil, nuclear energy, etc., to 

produce a steam source, including coal handling areas (does not include geothermal 

power); 

8.O.2.2 coal pile runoff, including effluent limitations established by 40 CFR Part 423; and

8.O.2.3 dual fuel facilities that could employ a steam boiler.

8.O.3 Limitations on Coverage.

8.O.3.1 Prohibition of Non-Stormwater Discharges. Non-stormwater discharges subject to 

effluent limitations guidelines are not covered by this permit.

8.O.3.2 Prohibition of Stormwater Discharges. Stormwater discharges from the following are not 

covered by this permit:

8.O.3.2.1 ancillary facilities (e.g., fleet centers and substations) that are not contiguous 

to a stream electric power generating facility;

8.O.3.2.2 gas turbine facilities (providing the facility is not a dual-fuel facility that 

includes a steam boiler), and combined-cycle facilities where no 

supplemental fuel oil is burned (and the facility is not a dual-fuel facility that 

includes a steam boiler); and

8.O.3.2.3 cogeneration (combined heat and power) facilities utilizing a gas turbine.

8.O.4 Additional Technology-Based Effluent Limits. The following good housekeeping 

measures are required in addition to Part 2.1.2.2:

8.O.4.1 Fugitive Dust Emissions. Minimize fugitive dust emissions from coal handling areas. To 

minimize the tracking of coal dust offsite, implement appropriate procedures such as 

installing specially designed tires or washing vehicles in a designated area before they 

leave the site and controlling the wash water.

8.O.4.2 Delivery Vehicles. Minimize contamination of stormwater runoff from delivery vehicles 

arriving at the plant site. Implement appropriate procedures to inspect delivery vehicles 

arriving at the plant site and ensure overall integrity of the body or container and 

procedures to deal with leakage or spillage from vehicles or containers.

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8.O.4.3 Fuel Oil Unloading Areas. Minimize contamination of precipitation or surface runoff from 

fuel oil unloading areas. Use containment curbs in unloading areas where practicable. 

In addition, have personnel familiar with spill prevention and response procedures 

present during deliveries to ensure that any leaks or spills are immediately contained 

and cleaned up, and use spill and overflow protection devices (e.g., drip pans, drip 

diapers, or other containment devices placed beneath fuel oil connectors to contain 

potential spillage during deliveries or from leaks at the connectors).

8.O.4.4 Chemical Loading and Unloading. Minimize contamination of precipitation or surface 

runoff from chemical loading and unloading areas. Use containment curbs at 

chemical loading and unloading areas to contain spills, where practicable. In addition, 

have personnel familiar with spill prevention and response procedures present during 

deliveries to ensure that any leaks or spills are immediately contained and cleaned up, 

and, where practicable, load and unload in covered areas and store chemicals 

indoors.

8.O.4.5 Miscellaneous Loading and Unloading Areas. Minimize contamination of precipitation 

or surface runoff from loading and unloading areas. Cover the loading area; grade, 

curb, or berm around the loading area to divert run-on; locate the loading and 

unloading equipment and vehicles so that leaks are contained in existing containment 

and flow diversion systems; or use equivalent procedures to minimize the 

contamination of precipitation or surface runoff from loading and unloading areas. 

8.O.4.6 Liquid Storage Tanks. Minimize contamination of surface runoff from above-ground 

liquid storage tanks. Use protective guards around tanks, containment curbs, spill and 

overflow protection, dry cleanup methods, or equivalent measures.

8.O.4.7 Large Bulk Fuel Storage Tanks. Minimize contamination of surface runoff from large bulk 

fuel storage tanks. Use containment berms (or their equivalent). You must also comply 

with applicable State and Federal laws, including Spill Prevention, Control and 

Countermeasure (SPCC) Plan requirements.

8.O.4.8 Spill Reduction Measures. Minimize the potential for an oil or chemical spill, or 

reference the appropriate part of your SPCC plan. Visually inspect as part of your 

routine facility inspection the structural integrity of all above-ground tanks, pipelines, 

pumps, and related equipment that may be exposed to stormwater, and make any 

necessary repairs immediately.

8.O.4.9 Oil-Bearing Equipment in Switchyards. Minimize contamination of surface runoff from oilbearing equipment in switchyard areas. Use level grades and gravel surfaces to retard 

flows and limit the spread of spills, or collecting runoff in perimeter ditches.

8.O.4.10 Residue-Hauling Vehicles. Inspect all residue-hauling vehicles for proper covering over 

the load, adequate gate sealing, and overall integrity of the container body. Repair 

vehicles without load covering or adequate gate sealing, or with leaking containers or 

beds.

8.O.4.11 Ash Loading Areas. Reduce or control the tracking of ash and residue from ash loading 

areas. Clear the ash building floor and immediately adjacent roadways of spillage, 

debris, and excess water before departure of each loaded vehicle.

8.O.4.12 Areas Adjacent to Disposal Ponds or Landfills. Minimize contamination of surface runoff 

from areas adjacent to disposal ponds or landfills. Reduce ash residue that may be 

tracked on to access roads traveled by residue handling vehicles, and reduce ash 

residue on exit roads leading into and out of residue handling areas. 

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8.O.4.13 Landfills, Scrap yards, Surface Impoundments, Open Dumps, General Refuse Sites. 

Minimize the potential for contamination of runoff from these areas.

8.O.5 Additional SWPPP Requirements.

8.O.5.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP the locations of 

any of the following activities or sources that may be exposed to precipitation or 

surface runoff: storage tanks, scrap yards, and general refuse areas; short- and longterm storage of general materials (including but not limited to supplies, construction 

materials, paint equipment, oils, fuels, used and unused solvents, cleaning materials, 

paint, water treatment chemicals, fertilizer, and pesticides); landfills and construction 

sites; and stock pile areas (e.g., coal or limestone piles).

8.O.5.2 Documentation of Good Housekeeping Measures. You must document in your SWPPP 

the good housekeeping measures implemented to meet the effluent limits in Part 8.O.4.

8.O.6 Additional Inspection Requirements.

As part of your inspection, inspect the following areas monthly: coal handling areas, loading or 

unloading areas, switchyards, fueling areas, bulk storage areas, ash handling areas, 

areas adjacent to disposal ponds and landfills, maintenance areas, liquid storage 

tanks, and long term and short term material storage areas.

8.O.7 Sector-Specific Benchmarks

Table 8.O-1 identifies benchmarks that apply to Sector O. These benchmarks apply to 

both your primary industrial activity and any co-located industrial activities.

Table 8.O-1. 

Subsector

(You may be subject to requirements for more than one 

sector/subsector)

Parameter

Benchmark 

Monitoring 

Concentration

Subsector O1. Steam Electric Generating Facilities (Industrial 

Activity Code “SE”)

Total Iron 1.0 mg/L

8.O.8 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1 of the 

permit.)

Table 8.O-2 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 wastestreams that may be 

covered under this permit.

Table 8.O-21

Industrial Activity Parameter Effluent Limit

Discharges from coal storage piles at Steam 

Electric Generating Facilities

TSS 50 mg/l2

pH 6.0 min - 9.0 max

1 Monitor annually.

2 If your 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.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart P – Sector P – Land Transportation and Warehousing.

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.P.1 Covered Stormwater Discharges.

The requirements in Subpart P apply to stormwater discharges associated with industrial 

activity from Land Transportation and Warehousing facilities as identified by the SIC Codes 

specified under Sector P in Table D-1 of Appendix D of the permit.

8.P.2 Limitation on Coverage

8.P.2.1 Prohibited Discharges (see also Parts 1.1.4 and 8.P.3.1.4) This permit does not authorize 

the discharge of vehicle/equipment/surface washwater, including tank cleaning 

operations. Such discharges must be authorized under a separate NPDES permit, 

discharged to a sanitary sewer in accordance with applicable industrial pretreatment 

requirements, or recycled on-site.

8.P.3 Additional Technology-Based Effluent Limits.

8.P.3.1 Good Housekeeping Measures. (See also Part 2.1.2.2) In addition to the Good 

Housekeeping requirements in Part 2.1.2.2, you must do the following. Recommended 

control measures are discussed as indicated:

8.P.3.1.1 Vehicle and Equipment Storage Areas. Minimize the potential for stormwater 

exposure to leaky or leak-prone vehicles/equipment awaiting maintenance. 

Implement appropriate control measures, such as the following (or other 

equivalent measures): use of drip pans under vehicles/equipment, indoor 

storage of vehicles and equipment, installation of berms or dikes, use of 

absorbents, roofing or covering storage areas, and cleaning pavement 

surfaces to remove oil and grease. 

8.P.3.1.2 Fueling Areas. Minimize contamination of stormwater runoff from fueling areas. 

Implement appropriate control measures, such as the following (or other 

equivalent measures): Covering the fueling area; using spill/overflow 

protection and cleanup equipment; minimizing stormwater run-on/runoff to 

the fueling area; using dry cleanup methods; and treating and/or recycling 

collected stormwater runoff. 

8.P.3.1.3 Material Storage Areas. Maintain all material storage vessels (e.g., for used 

oil/oil filters, spent solvents, paint wastes, hydraulic fluids) to prevent 

contamination of stormwater and plainly label them (e.g., “Used Oil,” “Spent

Solvents,” etc.). Consider the following (or other equivalent measures): storing 

the materials indoors; installing berms/dikes around the areas; minimizing 

runoff of stormwater to the areas; using dry cleanup methods; and treating 

and/or recycling collected stormwater runoff. 

8.P.3.1.4 Vehicle and Equipment Cleaning Areas. Minimize contamination of 

stormwater runoff from all areas used for vehicle/equipment cleaning. 

Implement appropriate control measures, such as the following (or other 

equivalent measures): performing all cleaning operations indoors; covering 

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the cleaning operation, ensuring that all washwater drains to a proper 

collection system (i.e., not the stormwater drainage system); treating and/or 

recycling collected washwater, or other equivalent measures.

8.P.3.1.5 Vehicle and Equipment Maintenance Areas. Minimize contamination of 

stormwater runoff from all areas used for vehicle/equipment maintenance. 

Implement appropriate control measures, such as the following (or other 

equivalent measures): performing maintenance activities indoors; using drip 

pans; keeping an organized inventory of materials used in the shop; draining 

all parts of fluid prior to disposal; prohibiting wet clean up practices if these 

practices would result in the discharge of pollutants to stormwater drainage 

systems; using dry cleanup methods; treating and/or recycling collected 

stormwater runoff, minimizing run on/runoff of stormwater to maintenance 

areas.

8.P.3.1.6 Locomotive Sanding (Loading Sand for Traction) Areas. Implement 

appropriate control measures, such as the following (or other equivalent 

measures): covering sanding areas; minimizing stormwater run on/runoff; or 

appropriate sediment removal practices to minimize the offsite transport of 

sanding material by stormwater. 

8.P.3.2 Employee Training. (See also Part 2.1.2.8) Train personnel at least once a year and 

address the following activities, as applicable: used oil and spent solvent management; 

fueling procedures; general good housekeeping practices; proper painting 

procedures; and used battery management.

8.P.4 Additional SWPPP Requirements.

8.P.4.1 Drainage Area Site Map. (See also Part 5.2.2) Identify in the SWPPP the following areas 

of the facility and indicate whether activities occurring there may be exposed to 

precipitation/surface runoff: Fueling stations; vehicle/equipment maintenance or 

cleaning areas; storage areas for vehicle/equipment with actual or potential fluid 

leaks; loading/unloading areas; areas where treatment, storage or disposal of wastes 

occur; liquid storage tanks; processing areas; and storage areas.

8.P.4.2 Potential Pollutant Sources. (See also Part 5.2.3) Assess the potential for the following 

activities and facility areas to contribute pollutants to stormwater discharges: Onsite 

waste storage or disposal; dirt/gravel parking areas for vehicles awaiting maintenance; 

illicit plumbing connections between shop floor drains and the stormwater conveyance 

system(s); and fueling areas. Describe these activities in the SWPPP.

8.P.4.3 Description of Good Housekeeping Measures. You must document in your SWPPP the 

good housekeeping measures you implement consistent with Part 8.P.3.

8.P.4.4 Vehicle and Equipment Washwater Requirements. If applicable, attach to or reference 

in your SWPPP, a copy of the NPDES permit issued for vehicle/equipment washwater or, 

if an NPDES permit has not been issued, a copy of the pending application. If an 

industrial user permit is issued under a local pretreatment program, attach a copy to 

your SWPPP. In any case, implement all non-stormwater discharge permit conditions or 

pretreatment conditions in your SWPPP. If washwater is handled in another manner 

(e.g., hauled offsite), describe the disposal method and attach all pertinent 

documentation/information (e.g., frequency, volume, destination, etc.) in the plan.

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8.P.5 Additional Inspection Requirements. (See also Part 3.1) Inspect all the following 

areas/activities: storage areas for vehicles/equipment awaiting maintenance, fueling 

areas, indoor and outdoor vehicle/equipment maintenance areas, material storage 

areas, vehicle/equipment cleaning areas and loading/unloading areas.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart Q – Sector Q – Water Transportation.

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.Q.1 Covered Stormwater Discharges.

The requirements in Subpart Q apply to stormwater discharges associated with industrial 

activity from Water Transportation facilities as identified by the SIC Codes specified under Sector 

Q in Table D-1 of Appendix D of the permit.

8.Q.2 Limitations on Coverage.

8.Q.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) Not covered by this 

permit: bilge and ballast water, sanitary wastes, pressure wash water, and cooling 

water originating from vessels.

8.Q.3 Additional Technology-Based Effluent Limits.

8.Q.3.1 Good Housekeeping Measures. You must implement the following good housekeeping 

measures in addition to the requirements of Part 2.1.2.2: 

8.Q.3.1.1 Pressure Washing Area. If pressure washing is used to remove marine growth 

from vessels, the discharge water must be permitted by a separate NPDES 

permit. Collect or contain the discharges from the pressures washing area so 

that they are not co-mingled with stormwater discharges authorized by this 

permit.

8.Q.3.1.2 Blasting and Painting Area. Minimize the potential for spent abrasives, paint 

chips, and overspray to discharge into receiving waters or the storm sewer 

systems. Contain all blasting and painting activities or use other measures to 

minimize the discharge of contaminants (e.g., hanging plastic barriers or 

tarpaulins during blasting or painting operations to contain debris). At least 

once per month, you must clean stormwater conveyances of deposits of 

abrasive blasting debris and paint chips.

8.Q.3.1.3 Material Storage Areas. Store and plainly label all containerized materials 

(e.g., fuels, paints, solvents, waste oil, antifreeze, batteries) in a protected, 

secure location away from drains. Minimize the contamination of precipitation 

or surface runoff from the storage areas. Specify which materials are stored 

indoors, and containment or enclosure or use other measures for those stored 

outdoors. If abrasive blasting is performed, discuss the storage and disposal of 

spent abrasive materials generated at the facility. Implement an inventory 

control plan to limit the presence of potentially hazardous materials onsite.

8.Q.3.1.4 Engine Maintenance and Repair Areas. Minimize the contamination of 

precipitation or surface runoff from all areas used for engine maintenance 

and repair. Implement appropriate control measures, such as the following (or 

their equivalents): performing all maintenance activities indoors, maintaining 

an organized inventory of materials used in the shop, draining all parts of fluid 

prior to disposal, prohibiting the practice of hosing down the shop floor, using 

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dry cleanup methods, and treating and/or recycling stormwater runoff 

collected from the maintenance area.

8.Q.3.1.5 Material Handling Area. Minimize the contamination of precipitation or 

surface runoff from material handling operations and areas (e.g., fueling, 

paint and solvent mixing, disposal of process wastewater streams from 

vessels). Implement appropriate control measures, such as the following (or 

their equivalents): covering fueling areas, using spill and overflow protection, 

mixing paints and solvents in a designated area (preferably indoors or under a 

shed), and minimizing runoff of stormwater to material handling areas.

8.Q.3.1.6 Drydock Activities. Routinely maintain and clean the drydock to minimize 

pollutants in stormwater runoff. Address the cleaning of accessible areas of 

the drydock prior to flooding, and final cleanup following removal of the 

vessel and raising the dock. Include procedures for cleaning up oil, grease, 

and fuel spills occurring on the drydock. Implement appropriate control 

measures, such as the following (or their equivalents): sweeping rather than 

hosing off debris and spent blasting material from accessible areas of the 

drydock prior to flooding and making absorbent materials and oil 

containment booms readily available to clean up or contain any spills.

8.Q.3.2 Employee Training. (See also Part 2.1.2.8) As part of your employee training program, 

address, at a minimum, the following activities (as applicable): used oil management,

spent solvent management, disposal of spent abrasives, disposal of vessel wastewaters, 

spill prevention and control, fueling procedures, general good housekeeping practices, 

painting and blasting procedures, and used battery management.

8.Q.3.3 Preventive Maintenance. (See also Part 2.1.2.3) As part of your preventive 

maintenance program, perform timely inspection and maintenance of stormwater 

management devices (e.g., cleaning oil and water separators and sediment traps to 

ensure that spent abrasives, paint chips, and solids will be intercepted and retained 

prior to entering the storm drainage system), as well as inspecting and testing facility 

equipment and systems to uncover conditions that could cause breakdowns or failures 

resulting in discharges of pollutants to surface waters.

8.Q.4 Additional SWPPP Requirements.

8.Q.4.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP where any of 

the following may be exposed to precipitation or surface runoff: fueling; engine 

maintenance and repair; vessel maintenance and repair; pressure washing; painting; 

sanding; blasting; welding; metal fabrication; loading and unloading areas; locations 

used for the treatment, storage, or disposal of wastes; liquid storage tanks; liquid 

storage areas (e.g., paint, solvents, resins); and material storage areas (e.g., blasting 

media, aluminum, steel, scrap iron).

8.Q.4.2 Summary of Potential Pollutant Sources. (See also Part 5.2.3) Document in the SWPPP 

the following additional sources and activities that have potential pollutants associated 

with them: outdoor manufacturing or processing activities (e.g., welding, metal 

fabricating) and significant dust or particulate generating processes (e.g., abrasive 

blasting, sanding, and painting.)

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8.Q.5 Additional Inspection Requirements.

(See also Part 3.1) Include the following in all quarterly routine facility inspections: 

pressure washing area; blasting, sanding, and painting areas; material storage areas; engine 

maintenance and repair areas; material handling areas; drydock area; and general yard area.

8.Q.6 Sector-Specific Benchmarks.

Table 8.Q-1 identifies benchmarks that apply to Sector Q. These benchmarks apply to 

both your primary industrial activity and any co-located industrial activities.

Table 8.Q-1.

Subsector

(You may be subject to requirements for 

more than one sector/subsector)

Parameter Benchmark Monitoring 

Concentration

Subsector Q1. Water Transportation 

Facilities 

(SIC 4412-4499) 

Total Aluminum 0.75 mg/L

Total Iron 1.0 mg/L

Total Lead 

(freshwater)2 

Total Lead 

(saltwater)1

Hardness Dependent

0.21 mg/L 

Total Zinc 

(freshwater)2 

Total Zinc (saltwater)1 

Hardness Dependent

0.09 mg/L

1Saltwater 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 6.2.1.1, 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

(mg/L)

Zinc

(mg/L)

0-24.99 mg/L 0.014 0.04

25-49.99 mg/L 0.023 0.05

50-74.99 mg/L 0.045 0.08

75-99.99 mg/L 0.069 0.11

100-124.99 mg/L 0.095 0.13

125-149.99 mg/L 0.122 0.16

150-174.99 mg/L 0.151 0.18

175-199.99 mg/L 0.182 0.20

200-224.99 mg/L 0.213 0.23

225-249.99 mg/L 0.246 0.25

250+ mg/L 0.262 0.26

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart R – Sector R – Ship and Boat Building and Repair Yards.

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.R.1 Covered Stormwater Discharges.

The requirements in Subpart R apply to stormwater discharges associated with industrial 

activity from Ship and Boat Building and Repair Yards as identified by the SIC Codes specified 

under Sector R in Table D-1 of Appendix D of the permit.

8.R.2 Limitations on Coverage.

8.R.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) Discharges containing 

bilge and ballast water, sanitary wastes, pressure wash water, and cooling water 

originating from vessels are not covered by this permit.

8.R.3 Additional Technology-Based Effluent Limits.

8.R.3.1 Good Housekeeping Measures. (See also Part 2.1.2.2) 

8.R.3.1.1 Pressure Washing Area. If pressure washing is used to remove marine growth 

from vessels, the discharged water must be permitted as a process 

wastewater by a separate NPDES permit.

8.R.3.1.2 Blasting and Painting Area. Minimize the potential for spent abrasives, paint 

chips, and overspray to discharging into the receiving water or the storm 

sewer systems. Contain all blasting and painting activities, or use other 

measures to prevent the discharge of the contaminants (e.g., hanging plastic 

barriers or tarpaulins during blasting or painting operations to contain debris). 

When necessary, regularly clean stormwater conveyances of deposits of 

abrasive blasting debris and paint chips.

8.R.3.1.3 Material Storage Areas. Store and plainly label all containerized materials 

(e.g., fuels, paints, solvents, waste oil, antifreeze, batteries) in a protected, 

secure location away from drains. Minimize the contamination of precipitation 

or surface runoff from the storage areas. If abrasive blasting is performed, 

discuss the storage and disposal of spent abrasive materials generated at the 

facility. Implement an inventory control plan to limit the presence of 

potentially hazardous materials onsite.

8.R.3.1.4 Engine Maintenance and Repair Areas. Minimize the contamination of 

precipitation or surface runoff from all areas used for engine maintenance 

and repair. Implement appropriate control measures, such as the following (or 

their equivalents): performing all maintenance activities indoors, maintaining 

an organized inventory of materials used in the shop, draining all parts of fluid 

prior to disposal, prohibiting the practice of hosing down the shop floor, using 

dry cleanup methods, and treating and/or recycling stormwater runoff 

collected from the maintenance area.

8.R.3.1.5 Material Handling Area. Minimize the contamination of precipitation or 

surface runoff from material handling operations and areas (e.g., fueling, 

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paint and solvent mixing, disposal of process wastewater streams from 

vessels). Implement appropriate control measures, such as the following (or 

their equivalents): covering fueling areas, using spill and overflow protection, 

mixing paints and solvents in a designated area (preferably indoors or under a 

shed), and minimizing stormwater run-on to material handling areas.

8.R.3.1.6 Drydock Activities. Routinely maintain and clean the drydock to minimize 

pollutants in stormwater runoff. Clean accessible areas of the drydock prior to 

flooding and final cleanup following removal of the vessel and raising the 

dock. Include procedures for cleaning up oil, grease, or fuel spills occurring on 

the drydock. Implement appropriate control measures, such as the following 

(or their equivalents): sweeping rather than hosing off debris and spent 

blasting material from accessible areas of the drydock prior to flooding, and 

having absorbent materials and oil containment booms readily available to 

clean up and contain any spills.

8.R.3.2 Employee Training. (See also Part 2.1.2.8) As part of your employee training program, 

address, at a minimum, the following activities (as applicable): used oil management,

spent solvent management, disposal of spent abrasives, disposal of vessel wastewaters, 

spill prevention and control, fueling procedures, general good housekeeping practices, 

painting and blasting procedures, and used battery management.

8.R.3.4 Preventive Maintenance. (See also Part 2.1.2.3) As part of your preventive 

maintenance program, perform timely inspection and maintenance of stormwater 

management devices (e.g., cleaning oil and water separators and sediment traps to 

ensure that spent abrasives, paint chips, and solids will be intercepted and retained 

prior to entering the storm drainage system), as well as inspecting and testing facility 

equipment and systems to uncover conditions that could cause breakdowns or failures 

resulting in discharges of pollutants to surface waters.

8.R.4 Additional SWPPP Requirements.

8.R.4.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP where any of 

the following may be exposed to precipitation or surface runoff: fueling; engine 

maintenance or repair; vessel maintenance or repair; pressure washing; painting; 

sanding; blasting; welding; metal fabrication; loading and unloading areas; treatment, 

storage, and waste disposal areas; liquid storage tanks; liquid storage areas (e.g., paint, 

solvents, resins); and material storage areas (e.g., blasting media, aluminum, steel, 

scrap iron).

8.R.4.2 Potential Pollutant Sources. (See also Part 5.2.3) Document in your SWPPP the following 

additional sources and activities that have potential pollutants associated with them (if 

applicable): outdoor manufacturing or processing activities (e.g., welding, metal 

fabricating) and significant dust or particulate generating processes (e.g., abrasive 

blasting, sanding, and painting).

8.R.4.3 Documentation of Good Housekeeping Measures. Document in your SWPPP any good 

housekeeping measures implemented to meet the effluent limits in Part 8.R.3.

8.R.4.3.1 Blasting and Painting Areas. Document in the SWPPP any standard operating 

practices relating to blasting and painting (e.g., prohibiting uncontained 

blasting and painting over open water or prohibiting blasting and painting 

during windy conditions, which can render containment ineffective).

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8.R.4.3.2 Storage Areas. Specify in your SWPPP which materials are stored indoors, and 

contain or enclose or use other measures for those stored outdoors.

8.R.5 Additional Inspection Requirements.

(See also Part 3.1) Include the following in all quarterly routine facility inspections: 

pressure washing area; blasting, sanding, and painting areas; material storage areas; engine 

maintenance and repair areas; material handling areas; drydock area; and general yard area.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart S – Sector S – Air Transportation.

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.S.1 Covered Stormwater Discharges.

The requirements in Subpart S apply to stormwater discharges associated with industrial 

activity from Air Transportation facilities identified by the SIC Codes specified under Sector S in 

Table D-1 of Appendix D of the permit.

8.S.2 Limitation on Coverage

8.S.2.1 Limitations on Coverage. This permit authorizes stormwater discharges from only those 

portions of the air transportation facility that are involved in vehicle maintenance 

(including vehicle rehabilitation, mechanical repairs, painting, fueling and lubrication), 

equipment cleaning operations or deicing operations.

Note: “deicing” will generally be used to imply both deicing (removing frost, snow or 

ice) and anti-icing (preventing accumulation of frost, snow or ice) activities, unless 

specific mention is made regarding anti-icing and/or deicing activities.

8.S.2.2 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4 and Part 8.S.3) This permit 

does not authorize the discharge of aircraft, ground vehicle, runway and equipment 

washwaters; nor the dry weather discharge of deicing chemicals. Such discharges must 

be covered by separate NPDES permit(s). Note that a discharge resulting from 

snowmelt is not a dry weather discharge.

8.S.3 Additional Technology-Based Effluent Limits.

8.S.3.1 Good Housekeeping Measures. (See also Part 2.1.2.2) 

8.S.3.1.1 Aircraft, Ground Vehicle and Equipment Maintenance Areas. Minimize the 

contamination of stormwater runoff from all areas used for aircraft, ground 

vehicle and equipment maintenance (including the maintenance 

conducted on the terminal apron and in dedicated hangers). Implement 

appropriate control measures, such as the following practices (or their 

equivalents): performing maintenance activities indoors; maintaining an 

organized inventory of material used in the maintenance areas; draining all 

parts of fluids prior to disposal; prohibiting the practice of hosing down the 

apron or hanger floor; using dry cleanup methods; and collecting the 

stormwater runoff from the maintenance area and providing treatment or 

recycling.

8.S.3.1.2 Aircraft, Ground Vehicle and Equipment Cleaning Areas. (See also Part 

8.S.3.6) Clearly demarcate these areas on the ground using signage or other 

appropriate means. Minimize the contamination of stormwater runoff from 

cleaning areas.

8.S.3.1.3 Aircraft, Ground Vehicle and Equipment Storage Areas. Store all aircraft, 

ground vehicles and equipment awaiting maintenance in designated areas 

only and minimize the contamination of stormwater runoff from these storage 

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areas. Implement appropriate control measures, such as the following, 

including any BMPs (or their equivalents): storing aircraft and ground vehicles 

indoors; using drip pans for the collection of fluid leaks; and perimeter drains, 

dikes or berms surrounding the storage areas. 

8.S.3.1.4 Material Storage Areas. Maintain the vessels of stored materials (e.g., used oils, 

hydraulic fluids, spent solvents, and waste aircraft fuel) in good condition, to 

prevent or minimize contamination of stormwater. Also plainly label the vessels 

(e.g., “used oil,” “Contaminated Jet A,” etc.). Minimize contamination of 

precipitation/runoff from these areas. Implement appropriate control 

measures, such as the following (or their equivalents): storing materials indoors; 

storing waste materials in a centralized location; and installing berms/dikes 

around storage areas.

8.S.3.1.5 Airport Fuel System and Fueling Areas. Minimize the discharge of fuel to the 

storm sewer/surface waters resulting from fuel servicing activities or other 

operations conducted in support of the airport fuel system. Implement 

appropriate control measures, such as the following control measures (or their 

equivalents): implementing spill and overflow practices (e.g., placing 

absorptive materials beneath aircraft during fueling operations); using only dry 

cleanup methods; and collecting stormwater runoff. 

8.S.3.1.6 Source Reduction. Minimize, and where practicable eliminate, the use of 

urea and glycol-based deicing chemicals, in order to reduce the aggregate 

amount of deicing chemicals used and/or lessen the environmental impact. 

Chemical options to replace ethylene glycol, propylene glycol and urea 

include: potassium acetate; magnesium acetate; calcium acetate; and 

anhydrous sodium acetate.

8.S.3.1.6.1 Runway Deicing Operation: Minimize contamination of stormwater 

runoff from runways as a result of deicing operations. Evaluate 

whether over-application of deicing chemicals occurs by 

analyzing application rates, and adjust as necessary, consistent 

with considerations of flight safety. Implement appropriate control 

measures, such as the following options (or their equivalents): 

metered application of chemicals; pre-wetting dry chemical 

constituents prior to application; installing a runway ice detection 

system; implementing anti-icing operations as a preventive 

measure against ice buildup.

8.S.3.1.6.2 Aircraft Deicing Operations. Minimize contamination of stormwater 

runoff from aircraft deicing operations. Determine whether 

excessive application of deicing chemicals occurs and adjust as 

necessary, consistent with considerations of flight safety. This 

evaluation should be carried out by the personnel most familiar 

with the particular aircraft and flight operations in question (versus 

an outside entity such as the airport authority). Use benign 

alternative deicing/anti-icing techniques and agents as well as 

containment measures for all applied chemicals where 

practicable. Implement appropriate control measures, such as the 

following options (or their equivalents) for reducing deicing fluid 

use: forced-air deicing systems, computer-controlled fixed-gantry 

systems, infrared technology, hot water, varying glycol content to 

air temperature, enclosed-basket deicing trucks, mechanical 

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methods, solar radiation, hangar storage, aircraft covers, and 

thermal blankets for MD-80s and DC-9s. Use ice-detection systems 

and airport traffic flow strategies and departure slot allocation 

systems where practicable. 

8.S.3.1.7 Management of Runoff. (See also 2.1.2.6) Where deicing operations occur, 

implement a program to control or manage contaminated runoff to minimize 

the amount of pollutants being discharged from the site. Where practicable, 

install a centralized deicing pad to recover deicing fluid following application, 

or where impracticable, use vacuum/collection trucks (glycol recovery 

vehicles). Also, consider these control measure options (or their equivalents): a 

dedicated deicing facility with a runoff collection/ recovery system; using 

vacuum/collection trucks; storing contaminated stormwater/deicing fluids in 

tanks and releasing controlled amounts to a publicly owned treatment works; 

collecting contaminated runoff in a wet pond for biochemical decomposition 

(be aware of attracting wildlife that may prove hazardous to flight 

operations); and directing runoff into vegetative swales or other infiltration 

measures. Recover deicing materials when these materials are applied during 

non-precipitation events (e.g., covering storm sewer inlets, using booms, 

installing absorptive interceptors in the drains, etc.) to prevent these materials 

from later becoming a source of stormwater contamination. Used deicing 

fluid should be recycled whenever possible.

8.S.3.2 Deicing Season. You must determine the seasonal timeframe (e.g., DecemberFebruary, October - March) during which deicing activities typically occur at the 

facility. Implementation of control measures, including any BMPs, facility inspections 

and monitoring must be conducted with particular emphasis throughout the defined 

deicing season. If you meet the deicing chemical usage thresholds of 100,000 gallons 

glycol and/or 100 tons of urea, the deicing season you identified is the timeframe 

during which you must obtain the four required benchmark monitoring event results for 

deicing-related parameters, i.e., BOD, COD, ammonia and pH. See also Part 8.S.6.

8.S.4 Additional SWPPP Requirements.

An airport authority and tenants of the airport are encouraged to work in partnership in 

the development of a SWPPP. If an airport tenant obtains authorization under this permit and 

develops a SWPPP for discharges from his own areas of the airport, prior to authorization, that 

SWPPP must be coordinated and integrated with the SWPPP for the entire airport. Tenants of the 

airport facility include air passenger or cargo companies, fixed based operators and other 

parties who have contracts with the airport authority to conduct business operations on airport 

property and whose operations result in stormwater discharges associated with industrial activity.

8.S.4.1 Drainage Area Site Map. (See also Part 5.2.2) Document in the SWPPP the following 

areas of the facility and indicate whether activities occurring there may be exposed to 

precipitation/surface runoff: aircraft and runway deicing operations; fueling stations; 

aircraft, ground vehicle and equipment maintenance/cleaning areas; storage areas 

for aircraft, ground vehicles and equipment awaiting maintenance.

8.S.4.2 Potential Pollutant Sources. (See also Part 5.2.3) In your inventory of exposed materials, 

describe in your SWPPP the potential for the following activities and facility areas to 

contribute pollutants to stormwater discharges: aircraft, runway, ground vehicle and 

equipment maintenance and cleaning; aircraft and runway deicing operations 

(including apron and centralized aircraft deicing stations, runways, taxiways and 

ramps). If you use deicing chemicals, you must maintain a record of the types 

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(including the Material Safety Data Sheets [MSDS]) used and the monthly quantities, 

either as measured or, in the absence of metering, as estimated to the best of your 

knowledge. This includes all deicing chemicals, not just glycols and urea (e.g., 

potassium acetate), because large quantities of these other chemicals can still have 

an adverse impact on receiving waters. Tenants or other fixed-based operations that 

conduct deicing operations must provide the above information to the airport 

authority for inclusion with any comprehensive airport SWPPPs.

8.S.4.3 Vehicle and Equipment Washwater Requirements. Attach to or reference in your 

SWPPP, a copy of the NPDES permit issued for vehicle/equipment washwater or, if an 

NPDES permit has not been issued, a copy of the pending application. If an industrial 

user permit is issued under a local pretreatment program, include a copy in your 

SWPPP. In any case, if you are subject to another permit, describe your control 

measures for implementing all non-stormwater discharge permit conditions or 

pretreatment requirements in your SWPPP. If washwater is handled in another manner 

(e.g., hauled offsite, retained onsite), describe the disposal method and attach all 

pertinent documentation/information (e.g., frequency, volume, destination, etc.) in 

your SWPPP.

8.S.4.4 Documentation of Control Measures Used for Management of Runoff: Document in 

your SWPPP the control measures used for collecting or containing contaminated melt 

water from collection areas used for disposal of contaminated snow.

8.S.5 Additional Inspection Requirements.

At a minimum conduct facility inspections at least monthly during the deicing season 

(e.g., October through April for most mid-latitude airports). If your facility needs to deice before 

or after this period, expand the monthly inspections to include all months during which deicing 

chemicals may be used. The Director may specifically require you to increase inspection 

frequencies.

8.S.6 Sector-Specific Benchmarks.

Table 8.S-1 identifies benchmarks that apply to Sector S. These benchmarks apply to 

both your primary industrial activity and any co-located industrial activities.

Table 8.S-1.

Subsector

(You may be subject to requirements for 

more than one sector/subsector)

Parameter

Benchmark 

Monitoring 

Concentration

For airports where a single permittee, or a 

combination of permitted facilities use more 

than 100,000 gallons of glycol-based deicing 

chemicals and/or 100 tons or more of urea 

on an average annual basis, monitor the first 

four parameters in ONLY those outfalls that 

collect runoff from areas where deicing 

activities occur (SIC 4512-4581).

Biochemical Oxygen 

Demand (BOD5)1 

30 mg/L

Chemical Oxygen Demand 

(COD)1 

120 mg/L

Ammonia1 2.14 mg/L

pH1 6.0 - 9.0 s.u.

1 These are deicing-related parameters. Collect the four benchmark samples, and any required follow-up benchmark 

samples, during the timeframe defined in Part 8.S.3.2 when deicing activities are occurring.

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8.S.7 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1 of the 

permit.)

8.S.7.1 Airfield Pavement Deicing. Existing and new primary airports with 1,000 or more annual 

jet departures ("non-propeller aircraft") that discharge wastewater associated with 

airfield pavement deicing commingled with stormwater must either use non-ureacontaining deicers or meet the effluent limit in Table 8-S-2. 

8.S.7.2 Aircraft Deicing. Airports meeting the definition of a new source (“new airports”) with 

10,000 annual departures located in cold climate zones must collect 60 percent of 

aircraft deicing fluid after deicing. See 40 CFR 449.11 for the Airport Effluent Limitation 

Guidelines requirements for this new source category. Discharges of the collected 

aircraft deicing fluid directly to waters of the U.S. are not eligible for coverage under 

this permit.

8.S.7.3 Monitoring, Reporting and Recordkeeping. For new airports subject to the effluent 

limitations in 8.S.7.2, you must comply with the monitoring, reporting and recordkeeping 

requirements outlined in 40 CFR 449.20(a)(1) and (2).

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Table 8.S-2 

Industrial Activity Parameter Effluent Limit

Existing and new primary airports with 

1,000 or more annual jet departures that 

discharge wastewater associated with 

airfield pavement deicing that contains 

urea commingled with stormwater

Ammonia as Nitrogen 14.7 mg/L, daily 

maximum

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart T – Sector T – Treatment Works.

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.T.1 Covered Stormwater Discharges.

The requirements in Subpart T apply to stormwater discharges associated with industrial 

activity from Treatment Works as identified by the Activity Code specified under Sector T in Table 

D-1 of Appendix D of the permit.

8.T.2 Industrial Activities Covered by Sector T.

The requirements listed under this part apply to all existing point source stormwater 

discharges associated with the following activities:

8.T.2.1 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 a 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 Part 403. 

8.T.2.2 The following are not required to have permit coverage: 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.

8.T.3 Limitations on Coverage.

8.T.3.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) Sanitary and industrial 

wastewater and equipment and vehicle washwater are not authorized by this permit.

8.T.4 Additional Technology-Based Effluent Limits.

8.T.4.1 Control Measures. (See also the non-numeric effluent limits in Part 2.1.2) In addition to 

the other control measures, evaluate implementation of the following additional 

control measures: routing stormwater to the treatment works; or covering exposed 

materials (i.e., from the following areas: grit, screenings, and other solids handling, 

storage, or disposal areas; sludge drying beds; dried sludge piles; compost piles; and 

septage or hauled waste receiving station).

8.T.4.2 Employee Training. (See also Part 2.1.2.8) At a minimum, training must address the 

following areas when applicable to a facility: petroleum product management; 

process chemical management; spill prevention and controls; fueling procedures; 

general good housekeeping practices; and proper procedures for using fertilizer, 

herbicides, and pesticides.

8.T.5 Additional SWPPP Requirements.

8.T.5.1 Site Map. (See also Part 5.2.2) Document in your SWPPP where any of the following may 

be exposed to precipitation or surface runoff: grit, screenings, and other solids 

handling, storage, or disposal areas; sludge drying beds; dried sludge piles; compost 

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piles; septage or hauled waste receiving station; and storage areas for process 

chemicals, petroleum products, solvents, fertilizers, herbicides, and pesticides.

8.T.5.2 Potential Pollutant Sources. (See also Part 5.2.3) Document in your SWPPP the following 

additional sources and activities that have potential pollutants associated with them, 

as applicable: grit, screenings, and other solids handling, storage, or disposal areas; 

sludge drying beds; dried sludge piles; compost piles; septage or hauled waste 

receiving station; and access roads and rail lines.

8.T.5.3 Wastewater and Washwater Requirements. Keep a copy of all your current NPDES 

permits issued for wastewater and industrial, vehicle and equipment washwater 

discharges or, if an NPDES permit has not yet been issued, a copy of the pending 

application(s) with your SWPPP. If the washwater is handled in another manner, the 

disposal method must be described and all pertinent documentation must be retained 

onsite.

8.T.6 Additional Inspection Requirements.

(See also Part 3.1) Include the following areas in all inspections: access roads and rail 

lines; grit, screenings, and other solids handling, storage, or disposal areas; sludge drying beds; 

dried sludge piles; compost piles; and septage or hauled waste receiving station.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart U – Sector U – Food and Kindred 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.U.1 Covered Stormwater Discharges.

The requirements in Subpart U apply to stormwater discharges associated with industrial 

activity from Food and Kindred Products facilities as identified by the SIC Codes specified in 

Table D-1 of Appendix D of the permit.

8.U.2 Limitations on Coverage.

8.U.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) The following discharges 

are not authorized by this permit: discharges containing boiler blowdown, cooling tower 

overflow and blowdown, ammonia refrigeration purging, and vehicle washing and 

clean-out operations.

8.U.3 Additional Technology-Based Limitations.

8.U.3.1 Employee Training. (See also Part 2.1.2.8) Address pest control in your employee training 

program. 

8.U.4 Additional SWPPP Requirements.

8.U.4.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP the locations of 

the following activities if they are exposed to precipitation or runoff: vents and stacks 

from cooking, drying, and similar operations; dry product vacuum transfer lines; animal 

holding pens; spoiled product; and broken product container storage areas.

8.U.4.2 Potential Pollutant Sources. (See also Part 5.2.3) Document in your SWPPP, in addition to 

food and kindred products processing-related industrial activities, application and 

storage of pest control chemicals (e.g., rodenticides, insecticides, fungicides) used on 

plant grounds.

8.U.5 Additional Inspection Requirements.

(See also Part 3.1) Inspect on a quarterly basis, at a minimum, the following areas where 

the potential for exposure to stormwater exists: loading and unloading areas for all significant 

materials; storage areas, including associated containment areas; waste management units; 

vents and stacks emanating from industrial activities; spoiled product and broken product 

container holding areas; animal holding pens; staging areas; and air pollution control 

equipment.

8.U.6 Sector-Specific Benchmarks.

Table 8.U-1 identifies benchmarks that apply to the specific subsectors of Sector U. These 

benchmarks apply to both your primary industrial activity and any co-located industrial 

activities.

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Table 8.U-1.

Subsector

(You may be subject to requirements 

for more than one Sector / 

Subsector)

Parameter

Benchmark 

Monitoring 

Concentration

Subsector U1. Grain Mill Products (SIC 

2041-2048) 

Total Suspended Solids (TSS) 100 mg/L

Subsector U2. Fats and Oils Products 

(SIC 2074-2079) 

Biochemical Oxygen Demand 

(BOD5)

30 mg/L

Chemical Oxygen Demand 

(COD)

120 mg/L

Nitrate plus Nitrite Nitrogen 0.68 mg/L

Total Suspended Solids (TSS) 100 mg/L

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart V – Sector V – Textile Mills, Apparel, and Other Fabric 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.V.1 Covered Stormwater Discharges.

The requirements in Subpart V apply to stormwater discharges associated with industrial 

activity from Textile Mills, Apparel, and Other Fabric Product manufacturing as identified by the 

SIC Codes specified under Sector V in Table D-1 of Appendix D of the permit.

8.V.2 Limitations on Coverage.

8.V.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) The following are not 

authorized by this permit: discharges of wastewater (e.g., wastewater resulting from 

wet processing or from any processes relating to the production process), reused or 

recycled water, and waters used in cooling towers. If you have these types of 

discharges from your facility, you must cover them under a separate NPDES permit.

8.V.3 Additional Technology-Based Limitations.

8.V.3.1 Good Housekeeping Measures. (See also Part 2.1.2.2) 

8.V.3.1.1 Material Storage Areas. Plainly label and store all containerized materials 

(e.g., fuels, petroleum products, solvents, and dyes) in a protected area, 

away from drains. Minimize contamination of the stormwater runoff from such 

storage areas. Also consider an inventory control plan to prevent excessive 

purchasing of potentially hazardous substances. For storing empty chemical 

drums or containers, ensure that the drums and containers are clean 

(consider triple-rinsing) and that there is no contact of residuals with 

precipitation or runoff. Collect and dispose of washwater from these 

cleanings properly.

8.V.3.1.2 Material Handling Areas. Minimize contamination of stormwater runoff from 

material handling operations and areas. Implement appropriate control 

measures, such as the following (or their equivalents): use of spill and overflow 

protection; covering fueling areas; and covering or enclosing areas where the 

transfer of material may occur. When applicable, address the replacement or 

repair of leaking connections, valves, transfer lines, and pipes that may carry 

chemicals, dyes, or wastewater.

8.V.3.1.3 Fueling Areas. Minimize contamination of stormwater runoff from fueling areas. 

Implement appropriate control measures, such as the following (or their 

equivalents): covering the fueling area, using spill and overflow protection, 

minimizing run-on of stormwater to the fueling areas, using dry cleanup 

methods, and treating and/or recycling stormwater runoff collected from the 

fueling area.

8.V.3.1.4 Above-Ground Storage Tank Area. Minimize contamination of the stormwater 

runoff from above-ground storage tank areas, including the associated piping 

and valves. Implement appropriate control measures, such as the following 

(or their equivalents): regular cleanup of these areas; including measures for 

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tanks, piping and valves explicitly in your SPCC program; minimizing runoff of 

stormwater from adjacent areas; restricting access to the area; inserting filters 

in adjacent catch basins; providing absorbent booms in unbermed fueling 

areas; using dry cleanup methods; and permanently sealing drains within 

critical areas that may discharge to a storm drain.

8.V.3.2 Employee Training. (See also Part 2.1.2.8) As part of your employee training program, 

address, at a minimum, the following activities (as applicable): use of reused and 

recycled waters, solvents management, proper disposal of dyes, proper disposal of 

petroleum products and spent lubricants, spill prevention and control, fueling 

procedures, and general good housekeeping practices.

8.V.4 Additional SWPPP Requirements.

8.V.4.1 Potential Pollutant Sources. (See also Part 5.2.3) Document in your SWPPP the following 

additional sources and activities that have potential pollutants associated with them: 

industry-specific significant materials and industrial activities (e.g., backwinding, 

beaming, bleaching, backing bonding, carbonizing, carding, cut and sew operations, 

desizing, drawing, dyeing locking, fulling, knitting, mercerizing, opening, packing, 

plying, scouring, slashing, spinning, synthetic-felt processing, textile waste processing, 

tufting, turning, weaving, web forming, winging, yarn spinning, and yarn texturing).

8.V.4.2 Description of Good Housekeeping Measures for Material Storage Areas. Document in 

the SWPPP your containment area or enclosure for materials stored outdoors in 

connection with Part 8.V.3.1.1 above. 

8.V.5 Additional Inspection Requirements.

Inspect, at least monthly, the following activities and areas (at a minimum): transfer and 

transmission lines, spill prevention, good housekeeping practices, management of process waste 

products, and all structural and nonstructural management practices.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart W – Sector W – Furniture and Fixtures.

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.W.1 Covered Stormwater Discharges.

The requirements in Subpart W apply to stormwater discharges associated with industrial 

activity from Furniture and Fixtures facilities as identified by the SIC Codes specified under Sector 

W in Table D-1 of Appendix D of the permit.

8.W.2 Additional SWPPP Requirements.

8.W.2.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP where any of 

the following may be exposed to precipitation or surface runoff: material storage 

(including tanks or other vessels used for liquid or waste storage) areas; outdoor 

material processing areas; areas where wastes are treated, stored, or disposed of; 

access roads; and rail spurs.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart X – Sector X – Printing and Publishing.

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.X.1 Covered Stormwater Discharges.

The requirements in Subpart X apply to stormwater discharges associated with industrial 

activity from Printing and Publishing facilities as identified by the SIC Codes specified under 

Sector X in Table D-1 of Appendix D of the permit.

8.X.2 Additional Technology-Based Effluent Limits.

8.X.2.1 Good Housekeeping Measures. (See also Part 2.1.2.2) 

8.X.2.1.1 Material Storage Areas. Plainly label and store all containerized materials 

(e.g., skids, pallets, solvents, bulk inks, hazardous waste, empty drums, 

portable and mobile containers of plant debris, wood crates, steel racks, and 

fuel oil) in a protected area, away from drains. Minimize contamination of the 

stormwater runoff from such storage areas. Also consider an inventory control 

plan to prevent excessive purchasing of potentially hazardous substances.

8.X.2.1.2 Material Handling Area. Minimize contamination of stormwater runoff from 

material handling operations and areas (e.g., blanket wash, mixing solvents, 

loading and unloading materials). Implement appropriate control measures, 

such as the following (or their equivalents): using spill and overflow protection, 

covering fueling areas, and covering or enclosing areas where the transfer of 

materials may occur. When applicable, address the replacement or repair of 

leaking connections, valves, transfer lines, and pipes that may carry 

chemicals or wastewater.

8.X.2.1.3 Fueling Areas. Minimize contamination of stormwater runoff from fueling areas. 

Implement appropriate control measures, such as the following (or their 

equivalents): covering the fueling area, using spill and overflow protection, 

minimizing runoff of stormwater to the fueling areas, using dry cleanup 

methods, and treating and/or recycling stormwater runoff collected from the 

fueling area.

8.X.2.1.4 Above Ground Storage Tank Area. Minimize contamination of the stormwater 

runoff from above-ground storage tank areas, including the associated piping 

and valves. Consider the following (or their equivalents): regularly cleaning 

these areas, explicitly addressing tanks, piping and valves in the SPCC 

program, minimizing stormwater runoff from adjacent areas, restricting access 

to the area, inserting filters in adjacent catch basins, providing absorbent 

booms in unbermed fueling areas, using dry cleanup methods, and 

permanently sealing drains within critical areas that may discharge to a storm 

drain.

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8.X.2.2 Employee Training. (See also Part 2.1.2.8) As part of your employee training program, 

address, at a minimum, the following activities (as applicable): spent solvent 

management, spill prevention and control, used oil management, fueling procedures, 

and general good housekeeping practices.

8.X.3 Additional SWPPP Requirements.

8.X.3.1 Description of Good Housekeeping Measures for Material Storage Areas. In connection 

with Part 8.X.2.1.1, describe in the SWPPP the containment area or enclosure for 

materials stored outdoors.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart Y – Sector Y – Rubber, Miscellaneous Plastic Products, and Miscellaneous Manufacturing 

Industries.

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.Y.1 Covered Stormwater Discharges. 

The requirements in Subpart Y apply to stormwater discharges associated with industrial 

activity from Rubber, Miscellaneous Plastic Products, and Miscellaneous Manufacturing Industries 

facilities as identified by the SIC Codes specified under Sector Y in Table D-1 of Appendix D of 

the permit.

8.Y.2 Additional Technology-Based Effluent Limits.

8.Y.2.1 Controls for Rubber Manufacturers. (See also Part 2.1.2) Minimize the discharge of zinc 

in your stormwater discharges. Parts 8.Y.2.1.1 to 8.Y.2.1.5 give possible sources of zinc to 

be reviewed and list some specific control measures to be implemented (or their 

equivalents). In addition to these control measures the following include some 

additional general control measure options to be evaluated for implementation: using 

chemicals purchased in pre-weighed, sealed polyethylene bags; storing in-use 

materials in sealable containers, ensuring an airspace between the container and the 

cover to minimize “puffing” losses when the container is opened, and using automatic 

dispensing and weighing equipment.

8.Y.2.1.1 Zinc Bags. Ensure proper handling and storage of zinc bags at your facility. 

Following are some control measure options: employee training on the 

handling and storage of zinc bags, indoor storage of zinc bags, cleanup of 

zinc spills without washing the zinc into the storm drain, and the use of 2,500-

pound sacks of zinc rather than 50- to 100-pound sacks.

8.Y.2.1.2 Dumpsters. Minimize discharges of zinc from dumpsters. Following are some 

control measure options: covering the dumpster, moving the dumpster 

indoors, or providing a lining for the dumpster.

8.Y.2.1.3 Dust Collectors and Baghouses. Minimize contributions of zinc to stormwater 

from dust collectors and baghouses. Replace or repair, as appropriate, 

improperly operating dust collectors and baghouses.

8.Y.2.1.4 Grinding Operations. Minimize contamination of stormwater as a result of dust 

generation from rubber grinding operations. One control measure option is to 

install a dust collection system.

8.Y.2.1.5 Zinc Stearate Coating Operations. Minimize the potential for stormwater 

contamination from drips and spills of zinc stearate slurry that may be released 

to the storm drain. One control measure option is to use alternative 

compounds to zinc stearate.

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8.Y.2.2 Controls for Plastic Products Manufacturers. Minimize the discharge of plastic resin 

pellets in your stormwater discharges. Control measures to be implemented (or their 

equivalents) include minimizing spills, cleaning up of spills promptly and thoroughly, 

sweeping thoroughly, pellet capturing, employee education, and disposal precautions.

8.Y.3 Additional SWPPP Requirements.

8.Y.3.1 Potential Pollutant Sources for Rubber Manufacturers. (See also Part 5.2.3) Document in 

your SWPPP the use of zinc at your facility and the possible pathways through which 

zinc may be discharged in stormwater runoff.

8.Y.4 Sector-Specific Benchmarks.

Table 8.Y-1 identifies benchmarks that apply to Sector Y. These benchmarks apply to 

both your primary industrial activity and any co-located industrial activities.

Table 8.Y-1.

Subsector

(You may be subject to requirements for more 

than one sector/subsector)

Parameter Benchmark Monitoring 

Concentration

Subsector Y1. Rubber Products Manufacturing 

(SIC 3011, 3021, 3052, 3053, 3061, 3069) 

Total Zinc 

(freshwater)2 

Total Zinc 

(saltwater)1 

Hardness Dependent

0.09 mg/L 

1Saltwater 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 6.2.1.1, 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

(mg/L)

0-24.99 mg/L 0.04

25-49.99 mg/L 0.05

50-74.99 mg/L 0.08

75-99.99 mg/L 0.11

100-124.99 mg/L 0.13

125-149.99 mg/L 0.16

150-174.99 mg/L 0.18

175-199.99 mg/L 0.20

200-224.99 mg/L 0.23

225-249.99 mg/L 0.25

250+ mg/L 0.26

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart Z – Sector Z – Leather Tanning and Finishing.

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.Z.1 Covered Stormwater Discharges.

The requirements in Subpart Z apply to stormwater discharges associated with industrial 

activity from Leather Tanning and Finishing facilities as identified by the SIC Code specified 

under Sector Z in Table D-1 of Appendix D of the permit.

8.Z.2 Additional Technology-Based Effluent Limits.

8.Z.2.3 Good Housekeeping Measures. (See also Part 2.1.2.2) 

8.Z.2.3.1 Storage Areas for Raw, Semiprocessed, or Finished Tannery By-products. 

Minimize contamination of stormwater runoff from pallets and bales of raw, 

semiprocessed, or finished tannery by-products (e.g., splits, trimmings, 

shavings). Store or protect indoors with polyethylene wrapping, tarpaulins, 

roofed storage, etc. where practicable. Place materials on an impermeable 

surface and enclose or put berms (or equivalent measures) around the area 

to prevent stormwater run-on and runoff where practicable. 

8.Z.2.3.2 Material Storage Areas. Label storage containers of all materials (e.g., specific 

chemicals, hazardous materials, spent solvents, waste materials) and minimize 

contact of such materials with stormwater.

8.Z.2.3.3 Buffing and Shaving Areas. Minimize contamination of stormwater runoff with 

leather dust from buffing and shaving areas. Implement dust collection 

enclosures, preventive inspection and maintenance programs, or other 

appropriate preventive measures where practicable. 

8.Z.2.3.4 Receiving, Unloading, and Storage Areas. Minimize contamination of 

stormwater runoff from receiving, unloading, and storage areas. If these areas 

are exposed, implement appropriate control measures, such as the following 

(or their equivalents): covering all hides and chemical supplies, diverting 

drainage to the process sewer, or grade berming or curbing the area to 

prevent stormwater runoff. 

8.Z.2.3.5 Outdoor Storage of Contaminated Equipment. Minimize contact of 

stormwater with contaminated equipment. Implement appropriate control 

measures, such as the following (or their equivalents): covering equipment, 

diverting drainage to the process sewer, and cleaning thoroughly prior to 

storage.

8.Z.2.3.6 Waste Management. Minimize contamination of stormwater runoff from waste 

storage areas. Implement appropriate control measures, such as the following 

(or their equivalents): covering dumpsters, moving waste management 

activities indoors, covering waste piles with temporary covering material such 

as tarpaulins or polyethylene, and minimizing stormwater runoff by enclosing 

the area or building berms around the area.

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8.Z.3 Additional SWPPP Requirements.

8.Z.3.1 Drainage Area Site Map. (See also Part 5.2.2) Identify in your SWPPP where any of the 

following may be exposed to precipitation or surface runoff: processing and storage 

areas of the beamhouse, tanyard, and re-tan wet finishing and dry finishing operations.

8.Z.3.2 Potential Pollutant Sources. (See also Part 5.2.3) Document in your SWPPP the following 

sources and activities that have potential pollutants associated with them (as 

appropriate): temporary or permanent storage of fresh and brine-cured hides; 

extraneous hide substances and hair; leather dust, scraps, trimmings, and shavings.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart AA – Sector AA – Fabricated Metal 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.AA.1 Covered Stormwater Discharges.

The requirements in Subpart AA apply to stormwater discharges associated with industrial 

activity from Fabricated Metal Products facilities as identified by the SIC Codes specified under 

Sector AA in Table D-1 of Appendix D of the permit.

8.AA.2 Additional Technology-Based Effluent Limits.

8.AA.2.1 Good Housekeeping Measures. (See also Part 2.1.2.2) 

8.AA.2.1.1 Raw Steel Handling Storage. Minimize the generation of and/or recover and 

properly manage scrap metals, fines, and iron dust. Include measures for 

containing materials within storage handling areas.

8.AA.2.1.2 Paints and Painting Equipment. Minimize exposure of paint and painting 

equipment to stormwater.

8.AA.2.2 Spill Prevention and Response Procedures. (See also Part 2.1.2.4) Ensure that the 

necessary equipment to implement a cleanup is available to personnel. The following 

areas should be addressed

8.AA.2.2.1 Metal Fabricating Areas. Maintain clean, dry, orderly conditions in these 

areas. Use dry clean-up techniques where practicable. 

8.AA.2.2.2 Storage Areas for Raw Metal. Keep these areas free of conditions that could 

cause, or impede appropriate and timely response to, spills or leakage of 

materials. Implement appropriate control measures, such as the following (or 

their equivalents): maintaining storage areas so that there is easy access in 

the event of a spill, and labeling stored materials to aid in identifying spill 

contents.

8.AA.2.2.3 Metal Working Fluid Storage Areas. Minimize the potential for stormwater 

contamination from storage areas for metal working fluids.

8.AA.2.2.4 Cleaners and Rinse Water. Control and clean up spills of solvents and other 

liquid cleaners, control sand buildup and disbursement from sand-blasting 

operations, and prevent exposure of recyclable wastes. Substitute 

environmentally benign cleaners when possible.

8.AA.2.2.5 Lubricating Oil and Hydraulic Fluid Operations. Minimize the potential for 

stormwater contamination from lubricating oil and hydraulic fluid operations. 

Use monitoring equipment or other devices to detect and control leaks and 

overflows where practicable. Install perimeter controls such as dikes, curbs, 

grass filter strips, or equivalent measures where practicable. 

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Proposed 2013 MSGP

8.AA.2.2.6 Chemical Storage Areas. Minimize stormwater contamination and accidental

spillage in chemical storage areas. Include a program to inspect containers 

and identify proper disposal methods.

8.AA.2.3 Spills and Leaks. (See also Part 5.2.3.3) In your spill prevention and response procedures, 

required by Part 2.1.2.4, pay attention to the following materials (at a minimum): 

chromium, toluene, pickle liquor, sulfuric acid, zinc and other water priority chemicals, 

and hazardous chemicals and wastes.

8.AA.3 Additional SWPPP Requirements.

8.AA.3.1 Drainage Area Site Map. (See also Part 5.2.2) Document in your SWPPP where any of 

the following may be exposed to precipitation or surface runoff: raw metal storage 

areas; finished metal storage areas; scrap disposal collection sites; equipment storage 

areas; retention and detention basins; temporary and permanent diversion dikes or 

berms; right-of-way or perimeter diversion devices; sediment traps and barriers; 

processing areas, including outside painting areas; wood preparation; recycling; and 

raw material storage.

8.AA.3.2 Potential Pollutant Sources. (See also Part 5.2.3) Document in your SWPPP the following 

additional sources and activities that have potential pollutants associated with them: 

loading and unloading operations for paints, chemicals, and raw materials; outdoor 

storage activities for raw materials, paints, empty containers, corn cobs, chemicals, 

and scrap metals; outdoor manufacturing or processing activities such as grinding, 

cutting, degreasing, buffing, and brazing; onsite waste disposal practices for spent 

solvents, sludge, pickling baths, shavings, ingot pieces, and refuse and waste piles.

8.AA.4 Additional Inspection Requirements

8.AA.4.1 Inspections. (See also Part 3.1) At a minimum, include the following areas in all 

inspections: raw metal storage areas, finished product storage areas, material and 

chemical storage areas, spent solvents and chemical storage areas, recycling areas, 

loading and unloading areas, equipment storage areas, paint areas, drainage from 

roof and vehicle fueling and maintenance areas. Potential pollutants include 

chromium, zinc, lubricating oil, solvents, aluminum, oil and grease, methyl ethyl ketone, 

steel, and related materials.

8.AA.5 Sector-Specific Benchmarks. (See also Part 6 of the permit.)

Table 8.AA-1 

Subsector

(You may be subject to requirements 

for more than one sector/subsector)

Parameter Benchmark Monitoring 

Concentration

Subsector AA1. Fabricated Metal 

Products, except Coating (SIC 3411-

3499; 3911-3915) 

Total Aluminum 0.75 mg/L

Total Iron 1.0 mg/L

Total Zinc (freshwater)2 

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L

Nitrate plus Nitrite Nitrogen 0.68 mg/L

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Table 8.AA-1 

Subsector

(You may be subject to requirements 

for more than one sector/subsector)

Parameter Benchmark Monitoring 

Concentration

Subsector AA2. Fabricated Metal 

Coating and Engraving (SIC 3479)

Total Zinc (freshwater)2

Total Zinc (saltwater)1

Hardness Dependent

0.09 mg/L

Nitrate plus Nitrite Nitrogen 0.68 mg/L 1Saltwater 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 6.2.1.1, 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 (mg/L)

0-24.99 mg/L 0.04

25-49.99 mg/L 0.05

50-74.99 mg/L 0.08

75-99.99 mg/L 0.11

100-124.99 mg/L 0.13

125-149.99 mg/L 0.16

150-174.99 mg/L 0.18

175-199.99 mg/L 0.20

200-224.99 mg/L 0.23

225-249.99 mg/L 0.25

250+ mg/L 0.26

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart AB – Sector AB – Transportation Equipment, Industrial or Commercial Machinery 

Facilities.

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.AB.1 Covered Stormwater Discharges.

The requirements in Subpart AB apply to stormwater discharges associated with industrial 

activity from Transportation Equipment, Industrial or Commercial Machinery facilities as identified 

by the SIC Codes specified under Sector AB in Table D-1 of Appendix D of the permit.

8.AB.2 Additional SWPPP Requirements.

8.AB.2.1 Drainage Area Site Map. (See also Part 5.2.2) Identify in your SWPPP where any of the 

following may be exposed to precipitation or surface runoff: vents and stacks from 

metal processing and similar operations.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart AC– Sector AC –Electronic and Electrical Equipment and Components, Photographic 

and Optical Goods.

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.AC.1 Covered Stormwater Discharges.

The requirements in Subpart AC apply to stormwater discharges associated with industrial 

activity from facilities that manufacture Electronic and Electrical Equipment and Components, 

Photographic and Optical goods as identified by the SIC Codes specified in Table D-1 of 

Appendix D of the permit.

8.AC.2 Additional Requirements.

No additional sector-specific requirements apply.

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Part 8 – Sector-Specific Requirements for Industrial Activity

Subpart AD – Sector AD – Stormwater Discharges Designated by the Director as Requiring 

Permits.

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.AD.1 Covered Stormwater Discharges.

Sector AD is used to provide permit coverage for facilities designated by the Director as 

needing a stormwater permit, and any discharges of stormwater associated with industrial 

activity that do not meet the description of an industrial activity covered by Sectors A-AC.

8.AD.1.1 Eligibility for Permit Coverage. Because this sector is primarily intended for use by 

discharges designated by the Director as needing a stormwater permit (which is an 

atypical circumstance), and your facility may or may not normally be discharging 

stormwater associated with industrial activity, you must obtain the Director’s written 

permission to use this permit prior to submitting an NOI. If you are authorized to use this 

permit, you will still be required to ensure that your discharges meet the basic eligibility 

provisions of this permit at Part 1.1. 

8.AD.2 Sector-Specific Benchmarks and Effluent Limits. (See also Part 6 of the permit.)

The Director will establish any additional monitoring and reporting requirements for your 

facility prior to authorizing you to be covered by this permit. Additional monitoring requirements 

would be based on the nature of activities at your facility and your stormwater discharges.

Page 146 of 146