NCG030739_SWPPP_20240610

Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc. Junes,2024
Stormwater Pollution Prevention Plan
for:
McCombs Steel Company, INC.
117 Slingshot Road
Statesville, NC 28677
(7047) 873-7563
SWPPP Contact(s):
James H Baity
117 Slingshot Road
Statesville, NC 28677
[phone]
[e-mail]
SWPPP Preparation Date:
05/20/2024
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Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc. Junes,2024
Table of Contents
SECTION 1: FACILITY DESCRIPTION AND CONTACT INFORMATION............................................................1
1.1 Facility Information................................................................................................................................1
1.2 Contact Information/Responsible Parties..............................................................................................3
1.3 Stormwater Pollution Prevention Team.................................................................................................4
1.4 Site Description.....................................................................................................................................4
1.5 General Location Map...........................................................................................................................5
1.6 Site Map................................................................................................................................................5
SECTION 2: POTENTIAL POLLUTANT SOURCES.............................................................................................6
2.1 Potential Pollutants Associated with Industrial Activity..........................................................................6
2.2 Spills and Leaks....................................................................................................................................7
2.3 Unauthorized Non-stormwater Discharges Evaluation..........................................................................7
2.4 Salt Storage. .........................................................................................................................................8
2.5 Sampling Data Summary. .....................................................................................................................8
SECTION 3: STORMWATER CONTROL MEASURES (SCM) .............................................................................9
3.1 Non-numeric Technology-based Effluent Limits (BPT/BAT/BCT).........................................................9
3.2 Numeric Effluent Limitations Based on Effluent Limitations Guidelines(ELGs)..................................13
3.3 Water Quality-based Effluent Limitations and Water Quality Standards.............................................13
3.4 Sector-Specific Non-Numeric Effluent Limits. .....................................................................................14
SECTION 4: SCHEDULES AND PROCEDURES................................................................................................14
4.1 Good Housekeeping. ..........................................................................................................................14
4.2 Maintenance........................................................................................................................................14
4.3 Spill Prevention and Response Procedures........................................................................................15
4.4 Erosion and Sediment Control. ...........................................................................................................16
4.5 Employee Training..............................................................................................................................16
4.6 Inspections and Assessments.............................................................................................................16
4.7 Monitoring. ..........................................................................................................................................21
SECTION 5: DOCUMENTATION TO SUPPORT ELIGIBILITY CONSIDERATIONS UNDER OTHER FEDERAL
LAWS...................................................................................................................................................................23
5.1 Documentation Regarding Endangered Species Act(ESA) Listed Species and Critical Habitat
Protection.......................................................................................................................................................23
5.2 Documentation Regarding National Historic Preservation Act(NHPA)-Protected Properties.............23
SECTION 6: CORRECTIVE ACTIONS AND ADDITIONAL IMPLEMENTATION MEASURES..........................23
SECTION 7: SWPPP CERTIFICATION...............................................................................................................24
SECTION 8: SWPPP MODIFICATIONS..............................................................................................................25
SECTION 9: SWPPP AVAILABILITY..................................................................................................................25
SWPPP ATTACHMENTS.....................................................................................................................................25
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Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc.June5,2024
SECTION 1 : FACILITY DESCRIPTION AND CONTACT
INFORMATION
1.1 Facility Information.
Instructions:
• You will need the information from this section to complete your N01.
• For further instruction, refer to the 2021 MSGP N01 form and instructions—specifically sections C and D
of the 2021 MSGP Appendix G Notice of Intent(N01).A copy of the 2021 MSGP N01 is available at
https://www.epa.gov/npdes/stormwater-discharges-industrial-activities-epas-2021-msqp(Appendix G of
the permit)
• You must include a copy of the 2021 MSGP, or a reference or link to where a copy can be found, in
Attachment C of your SWPPP.
Facility Information
Facility Name: McCombs Steel Company, Inc.
Street/Location: 117 Slingshot Road
City: Statesville State: NC ZIP Code: 28677
County or Similar Government Subdivision: Iredell
NPDES ID (i.e., permit tracking number): NGC03000 (if covered under a previous permit)
Primary Industrial Activity SIC code, and Sector and Subsector(2021 MSGP, Appendix D and Part 8):
SIC- 3441
Co-located Industrial Activity(s) SIC code(s), Sector(s) and Subsector(s) (2021 MSGP, Appendix D):
NAICS - 332312
Is your facility presently inactive and unstaffed and are there no industrial materials or activities exposed
to stormwater? ❑ Yes ❑x No
Latitude/Longitude
Latitude: Longitude:
035.7691954183 ° N (decimal degrees) -080.9076560569 °W (decimal degrees)
Method for determining latitude/longitude (check one):
El Maps (If USGS topographic map used, specify scale: ) OGPS
El Other(please specify):
Horizontal Reference Datum (check one):
❑NAD 27 ❑x NAD 83 ❑WGS 84
Is the facility located in Indian country? ❑ Yes ❑x No
If yes, provide the name of the Indian tribe associated with the area of Indian country (including name of
Indian reservation, if applicable).
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Are you considered a "federal operator" of the facility?
Federal Operator—an entity that meets the definition of"operator" in [the 2021 MSGP]and is either any
department, agency or instrumentality of the executive, legislative,and judicial branches of the Federal
government of the United States, or another entity, such as a private contractor, operating for any such
department, agency, or instrumentality. ❑ Yes ❑X No
Estimated area of industrial activity at your facility exposed to stormwater:
(to the nearest quarter acre)
Discharge Information
Does this facility discharge stormwater into a municipal separate storm sewer system (MS4)?
❑x Yes ❑ No
If yes, name of MS4 operator: City of Statesville
Name(s) of surface water(s)that receive stormwater from your facility: Third Creek
Does this facility discharge industrial stormwater directly into any segment of an "impaired water" (see
definition in 2021 MSGP, Appendix A)? ❑ Yes ❑x No
If Yes, identify name of the impaired water(s) (and segment(s), if applicable):
Identify the pollutant(s) causing the impairment(s):
Which of the identified pollutants may be present in industrial stormwater discharges from this
facility?
Has a Total Maximum Daily Load (TMDL) been completed for any of the identified pollutants? If yes,
please list the TMDL pollutants:
Does this facility discharge industrial stormwater into a receiving water designated as a Tier 2, Tier 2.5 or
Tier 3 water(see definitions in 2021 MSGP, Appendix A)? ❑ Yes ❑x No
Are any of your stormwater discharges subject to effluent limitation guidelines (ELGs) (2021 MSGP
Table 1-1)? ❑ Yes ❑x No
If Yes, which guidelines apply?
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Stormwater Pollution Prevention Plan(SWPPP)
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1.2 Contact Information/Responsible Parties.
Instructions:
• List the facility operator(s),facility owner and SWPPP contact(s). Indicate respective responsibilities,
where appropriate.
• You will need the information from this section of the SWPPP Template for your NO1.
• Refer to Section B of the NO1 instructions(available in Appendix G of the 2021 MSGP).
Facility Operator(s):
Name: James H Baity
Address: 117 Slingshot Road
City, State, Zip Code: Statesville, NC 28677
Telephone Number: [phone]
Email address:[e-mail]
Fax number: [phone]
(repeat for multiple operators by copying and pasting the above rows)
Facility Owner(s):
Name: McCombs Steel Company, Inc.
Address: 117 Slingshot Road
City, State, Zip Code: Statesville, NC 28677
Telephone Number: [phone]
Email address: [e-mail]
Fax number: [phone]
(repeat for multiple operators by copying and pasting the above rows)
SWPPP Contact(s):
SWPPP Contact Name (Primary): James H Baity
Telephone number: [phone]
Email address:[e-mail]
Fax number: [phone]
SWPPP Contact Name (Backup): David Kren
Telephone number: [phone]
Email address: [e-mail]
Fax number: [phone]
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Stormwater Pollution Prevention Plan(SWPPP)
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1.3 Stormwater Pollution Prevention Team.
Instructions(see 2021 MSGP Part 6.2.1):
The stormwater pollution prevention team is responsible for overseeing development of the facility's SWPPP, any
modifications to it, and for implementing and maintaining control measures, taking corrective action and or
additional implementation measure(AIM) responses when required. Each member of the stormwater pollution
prevention team should have ready access to the 2021 MSGP,the most updated copy of the SWPPP, and other
relevant documents that must be kept with the SWPPP.
• Identify the staff members(by name and/or title)that comprise the facility's stormwater pollution
prevention team as well as their individual responsibilities.
• EPA recommends, but does not require,the stormwater pollution prevention team include at least one
individual from each shift to ensure that there is always a stormwater pollution prevention team member
on-site.
Staff Names Individual Responsibilities
M. W. McCombs, III Executive development, management, and implementation of the
President SWPPP
James Baity Manage daily SWPPP implementation including training, inspections,
Human Resources, Safety, stormwater sampling and testing, and spill response.
Health Manager
Jason Northup, Maintenance Inspections, training, and spill response.
Manager
Chris Mannis, Inspections, training, and spill response.
Prod u ction/SafetyCoordinator
[Repeat as necessary] [Repeat as necessary]
[Repeat as necessary] [Repeat as necessary]
1.4 Site Description.
Instructions(see 2021 MSGP Part 6.2.2):
Provide a description of the nature of the industrial activities conducted at your facility. For the MSGP, industrial
activities consist of: manufacturing and processing; material handling activities including storage, loading and
unloading, transportation, or conveyance of any raw material, intermediate product, final product, by-product or
waste product; and vehicle and equipment fueling, maintenance and cleaning.
Industrial activities may occur at any of the following areas(list not exhaustive): industrial plant yards; immediate
access roads and rail lines used or traveled by carriers of raw materials, manufactured products,waste material,
or by-products used or created by the facility; material handling sites; refuse sites; sites used for the application or
disposal of process waste waters sites used for the storage and maintenance of material handling equipment;
sites used for residual treatment,storage, or disposal; shipping and receiving areas; manufacturing buildings;
storage areas(including tank farms)for raw materials, and intermediate and final products; and areas where
industrial activity has taken place in the past and significant materials remain and are exposed to stormwater.
EPA recommends that you differentiate activities that occur indoors from those that occur outdoors and could be
exposed to stormwater, or under cover but that could be exposed to run-on. Do not overlook processes that are
vented and may contribute pollutants to the roof.
McCombs Steel is a structural steel fabrication facility:
Cut, drill, mill and coping of structural steel.
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Prime painting of structural steel.
1.5 General Location Map.
Instructions(see 2021 MSGP Part 6.2.2):
Provide a general location map(e.g., U.S. Geological Survey(USGS)quadrangle map)with enough detail to
identify the location of your facility and all receiving waters for your stormwater discharges(include as Attachment
A of this SWPPP Template).
The general location map for this facility can be found in Attachment A.
1.6 Site Map.
Instructions(see 2021 MSGP Part 6.2.2):
Prepare a site map showing the following information. The site map will be included as Attachment B of the finished
SWPPP.
• Boundaries of the property and the size of the property in acres;
• Location and extent of significant structures and impervious surfaces;
• Directions of stormwater flow(use arrows), including flows with a significant potential to cause soil erosion;
• Locations of all stormwater control measures;
• Locations of all receiving waters, including wetlands, in the immediate vicinity of your facility, indicating
which waterbodies are listed as impaired and which are identified by your state,tribe or EPA as Tier 2,
Tier 2.5, or Tier 3 waters;
• Locations of all stormwater conveyances including ditches, pipes, and swales;
• Locations of potential pollutant sources identified under Part 6.2.3;
• Locations where significant spills or leaks identified under Part 6.2.3.3 have occurred;
• Locations of all stormwater monitoring points;
• Locations of stormwater inlets and discharge points,with a unique identification code for each discharge
point(e.g., 001, 002), indicating if you are treating one or more discharge points as"substantially identical"
under Parts 3.2.4.5, 6.2.5.3, and 4.1.1, and an approximate outline of the areas draining to each discharge
point;
• If applicable, MS4s and where your stormwater discharges to them;
• Areas of Endangered Species Act-designated critical habitat for endangered or threatened species, if
applicable; and
• Locations of the following activities where such activities are exposed to precipitation:
o fueling stations;
o vehicle and equipment maintenance and/or cleaning areas;
o loading/unloading areas;
o locations used for the treatment, storage, or disposal of wastes;
o liquid storage tanks;
o processing and storage areas;
o immediate access roads and rail lines used or traveled by carriers of raw materials, manufactured
products,waste material, or by-products used or created by the facility;
o transfer areas for substances in bulk;
o machinery; and
o locations and sources of run-on to your site from adjacent property that contains significant quantities
of pollutants.
The site map for this facility can be found in Attachment B.
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Stormwater Pollution Prevention Plan(SWPPP)
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SECTION 2: POTENTIAL POLLUTANT SOURCES
Section 2 will describe all areas at your facility where industrial materials or activities are exposed to
stormwater or from which authorized non-stormwater discharges originate. Industrial materials or activities
include but are not limited to material handling equipment or activities; industrial machinery; raw materials;
intermediate products, by-products, final products, and waste products. Material handling activities include,
but are not limited to the storage, loading, and unloading, transportation, or conveyance of any raw
material, intermediate product, final product or waste product. For structures located in areas of industrial
activity, you must be aware that the structures themselves are potential sources of pollutants. This could
occur, for example, when metals such as aluminum or copper are leached from the structures as a result of
acid rain.
For each area identified, the SWPPP must include industrial activities in the area, potential pollutants or
pollutant constituents for each identified activity, documentation of where potential spills and leaks could
contribute pollutants to stormwater discharges, evaluation of unauthorized non-stormwater discharges, salt
storage location, stormwater discharge sampling data and descriptions of stormwater control measures.
2.1 Potential Pollutants Associated with Industrial Activity.
Instructions(see 2021 MSGP Parts 6.2.3.1 and 6.2.3.2):
For the industrial activities identified in section 1.4 above, list the potential pollutants or pollutant constituents(e.g.,
crankcase oil,zinc, sulfuric acid, cleaning solvents).
In your list of pollutants associated with your industrial activities, include all significant materials that have been
handled, treated, stored, or disposed, and that have been exposed to stormwater in the three years prior to the
date you prepare or amend your SWPPP.
Industrial Activity Associated Pollutants
541 Buffalo Shoals Road, vehicle maintenance is Diesel fuel
performed at the service shop, approximately 250-
gallon diesel storage tank is used for vehicle
fueling.
If you are a Sector S (Air Transportation)facility, do you anticipate using more than 100,000 gallons of pure
glycol in glycol-based deicing fluids and/or 100 tons or more of urea on an average annual basis?
❑ Yes ❑ No
If you are a Sector G (Metal Mining)facility, do you have discharges from waste rock and overburden piles?
❑ Yes ❑ No
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Stormwater Pollution Prevention Plan(SWPPP)
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2.2 Spills and Leaks.
Instructions(See 2021 MSGP Part 6.2.3.3):
Include the following in this section:
• Potential spills and leaks:A description of where potential spills and leaks could occur at your site that
could contribute pollutants to your stormwater discharge, and specify the discharge points that would be
affected by such spills and leaks.
• Past spills and leaks:A description of significant spills and leaks of oil or toxic or hazardous substances
that actually occurred at exposed areas, or that drained to a stormwater conveyance in the three years
prior to the date you prepare or amend your SWPPP.
Note:Significant spills and leaks include, but are not limited to, releases of oil or hazardous substances in excess
of quantities that are reportable under CWA Section 311 (see 40 CFR 110.6 and 40 CFR 117.21)or Section 102
of the Comprehensive Environmental Response, Compensation and Liability Act(CERCLA), 42 USC§9602.
Areas of Site Where Potential Spills/Leaks Could Occur
Location Discharge Points
541 Buffalo Shoals Road, vehicle maintenance is performed at Drainage area 3 (3.72 acres)
the service shop, approximately 250-gallon diesel storage tank is maintenance shop &storage yard
used for vehicle fueling. discharges to curb inlet in Cochran
Street, City of Statesville MS4, which
discharges to unnamed tributary to
Third Creek
Description of Past Spills/Leaks
Date Description Discharge Points
None
2.3 Unauthorized Non-stormwater Discharges Evaluation.
Instructions(see 2021 MSGP Part 6.2.3.4):
Part 1.2.2 of the 2021 MSGP identifies authorized non-stormwater discharges. The questions below require you to
provide documentation of the following:
• Evaluation for the presence of unauthorized non-stormwater discharges at your site; and
• Elimination of any unauthorized non-stormwater discharges.
Description of this facility's unauthorized non-stormwater discharge evaluation:
• Date of evaluation: None.
• Description of the evaluation criteria used: None.
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Stormwater Pollution Prevention Plan(SWPPP)
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• List of the discharge points or onsite drainage points that were directly observed during the
evaluation: None.
• Action(s) taken, such as a list of control measures used to eliminate unauthorized discharge(s), or
documentation that a separate NPDES permit was obtained. For example, a floor drain was
sealed, a sink drain was re-routed to sanitary or an NPDES permit application was submitted for an
unauthorized cooling water discharge: None.
2.4 Salt Storage.
Instructions(see 2021 MSGP Part 6.2.3.5):
Document the location of any storage piles containing salt used for deicing or other commercial or industrial
purposes.
Note: You will be asked additional questions concerning salt storage in Section 3.1.7 of this SWPPP template,
below.
None.
2.5 Sampling Data Summary.
Instructions(See 2021 MSGP Part 6.2.3.6):
Existing permitted facilities must summarize all stormwater discharge sampling data collected at the facility during
the previous permit term. Include a narrative description that adequately summarizes the collected sampling data
to support identification of potential pollution sources. Note that data tables and/or figures may be used to aid the
summary. New discharges and new sources must provide a summary of any available stormwater data they may
have.
Discharge/Sampling Points
Point Number Description Latitude Longitude
1 18"CMP at Buffalo Shoals Rd &Slingshot Rd 35.7708717148 -80.9087457772
2 FES @ Rip Rap ditch to railroad 35.7703153855 -80.9047742503
3 Curb Inlet in Cochran St 35.7714516535 -80.9035409546
4 Sediment basin 35.7708719597 -80.9029950546
5 Road ditch on Slingshot Rd @ railroad 35.7686701789 -80.9085887368
6 36"steel pipe @ railroad 35.7691954183 -80.9076560569
7 Railroad ditch southeast corner 35.7709052951 -80.9023316450
8 Sediment basin @ Winston Ave 35.7685220298 -80.9061701182
SEE ATTACHED ANALYTICAL RESULTS
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Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc.June5,2024
SECTION 3: STORMWATER CONTROL MEASURES (SCM)
Instructions(See 2021 MSGP Parts 2.1.2, Part 8, and 6.2.4):
In Sections 3.1 -3.4 of this SWPPP template,you are asked to describe the stormwater control measures(SCMs)
that you have installed at your site to meet each of the permit's
• Non-numeric technology-based effluent limits in Part 2.1.2;
• Applicable numeric effluent limitations guidelines-based limits in Part 2.1.3 and Part 8;
• Water quality-based effluent limits in Part 2.2;
• Any additional measures that formed the basis of eligibility regarding Endangered Species Act-listed
threatened and endangered species or their critical habitat, National Historic Preservation Act historic
properties, and/or federal CERCLA site requirements in Part 2.3; and
• Applicable effluent limits in Parts 8 and 9.
Regarding your control measures, you must also document,as appropriate:
• How you addressed the selection and design considerations in the 2021 MSGP Part 2.1.1); and
• How they address the pollutant sources identified in section 2.1 of the Template.
3.1 Non-numeric Technology-based Effluent Limits (BPT/BAT/BCT)
You must comply with the following non-numeric effluent limits as well as any sector-specific non-numeric
effluent limits in Part 8, except where otherwise specified.
3.1.1 Minimize Exposure.
Instructions(see 2021 MSGP Part 2.1.2.1):
Describe any structural controls or practices used to minimize the exposure of manufacturing, processing, and
material storage areas(including loading and unloading, storage, disposal, cleaning, maintenance,and fueling
operations)to rain,snow, snowmelt and stormwater. Describe where the controls or practices are being
implemented at your site.
Most outdoor surfaces at the facility are gravel. All the processing operations are indoors. The
maintenance of equipment is done indoors. Ditches were observed along several of the roads and
railroad tracks at the facility to help manage stormwater runoff. To limit erosion in these ditches, the
ditches are stabilized with grass. The facility uses two sedimentation ponds, one at the eastern end,
which can overflow across the ground via an emergency spillway and a second sedimentation pond on
the south side serving much of the storage yard, with an outlet towards the rail line. There is a mid-yard
drain that is piped to the southern pond. Riprap is also used in a few spots, including slow flow from the
drainage system serving much of the storage yard. Spills indoors are addressed with absorbent
materials. Most of the indoor manufacturing processes are dry processes, so there is minimal
opportunity for spills.
3.1.2 Good Housekeeping.
Instructions(see 2021 MSGP Parts 2.1.2.2 and 6.2.5.1.a):
Describe any practices you are implementing to keep exposed areas of your site that are potential sources of
pollutants clean. Describe where each practice is being implemented at your site. Include here your schedule or
convention used for: (1)determining when pickup and disposal of waste materials occurs;and (2) routine
inspections for leaks and conditions of drums,tanks, and containers. Note: There are specific requirements for
facilities that handle pre-production plastic.
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Good Housekeeping
Typical good housekeeping practices that help prevent storm water pollution include:
• Maintain dry and clean floors
• Clean up dry loose debris with brooms
• Use drip pans
• Use dry cleanup methods to collect spills
• Clean up spills promptly and thoroughly
• Regularly pick up and disposing of garbage, debris, and waste materials
• Keep all areas exposed to storm water clean and orderly
• Inspect drains, loading docks, outdoor storage and waste collection areas daily for
signs of contamination
• Waste material stored in watertight waste containers (dumpsters) until removed by
waste/recycle disposal contractor weekly
• Unusable material and equipment shall be removed from the yard within 30 days
• Equipment operators shall inspect the diesel tank and containment structure for
leaks at each fueling
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3.1.3 Maintenance.
Instructions(see 2021 MSGP Parts 2.1.2.3 and 6.2.5.1.b):
Describe procedures to: (1)maintain all control measures in effective operating condition; and (2) maintain
industrial equipment and systems in order to minimize pollutant discharges. Include the schedule or frequency you
will follow for such maintenance activities. Describe where each applicable procedure is being implemented at the
site.
There is a service shop in a separate building along the north side of the property. Equipment
is maintained and stored indoors.
3.1.4 Spill Prevention and Response Procedures.
Instructions (see 2021 MSGP Parts 2.1.2.4 and 6.2.5.1.c):
Describe any structural controls or procedures used to prevent the potential for leaks, spills, and other releases that
may be exposed to stormwater and respond to any spills and leaks, including notification procedures.You must
conduct spill prevention and response measures, including but not limited to the following:
• Clean up spills and leaks promptly using dry methods (e.g.,absorbents)to prevent the discharge of
pollutants;
• Use drip pans and absorbents if leaky vehicles and/or equipment are stored outdoors;
• Use spill/overflow protection equipment;
• Plainly label containers(e.g., "Used Oil,""Spent Solvents,""Fertilizers and Pesticides")that could be
susceptible to spillage or leakage to encourage proper handling and facilitate rapid response if spills or
leaks occur;*
• Implement procedures for material storage and handling, including the use of secondary containment and
barriers between material storage and traffic areas, or a similarly effective means designed to prevent the
discharge of pollutants from these areas;
• Develop training on procedures for expeditiously stopping, containing, and cleaning up leaks, spills, and
other releases.As appropriate, execute such procedures as soon as possible;
• Keep spill kits onsite, located near areas where spills may occur or where a rapid response can be made;
and
• Notify appropriate facility personnel when a leak, spill or other release occurs.
• Specify cleanup equipment, procedures and spill logs, as appropriate, in the event of spills.
Describe where each control is to be located or where applicable procedures will be implemented.
Note:Some facilities may be required to develop a Spill Prevention Control and Countermeasure (SPCC)plan
under a separate regulatory program (40 CFR 112). If you are required to develop an SPCC plan, or you already
have one, you may include references to the relevant requirements from your plan provided that you keep a copy of
that other plan onsite and make it available for review.
EPA recommends you include:
Where a leak,spill or other release containing a hazardous substance or oil in an amount equal to or in excess of a
reportable quantity established under either 40 CFR Part 110,40 CFR Part 117,or 40 CFR Part 302 occurs during a
24-hour period,you must notify the National Response Center(NRC)at(800)424-8802 or, in the Washington, DC,
metropolitan area, call [phone] in accordance with the requirements of 40 CFR Part 110,40 CFR Part 117,
and 40 CFR Part 302 as soon as you have knowledge of the discharge. State or local requirements may necessitate
reporting spills or discharges to local emergency response, public health, or drinking water supply agencies. Contact
information must be in locations that are readily accessible and available.
Review spill response procedures. Identify what employees should do in the event of a minor
spill or release. A minor spill or releases can be controlled at the time of the release by
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employees in the immediate work area. Major spills and emergency response require
specialized training. Identify any spills or releases in the past 12 months, the point of contact,
and designate where MSDS, personal protective equipment, spill response kits, and storm drain
inlet/outlet protection is stored and maintained.
3.1.5 Erosion and Sediment Controls.
Instructions(see 2021 MSGP Parts 2.1.2.5 and 6.2.5.1.d):
Describe activities and processes for stabilizing exposed soils to minimize erosion. Describe flow velocity
dissipation devices placed at all discharge locations and all structural and non-structural control measures to
prevent the discharge of sediment. If applicable, describe the type and purpose of any polymers and/or chemical
treatments used to control erosion and the location at your site where each control is implemented.
The facility uses two sedimentation ponds, one at the eastern end, which can overflow across
the ground via an emergency spillway and a second sedimentation pond on the south side
serving much of the storage yard, with an outlet towards the rail line. There is a mid-yard
drain that is piped to the southern pond. Riprap is also used in a several spots indicated on
the site plan, including to slow flow from the drainage system serving much of the storage
yard.
3.1.6 Management of Stormwater.
Instructions(See 2021 MSGP Part 2.1.2.6):
Describe controls used at your site to divert,infiltrate, reuse,contain,or otherwise reduce stormwater to minimize pollutants in
your discharges. Describe the location at your site where each control is implemented.
The facility uses two sedimentation ponds, one at the eastern end, which can overflow across
the ground via an emergency spillway and a second sedimentation pond on the south side
3.1.7 Salt Storage Piles or Piles Containing Salt.
Instructions(see 2021 MSGP Part 2.1.2.7):
If applicable, describe structures at your site that either cover or enclose salt storage piles or piles containing salt,
and any controls that minimize or prevent the discharge of stormwater from such piles.Also, describe any
measures(e.g. good housekeeping, diversions, containment) used to minimize exposure resulting from adding to
or removing materials from the pile. Describe the location at your site where each control and/or procedure is
implemented.
None.
3.1.8 Dust Generation and Vehicle Tracking of Industrial Materials.
Instructions(see 2021 MSGP Part 2.1.2.10):
Describe controls and procedures that will be used at your site to minimize generation of dust and off-site tracking
of raw,final, or waste materials in order to minimize pollutants discharged via stormwater.
The operator will maintain the facility with gravel or aggregates to control dust. If these management
practices are ineffective, water spray will be used to control generated dust. In addition, if necessary,
calcium chloride shall be applied.
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Stormwater Pollution Prevention Plan(SWPPP)
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3.2 Numeric Effluent Limitations Based on Effluent Limitations Guidelines
(EL Gs).
Instructions(see 2021 MSGP Part 2.1.3):
If you are in an industrial category subject to one of the ELGs identified in the table below(Table 2-1 of the 2021
MSGP), describe controls or procedures that will be implemented at your site to meet these effluent limitations
guidelines.
Not a Regulated Activity.
Regulated Activity 40 CFR Part/Subpart Effluent Limit
Discharges resulting from spray down or intentional wetting of logs at Part 429, Subpart I See Part 8.A.8
wet deck storage areas
Runoff from phosphate fertilizer manufacturing facilities that comes into Part 418, Subpart A See Part 8.C.5
contact with any raw materials,finished product, by-products or waste
products(SIC 2874)
Runoff from asphalt emulsion facilities Part 443, Subpart A See Part 8.D.5
Runoff from material storage piles at cement manufacturing facilities Part 411, Subpart C See Part 8.E.6
Mine dewatering discharges at crushed stone, construction sand and Part 436, Subparts B, See Part 8.J.10
gravel, or industrial sand mining facilities C, or D
Runoff from hazardous waste landfills Part 445, Subpart A See Part 8.K.7
Runoff from non-hazardous waste landfills Part 445, Subpart B See Part 81.11
Runoff from coal storage piles at steam electric generating facilities Part 423 See Part 8.0.8
Runoff containing urea from airfield pavement deicing at existing and Part 449 See Part 8.S.9
new primary airports with 1,000 or more annual non-propeller aircraft
departures
3.3 Water Quality-based Effluent Limitations and Water Quality Standards.
Instructions(see 2021 MSGP Part 2.2.1):
Describe the measures that will be implemented at your site to control industrial stormwater discharge as
necessary to meet applicable water quality standards of all applicable states, tribes, and U.S. territories.
EPA expects that compliance with the conditions in this permit will control discharges as necessary to meet
applicable water quality standards. If at any time you become aware, or EPA determines, that your stormwater
discharge will not be controlled as necessary such that the receiving water of the United States will not meet an
applicable water quality standard,you must take corrective action(s)as required in Part 5.1 of the 2021 MSGP
and document the corrective actions as required in 2021 MSGP Part 5.3. You must also comply with any
additional requirements that your state or tribe requires in 2021 MSGP Part 9.
EPA may also require that you undertake additional control measures(to meet the narrative water quality-based
effluent limit above)on a site-specific basis, or require you to obtain coverage under an individual permit, if
information in your N01, required reports, or from other sources indicates that your discharges are not controlled
as necessary such that the receiving water of the United States will not meet applicable water quality standards.
You must implement all measures necessary to be consistent with an available wasteload allocation in an EPA-
established or approved TMDL.
ANALYTICAL RESULTS DO INDICATE THAT ADDITIONAL MEASURES ARE REQUIRED.
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Stormwater Pollution Prevention Plan(SWPPP)
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3.4 Sector-Specific Non-Numeric Effluent Limits.
Instructions(see 2021 MSGP Part 8):
Describe any controls or procedures that will be used at your site to comply with any sector-specific requirements
that apply to you in Part 8 of the 2021 MSGP. Describe the location at your site where each control and/or procedure
will be implemented.
Note:Sector-specific effluent limits apply to Sectors A, E, F, G, H, 1, J, L, M, N, 0, P, Q, R, S, T, U, V,X, Y, Z and
AA.
ANALYTICAL RESULTS DO INDICATE THAT ADDITIONAL MEASURES ARE REQUIRED.
SECTION 4: SCHEDULES AND PROCEDURES
4.1 Good Housekeeping.
Instructions(see 2021 MSGP Part 6.2.5.1.a):
Document a schedule or the convention used for determining when pickup and disposal of waste materials occurs
(e.g., roll off dumpsters are collected when full). Provide a schedule for routine inspections for leaks and
conditions of drums,tanks, and containers.
• Maintain dry and clean floors
• Clean up dry loose debris with brooms
• Use drip pans
• Use dry cleanup methods to collect spills
• Clean up spills promptly and thoroughly
• Regularly pick up and disposing of garbage, debris, and waste materials
• Keep all areas exposed to storm water clean and orderly
• Inspect drains, loading docks, outdoor storage and waste collection areas daily for
signs of contamination
• Waste material stored in watertight waste containers (dumpsters) until removed by
waste/recycle disposal contractor weekly
• Unusable material and equipment shall be removed from the yard within 30 days
• Equipment operators shall inspect the diesel tank and containment structure for
leaks at each fueling
4.2 Maintenance.
Instructions(see 2021 MSGP Part 6.2.5.1.b):
Document preventative maintenance procedures, including regular inspections,testing, maintenance and repair of
all stormwater control measures to avoid situations that may result in leaks, spills, and other releases, and any
back-up practices in place should a runoff event occur while a control measure is off-line. Include the schedule or
frequency for maintaining all control measures used to comply with the effluent limits in Part 2 of the 2021 MSGP.
There is a service shop in a separate building along the north side of the property. Equipment is
maintained and stored indoors daily.
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Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc.June5,2024
4.3 Spill Prevention and Response Procedures.
Instructions(see 2021 MSGP Part 6.2.5.1.c):
Document procedures for preventing and responding to spills and leaks, including notification procedures. For
preventing spills, include stormwater control measures for material handling and storage,and the procedures for
preventing spills that can contaminate stormwater.Also specify cleanup equipment, procedures and spill logs,as
appropriate, in the event of spills. You may reference the existence of other plans for Spill Prevention Control and
Countermeasure(SPCC)developed for the facility under Section 311 of the Clean Water Act(CWA)or best
management practices(BMP) programs otherwise required by an NPDES permit for the facility, provided that you
keep a copy of that other plan onsite and make it available for review.
Review spill response procedures. Identify what employees should do in the event of a minor
spill or release. A minor spill or releases can be controlled at the time of the release by
employees in the immediate work area. Major spills and emergency response require
specialized training. Identify any spills or releases in the past 12 months, the point of contact,
and designate where MSDS, personal protective equipment, spill response kits, and storm drain
inlet/outlet protection is stored and maintained.
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Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc.June5,2024
4.4 Erosion and Sediment Control.
Instructions(see 2021 MSGP Part 6.2.5.1.d):
Document if polymers and/or other chemical treatments are used as part of your erosion and sediment controls
and identify the polymers and/or chemicals used and the purpose.
None.
4.5 Employee Training.
Instructions(see 2021 MSGP Part 2.1.2.8 and Part 6.2.5.1.e):
Provide the elements of your training plan, including, but not necessarily limited to:
• The content of the training;
• The frequency/schedule of training for employees who work in areas where industrial materials or
activities are exposed to stormwater, or who are responsible for implementing activities necessary to
meet the conditions of the permit; and
• A log of the dates on which specific employees received training.
The following personnel, at a minimum, must receive training, and therefore should be listed out individually in the
table below:
• Personnel who are responsible for the design, installation, maintenance,and/or repair of controls
(including pollution prevention measures);
• Personnel responsible for the storage and handling of chemicals and materials that could become
pollutants discharged via stormwater;
• Personnel who are responsible for conducting and documenting monitoring and inspections as required
in 2021 MSGP Parts 3 and 4; and
• Personnel who are responsible for taking and documenting corrective actions as required in 2021 MSGP
Part 5.
2021 MSGP Part 2.1.2.8 requires that the personnel who are required to be trained must also be trained to
understand the following if related to the scope of their job duties (e.g., only personnel responsible for conducting
inspections need to understand how to conduct inspections):
• An overview of what is in the SWPPP;
• Spill response procedures, good housekeeping, maintenance requirements, and material management
practices;
• The location of all the controls required by this permit,and how they are to be maintained;
• The proper procedures to follow with respect to the permit's pollution prevention requirements;
• When and how to conduct inspections, record applicable findings, and take corrective actions; and
• The facility's emergency procedures, if applicable per 2021 MSGP Part 2.1.1.8.
Review the Site Plan
Review drainage areas, material storage areas, underground storage tanks, above ground
storage tanks, secondary containment, loading and unloading areas, stormwater and sanitary
piping, manholes, cleanouts, drains, inlets, outfalls, oil water separators, and stormwater control
devices.
Identify where MSDS, personal protective equipment, spill response kits, and storm drain
inlet/outlet protection is maintained.
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Stormwater Pollution Prevention Plan(SWPPP)
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Spill Response
Review spill response procedures. Identify what employees should do in the event of a minor
spill or release. A minor spill or releases can be controlled at the time of the release by
employees in the immediate work area. Major spills and emergency response require
specialized training. Identify any spills or releases in the past 12 months, the point of contact,
and where MSDS, personal protective equipment, spill response kits, and storm drain
inlet/outlet protection is maintained.
4.6 Inspections and Assessments.
Instructions(see 2021 MSGP Part 3 and Part 6.2.5.2):
Document procedures for performing the types of inspections specified by this permit, including:
• Routine facility inspections(see 2021 MSGP Part 3.1)and;
• Quarterly visual assessment of stormwater discharges (see 2021 MSGP Part 3.2).
Note:If you are invoking the exception for inactive and unstaffed sites proceed to 4.6.3 below.
4.6.1 Routine Facility Inspections.
Instructions(see 2021 MSGP Part 3.1):
Describe the procedures you will follow for conducting routine facility inspections in accordance with Part 3.1 of
the 2021 MSGP. Document any findings of your facility inspections and maintain this report with your SWPPP as
required in Part 6.5 of the 2021 MSGP. Summarize your findings in the annual report per 2021 MSGP Part 7.4.
Any corrective action required as a result of a routine facility inspection must be performed consistent with 2021
MSGP Part 5.
Identify storage areas, solid waste containers and each structural stormwater control device and
the frequency of inspections weekly. Review inspection programs.
• Tanks and Containers
• Solid Waste Containers
For routine facility inspections to be performed at your site, your SWPPP must include a description of the
following:
1. Person(s) or positions of person(s) responsible for inspection. James Baity, Human
Resources/Safety/Health Manager
Note:Inspections must be performed by qualified personnel with at least one member of your stormwater
pollution prevention team participating. Inspectors must consider the results of visual and analytical
monitoring(if any)for the past year when planning and conducting inspections. Qualified personnel are
those who possess the knowledge and skills to assess conditions and activities that could impact
stormwater quality at your facility, and who can also evaluate the effectiveness of control measures.
2. Schedules for conducting inspections, including tentative schedule for facilities in climates
with irregular stormwater discharges. Weekly
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Stormwater Pollution Prevention Plan(SWPPP)
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Note: The qualified personnel must conduct inspections at least quarterly(i.e., once each calendar quarter),
or in some instances more frequently(e.g., monthly). Increased frequency may be appropriate for some
types of equipment,processes and stormwater control measures, or areas of the facility with significant
activities and materials exposed to stormwater.At least once each calendar year, the routine inspection
must be conducted during a period when a stormwater discharge is occurring.
3. List areas where industrial materials or activities are exposed to stormwater. Steel storage
yard and above ground diesel tank.
4. List areas identified in the SWPPP (section 1 of the SWPPP Template) and those that are
potential pollutant sources (see Part 6.2.3). Ground diesel tank.
5. Areas where spills and leaks have occurred in the past three years. None.
6. Inspection information for discharge points.
Point Number Description Latitude Longitude
1 18"CMP at Buffalo Shoals Rd &Slingshot Rd 35.7708717148 -80.9087457772
2 FES @ Rip Rap ditch to railroad 35.7703153855 -80.9047742503
3 Curb Inlet in Cochran St 35.7714516535 -80.9035409546
4 Sediment basin 35.7708719597 -80.9029950546
5 Road ditch on Slingshot Rd @ railroad 35.7686701789 -80.9085887368
6 36"steel pipe @ railroad 35.7691954183 -80.9076560569
7 Railroad ditch southeast corner 35.7709052951 -80.9023316450
8 Sediment basin @ Winston Ave 35.7685220298 -80.9061701182
7. List the control measures used to comply with the effluent limits contained in the 2021
MSGP. ANALYTICAL RESULTS DO INDICATE THAT ADDITIONAL MEASURES ARE REQUIRED.
8. Other site-specific inspection objectives. None.
4.6.2 Quarterly Visual Assessment of Stormwater Discharges.
Instructions(see 2021 MSGP Part 3.2):
Describe the procedures you will follow for conducting quarterly visual assessments in accordance with Part 3.2 of
the 2021 MSGP. The visual assessment must be made:
• Of a discharge sample contained in a clean, colorless glass or plastic container, and examined in a well-
lit area;
• Of samples collected within the first 30 minutes of an actual discharge from a storm event. If it is not
possible to collect the sample within the first 30 minutes of discharge, the sample must be collected as
soon as practicable after the first 30 minutes and you must document why it was not possible to take the
sample within the first 30 minutes. In the case of snowmelt, samples must be taken during a period with a
measurable discharge;and
• For storm events, on discharges that occur at least 72 hours(three days)from the previous discharge.
The 72-hour(three-day) storm interval does not apply if you document that less than a 72-hour(three-
day) interval is representative for local storm events during the sampling period.
Document the results of your visual assessments and maintain this documentation onsite with your SWPPP as
required in 2021 MSGP Part 6.5.Any corrective action required as a result of a quarterly visual assessment must
be performed consistent with 2021 MSGP Part 5.
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Stormwater Pollution Prevention Plan(SWPPP)
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Make the assessment of a stormwater discharge sample in a clean, colorless glass or plastic container,
and examined in a well-lit area; Make the assessment of the sample you collected within the first 30
minutes of an actual discharge from a storm event. If it is not possible to collect the sample within the first
30 minutes of discharge, the sample must be collected as soon as practicable after the first 30 minutes,
and you must document why it was not possible to take the sample within the first 30 minutes. In the case
of snowmelt, samples must be taken during a period with a measurable discharge; and for storm events,
make the assessment on discharges that occur at least 72 hours (three days)from the previous
discharge. The 72-hour(three-day) storm interval does not apply if you document that less than a 72-hour
(three-day) interval is representative for local storm events during the sampling period. Visually inspect or
observe for the following water quality characteristics, which may be evidence of stormwater pollution:
Color; Odor; Clarity (diminished); Floating solids; Settled solids; Suspended solids; Foam; Oil sheen; and
Other obvious indicators of stormwater pollution. Whenever the visual assessment shows evidence of
stormwater pollution in the discharge, you must initiate the corrective action procedures.
For quarterly visual assessments to be performed at your site, your SWPPP must include a description of
the following:
1. Person(s) or positions of person(s) responsible for assessments.
James Baity, Human Resources/Safety/Health Manager
2. Schedules for conducting assessments. STORM EVENTS AT LEAST QUARTERLY.
3. Specific assessment activities. See 4.6.2.
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Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc.June5,2024
4.6.3 Exception to Routine Facility Inspections and Quarterly Visual
Assessments for Inactive and Unstaffed Sites.
Instructions(see 2021 MSGP Parts 3.1.5 and 3.2.4.4):
If you are invoking the exception for inactive and unstaffed sites relating to routine facility inspections and/or
quarterly visual assessments,you must include documentation to support your claim that your facility has changed
its status from active to inactive and unstaffed.
To invoke this exception you must maintain a statement in your SWPPP per Part 6.2.5.2 indicating that the site is
inactive and unstaffed, and that there are no industrial materials or activities exposed to precipitation , in
accordance with the substantive requirements in 40 CFR 122.26(g)(4)(iii).The statement must be signed and
certified in accordance with Appendix B, Subsection 11.
Note:If circumstances change and industrial materials or activities become exposed to stormwater or your facility
becomes active and/or staffed, this exception no longer applies and you must immediately resume routine facility
inspections. If you are not qualified for this exception at the time you become authorized under the 2021 MSGP,
but during the permit term you become qualified because your facility becomes inactive and unstaffed, and there
are no industrial materials or activities that are exposed to stormwater,you must include the same signed and
certified statement as above and retain it with your records pursuant to Part 6.5.
Inactive and unstaffed facilities covered under Sectors G (Metal Mining), H (Coal Mines and Coal Mining-Related
Facilities), and J (Non-Metallic Mineral Mining and Dressing)are not required to meet the"no industrial materials
or activities exposed to stormwater"standard to be eligible for this exception from routine inspections, per 2021
MSGP Parts 8.G.8.4, 8.H.9.1, and 819.1.
❑ This site is inactive and unstaffed, and has no industrial materials or activities exposed to stormwater,
in accordance with the substantive requirements in 40 CFR 122.26(g)(4)(iii)as signed and certified in
Section 7 below.
If you are invoking the exception for inactive and unstaffed sites for your routine facility inspections and/or
quarterly visual assessments, include information to support this claim.
None.
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Stormwater Pollution Prevention Plan(SWPPP)
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4.7 Monitoring.
Instructions(see 2021 MSGP Part 6.2.5.3):
Describe your procedures for conducting the six types of analytical stormwater discharge monitoring specified by
the 2021 MSGP,where applicable to your facility, including:
• Indicator monitoring (2021 MSGP Part 4.2.1):
• Benchmark monitoring (2021 MSGP Part 4.2.2 and relevant requirements in Part 8 and/or Part 9);
• Effluent limitations guidelines monitoring (2021 MSGP Part 4.2.3 and relevant requirements in Part 8);
• State-or tribal-specific monitoring (2021 MSGP Part 4.2.4 and relevant requirements in Part 9);
• Impaired waters monitoring (2021 MSGP Part 4.2.5);and
• Other monitoring as required by EPA(2021 MSGP Part 4.2.6).
Depending on the type of facility you operate, and the monitoring requirements to which you are subject,you must
collect and analyze stormwater samples and document monitoring activities consistent with the procedures
described in 2021 MSGP Part 6 and Appendix B, Subsections 10—12, and any additional sector-specific or
state/tribal-specific requirements in 2021 MSGP Parts 8 and 9, respectively. Refer to 2021 MSGP Part 7 for
reporting and recordkeeping requirements. Note: All monitoring must be conducted in accordance with the
relevant sampling and analysis requirements at 40 CFR Part 136. Include in your description procedures for
ensuring compliance with these requirements.
If you are invoking the exception for inactive and unstaffed sites for benchmark monitoring,you must include in
your SWPPP the information to support this claim as required by 2021 MSGP Part 6.2.1.3.
If you plan to use the substantially identical discharge point exception for your benchmark monitoring
requirements, impaired waters monitoring requirements, and/or your quarterly visual assessment, you must
include the following documentation:
• Location of each of the substantially identical discharge points;
• Description of the general industrial activities conducted in the drainage area of each discharge point;
• Description of the control measures implemented in the drainage area of each discharge point;
• Description of the exposed materials located in the drainage area of each discharge point that are likely
to be significant contributors of pollutants to stormwater discharges;
• An estimate of the runoff coefficient of the drainage areas(low= under 40%; medium =40 to 65%; high =
above 65%); and
• Why the discharge points are expected to discharge substantially identical effluents.
Check the following monitoring activities applicable to your facility:
❑ Indicator monitoring
❑x Benchmark monitoring
❑ Effluent limitations guidelines monitoring
❑ State-or tribal-specific monitoring
❑ Impaired waters monitoring
❑ Other monitoring required by EPA
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Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc. Junes,2024
For each type of monitoring checked above, your SWPPP must include the following information:
Select type of monitoring activity from drop-down list below (if subject to more than one type of
monitoring activity, you will need to copy and paste the items below for each monitoring activity):
Click here to select monitoring activity type
1. Sample location(s). See 4.6.1.6
2. Pollutants to be sampled. See Analytical Report
3. Monitoring Schedules. See 4.6.2
4. Numeric Limitations. None.
5. Procedures. See 4.6.2
Note:it may be helpful to create a table with columns corresponding to# 1 -5 above for each type of
monitoring you are required to conduct.
Exception for Inactive and Unstaffed Facilities (if applicable)
❑ This site is inactive and unstaffed, and has no industrial materials or activities exposed to stormwater,
in accordance with the substantive requirements in 40 CFR 122.26(g)(4)(iii)as signed and certified in
Section 7 below.
Exception for Substantially Identical Discharge Points(SIDP) (if applicable)
If you plan to use the SIDP exception for your quarterly visual assessment requirements in 2021 MSGP
Part 3.2.4 or your indicator, benchmark, or impaired waters monitoring requirements in 2021 MSGP Parts
4.2.1, 4.2.2, and 4.2.5, respectively, include the following information here to substantiate your claim that
these discharge points are substantially identical (2021 MSGP Part 6.2.5.3.d):
• Location of each SIDP: INSERT TEXT HERE
• List the general industrial activities conducted in the drainage area of each discharge point:
INSERT TEXT HERE
• List the control measures implemented in the drainage area of each discharge point: INSERT
TEXT HERE
• List the exposed materials located in the drainage area of each discharge point that are likely to be
significant contributors of pollutants via stormwater discharges: INSERT TEXT HERE
• An estimate of the runoff coefficient of the drainage areas (low = under 40%; medium =40 to 65%;
high = above 65%): INSERT TEXT HERE
• Why the discharge points are expected to discharge substantially identical effluents: INSERT TEXT
HERE
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Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc. Junes,2024
SECTION 5: DOCUMENTATION TO SUPPORT ELIGIBILITY
CONSIDERATIONS UNDER OTHER FEDERAL LAWS
5.1 Documentation Regarding Endangered Species Act (ESA) Listed Species
and Critical Habitat Protection.
Instructions (see 2021 MSGP Part 6.2.6.1):
Include any documentation you have that supports your determination of eligibility consistent with 2021 MSGP,
Part 1.1.4 (Eligibility Related to Endangered Species Act(ESA) Listed Species and Critical Habitat
Protection). Refer to Appendix E of the 2021 MSGP for specific instructions for establishing eligibility.
None.
5.2 Documentation Regarding National Historic Preservation Act (NHPA)-
Protected Properties.
Instructions(see 2021 MSGP Part 6.2.6.2):
Include any documentation you have that supports your determination of eligibility consistent with 2021 MSGP
Part 1.1.5 (Eligibility related to National Historic Preservation Act(NHPA)-Protected Properties). Refer to 2021
MSGP,Appendix F for specific instructions for establishing eligibility.
None.
SECTION 6: CORRECTIVE ACTIONS AND ADDITIONAL
IMPLEMENTATION MEASURES
Instructions (see 2021 MSGP Part 5):
Describe the procedures for taking corrective action and/or AIM response in compliance with Part 5 of the 2021
MSGP.
None.
EPA Industrial SWPPP Template, February 25,2021 23

Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc.June5,2024
SECTION 7: SWPPP CERTIFICATION
Instructions(see 2021 MSGP Part 6.2.7):
The following certification statement must be signed and dated by a person who meets the requirements of
Appendix B, Subsection 11.A,of the 2021 MSGP.
Note:this certification must be re-signed in the event of a SWPPP modification in response to a Part 5.1 trigger for
corrective action or a Part 5.2 AIM triggering event.
I certify under penalty of law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gathered and
evaluated the information contained therein. Based on my inquiry of the person or persons who manage
the system, or those persons directly responsible for gathering the information, the information submitted is,
to the best of my knowledge and belief, true, accurate and complete. I am aware that there are significant
penalties for submitting false information, including the possibility of fine and imprisonment for knowing
violations.
Name: M. W. McCombs, III Title: President
Signature: -AW � Date: June 5, 2024
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Stormwater Pollution Prevention Plan(SWPPP)
McCombs Steel Company, Inc. Junes,2024
SECTION 8: SWPPP MODIFICATIONS
Instructions (see 2021 MSGP Part 6.3):
Your SWPPP is a"living"document and is required to be modified and updated, as necessary, in response to
corrective actions and deadlines. See Part 5 of the 2021 MSGP.
• If you need to modify the SWPPP in response to a corrective action required by Part 5.1 or AIM required
by Part 5.2 of the 2021 MSGP,then the certification statement in section 7 of this SWPPP template must
be re-signed in accordance with 2021 MSGP Appendix B, Subsection 11.A.
• For any other SWPPP modification,you should keep a log with a description of the modification, the
name of the person making it,and the date and signature of that person. See 2021 MSGP Appendix B,
Subsection 11.C.
SECTION 9: SWPPP AVAILABILITY
Instructions(see 2021 MSGP Part 6.4):
Your current SWPPP (with the exception of any confidential business or restricted information) must be made
available to the public. You have three options to comply with the public availability requirements for the SWPPP:
attaching your SWPPP to your NOI; providing a URL of your SWPPP in your NOI; or providing the following
SWPPP information in your NOI:
• Onsite industrial activities exposed to stormwater, including potential spill and leak areas;
• Pollutants or pollutant constituents associated with each industrial activity exposed to stormwater that
could be discharged in stormwater and/or any authorized non-stormwater discharges;
• Stormwater control measures you employ to comply with the non-numeric technology-based effluent
limits and any other measures taken to comply with the water quality based effluent limits; and
• Schedule for good housekeeping and maintenance and schedule for all inspections.
SWPPP ATTACHMENTS
Attach the following documentation to the SWPPP:
Attachment A — General Location Map
Include a copy of your general location map in Attachment A.
Attachment 8— Site Map
Include a copy of your site map(s) in Attachment B.
Attachment C—2021 MSGP
Note:it is helpful to keep a printed-out copy of the 2021 MSGP so that it is accessible to you for
easy reference. However, you do not need to formally incorporate the entire 2021 MSGP into your
SWPPP. As an alternative, you can include a reference to the permit and where it is kept at the
site.
EPA Industrial SWPPP Template, February 25,2021 25

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13 t�11 1"=500 ft
Tax Map Information Print map scale is approximate.
•PIN 4734405787.000 Critical layout or measurement
•Address 1025 COCHRAN ST
•Account# Acct77417085 activities should not be done using
•Tax Owner BUFFALO SHOALS PROPERTIES this resource.
•Mailing 117 SLINGSHOT RD
Address MAP FOR REFERENCE ONLY
• STATESVILLE,NC 28677 NOT A LEGAL DOCUMENT
•GIS Owner BUFFALO SHOALS PROPERTIES FAMILY
LTDP Iredell County,North Carolina makes no claims and no
•Deed Info 2439/854-WD-20160818 warranties,expressed or implied,concerning the validity or
•Tax Acres 26.859 AC accuracy of the GIS data presented on this map.
•Lot# Geometry updated 06/05/2023
• BUFFALO SHOALS PROPERTIES FAMILY Data updated 06/05/2023
Description LTD PB54-117
•Zoning HI
•Old Parcel 0206E000OOB112
•Bldg Value $2,016,600
•OBXF $55,220
Value
•Land Value $389,460
•Total Value $2,461,280
Defer $0

I-40 936 936
100.00VC 100.0 VC
14.27K-Val 24.91-Val
CRE7 STA.-1+16. .. m
v ry CRE7 ELEV.-925.3 - in
N y o+o, The drive will have to be paved 50ft back from the edge of pavement.
¢� No Min.pavement structure:
uu Gw Gw
vy E rs (/ 928 a d ¢> 55 dd 55 928 1.5 inches Bituminous Concrete Surface Course-Type 59.5C /
S $ (�� w 2.5 inches Bituminous Concrete Binder Course-Type I19.00
Y 64,1 0 a 4 inches Black Base-Type B25.00 or 8 inches or ABC stone /
-2 1 SIGHT
TRIANGLE
70 _RAW C'1
STOPS R=30 �.
BUFFALO SHOALS RD, oo SAG STA. +97.49 _EXISTING _ Q
SAG ELE .924.50 ROAD
JOy US HWY 70 920 Nv.m=919. +� 920 a
ys / 6o LF NFw s'CMP a PROPOSED DRIVEWAY CONNECTION
sT °N I SITE I-77 INV.OUT=91.70 G w BUFFALO SHOALS ROAD %%%! Qa\ `s
Slingshot
�//
Rel.9 / J // / \ ��♦� \ �\ PIN: 4734610300
/ I (H): 1'=80 �'/ rf Q� \G�°/\ TOHE PIEDMONT,INC.
YS+GIRLS CLUBS F
V : 1"=8 D.B. 1933, P . 227
912 ( 912 /�/ / �O \
G 3
\ ZONED: R-5MF
CD / S -0+80 -0+30 0+20 0+70 1+20 1+70 2+20 2+70 3+20 / //// / ���.�6 ss \
\ o �� / , // PROPOSED DRIVEWAY PROFILE � °� ,ll�r/%/� ,���.0
, / ��'
-21
1212 /,/- / I 1 // ' PIN: 4734418689
0
s/QOLK INDUSTRIA I STATESVILLE H05 SPG 9 4 RITY � � f j�
\ 6 PORTFOLIO,LL 11 I I P.B. 11, PG. 5 I o : IIoQ��
p A 6 Q / D.B. 2867, PG. 958 / - // / /� / 1 ZON D: R-5M I \ / I ) I I�l`%// / Q�� C•�� 3 a \ 9,? \
A/ F i / ° /ll ( 1 I v I / �/III %�� \�
'r ,A / ZONED: HI l
�o. _ 4 �\
Q/(� '� a� �F <<c0 / X 1 7 \ c✓ j � \ \\� \ ^\ ���� �� \ \ \ � � � _� � � Zi //�� \� rl / QJ `I�il QCo �\ 7 \ S 'p
OQ tv S 870 39' 7.T C)
��
o ��o° o \ ! ^�" C I�G "La" ��✓�/������/�..�� ��/\✓ v •i <��� o �P5 \ 1 l �\ X
`�-°' 9� � �� 11
Q. \ 1,937 S� Tc. REMAIN ✓��\�i��✓��\/-�\/ \ �>�; t ./ �1�, ,�C� � \ �\
/ / I DR INAGr AREA 3� RCS
o��o PIN:4734412174 / �z rV l' I h ( STORAGE
,y / \ / �l NTEN NCE SHOP& YA D
\ \\ 1 BRENDA D.CALDWELL
il� D.B. i294, f• DI CHARGEST CURB LET IN I I
Pam.46, 4,, Q C�CHRAN STY
EET,C OF STATESVILLE 1 \ Q V A �� V� /,,� •'��
ZONED: HI 11 AM E P\IN
/ S4,WHIC DISCHI RGES TO UNNAMED I D15�HA GE/5 0 / \
�3 x / \\\�\\� / N m y F / / THIRD I I C INLET IN CO HRA SIRE r O 1�
PIN: 4734415142 r� /// ( I f
/ TRI TA TO IRD CREEK SCN0612 OF A VILLE M 4, �o 1 L �(/1 \ A \ VAS N
BUFFALO SHOALS PROPERTIES b o / ' /&D CNO 13,DSCNo614, 0615, I a =o / DSCN0616 PRESSURE MANIFOLD I LAIIIpID 35.7R145 ' \ / v^FAMILY, LP ° 250 GAL w / / } LONG71) -80.e03�409546 r =\ \ PIN: 4;34518145\� ` D.B. 2740,PG. 984 lo. Bl1FFALO SHOALS•PROPERTIES
\\� r� DIESEL TANK PIN: 473441)5787 / f '�� / / / 8,6� �� A,/ (
DISCHARGE/SAMPLE POINT 1 / ° ) \\\\\ ZONED: HI WITH 36 CF - FAMILY, LTG.
LATITUDE 35.7708717148 ` \�\\\ ` �/ J j BUFFALO SHOALS PROPERTIES / / i I F ~ �\ L' D.B. 3034, PG. 1551 \ ' �_ � `LONGITUDE-80.9087457772 / \ \ 6 \ CONTAINMENTl \ S FAMILY, LTDP / / l V "7 t`�9 - \< A / \`�, },\\ / ` ` 'U _ \ ZONED: R-5MFD.B. 2139 PG. 854 / 9 S V/ \ SS SS �t -- S \ ` ` �/� j /CCC- \ J ( � / - N t 5a,6 , 4734616089 /rL..
CFI/S7 DRAINAGE AREE!1(4.68 ACRF�S) \\\\\\\\ ��1. o I 24�. S3„ ( P.B. 54, PG. 117 / 1 -SS_�� L- rs - \�oO \ \ ,�/ �/ I/ )I 1 �• �% _j/� v \ -{ h`:A M. GARDNER
/ MPLOYEE DRIV NORTH SIDE CH& \\� `/� F / ZONED: HI SS4�_ � \ 1 ` //////
'yq ti Q Pv �T \\\ 'Q to __SS
SMISSION LINE -f' eP� \ g \ \\ / - r // ;.r• O / \ \
N G X \ �\ _ s� - p / / J /�ii D.B. 2997, PG. 2400
J'MFQ /TC l� ki 18"CMP CULVERDTNDERGBUFFALd V- N ~� v """" 1 I -� /s� // l/• �� �C .G y "� \\ ZONED: HI /
5 \ POWER OVERHEAD �, pQ >�� `�
SHOA ROAD AT SLINGSHOT ROAD \ r W }JI / / - / 1 •\', \
RAGE WHICH ISCHARGESO UNNAMED\ \ - I /� `f ( /{� �' \ DUKE i� \ \ >�I �/ i/ ���`I �� G�' ^: 4-.
ORA 4
FF qRY T r!ARGESH " Cl v --TRIBUTARY TO THIRD CREEK
R T / FROM ST ERT \ �j T /^r CMP �
/( TO 607 \ `
O D N66o6,�scNo J - V I LINE I
oTo� &DSCN06 _ \ / ss TF:ANSMISSION \ yam; /�� l(��_ - /
DSCN0608 DI#1 _ � \� _ _ - �������� /�i
- - OVERH � \
LATITUDE35.77087171 RIM=925.00 - _ _ - - _ DUKE POWER \ \ \
ct� LONGITUDE-80.9087457772 mv.ou =922.00 \ / / /
A as LF la°CMP _ c� N UNE - _ I \ \ -
HEI� rRgNSM1��10 - / DRAINAGE AREA Z�5.54 ACR
/ .OUT�21.0�� 19 V :-CHARGE/SAMPL DINT 4
' }FES. 4�� R RAGEARISDISCHARGES O \ I / r�`� - \ y. / �L/- SE MENT BASIN W i I RGE AMPLEpp� yj
DUKE POWER �� 111 \ I_ - \ / TI DE35.7 087 ~E �� DI-1, 5 6,& D. 2 INV. - \ T
II S D.B. �, _ _ - - - II. OA CH
/ I LINE ENT _Wk#I H DISCHARGES AT FES TO RI 17.42 9l1.01 _ ONGIT E-80.90 0. LA ITUDE 35.J�0 /
I POWER \ CHA NEL T H _ INV. IN 914. (24" F;CP) (18" G 'ffiNA GS AR 4(4. 4 ACRES) / _ //2�//j OJNGITUD 6450
SIFl� gSICiN// MED TRIB ARY TO THIRD REEK UTZ 4.41 (24=RCP �E}.� - •I _ - - - - AG YAR DISCF� G S TO _ � �j \y' ` ./j / j�NO WIDTH MI E -� - / / / SEDIMENT BASIN -// � �TRpNs /�A/D-SCN0610&D3CN0611 s RIM. 918.04 \ ME T BAS WWW��CH�SCMARGE i ( /� / ' >( /
W OVER "y _ ! V. 9 5.02 (18" RCP �QJU SEC-ON OVERLAND TO/ \
DUKE PO Q V,,�( _ � _ 'r uI�NAMED TRI UTARV TOTH1 IRD CREEK/ /
FIR HYD�NT A `G - - SS �DI-3 l \ D CN0617
z - / SS� �� WV. IN 985.45 (2 RC $@�� 010.19
� I- f`- ASS _���� SS O ) �� INV. IN915.70 (2." RCP)\ i/ / _ _ -/
+ -SSA ___1�4 i \ v �� INV. OUT? 916.4 (18'" RCP .� - - - _ _ _ -� /
V -SS S I _\ "'" * -DI-4 D-I-1 /f l T
1)B.TFF6I ST PT SS c c'�` '_ 0 RIM. N/A
O DS�CN060 (J rc�'"' ^\ � � INV. IN 916.81 (18" RCP, RIM. 916.70
906
F° I o SS N ERGRDl1N11 E:LE'C7RIC LINE I �,(\ INV. IN 906.44 (24" RCP)
GROUND ELECTRIC LIE ��E- r,�TR U UE---UE SDI-5 / ` +! INV. IN 916.92 (18" RCP, ) INV. OL'T 906.54 (24" RCP) �'*
(,sj 1RR UL----UE- - RIM. 926.87 �� INV. OUT 916.75 (24" RC ) - - ♦ r I / / - �/, / \ \
♦
UE
_
DI#3 DI 4 �7 UK DI#5
LF 15 C P RIM=926.50 ` _- - v. (*2
EMPLOP Y�E DRIVE�2'=EMS; �M=926.50 DI#2 �1 LF =9'�.5� INv.olrf=92.00 I /I
/
I �•_ INV. 0"� 8g8e47 4" RC
INV.OUL=923.54 INV.OUT=923.54 `DISC RGE(SA Z `�- /
�- ---1 III---
0- �LF 15"C- RIM=926.5 3.28 ,� j I \ S TO RIP - 1_RO ITCH
/ J INV. T= 7 ,
rr 9za.ao ,V TITUDE 3
I / I o ` �IPHA _ v' 81 LF 8"HOPE 0.00-F DRNN ,�' ,✓� I I I L(pNGIT' A/ 503
/ / /
Lu I r 168 LF 8"HDPE ROOF D0.AIN INV.=923.58 ! .I :-•.`•
` \ / DUST CONTROL
H-I I '' DRAINAGE AREA 5(3.04 A�� I �' S,�\ �� l 1 \ / / / / I 1 '2v���`/ ' r 1 �/
a \ / .T 0o.
�+ F- z HALF OF MAI BUILDING, 03 E€ /
N u, I �� \ / cs l 1 i
PARKING LOT OUfH OF I / AREA (s. 4 c > �''\` The operator will maintain the facility with gravel or aggregates to control any dust that will be generated from trucks
x I' I Brick 1 J' �` s \ ' � ` // J -
I I EM E EHOUSE,& O /�/ //// YARD IS G TO t
IVE °rube s�q - coming in and out of the property. If an debris falls onto the road from an vehicles entering the roe It will be
� ® CONCRETE i/' /1j '/i0 J \ // � , I- DI/3,DI�4, z! s r DI-7i 9 P P Y• Y Y 9 property ttY
J / / promptly removed either by hand or with equipment if needed. If these management practices are ineffective water spray
I V. 9 1 0'�I DISCHARGES TO 18"RCP C / C�DI CHA ES�T FE Ti-To_ RP.P:• /
I I UNDER TRUCK DRIVE TO R RAP PROPOSED OFFICE ADDITION / _ ////// IOANNEL/TO/ I OAD1,,.�I�{CWTO-- 2 will be used to control generated dust. In addition, if necessary, '
Q m QI I ---ill CHANNEL TO RAILROAD DI H TO 2,651 SF DRILL uL " _�/� i// / NNA Ell T R}7 ly 7r RIS.CREEK I - /
i I I UNNAMED TRIBUTARY TOT RD CREEK Metal OPEN SHED &BLASTE u SAW BUILDING =/�J//�SC ,a �/( /J / 5 / g ry, calcium chloride shall be applied in accordance with the
17,130 SF EXISTING 2 83,4 SF EXISTING / I 016 o DseN 1// /� a / following specifications:
KI ' I DSCN0621&DSCN0622 Bullciln9
SEE PERMIT #2_��195 DI-6 /j - / /// lr����/ /� �a r /
9 a r I I BUILDING"A" SEE PERMIT #222195 ' / J / \\r / Calcium chloride absorbs water vapor from the air and liquid water from the road bed. At 77 F and 75% humidity, for
�� RIM 923.57 �. /// / `%J i
INV. IN ^ �.42 (18" \�� �G / example, it absorbs more than twice its weight in water. In addition, calcium chloride solutions attract more moisture to
°I
° -1141 # 117 SLINGSHOT RD. �� Rr / / the road than they give p In evaporation.
N �00 I ^:V. OUT 910.35 (24" •� //�J ` �/r��/i /
��I i��� PIN• M.GA 6 N
EXISTING 1 STORY METAL WAREHOUSE � �`v.J �j� / / TONYA M.GARDNER e v u �I
EXISTING
1 AREA: 47,765 sq. ft• '��s �;� p/ f/ /// / //' r �O / D.B. 2997, PG. 2400 The road remains dense and compact under almost any level of traffic because calcium chloride keeps materials on the
BLD �� n ///// 1� ii ���, ZONED: HI road by keeping moisture in the road, even under a burning sun on a sweltering day.
C71�I �DI-7 I �DRAI4AGEA 5� /�eI� J i% f'C �/ / Calcium chloride is generally sprayed as a 35% solution using a tank truck with a rear- mounted distribution bar that
�'� I mw�l Concrete Pad RI�s2s.s7 - �RAGEL DISCHARGE spreads the liquid evenly over the road. One pass will cover an 8-to 12-foot-wide road. Two passes are needed on roads
M a-' J I IL D° PJrJAf^E�/ 16 to 18 feet wide.
ncrete Pad ` / TIBu T REFI<Ds+-NeSzs
�/j/jam\ / ram/ As soon as calcium chloride enters a road, it's attracted to negatively charged soil particles, such as clays, which help
L I _I ` �ii/�// i/�„pC / i / resist leaching. Calcium chloride may move deeper into the base during wet weather but will rise toward the surface
3, -n rn � ��i � / o /� / � 9• Y P 9
_DRAINAGE AREA 6(1.25 ACR,�}-SOUTH / during dry spells.
i0 II 0 / HALF OF MAIN Bel ILDINGA TRUCK LOT
3 O C /i j/ i
u, I O N r DISCHARGES TO YARD INLET THROUGH ) a�i�/� -/ �// �/ i/ ��i An unpaved road stabilized with calcium chloride retains a smooth dustless surface. The moisture retained keeps the
M 36"STEEL PIPE TO RAILROAD DITCH TO
o I I n, rn -uNNAMEDTRIBuTAR�To-rHIRD�REEK /////ice / l L - �/ , �//j�i r / / surface plastic enough so fines can migrate into gaps formed between aggregates under the varying pressure of car and
o UJI X / DSCN0620 //j//// r ��
� Z I !,,I•o I/ / v /, � � �/ , / �/ truck traffic. In short, calcium chloride does the following:
o I I reduces the amount of gravel needed in construction and maintenance
I ) ///, r>>// /- rk S• LEGEND:
extends the service life of the gravel-wearing course, decreasing blading and shaping
Z \ �- G/%//�j�/�/✓ { �� w S 6�j 1 �, LSg° / �� serves as a viable cost-effective alternative to an asphalt surface treatment
7-- 9 LINE BEARING DISTANCE EIP-EXISTING IRON PIN
/DISC f�l f 6 / �� 6 2 'c controls dust and reinforces stabilization
/ �1_ °3 �� / ° \ Ll N 450 24 32 E 81.00 IPS-IRON PIN SET
3e' RA�LRO7CD�IT��1 � 5 0 �� PIN: 4734408333 helps improve roads when used over time.
3 I /
�4.i u::rI T 7691 4183 /ii w r N F �� / L2 N 490 11'42" E 112.72' INV INVERT
12" DPE 14 DIP1 ��q / Ir N �S iv MARGARET S. MARKS
C RIM=92o.00' / / I_O"JGIT E-so.9o76 0�/// .� r� \ / yl L3 N 520 19' 16" E 104.27' NTS NOT TO SCALE
45 D_G B N �� {S IIV�=912.00' / i- n N D.B. 781, PG. 1 -RIGHT OF
INV=9 N� C / J/ f PIN: 4734403175 r� ` ZONED: HI - L5 S 400 52' 14"E 29548 CBW-CATCH BASIN AY
/ME r FtWNPad L6 N 26 28'22"E 40.00'
S� !� ie�e BUFFALO SHOALS PROPERTIES CI CURB INLET
c FAMILY, LTDPL7 S 480 00'41"W 18.33' CM -CONTROL MARKER
\\ I �y--'�J`1j� t�ON\\v� -✓// / i/�/ / D.B. 2473 PG. 1907 a CO -SEWER CLEANOUT
/ L8 S 440 15'58"E 100.08'
/ / �� �// / / / ZONED: HI ( � -- �` L9 N 84°42'51"E 221.0 ATTACHMENT B
I I ��I F!� ( �✓ J/ �/ / r'� / o� / L10 S 67°48'S2"W 221.06' DI -DROP INLET
8 5\q „ v ///i / i / / / / 0 3`� l - o OPL-OVERHEAD POLWER LINE
DISCHARGE/SAMPLE POINT 5 \ �R�*i� I* �.�� ///�/ � / y® � / 50 - � -� / L11 S 71 38'00"W 73.19'
RIP RAP CHANNEL TO RAILROAD DITCH pv�N 0� QC• ,- / �i�i/ // / / ! �� / / DRAII�IAGEf!REA 8.(3.4q ACRs) of rH*, / - ° RCP-REINFORCED CONCRETE PIPE
- F P/ L1Z S 80 12'02"W 74.26'
LATITUDE 35.7686701789 RyFFAIL O FICE/SHO ,DR E /-
1 ARKING,8VSTORAU`E THR uGH - ° CMP CORRUGATED METAL PIPE
LONGITUDE-80.9085887368 �• ///�� / �p / (n o L13 S 88 42'O1"W 74.54'
SEgIMEI�T BASIN T NIvA ED / ° -- L14 N 830 24'S7"W 83.73' HDPE HIGH DENSITY POLYETHYLENE PIPE
Ftai!road Spur / T IB ARY O D CREE SCW623 � - o
/ P( L15 N 73 3T 13"W 352.58' ST -SEPTIC TANK
�� � - -' L16 N 020 54' 15"W 38.10' TP TELEPHONE PEDESTAL
L17 S 03 44'38" E 57.12'
/, Co�cCeY di C \ I - TR POWER TRANSFORMER
/ l; /� -' CURVE ARC LENGTH RADIUS DELTA ANGLE CHORD BEARING CHORD LENGTH WV -WATER VALVE Tota I Area .
Cl 70.62' 149.65' 27102'21" S 21°45'26" E 69.97' ® -WELL
C2 29.06' 20.00' 83014'59" S 060 23'48"W 26.57' O
0�����E� LIGHT POLE 36.937 Acres �Vvvvll�lCArr/�'/i7
Go�c<eteo m9 se f ,.\ / ` 0�0�� �Z\\ � -SEWER MANHOLE �� ,``` RDA
-UNMARKED POINT per Deeds
�, /r' v carK / C\n9 `(vOV OC`�C ��\,1�'�
/ N
° `'' I e ' / E'�!S V`lace �`• SEDIMENT BASIF; � P o -PROPERTY CORNER
xl w o<a� etav - 60 0 80 160 240 O
Ile
-_ �7 POWER POLE Q .
H �s�;M�ILE oI R �:.� ,!� / �j = = 33292 _
/ SEAL
dl� T f(S N WEIR \i ' v ,.�
= _
//LATIT DE 5.7685220298 - 1�.
ON UDE-80.90617r`•IK'2 F
, T/ / f 9J 'i,HGINE�%.`
/ °� ♦� / /i�// / - / JOB NAME: STORMWATER POLLUTION PREVENTION PLAN FOR Ty �Q.
MAP REVISIONS: FW
G
,tea FIRE _ ��, � ♦ ������ / -
/ InSt 11PA,rry McCOMBS STEEL COMPANY, INC. JORDAN
S R Iq�et7Ga a�2"DI\`TE �� 3 i .-- - � �
44 \\ � ' =°` ��'"/ LOCATION ADDRESS: 117 SLINGSHOT ROAD & DRAWN BY: SMS CHECKED BY: MIG
1474 WINSTON AVENUE
Sheet No:
STATESVILLE, NC 28677 SCALE: 1" = 80'
GRANT
3 6-3-24 NCDOT COMMENTS GVG OWNER: BUFFALO SHOALS PROPERTIES FAMILY LTDP DATE OF FIELD SURVEY: 04-03-23 JORDAN GRANT & ASSOCIATES, PLLC
2 5-20-24 OWNER COMMENTS GVG DATE OF MAP: 06-03-24 PIN NO: SHOWN P.O. BOX 151 * STATESVILLE, NC 28687 SWPPP
1 2-28-24 OWNER COMMENTS GVG DEED REF: SHOWN PRO] NO: 20210402 SWPPP 020724 [e-mail] [phone]
NO. DATE DESCRIPTION BY STATESVILLE TOWNSHIP---IREDELL COUNTY--- NORTH CAROLINA FIRM # P-1227

EXHIBIT D
Analytical Results /P�* STATESVILLE
ANALYTICAL
McCombs Steel
117 Slingshot Rd
Statesville, NC 28677
Receive Date: 01/09/2024
Reported: 01/18/2024
For: Stormwater
Comments:
Sample Number Parameter Sample ID Result Unit Method Analyzed Analyst
240109-15-01 COD 1 <20 mg/L HACH8000 01/10/2024 CL
240109-15-01 Copper 1 0.0057 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-01 Lead 200.8 1 <0.001 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-01 O&G SGT-HEM 1 <5.0 mg/L EPA1664RevB 01/15/2024 MT
240109-15-01 pH 1 5.29 Std. Units SM4500HB-2011 01/09/2024 LE
240109-15-01 TSS 1 36.45 mg/L SM2540D-2015 01/12/2024 LE
240109-15-01 Zinc 1 0.046 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-02 COD 2 <20 mg/L HACH8000 01/10/2024 CL
240109-15-02 Copper 2 0.0033 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-02 Lead 200.8 2 <0.001 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-02 O&G SGT-HEM 2 <5.0 mg/L EPA1664RevB 01/15/2024 MT
240109-15-02 pH 2 5.39 Std. Units SM4500HB-2011 01/09/2024 LE
240109-15-02 TSS 2 14.94 mg/L SM2540D-2015 01/12/2024 LE
240109-15-02 Zinc 2 0.026 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-03 COD 3 <20 mg/L HACH8000 01/10/2024 CL
240109-15-03 Copper 3 0.0062 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-03 Lead 200.8 3 <0.001 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-03 O&G SGT-HEM 3 <5.0 mg/L EPA1664RevB 01/15/2024 MT
240109-15-03 pH 3 5.65 Std. Units SM4500HB-2011 01/09/2024 LE
240109-15-03 TSS 3 60.76 mg/L SM2540D-2015 01/12/2024 LE
240109-15-03 Zinc 3 0.079 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-04 O&G SGT-HEM 4 <5.0 mg/L EPA1664RevB 01/15/2024 MT
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 1 of 12

Sample Number Parameter Sample ID Result Unit Method Analyzed Analyst
240109-15-04 COD 4 26 mg/L HACH8000 01/10/2024 CL
240109-15-04 Copper 4 0.021 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-04 Lead 200.8 4 0.0049 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-04 pH 4 6.74 Std. Units SM4500HB-2011 01/09/2024 LE
240109-15-04 TSS 4 236 mg/L SM2540D-2015 01/12/2024 LE
240109-15-04 Zinc 4 0.15 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-05 COD 5 <20 mg/L HACH8000 01/10/2024 CL
240109-15-05 Copper 5 0.022 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-05 Lead 200.8 5 0.0054 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-05 O&G SGT-HEM 5 <5.0 mg/L EPA1664RevB 01/15/2024 MT
240109-15-05 pH 5 8.56 Std. Units SM4500HB-2011 01/09/2024 LE
240109-15-05 TSS 5 117 mg/L SM2540D-2015 01/12/2024 LE
240109-15-05 Zinc 5 0.083 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-06 COD 6 <20 mg/L HACH8000 01/10/2024 CL
240109-15-06 Copper 6 0.037 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-06 Lead 200.8 6 0.0076 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-06 O&G SGT-HEM 6 <5.0 mg/L EPA1664RevB 01/15/2024 MT
240109-15-06 pH 6 7.81 Std. Units SM4500HB-2011 01/09/2024 LE
240109-15-06 TSS 6 726 mg/L SM2540D-2015 01/12/2024 LE
240109-15-06 Zinc 6 0.11 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-07 O&G SGT-HEM 7 <5.0 mg/L EPA1664RevB 01/15/2024 MT
240109-15-07 TSS 7 443 mg/L SM2540D-2015 01/12/2024 LE
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 2 of 12

Sample Number Parameter Sample ID Result Unit Method Analyzed Analyst
240109-15-07 COD 7 <20 mg/L HACH8000 01/10/2024 CL
240109-15-07 Copper 7 0.031 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-07 Lead 200.8 7 0.0053 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-07 pH 7 7.74 Std. Units SM4500HB-2011 01/09/2024 LE
240109-15-07 Zinc 7 0.089 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-08 COD 8 <20 mg/L HACH8000 01/10/2024 CL
240109-15-08 Copper 8 0.004 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-08 Lead 200.8 8 0.002 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
240109-15-08 O&G SGT-HEM 8 <5.0 mg/L EPA1664RevB 01/15/2024 MT
240109-15-08 pH 8 6.72 Std. Units SM4500HB-2011 01/09/2024 LE
240109-15-08 TSS 8 41.56 mg/L SM2540D-2015 01/12/2024 LE
240109-15-08 Zinc 8 0.031 mg/L EPA 200.8 Rev 5.4,1994 01/12/2024 MD
Respectfully submitted,
%'pZ�CL J 111�
Melissa Myers
NC Cert#440,
NCDW Cert#37755,
EPA#NC00909
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 3 of 12

Condition of Receipt
Sample Number 240109-15-01 Temp on Arrival: 3.7
pH on Arrival: <2 Parameter Schedule:
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Copper
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Lead 200.8
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: O&G SGT-HEM
Hydrochloric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: TSS
Received on Ice
pH on Arrival: <2 Parameter Schedule: COD
Sulfuric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: pH
Received on Ice
Sample Number 240109-15-02 Temp on Arrival: 3.7
pH on Arrival: <2 Parameter Schedule: Copper
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Lead 200.8
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule:
Nitric Acid Received on Ice
Chemicals in containers, lab
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 4 of 12

pH on Arrival: <2 Parameter Schedule: O&G SGT-HEM
Hydrochloric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: TSS
Received on Ice
pH on Arrival: <2 Parameter Schedule: COD
Sulfuric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: pH
Received on Ice
Sample Number 240109-15-03 Temp on Arrival: 3.7
pH on Arrival: <2 Parameter Schedule:
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Copper
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Lead 200.8
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: O&G SGT-HEM
Hydrochloric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: TSS
Received on Ice
pH on Arrival: <2 Parameter Schedule: COD
Sulfuric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: pH
Received on Ice
Sample Number 240109-15-04 Temp on Arrival: 3.7
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 5 of 12

pH on Arrival: <2 Parameter Schedule: Copper
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Lead 200.8
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule:
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: O&G SGT-HEM
Hydrochloric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: TSS
Received on Ice
pH on Arrival: <2 Parameter Schedule: COD
Sulfuric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: pH
Received on Ice
Sample Number 240109-15-05 Temp on Arrival: 3.7
pH on Arrival: <2 Parameter Schedule:
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Copper
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Lead 200.8
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: O&G SGT-HEM
Hydrochloric Acid Received on Ice
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 6 of 12

Chemicals in containers, lab
Parameter Schedule: TSS
Received on Ice
pH on Arrival: <2 Parameter Schedule: COD
Sulfuric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: pH
Received on Ice
Sample Number 240109-15-06 Temp on Arrival: 3.7
pH on Arrival: <2 Parameter Schedule: Copper
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Lead 200.8
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule:
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: O&G SGT-HEM
Hydrochloric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: TSS
Received on Ice
pH on Arrival: <2 Parameter Schedule: COD
Sulfuric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: pH
Received on Ice
Sample Number 240109-15-07 Temp on Arrival: 3.7
pH on Arrival: <2 Parameter Schedule:
Nitric Acid Received on Ice
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 7 of 12

Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Copper
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Lead 200.8
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: O&G SGT-HEM
Hydrochloric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: TSS
Received on Ice
pH on Arrival: <2 Parameter Schedule: COD
Sulfuric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: pH
Received on Ice
Sample Number 240109-15-08 Temp on Arrival: 3.7
pH on Arrival: <2 Parameter Schedule: Copper
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: Lead 200.8
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule:
Nitric Acid Received on Ice
Chemicals in containers, lab
pH on Arrival: <2 Parameter Schedule: O&G SGT-HEM
Hydrochloric Acid Received on Ice
Chemicals in containers, lab
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 8 of 12

Parameter Schedule: TSS
Received on Ice
pH on Arrival: <2 Parameter Schedule: COD
Sulfuric Acid Received on Ice
Chemicals in containers, lab
Parameter Schedule: pH
Received on Ice
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 9 of 12

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EXATTACHMENT A
Meritech, Inc.
Environmental Laboratory
Laboratory Certification No. 165
Contact: C.Little Report Date: 1/17/2024
Client: Statesville Analytical Project: McCombs
122 Court St
Statesville,NC 28677 Date Sample Rcvd: 1/9/2024
Meritech Work Order# 010924121 Sample: 240100-15-01 Grab 1/9/24
Parameters Results Analysis Date Reporting Limit Method
Oil&Grease-SGT HEM <5.0 mg/L 1/15/24 5.0 mg/L EPA 1664B
Meritech Work Order# 010924122 Sample: 240100-15-02 Grab 1/9/24
Parameters Results Analysis Date ReporUnCLimi Method
Oil&Grease-SGT HEM <5.0 mg/L 1/15/24 5.0 mg/L EPA 1664B
Meritech Work Order# 010924123 Sample: 240100-15-03 Grab 1/9/24
Parameters Results Analysis Date Reputing Limit Method
Oil&Grease-SGT HEM a5.0 mg/L 1/15/24 5.0 mg/L EPA 1664B
Meritech Work Order# 010924124 Sample: 240100-15-04 Grab 1/9/24
Parameters Results Analysis Da Reporting Limit Method
Oil&Grease-SGT HEM <5.0 mg/L 1/15/24 5.0 mg/L EPA 1664E
Meritech Work Order# 010924125 Sample: 240100-15-05 Grab 1/9/24
Parameters Results Analysis DateRel2orting Limit Method
Oil&Grease-SGT HEM <5.0 mg/L 1/15/24 5.0 mg/L EPA 1664B
Meritech Work Order# 010924126 Sample: 240100-15-06 Grab 1/9/24
Parameters Results Ana ysia Date Re op rtine Lirni Method
Oil&Grease-SGT HEM <5.0 mg/L 1/15/24 5.0 mg/I, EPA 1664B
Meritech Work Order# 010924127 Sample: 240100-15-07 Grab 1/9/24
Mrameters Result s Analysis late Reporting Limit Method
Oil&Grease-SGT HEM <5.0 mg/L 1/15/24 5.0 mg/L EPA 16648
Meritech Work Order# 010924128 Sample: 240100-15-08 Grab 1/9/24
Parameters Results Analysis Date Reporting Limit Method
Oil&Grease-SGT HEM <5.0 mg/L 1/15/24 5.0 mg/1, EPA 1664E
1 hereby certify that!have reviewed and approve these data.
642 Tamca Road,Reidsville,North Carolina i�story Representative
tel.[phone] fax.[phone]
PO Box 228 • Statesville, NC 28687 • 704/872/4697
Page 11 of 12

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EXHIBIT C
2021 MSGP Permit Parts 1-7 (as modified)
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY (EPA)
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)
MULTI-SECTOR GENERAL PERMIT (MSGP)
FOR STORMWATER DISCHARGES ASSOCIATED WITH INDUSTRIAL ACTIVITY
In compliance with the provisions of the Clean Water Act (CWA), as amended (33 U.S.C. 1251 et
seq.), operators of stormwater discharges associated with industrial activity located in an area
identified in Appendix C where EPA is the permitting authority are authorized to discharge to
waters of the United States in accordance with the eligibility and Notice of Intent (NOI)
requirements, effluent limitations, inspection requirements, and other conditions set forth in this
permit.This permit is structured as follows:
• Parts 1-7: General requirements that apply to all facilities;
• Part 8: Industry sector-specific requirements;
• Part 9:Specific requirements that apply in individual states and Indian country; and
• Appendices A through P: Additional permit conditions that apply to all operators covered
under this permit.
This permit becomes effective on September 29,2021.This permit and the authorization to
discharge shall expire at 11:59 pm eastern time, February 28, 2026.
Signed and issued this 29th day of September 2021 Signed and issued this 29th day of September 2021
KENNETH Digitally signed by CHARLES Digitally aignetlb CHARLES MAGUIRE
KENNETHMORAFF DwNFUS,a US.G­ nt,any,ou=EnNronma 1PrdeNonA
Date:2021.09.29 MAGUIRE O'g 2302R1920 300.1100E.1=66001003650036
MORAFF 09:47:51-04'00' Da1a2021A9.29 13 2519-0—
Kenneth Moraft, Charles Maguire,
Director,Water Division,EPA Region 1. Director,Water Division,EPA Region 6.
Signed and issued this 29th day of September 2021 Signed and issued this 29th day of September 2021
Laureano Digitally signed by J E F F E RY Digitally signed by
Laureano,Javier JEFFERY ROBICHAUD
Date: 2021.09.29
Javier 09:1330-04'00. ROBICHAUD09:31.0929 1: 1-05'0 '
09:31:41-05'00'
Javier Laureano, Jeffery Robichaud,
Director,Water Division,EPA Region 2. Director,Water Division,EPA Region 7.
Signed and issued this 29th day of September 2021 Signed and issued this 29th day of September 2021
CARMEN Digitally signed by CARMEN Digitally signed by
GUERRERO GUERREROPEREZ HUMBERTO HUMBERTOGARCIA
Date:2021.09.2912:07:47 GARCIA Date:2021.09.29
PEREZ -04'00'
12:41:50-06'00'
Carmen R.Guerrero-Perez, Humberto Garcia,
Director,Caribbean Environmental Protection Division,EPA Acting Director,Water Division,EPA Region 8.
Region 2.
Signed and issued this 29th day of September 2021 Signed and issued this 29th day of September 2021
CATHERINE Digitally signed by Digitally signed by
CATHERINE LIBERTZ TOMAS TOMASTORRES
LIBERTZ 1D5:3642-04'00'ate:2021.09 9 TORRES 113:07:02 OT00'9
Catherine A.Libertz, Tomas Torres,
Director,Water Division,EPA Region 3. Director,Water Division,EPA Region 9.
Signed and issued this 29th day of September 2021 Signed and issued this 29th day of September 2021
J EAN EAN N E DDigitally signed by
EANIly signed by EANNE GETTLE DAN I E L DANIIEL OPA SKI
GETTLE 11:0448-04'00'9 OPALSKI 0sss s2o7o09
Jeaneanne Gettle, Daniel D.Opalski,
Director,Water Division,EPA Region 4. Director,Water Division,EPA Region 10.
Signed and issued this 29th day of September 2021
Digitally signed by TERA
FONG
iOc!te:2021.09.29
12:34:56-05'00'
Tera L.Fong,
Director,Water Division,EPA Region 5.
Page 1

Type text here
2021 MSGP Permit Parts 1-7 (as modified)
Table of Contents
1 How to Obtain Coverage Under the 2021 MSGP.................................................................7
1.1 Eligibility Conditions...............................................................................................................7
1.1.1 Location of Your Facility........................................................................................................7
1.1.2 Your Discharges Are Associated with Industrial Activity.....................................................7
1.1.3 Limitations on Coverage.......................................................................................................7
1.1.4 Eligibility Related to Endangered Species Act (ESA) Listed Species and Critical Habitat
Protection...............................................................................................................................8
1.1.5 Eligibility related to National Historic Preservation Act (N HPA)-Protected Properties.......8
1.1.6 Eligibility for "New Dischargers" and "New Sources" (as defined in Appendix A) ONLY..8
1.1.7 Eligibility for Discharges to a Federal Comprehensive Environmental Response,
Compensation, and Liability Act(CERCLA) Site..................................................................9
1.2 Types of Discharges Authorized Under the MSGP..............................................................10
1.2.1 Authorized Stormwater Discharges. ...................................................................................10
1.2.2 Authorized Non-Stormwater Discharges............................................................................11
1.3 Obtaining Authorization to Discharge................................................................................12
1.3.1 Prepare Your Stormwater Pollution Prevention Plan (SWPPP) Prior to Submitting Your
Noticeof Intent (NOI)..........................................................................................................12
1.3.2 How to Submit Your NOI to Get Permit Coverage.............................................................12
1.3.3 Deadlines for Submitting Your NOI and Your Official Date of Permit Coverage..............13
1.3.4 Modifying your NOI .............................................................................................................14
1.3.5 Requirement to Post a Sign of your Permit Coverage. ......................................................14
1.3.6 Your Official End Date of Permit Coverage........................................................................15
1.3.7 Continuation of Coverage for Existing Operators After the Permit Expires.......................15
1.3.8 Coverage Under Alternative Permits..................................................................................15
1.4 Terminating Permit Coverage.............................................................................................16
1.4.1 How to Submit your Notice of Termination (NOT)to Terminate Permit Coverage...........16
1.4.2 When to Submit Your Notice of Termination.......................................................................16
1.5 Conditional Exclusion for No Exposure...............................................................................17
1.6 Permit Compliance..............................................................................................................17
1.7 Severability..........................................................................................................................17
2. Control Measures and Effluent Limits..................................................................................17
2.1 Stormwater Control Measures.............................................................................................18
2.1.1 Stormwater Control Measure Selection and Design Considerations................................18
2.1.2 Non-Numeric Technology-Based Effluent Limits (BPT/BAT/BCT). ......................................20
2.1.3 Numeric Effluent Limitations Based on Effluent Limitations Guidelines.............................24
2.2 Water Quality-Based Effluent Limitations............................................................................25
2.2.1 Water Quality Standards. ....................................................................................................25
2.2.2 Discharges to Water Quality-Impaired Waters..................................................................25
Page 2

2021 MSGP Permit Parts 1-7 (as modified)
2.2.3 Tier 2 Antidegradation Requirements for New Dischargers, New Sources, or Increased
Discharges...........................................................................................................................26
2.3 Requirements Relating to Endangered Species, Historic Properties, and CERCLA Sites..26
3. Inspections...........................................................................................................................27
3.1 Routine Facility Inspections.................................................................................................27
3.1.1 Inspection Personnel...........................................................................................................27
3.1.2 Areas that You Must Inspect...............................................................................................27
3.1.3 What You Must Look for During an Inspection...................................................................27
3.1.4 Inspection Frequency.........................................................................................................27
3.1.5 Exceptions to Routine Facility Inspections for Inactive and Unstaffed Facilities..............28
3.1.6 Routine Facility Inspection Documentation.......................................................................28
3.2 Quarterly Visual Assessment of Stormwater Discharges...................................................29
3.2.1 Visual Assessment Frequency.............................................................................................29
3.2.2 Visual Assessment Procedures. ..........................................................................................29
3.2.3 Visual Assessment Documentation....................................................................................30
3.2.4 Exceptions to Quarterly Visual Assessments......................................................................30
4. Monitoring............................................................................................................................31
4.1 Monitoring Procedures........................................................................................................31
4.1.1 Monitored Stormwater Discharge Points............................................................................31
4.1.2 Commingled Discharges....................................................................................................32
4.1.3 Measurable Storm Events....................................................................................................32
4.1.4 Sample Type........................................................................................................................32
4.1.5 Adverse Weather Conditions..............................................................................................33
4.1.6 Facilities in Climates with Irregular Stormwater Discharges..............................................33
4.1.7 Monitoring Periods...............................................................................................................33
4.1.8 Monitoring for Authorized Non-Stormwater Discharges....................................................33
4.1.9 Monitoring Reports...............................................................................................................33
4.2 Required Monitoring............................................................................................................33
4.2.1 Indicator Monitoring............................................................................................................35
4.2.2 Benchmark Monitoring........................................................................................................37
4.2.3 Effluent Limitations Monitoring.............................................................................................41
4.2.4 State or Tribal Required Monitoring.....................................................................................42
4.2.5 Impaired Waters Monitoring................................................................................................42
4.2.6 Additional Monitoring Required by EPA.............................................................................45
5. Corrective Actions and Additional Implementation Measures (AIM)..............................45
5.1 Corrective Action................................................................................................................45
5.1.1 Conditions Requiring SWPPP Review and Revision to Ensure Effluent Limits are Met.......45
5.1.2 Conditions Requiring SWPPP Review to Determine if Modifications Are Necessary........45
5.1.3 Deadlines for Corrective Actions........................................................................................46
Page 3

2021 MSGP Permit Parts 1-7 (as modified)
5.1.4 Effect of Corrective Action..................................................................................................46
5.1.5 Substantially Identical Discharge Points.............................................................................46
5.2 Additional Implementation Measures (AIM)......................................................................47
5.2.1 Baseline Status.....................................................................................................................47
5.2.2 AIM Triggering Events..........................................................................................................47
5.2.3 AIM Level 1...........................................................................................................................47
5.2.4 AIM Level 2...........................................................................................................................48
5.2.5 AIM Level 3...........................................................................................................................49
5.2.6 AIM Exceptions....................................................................................................................50
5.3 Corrective Action and AIM Documentation......................................................................54
5.3.1 Documentation within 24 Hours..........................................................................................54
5.3.3 Documentation within 14 Days...........................................................................................55
6. Stormwater Pollution Prevention Plan (SWPPP)...................................................................55
6.1 Person(s) Responsible for Preparing the SWPPP.................................................................56
6.2 Required Contents of Your SWPPP ......................................................................................56
6.2.1 Stormwater Pollution Prevention Team...............................................................................56
6.2.2 Site Description....................................................................................................................56
6.2.3 Summary of Potential Pollutant Sources.............................................................................58
6.2.4 Description of Stormwater Control Measures to Meet Technology-Based and Water
Quality-Based Effluent Limits...............................................................................................59
6.2.5 Schedules and Procedures.................................................................................................60
6.2.6 Documentation to Support Eligibility Pertaining to Other Federal Laws............................62
6.2.7 Signature Requirements......................................................................................................62
6.3 Required SWPPP Modifications............................................................................................62
6.4 SWPPP Availability................................................................................................................62
6.4.1 Making Your SWPPP Publicly Available..............................................................................63
6.5 Additional Documentation Requirements..........................................................................63
7. Reporting and Recordkeeping...........................................................................................64
7.1 Electronic Reporting Requirement......................................................................................64
7.2 Submitting Information to EPA.............................................................................................65
7.2.1 Submitting Forms via NeT-MSGP.........................................................................................65
7.2.2 Other Information Required to be Submitted.....................................................................65
7.3 Reporting Monitoring Data to EPA......................................................................................65
7.3.1 Submitting Monitoring Data via NeT-DMR..........................................................................65
7.3.2 When You Can Discontinue Submission of Monitoring Data.............................................66
7.3.3 State or Tribal Required Monitoring Data............................................................................66
7.3.4 Submission Deadline for Indicator and Benchmark Monitoring Data..............................66
7.4 Annual Report......................................................................................................................67
7.5 Numeric Effluent Limitations Exceedance Report..............................................................67
Page 4

2021 MSGP Permit Parts 1-7 (as modified)
7.6 Additional Standard Recordkeeping and Reporting Requirements.................................67
7.7 Record Retention Requirements.........................................................................................68
7.8 Addresses for Reports..........................................................................................................69
8. Sector-Specific Requirements for Industrial Activity.........................................................71
8.A Sector A-Timber Products .................................................................................................71
8.B Sector B-Paper and Allied Products ................................................................................75
8.0 Sector C-Chemical and Allied Products Manufacturing, and Refining .........................77
8.1) Sector D-Asphalt Paving and Roofing Materials and Lubricant Manufacturing............81
8.E Sector E- Glass, Clay, Cement, Concrete, and Gypsum Products..................................83
8.F Sector F-Primary Metals ....................................................................................................86
8.G Sector G-Metal Mining......................................................................................................90
8.H Sector H -Coal Mines and Coal Mining-Related Facilities............................................. 111
8.1 Sector I-Oil and Gas Extraction...................................................................................... 126
8.J Sector J -Non-Metallic Mineral Mining and Dressing..................................................... 129
8.K Sector K-Hazardous Waste Treatment, Storage, or Disposal Facilities ......................... 145
81 Sector L-Landfills, Land Application Sites, and Open Dumps....................................... 150
8.M Sector M-Automobile Salvage Yards............................................................................. 155
8.N Sector N-Scrap Recycling and Waste Recycling Facilities...........................................158
8.0 Sector 0-Steam Electric Generating Facilities .............................................................. 165
8.P Sector P - Land Transportation and Warehousing ........................................................... 169
8.Q Sector Q-Water Transportation....................................................................................... 172
8.R Sector R-Ship and Boat Building and Repair Yards ....................................................... 176
8.S Sector S-Air Transportation.............................................................................................. 179
8.T Sector T-Treatment Works ............................................................................................... 186
8.1.1 Sector U- Food and Kindred Products............................................................................. 189
8.V Sector V-Textile Mills, Apparel, and Other Fabric Products.......................................... 191
8.W Sector W- Furniture and Fixtures...................................................................................... 194
8.X Sector X-Printing and Publishing..................................................................................... 195
8.Y Sector Y- Rubber, Miscellaneous Plastic Products, and Miscellaneous Manufacturing
Industries............................................................................................................................197
81 Sector Z- Leather Tanning and Finishing .........................................................................200
8.AA Sector AA- Fabricated Metal Products...........................................................................202
8.AB Sector AB-Transportation Equipment, Industrial or Commercial Machinery Facilities 205
8.AC Sector AC- Electronic and Electrical Equipment and Components, Photographic and
OpticalGoods ..................................................................................................................206
8.AD Sector AD-Stormwater Discharges Designated by the Director as Requiring Permits.207
9. Permit Conditions Applicable to Specific States, Indian Country Lands, or Territories..209
Appendix A Definitions, Abbreviations, and Acronyms (for the purposes of the 2021 MSGP).A-1
Appendix B Standard Permit Conditions......................................................................................B-1
Appendix C Areas Eligible for Permit Coverage.........................................................................C-1
Appendix D Facilities and Activities Covered.............................................................................D-1
Appendix E Procedures Relating to Endangered Species Protection........................................E-1
Appendix F Procedures Relating to Historic Properties Preservation..........................................F-1
Appendix G Notice of Intent (NOI) Form......................................................................................G-1
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Appendix H Notice of Termination (NOT) Form........................................................................... H-1
Appendix I Annual Report Form ...................................................................................................I-1
Appendix J Calculating Hardness in Freshwater Receiving Waters for Hardness Dependent
Metals.........................................................................................................................J-1
Appendix K No Exposure Certification (NEC) Form.................................................................... K-1
Appendix L List of Tier 3,Tier 2, and Tier 2.5 Waters ..........................................................L-1
Appendix M Discharge Monitoring Report (DMR) Form ..............................................................M-1
Appendix N List of SIC and NAICS Codes....................................................................................N-1
Appendix O Summary of Reports Permit Submittals....................................................................0-1
Appendix P List of Federal CERCLA Sites......................................................................................P-1
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2021 MSGP Permit Parts 1-7 (as modified)
1 How to Obtain Coverage Under the 2021 MSGP
To be covered under this permit, you must meet all of the eligibility conditions and
follow the requirements for obtaining permit coverage in Part 1.
1.1 Eligibility Conditions
1.1.1 Location of Your Facility. Your facility must be located in an area where EPA is the
permitting authority and where coverage under this permit is available (see Appendix
C); 1
1.1.2 Your Discharges Are Associated with Industrial Activity. Your facility must have an
authorized stormwater discharge or an authorized non-stormwater discharge per Part
1.2 associated with industrial activity from your "primary industrial activity" (as defined in
Appendix A and as listed in Appendix D), or you have been notified by EPA that you
are eligible for coverage under Sector AD.
1.1.3 Limitations on Coverage. Discharges from your facility are not:
1.1.3.1 Discharges mixed with non-stormwater discharges. Discharges mixed with non-
stormwater discharges other than those mixed with authorized non-stormwater
discharges listed in Part 1.2.2, and/or those mixed with a discharge authorized by a
different NPDES permit and/or a discharge that does not require NPDES authorization.
1.1.3.2 Stormwater discharges associated with construction activity.Stormwater discharges
associated with construction activity disturbing one acre or more, or that are part of a
larger common plan of development or sale if the larger common plan will ultimately
disturb one acre or more, unless in conjunction with mining activities or certain oil and
gas extraction activities as specified in Sectors G, H, I, and J of this permit.
1.1.3.3 Discharges already covered by another NPDES permit. Unless you have received
written notification from EPA specifically allowing these discharges to be covered
under this permit, you are not eligible for coverage under this permit for any of the
following:
a. Stormwater discharges associated with industrial activity that are currently covered
under an individual NPDES permit or an alternative NPDES general permit;
b. Stormwater discharges covered within five years prior to the effective date of this
permit by an individual NPDES permit or alternative NPDES general permit where
that permit established site-specific numeric water quality-based effluent limitations
developed for the industrial stormwater component of the discharge;or
c. Discharges from facilities where any NPDES permit has been or is in the process of
being denied, terminated, or revoked by EPA (this does not apply to the routine
expiration and reissuance of NPDES permits every five years).
1.1.3.4 Stormwater Discharges Subiect to Effluent Limitations Guidelines.Stormwater discharges
subject to stormwater effluent limitation guidelines under 40 CFR, Subchapter N, other
than those listed in Table 1-1 of this permit.
This condition also applies in the limited circumstances where your facility is located in a jurisdiction where
EPA is not the permitting authority, but your discharge point location is to a water of the United States
where EPA is the permitting authority.
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2021 MSGP Permit Parts 1-7 (as modified)
1.1.4 Eligibility Related to Endangered Species Act (ESA) Listed Species and Critical Habitat
Protection. You are able to demonstrate that your stormwater discharges, authorized
non-stormwater discharges, and stormwater discharge-related activities are not likely
to adversely affect any species that are federally listed as endangered or threatened
("ESA-listed") and are not likely to adversely affect habitat that is designated as
"critical habitat" under the Endangered Species Act (ESA), or said discharges and
activities were the subject of an ESA Section 7 consultation or an ESA Section 10 permit.
You must follow the procedures outlined in the Endangered Species Protection section
of the NOI in EPA's NPDES eReporting Tool (NeT-MSGP) and meet one of the criteria
listed in Appendix E. You must comply with any measures that formed the basis of your
criteria eligibility determination to be in compliance with the MSGP. These measures
become permit requirements per Part 2.3. Documentation of these measures must be
kept as part of your Stormwater Pollution Prevention Plan (SWPPP) (see Part 6.2.6.1).
1.1.5 Eligibility related to National Historic Preservation Act(N HPA)-Protected Properties. You
must follow the procedures outlined in the Historic Properties section of the NOI in NeT-
MSGP to demonstrate that your stormwater discharges, authorized non-stormwater
discharges, and stormwater discharge-related activities meet one of the eligibility
criteria in Appendix F.
1.1.6 Eligibility for "New Dischargers" and "New Sources" (as defined in Appendix Al2 ONLY.
1.1.6.1 Eligibility for "New Dischargers" and "New Sources" Based on Water Quality Standards.
Your stormwater discharge must be controlled as necessary such that the receiving
water of the United States will meet applicable water quality standards. You are
ineligible for coverage under this permit if EPA determines prior to your authorization to
discharge that your stormwater discharges will not be controlled as necessary such
that the receiving water of the United States will not meet an applicablewater quality
standard. In such case, EPA may notify you that an individual permit application is
necessary per Part 1.3.8, or, alternatively, EPA may authorize your coverage under this
permit after you implement additional control measures so that your stormwater
discharges will be controlled as necessary such that the receiving water of the United
States will meet applicable water quality standards.
1.1.6.2 Eligibility for "New Dischargers" and "New Sources" for Water-Quality Impaired Waters.
If you discharge to an "impaired water" (as defined in Appendix A), you must do one
of the following:
a. Prevent all exposure to stormwater of the pollutant(s) for which the waterbody is
impaired, and retain documentation of procedures taken to prevent exposure
onsite with your SWPPP;
b. When submitting your NOI in NeT-MSGP, provide the technical information or other
documentation to support your claim that the pollutant(s) for which the waterbody
2"New Discharger" means a facility from which there is or may be a discharge, that did not commence the
discharge of pollutants at a particular site prior to August 13, 1979,which is not a new source, and which
has never received a finally effective NPDES permit for discharges at that site.See 40 CFR 122.2.
"New Source" means any building, structure, facility, or installation from which there is or may be a
"discharge of pollutants,"the construction of which commenced:i) after promulgation of standards of
performance under section 306 of the CWA which are applicable to such source,or ii) after proposal of
standards of performance in accordance with section 306 of the CWA which are applicable to such
source, but only if the standards are promulgated in accordance with section 306 within 120 days of their
proposal. See 40 CFR 122.2.
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2021 MSGP Permit Parts 1-7 (as modified)
is impaired is not present at your facility, and retain such documentation with your
SWPPP; or
c. When submitting your NOI in NeT-MSGP, provide either data or other technical
documentation, to support a conclusion that the stormwater discharge will be
controlled as necessary such that the receiving water of the United States will meet
applicable water quality standards and retain such information with your SWPPP.
The information you submit must demonstrate:
i. For discharges to waters without an EPA-approved or established total
maximum daily load (TMDL), that the discharge of the pollutant for which the
water is impaired will be controlled as necessary such that the receiving water
of the United States will meet applicable water quality standards at the point
of discharge to the waterbody; or
ii. For discharges to waters with an applicable EPA-approved or established
TMDL, that there are, in accordance with 40 CFR 122.4(i), sufficient remaining
wasteload allocations in the TMDL to allow your discharge and that existing
dischargers to the waterbody are subject to compliance schedules designed
to bring the waterbody into attainment with water quality standards (e.g., a
reserve allocation for future growth).
1.1.6.3 Eligibility for "New Dischargers" and "New Sources" for Waters with High Water Quality
(Tier 2,2.5, and 3).
a. For new dischargers and new sources to Tier 2 or Tier 2.5 waters, your discharge
must not lower the water quality of the applicable water. See a list of Tier 2 and
Tier 2.5 waters in Appendix L.
b. For new dischargers and new sources to waters designed by a state or tribe as
Tier 3 waters3 (i.e., outstanding national resource waters) for antidegradation
purposes under 40 CFR 131.12(a)(3), you are not eligible under this permit and
you must apply for an individual permit. See a list of Tier 3 waters in Appendix L.
1.1.7 Eligibility for Discharges to a Federal Comprehensive Environmental Response,
Compensation, and Liability Act(CERCLA) Site. If you discharge to a federal CERCLA
Site listed in Appendix P, you must notify the EPA Region 10 Office when submitting your
NOI, and the EPA Region 10 Office must determine that you are eligible for permit
coverage. In determining eligibility for coverage under this Part, the EPA Region 10
Office may evaluate whether you are implementing or plan to implement adequate
controls and/or procedures to ensure that your discharge will not lead to
recontamination of aquatic media at the CERCLA Site (i.e., your stormwater discharge
will be controlled as necessary such that the receiving water of the United States will
meet an applicable water quality standard). If it is determined that your facility
discharges to a CERCLA Site listed in Appendix P after you have obtained coverage
under this permit, you must contact the EPA Region 10 Office and ensure that you
either have implemented or will implement adequate controls and/or procedures to
ensure that your discharges will not lead to recontamination of aquatic media at the
3 For the purposes of this permit,your project is considered to discharge to a Tier 2,Tier 2.5, or Tier 3 water if
the first water of the United States to which you discharge is identified by a state,tribe,or EPA as a Tier 2,
Tier 2.5, or Tier 3 water. For discharges that enter a separate storm sewer system prior to discharge, the first
water of the United States to which you discharge is the waterbody that receives the stormwater discharge
from the storm sewer system (separate storm sewer systems (MS4s and non-municipal storm sewers systems)
do not include combined sewer systems or separate sanitary sewer systems).
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2021 MSGP Permit Parts 1-7 (as modified)
CERCLA Site such that your stormwater discharge will be controlled as necessary such
that the receiving water of the United States will meet an applicable water quality
standard.
For the purposes of this permit, a facility discharges to a federal CERCLA Site if the
discharge flows directly into the site through its own conveyance, or through a
conveyance owned by others, such as a municipal separate storm sewer system (MS4).
1.2 Types of Discharges Authorized Under the MSGP4
1.2.1 Authorized Stormwater Discharges. If you meet all the eligibility criteria in Part 1.1, then
the following discharges from your facility are authorized under this permit:
1.2.1.1 Stormwater discharges associated with industrial activity for any "primary industrial
activities" and "co-located industrial activities" (as defined in Appendix A) exceptfor
any stormwater discharges prohibited in Part8;
1.2.1.2 Discharges EPA has designated as needing a stormwater permit as provided in Sector
AD;
1.2.1.3 Discharges that are not otherwise required to obtain NPDES permit authorization but are
mixed with discharges that are authorized under this permit;and
1.2.1.4 Stormwater discharges from facilities subject to any of the national stormwater-specific
effluent limitations guidelines listed in Table 1-1.
Table 1-1. Stormwater-Specific Effluent Limitations Guidelines
40 CFR MSGP New Source New Source
Regulated Discharge Performance
Section Sector Date
Standard (NSPS)
Discharges resulting from spray down or Part 429, A Yes 1121181
intentional wetting of logs at wet deck storage Subpart
areas J
Runoff from phosphate fertilizer manufacturing Part 418, C Yes 4/8/74
facilities that comes into contact with any raw Subpart A
materials, finished product, by-products or
waste products (SIC 2874)
Runoff from asphalt emulsion facilities Part 443, D Yes 7/28/75
Subpart A
Runoff from material storage piles at cement Part 411, 2/20/74
manufacturing facilities Subpart C E Yes
Mine dewatering discharges at crushed Part 436, J No N/A
stone, construction sand and gravel, or Subparts B,
industrial sand mining facilities C, and D
Runoff from hazardous waste and non- Part 445, K, L Yes 2/2/00
hazardous waste landfills Subparts A
and B
4 Any discharges not expressly authorized in this permit cannot become authorized or shielded from liability
under Clean Water Act (CWA) section 402(k) by disclosure to EPA, state, or local authorities after issuance
of this permit via any means,including the Notice of Intent (NOI) to be covered by the permit, the
Stormwater Pollution Prevention Plan (SWPPP), or during an inspection.
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2021 MSGP Permit Parts 1-7 (as modified)
40 CFR MSGP New Source New Source
Regulated Discharge Section Sector Performance Date
Standard NSPS
Runoff from coal storage piles at steam Part 423 O Yes 1 1/19/82
electric generating facilities (10/8/74)1
Runoff containing urea from airfield Part 449 S Yes 6/15/1
pavement deicing at existing and new
primary airports with 1,000 or more annual
non-propeller aircraft departures
NSPS promulgated in 1974 were not removed via the 1982 regulation;therefore,wastewaters generated
by 40 CFR Part 423-applicable sources that were New Sources under the 1974 regulations are subject to the
1974 NSPS.
1.2.2 Authorized Non-Stormwater Discharges. Below is the list of non-stormwater discharges
authorized under this permit. Unless specifically listed in this Part, this permit does not
authorize any other non-stormwater discharges requiring NPDES permit coverage and
you must either eliminate those discharges or they must be covered under another
NPDES permit; this includes the sector-specific non-stormwater discharges that are
listed in Part 8 as prohibited (a non-exclusive list is provided only to raise awareness of
contaminants or sources of contaminants generally characteristic of certain sectors).
1.2.2.1 Authorized Non-Stormwater Discharges for All Sectors.The following are the only non-
stormwater discharges authorized under this permit for all sectors provided that all
discharges comply with the effluent limits set forth in Parts 2 and 8.
a. Discharges from emergency/unplanned fire-fighting activities;
b. Fire hydrant flushings;
c. Potable water, including uncontaminated water line flushings;
d. Uncontaminated condensate from air conditioners, coolers/chillers, and other
compressors and from the outside storage of refrigerated gases orliquids;
e. Irrigation/landscape drainage, provided all pesticides, herbicides, and fertilizers
have been applied in accordance with the approved labeling;
f. Pavement wash waters, provided that detergents or hazardous cleaning products
are not used (e.g., bleach, hydrofluoric acid, muriatic acid, sodium hydroxide,
nonylphenols), and the wash waters do not come into contact with oil and grease
deposits, sources of pollutants associated with industrial activities (see Part 6.2.3),
or any other toxic or hazardous materials, unless residues are first cleaned up using
dry clean-up methods (e.g., applying absorbent materials and sweeping, using
hydrophobic mops/rags) and you have implemented appropriate control
measures to minimize discharges of mobilized solids and other pollutants (e.g.,
filtration, detention, settlement);
g. External building/structure washdown / power wash water that does not use
detergents or hazardous cleaning products (e.g., those containing bleach,
hydrofluoric acid, muriatic acid, sodium hydroxide,nonylphenols) and you have
implemented appropriate control measures to minimize discharges of mobilized
solids and other pollutants (e.g., filtration, detention, settlement);
h. Uncontaminated ground water or spring water;
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2021 MSGP Permit Parts 1-7 (as modified)
1. Foundation or footing drains where flows are not contaminated with process
materials;
j. Incidental windblown mist from cooling towers that collects on rooftops or
adjacent portions of your facility, but not intentional discharges from the cooling
tower (e.g., "piped" cooling tower blowdown; drains); and
k. Any authorized non-stormwater discharge listed above in this Part 1.2.2 or any
stormwater discharge listed in Part 1.2.1 mixed with a discharge authorized by a
different NPDES permit and/or a discharge that does not require NPDES permit
authorization.
1.2.2.2 Additional Authorized Non-Stormwater Discharge for Sector A Facilities. 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, provided the non-stormwater component of the discharge is in
compliance with the non-numeric effluent limits requirements in Part2.1.2.
1.2.2.3 Additional Authorized Non-Stormwater Discharges for Earth-Disturbing Activities
Conducted Prior to Active Mining Activities for Sectors G, H and J Facilities. The
following non-stormwater discharges identified in a, b, and c are only authorized for
earth-disturbing activities conducted prior to active mining activities, as defined in Part
8.G.3.2, 8.H.3.2, and 8.J.3.2, provided that, with the exception of water used to control
dust, these discharges are not routed to areas of exposed soil and all discharges
comply with the permit's effluent limits:
a. Water used to wash vehicles and equipment, provided that there is no
discharge of soaps, solvents, or detergents used for such purposes;
b. Water used to control dust;and
c. Dewatering water that has been treated by an appropriate control under Parts
8.G.4.2.9, 8.H.4.2.9, or 8.J.4.2.9.
Once the earth-disturbing activities conducted prior to active mining activities have
ceased, the only authorized non-stormwater discharges for Sectors G, H, and J are
those listed in Part 1.2.2.1 .
1.3 Obtaining Authorization to Discharge
1.3.1 Prepare Your Stormwater Pollution Prevention Plan (SWPPP) Prior to Submitting Your
Notice of Intent(NOI). You must develop a SWPPP or update your existing SWPPP per
Part 6 prior to submitting your NOI for coverage under this permit, per Part 1.3.2 below.
You must make your SWPPP publicly available by either attaching it to your NOI,
including a URL in your NOI, or providing additional information from your SWPPP on
your NOI, per Part 6.4.
1.3.2 How to Submit Your NOI to Get Permit Coverage.To be covered under this permit, you
must use EPA's NPDES eReporting Tool for the MSGP (NeT-MSGP) to electronically
prepare and submit to EPA a complete and accurate NOI by the deadline applicable
to your facility presented in Table 1-2. The NOI certifies to EPA that you are eligible for
coverage according to Part 1.1 and provides information on your industrial activities
and related discharges. Per Part 7.1, you must submit your NOI electronically via NeT-
MSGP, unless the applicable EPA Regional Office grants you a waiver from electronic
reporting, in which case you may use the paper NOI form in Appendix G.To access
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2021 MSGP Permit Parts 1-7 (as modified)
NeT-MSGP, go to https://www.epa.gov/npdes/stormwater-discharges-industrial-
activities#accessinamsgp
1.3.3 Deadlines for Submitting Your NOI and Your Official Date of Permit Coverage.Table 1-2
provides the deadlines for submitting your NOI and your official start date of permit
coverage.
Table 1-2. NOI Submittal Deadlines and Discharge Authorization Dates
NOI Submission
Category of Facility/Operator Deadline Discharge Authorization Date' 2
Existing MSGP facility.Operators of No later than May 30, 30 calendar days after EPA notifies
industrial activities whose stormwater 2021. you that it has received a
discharges were covered under the complete NOI,unless EPA notifies
2015 MSGP. you that your authorization has
been denied or delayed. Note:
You must review and update your
SWPPP to ensure that this permit's
requirements are addressed prior
to submitting your NOI.
Provided you submit your NOI in
accordance with the deadline,
your authorization under the 2015
MSGP is automatically continued
until you have been granted
coverage under this permit or an
alternative permit,or coverage is
otherwise terminated.
Operator operating consistent with As soon as possible, 30 calendar days after EPA notifies
EPA's No Action Assurance and but see the June 3, you that it has received a
submitted an Intent to Operate(ITO) 2020 'No Action complete NOI,unless EPA notifies
form.Operators of industrial activities Assurance for the you that your authorization has
who commenced discharging between NPDES Stormwater been denied or delayed.
June 4,2020 and March 1,2021 and Multi-Sector General
have been operating consistent with Permit for Industrial
EPA's June 3,2020 'No Action Activities' (and any
Assurance for the NPDES Stormwater updates to that
Multi-Sector General Permit for Industrial document) for
Activities.' additional guidance
on deadlines.
New facility without MSGP coverage. At least 30 calendar 30 calendar days after EPA notifies
Operators of industrial activities that will days prior to you that it has received a
commence discharging after March 1, commencing complete NOI,unless EPA notifies
2021. discharge. you that your authorization has
Existing facility covered under an At least 30 calendar been denied or delayed.
alternative permit.Operators seeking days prior to
coverage for stormwater discharges commencing
previously covered under an individual discharge.
permit or an alternative general permit.
Existing MSGP facility with a new At least 30 calendar
operator. New operators of existing days prior to the
industrial activities with stormwater date of transfer of
discharges previously authorized under control to the new
the 2021 MSGP. operator.
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2021 MSGP Permit Parts 1-7 (as modified)
NOI Submission
Category of Facility/Operator Deadline Discharge Authorization Date',s
Existing facility without MSGP coverage. Immediately;your
Operators of industrial activities that stormwater
commenced discharging prior to discharges are
March 1,2021, but whose stormwater currently
discharges were not covered under the unpermitted.1
2015 MSGP or another NPDES permit
and have not been operating
consistent with EPA's No Action
Assurance for EPA's NPDES MSGP.
If you have missed the deadline to submit your NOI,any and all discharges from your industrial activities will continue to
be unauthorized under the CWA until they are covered by this or a different NPDES permit. EPA may take enforcement
action for any unpermitted discharges that occur between the commencement of discharging and discharge
authorization.
2 Discharges are not authorized if your NOI is incomplete or inaccurate or if you are ineligible for permit coverage.
1.3.4 Modifying your NOI. If after submitting your NOI, you need to correct or update any
fields, you may do so by submitting a "Change NOI" form using NeT-MSGP. Per Part
7.2.1, you must submit your Change NOI electronically via NeT-MSGP, unless the EPA
Regional Office grants you a waiver from electronic reporting, in which case you may
use the suggested format for the paper Change NOI form.
1.3.4.1 For an existing operator, if any of the information supplied on the NOI changes, you
must submit a Change NOI form within thirty (30) calendar days after the change
occurs.
1.3.4.2 At a facility where there is a transfer in operator or a new operator takes over
operational control at an existing facility, the new operator must submit a new NOI no
later than thirty (30) calendar days after a change in operators.The previous operator
must submit a Notice of Termination (NOT) no later than thirty (30) calendar days after
MSGP coverage becomes active for the new operator, as specified in Part 1.4.
1.3.5 Requirement to Post a Sian of your Permit Coverage. You must post a sign or other
notice of your permit coverage at a safe, publicly accessible location in close proximity
to your facility. Public signage is not required where other laws or local ordinances
prohibit such signage, in which case you must document in your SWPPP a brief
explanation for why you cannot post a sign and a reference to the law or ordinance.
You must use a font large enough to be readily viewed from a public right-of-way and
perform periodic maintenance of the sign to ensure that it remains legible, visible, and
factually correct. At minimum, the sign must include:
1.3.5.1 The following statement: "[Name of facility] is permitted for industrial stormwater
discharges under the U.S. EPA's Multi-Sector General Permit (MSGP)";
1.3.5.2 Your NPDES ID number;
1.3.5.3 A contact phone number for obtaining additional facility information;
1.3.5.4 One of the following:
a. The Uniform Resource Locator (URL) for the SWPPP (if available), and the following
statement: "To report observed indicators of stormwater pollution, contact
[optional: include facility point of contact and] EPA at: [include the applicable
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2021 MSGP Permit Parts 1-7 (as modified)
MSGP Regional Office contact information found at
https://www.epo.clov/npdes/contact-us-stormwater#regional]; or
b. The following statement: "To obtain the Stormwater Pollution Prevention Plan
(SWPPP) for this facility or to report observed indicators of stormwater pollution,
contact [optional:include facility point of contact and] EPA at [include the
applicable MSGP Regional Office contact information found at
httips://www.eipa.ciovinipdeslcontact-us-stormwater#regional]."
1.3.6 Your Official End Date of Permit Coverage. Once covered under this permit, your
coverage will last until the date that:
1.3.6.1 You terminate permit coverage by submitting a Notice of Termination (NOT) per Part
1.4; or
1.3.6.2 You receive coverage under a different NPDES permit or a reissued or replacement
version of this permit after it expires on February 28, 2026; or
1.3.6.3 You fail to submit an NOI for coverage under a reissued or replacement version of this
permit before the required deadline.
1.3.7 Continuation of Coverage for Existing Operators After the Permit Expires
1.3.7.1 Note that if the 2021 MSGP is not reissued or replaced prior to the expiration date, it will
be administratively continued in accordance with section 558(c) of the Administrative
Procedure Act (see 40 CFR 122.6) and remain in force and effect for operators that
were covered prior to its expiration. All operators authorized to discharge prior to the
expiration date of the 2021 MSGP will automatically remain covered under the 2021
MSGP until the earliest of:
a. The date the operator is authorized for coverage under a new version of the
MSGP following the timely submittal of a complete and accurate NOI. Note that if
a timely NOI for coverage under the reissued or replacement permit is not
submitted, coverage will terminate on the date that the NOI was due; or
b. The date of the submittal of a Notice of Termination; or
C. Issuance of an individual permit for the facility's discharge(s);or
d. A final permit decision by EPA not to reissue the MSGP, at which time EPA will
identify a reasonable time period for covered operators to seek coverage under
an alternative general permit or an individual permit. Coverage under the 2021
MSGP will terminate at the end of this time period.
1.3.7.2 EPA reserves the right to modify or revoke and reissue the 2021 MSGP under 40 CFR
122.62 and 63, in which case operators will be notified of any relevant changes or
procedures to which they may be subject. If EPA fails to issue another general permit
prior to the expiration of a previous one, EPA does not have the authority to provide
coverage to industrial operators not already covered under that prior general permit. If
the five-year expiration date for the 2021 MSGP has passed and a new MSGP has not
been reissued, new operators seeking discharge authorization should contact EPA
regarding the options available, such as applying for individual permit coverage.
1.3.8 Coverage Under Alternative Permits. EPA may require you to apply for and/or obtain
authorization to discharge under an alternative permit, i.e., either an individual NPDES
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permit or an alternative NPDES general permit, in accordance with 40 CFR 122.64 and
124.5. If EPA requires you to apply for an alternative permit, the Agency will notify you in
writing that a permit application or NOI is required.This notification will include a brief
statement of the reasons for this decision and will contain alternative permit
application or NOI requirements, including deadlines for completing your application
or NOI.
1.3.8.1 Denial of Coverage for New or Previously Unpermitted Facilities. For new or previously
unpermitted facilities, following the submittal of your NOI, you may be denied coverage
under this permit and must apply for and/or obtain authorization to discharge under an
alternative permit.
1.3.8.2 Loss of Authorization Under the 2021 MSGP for Existinq Permitted Facilities. If your
stormwater discharges are covered under this permit, you may receive a written
notification that you must either apply for coverage under an individual NPDES permit
or submit an NOI for coverage under an alternative general NPDES permit. In addition
to the reasons for the decision and alternative permit application or NOI deadlines, the
notice will include a statement that on the effective date of your alternative permit
coverage, your coverage under the 2021 MSGP will terminate. EPA will terminate your
MSGP permit coverage in NeT-MSGP at that time. EPA may grant additional time to
submit the application or NOI if you request it. If you fail to submit an alternative permit
application or NOI as required by EPA, then your authorization to discharge under the
2021 MSGP is terminated at the end of the day EPA required you to submit your
alternative permit application or NOI. EPA may take appropriate enforcement action
for any unpermitted discharge.
1.3.8.3 Operators Requesting Coverage Under an Alternative Permit. You may request to be
covered under an individual permit. In such a case, you must submit an individual
permit application in accordance with the requirements of 40 CFR 122.28(b)(3)(iii), with
reasons supporting the request, to the applicable EPA Regional Office listed in Part 7.8
of this permit. The request may be granted by issuance of an individual permit if your
reasons are adequate to support the request. When you are authorized to discharge
under an alternative permit, your authorization to discharge under the 2021 MSGP is
terminated on the effective date of the alternative permit.
1.4 Terminating Permit Coverage
1.4.1 How to Submit your Notice of Termination (NOT)to Terminate Permit Coverage. To
terminate permit coverage, you must use EPA's NPDES eReporting Tool for the MSGP
(NeT-MSGP) to electronically prepare and submit to EPA a complete and accurate
NOT. Per Part 7.1, you must submit your NOT electronically via NeT-MSGP, unless the EPA
Regional Office grants you a waiver from electronic reporting, in which case you may
use the paper NOT form in Appendix H. To access NeT-MSGP, go to
httl2s://www.el2a.gov/nl2des/stormwater-discharges-industrial-
activities#accessingmsgp
Your authorization to discharge under this permit terminates at midnight of the day that
you are notified that your complete NOT has been processed. If you submit a NOT
without meeting one or more of the conditions in Part 1.4.2 then your NOT is not valid.
Until you terminate permit coverage, you must comply with all conditions and effluent
limitations in the permit.
1.4.2 When to Submit Your Notice of Termination. You must submit a NOT within 30 days after
one or more of the following conditions have been met:
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2021 MSGP Permit Parts 1-7 (as modified)
1.4.2.1 A new owner or operator has received authorization to discharge under this permit;or
1.4.2.2 You have ceased operations at the facility and/or there are not or no longer will be
discharges of stormwater associated with industrial activity from the facility, and you
have already implemented necessary sediment and erosion controls per Part 2.1.2.5;
or
1.4.2.3 You are a Sector G, H, or J facility and you have met the applicable termination
requirements;or
1.4.2.4 You obtained coverage under an individual or alternative general permit for all
discharges required to be covered by an NPDES permit, unless EPA terminates your
coverage for you per Part 1.3.8.
1.5 Conditional Exclusion for No Exposure
If you are covered by this permit and become eligible for a "no exposure" exclusion
from permitting under 40 CFR 122.26(g), you may file a No Exposure Certification (NEC).
You are no longer required to have a permit upon submission of a complete and
accurate NEC to EPA. If you are no longer required to have permit coverage because
of a no exposure exclusion and have submitted a NEC form to EPA, you are not
required to submit a NOT. You must submit a NEC form to EPA once every five years.
You must use EPA's NPDES eReporting Tool for the MSGP (NeT-MSGP) to electronically
prepare and submit to EPA a complete and accurate NEC. Per Part 7.2.1, you must
submit your NEC electronically via NeT-MSGP, unless the applicable EPA Regional
Office grants you a waiver from electronic reporting, in which case you may use the
paper NEC form in Appendix K.To access NeT-MSGP, go to
httl2s://cdxnodengn_epa.aov/net-msgp/action/login
1.6 Permit Compliance
Any noncompliance with any of the requirements of this permit constitutes a violation
of this permit, and thus is a violation of the CWA. As detailed in Part 5, failure to take
any required corrective actions constitutes an independent, additional violation of this
permit, in addition to any original violation that triggered the need for a corrective
action. As such, any actions and time periods specified for remedying noncompliance
do not absolve you of the initial underlying noncompliance.
Where an Additional Implementation Measure (AIM) is triggered by an event that
does not itself constitute permit noncompliance (i.e., an exceedance of an
applicable benchmark), there is no permit violation provided you comply with the
required responses within the relevant deadlines established in Part 5.
1.7 Severability
Invalidation of a portion of this permit does not necessarily render the whole permit
invalid. EPA's intent is that the permit is to remain in effect to the extent possible; in the
event that any part of this permit is invalidated, EPA will advise the regulated
community as to the effect of such invalidation.
2. Control Measures and Effluent Limits
In the technology-based limits included in Parts 2.1 and 8, the term "minimize" means
to reduce and/or eliminate to the extent achievable using stormwater control
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2021 MSGP Permit Parts 1-7 (as modified)
measures (SCMs) (including best management practices) that are technologically
available and economically practicable and achievable in light of best industry
practice. The term "infeasible" means not technologically possible or not economically
practicable and achievable in light of best industry practices. EPA notes that it does
not intend for any permit requirement to conflict with state water rights law.
2.1 Stormwater Control Measures
You must select, design, install, and implement stormwater control measures (including
best management practices) to minimize pollutant discharges that address the
selection and design considerations in Part 2.1.1, meet the non-numeric effluent limits in
Part 2.1.2, meet limits contained in applicable effluent limitations guidelines in Part 2.1.3,
and meet the water quality-based effluent limitations in Part 2.2.
The selection, design, installation, and implementation of control measures to comply
with Part 2 must be in accordance with good engineering practices and
manufacturer's specifications. Note that you may deviate from such manufacturer's
specifications where you provide justification for such deviation and include
documentation of your rationale in the part of your SWPPP that describes your control
measures, consistent with Part 6.2.4. You must modify your stormwater control measures
per Part 5.1 if you find that your control measures are not achieving their intended
effect of minimizing pollutant discharges (i.e., your discharges will be controlled as
necessary such that the receiving water of the United States will meet applicable
water quality standards or meet any of the other non-numeric effluent limits in this
permit). Regulated stormwater discharges from your facility include stormwater run-on
that commingles with stormwater discharges associated with industrial activity at your
facility.
2.1.1 Stormwater Control Measure Selection and Design Considerations. You must consider
the following when selecting and designing control measures:
2.1.1.1 Preventing stormwater from coming into contact with polluting materials is generally
more effective, and less costly, than trying to remove pollutants from stormwater;
2.1.1.2 Using stormwater control measures in combination may be more effective than using
control measures in isolation for minimizing pollutants in your stormwater discharge;
2.1.1.3 Assessing the type and quantity of pollutants, including their potential to impact
receiving water quality, is critical to designing effective stormwater control measures
that will achieve the limits in this permit;
2.1.1.4 Minimizing impervious areas at your facility and infiltrating stormwater onsite (including
bioretention cells, green roofs, and pervious pavement, among other approaches) can
reduce the frequency and volume of discharges and improve ground water recharge
and stream base flows in local streams, although care must be taken to avoid ground
water contamination;
2.1.1.5 Attenuating flow using open vegetated swales and natural depressions can reduce in-
stream impacts of erosive flows;
2.1.1.6 Conserving and/or restoring riparian buffers will help protect streams from stormwater
discharges and improve water quality;
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2021 MSGP Permit Parts 1-7 (as modified)
2.1.1.7 Using treatment interceptors (e.g., swirl separators and sand filters) maybe appropriate
in some instances to minimize the discharge of pollutants; and
2.1.1.8 Implementing structural improvements, enhanced/resilient pollution prevention
measures, and other mitigation measures can help to minimize impacts from
stormwater discharges from major storm events such as hurricanes, storm surge,
extreme/heavy precipitation,5 and flood events. If such stormwater control measures
are already in place due to existing requirements mandated by other state, local or
federal agencies, you should document in your SWPPP a brief description of the
controls and a reference to the existing requirement(s). If your facility may be exposed
to or has previously experienced such major storm events,6 additional stormwater
control measures that may be considered include, but are not limited to:
a. Reinforce materials storage structures to withstand flooding and additional
exertion of force;
b. Prevent floating of semi-stationary structures by elevating to the Base Flood
Elevation (BFE)7 level or securing with non-corrosive device;
C. When a delivery of exposed materials is expected, and a storm is anticipated
within 48 hours, delay delivery until after the storm or store materials as
appropriate (refer to emergency procedures);
d. Temporarily store materials and waste above the BFE level;
e. Temporarily reduce or eliminate outdoor storage;
f. Temporarily relocate any mobile vehicles and equipment to higher ground;
g. Develop scenario-based emergency procedures for major storms that are
complementary to regular stormwater pollution prevention planning and identify
emergency contacts for staff and contractors; and
h. Conduct staff training for implementing your emergency procedures at regular
intervals.
Note: Part 2.1.1 requires that you must consider Parts 2.1.1.1 through 2.1.1.8 when
selecting and designing control measures to minimize pollutant discharges via
stormwater. Part 2.1.1 does not require nor prescribe specific control measure to be
implemented,however, you must document in your SWPPP per Part 6.2.4 the
5 Heavy precipitation refers to instances during which the amount of rain or snow experienced in a location
substantially exceeds what is normal.What constitutes a period of heavy precipitation varies according to
location and season.Heavy precipitation does not necessarily mean the total amount of precipitation at a
location has increased just that precipitation is occurring in more intense or more frequent events.
b To determine if your facility is susceptible to an increased frequency of major storm events that could
impact the discharge of pollutants in stormwater,you may reference FEMA, NOAA, or USGS flood map
products at https://www.usgs.gov/fags/where-can-i-find-flood-maps?gt-news science products=0#gt-
news science products.
7 Base Flood Elevation (BFE) is the elevation of surface water resulting from a flood that has a 1%chance of
equaling or exceeding that level in any given year.The BFE is shown on the Flood Insurance Rate Map
(FIRM) for zones AE,AH,Al-A30,AR,AR/A,AR/AE,AR/Al-A30,AR/AH,AR/AO, V1-V30 and VE. (Source:
httr)s://www.fema.gov/node/404233).The FEMA Flood Map Service Center can be accessed through
https://msc.fema.gov/portal/search.
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2021 MSGP Permit Parts 1-7 (as modified)
considerations made to select and design control measures at your facility to minimize
pollutants discharged via stormwater.
2.1.2 Non-Numeric Technology-Based Effluent Limits (BPT/BAT/BCT).8 You must comply with
the following non-numeric effluent limits as well as any sector-specific non-numeric
effluent limits in Part 8, except where otherwise specified.
Effluent limit requirements in Part 2.1.2 that do not involve the site-specific selection of a
control measure or are specific activity requirements (e.g., "Cleaning catch basins
when the depth of debris reaches two-thirds (2/3) of the sump depth, in line with
manufacturer specifications, whichever is lower, and keeping the debris surface at
least six inches below the lowest outlet pipe") are marked with an asterisk (*). When
documenting in your SWPPP, per Part 6, how you will comply with the requirements
marked with an asterisk, you have the option of including additional information or you
may just "copy-and-paste" those effluent limits word-for-word from the permit into your
SWPPP without providing additional documentation (see Part 6.2.4).
2.1.2.1 Minimize Exposure. You must minimize the exposure of manufacturing, processing, and
material storage areas (including loading and unloading, storage, disposal, cleaning,
maintenance, and fueling operations) to rain, snow, snowmelt, and stormwater in order
to minimize pollutant discharges by either locating these industrial materials and
activities inside or protecting them with storm resistant coverings. Unless infeasible, you
must also:
a. Use grading, berming or curbing to prevent discharges of contaminated flows
and divert run-on away from these areas;
b. Locate materials, equipment, and activities so that potential leaks and spills are
contained or able to be contained or diverted before discharge;
C. Store leaky vehicles and equipment indoors;
d. Perform all vehicle and/or equipment cleaning operations indoors, under
cover, or in bermed areas that prevent discharges and run-on and also that
capture any overspray;and
e. Drain fluids from equipment and vehicles that will be decommissioned, and,for
any equipment and vehicles that will remain unused for extended periods of
time, inspect at least monthly forleaks.
Note: Industrial materials do not need to be enclosed or covered if stormwater from
affected areas does not discharge pollutants to waters of the United States or if
discharges are authorized under another NPDES permit.
2.1.2.2 Good Housekeeping. You must keep clean all exposed areas that are potential
sources of pollutants. You must perform good housekeeping measures in order to
minimize pollutant discharges, including but not limited to, the following:
a. Sweep or vacuum at regular intervals or, alternatively, wash down the area and
collect and/or treat, and properly dispose of the washdown water;
8 BPT is Best Practicable Control Technology Currently Available, as set forth in CWA section 304(b)(1) and
Appendix A; BAT is Best Available Technology Economically Achievable, as set forth in CWA section
304(b)(2) and Appendix A; and BCT is Best Conventional Pollutant Control Technology, as set forth in CWA
section 304(b)(4) and Appendix A.
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2021 MSGP Permit Parts 1-7 (as modified)
b. Store materials in appropriate containers;
C. Keep all dumpster lids closed when not in use. For dumpsters and roll off boxes
that do not have lids and could leak, ensure that discharges have a control (e.g.,
secondary containment, treatment). Consistent with Part 1.2.2 above,this permit
does not authorize dry weather discharges from dumpsters or roll off boxes;*
d. Minimize the potential for waste, garbage and floatable debris to be discharged
by keeping exposed areas free of such materials, or by intercepting them before
they are discharged.
e. Plastic Materials Requirements: Facilities that handle pre-production plastic must
implement control measures to eliminate discharges of plastic in stormwater.9
Examples of plastic material required to be addressed as stormwater pollutants
include plastic resin pellets, powders, flakes, additives, regrind, scrap, waste and
recycling.
2.1.2.3 Maintenance.
a. Maintenance Activities. You must maintain all control measures that are used
to achieve the effluent limits in this permit in effective operating condition, as
well as all industrial equipment and systems, in order to minimize pollutant
discharges.This includes:
ii. Performing inspections and preventive maintenance of stormwater
drainage, source controls, treatment systems, and plant equipment and
systems that could fail and result in discharges of pollutants via
stormwater.
iii. Maintaining non-structural control measures (e.g., keep spill response
supplies available, personnel appropriately trained).
iv. Inspecting and maintaining baghouses at least quarterly to prevent the
escape of dust from the system and immediately removing any
accumulated dust at the base of the exterior baghouse.*
v. Cleaning catch basins when the depth of debris reaches two-thirds (2/3) of
the sump depth, or in line with manufacturer specifications, whichever is
lower, and keeping the debris surface at least six inches below the lowest
outlet pipe.*
b. Maintenance Deadlines.
ii. If you find that your control measures need routine maintenance, you must
conduct the necessary maintenance immediately in order to minimize
pollutant discharges.
9 Examples of appropriate control measures include but are not limited to:installing a containment system,
or other control, at each on-site storm drain discharge point down gradient of areas containing plastic
material, designed to trap all particles retained by a 1 mm mesh screen;using a durable sealed container
designed not to rupture under typical loading and unloading activities at all points of plastic transfer and
storage; using capture devices as a form of secondary containment during transfers, loading, or unloading
plastic materials, such as catch pans, tarps, berms or any other device that collects errant material; having
a vacuum or vacuum-type system for quick cleanup of fugitive plastic material available for employees;for
facilities that maintain outdoor storage of plastic materials,do so in a durable, permanent structure that
prevents exposure to precipitation that could cause the material to be discharged via stormwater.
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2021 MSGP Permit Parts 1-7 (as modified)
iii. If you find that your control measures need to be repaired or replaced, you
must immediately take all reasonable steps to prevent or minimize the
discharge of pollutants until the final repair or replacement is implemented,
including cleaning up any contaminated surfaces so that the material will
not be discharged during subsequent storm events. Final
repairs/replacement of stormwater controls should be completed as soon as
feasible but must be no later than the timeframe established in Part 5.1.3 for
corrective actions, i.e., within 14 days or, if that is infeasible, within 45 days. If
the completion of stormwater control repairs/replacement will exceed the
45 day timeframe, you may take the minimum additional time necessary to
complete the maintenance, provided that you notify the EPA Regional
Office of your intention to exceed 45 days, and document in your SWPPP
your rationale for your modified maintenance timeframe. If a control
measure was never installed, was installed incorrectly or not in accordance
with Parts 2 and/or 8, or is not being properly operated or maintained, you
must conduct corrective action as specified in Part 5.1.
Note: In this context, the term "immediately"means the day you identify that a
control measure needs to be maintained, repaired, or replaced, you must take
all reasonable steps to minimize or prevent the discharge of pollutants until you
can implement a permanent solution. However, if you identify a problem too
late in the work day to initiate action, you must perform the action the
following work day morning. "All reasonable steps" means you must respond to
the conditions triggering the action, such as, cleaning up any exposed
materials that may be discharged in a storm event (e.g., through sweeping,
vacuuming) or making arrangements (i.e., scheduling) for a new SCM to be
installed.
2.1.2.4 Spill Prevention and Response. You must minimize the potential for leaks, spills and other
releases that may be exposed to stormwater and develop plans for effective response
to such spills if or when they occur in order to minimize pollutant discharges. You must
conduct spill prevention and response measures, including but not limited to, the
following:
a. Clean up spills and leaks promptly using dry methods (e.g., absorbents) to
prevent the discharge of pollutants;
b. Use drip pans and absorbents if leaky vehicles and/or equipment are stored
outdoors;
C. Use spill/overflow protection equipment;
d. Plainly label containers (e.g., "Used Oil," "Spent Solvents," "Fertilizers and
Pesticides") that could be susceptible to spillage or leakage to encourage
proper handling and facilitate rapid response if spills or leaksoccur;*
e. Implement procedures for material storage and handling, including the useof
secondary containment and barriers between material storage and traffic
areas, or a similarly effective means designed to prevent the discharge of
pollutants from these areas;
t. Develop training on the procedures for expeditiously stopping, containing,and
cleaning up leaks, spills, and other releases. As appropriate, execute such
procedures as soon as possible;
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g. Keep spill kits onsite, located near areas where spills may occur or where a
rapid response can be made;and
h. Notify appropriate facility personnel when a leak, spill, or other release occurs.
Where a leak, spill or other release containing a hazardous substance or oil in an
amount equal to or in excess of a reportable quantity established under either
40 CFR Part 110, 40 CFR Part 117, or 40 CFR Part 302, occurs during a 24-hour
period, you must notify the National Response Center (NRC) at [phone]
or, in the Washington, DC, metropolitan area, call [phone] in accordance
with the requirements of 40 CFR Part 110, 40 CFR Part 117, and 40 CFR Part 302 as
soon as you have knowledge of the discharge. State or local requirements may
necessitate reporting spills or discharges to local emergency response, public
health, or drinking water supply agencies. Contact information must be in
locations that are readily accessible and available.
2.1.2.5 Erosion and Sediment Controls. To minimize pollutant discharges in stormwater, you
must minimize erosion by stabilizing exposed soils at your facility and placing flow
velocity dissipation devices at discharge locations to minimize channel and
streambank erosion and scour in the immediate vicinity of discharge points. You must
also use structural and non-structural control measures to minimize the discharge of
sediment. If you use polymers and/or other chemical treatments as part of your
controls, you must identifythe polymers and/or chemicals used and the purpose in your
SWPPP. There are many resources available to help you select appropriate SCMs for
erosion and sediment control, including EPA's Stormwater Discharges from
Construction Activities website at: httl2s://www.el2a.gov/npdes/stormwater-discharges-
construction-activities.
2.1.2.6 Management of Stormwater. You must divert, infiltrate, reuse, contain, or otherwise
reduce stormwater to minimize pollutants in your discharges. In selecting, designing,
installing, and implementing appropriate control measures, you are encouraged to
consult with EPA's resources relating to stormwater management, including the sector-
specific Industrial Stormwater Fact Sheet Series,
(httl2s://www.el2a.gov/npdes/stormwater-discharges-industrial-activities#factsheets)
and any similar state or tribal resources.
2.1.2.7 Salt Storage Piles or Piles Containing Salt. You must enclose or cover storage piles of
salt, or piles containing salt, used for deicing or other commercial or industrial purposes,
including maintenance of paved surfaces, in order to minimize pollutant discharges.
You must implement appropriate measures (e.g., good housekeeping, diversions,
containment) to minimize exposure resulting from adding to or removing materials from
the pile. Piles do not need to be enclosed or covered pursuant to this permit if
stormwater from the piles is not discharged or if discharges from the piles are
authorized under another NPDES permit.
2.1.2.8 Employee Training.
a. Types of Personnel Who Require Training. You must train all employees who work
in areas where industrial materials or activities are exposed to stormwater, or
who are responsible for implementing activities necessary to comply with this
permit (e.g., inspectors, maintenance personnel), including all members of your
stormwater pollution prevention team. You must ensure the following personnel
understand the requirements of this permit and their specific responsibilities with
respect to those requirements:
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2021 MSGP Permit Parts 1-7 (as modified)
i. Personnel who are responsible for the design, installation, maintenance,
and/or repair of controls (including pollution prevention measures);
ii. Personnel responsible for the storage and handling of chemicals and
materials that could become pollutants discharged via stormwater;
iii. Personnel who are responsible for conducting and documenting
inspections and monitoring as required in Parts 3 and 4;and
iv. Personnel who are responsible for taking and documenting corrective
actions as required in Part 5.
b. Areas of Required Training. Personnel must be trained in at least the following if
related to the scope of their job duties (e.g., only personnel responsible for
conducting inspections need to understand how to conduct inspections):
i. An overview of what is in the SWPPP;
ii. Spill response procedures, good housekeeping, maintenance
requirements, and material management practices;
iii. The location of all the controls required by this permit, and how they are to
be maintained;
iv. The proper procedures to follow with respect to the permit's pollution
prevention requirements; and
v. When and how to conduct inspections, record applicable findings, and
take corrective actions; and
vi. The facility's emergency procedures, if applicable per Part 2.1.1.8.
2.1.2.9 Non-Stormwater Discharges. You must evaluate for the presence of non-stormwater
discharges. You must eliminate any non-stormwater discharges not explicitly authorized
in Part 1.2.2 or covered by another NPDES permit, including vehicle and
equipment/tank wash water (except for those authorized in Part 1.2.2.3 for Sectors G,
H, and J). If not covered under a separate NPDES permit, wastewater, wash water and
any other unauthorized non-stormwater must be discharged to a sanitary sewer in
accordance with applicable industrial pretreatment requirements, or otherwise
disposed of appropriately.
2.1.2.10 Dust Generation and Vehicle Tracking of Industrial Materials. You must minimize
generation of dust and off-site tracking of raw, final, or waste materials in order to
minimize pollutants discharged via stormwater.
2.1.3 Numeric Effluent Limitations Based on Effluent Limitations Guidelines. If you are in an
industrial category subject to one of the effluent limitations guidelines identified in Table
4-3 (see Part 4.2.3.1), you must meet the effluent limits referenced in Table 2-1 below:
Table 2-1. Applicable Effluent Limitations Guidelines
Regulated Activity 40 CFR Part/Subpart Effluent Limit
Discharges resulting from spray down or intentional Part 429, Subpart I See Part 8.A.8
wetting of logs at wet deck storage areas
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Regulated Activity 40 CFR Part/Subpart Effluent Limit
Runoff from phosphate fertilizer manufacturing facilities Part 418, Subpart A See Part 8.C.5
that comes into contact with any raw materials,
finished product, by-products or waste products (SIC
2874)
Runoff from asphalt emulsion facilities Part 443, Subpart A See Part 8.D.5
Runoff from material storage piles at cement Part 411, Subpart C See Part 8.E.6
manufacturing facilities
Mine dewatering discharges at crushed stone, Part 436, Subparts B, See Part
construction sand and gravel, or industrial sand mining C, or D 8.J.10
facilities
Runoff from hazardous waste landfills Part 445, Subpart A See Part 8.K.7
Runoff from non-hazardous waste landfills Part 445, Subpart B See Part
81.11
Runoff from coal storage piles at steam electric Part 423 See Part 8.0.8
generating facilities
Runoff containing urea from airfield pavement deicing Part 449 See Part 8.S.9
at existing and new primary airports with 1,000 or more
annual non-propeller aircraft departures
2.2 Water Quality-Based Effluent Limitations
2.2.1 Water Quality Standards. Your discharge must be controlled as necessary to meet
applicable water quality standards of all affected states.
EPA expects that compliance with the conditions in this permit will control discharges
as necessary to meet applicable water quality standards. If at any time you become
aware, or EPA determines, that your stormwater discharge will not be controlled as
necessary such that the receiving water of the United States will not meet an
applicable water quality standard, you must take corrective actions) as required in
Part 5.1 and document the corrective actions as required in Part 5.3. You must also
comply with any additional requirements that your state or tribe requires in Part 9.
EPA may also require that you undertake additional control measures (to meet the
narrative water quality-based effluent limit above) on a site-specific basis, or require
you to obtain coverage under an individual permit, if information in your NOI, required
reports, or from other sources indicates that your discharges are not controlled as
necessary such that the receiving water of the United States will not meet applicable
water quality standards. You must implement all measures necessary to be consistent
with an available wasteload allocation in an EPA-established or approved TMDL.
2.2.2 Discharges to Water Quality-Impaired Waters. You are considered to discharge to an
impaired water if the first water of the United States to which your discharge is
identified by a state, tribe or EPA as not meeting an applicable water quality standard,
and:
• Requires development of a TMDL (pursuant to section 303(d) of theCWA);
• Is addressed by an EPA-approved or established TMDL;or
• Is not in either of the above categories but the waterbody is covered by a pollution
control program that meets the requirements of 40 CFR 130.7(b)(1).
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Note: For discharges that enter a separate storm sewer system 10 prior to discharge,
the first water of the United States to which you discharge is the waterbody that
receives the water from the storm sewer system.
2.2.2.1 Existing Discharge to an Impaired Water with an EPA-Approved or Established TMDL. If
you discharge to an impaired water with an EPA-approved or established TMDL, EPA
will inform you whether any additional measures are necessary for your discharge to be
consistent with the assumptions and requirements of the applicable TMDL and its
wasteload allocation, or if coverage under an individual permit is necessary per Part
1.3.8.
2.2.2.2 Existing Discharger to an Impaired Water without an EPA-Approved or Established TMDL.
If you discharge to an impaired water without an EPA-approved or established TMDL,
you are still required to comply with Part 2.2.1 and the monitoring requirements of Part
4.2.5.1. Note that the impaired waters monitoring requirements of Part 4.2.5.1 also apply
where EPA determines that your discharge is not controlled as necessary such that the
receiving water of the United States will not meet applicable water quality standards in
an impaired downstream water segment, even if your discharge is initially to a
receiving water(s) that is not identified as impaired according to Part 2.2.2.
2.2.2.3 New Discharger or New Source to an Impaired Water. If your authorization to discharge
under this permit relied on Part 1.1.6.2 for a new discharger or a new source to an
impaired water, you must implement and maintain any measures that enabled you to
become eligible under Part 1.1.6.2, and modify such measures as necessary pursuant
to any Part 5 corrective actions. You also must comply with Part 2.2.1 and the
monitoring requirements of Parts 4.2.5.1 .
2.2.3 Tier 2 Antidegradation Requirements for New Dischargers, New Sources, or Increased
Discharges. If you are a "new discharger" or a "new source" (as defined in Appendix
A), or an existing discharger required to notify EPA of an increased discharge consistent
with Part 7.6 (i.e., a "planned changes" report), and you discharge directly to waters
designated by a state or tribe as Tier 2 or Tier 2.5 for antidegradation purposes under 40
CFR 131.12(a), EPA may require that you undertake additional control measures as
necessary to ensure compliance with the applicable antidegradation requirements, or
notify you that an individual permit application is necessary in accordance with Part
1.3.8. See list of Tier 2 and 2.5 waters in Appendix L.
2.3 Requirements Relating to Endangered Species, Historic Properties, and CERCLA Sites
If your eligibility under either Part 1.1.4, Part 1.1.5, and/or Part 1.1.7 was made possible
through your, or another operator's, agreement to undertake additional measures, you
must comply with all such measures to maintain eligibility under the MSGP. Note that if
at any time you become aware, or EPA determines, that your discharges and/or
discharge-related activities have the potential to adversely affect listed species and/or
critical habitat, have an effect on historic properties, or that your facility discharges to
a CERCLA Site listed in Appendix P after you have obtained coverage under this
permit, EPA may inform you of the need to implement additional measures on a site-
specific basis to meet the effluent limits in this permit, or require you to obtain coverage
under an individual permit.
10 Separate storm systems include both municipal storm sewer systems (MS4s) and non-municipal separate
storm sewers.Separate storm systems do not include combined sewer systems or sanitary sewer systems.
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2021 MSGP Permit Parts 1-7 (as modified)
3. Inspections
3.1 Routine Facility Inspections
3.1.1 Inspection Personnel. Qualified personnel (as defined in Appendix A) must perform the
inspections.The qualified personnel may be a member of your stormwater pollution
prevention team, or if the qualified personnel is a third-party you hire (i.e., a
contractor), at least one member of your stormwater pollution prevention team must
participate in the inspection. Inspectors must consider the results of visual and
analytical monitoring (if any) for the past year when planning and conducting
inspections.
3.1.2 Areas that You Must Inspect. During normal facility operating hours, the qualified
personnel must conduct inspections of areas of the facility covered by the
requirements in this permit, including, but not limited to, the following:
3.1.2.1 Areas where industrial materials or activities are exposed to stormwater;
3.1.2.2 Areas identified in the SWPPP and those that are potential pollutant sources (see Part
6.2.3);
3.1.2.3 Areas where spills and leaks have occurred in the past three years;
3.1.2.4 Discharge points; and
3.1.2.5 Control measures used to comply with the effluent limits contained in this permit.
3.1.3 What You Must Look for During an Inspection. During the inspection, the qualified
personnel must examine or look out for, including, but not limited to, the following:
3.1.3.1 Industrial materials, residue or trash that may have or could come into contact with
stormwater;
3.1.3.2 Leaks or spills from industrial equipment, drums, tanks and othercontainers;
3.1.3.3 Offsite tracking of industrial or waste materials, or sediment where vehicles enter or exit
the site;
3.1.3.4 Tracking or blowing of raw, final or waste materials from areas of no exposureto
exposed areas;
3.1.3.5 Erosion of soils at your facility, channel and streambank erosion and scour in the
immediate vicinity of discharge points, per Part 2.1.2.5;
3.1.3.6 Non-authorized non-stormwater discharges, per Part 2.1.2.9;
3.1.3.7 Control measures needing replacement, maintenance orrepair; and
3.1.3.8 During an inspection occurring during a stormwater event or stormwater discharge,
you must observe control measures implemented to comply with effluent limits to
ensure they are functioning correctly. You must also observe discharge points, as
defined in Appendix A, during this inspection. If such discharge locations are
inaccessible, you must inspect nearby downstream locations.
3.1.4 Inspection Frequency. The qualified personnel must conduct inspections at least
quarterly (i.e., once each calendar quarter), or in some instances more frequently
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2021 MSGP Permit Parts 1-7 (as modified)
(e.g., monthly). Increased frequency may be appropriate for some types of
equipment, processes and stormwater control measures, or areas of the facility with
significant activities and materials exposed to stormwater. At least once each
calendar year, the routine inspection must be conducted during a period when a
stormwater discharge is occurring.
3.1.5 Exceptions to Routine Facility Inspections for Inactive and Unstaffed Facilities.The
requirement to conduct facility inspections on a routine basis does not apply at a
facility that is inactive and unstaffed, as long as there are no industrial materials or
activities exposed to stormwater. Such a facility is only required to conduct an annual
site inspection in accordance with Part 3.1. To invoke this exception, you must indicate
that your facility is inactive and unstaffed on your NOI. If you are already covered
under the permit and your facility has changed from active to inactive and unstaffed,
you must modify and re-certify your NOI. You must also include a statement in your
SWPPP per Part 6.2.5.2 indicating that the site is inactive and unstaffed, and that there
are no industrial materials or activities exposed to stormwater, in accordance with the
substantive requirements in 40 CFR 122.26(g)(4)(iii). The statement must be signed and
certified in accordance with Appendix B, Subsection 11. If circumstances change and
industrial materials or activities become exposed to stormwater or your facility
becomes active and/or staffed, this exception no longer applies, and you must
immediately resume routine facility inspections. If you are not qualified for this
exception at the time you become authorized under this permit, but during the permit
term you become qualified because your facility becomes inactive and unstaffed,
and there are no industrial materials or activities exposed to stormwater, you must
include the same signed and certified statement as above and retain it with your
records pursuant to Part6.5.
Inactive and unstaffed facilities covered under Sectors G (Metal Mining), H (Coal Mines
and Coal Mining-Related Facilities), and J (Non-Metallic Mineral Mining and Dressing)
are not required to meet the "no industrial materials or activities exposed to
stormwater" standard to be eligible for this exception from routine inspections, per Parts
8.G.8.5, 8.H.9.1, and 8.J.9.1.
3.1.6 Routine Facility Inspection Documentation. You must document the findings of your
facility inspections and maintain this report with your SWPPP as required in Part 6.5. You
must conduct any corrective action required as a result of a routine facility inspection
consistent with Part 5. If you conducted a discharge visual assessment required in Part
3.2 during your facility inspection, you may include the results of the assessment with
the report required in this Part, as long as you include all components of both types of
inspections in the report.
Do not submit your routine facility inspection report to EPA, unless specifically requested
to do so. However, you must summarize your findings in the Annual Report per Part 7.4.
Document all findings, including but not limited to, the following information.
3.1.6.1 The inspection date and time;
3.1.6.2 The name(s) and signature(s) of theinspector(s);
3.1.6.3 Weather information;
3.1.6.4 All observations relating to the implementation of stormwater control measures at the
facility, including:
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2021 MSGP Permit Parts 1-7 (as modified)
a. A description of any stormwater discharges occurring at the time of the
inspection;
b. Any previously unidentified stormwater discharges from and/or pollutants at
the facility;
c. Any evidence of, or the potential for, pollutants entering the stormwater
drainage system;
d. Observations regarding the physical condition of and around all stormwater
discharge points, including any flow dissipation devices, and evidence of
pollutants in discharges and/or the receiving water;
e. Any stormwater control measures needing maintenance, repairs, or
replacement;
3.1.6.5 Any additional stormwater control measures needed to comply with the permit
requirements;
3.1.6.6 Any incidents of noncompliance;and
3.1.6.7 A statement, signed and certified in accordance with Appendix B,Subsection 11.
3.2 Quarterly Visual Assessment of Stormwater Discharges
3.2.1 Visual Assessment Frequency. Once each quarter for your entire permit coverage, you
must collect a stormwater sample from each discharge point (except as noted in Part
3.2.4) and conduct a visual assessment of each of these samples. These samples are
not required to be collected consistent with 40 CFR Part 136 procedures but must be
collected in such a manner that the samples are representative of the stormwater
discharge. Guidance on monitoring is available at
httl2s://www.el2a.-gov/sites/12roduction/files/2015-
11/documents/msgp monitorina auide.pdf.
3.2.2 Visual Assessment Procedures. You must do the following for the quarterly visual
assessment:
3.2.2.1 Make the assessment of a stormwater discharge sample in a clean, colorless glass or
plastic container, and examined in a well-lit area;
3.2.2.2 Make the assessment of the sample you collected within the first 30 minutes of an
actual discharge from a storm event. If it is not possible to collect the sample within the
first 30 minutes of discharge, the sample must be collected as soon as practicable after
the first 30 minutes and you must document why it was not possible to take the sample
within the first 30 minutes. In the case of snowmelt, samples must be taken during a
period with a measurable discharge;and
3.2.2.3 For storm events, make the assessment on discharges that occur at least 72 hours
(three days) from the previous discharge. The 72-hour (three-day) storm interval does
not apply if you document that less than a 72-hour (three-day) interval is representative
for local storm events during the sampling period.
3.2.2.4 Visually inspect or observe for the following water quality characteristics, which may be
evidence of stormwater pollution:
a. Color;
b. Odor;
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2021 MSGP Permit Parts 1-7 (as modified)
C. Clarity (diminished);
d. Floating solids;
e. Settled solids;
f. Suspended solids;
g. Foam;
h. Oil sheen; and
i. Other obvious indicators of stormwater pollution.
3.2.2.5 Whenever the visual assessment shows evidence of stormwater pollution in the
discharge, you must initiate the corrective action procedures in Part 5.1.1.
3.2.3 Visual Assessment Documentation. You must document the results of your visual
assessments and maintain this documentation onsite with your SWPPP as required in
Part 6.5. Any corrective action required as a result of a quarterly visual assessment must
be conducted consistent with Part 5 of this permit. You are not required to submit your
visual assessment findings to EPA, unless specifically requested to do so. However, you
must summarize your findings in the annual report per Part 7.4. Your documentation of
the visual assessment must include, but not be limited to:
3.2.3.1 Sample location(s);
3.2.3.2 Sample collection date and time, and visual assessment date and time for each
sample;
3.2.3.3 Personnel collecting the sample and conducting visual assessment, and their
signatures;
3.2.3.4 Nature of the discharge (i.e., stormwater from rain orsnow);
3.2.3.5 Results of observations of the stormwater discharge;
3.2.3.6 Probable sources of any observed stormwater contamination;
3.2.3.7 If applicable, why it was not possible to take samples within the first 30 minutes; and
3.2.3.8 A statement, signed and certified in accordance with Appendix B,Subsection 11.
3.2.4 Exceptions to Quarterly Visual Assessments
3.2.4.1 Adverse Weather Conditions. When adverse weather conditions prevent the collection
of stormwater discharge sample(s) during the quarter, you must take a substitute
sample during the next qualifying storm event. Documentation of the rationale for no
visual assessment for the quarter must be included with your SWPPP records as
described in Part 6.5. Adverse conditions are those that are dangerous or create
inaccessibility for personnel, such as local flooding, high winds, electrical storms, or
situations that otherwise make sampling impractical, such as extended frozen
conditions.
3.2.4.2 Climates with Irregular Stormwater Discharges. If your facility is located in an area
where limited rainfall occurs during many parts of the year (e.g., and or semi-arid
climate) or in an area where freezing conditions exist that prevent discharges from
occurring for extended periods, then your samples for the quarterly visual assessments
may be distributed during seasons when precipitation more regularly occurs.
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2021 MSGP Permit Parts 1-7 (as modified)
3.2.4.3 Areas that Receive Snow. If the facility is in an area that typically receives snow and the
facility receives snow at least once over a period of four quarters, at least one quarterly
visual assessment must capture snowmelt discharge, as described in Part 4.1.3, taking
into account the exception described above for climates with irregular stormwater
discharges.
3.2.4.4 Inactive and Unstaffed Facilities.The requirement for a quarterly visual assessment does
not apply at a facility that is inactive and unstaffed, as long as there are no industrial
materials or activities exposed to stormwater. To invoke this exception, you must
maintain a statement in your SWPPP per Part 6.2.5.2 indicating that the site is inactive
and unstaffed, and that there are no industrial materials or activities exposed to
precipitation, in accordance with the substantive requirements in 40 CFR
122.26(g)(4)(iii). The statement must be signed and certified in accordance with
Appendix B, Subsection 11. If circumstances change and industrial materials or
activities become exposed to stormwater or your facility becomes active and/or
staffed, this exception no longer applies, and you must immediately resume quarterly
visual assessments. If you are not qualified for this exception at the time you are
authorized under this permit, but during the permit term you become qualified
because your facility becomes inactive and unstaffed, and there are no industrial
materials or activities that are exposed to stormwater, then you must include the same
signed and certified statement as above and retain it with your records pursuant to
Part 6.5. Inactive and unstaffed facilities covered under Sectors G (Metal Mining), H
(Coal Mines and Coal Mining-Related Facilities), and J (Non-Metallic Mineral Mining
and Dressing), are not required to meet the "no industrial materials or activities
exposed to stormwater" standard to be eligible for this exception from quarterly visual
assessments, consistent with the requirements established in Parts 8.G.8.5, 8.H.9.1, and
8.J.9.1.
3.2.4.5 Substantially Identical Discharge Points (SIDP). If your facility has two or more discharge
points that discharge substantially identical stormwater effluents, as documented in
Part 6.2.5.3, you may conduct quarterly visual assessments of the discharge at just one
of the discharge points and report that the results also apply to the SIDPs provided that
you conduct visual assessments on a rotating basis of each SIDP throughout the period
of your coverage under this permit. If stormwater contamination is identified through
visual assessment conducted at a SIDP, you must assess and modify your stormwater
control measures as appropriate for each discharge point represented by the
monitored discharge point.
4. Monitoring
You must collect and analyze stormwater samples and document monitoring activities
consistent with the procedures described in Part 4 and Appendix B, Subsections B.10-
12, and any additional sector-specific or state/tribal-specific requirements in Parts 8
and 9, respectively. Refer to Part 7 for reporting and recordkeeping requirements.
4.1 Monitoring Procedures
4.1.1 Monitored Stormwater Discharge Points. Applicable monitoring requirements apply to
each discharge point authorized by this permit, except as otherwise exempt from
monitoring as a "substantially identical discharge point" (SIDP). If your facility has two or
more discharge points that you believe discharge substantially identical stormwater
effluents, based on the similarities of the general industrial activities and control
measures, exposed materials that may significantly contribute pollutants to stormwater,
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2021 MSGP Permit Parts 1-7 (as modified)
and runoff coefficients of their drainage areas, you may monitor the effluent of just one
of the discharge points and report that the results also apply to the SIDP(s). As required
in Part 6.2.5.3, your SWPPP must identify each discharge point authorized by this permit
and describe the rationale for any SIDP determinations. The allowance for monitoring
only one of the SIDP is not applicable to any discharge points with numeric effluent
limitations. You are required to monitor each discharge point covered by a numeric
effluent limit as identified in Part 4.2.3.
4.1.2 Commingled Discharges. If any authorized stormwater discharges commingle with
discharges not authorized under this permit, you must conduct any required sampling
of the authorized discharges at a point before they mix with other waste streams, to the
extent practicable.
4.1.3 Measurable Storm Events. You must conduct all required monitoring on a storm event
that results in an actual discharge ("measurable storm event") that follows the
preceding measurable storm event by at least 72 hours (three days).The 72-hour (3-
day) storm interval does not apply if you are able to document that less than a 72-hour
(3-day) interval is representative for local storm events during the sampling period. In
the case of snowmelt, you must conduct monitoring at a time when a measurable
discharge occurs.
For each monitoring event, except snowmelt monitoring, you must identify the date
and duration (in hours) of the rainfall event, rainfall total (in inches) for that rainfall
event, and time (in days) since the previous measurable storm event. For snowmelt
monitoring, you must identify the date of the sampling event.
4.1.4 Sample Type. You must take a minimum of one grab sample from a discharge resulting
from a measurable storm event as described in Part 4.1.3. You must collect samples
within the first 30 minutes of a discharge associated with a measurable storm event. If it
is not possible to collect the sample within the first 30 minutes of a measurable storm
event, you must collect the sample as soon as possible after the first 30 minutes and
keep documentation with the SWPPP explaining why it was not possible to take
samples within the first 30 minutes. In the case of snowmelt, you must take samples
during a period with a measurable discharge.
For indicator monitoring and benchmark monitoring, you may choose to use a
composite sampling method instead of taking grab samples. This composite method
may be either flow-weighted or time-weighted and performed manually or with the
use of automated sampling equipment. For the purposes of this permit, a flow-
weighted composite sample means a composite sample consisting of a mixture of
aliquots collected at a constant or variable time interval, where the volume of each
aliquot included in the composite sample is proportional to the estimated or measured
incremental discharge volume at the time of the aliquot collection compared to the
total discharge volume estimated or measured over the monitoring event. For the
purposes of this permit, a time-weighted composite sample means a composite
sample consisting of a mixture of equal volume aliquots collected at a regular defined
time interval over a specific period of time. Composite sampling must be initiated
during the first 30 minutes of the same storm event. If it is not possible to initiate
composite sampling within the first 30 minutes of a measurable storm event, you must
initiate composite sampling as soon as possible after the first 30 minutes and keep
documentation with the SWPPP explaining why it was not possible to initiate composite
sampling within the first 30 minutes. You must submit all monitoring results to EPA per
Part 4.1.9. Composite sampling may not be used in situations where hold times for
processing or sample preservation requirements cannot be satisfied. For parameters
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2021 MSGP Permit Parts 1-7 (as modified)
measured in-situ with a probe or meter such as dissolved oxygen, conductivity, pH, or
temperature, the composite sampling method shall be modified by calculating an
average all individual measurements, weighted by flow volume if applicable.
4.1.5 Adverse Weather Conditions. When adverse weather conditions as described in Part
3.2.4.1 prevent the collection of stormwater discharge samples according to the
relevant monitoring schedule, you must take a substitute sample during the next
qualifying storm event. Adverse weather does not exempt you from having to file a
benchmark monitoring report in accordance with your sampling schedule. As specified
in Part 7.3.4, you must indicate in Net-DMR any failure to monitor during the regular
reporting period.
4.1.6 Facilities in Climates with Irregular Stormwater Discharges. If your facility is located in
areas where limited rainfall occurs during parts of the year (e.g., and or semi-arid
climates) or in areas where freezing conditions exist that prevent discharges from
occurring for extended periods, you may distribute your required monitoring events
during seasons when precipitation occurs, or when snowmelt results in a measurable
discharge from your facility. You must still collect the required number of samples. As
specified in Part 7.3.4, you must also indicate in Net-DMR that there was no monitoring
for the respective monitoring period.
4.1.7 Monitoring Periods. Your monitoring requirements in this permit begin in the first full
quarter following either May 30, 2021 or your date of discharge authorization, whichever
date comes later.
• January 1 -March 31
• April 1 -June 30
• July 1 -September 30
• October 1 -December 31
For example, if you obtain permit coverage on April 10, 2021, then your first monitoring
quarter for benchmark monitoring is July 1, 2021 -September 30, 2021 and your first
monitoring year for discharges to impaired waters or discharges subject to an effluent
limitation guideline is July 1, 2021 -June 30, 2022. This monitoring schedule may be
modified in accordance with Part 4.1.6 if you document the revised schedule in your
SWPPP. However, you must indicate in Net-DMR any 3-month interval that you did not
take a sample.
4.1.8 Monitoring for Authorized Non-Stormwater Discharges. You are only required to monitor
authorized non-stormwater discharges (as delineated in Part 1.2.2) when they are
commingled with stormwater discharges associated with industrial activity.
4.1.9 Monitoring Reports. You must report monitoring data using Net-DMR, EPA's electronic
DMR tool, as described in Part 7.3 (unless the applicable EPA Regional Office grants
you a waiver from electronic reporting, in which case you may submit a paper DMR
form).
4.2 Required Monitorinq
This permit includes six types of required analytical monitoring, one or more of which
may apply to your stormwater discharge:
• Indicator monitoring (Part 4.2.1);
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2021 MSGP Permit Parts 1-7 (as modified)
• Benchmark monitoring (Part4.2.2);
• Annual effluent limitations guidelines monitoring (Part4.2.3);
• State- or tribal-specific monitoring (Part4.2.4);
• Impaired waters monitoring (Part 4.2.5);and
• Other monitoring as required by EPA (Part4.2.6).
Unless otherwise specified, samples must be analyzed consistent with 40 CFR Part 136
analytical methods that are sufficiently sensitive for the monitored parameter. When
more than one type of monitoring for the same pollutant at the same discharge point
applies (e.g., total suspended solids once per year for an effluent limitation and once
per quarter for benchmark monitoring at a given discharge point), you may use a
single sample to satisfy both monitoring requirements (i.e., one sample satisfying both
the annual effluent limitation sample and one of the four quarterly benchmark
monitoring samples). Similarly, when the same type of monitoring is required for the
same pollutant but for different activities, you may use a single sample to satisfy both
monitoring requirements (i.e., when you are required to monitor for PAHs in stormwater
discharges from paved surfaces that will be sealed or re-sealed with coal-tar sealcoat
where industrial activities are located during coverage under this permit and you are
also required to monitor for PAHs in stormwater discharges since you manufacture, use,
or store creosote or creosote-treated wood in areas that are exposed to precipitation).
When the effluent limitation is lower than the benchmark threshold for the same
pollutant, your Additional Implementation Measure (AIM) trigger is based on an
exceedance of the effluent limitation threshold, which would subject you to the AIM
requirements of Part 5.2. Exceedance of an effluent limitation associated with the
results of any analytical monitoring type required by this Part subjects you to the
corrective action requirements of Part 5.1. You must conduct all required monitoring in
accordance with the procedures described in Appendix B, Subsection B.10.
Per Part 1.3.7, in the event that the permit is administratively continued, monitoring
requirements remain in force and effect at their original frequency during any
continuance for operators that were covered prior to permit expiration. In the event
that monitoring results are unable to be electronically reported in Net-DMR, operators
must maintain monitoring results and records within their SWPPP.
Table 4-1. Summary of Each Type of Monitoring
Monitoring Type Monitoring Type Applies Frequency Duration Follow- Permit Part
To up Reference
Action
Indicator-pH,TSS, Subsectors 132, C5, D2, E3, Quarterly Entirety of None Part
COD F5, 11, J3, L2, N2, 01, P1, permit 4.2.1.1a
R1,T1, U3, V1, W1,X1,Y2, coverage
Z1, AB1,AC1, and AD1
Indicator-PAHs* Operators with Bi-annually First year None Part
stormwater discharges (2 times per and fourth 4.2.1.1 b
from paved surfaces that year) year
will be sealed or re-sealed
with coal-tar sealcoat
where industrial activities
are located during
coverage under this
permit;sectors;Sector A
facilities that
manufacture, use,or
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2021 MSGP Permit Parts 1-7 (as modified)
Monitoring Type Monitoring Type Applies Frequency Duration Follow- Permit Part
To up Reference
Action
store creosote or
creosote-treated wood in
areas that are exposed to
precipitation;and Sectors
C (SIC 2911), D, F, H, I, M,
O, P (SIC 4011,4013,and
5171),Q (SIC 4493), R,
and S
Benchmark Subsectors Al, A2, A3,A4, Quarterly First year AIM.See Part 4.2.2
B1, C1, C2, C3, C4, D1, El, and fourth Part 5.2.
E2, F1, F2, F3, F4,G1,G2, year
H1, J1, J2, K1, L1, M1, N1,
Q1,S1, U1, U2,Y1,AA1,
AA2
Effluent limitation See Part 4.2.3 Annually Entirety of See Part Part 4.2.3
guidelines (ELG) permit 5.1
covera e
State-or tribal- Depends on the discharge location of your facility.See Part 9
specific
Impaired Waters Depends on the receiving waterbod .See Part 4.2.5
Other as required by See Part 4.2.6
EPA
Monitoring is required for the 16 individual PAHs identified at Appendix A to 40 CFR Part 423:naphthalene,
acenaphthylene,acenaphthene,fluorene,phenanthrene,anthracene,fluoranthene,pyrene,
benzo[a]anthracene,chrysene,benzo[b]fluoranthene,benzo[k]fluoranthene,benzo[a]pyrene,
benzo[g,h,i]perylene,indeno[1,2,3-c,d]pyrene,and dibenz[a,h]anthracene.
4.2.1 Indicator Monitoring. This permit requires indicator monitoring of stormwater discharges
for three parameters-pH, Total Suspended Solids (TSS), and Chemical Oxygen
Demand (COD) -for certain sectors/subsectors (see Part 4.2.1.1.a below) and for
polycyclic aromatic hydrocarbons (PAHs) for certain sectors/activities, with additional
limitations (see Part 4.2.1.1.b below). Indicator monitoring data will provide you and
EPA with a baseline and comparable understanding of industrial stormwater discharge
quality and potential water quality problems.The indicator monitoring parameters are
"report-only" and do not have thresholds or baseline values for comparison, therefore
no follow-up action is triggered or required under this part.The requirement in Part 2.2.1
that your stormwater discharge be controlled as necessary such that the receiving
water of the United States will meet applicable water quality standards still applies. You
may find it useful to evaluate and compare your indicator monitoring data over time
to identify any fluctuating values and why they may be occurring, and to further inform
any revisions to your SWPPP/SCMs if necessary.'' Indicator monitoring is report-only and
is neither benchmark monitoring nor an effluent limitation. Instead, it is a permit
condition.Thus, failure to conduct indicator monitoring is a permit violation.
" Examples of possible reviews and revisions to the SWPPP/SCMs that could be informed by indicator
monitoring values include:reviewing sources of pollution or any changes to performed industrial activities
and processes;reviewing spill and leak procedures,and/or non-stormwater discharges;conducting a
single comprehensive clean-up,implementing a new control measure,and/or increasing inspections. EPA
notes, however, that these actions are not required under the 2021 MSGP in response to indicator
monitoring.
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2021 MSGP Permit Parts 1-7 (as modified)
4.2.1.1 Applicability and Schedule of Indicator Monitoring
a. pH, Total Suspended Solids (TSS), and Chemical Oxygen Demand (COD)
i. Applicability. Operators in the following subsectors must monitor stormwater
discharges for pH, TSS, and COD (also specified in the sector-specific
requirements in Part 8): B2, C5, D2, E3, F5, 11, J3, L2, N2, 01, P 1, R 1, T1, U3, V 1,
W1, X1, Y2, Z1, ABI, ACI, and AD1). Samples must be analyzed consistent with
40 CFR Part 136 analytical methods.
ii. Schedule. You must conduct indicator monitoring of stormwater discharges
for pH, TSS, and COD each quarter, beginning in your first full quarter of permit
coverage as identified in Part 4.1.7.
b. Polycyclic Aromatic Hydrocarbons (PAHs)
i. Applicability.The following operators must monitor stormwater discharges for
the 16 individual priority pollutant PAHs (also specified in the sector-specific
requirements in Part 8): operators in all sectors with stormwater discharges
from paved surfaces that will be sealed or re-sealed with coal-tar sealcoat
where industrial activities are located during coverage under this permit;
operators in sectors A (facilities that manufacture, use, or store creosote or
creosote-treated wood in areas that are exposed to precipitation), C (SIC
Code 2911), D, F, H, I, M, O, P (SIC Codes 4011, 4013, and 5171), Q (SIC Code
4493), R, and S. Monitoring is required for the 16 individual PAHs identified at
Appendix A to 40 CFR Part 423: naphthalene, acenaphthylene,
acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene,
benzo[a]anthracene, chrysene, benzo[b]fluoranthene, benzo[k]fluoranthene,
benzo[a]pyrene, benzo[g,h,i]perylene, indeno[1,2,3-c,d]pyrene, and
dibenz[a,h]anthracene. Samples must be analyzed using EPA Method 625.1,
or EPA Method 610/Standard Method 6440B if preferred by the operator,
consistent with 40 CFR Part 136 analytical methods.
ii. Schedule. You must conduct indicator monitoring of stormwater discharges
for PAHs bi-annually (i.e., sample twice per year) in the first and fourth years of
permit coverage. Your first year of permit coverage begins in your first full
quarter of permit coverage, identified in Part 4.1.7, commencing no earlier
than May 30, 2021, followed by two years of no monitoring. Bi-annual
monitoring resumes in your fourth year of permit coverage for another year,
after which you may discontinue bi-annual PAH monitoring for the remainder
of your permit coverage.
4.2.1.2 Exception for Facilities in Climates with Irregular Stormwater Discharges. As described in
Part 4.1.6, facilities in climates with irregular stormwater discharges may modify this
schedule provided you report this revised schedule directly to EPA by the due date of
the first indicator monitoring sample (see EPA Regional contacts in Part 7.8), and you
keep this revised schedule with the facility's SWPPP as specified in Part 6.5. As noted in
Part 4.1.7, you must indicate in Net-DMR any 3-month interval that you did not take a
sample.
4.2.1.3 Exception for Inactive and Unstaffed Facilities. The requirement for indicator monitoring
does not apply at a facility that is inactive and unstaffed, provided that there are no
industrial materials or activities exposed to stormwater. To invoke this exception, you
must do the following:
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a. Maintain a statement with your SWPPP stating that the site is inactive and
unstaffed, and that there are no industrial materials or activities exposed to
stormwater in accordance with the substantive requirements in 40 CFR 122.26(g)
and sign and certify the statement in accordance with Appendix B, Subsection
11.
b. If circumstances change and industrial materials or activities become exposed to
stormwater or your facility becomes active and/or staffed, this exception no
longer applies and you must immediately begin complying with the applicable
indicator monitoring requirements under Part 4.2.1 as if you were in your first year
of permit coverage. You must indicate in your NOI that your facility has materials
or activities exposed to stormwater or has become active and/or staffed.
C. If you are not qualified for this exception at the time you are authorized under this
permit, but during the permit term you become qualified because your facility is
inactive and unstaffed, and there are no industrial materials or activities that are
exposed to stormwater, then you must notify EPA of this change on your NOI
form. You may discontinue indicator monitoring once you have notified EPA, and
prepared and signed the certification statement described above concerning
your facility's qualification for this special exception.
Note: This exception has different requirements for Sectors G, H, and J (see Part 8).
4.2.2 Benchmark Monitoring.This permit requires benchmark monitoring parameters of
stormwater discharges for certain sectors/subsectors. Benchmark monitoring data are
primarily for your use to determine the overall effectiveness of your stormwater control
measures and to assist you in determining when additional action(s) may be necessary
to comply with the effluent limitations in Part 2.
The benchmark thresholds are not effluent limitations; a benchmark exceedance,
therefore, is not a permit violation. However, if a benchmark exceedance triggers
Additional Implementation Measures (AIM) in Part 5.2, failure to conduct any required
measures is a permit violation. At your discretion, you may take more than four samples
during separate stormwater discharge events to determine the average benchmark
parameter value for facility discharges.
4.2.2.1 Applicability of Benchmark Monitoring
You must monitor stormwater discharges for any benchmark parameters specified for
the industrial sector(s), both primary industrial activity and any co-located industrial
activities, applicable to your discharge listed in Part 8. If your facility is in one of the
industrial sectors subject to benchmark thresholds that are hardness-dependent, you
must include in your NOI a hardness value, established consistent with the procedures
in Appendix J, that is representative of your receiving water. Hardness is not a specific
benchmark and therefore the permit does not include a benchmark threshold with
which to compare.
Samples must be analyzed consistent with 40 CFR Part 136 analytical methods and
using test procedures with quantitation limits at or below benchmark thresholds for all
benchmark parameters for which you are required to sample, i.e., sufficiently sensitive
methods. For averaging purposes, you may use a value of zero for any individual
sample parameter which is determined to be less than the method detection limit. For
sample values that fall between the method detection limit and the quantitation limit
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2021 MSGP Permit Parts 1-7 (as modified)
(i.e., a confirmed detection but below the level that can be reliably quantified), use a
value halfway between zero and the quantitation limit.
4.2.2.2 Summary of the 2021 MSGP Benchmark Thresholds
The Table 4-2 presents the 2021 MSGP's freshwater and saltwater benchmark
thresholds.Sector-specific benchmark requirements are detailed in Part 8. Values
match the original units found in the source documents, detailed in the corresponding
section of the fact sheet.
Table 4-2 2021 MSGP Benchmark Thresholds
Pollutant 2021 MSGP Benchmark Threshold
Total Recoverable Aluminum (T) 1,100 fag/L
Total Recoverable Beryllium 130 fag/L
Biochemical Oxygen Demand (5-day) 30 mg/L
pH 6.0-9.0 s.u.
Chemical Oxygen Demand 120 mg/L
Total Phosphorus 2.0 mg/L
Total Suspended Solids (TSS) 100 mg/L
Nitrate and Nitrite Nitrogen 0.68 mg/L
Turbidity 50 NTU
Total Recoverable Antimony 640 fag/L
Ammonia 2.14 mg/L
Total Freshwatera 1.8 fag/L
Recoverable
Cadmium Saltwater 33 fag/L
Total Freshwater 5.19 fag/L
Recoverable
Copper Saltwater 4.8 fag/L
Total Freshwater 22 fag/L
Recoverable Saltwater 1 fag/L
Cyanide
Total Freshwater 1.4 fag/L
Recoverable
Mercury Saltwater 1.8 fag/L
Total Freshwatera 470 fag/L
Recoverable Saltwater 74 fag/L
Nickel
Total Freshwater 1.5 fag/L for still/standing (lentic)waters
Recoverable 3.1 /L for flowing lotic)waters
Selenium Saltwater 290 fag/L
Total Freshwatera 3.2 fag/L
Recoverable
Silver Saltwater 1.9 fag/L
Total Freshwatera 120 fag/L
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Pollutant 2021 MSGP Benchmark Threshold
Recoverable Saltwater 90 fag/L
Zinc
Total Freshwater 150 fag/L
Recoverable
Arsenic Saltwater 69 fag/L
Total Freshwatera 82 fag/L
Recoverable
Lead Saltwater 210 fag/L
a These pollutants are dependent on water hardness where discharged into
freshwaters.The freshwater benchmark value listed is based on a hardness of 100
mg/L.When a facility analyzes receiving water samples for hardness,the operator
must use the hardness ranges provided in Table 1 in Appendix J of the 2021 MSGP and
in the appropriate tables in Part 8 of the 2021 MSGP to determine applicable
benchmark values for that facility. Benchmark thresholds for discharges of these
pollutants into saline waters are not dependent on receiving water hardness and do
not need to beadjusted.
4.2.2.3 Benchmark Monitoring Schedule. Benchmark monitoring of stormwater discharges is
required quarterly, as identified in Part 4.1.7, in the first and fourth year of permit
coverage, as follows:
a. Year one of permit coverage: You must conduct benchmark monitoring for all
parameters applicable to your subsector(s) for four quarters in your first year of
permit coverage, beginning in your first full quarter of permit coverage, no earlier
than May 30, 2021.
i. If the annual average12 for a parameter does not exceed the benchmark
threshold, you can discontinue benchmark monitoring for that parameter for
the next two years (i.e., eight quarters).
ii. If the annual average for a parameter exceeds the benchmark threshold,
you must comply with Part 5.2 (Additional Implementation Measures
responses and deadlines) and continue quarterly benchmark monitoring for
that parameter until results indicate that the annual average is no longer
exceeded, after which you can discontinue benchmark monitoring for that
parameter until monitoring resumes in year four of permit coverage, per Part
4.2.2.3.b below.
b. Year four of permit coverage: You must conduct benchmark monitoring for all
parameters applicable to your subsector(s) for four quarters in your fourth year of
permit coverage (i.e., your thirteenth through sixteenth quarters), unless the first
quarter of your fourth year of permit coverage occurs on or after the date this
permit expires.
12 For this permit, an annual average exceedance for a parameter can occur if: (a) The four-quarter
annual average for a parameter exceeds the benchmark threshold;or(b) Fewer than four quarterly
samples are collected,but a single sample or the sum of any sample results within the sampling year
exceeds the benchmark threshold by more than four times for a parameter.The result in (b) indicates an
exceedance is mathematically certain (i.e.,the sum of quarterly sample results to date is already more
than four times the benchmark threshold). For pH,an annual average exceedance can only occur if the
four-quarter annual average exceeds the benchmark threshold.
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i. If the annual average13 for a parameter does not exceed the benchmark
threshold, you can discontinue benchmark monitoring for that parameter for
the remainder of your permit coverage.
ii. If the annual average for a parameter exceeds the benchmark threshold,
you must comply with Part 5.2 (Additional Implementation Measures
responses and deadlines) and continue quarterly benchmark monitoring for
that parameter until results indicate that the annual average is no longer
exceeded, after which you can discontinue benchmark monitoring for that
parameter for the remainder of permit coverage.
4.2.2.4 Exception for Facilities in Climates with Irregular Stormwater Discharges. As described in
Part 4.1.6, facilities in climates with irregular stormwater discharges may modify this
quarterly schedule provided you report this revised schedule directly to EPA by the due
date of the first benchmark sample (see EPA Regional contacts in Part 7.8), and you
keep this revised schedule with the facility's SWPPP as specified in Part 6.5. When
conditions prevent you from obtaining four samples in four consecutive quarters, you
must continue monitoring until you have the four samples required for calculating your
benchmark monitoring average. As noted in Part 4.1.7, you must indicate in Net-DMR
any 3-month interval that you did not take a sample.
4.2.2.5 Exception for Inactive and Unstaffed Facilities. The requirement for benchmark
monitoring does not apply at a facility that is inactive and unstaffed, provided that
there are no industrial materials or activities exposed to stormwater.To invoke this
exception, you must do the following:
a. Maintain a statement with your SWPPP stating that the site is inactive and
unstaffed, and that there are no industrial materials or activities exposed to
stormwater in accordance with the substantive requirements in 40 CFR 122.26(g)
and sign and certify the statement in accordance with Appendix B, Subsection
11.
b. If circumstances change and industrial materials or activities become exposed to
stormwater or your facility becomes active and/or staffed, this exception no
longer applies and you must immediately begin complying with the applicable
benchmark monitoring requirements under Part 4.2.2 as if you were in your first
year of permit coverage. You must indicate in your NOI that your facility has
materials or activities exposed to stormwater or has become active and/or
staffed.
C. If you are not qualified for this exception at the time you are authorized under this
permit, but during the permit term you become qualified because your facility is
inactive and unstaffed, and there are no industrial materials or activities that are
exposed to stormwater, then you must notify EPA of this change on your NOI
form. You may discontinue benchmark monitoring once you have notified EPA,
and prepared and signed the certification statement described above
concerning your facility's qualification for this special exception.
Note: This exception has different requirements for Sectors G, H, and J (see Part 8).
13 Ibid.
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2021 MSGP Permit Parts 1-7 (as modified)
4.2.3 Effluent Limitations Monitoring
4.2.3.1 Monitoring Based on Effluent Limitations Guidelines. Table 4-3 identifies the stormwater
discharges subject to effluent limitation guidelines that are authorized for coverage
under this permit. An exceedance of the effluent limitation is a permit violation.
Beginning in the first full quarter following May 30, 2021, or your date of discharge
authorization, whichever date comes later, you must monitor once per year at each
stormwater discharge point containing the discharges identified in Table 4-3 for the
parameters specified in the sector-specific section of Part8.
Table 4-3. Required Monitoring for Effluent Limits Based on Effluent Limitations Guidelines
Monitoring Sample
Regulated Activity Effluent Limit Frequency Type
Discharges resulting from spray down or intentional See Part 8.A.8 1/year Grab
wetting of logs at wet deck storage areas
Runoff from phosphate fertilizer manufacturing See Part 8.C.5 1/year Grab
facilities that comes into contact with any raw
materials, finished product, by-products or waste
products (SIC 2874)
Runoff from asphalt emulsion facilities See Part 8.D.5 1/year Grab
Runoff from material storage piles at cement See Part 8.E.6 1/year Grab
manufacturing facilities
Mine dewatering discharges at crushed stone, See Part 8.J.10 1/year Grab
construction sand and gravel, or industrial sand
mining facilities
Runoff from hazardous waste landfills See Part 8.K.7 1/year Grab
Runoff from non-hazardous waste landfills See Part 81.11 1/year Grab
Runoff from coal storage piles at steam electric See Part 8.0.8 1/year Grab
generating facilities
Runoff containing urea from airfield pavement See Part 8.S.9 1/year Grab
deicing at existing and new primary airports with
1,000 or more annual non- propeller aircraft
departures.
4.2.3.2 Substantially Identical Discharge Points Not Applicable. You must monitor each
discharge point discharging stormwater from any regulated activity identified in Table
4-3.The substantially identical discharge points (SIDP) monitoring provisions are not
available for numeric effluent limit monitoring.
4.2.3.3 Follow-up Actions if Discharge Exceeds Numeric Effluent Limitation. If any monitoring
value exceeds a numeric effluent limitation contained in this permit, you must indicate
the exceedance on a "Change NOI" form in the NPDES eReporting Tool (NeT), and you
must conduct follow-up monitoring within 30 calendar days (or during the next
measurable storm event, should none occur within 30 days) of implementing corrective
action(s) taken per Part 5.1. If your follow-up monitoring exceeds the applicable
effluent limitation, you must:
a. Submit an Exceedance Report: You must submit an Exceedance Report no later
than 30 days after you have received your laboratory result consistent with Part
7.5; and
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b. Continue to Monitor. You must monitor, at least quarterly, until your stormwater
discharge is in compliance with the effluent limit or until EPA waives the
requirement for additional monitoring. Once your discharge is back in
compliance with the effluent limitation you must indicate this on a "Change NOI"
form per Part 7.3.
4.2.4 State or Tribal Required Monitoring
4.2.4.1 Sectors Required to Conduct State or Tribal Monitoring. You must comply with any state
or tribal monitoring requirements in Part 9 of the permit applicable to your facility's
discharge location.
4.2.4.2 State or Tribal Monitoring Schedule. If a monitoring frequency is not specified foran
applicable requirement in Part 9, you must monitor once per year for the duration of
your permit coverage.
4.2.5 Impaired Waters Monitoring For the purposes of this permit, your facility is considered to
discharge to an impaired water if the first water of the United States to which you
discharge is identified by a state, tribe, or EPA pursuant to section 303(d) of the CWA as
not meeting an applicable water quality standard (i.e., without an EPA-approved or-
established TMDL, see Part 4.2.5.1 .a below), or has been removed from the 303(d) list
either because the impairments are addressed by an EPA-approved or established
TMDL or is covered by pollution control requirements that meet the requirements of 40
CFR 130.7(b)(1) (see Part 4.2.5.1.b below). For discharges that enter a separate storm
sewer system14 prior to discharge, the first water of the United States to which you
discharge is the waterbody that receives the stormwater discharge from the separate
storm sewer system.
4.2.5.1 Facilities Required to Monitor Stormwater Discharges to Impaired Waters
a. Discharges to impaired waters without an EPA-approved or established TMDL:
Monitoring is required annually in the first year of permit coverage and again in
the fourth year of permit coverage as follows, unless you detect a pollutant
causing an impairment, in which case annual monitoring must continue.
i. Year one of permit coverage: You must take your first annual sample in
your first year of permit coverage, which begins in the first full quarter
following May 30, 2021 or your date of discharge authorization, whichever
date comes later. You must monitor for all pollutants causing impairments
using a standard analytical method, provided one exists (see 40 CFR Part
136), once at each discharge point (except substantially identical
discharge points) discharging stormwater to impaired waters without an
EPA-approved or established TMDL. Note: Except where otherwise
directed by EPA, if the pollutant of concern for the impaired waterbody is
suspended solids, turbidity, or sediment/sedimentation, you must monitor
for Total Suspended Solids (TSS). If a pollutant of concern is expressed in the
form of an indicator or surrogate pollutant, you must monitor for that
indicator or surrogate pollutant. No monitoring is required when a
waterbody's biological communities are impaired but no pollutant,
including indicator or surrogate pollutants, is specified as causing the
14 Separate storm sewer systems do not include combined sewer systems or sanitary sewer systems.
Separate storm sewer systems include both municipal storm sewer systems (MS4s) and non-municipal
separate storm sewers.
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2021 MSGP Permit Parts 1-7 (as modified)
impairment, or when a waterbody's impairment is related to hydrologic
modifications, impaired hydrology, or other non-pollutant. Operators must
consult the applicable EPA Regional Office for any available guidance
regarding required monitoring parameters under this part.
1) If monitoring results indicate the monitored pollutant is not detected in
your discharge, or is within the acceptable range for a given
parameter for the waterbody to meet its designated use (e.g., pH or
temperature),15 you may discontinue monitoring for that pollutant for
the next two years. You must resume monitoring for that pollutant in
year four of permit coverage, if applicable, per Part 4.2.5.1.a.ii.
2) If monitoring results indicate that the monitored pollutant is detected
in your stormwater discharge, or is outside the acceptable range for a
given parameter (e.g., pH or temperature) for the waterbody to meet
its designated use,16 you must continue to monitor for the pollutant(s)
annually until no longer detected, after which you may discontinue
monitoring for that pollutant until monitoring resumes in year four of
permit coverage, if applicable, per Part 4.2.5.1.a.ii.
ii. Year four of permit coverage. Annual monitoring resumes in your fourth
year of permit coverage for another year for a sub-set of parameters
monitored for in the first monitoring year. In the fourth year of permit
coverage, you must monitor for all pollutants causing impairment(s) that
are associated with your industrial activity and/or are listed as a
benchmark parameter for your subsector(s) (regardless of whether you
have satisfied benchmark monitoring for the parameter per Part 4.2.2).To
determine these pollutants, start with the list of pollutants for which the
receiving waterbody is impaired and for which a standard analytical
method exists (see 40 CFR Part 136), then compare that list to the industrial
pollutants you identified in Part 6.2.3.2 and any sector-specific benchmark
monitoring pollutants in Part 8 and, if applicable, Part 9.You must monitor
for pollutants that appear on both the impairments list and either your
industrial pollutants and/or your benchmark parameter list, including
"indicator" or "surrogate" pollutants (as described in the "note" in 1
above). You must monitor once at each discharge point (except
substantially identical discharge points (SIDPs)) for these pollutants.
Consistent with Part 4.2, annual samples may be used to also satisfy any
single remaining quarterly benchmark monitoring requirement applicable
to your discharge.
1) If monitoring results indicate the monitored pollutant is not detected in
your discharge, or is within the acceptable range for a given
parameter for the waterbody to meet its designated use (e.g., pH or
temperature),17 you may discontinue monitoring for that pollutant for
the remainder of your permit coverage.
2) If the monitoring results indicate that the monitored pollutant is
detected in your discharge, or is outside the acceptable range for a
given parameter (e.g., pH or temperature) for the waterbody to meet
its designated use, you must continue to monitor for the pollutant(s)
5 Refer to your state's Water Quality Standards or contact the EPA Regional Office for assistance.
16 Ibid.
7 Ibid.
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2021 MSGP Permit Parts 1-7 (as modified)
annually until no longer detected, after which you may discontinue
monitoring for that pollutant for the remainder of your permit
coverage.
iii. Exception: If sampling results in either Part 4.2.5.1.a.i or Part 4.2.5.1.a.ii
above indicate the monitored pollutant is detected in your discharge, but
you have determined that its presence is caused solely by natural
background sources, you may discontinue monitoring for that pollutant for
the duration of your permit coverage.
To support a determination that the pollutant's presence is caused solely
by natural background sources, you must document and maintain with
your SWPPP, as required by Part 6.5:
1) An explanation of why you believe that the presence of the pollutant
of concern in your discharge is not related to the activities or materials
at your facility;and
2) Data and/or studies that tie the presence of the pollutant of concern
in your discharge to natural background sources in the watershed.
Natural background pollutants include those that occur naturally as a
result of native soils, and vegetation, wildlife, or ground water. Natural
background pollutants do not include legacy pollutants from earlier
activity on your site, or pollutants in run-on from neighboring sources that
are not naturally occurring. However, you may be eligible to discontinue
annual monitoring for pollutants that occur solely from these sources and
should consult the applicable EPA Regional Office for related guidance.
b. Discharges to impaired waters with an EPA-approved or established TMDL: For
stormwater discharges to waters for which there is an EPA-approved or
established TMDL, you are not required to monitor for the pollutant(s) for which
the TMDL was written unless EPA informs you, upon examination of the
applicable TMDL and its wasteload allocation, that you are subject to such a
requirement consistent with the assumptions and findings of the applicable
TMDL and its wasteload allocation. EPA's notice will include specifications on
stormwater discharge monitoring parameters and frequency. If there are
questions, you may consult the applicable EPA Regional Office for guidance
regarding required monitoring under this Part.
4.2.5.2 Exception for Inactive and Unstaffed Facilities.The requirement for impaired waters
monitoring does not apply at a facility that is inactive and unstaffed, as long as there
are no industrial materials or activities exposed to stormwater. To invoke this exception,
you must do the following:
a. Maintain a statement with your SWPPP stating that the site is inactive and
unstaffed, and that there are no industrial materials or activities exposed to
stormwater in accordance with the substantive requirements in 40 CFR 122.26(g)
and sign and certify the statement in accordance with Appendix B, Subsection
11.
b. If circumstances change and industrial materials or activities become exposed to
stormwater or your facility becomes active and/or staffed, this exception no
longer applies and you must immediately begin complying with the applicable
impaired waters monitoring requirements under Part 4.2.5 as if you were in your
first year of permit coverage. You must indicate in a "Change NOI" form per Part
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2021 MSGP Permit Parts 1-7 (as modified)
7.2 that your facility has materials or activities exposed to stormwater or has
become active and/or staffed.
C. If you are not qualified for this exception at the time you are authorized under this
permit, but during the permit term you become qualified because your facility is
inactive and unstaffed, and there are no industrial materials or activities that are
exposed to stormwater, then you must notify EPA of this change on your NOI
form. You may discontinue impaired waters monitoring once you have notified
EPA, and prepared and signed the certification statement described above
concerning your facility's qualification for this special exception.
Note: This exception has different requirements for Sectors G, H, and J (see Part 8).
4.2.6 Additional Monitoring Required by EPA. EPA may notify you of additional stormwater
discharge monitoring requirements that EPA determines are necessary to meet the
permit's effluent limitations. Any such notice will briefly state the reasons for the
monitoring, locations, and parameters to be monitored, frequency and period of
monitoring, sample types, and reporting requirements.
5. Corrective Actions and Additional Implementation Measures (AIM)
5.1 Corrective Action
5.1.1 Conditions Requiring SWPPP Review and Revision to Ensure Effluent Limits are Met. When
any of the following conditions occur or are detected during an inspection, monitoring
or other means, or EPA or the operator of the MS4 through which you discharge informs
you that any of the following conditions have occurred, you must review and revise, as
appropriate, your SWPPP (e.g., sources of pollution; spill and leak procedures; non-
stormwater discharges; the selection, design, installation and implementation of your
stormwater control measures) so that this permit's effluent limits are met and pollutant
discharges are minimized:
5.1.1.1 An unauthorized release or discharge (e.g., spill, leak, or discharge of non-stormwater
not authorized by this or another NPDES permit to a water of the United States) occurs
at your facility.
5.1.1.2 A discharge violates a numeric effluent limit listed in Table 2-1 and/or in your Part 8
sector-specific requirements.
5.1.1.3 Your stormwater control measures are not stringent enough for your stormwater
discharge to be controlled as necessary such that the receiving water of the United
States will meet applicable water quality standards or to meet the non-numeric
effluent limits in this permit.
5.1.1.4 A required control measure was never installed, was installed incorrectly, ornot in
accordance with Parts 2 and/or 8, or is not being properly operated or maintained.
5.1.1.5 Whenever a visual assessment shows evidence of stormwater pollution (e.g., color,
odor, floating solids, settled solids, suspended solids, foam).
5.1.2 Conditions Requiring SWPPP Review to Determine if Modifications Are Necessary. If
construction or a change in design, operation, or maintenance at your facility occurs
that significantly changes the nature of pollutants discharged via stormwater from your
facility, or significantly increases the quantity of pollutants discharged, you must review
your SWPPP (e.g., sources of pollution, spill and leak procedures, non-stormwater
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2021 MSGP Permit Parts 1-7 (as modified)
discharges, selection, design, installation and implementation of your stormwater
control measures) to determine if modifications are necessary to meet the effluent
limits in this permit.
5.1.3 Deadlines for Corrective Actions
5.1.3.1 Immediate Actions. You must immediately take all reasonable steps to minimize or
prevent the discharge of pollutants until you can implement a permanent solution,
including cleaning up any contaminated surfaces so that the material will not
discharge in subsequent storm events. In Part 5, the term "immediately" means that the
day you find a condition requiring corrective action, you must take all reasonable steps
to minimize or prevent the discharge of pollutants until you can implement a
permanent solution. However, if you identify a problem too late in the work day to
initiate corrective action, you must perform the corrective action the following work
day morning. The term "all reasonable steps" means you must respond to the
conditions triggering the corrective action, such as cleaning up any exposed materials
that may be discharged in a storm event (e.g., through sweeping, vacuuming) or
making arrangements (i.e., scheduling) for a new SCM to be installed.
5.1.3.2 Subsequent Actions. If additional actions are necessary beyond those implemented
pursuant to Part 5.1.3.1, you must complete the corrective actions (e.g., install a new or
modified control and make it operational, complete the repair) before the next storm
event if possible, and within 14 calendar days from the time of discovery that the
condition in Part 5.1.1 is not met. If it is infeasible to complete the corrective action
within 14 calendar days, you must document why it is infeasible to complete the
corrective action within the 14-day timeframe. You must also identify your schedule for
completing the work, which must be done as soon as practicable after the 14-day
timeframe but no longer than 45 days after discovery. If the completion of corrective
action will exceed the 45-day timeframe, you may take the minimum additional time
necessary to complete the corrective action, provided that you notify the appropriate
EPA Regional Office of your intention to exceed 45 days, your rationale for an
extension, and a completion date, which you must also include in your corrective
action documentation (see Part 5.3). Where your corrective actions result in changes
to any of the controls or procedures documented in your SWPPP, you must modify your
SWPPP accordingly within 14 calendar days of completing corrective action work.
These time intervals are not grace periods, but are schedules considered reasonable
for documenting your findings and for making repairs and improvements. They are
included in this permit to ensure that the conditions prompting the need for these
repairs and improvements do not persist indefinitely.
5.1.4 Effect of Corrective Action. If the event triggering the review is a permit violation (e.g.,
non-compliance with an effluent limit), correcting it does not remove the original
violation. Additionally, failing to take corrective action in accordance with this section
is an additional permit violation. EPA may consider the appropriateness and
promptness of corrective action in determining enforcement responses to permit
violations.
5.1.5 Substantially Identical Discharge Points. If the event triggering corrective action is
associated with a discharge point that had been identified as a "substantially identical
discharge point" (SIDP) (see Parts 3.2.4.5 and 4.1.1), your review must assess the need
for corrective action for all related SIDPs. Any necessary changes to control measures
that affect these other discharge points must also be made before the next storm
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2021 MSGP Permit Parts 1-7 (as modified)
event if possible, or as soon as practicable following that storm event. Any corrective
actions must be conducted within the timeframes set forth in Part 5.1.3.
5.2 Additional Implementation Measures (AIM)
If any of the following AIM triggering events in Parts 5.2.3, 5.2.4, or 5.2.5 occur, you must
follow the response procedures described in those parts, called "additional
implementation measures" or "AIM." There are three AIM levels: AIM Level 1, Level 2,
and Level 3. You must respond as required to different AIM levels which prescribe
sequential and increasingly robust responses when a benchmark exceedance occurs.
You must follow the corresponding AIM level responses and deadlines described in
Parts 5.2.3, 5.2.4, and 5.2.5 unless you qualify for an exception under Part 5.2.6.
5.2.1 Baseline Status
Once you receive discharge authorization under this permit per Part 1.3, you are in a
baseline status for all applicable benchmark parameters. If an AIM triggering event
occurs and you have proceeded sequentially to AIM Level 1, 2 or 3, you may return
directly to baseline status once the corresponding AIM-level response and conditions
are met.
5.2.2 AIM Triggering Events. If an annual average exceeds an applicable benchmark
threshold based on the following events, the AIM requirements have been triggered for
that benchmark parameter. You must follow the corresponding AIM-level responses
and deadlines described in Parts 5.2.3, 5.2.4, and 5.2.5 unless you qualify for an
exception under Part 5.2.6. An annual average exceedance for a parameter can
occur if:
5.2.2.1 The four-quarterly annual average for a parameter exceeds the benchmark threshold,
or
5.2.2.2 Fewer than four quarterly samples are collected, but a single sample or the sum of any
sample results within the sampling year exceeds the benchmark threshold by more
than four times for a parameter. This result indicates an exceedance is mathematically
certain (i.e., the sum of quarterly sample results to date is already more than four times
the benchmark threshold).1$
5.2.3 AIM Level 1
Your status changes from baseline to AIM Level 1 if quarterly benchmark monitoring
results indicate that an AIM triggering event per Part 5.2.2 has occurred, unless you
qualify for an exception under Part 5.2.6.
5.2.3.1 AIM Level 1 Responses. If any of the triggering events in Part 5.2.2 occur, you must:
Review SWPPP/Stormwater Control Measures. Immediately review your SWPPP
and the selection, design, installation, and implementation of your stormwater
control measures to ensure the effectiveness of your existing measures and
18 For pH, an annual average exceedance can only occur if the four-quarter annual average exceeds the
benchmark threshold.
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2021 MSGP Permit Parts 1-7 (as modified)
determine if modifications are necessary to meet the benchmark threshold for
the applicable parameter,19 and
Implement Additional Measures. After reviewing your SWPPP/stormwater control
measures, you must implement additional measures, considering good
engineering practices, that would reasonably be expected to bring your
exceedances below the parameter's benchmark threshold; or if you determine
nothing further needs to be done with your stormwater control measures, you
must document per Part 5.3 and include in your annual report why you expect
your existing control measures to bring your exceedances below the parameter's
benchmark threshold for the next 12-month period.
5.2.3.2 AIM Level 1 Deadlines. If any modifications to or additional control measures are
necessary in response to AIM Level 1, you must implement those modifications or
control measures within 14 days of receipt of laboratory results, unless doing so within 14
days is infeasible. If doing so within 14 days is infeasible, you must document per Part
5.3 why it is infeasible and implement such modifications within 45 days.
5.2.3.3 Continue Quarterly Benchmark Monitoring. After compliance with AIM Level 1
responses and deadlines, you must continue quarterly benchmark monitoring for the
next four quarters for the parameter(s) that caused the AIM triggering event at all
affected stormwater discharge points, beginning no later than the next full quarter
after compliance.
5.2.3.4 AIM Level 1 Status Update. While in AIM Level 1 status, you may either:
a. Return to Baseline Status. Your AIM Level 1 status will return to baseline status if the
AIM Level 1 responses have been met and continued quarterly benchmark
monitoring results indicate that an AIM triggering event per Part 5.2.2 has not
occurred after four quarters of monitoring (i.e., the benchmark threshold is no
longer exceeded for the parameter(s)). You may discontinue benchmark
monitoring for that parameter until monitoring resumes in year 4 of permit coverage
per Part 4.2.2.3 or if you have fulfilled all benchmark monitoring requirements per
Part 4.2.2.3, then you may discontinue monitoring for that parameter for the
remainder of the permit.
b. Advance to AIM Level 2. Your AIM Level 1 status advances to AIM Level 2 status if
you have completed AIM Level 1 responses and the continued quarterly
benchmark monitoring results indicate that an AIM triggering event per Part 5.2.2
has occurred (i.e., the benchmark threshold continues to be exceeded for the
same parameter(s)).
5.2.4 AIM Level 2
Your status changes from AIM Level 1 to AIM Level 2 if your continued quarterly
benchmark monitoring results indicate that an AIM triggering event per Part 5.2.2 has
occurred (i.e., the benchmark threshold continues to be exceeded for the
parameter(s)), unless you qualify for an exception under Part 5.2.6.
19 Examples may include: review sources of pollution, spill and leak procedures, and/or non-stormwater
discharges;conducting a single comprehensive clean-up, making a change in subcontractor,
implementing a new control measure, and/or increasing inspections.
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2021 MSGP Permit Parts 1-7 (as modified)
5.2.4.1 AIM Level 2 Responses. If any of the events in Part 5.2.2 occur, you must review your
SWPPP and implement additional pollution prevention/good housekeeping SCMs,
considering good engineering practices, beyond what you did in your AIM Level 1
responses that would reasonably be expected to bring your exceedances below the
parameter's benchmark threshold. Refer to the MSGP sector-specific fact sheets for
recommended controls found at [https://www.epa.gov/npdes/stormwater-discharges-
industrial-activities-fact-sheets-and-guidance].
5.2.4.2 AIM Level 2 Deadlines. You must implement additional pollution prevention/good
housekeeping SCMs within 14 days of receipt of laboratory results that indicate an AIM
triggering event has occurred and document per Part 5.3 how the measures will
achieve benchmark thresholds. If it is feasible for you to implement a measure, but not
within 14 days, you may take up to 45 days to implement such measure. You must
document per Part 5.3 why it was infeasible to implement such measure in 14 days. EPA
may also grant you an extension beyond 45 days, based on an appropriate
demonstration by you, the operator.
5.2.4.3 Continue Quarterly Benchmark Monitoring. After compliance with AIM Level 2
responses and deadlines, you must continue quarterly benchmark monitoring for the
next four quarters for the parameter(s) that caused the AIM triggering event at all
affected discharge points, beginning no later than the next full quarter after
compliance.
5.2.4.4 AIM Level 2 Status Update. While in AIM Level 2 status, you may either:
a. Return to Baseline Status. Your AIM Level 2 status will return to baseline status if the
AIM Level 2 responses have been met and the continued quarterly benchmark
monitoring results indicate that an AIM triggering event per Part 5.2.2 has not
occurred after four quarters of monitoring (i.e., the benchmark threshold is no
longer exceeded for the parameter(s)). You may discontinue benchmark
monitoring for that parameter until monitoring resumes in year 4 of permit
coverage per Part 4.2.2.3, or if you have fulfilled all benchmark monitoring
requirements per Part 4.2.2.3, then you may discontinue monitoring for that
parameter for the remainder of the permit.
b. Advance to AIM Level 3. Your AIM Level 2 status advances to AIM Level 3 status if
you have completed the AIM Level 2 responses and the continued quarterly
benchmark monitoring results indicate that an AIM triggering event per Part 5.2.2
has occurred (i.e., the benchmark threshold continues to be exceeded for the
same parameter(s)).
5.2.5 AIM Level 3
Your status changes from AIM Level 2 to AIM Level 3 if your continued quarterly
benchmark monitoring results indicate that an AIM triggering event per Part 5.2.2 has
occurred (i.e., the benchmark threshold continues to be exceeded for the
parameter(s)), unless you qualify for an exception per Part 5.2.6.
5.2.5.1 AIM Level 3 Responses. if any of the triggering events in Part 5.2.2 occur, you must install
structural source controls (e.g., permanent controls such as permanent cover, berms,
and secondary containment), and/or treatment controls (e.g., sand filters,
hydrodynamic separators, oil-water separators, retention ponds, and infiltration
structures), except as provided in Part 5.2.6 (AIM Exceptions). The controls or treatment
technologies or treatment train you install should be appropriate for the pollutants that
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2021 MSGP Permit Parts 1-7 (as modified)
triggered AIM Level 3 and should be more rigorous than the pollution prevention/good
housekeeping-type stormwater control measures implemented under AIM Level 2 in
Part 5.2.4. You must select controls with pollutant removal efficiencies that are sufficient
to bring your exceedances below the benchmark threshold. You must install such
stormwater control measures for the discharge point(s) in question and for substantially
identical discharge points (SIDPs), unless you individually monitor those SIDPs and
demonstrate that AIM Level 3 requirements are not triggered at those discharge points.
5.2.5.2 AIM Level 3 Deadlines. You must identify the schedule for installing the appropriate
structural source and/or treatment stormwater control measures within 14 days and
install such measures within 60 days. If is not feasible within 60 days, you may take up to
90 days to install such measures, documenting in your SWPPP per Part 5.3 why it is
infeasible to install the measure within 60 days. EPA may also grant you an extension
beyond 90 days, based on an appropriate demonstration by you, the operator.
5.2.5.3 Continue Quarterly Benchmark Monitoring. After compliance with AIM Level 3
responses and deadlines, you must continue quarterly benchmark monitoring for the
next four quarters for the parameter(s) that caused the AIM triggering event at all
affected discharge points, beginning no later than the next full quarter after
compliance.
5.2.5.4 AIM Level 3 Status Update. While in AIM Level 3 status, you may either:
a. Return to Baseline Status. Your AIM Level 3 status will return to baseline status if the
AIM Level 3 response(s) have been met and the continued quarterly benchmark
monitoring results indicate that an AIM triggering event per Part 5.2.2 has not
occurred after four quarters of monitoring (i.e., the benchmark threshold is no
longer exceeded for the parameter(s)). You may discontinue benchmark
monitoring for that parameter until monitoring resumes in what would be year 4 of
permit coverage per Part 4.2.2.3, or if you have fulfilled all benchmark monitoring
requirements per Part 4.2.2.3, then you may discontinue monitoring for that
parameter for the remainder of the permit.
b. Continue in AIM Level 3. Your AIM Level 3 status will remain at Level 3 if you have
completed the AIM Level 3 responses and the continued quarterly benchmark
monitoring results indicate that an AIM triggering event per Part 5.2.2 has occurred
(i.e., the benchmark threshold continues to be exceeded for the same
parameter(s)). You must continue quarterly benchmark monitoring for the next four
quarters for the parameter(s) that caused the AIM triggering event at all affected
discharge points, beginning no later than the next full quarter after compliance. If
you continue to exceed the benchmark threshold for the same parameter even
after compliance with AIM Level 3, EPA may require you to apply for an individual
permit.
5.2.6 AIM Exceptions
Following the occurrence of an AIM triggering event per Part 5.2.2, at any point or tier
level of AIM and following four quarters of benchmark monitoring (or sooner if the
exceedance is triggered by less than four quarters of data), you may qualify for an
exception below from AIM requirements and continued benchmark monitoring.
Regardless if you qualify for and claim an exception, you must still review your SCMs,
SWPPP, and other on-site activities to determine if actions or modifications are
necessary or appropriate in light of your benchmark exceedance(s). If claiming an AIM
exception, you must follow the requirements to demonstrate that you qualify for the
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2021 MSGP Permit Parts 1-7 (as modified)
exception as provided below. If you qualify for an exception, you are not required to
comply with the AIM responses or the continuation of quarterly benchmark monitoring
for any parameters for which you can demonstrate that the benchmark exceedance
is:
5.2.6.1 Solely Attributable to Natural Background Pollutant Levels: You must demonstrate that
the benchmark exceedance is solely attributable to the presence of that pollutant in
natural background sources, provided that all the following conditions are met and
you submit your analysis and documentation to the applicable EPA Regional Office
upon request:
a. The four-quarter average concentration of your benchmark monitoring results (or
fewer than four-quarters of data that trigger an exceedance) is less than or equal
to the concentration of that pollutant in the natural background; and
b. You document and maintain with your SWPPP, as required in Part 6.5.9, your
supporting rationale for concluding that benchmark exceedances are in fact
attributable solely to natural background pollutant levels. You must include in
your supporting rationale any data previously collected by you or others
(including literature studies) that describe the levels of natural background
pollutants in your stormwater discharge. Natural background pollutants are those
substances that are naturally occurring in soils or ground water. Natural
background pollutants do not include legacy pollutants from earlier activity on
your site, or pollutants in run-on from neighboring sources which are not naturally
occurring, such as other industrial facilities or roadways.
5.2.6.2 Due to Run-On: You must demonstrate and obtain EPA agreement that run-on from a
neighboring source (e.g., a source external to your facility) is the cause of the
exceedance, provided that all the following conditions are met and you submit your
analysis and documentation to the applicable EPA Regional Office for concurrence:
a. After reviewing and revising your SWPPP, as appropriate, you should notify the
other facility or entity contributing run-on to your discharges and request that
they abate their pollutant contribution.
b. If the other facility or entity fails to take action to address their discharges or
sources of pollutants, you should contact your applicable EPA Regional Office.
5.2.6.3 Due to an abnormal event: You must immediately document per Part 5.3 that the AIM
triggering event was abnormal, a description explaining what caused the abnormal
event, and how any measures taken within 14 days of such event will prevent a
reoccurrence of the exceedance. You must also collect a sample during the next
measurable storm event to demonstrate that the result is less than the benchmark
threshold, in which case you do not trigger any AIM requirements based on the
abnormal event. You must report the result of this sample in NeT-DMR in lieu of the result
from the sample that caused the AIM triggering event. You may avail yourself of the
"abnormal"demonstration opportunity at any AIM Level, one time per parameter, and
one time per discharge point, which shall include substantially identical discharge points
(SIDP), provided you qualify for the exception.
5.2.6.4 For Aluminum and Copper benchmark parameters only: Demonstrated to not result in
an exceedance of your facility-specific value using the national recommended water
quality criteria in-lieu of the applicable MSGP benchmark threshold:
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2021 MSGP Permit Parts 1-7 (as modified)
To be eligible for the exception, you must demonstrate to EPA that your stormwater
discharge(s) that exceeded the applicable nationally representative MSGP
benchmark threshold would not result in an exceedance of a derived facility-specific
value. The demonstration to EPA, which will be made publicly available, must meet the
minimum elements below in order to be considered for and approved by the
applicable EPA Regional Office. If you exceed the MSGP benchmark threshold for
aluminum or copper, you must still comply with any applicable AIM requirements and
additional benchmark monitoring until the demonstration is made to and approved by
the applicable EPA Regional Office. In this case, EPA suggests that samples collected
for any continued benchmark monitoring also be analyzed for the required input
parameters for each model for efficiency. If you are an existing operator and you
anticipate an exceedance of the MSGP benchmark(s) based on previous monitoring
data and expect to utilize this exception(s), EPA recommends you begin the required
data collection in your first year of permit coverage.
a. Aluminum (only for discharges to freshwater):
i. Conditions for this exception are:
1) Use of EPA's 2018 National Recommended Aluminum Aquatic Life Criteria:
httl2s://www.el2a.gov/wqc/aquatic-life-criteria-aluminum;
2) In-stream waterbody sampling for the three water quality input
parameters for the recommended criteria model: pH, total hardness, and
dissolved organic carbon (DOC); and
3) Completion of sampling events sufficient to capture spatial and temporal
variability. Sampling events must adequately represent each applicable
season at the facility's location, which would likely be over the course of
at least one year. An equal number of ambient waterbody samples must
be collected at a single upstream and downstream location from the
operator's discharge point(s) to the receiving water of the United States.
Where there exists no ambient source water upstream of the operator's
discharge point(s) to the receiving water of the United States, samples of
the ambient downstream waterbody conditions are sufficient.
H. The demonstration provided to EPA must include, at minimum:
1) A description of the sampling, analysis, and quality assurance procedures
that were followed for data collection, following the guidance in Section
3 of EPA's Industrial Stormwater Monitoring and Sampling Guide.
httl2s://www.el2a.gov/sites/12roduction/files/2015-
11/documents/msgp monitoring auide.pdf;
2) The input parameters and export of results from the Aluminum Criteria
Calculator, available at: httl2s://www.el2a.gov/sites/production/files/2018-
12/aluminum-criteria-calculator-v20.xlsm; and,
3) A narrative summary of results.
b. Copper(only for discharges to freshwater):
i. Conditions for this exception are:
1) Use of EPA's 2007 National Recommended Freshwater Copper Aquatic
Life Criteria: httl2s://www.el2a.gov/wqc/aquatic-life-criteria-col2per;
2) In-stream waterbody sampling for the 10 water quality input parameters
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to the BLM for copper: pH; dissolved organic carbon (DOC); alkalinity;
temperature; major cations (calcium, magnesium, sodium, and
potassium); and major anions (sulfate, chloride);
3) The water quality input parameters, with the exception of temperature,
must fall within the range of conditions recommended for use in the BLM,
found in Table 1-1 of the Data Requirements document:
httl2s://www.el2a.gov/sites/12roduction/files/2015-1 1/documents/col2per-
data-requirements-trainingpdf; and
4) Completion of sampling events sufficient to capture spatial and temporal
variability. Because some of the BLM input parameters are known to vary
seasonally, EPA suggests a possible starting point of at least one sampling
event per season.20 Sampling events must adequately represent each
applicable season at the facility's location, which would likely be over the
course of at least one year. An equal number of ambient waterbody
samples must be collected at a single upstream and downstream
location from the operator's discharge point(s) to the receiving water of
the United States. Where there exists no ambient source water upstream
of the operator's discharge point(s) to the receiving water of the United
States, samples of the ambient downstream waterbody conditions are
sufficient.
ii. The demonstration provided to EPA must include, at minimum:
1) A description of the sampling, analysis, and quality assurance procedures
that were followed for data collection, following the guidance in Section
3 of EPA's Industrial Stormwater Monitoring and Sampling Guide.
httl2s://www.el2a.gov/sites/12roduction/files/2015-
11/documents/msgp monitoring quide.pdf;
2) A discussion of how the data collected reflects the site-specific
characteristics and how the operator considered special circumstances
that may affect copper toxicity throughout the expected range of
receiving water conditions;
3) The input file and export of the results from the BLM software, which can
be requested at: httl2s://www.el2a.gov/wgs-tech/col2per-biotic-liaand-
model; and
4) A narrative summary of results.
5.2.6.5 Demonstrated to not result in any exceedance of water quality standards: You must
demonstrate to EPA within 30 days of the AIM triggering event that the triggering event
does not result in any exceedance of water quality standards. If it is not feasible to
complete this demonstration within 30 days, you may take up to 90 days, documenting
20 EPA training materials on Copper BLM for Data Requirements states that spatial variability in the BLM input
parameters caused by physical factors such as watershed size or the presence or absence of a point
source discharge(s) to a waterbody should also be considered when determining how many sampling
events should be collected when using the BLM to develop site-specific copper criteria.Spatial variability in
the BLM input parameters should also be considered when determining how many sampling locations
should be selected for development of site-specific copper criteria using the BLM. Regardless of the
number of sampling events involved, data collection should reflect site-specific characteristics and
consider special circumstances that may affect copper toxicity throughout the expected range of
receiving water conditions.See httr)s://www.er)a.gov/sites/production/files/2015-1 1/documents/copper-
data-requirements-training pdf.
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2021 MSGP Permit Parts 1-7 (as modified)
in your SWPPP why it is infeasible to complete the demonstration within 30 days. EPA
may also grant you an extension beyond 90 days, based on an appropriate
demonstration by you, the operator. The demonstration to EPA, which will be made
publicly available, must include the following minimum elements in order to be
considered for approval by the EPA Regional Office:
a. the water quality standards applicable to the receiving water;
b. the average flow rate of the stormwater discharge;
C. the average instream flow rates of the receiving water immediately upstream
and downstream of the discharge point;
d. the ambient concentration of the parameter(s) of concern in the receiving water
immediately upstream and downstream of the discharge point demonstrated by
full-storm composite sampling;
e. the concentration of the parameter(s) of concern in the stormwater discharge
demonstrated by full-storm, flow-weighted composite sampling;
f. any relevant dilution factors applicable to the discharge; and
g. the hardness of the receiving water.
Timeframe of EPA Review of Your Submitted Demonstration: EPA will review and either
approve or disapprove of such demonstration within 90 days of receipt (EPA may take
up to 180 days upon notice to you before the 90th day that EPA needs additional time).
• EPA Approval of Your Submitted Demonstration. If EPA approves such demonstration
within this timeframe, you have met the requirements for this exception, and you do
not have to comply with the corresponding AIM requirements and continued
benchmark monitoring.
• EPA Disapproval of Your Submitted Demonstration. If EPA disapproves such
demonstration within this timeframe, you must comply with the corresponding AIM
requirements and continued benchmark monitoring, as required. Compliance with
the AIM requirements would begin from the date EPA notifies you of the disapproval
unless you submit a Notice of Dispute to the applicable EPA Regional Office in Part 7
within 30 days of EPA's disapproval.
• EPA Does Not Provide Response Related to Your Submitted Demonstration. If EPA
does not provide a response on the demonstration within this timeframe, you may
submit to the EPA Regional Office in Part 7 a Notice of Dispute.
• Operator Submittal of Notice of Dispute. You may submit all relevant materials,
including support for your demonstration and all notices and responses to the Water
Division Director for the applicable EPA Region to review within 30 days of EPA's
disapproval or after 90 days (or 180 days if EPA has provided notice that it needs
more time) of not receiving a response from EPA.
• EPA Review of Notice of Dispute. EPA will send you a response within 30 days of
receipt of the Notice of Dispute. Time for action by you, the operator, upon
disapproval shall be tolled during the period from filing of the Notice of Dispute until
the decision on the Notice of Dispute is issued by the Water Division Director for the
applicable EPA Region.
5.3 Corrective Action and AIM Documentation
5.3.1 Documentation within 24 Hours. You must document the existence of any of the
conditions listed in Parts 5.1.1, 5.2.3, 5.2.4, or 5.2.5 within 24 hours of becoming aware of
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2021 MSGP Permit Parts 1-7 (as modified)
such condition. You are not required to submit this documentation to EPA, unless
specifically required or requested to do so. However, you must summarize your findings
in the annual report per Part 7.4. Include the following information in your
documentation:
5.3.2 Description of the condition or event triggering the need for corrective action review
and/or AIM response. For any spills or leaks, include the following information: a
description ofthe incident including material, date/time, amount, location, and reason
for spill, and any leaks, spills or other releases that resulted in discharges of pollutants to
waters of United States, through stormwater or otherwise;
5.3.2.1 Date the condition/triggering event was identified;
5.3.2.2 Description of immediate actions taken pursuant to Part 5.1.3.1 to minimize or prevent
the discharge of pollutants. For any spills or leaks, include response actions, the
date/time clean-up completed, notifications made, and staff involved. Also include
any measures taken to prevent the reoccurrence of such releases (see Part 2.1.2.4);
and
5.3.2.3 A statement, signed and certified in accordance with Appendix B,Subsection 11.
5.3.3 Documentation within 14 Days. You must also document the corrective actions and/or
AIM responses you took or will take as a result of the conditions listed in Parts 5.1.1, 5.2.3,
5.2.4, and/or 5.2.5 within 14 days from the time of discovery of any of those
conditions/triggering events. Provide the dates when you initiated and completed (or
expect to complete) each corrective action and/or AIM response. If infeasible to
complete the necessary corrective actions and/or AIM responses within the specified
timeframe, per Parts 5.1.1, 5.2.3, 5.2.4, or 5.2.5, you must document your rationale and
schedule for installing the controls and making them operational as soon as
practicable after the specified timeframe. If you notified EPA regarding an allowed
extension of the specified timeframe, you must document your rationale for an
extension. Include any additional information and/or rationale that is required and/or
applicable to the specified corrective action and/or AIM response in Part 5.You are
not required to submit this documentation to EPA, unless specifically required or
requested to do so. However, you must summarize your corrective actions and/or AIM
responses in the Annual Report per Part 7.4.
6. Stormwater Pollution Prevention Plan (SWPPP)
You must prepare a SWPPP for your facility before submitting your NOI for permit
coverage. If you prepared a SWPPP for coverage under a previous version of this
permit, you must review and update the SWPPP to implement all provisions of this
permit prior to submitting your NOI. The SWPPP does not contain effluent limitations;
such limitations are contained in Parts 2, 8, and 9 of the permit. The SWPPP is intended
to document the selection, design, and installation of stormwater control measures to
meet the permit's effluent limits. The SWPPP is a living document. Facilities must keep
their SWPPP up-to-date throughout their permit coverage, such as making revisions and
improvements to their stormwater management program based on new information
and experiences with major storm events. As distinct from the SWPPP, the additional
documentation requirements (see Part 6.5) are so that you document the
implementation (including inspection, maintenance, monitoring, and corrective
action) of the permit requirements.
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2021 MSGP Permit Parts 1-7 (as modified)
Note: Any discharges not expressly authorized in this permit cannot become authorized
or shielded from liability under CWA section 402(k) by disclosure to EPA, state, or local
authorities after issuance of this permit via any means, including the Notice of Intent
(NOI) to be covered by the permit, the SWPPP, during an inspection, etc.
6.1 Person(s) Responsible for Preparing the SWPPP
You shall prepare the SWPPP in accordance with good engineering practices and to
industry standards. The SWPPP may be developed by either a person on your staff or a
third party you hire, but it must be developed by a "qualified person" and must be
certified per the signature requirements in Part 6.2.7. If EPA concludes that the SWPPP is
not in compliance with Part 6.2 of this permit, EPA may require the SWPPP to be
reviewed, amended as necessary, and certified by a Professional Engineer, or for
Sector G, H or J, by a Professional Geologist, with the education and experience
necessary to prepare an adequate SWPPP.
Note: A "qualified person," as defined in Appendix A, is a person knowledgeable in the
principles and practices of industrial stormwater controls and pollution prevention, and
possesses the education and ability to assess conditions at the industrial facility that
could impact stormwater quality, and the education and ability to assess the
effectiveness of stormwater controls selected and installed to meet the requirements of
the permit.
6.2 Required Contents of Your SWPPP
To be covered under this permit, your SWPPP must contain all of the following elements:
• Stormwater pollution prevention team (Part 6.2.1);
• Site description (Part 6.2.2);
• Summary of potential pollutant sources (Part 6.2.3);
• Description of stormwater control measures (Part 6.2.4);
• Schedules and procedures (Part 6.2.5);
• Documentation to support eligibility pertaining to other federal laws (Part 6.2.6); and
• Signature requirements (Part 6.2.7).
Where your SWPPP refers to procedures in other facility documents, such as a Spill
Prevention, Control and Countermeasure (SPCC) Plan or an Environmental
Management System (EMS), copies of the relevant portions of those documents must
be kept with your SWPPP.
6.2.1 Stormwater Pollution Prevention Team. You must identify the staff members (by name or
title) that comprise the facility's stormwater pollution prevention team as well as their
individual responsibilities. Your stormwater pollution prevention team is responsible for
overseeing development of the SWPPP, any modifications to it, and for implementing
and maintaining control measures and taking corrective actions and/or AIM responses,
when required. Each member of the stormwater pollution prevention team must have
ready access to either an electronic or paper copy of applicable portions of this
permit, the most updated copy of your SWPPP, and other relevant documents or
information that must be kept with the SWPPP.
6.2.2 Site Description. Your SWPPP must include the following:
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2021 MSGP Permit Parts 1-7 (as modified)
6.2.2.1 Activities at the facility. Provide a description of the nature of the industrial activities at
your facility.
6.2.2.2 General location map. Provide a general location map (e.g., U.S. Geological Survey
(USGS) quadrangle map) with enough detail to identify the location of your facility and
all receiving waters for your stormwaterdischarges.
6.2.2.3 Site map. Provide a map showing:
a. Boundaries of the property and the size of the property in acres;
b. Location and extent of significant structures and impervious surfaces;
C. Directions of stormwater flow (use arrows), including flows with a significant
potential to cause soil erosion;
d. Locations of all stormwater control measures;
e. Locations of all receiving waters, including wetlands, in the immediate vicinity of
your facility. Indicate which waterbodies are listed as impaired and which are
identified by your state, tribe, or EPA as Tier 2, Tier 2.5, or Tier 3 waters;
f. Locations of all stormwater conveyances including ditches, pipes, and swales;
g. Locations of potential pollutant sources identified under Part 6.2.3.2;
h. Locations where significant spills or leaks identified under Part 6.2.3.3 have
occurred;
i. Locations of all stormwater monitoring points;
j. Locations of stormwater inlets and discharge points, with a unique identification
code for each discharge point (e.g., 001, 002), indicating if you are treating one
or more discharge points as "substantially identical" under Parts 3.2.4.5, 6.2.5.3,
and 4.1.1, and an approximate outline of the areas draining to each discharge
point;
k. If applicable, municipal separate storm sewer systems (MS4s) and where your
stormwater discharges to them;
I. Areas of Endangered Species Act-designated critical habitat for endangered or
threatened species, if applicable.
M. Locations of the following activities where such activities are exposed to
precipitation:
1. fueling stations;
ii. vehicle and equipment maintenance and/or cleaning areas;
iii. loading/unloading areas;
iv. locations used for the treatment, storage, or disposal of wastes;
v. liquid storage tanks;
vi. processing and storage areas;
vii. immediate access roads and rail lines used or traveled by carriers of raw
materials, manufactured products, waste material, or by-products used or
created by the facility;
viii.transfer areas for substances in bulk;
ix. machinery;
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x. locations and sources of run-on to your site from adjacent property that
contains significant quantities of pollutants.
6.2.3 Summary of Potential Pollutant Sources. You must describe in the SWPPP areas at your
facility where industrial materials or activities are exposed to stormwater or from which
authorized non-stormwater discharges originate. Industrial materials or activities include
but are not limited to: material handling equipment or activities; industrial machinery;
raw materials; industrial production and processes; and intermediate products, by-
products, final products, and waste products. Material handling activities include, but
are not limited to: the storage, loading and unloading, transportation, disposal, or
conveyance of any raw material, intermediate product, final product or waste
product. For structures located in areas of industrial activity, you must be aware that
the structures themselves are potential sources of pollutants. This could occur, for
example, when metals such as aluminum or copper are leached from the structures as
a result of acid rain.
For each area identified,the description must include:
6.2.3.1 Activities in the Area. A list of the industrial activities exposed to stormwater (e.g.,
material storage; equipment fueling, maintenance, and cleaning; cutting steel
beams).
6.2.3.2 Pollutants. A list of the pollutant(s) or pollutant constituents (e.g., crankcase oil,zinc,
sulfuric acid, cleaning solvents) associated with each identified activity, which could
be exposed to rainfall or snowmelt and could be discharged from your facility.The
pollutant list must include all significant materials that have been handled, treated,
stored or disposed, and that have been exposed to stormwater in the three years prior
to the date you prepare or amend yourSWPPP.
6.2.3.3 Spills and Leaks. You must document where potential spills and leaks could occur that
could contribute pollutants to stormwater discharges, and the corresponding
discharge point(s) that would be affected by such spills and leaks. You must document
all significant spills and leaks of oil or toxic or hazardous substances that actually
occurred at exposed areas, or that drained to a stormwater conveyance, in the three
years prior to the date you prepare or amend yourSWPPP.
Note: Significant spills and leaks include, but are not limited to, releases of oil or
hazardous substances in excess of quantities that are reportable under CWA section
311 (see 40 CFR 110.6 and 40 CFR 1 17.21) or section 102 of the Comprehensive
Environmental Response, Compensation and Liability Act (CERCLA), 42 USC§ 9602. This
permit does not relieve you of the reporting requirements of 40 CFR 110, 40 CFR 117,
and 40 CFR 302 relating to spills or other releases of oils or hazardous substances.
6.2.3.4 Unauthorized Non-Stormwater Discharges Evaluation. By the end of the first year of your
permit coverage under this permit, you must inspect and document all discharge
points at your facility as part of the SWPPP. If it is infeasible to complete the evaluation
within the first year of permit coverage, you must document in your SWPPP why this is
the case and identify the schedule by which you expect to complete the evaluation.
Documentation of your evaluation must include:
a. The date of the evaluation;
b. A description of the evaluation criteria used;
C. A list of the discharge points or onsite drainage points that were directly
observed during the evaluation; and
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d. If there are any unauthorized non-stormwater discharges (see Part 1.2.2 for the
exclusive list of authorized non-stormwater discharges under this permit) you
must immediately take action(s), such as implementing control measures, to
eliminate those discharges or seek an individual NPDES wastewater permit and
document that you obtained the permit (for example, a floor drain was sealed,
a sink drain was re-routed to sanitary, or an NPDES permit application was
submitted for an unauthorized cooling water discharge).
e. An explanation of everything you did to immediately eliminate the
unauthorized discharge per Part 5 Corrective Actions.
6.2.3.5 Salt Storage. You must document the location of any storage piles containing salt used
for deicing or other commercial or industrial purposes.
6.2.3.6 Sampling Data. Existing permitted facilities must summarize all stormwater discharge
sampling data collected at the facility during the previous permit term.The summary
shall include a narrative description (and may include data tables/figures) that
adequately summarizes the collected sampling data tosupport identification of
potential pollution sources at your facility. New dischargers and new sources must
provide a summary of any available stormwater data they may have.
6.2.4 Description of Stormwater Control Measures to Meet Technology-Based and Water
Quality-Based Effluent Limits. You must document the location and type of stormwater
control measures you have specifically chosen and/or designed to comply with:
6.2.4.1 Part 2.1.2: Non-numeric technology-based effluent limits;
6.2.4.2 Parts 2.1.3 and 8: Applicable numeric effluent limitations guidelines-based limits;
6.2.4.3 Part 2.2: Water quality-based effluent limits;
6.2.4.4 Part 2.3: Any additional measures that formed the basis of eligibility regarding
Endangered Species Act-listed threatened and endangered species or their critical
habitat, National Historic Preservation Act historic properties, and/orfederal CERCLA
Site requirements;
6.2.4.5 Parts 8 and 9: Applicable effluent limits;
6.2.4.6 Regarding your control measures, you must also document, asappropriate:
a. How you addressed the selection and design considerations in Part2.1.1;
b. How they address the pollutant sources identified in Part6.2.3.
Effluent limit requirements in Part 2.1.2 that do not involve the site-specific selection of
a stormwater control measure or are specific activity requirements (e.g., "cleaning
catch basins when the depth of debris reaches two-thirds (2/3) of the sump depth, or
in line with manufacturer specifications, whichever is lower, and keeping the debris
surface at least six inches below the lowest outlet pipe") are marked with an asterisk
(*). For the requirements marked with an asterisk, you may include extra information,
or you may just "copy-and-paste" these effluent limits word-for-word into your SWPPP
without providing additional documentation.
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6.2.5 Schedules and Procedures
6.2.5.1 Pertaining to Stormwater Control Measures Used to Comply with the Effluent Limits in
Part 2. You must document the following in yourSWPPP:
a. Good Housekeeping (see Part 2.1.2.2)-A schedule or the convention used for
determining when pickup and disposal of waste materials occurs. Also provide
a schedule for routine inspections for leaks and conditions of drums, tanks and
containers.
b. Maintenance (see Part 2.1.2.3)-Preventative maintenance procedures,
including regular inspections, testing, maintenance and repair of all stormwater
control measures to avoid situations that may result in leaks, spills, and other
releases, and any back-up practices in place should a storm event resulting in a
stormwater discharge occur while a control measure is off-line. The SWPPP shall
include the schedule or frequency for maintaining all control measures used to
comply with the effluent limits in Part 2;
C. Spill Prevention and Response Procedures (see Part 2.1.2.4) -Procedures for
preventing and responding to spills and leaks, including notification procedures.
For preventing spills, include in your SWPPP the stormwater control measures for
material handling and storage, and the procedures for preventing spills that
can contaminate stormwater. Also specify cleanup equipment, procedures
and spill logs, as appropriate, in the event of spills. You may reference the
existence of other plans for Spill Prevention, Control and Countermeasure
(SPCC) developed for the facility under section 311 of the CWA or BMP
programs otherwise required by an NPDES permit for the facility, provided that
you keep a copy of that other plan onsite and make it available for review
consistent with Part 6.4;
d. Erosion and Sediment Controls (see Part 2.1.2.5)- If you use polymers and/or
other chemical treatments as part of your erosion and sediment controls, you
must identify the polymers and/or chemicals used and the purpose;
e. Employee Training (see Part 2.1.2.8) -The elements of your employee training
plan shall include all, but not necessarily limited to, the requirements set forth in
Part 2.1.2.8, and also the following:
ii. The content of the training;
iii. The frequency/schedule of training for employees who work in areas where
industrial materials or activities are exposed to stormwater, or who are
responsible for implementing activities necessary to meet the conditions of
this permit;
iv. A log of the dates on which specific employees received training.
6.2.5.2 Pertaining to Inspections and Assessments. You must document in your SWPPP your
procedures for performing, as appropriate, the types of inspections specified by this
permit, including:
a. Routine facility inspections (see Part 3.1)and;
b. Quarterly visual assessment of stormwater discharges (see Part3.2).
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For each type of inspection performed,your SWPPP must identify:
a. Person(s) or positions of person(s) responsible for the inspection;
b. Schedules for conducting inspections, including tentative schedule for facilities
in climates with irregular stormwater discharges (see Part3.2.4);
c. Specific items to be covered by the inspection, including schedules for specific
discharge points.
If you are invoking the exception for inactive and unstaffed facilities relating to
routine facility inspections and quarterly visual assessments, you must include in your
SWPPP the information to support this claim as required by Parts 3.1.5 and 3.2.4.
6.2.5.3 Pertaining to Monitoring
a. Procedures for Each Type of Monitoring. You must document in your SWPPP
procedures for conducting the six types of analytical stormwater discharge
monitoring specified by this permit, where applicable to your facility,
including:
I. Indicator monitoring (Part 4.2.1);
ii. Benchmark monitoring (Part4.2.2);
iii. Effluent limitations guidelines monitoring (Part4.2.3);
iv. State- or tribal-specific monitoring (Part4.2.4);
V. Impaired waters monitoring (Part4.2.5);
vi. Other monitoring as required by EPA (Part4.2.6).
b. Documentation for Each Type of Monitoring. For each type of stormwater
discharge monitoring, you must document in your SWPPP:
I. Locations where samples are collected, including any determination that
two or more discharge points are substantially identical;
ii. Parameters for sampling and the frequency of sampling for each
parameter;
iii. Schedules for monitoring at your facility, including schedule for alternate
monitoring periods for climates with irregular stormwater discharges (see
Part 4.1.6);
iv. Any numeric control values (benchmark thresholds, effluent limitations
guidelines, TMDL-related requirements, or other requirements) applicable to
stormwater discharges from each discharge point;
V. Procedures (e.g., responsible staff, logistics, laboratory to be used) for
gathering storm event data, as specified in Part 4.1.
C. Exception for Inactive and Unstaffed Facilities. If you are invoking the exception
for inactive and unstaffed facilities for indicator monitoring, benchmark
monitoring or impaired waters monitoring, you must include in your SWPPP the
information to support this claim as required by Parts 4.2.2.5 and 4.2.5.2.
d. Exception for Substantially Identical Discharge Points(SIDP). You must document
the following in your SWPPP if you plan to use the SIDP exception for your
quarterly visual assessment requirements in Part 3.2.4 or your indicator,
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benchmark, or impaired waters monitoring requirements in Parts 4.2.1, 4.2.2, and
4.2.5, respectively (see also Part 4.1.1):
i. Location of each SIDP;
ii. Description of the general industrial activities conducted in the drainage
area of each discharge point;
iii. Description of the control measures implemented in the drainage area of
each discharge point;
iv. Description of the exposed materials located in the drainage area of each
discharge point that are likely to be significant contributors of pollutants via
stormwater discharges;
V. An estimate of the runoff coefficient of the drainage areas (low = under
40%; medium = 40 to 65%; high = above 65%);
vi. Why the discharge points are expected to discharge substantially identical
effluents.
6.2.6 Documentation to Support Eligibility Pertaining to Other Federal Laws
6.2.6.1 Documentation Regarding Endangered Species Act-Listed Threatened and
Endangered Species and Critical Habitat Protection. You must keep with your SWPPP
the documentation supporting your determination with regard to Part 1.1.4.
6.2.6.2 Documentation Regarding National Historic Preservation Act Historic Properties. You
must keep with your SWPPP the documentation supporting your determination with
regard to Part 1.1.5.
6.2.7 Signature Requirements. You must sign and date your SWPPP in accordance with
Appendix B, Subsection 11.
6.3 Required SWPPP Modifications
You must modify your SWPPP based on any corrective actions and deadlines required
under Part 5. You must sign and date any SWPPP modifications in accordance with
Appendix B, Subsection 11.
6.4 SWPPP Availability
You must retain a complete copy of your current SWPPP required by this permit at the
facility in any accessible format. A complete SWPPP includes any documents
incorporated by reference and all documentation supporting your permit eligibility
pursuant to Part 1.1 of this permit, as well as your signed and dated certification page.
Regardless of the format, the SWPPP must be immediately available to facility
employees, EPA, a state or tribe, the operator of an MS4 into which you discharge, and
representatives of the U.S. Fish and Wildlife Service (USFWS) or the National Marine
Fisheries Service (NMFS) at the time of an on-site inspection.
Your current SWPPP or certain information from your current SWPPP described below
must also be made available to the public (except any confidential business
information (CBI) or restricted information [as defined in Appendix A)), but you must
clearly identify those portions of the SWPPP that are being withheld from public access;
to do so, you must comply with one of the following two options:
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6.4.1 Making Your SWPPP Publicly Available
You have three options to comply with the public availability requirements for the
SWPPP: attaching your SWPPP to your NOI; providing a URL of your SWPPP in your NOI;
or providing SWPPP information in your NOI. To remain current for all three options, you
must update your SWPPP (by updating the attachment per Part 6.4.1.1 via a Change
NOI, updating your webpage per Part 6.4.1.2, or updating the SWPPP information in the
NOI per Part 6.4.1.3 via a Change NOI no later than 45 days after conducting the final
routine facility inspection for the year required in Part 3.1. You may switch your
preferred option throughout your permit coverage, but you must update your NOI as
necessary to indicate your change in option. You are not required to post any CBI or
restricted information (as defined in Appendix A) (such information may be redacted),
but you must clearly identify those portions of the SWPPP that are being withheld from
public access. CBI may not be withheld from those staff cleared for CBI review within
EPA, USFWS or NMFS.
6.4.1.1 Attaching Your SWPPP to your NOI: You may attach a copy of your SWPPP, and any
SWPPP modifications, records, and other reporting elements that must be kept with
your SWPPP, to your NOI in NeT-MSGP.
6.4.1.2 Providing a URL of your SWPPP in your NOI: You may provide a URL in your NOI in NeT-
MSGP where your SWPPP can be found, and maintain your current SWPPP at this URL.
You must post any SWPPP modifications, records, and other reporting elements that
must be kept with your SWPPP required for the previous year at the same URL as the
main body of the SWPPP.
6.4.1.3 Providing SWPPP Information in your NOI. You may include the following information in
your NOI in NeT-MSGP. Irrespective of this requirement, EPA may provide access to
portions of your SWPPP to a member of the public upon request (except any CBI or
restricted information (as defined in Appendix A)).
a. Onsite industrial activities exposed to stormwater, including potential spill and leak
areas (see Parts 6.2.3.1, 6.2.3.3 and 6.2.3.5);
b. Pollutants or pollutant constituents associated with each industrial activity exposed
to stormwater that could be discharged in stormwater and/or any authorized non-
stormwater discharges listed in Part 1.2.2 (see Part6.2.3.2);
c. Stormwater control measures you employ to comply with the non-numeric
technology-based effluent limits required in Parts 2.1.2 and 8, and any other
measures taken to comply with the requirements in Part 2.2 Water Quality-Based
Effluent Limitations (see Part 6.2.4). If you use polymers and/or other chemical
treatments as part of your erosion and sediment controls, you must identify the
polymers and/or chemicals used and the purpose;and
d. Schedule for good housekeeping and maintenance (see Part 6.2.5.1)and schedule
for all inspections required in Part 3 (see Part6.2.5.2).
6.5 Additional Documentation Requirements
You are required to keep the following inspection, monitoring, and certification
records with your SWPPP that together keep your records complete and up-to-
date, and demonstrate your full compliance with the conditions of this permit:
6.5.1 A copy of the NOI submitted to EPA along with any correspondence exchanged
between you and EPA specific to coverage under this permit;
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6.5.2 A copy of the authorization email you receive from the EPA assigning yourNPDES ID;
6.5.3 A copy of this permit (either a hard copy or an electronic copy easily available to
SWPPP personnel);
6.5.4 Documentation of any maintenance and repairs of stormwater control measures,
including the date(s) of regular maintenance, date(s) of discovery of areas in need of
repair/replacement, and for repairs, date(s) that the control measure(s) returned to full
function, and the justification for any extended maintenance/repair schedules (see
P art 2.1.2.3);
6.5.5 All inspection reports, including the Routine Facility Inspection Reports (see Part 3.1.6)
and Visual Assessment Documentation (see Part3.2.3);
6.5.6 Description of any deviations from the schedule for visual assessments and/or
monitoring, and the reason for the deviations (e.g., adverse weather or it was
impracticable to collect samples within the first 30 minutes of a measurable storm
event) (see Parts 3.2.4 and 4.1.5);
6.5.7 Corrective action documentation required per Part 5.1;
6.5.8 Documentation of any benchmark threshold exceedances, which AIM Level triggering
event the exceedance caused, and AIM response you employed per Part 5.2,including:
6.5.8.1 The AIM triggering event;
6.5.8.2 The AIM response taken;
6.5.8.3 Any rationale that SWPPP/SCM changes were unnecessary;
6.5.8.4 Any documentation required to meet any AIM exception per Part 5.2.6.
6.5.9 Documentation to support any determination that pollutants of concern are not
expected to be present above natural background levels if you discharge directly to
impaired waters, and that such pollutants were not detected in your discharge after
three years or were solely attributable to natural background sources (see Part 4.2.5.1);
and
6.5.10 Documentation to support your claim that your facility has changed its status from
active to inactive and unstaffed with respect to the requirements to conduct routine
facility inspections (see Part 3.1.5), quarterly visual assessments (see Part 3.2.4.4),
benchmark monitoring (see Part 4.2.2.5), and/or impaired waters monitoring (see Part
4.2.5.2).
7. Reporting and Recordkeepina
7.1 Electronic Reporting Requirement
You must submit all NOls, NOTs, NECs, Annual Reports, Discharge Monitoring Reports
(DMRs), and other reporting information as appropriate electronically, unless the EPA
Regional Office grants you a waiver based on one of the following conditions:
• If your headquarters is physically located in a geographic area (i.e., zip codeor
census tract) that is identified as under-served for broadband Internet access in the
most recent report from the Federal Communications Commission;or
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• If you have limitations regarding available computer access or computer capability.
Waivers are only granted for a one-time use for a single information submittal, e.g.,
an initial waiver for an NOI does not apply for the entire term of the permit for other
forms. If you need to submit information on paper after your first waiver, you must
apply for a new waiver.The EPA Regional Office may extend a wavier on a case-
by-case basis.
If you wish to obtain a waiver from submitting a report electronically, you must submit
a request to the applicable EPA Regional Office, found in Part 7.8. In that request you
must document which exemption you meet, provide evidence supporting any
claims, and a copy of your completed paper form. A waiver may only be considered
granted once you receive written confirmation from EPA or its authorized
representative.
7.2 Submitting Information to EPA
7.2.1 Submitting Forms via NeT-MSGP. You must submit all required information via EPA's
electronic NPDES eReporting tool (NeT), unless the permit states otherwise or unless you
have been granted a waiver per Part 7.1. You can both prepare and submit required
information in NeT-MSGP using specific forms, also found in the permit's appendices. To
access NeT-MSGP, go to httl2s://cdxnodengn.el2a.gov/net-ms-ql2/action/lo-gin.
Information you must submit to EPA via NeT-MSGP:
• Notice of Intent (NOI) (Part 1.3);
• Change Notice of Intent (NOI) (Part 1.3.4);
• No Exposure Certification (NEC) (Part 1.5);
• Notice of Termination (NOT) (Part 1.4);and
• Annual Report (AR) (Part 7.4).
Note: You must submit Discharge Monitoring Reports (see Part 7.3) electronically using
Net-DMR.
If the applicable EPA Regional Office grants you a waiver from electronic reporting,
you must use the required forms found in the Appendices.
7.2.2 Other Information Required to be Submitted. Information required to be submitted to
the applicable EPA Regional Office at the address in Part 7.8:
• New Dischargers and New Sources to Water Quality-Impaired Waters (Part 1.1.6.2);
• Exceedance Report for Numeric Effluent Limitations (Part 7.5); and
• Additional Reporting (Part 7.6)
7.3 Reporting Monitoring Data to EPA
7.3.1 Submitting Monitoring Data via NeT-DMR. You must submit all stormwater discharge
monitoring data collected pursuant to Part 4 to EPA using Net-DMR, EPA's electronic
DMR system (for more information visit: https://www.el2a.gov/compliance/npdes-
ereporting (unless the applicable EPA Regional Office grants you a waiver from
electronic reporting, in which case you may submit a paper DMR form) no later than 30
days after you have received your complete laboratory results for all monitoring
discharge points for the reporting period. Your monitoring requirements (i.e.,
parameters required to be monitored and sample frequency) will be prepopulated on
your electronic Discharge Monitoring Report (DMR) form based on the information you
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2021 MSGP Permit Parts 1-7 (as modified)
reported on your NOI form through the NeT-MSGP. Accordingly, you must certify the
following changes to your monitoring frequency to EPA by submitting a Change NOI in
NeT-MSGP, unless EPA has completed the development of planned features in the
electronic systems to process submitted monitoring results to automatically turn
monitoring on/off as applicable, which will trigger changes to your monitoring
requirements in Net-DMR:
7.3.1.1 All benchmark monitoring requirements have been fulfilled for the permitterm;
7.3.1.2 All impaired waters monitoring requirements have been fulfilled for the permit term;
7.3.1.3 Benchmark monitoring requirements no longer apply because the EPA Regional Office
has concurred with your assessment that run-on from a neighboring source is the cause
of the exceedance;
7.3.1.4 Benchmark and/or impaired monitoring requirements no longer apply because your
facility is inactive and unstaffed;
7.3.1.5 Benchmark and/or impaired monitoring requirements now apply because your facility
has changed from inactive and unstaffed to active and staffed;
7.3.1.6 For Sector G2 only: Discharges from waste rock and overburden piles have exceeded
benchmark thresholds;
7.3.1.7 A numeric effluent limitation guideline has been exceeded;
7.3.1.8 A numeric effluent limitation guideline exceedance is back in compliance.
7.3.2 When You Can Discontinue Submission of Monitoring Data. Once you have completely
fulfilled applicable monitoring requirements, you are no longer required to report
monitoring results using Net-DMR. If you have only partially fulfilled your benchmark
monitoring and/or impaired waters monitoring requirements (e.g., your four quarterly
average is below the benchmark for some, but not all, parameters; you did not detect
some, but not all, impairment pollutants), you must continue to report your results in
Net-DMR for the remaining monitoring requirements. If the EPA Regional Office grants
you a waiver per Part 7.1, you must submit paper reporting forms by the same
deadline.
7.3.3 State or Tribal Required Monitoring Data.See Part 9 for specific reporting requirements
applicable to individual states or tribes.
7.3.4 Submission Deadline for Indicator and Benchmark Monitoring Data. For both indicator
and benchmark monitoring, you are required to submit sampling results to EPA no later
than 30 days after receiving your complete laboratory results for all monitored
discharge points for each monitoring period that you are required to collect samples,
per Part 4.2.1. and Part 4.2.2. If you collect samples during multiple storm events in a
single quarter (e.g., due to adverse weather conditions, climates with irregular
stormwater discharges, or areas subject to snow), you are required to submit all
sampling results for each storm event to EPA within 30 days of receiving all laboratory
results for the event. Or, for any of your monitored discharge points that did not have a
discharge within the reporting period, using Net-DMR, you must report that no
discharges occurred for that discharge point no later than 30 days after the end of the
reporting period.
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7.4 Annual Report
You must submit an Annual Report to EPA via NeT-MSGP, per Part 7.2, by January 30th
for each year of permit coverage containing information generated from the past
calendar year. You must include the following information in the Annual Report:
7.4.1 A summary of your past year's routine facility inspection documentation required (Part
3.1.6). In addition, if you are an operator of an airport facility (Sector S) that is subject to
the airport effluent limitations guidelines and are complying with the Part 8.S.9.1
effluent limitation through the use of non-urea-containing deicers, provide a statement
certifying that you do not use pavement deicers containing urea. (Note: Operators of
airport facilities that are complying with Part 8.S.9.1 by meeting the numeric effluent
limitation for ammonia do not need to include this statement.)
7.4.2 A summary of your past year's visual assessment documentation (see Part 3.2.3);
7.4.3 A summary of your past year's corrective action and any required AIM documentation
(see Part 5.3). If you have not completed required corrective action or AIM responses
at the time you submit your annual report, you must describe the status of any
outstanding corrective actions) or AIM responses. Also describe any incidents of
noncompliance in the past year or currently ongoing, or if none, provide a statement
that you are in compliance with the permit.
Your Annual Report must also include a statement, signed and certified in accordance
with Appendix B, Subsection 11.
7.5 Numeric Effluent Limitations Exceedance Report
If follow-up monitoring per Part 4.2.3.3 exceeds a numeric effluent limit, you must
submit an Exceedance Report to EPA no later than 30 days after you have received
your laboratory results. Send the Exceedance Report to the applicable EPA Regional
Office listed in Part 7.8, and report the monitoring data through Net-DMR. Your report
must include the following:
7.5.1 NPDES ID;
7.5.2 Facility name, physical address and location;
7.5.3 Name of receiving water;
7.5.4 Monitoring data from this and the preceding monitoring event(s);
7.5.5 An explanation of the situation, including what you have done and intend to do
(should your corrective actions not yet be complete) to correct the violation;
7.5.6 An appropriate contact name and phone number.
7.6 Additional Standard Recordkeepinq and Reporting Requirements
In addition to the reporting requirements stipulated in Part 7, you are also subject to
the standard permit reporting provisions of Appendix B, Subsection 12. You must
submit the following reports to the applicable EPA Regional Office listed in Part 7.8, as
applicable. If you discharge through an MS4, you must also submit these reports to
the MS4 operator (identified pursuant to Part 6.2.2).
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7.6.1 24-hour reporting (see Appendix B, Subsection 12.F) -You must report any
noncompliance which may endanger health or the environment. Any information must
be provided orally within 24 hours from the time you become aware of the
circumstances;
7.6.2 5-day follow-up reporting to the 24-hour reporting (see Appendix B,Subsection 12.F) -A
written submission must also be provided within five days of the time you become
aware of the circumstances;
7.6.3 Reportable quantity spills (see Part 2.1.2.4) -You must provide notification, as required
under Part 2.1.2.4, as soon as you have knowledge of a leak, spill, or other release
containing a hazardous substance or oil in an amount equal to or in excess of a
reportable quantity;
7.6.4 Planned changes (see Appendix B, Subsection 12.A) -You must give notice to EPA
promptly, no fewer than 30 days prior to making any planned physical alterations or
additions to the permitted facility that qualify the facility as a new source or that could
significantly change the nature or significantly increase the quantity of pollutants
discharged;
7.6.5 Anticipated noncompliance (see Appendix B, Subsection 12.13) -You must give
advance notice to EPA of any planned changes in the permitted facility or activity
which you anticipate will result in noncompliance with permit requirements;
7.6.6 Compliance schedules (see Appendix B, Subsection 12.E) -Reports of compliance or
noncompliance with, or any progress reports on, interim and final requirements
contained in any compliance schedule of this permit must be submitted no later than
14 days following each schedule date;
7.6.7 Other noncompliance (see Appendix B, Subsection 12.G) -You must report all
instances of noncompliance not reported in your Annual Report, compliance schedule
report, or 24-hour report at the time monitoring reports are submitted; and
7.6.8 Other information (see Appendix B, Subsection 12.H) -You must promptly submit facts
or information if you become aware that you failed to submit relevant facts in your
NOI, or that you submitted incorrect information in your NOI or in any report.
7.7 Record Retention Requirements
You must retain copies of your SWPPP (including any modifications made during the
term of this permit), additional documentation requirements pursuant to Part 6.5
(including documentation related to any corrective actions or AIM responses taken
pursuant to Part 5), all reports and certifications required by this permit, monitoring
data, and records of all data used to complete the NOI to be covered by this permit,
for a period of at least three years from the date that your coverage under this
permit expires or is terminated.
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7.8 Addresses for Reports
EPA
Permit Part Region Areas Covered Address
7.8.1 1 Connecticut U.S. EPA Region 1
Massachusetts Water Division
New Hampshire Stormwater and Construction Permits
Rhode Island Section
Vermont 5 Post Office Square, Ste. 100 (06-1)
Boston, MA 02109-3912
7.8.2 2 New Jersey U.S. EPA Region 2
New York NPDES Stormwater Program
290 Broadway, 24th Floor
New York, NY 1 0007-1 866
Puerto Rico U.S. EPA Region 2
Virgin Islands Caribbean Environmental Protection
Division NPDES Stormwater Program
City View Plaza II-Suite 7000
48 Rd. 165 Km 1.2
Gua nabo, PR 00968-8069
7.8.3 3 Delaware U.S. EPA Region 3
District of Columbia NPDES Permits Section, MC 3WD41
Maryland 1650 Arch Street
Pennsylvania Philadelphia, PA 19103
Virginia
West Virginia
7.8.4 4 Alabama U.S. EPA Region 4
Florida Water Division
Georgia NPDES Stormwater Program
Kentucky Atlanta Federal Center
Mississippi 61 Forsyth Street SW
North Carolina Atlanta, GA 30303-3104
South Carolina
Tennessee
7.8.5 5 Illinois U.S. EPA Region 5
Indiana NPDES Program Branch
Michigan 77 W. Jackson Blvd. MC WP16J
Minnesota Chicago, IL 60604-3507
Ohio
Wisconsin
7.8.6 6 Arkansas U.S. EPA Region 6
Louisiana Permitting Section (WD-PE)
Oklahoma 1201 Elm Street, Suite 500
Texas Dallas, TX 75270
New Mexico (except
see Region 9 for
Navajo lands, and see
Region 8 for Ute
Mountain Reservation
lands)
7.8.7 7 Iowa U.S. EPA Region 7
Kansas NPDES Stormwater Program
Missouri 11201 Renner Blvd
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EPA
Permit Part Region Areas Covered Address
Nebraska Lenexa, KS 66219
7.8.8 8 Colorado EPA Region 8
Montana Storm Water Program
North Dakota MC: 8P-W-WW
South Dakota 1595 Wynkoop Street
Wyoming Denver, CO 80202-1 129
Utah (except see
Region 9 for Goshute
Reservation and
Navajo Reservation
lands)
The Ute Mountain
Reservation in New
Mexico
The Pine Ridge
Reservation in
Nebraska
7.8.9 9 Arizona U.S. EPA Region 9
California Water Division
Hawaii NPDES Stormwater Program (WTR-2-3)
Nevada 75 Hawthorne Street
Guam San Francisco, CA 94105-3901
American Samoa
The Commonwealth
of the Northern
Mariana Islands
The Goshute
Reservation in Utah
and Nevada
The Navajo
Reservation in Utah
New Mexico, and
Arizona
The Duck Valley
Reservation in Idaho
Fort McDermitt
Reservation in Oregon
7.8.10 10 Alaska U.S. EPA Region 10
Idaho Water Division
Oregon (except see NPDES Stormwater Program (19-004)
Region 9 for Fort 1200 6th Avenue, Suite 155
McDermitt Seattle, WA 98101-3188
Reservation)
Washington
7.8.1 1 State and Tribal Addresses See Part 9 (states and tribes) for the
addresses of applicable states or tribes
that require submission of information to
their a encies.
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