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NC Stormwater FAQ's

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Angie Campos
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Confused about stormwater compliance under the North Carolina Industrial Stormwater Permit? We’ve compiled the answers to the most common questions below.

Who must apply for coverage under this permit?

North Carolina has 20 different industrial activity general permits. In order to determine whether the industrial activities at your facility fall under any of the general permits and to determine which general permit you fall under, below is a summary table of the industrial activities covered by each permit.

General Permit #

Industrial Activities Included

NCG020000

SIC Code 14XX (Mineral Mining Industry) and like activities; Click here for more information.

NCG030000

SIC Codes 335X, 3398, 34XX, 35XX, 36XX, 37XX, 38XX; Click here for more information.

NCG050000

SIC Codes 23XX, 265X, 267X, 27XX, 30XX, 31XX, 39XX and like activities, but excludes SIC Codes 301X, 311X; Click here for more information.

NCG060000

SIC Codes 20XX, 21XX, 283X, 284X, 422X; Click here for more information.

NCG070000

SIC Codes 32XX and like activities, but excludes SIC Code 3273; Click here for more information.

NCG080000

SIC Codes 40XX, 41XX, 42XX, 43XX, 5171, and additional specified activities, but excludes SIC Codes 4221-4225; Click here for more information.

NCG090000

SIC Codes 285X; Click here for more information.

NCG100000

SIC Codes 5015 and 5093; Click here for more information.

NCG110000

Activities classified as Treatment Works treating domestic sewage, any other sewage sludge or wastewater treatment used for storage, treatment, recycling and reclamation of municipal or domestic sewage; Click here for more information.

NCG120000

Landfills permitted by the North Carolina Division of Waste Management under the provisions of requirements of North Carolina General Statue 130A-294, but excludes open dumps, hazardous waste disposal sites, waste discharge to waters of the state; Click here for more information.

NCG130000

A portion of SIC 5093 and like activities, but excludes establishments engaged in wholesale trade of metal waste and scrap, waste oil recycling and automobile wrecking for scrap; Click here for more information.

NCG140000

SIC Code 3273 and like activities; Click here for more information.

NCG150000

SIC Codes 45XX, but certain activities are excluded such as those maintained by aviation clubs and airport terminal services; Click here for more information.

NCG160000

SIC Code 2951 and like activities; Click here for more information.

NCG170000

SIC Codes 22XX and like activities; Click here for more information.

NCG180000

SIC Codes 25XX, 2434 and like activities; Click here for more information.

NCG190000

SIC Codes 383X and 4493; Click here for more information.

NCG200000

SIC Codes 5093 and like activities, but excludes automobile wrecking for scrap (a portion of 5093), non-metal scrap recycling (a portion of 5093) and SIC Code 5015; Click here for more information.

NCG210000

SIC Codes 24XX and like activities, but excludes SIC Codes 2434, 2491 and 2411; Click here for more information.

NCG240000

SIC Code 2875 and like activities; Click here for more information.

 

How do I apply for permit coverage?

To apply for permit coverage, you must complete, sign and submit the Notice of Intent (NOI) for the respective General Permit number. The NOI form explains the steps for completion and submission. Below are the NOI forms for their respective General Permit:

Can I get an exemption from the permit?

You may get an exemption from the permit if your industrial activities are identified in 40 CFR 112.26 (b) (14) (i)-(ix) or (xi) and if you can certify that there is no exposure at the industrial facility. If your facility is eligible to submit for an exemption, complete, sign and submit a No Exposure Certification (NEC) form.

 

What is the start and end date of my permit?

Below are the start and end dates for each general permit:

General Permit #

Start Date; End Date

NCG020000

October 1, 2015; September 30, 2020

NCG030000

November 1, 2012; October 31, 2017

NCG050000

June 1, 2013; May 31, 2018

NCG060000

December 1, 2012; October 31, 2017

NCG070000

June 1, 2013; May 31, 2018

NCG080000

November 1, 2012; October 31, 2017

NCG090000

November 1, 2012; October 31, 2017

NCG100000

November 1, 2012; October 31, 2017

NCG110000

June 1, 2013; May 31, 2018

NCG120000

November 1, 2012; October 31, 2017

NCG130000

June 1, 2013; May 31, 2018

NCG140000

August 1, 2017; June 30, 2022

NCG150000

September 1, 2017; August 31, 2022

NCG160000

October 1, 2014; September 30, 2019

NCG170000

August 1, 2014; July 31, 2019

NCG180000

September 1, 2014; August 31, 2019

NCG190000

June 2, 2015; May 31, 2020

NCG200000

February 2, 2015; December 31, 2019

NCG210000

August 1, 2013; July 31, 2018

NCG240000

October 2, 2017; September 30, 2022

 

What is my monitoring and reporting period?

The monitoring and reporting periods differ depending on which general permit you fall under. In order to determine your monitoring and reporting periods, please refer to Part V, Sections D and E* for your respective permit below:

*Please note that the part and section referenced above may not hold true for every permit. The information may be located in a different location.

When is my annual report due?

The monitoring and reporting periods differ depending on which general permit you fall under. In order to determine the due date of your annual report, please refer to Part V, Section E (1.)* for your respective permit below:

*Please note that the part and section referenced above may not hold true for every permit. The information may be located in a different location.

Do I need a special certification to write a SPPP?

No, you do not need a special certification to write a SPPP.

Is training required and if so, how often is training required?

Yes, training is required and it should be performed at a minimum once every year. For more information, refer to Part II, Section A (6.)* for your respective permit below:

*Please note that the part and section referenced above may not hold true for every permit. The information may be located in a different location.

Do I have to sample and if so, what do I sample for?

Whether you will need to sample and what you will need to sample for will differ depending on which general permit you fall under. In order to determine these items, please refer to Part II, Section B* for your respective permit below:

*Please note that the part and section referenced above may not hold true for every permit. The information may be located in a different location.

When do I collect samples / How often?

When you will need to sample and how often will differ depending on which general permit you fall under. In order to determine these items, please refer to Part II, Section B* for your respective permit below:

*Please note that the part and section referenced above may not hold true for every permit. The information may be located in a different location.

What happens if my sample results are above benchmark or limits?

North Carolina has a tier-system for dealing with exceeding benchmark values. In the majority of North Carolina general permits, there are three tiers. You fall into Tier One when you exceed a benchmark the first time, Tier Two when two consecutive monitoring periods are exceeding for the same benchmark, and Tier Three when four consecutive monitoring periods are exceeding for the same benchmark. Steps that you are required to take at each tier vary based on which general permit you fall under. For more information on the steps required to be taken and parameters included for the tier-system, refer to Part II, Section B* of your respective general permit below:

*Please note that the part and section referenced above may not hold true for every permit. The information may be located in a different location.

How often do I need to perform inspections?

How often you will need to perform inspections will be based on what general permit you fall under. The majority of general permits require qualitative monitoring visual inspections and facility inspections which are performed semi-annually (January to June; July to December). This frequency and the inspections required may vary based on your respective general permit. For more information, click on your respective general permit below:

What do I inspect?

The majority of general permits require qualitative monitoring visual inspections and facility inspections. Visual inspections require you to inspect each stormwater outfall for any out of the ordinary discharge characteristics such as:

  • colors
  • odors
  • clarity
  • floating solids
  • suspended solids
  • foam
  • oil sheen
  • erosion or deposition at the outfall
  • other indicators of stormwater pollution

Facility inspections require you to inspect the following:

  • stormwater control systems
  • all on-site and adjacent surface waters and wetlands
  • industrial activity areas
  • all drainage features and structures
  • existing structural best management practices (BMPs)
  • material handling areas 

The inspections required may vary based on your respective general permit. For more information, click on your respective general permit below:

Contact Us

Have other questions regarding the North Carolina Stormwater Industrial General Permit that could not be answered by this article? Contact us at (800) 553-7420 or support@mapistry.com.

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