MS GP 3-9003

1. NPDES Multi-Sector General Permit for Industrial Activity Stormwater Discharges (MS GP 3-9003)

The Multi-Sector General Permit (MSGP) is a Federally mandated National Pollutant Discharge Elimination System (NPDES) permit that covers new and existing discharges of stormwater from industrial facilities. Industrial facilities conduct activities and use materials that have the potential to impact the quality of Vermont’s waters. The MSGP requires facilities to examine potential sources of pollution, implement measures to reduce the risk of stormwater contamination, and test stormwater discharges for sources of pollution. In the State of Vermont, the Agency of Natural Resources – Department of Environmental Conservation (Vermont DEC) is the permitting authority and administers the MSGP on behalf of the U.S. Environmental Protection Agency (EPA). Permit coverage is required by private and municipal industries identified on the MSGP Standard Industrial Classification (SIC) code list. EPA Activities requiring permits

Exempt from coverage under the MSGP are facilities classified as Municipal and Highway Garages. VTrans has developed Storm Water Pollution Prevention Plans (SWPPP) for all of its facilities statewide that require coverage. Most facilities do not meet the jurisdictional threshold for requiring MSGP permitting. In the VTrans MS4 area, the District 5 Maintenance Facility in Colchester does not require MSGP coverage; however, VTrans has developed a Stormwater Management Plan for this facility to support MS4 General Permit requirements. It is up to date and undergoing periodic inspections and audits supervised by the VANR Environmental Assistance Office.

VTrans coverage under this permitting program is required for 9 of the 10 state airports and 4 active sand and gravel pits. VTrans maintains compliance under this program by filing a Notice of Intent (NOI) with the Vermont DEC, maintaining the required Stormwater Pollution Prevention Plans (SWPPP), and conducting water quality monitoring and reporting to Vermont DEC for each regulated facility.

Each Storm Water Pollution Prevention Plan:

  • Designates individual and team member roles and responsibilities;

  • Provides site location and facility information;

  • Describes and maps the site, receiving waters, precipitation, inventory of exposed materials and potential pollutant sources, inventory of past spills and leaks, certification of non-stormwater discharges and allowable non-stormwater discharges;

  • Describes structural and non-structural best management practices addressing source protection, materials handling, storage and disposal, spill response, vehicle and equipment washing, sediment and erosion control;

  • Describes best management implementation practices addressing routine inspections, employee training, water runoff and water quality monitoring and reporting to the Vermont DEC Water Quality Division; and

  • Describes the implementation schedule and provisions for amendment of the plan.

Coverage applies to the following VTrans Facilities:

  • W.H. Morse State Airport – Bennington

  • E.F. Knapp State Airport – Berlin

  • Rutland State Airport – Clarendon

  • Newport State Airport – Coventry

  • Franklin County State Airport – Highgate

  • Caledonia State Airport – Lyndon

  • Middlebury State Airport – Middlebury

  • Morrisville-Stowe State Airport – Morrisville-Stowe

  • Hartness State Airport – Springfield

  • East Dorset Sand/Gravel Pit

  • Hinesburg Sand/Gravel Pit

  • Middlesex Sand/Gravel Pit

  • Calais Sand/Gravel Pit

"No Exposure" Exemptions have been granted for:

  • J.H. Boylan State Airport - Brighton

Non-Regulated Stormwater Management Plans are in place for the following facilities but are not subject to the MSGP:

  • District 5 Colchester Maintenance Facilities at Fort Ethan Allen and at Chimney Corners

For more information or copies of relevant documents, please contact Jennifer Callahan.