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Sectors of Industrial Activity that Require Permit Coverage
The MSGP-2000 covers 30 industrial sectors that fall into one or more of the 11 categories of stormwater discharges associated with industrial activity described in 40 CFR 122.26(b)(14)(i)-(xi). The 30 sectors are listed in Table 1-1 (page 4) of the MSGP-2000 [PDF] and are defined by either the facility's Standard Industrial Classification (SIC) code  or a general description of the facility’s industrial activities. The North American Industry Classification System (NAICS) will eventually replace the SIC system. The U.S. Census Bureau has a conversion table to bridge the two systems.
Operators of industrial facilities or sites with activities included in one of these 11 categories must obtain coverage under an NPDES industrial stormwater permit, unless conditionally excluded. The list provided below describes the types of industrial activities within each category.
- Category One (i): Facilities with effluent limitations
- Category Two (ii): Manufacturing
- Category Three (iii): Mineral, Metal, Oil and Gas
- Category Four (iv): Hazardous Waste, Treatment, or Disposal Facilities
- Category Five (v): Landfills
- Category Six (vi): Recycling Facilities
- Category Seven (vii): Steam Electric Plants
- Category Eight (viii): Transportation Facilities
- Category Nine (ix): Treatment Works
- Category Ten (x): Construction Activity *
- Category Eleven (xi): Light Industrial Activity
*Category Ten (x): Construction Activity that disturbs 5 or more acres of land is included in the definition of "stormwater discharges associated with industrial activity." However, EPA opts to permit these types of activities separately from other industrial activities because of the significant difference in the nature of these activities. In addition, EPA also requires permit coverage for small construction that disturbs from 1 to 5 acres of land. More information about stormwater discharges from construction activities is available.
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