IN.gov - Skip Navigation

Note: This message is displayed if (1) your browser is not standards-compliant or (2) you have you disabled CSS. Read our Policies for more information.

Amber Alert
Amber Alert - TEST
Find Out Where to Recycle

Indiana Department of Environmental Management

IDEM > Permitting > Water Permits > Wet Weather - CSO & Storm Water (Rule 5, 6, & 13) > Storm Water Permitting > Industrial Storm Water Permitting (327 IAC 15-6, Rule 6) > Definitions Applicable to the Industrial General Storm Water Permit Definitions Applicable to the Industrial General Storm Water Permit

  • Best Management Practices:
    • Best management practices (BMPs) means any of the following measures to prevent or reduce the pollution of waters of the state:
      • schedules of activities;
      • prohibitions of practice;
      • treatment requirements;
      • operation and maintenance procedures;
      • use of containment facilities; and,
      • other management practices.
    • BMPs may be employed, for example, to control plant site run-off, spillage or leaks, sludge or waste disposal, or drainage from raw materials storage, resulting from regulated industrial activities.
  • Combined Sewer System:
    • A combined sewer system means a system of combined sewers that: (1) is designed, constructed, and used to receive and transport combined sewage to a publicly owned wastewater treatment plant; and (2) may contain 1 or more overflow points that discharge combined sewage entering the publicly owned wastewater treatment plant when the hydraulic capacity of the system or part of the system is exceeded as a result of a wet weather event.
  • Outfall:
    • An outfall is the area where storm water is collected, concentrated, and/or conveyed and then discharges into a water of the state. Point source outfalls include, but are not limited to, any points from which pollutants are or may be discharged: pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, landfill leachate system, vessel, or other floating craft. Drainage is defined in 327 IAC 15-6 as the flow patterns of storm water run-off.
  • Point Source:
    • A point source is any discernable, confined, and discrete conveyances, including, but not limited to, any of the following from which pollutants are or may be discharged: pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, landfill leachate system, vessel, and/or other floating craft.
      • The term includes all waters of the United States, as defined in Section 502(7) of the federal Clean Water Act (33 U.S.C. 1362(7)), that are located in Indiana.”
      • The term does not include return flows from irrigated agriculture or agricultural storm run-off. See 327 IAC 5-2-4(a)(4) for other exclusions.”
  • Qualified Professional:
    • An individual who is trained and experienced in storm water treatment techniques and related fields as may be demonstrated by state registration, professional certification, experience, or completion of coursework that enable the individual to make sound, professional judgments regarding storm water control or treatment and monitoring, pollutant fate and transport, and drainage planning.
  • Responsible Official:
    • A responsible official/individual is defined in 327 IAC 15-4-3(g). For a corporation, a responsible corporate officer means a president, secretary, treasurer, any vice president of the corporation in charge of a principal business function, or any other person who performs similar policy or decision making functions for the corporation; or the manager of 1 or more manufacturing, production, or operating facilities employing more than 250 persons or having gross annual sales or expenditures exceeding $25,000,000, if authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. For a partnership or sole proprietorship, by a general partner or the proprietor, respectively. For a municipality, state, federal, or other public agency or political subdivision thereof, by either a principal executive officer or ranking elected official.
  • Storm Water:
    • For the purposes of this permit storm water is rainfall, snow, snow-melt, ice-melt and the associated run-off.
  • Storm Water Discharge Exposed to Industrial Activity:
    • Storm water discharge that has been exposed to the manufacturing and processing activities, or raw materials or intermediate products storage areas at an industrial facility. "Storm water discharge exposed to industrial activity" may also include:
      • Storm water discharges from industrial plant yards.
      • Immediate access roads and rail lines used or traveled by carriers of raw materials, manufactured products, waste material, or byproducts used or created by the facility.
      • Material handling sites.
      • Refuse sites.
      • Sites used for the application or disposal of process wastewaters (as defined in 40 CFR 401).
      • 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 finished products.
      • Areas where industrial activity has taken place in the past and significant materials remain and are exposed to storm water.
  • Storm Water Pollution Prevention Plan (SWP3) and its requirements:
    • The Storm Water Pollution Prevention Plan (SWP3) is used to identify potential and actual storm water pollutant sources, and to determine best management practices and measures that will minimize the pollutants transported in storm water run-off. The SWP3 is retained at the facility, and should be updated as facility conditions change. The SWP3 must include:
      1. a topographic map of the facility area;
      2. a facility representation, showing the location of relevant storm water items;
      3. a soils map of the facility area;
      4. a narrative description of existing and planned management practices and measures to improve the quality of storm water run-off;
      5. a preventative maintenance program;
      6. a spill response program;
      7. a non-storm water assessment; and,
      8. a comparison of the sampling analyses results.
  • Water of the State:
    • According to Indiana Code § 13-11-2-265, "waters" means the accumulations of water, surface and underground, natural and artificial, public and private, or a part of the accumulations of water that are wholly or partially within, or flow through, or border upon Indiana. The term does not include private ponds, or ponds, reservoirs, or facilities built for the reduction or control of pollution or cooling water before discharge, unless the discharge from the pond, reservoir, or facility causes or threatens to cause water pollution.