The Ohio EPA is public noticing a draft renewal National Pollutant Discharge Elimination System ("NPDES") general permit that will authorize storm water discharges associated with industrial activity. The draft general permit addresses storm water discharges from 29 sectors of industrial activity defined by either the facility's Standard Industrial Classification ("SIC") code or a general description of the facility's activity code.

Per the Ohio EPA, the draft general permit largely reflects the U.S. EPA's current Multi-Sector General Permit and requires the development and implementation of a Storm Water Pollution Prevention Plan ("SWP3"). The purpose of implementing a SWP3 is to control the potential for contamination of storm water by industrial activities. According to the Ohio EPA's Fact Sheet for NPDES:

  • Parts 1-5 of the draft permit consist of general requirements and SWP3 conditions that apply to all regulated facilities.
  • Part 8 of the draft permit includes sector-specific requirements that are dependent on the type of industry. To determine which sector requirements apply to each facility's operations, individual facilities should review Appendix D of the draft permit for more information.
  • Part 6 of the draft permit includes monitoring procedures for facilities subject to quarterly benchmark and/or annual effluent limitation guideline monitoring requirements.

Under the draft permit, the benchmark monitoring is based on collection of four quarterly samples. If the average of the four values for any parameter is below the benchmark value, then no additional monitoring is required for that parameter for the permit term. If the average exceeds the benchmark for a parameter, the facility must then review their SWP3 and control measures and modify them accordingly. The Ohio EPA then would require additional monitoring.

To obtain industrial general permit coverage, each industrial user must submit a Notice of Intent ("NOI") application form. If a facility has coverage under the current general industrial permit #OHR000004 and intends to continue coverage for a storm water discharge associated with industrial activity, a new NOI application form must be submitted within 90 days of the date of the Ohio EPA's written instructions to re-notify. Alternatively, if a facility does not have coverage under the current general industrial permit and intends to discharge storm water, the facility is required to submit an NOI application form 180 days prior to commencing the discharge.

The Ohio EPA intends for the draft permit to become effective after the expiration of the current general permit on May 31, 2011.