Illicit Discharge Detection and Elimination (IDDE)
GOALS and OBJECTIVES of: Knox County's Illicit Discharge Detection and Elimination Program:
As a NPDES Phase II MS4 community, Knox County has specific permit requirements relating to illicit discharge detection and elimination. Knox County must:
- Develop, implement and enforce a program to detect and eliminate illicit discharges into the MS4 conveyance system including, but not limited to:
- Completing a storm sewer system map, showing the location of all outfalls and the names and location of all use-designated waters of the state under the MS4 operator’s control that receive discharges from those outfalls.
- Prohibiting through an ordinance or other regulatory mechanism, non-stormwater discharges into the storm sewer system and implement appropriate enforcement procedures and actions.
- Developing and implementing a plan to detect and address non-stormwater discharges, including illegal dumping into the MS4.
- Informing public employees, businesses, and the general public of the hazards associated with illegal discharges and improper disposal of waste
- Prohibiting contamination of stormwater runoff from hot spots
Existing Illicit Discharge Identification and Elimination BMPs as of
Feb 2003-Nov 2008
- Knox County has developed a storm sewer map identifying the location of all outfalls and the names and locations of all waters of the state that receive discharges from those outfalls. The map was created using Geographic Information System (GIS) mapping software To maximize effectiveness of this portion of the IDDE program, Knox County field staff will receive training and education regarding illicit discharges and the procedures to follow if an illicit discharge is found. In addition, Knox County will continually update information regarding outfalls and conveyances on the GIS map.
- Knox County’s Ordinance for Stormwater Management, O-07-12-101 Section 12 prohibits all non-stormwater discharges into the MS4. Section 16 of the same ordinance details the penalty and appeal process. The Knox County Stormwater Enforcement Protocol explains appropriate enforcement procedures and actions to be taken regarding stormwater violations concerning illicit discharges and illegal dumping.
- Knox County has many programs in place to detect and address non-stormwater discharges in the MS4: (note: Knox County has not formalized these programs into a cohesive plan to date)
- Adopt-A-Stream: this program trains volunteers to monitor adopted stretches of a creek. Part of the training includes illicit discharge detection and reporting.
- Stream Assessments and Monitoring: As part of the stormwater program, Knox County staff routinely assesses and monitors stream health. Field staff are trained to detect and report any illicit discharges when they are encountered.
- Complaints and Tracking: Citizen complaints regarding illicit discharges are investigated and appropriate actions are taken. The complaints are entered into a tracking system.
- Partnerships: Knox County has formed several partnerships (Beaver Creek Task Force, Stock Creek Task Force, Americorps, etc.,). Through these local watershed initiatives, the public is educated in holistic watershed management. These partnerships provide Knox County with an expanded network of informed citizens that are an active (not passive) approach to illicit discharge detection.
Knox County has:
- Created a pollution prevention/good housekeeping seminar for employees in 6 municipal departments. The training is given annually with additional follow-up site visits to the departments to help them detect and eliminate illicit discharges from municipally owned/operated sites. This seminar discusses the hazards of illicit discharges, the types of discharges typically generated from different municipal operations and best management practices that can be installed to eliminate those types of discharges
- Partnered with a local watershed group to implement a hot spot education seminar for restaurant and food facilities. This seminar discusses the hazards of illicit discharges, the types of discharges typically generated from a food facility and best management practices that can be installed to eliminate those types of discharges. Each restaurant is also given a Special Pollution Abatement Permit (SPAP) to complete and return.
Knox County’s Ordinance for Stormwater Management, O-07-12-101 Section 4.6 sets forth requirements for land uses considered to be pollutant hotspots.