MCM #3 Illicit Discharge Determination and Elimination (IDDE)

The ODOT District MS4 Liaison Duties dated 2/23/17 has two parts The ODOT District MS4 Liaison Duties dated 2/23/17 has two parts. Part 1 being what to do when notification of a problem is received in the MS4 Area and part 2 defines the process to investigate outfalls in the MS4 Area.

PART 1 Notification of a suspected illicit discharge from a Home Sanitary Treatment System (HSTS) in the MS4 Area. When a notification of a suspected illicit discharge from any of the following:

Maintenance activities Construction Routine asset Inventory Asset Inspection

The District MS4 Liaison will check to see if the problem is in the MS4 area. http://gis.dot.state.oh.us/tims/Map/hydraulic engineering Turn on MS4 Urbanized Boundary 2010

If not in the MS4 area then do what the District is currently doing.

If in the MS4 area then do what the District is currently doing with the following additions:

Perform an investigative site visit (visual observation) odor color turbidity floatables To confirm and document the suspected illicit discharge (document the information on an ODOT IDDE form) \\itcfs007.dot.state.oh.us\idrive\hy\Environmental\MS4 Program\IDDE Program\ODOT IDDE Form (Jan 2016).pdf Appendix E

Coordinate with District R/W Permit Office to determine if there is an R/W permit for the discharge

If the discharge is suspected to be illicit and from an ODOT R/W permitted HSTS or an adjacent interconnected MS4 then:

Send the Board of Health (Local Health Department) or the adjacent interconnected MS4 (if applicable) a letter containing the information found during the site visit.

Maintain communication with the Board of Health and the adjacent interconnected MS4 (if applicable) at a minimum of an annual frequency to inquire about the status of the identified outfalls.

If the discharge is suspected to be illicit and is not from an ODOT R/W permitted HSTS or is not from an adjacent interconnected MS4, then it will be considered an unpermitted use of Right-Of-Way. Notify ODOT Office of Chief Legal of the illicit discharges.

Follow the obstruction removal procedures in O. R. C. 5515 Follow the obstruction removal procedures in O.R.C. 5515.02 under the direction of ODOT’s Chief Legal Department. Appendix A

Annually report to the Office of Hydraulic Engineering (OHE) on the following:

Number of notifications of a suspected illicit discharges received in the MS4 Area

Number of discharges confirmed to have visual observation of odor, color, turbidity, or floatables and have an ODOT R/W HSTS permit in the MS4 Area

Number of discharges confirmed to have visual observation of odor, color, turbidity, or floatables and DO NOT have an ODOT R/W HSTS permit in the MS4 Area

Number of illicit discharges that were eliminated and how each one was addressed reported in the MS4 Area

PART 2 Dry Weather Outfalls ODOT District MS4 Liaison will perform or direct the following:

Investigate all Low Priority locations as defined in ODOT’s MS4 Stormwater Outfall Inventory Manual appendix D by December 31, 2018. Investigation will include: Check to make sure it is in fact an outfall in ODOT’s MS4 area. TIMS Check to make sure it is an outfall as defined on Page 1 of the ODOT MS4 Storm Water Outfall Inventory Manual Appendix B Do a Visual field screening to determine if there is still a dry weather flow at the location. Compare the information between the original screening and the one being done for the items listed on Page 18 of the ODOT MS4 Storm Water Outfall Inventory Manual. Appendix C

Locate the source – dwelling or adjacent MS4 Check to see if the source is permitted Report any remaining dry weather flows to OHE. Notify OHE of any unpermitted use of R/W discharges and the actions taken to eliminate them.

Questions