What are sanitary sewer overflows?
The City of Franklin received an updated NPDES permit that became effective July 1, 2017 that defines a difference between a release and overflow. In each below definition, the permittee is defined as the City of Franklin.
A release is defined as “the flow of sewage from any portion of the collection or transmission system owned or operated by the permittee other than through permitted outfalls that does not add pollutants to waters. In addition, a “release” includes a backup into a building or private property that is caused by the blockages, flow conditions, or other malfunctions originating in the collection and transmission system owned or operated by the permittee. A “release” does not include backups into a building or private property caused by blockages or other malfunctions originating in a private lateral.
A “sanitary sewer overflow” is an unpermitted discharge of pollutants from the collection or transmission system owned or operated by the permittee other than through a permitted outfall.
For either situation, the discharge of sewage can be attributed to the following causes:
- Blockages of sewer lines often due to grease, rags, or other materials wrongfully put into these sewer lines.
- Infiltration/inflow of excessive stormwater into sewer lines during heavy rainfall.
- Malfunctions of pumping stations, either equipment or electrical outages.
- Broken sewer lines, caused by construction, line failure, or geologic conditions.
IF YOU ARE EXPERIENCING A RELEASE OR OVERFLOW, PLEASE CALL THE WATER MANAGEMENT DEPARTMENT AT (615) 794 – 4554 MONDAY-FRIDAY 7AM TO 4PM. CALL (615) 791 – 3260 AFTER HOURS, WEEKENDS, AND HOLIDAYS.
The City is required to initially report releases and overflows to the Tennessee Department of Environment and Conservation within 24 hours. Basic information will be reported here within two (2) business days of the event.
List of Releases
|Date/Time||Location||Status||Duration||Estimated Volume||Cause||Detailed Report|
|1/31/2018 @ 7 am||920 Market St||Resolved||1 Hour and 5 Minutes||9,750 Gallons||
Air Relief Valve malfunctioned
|920 Market St|
List of Overflows
|| Estimated Volume
|| Detailed Report
|2/11/2018 @ 9:15 am||537 Ploughmans Bend||Resolved||15 Hours 50 Minutes||48,000 Gallons||Wet Weather||537 Ploughmans Bend Dr|
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