Stormwater Permitting for Tennessee Projects
In Tennessee, permits under the state's National Pollutant Discharge Elimination System program are required for construction sites and related support activities to avoid pollution from stormwater runoff. Specifically, a General NPDES Permit for Discharges of Stormwater Associated with Construction Activities ("General Permit") is necessary for all construction activities involving one or more acres of land or that are part of a common plan of development or sale of more than one acre. To obtain a General Permit, applicants must file a Notice of Intent with the Tennessee Department of Environment and Conservation ("TDEC") Environmental Field Office. This must include a map of the proposed site and the receiving water or storm sewer, as well as a site-specific Storm Water Pollution Prevention Plan ("SWPPP") thatdetails the Best Management Practices ("BMPs") to be used in preventing soil erosion and controlling sediments. The applicant must commit to implementingmaintenance and inspection procedures throughout the construction period and keeping records for the following three (3) years.Notices of Intent are not transferable and new owners must submit a newapplication. Once a Notice of Coverage is issued to an applicant, construction activities may commence, but this is NOTan approval of the SWPPP.SWPPP modifications may still be requiredif the proposed BMPs fail to prevent erosion and control sediment. In preparing a SWPPP, it's crucial to identify the TDEC classification of the receiving waters. Three classifications of note are: Outstanding, Exceptional and Impaired.
- Outstanding waters constitute a national resource, such as waters in national and state parksor waters with particular recreational or ecological significance.
- Exceptional watersinclude those within state or national parks, wildlife refuges, Federal Wild and Scenic Rivers, waters supporting threatened or endangered species and other waters of exceptionalbiologic, ecological or recreational values.
- Impaired waters are defined as waters not meeting their designated uses and states are required to identify these waters under Section 303(d) of the Clean Water Act. These waters have one or more properties that violate water quality standards or are expected to exceed water quality standards within two years, and need additional pollution controls.
Posted in: Environmental Protection Agency, Water Regulations