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State of New Jersey Department of Environmental Protection
State of New Jersey Department of Environmental Protection
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Phase Two: Moving Science into Action

Additional Measures Implemented Through A Total Maximum Daily Load (TMDL)

Additional Measures is a term specifically used in the New Jersey Discharge Elimination System Municipal Stormwater General Permits issued to municipalities to comply with the United States Environmental Protection Agency Phase II stormwater permitting requirements. These are measures (non-numeric or numeric effluent limitations) that are expressly required to be included in a municipality’s Municipal Stormwater General Permit by an areawide or Statewide Water Quality Management Plan.

Additional measures may modify or be in addition to other permit requirements. Pursuant to 40 CFR 122.34(c)1, more stringent terms and conditions may be imposed, including permit requirements that modify or are in addition to the minimum control measures based on a Total Maximum Daily Load (TMDL) where such terms and conditions are needed to protect water quality. Additional measures, other than numeric effluent limitations, will specify the measures that must be implemented, the measurable goals, and an implementation schedule for each Best Management Practice. DEP will work with stakeholders, including municipalities, to identify additional measures which may be implemented through a TMDL. Some additional measures already identified that could reduce the total nitrogen load include:

  • Adoption of revised Stormwater Control Ordinance for New Development and Redevelopment
    A revised ordinance may reduce the current trigger of one acre of disturbance or one-quarter of an acre of new impervious surface for stormwater management to capture smaller new development and redevelopment projects and may also include additional low impact development requirements.

  • Expanded Stormwater Facility Mapping
    In addition to existing Municipal Stormwater General Permit requirements to map the end of municipally owned outfall pipes, mapping requirements could be expanded to include all stormwater infrastructure. An accurate inventory of stormwater facilities and their condition will help prioritize maintenance and retrofitting, both of which are needed to reduce nutrient (pollutant) loadings into Barnegat Bay.

  • Establish a Schedule to Retrofit Basins to Address Water Quality
    Based on results of the mapping and analysis of data, municipalities may be required to develop a basin retrofit schedule to address water quality and reduce nutrient loading. Retrofitting basins changes the focus from retaining and delaying stormwater runoff to infiltration of stormwater and nutrient (pollutant) removal. Retrofitting would be required when funding is available either through municipal budgets, Environmental Infrastructure Financing Program (principal forgiveness/loan blending) or DEP's Water Quality Restoration Grants program.

  • Illicit Connection Identification and Elimination
    The discharge of sanitary sewage from aging sanitary infrastructure contributes nutrients and pathogens to the Barnegat Bay watershed. For example, pathogens in the Toms River negatively affect river beaches, resulting in advisories and beach closures. An enhanced illicit connection identification and elimination requirement could include ambient water monitoring and the application of source tracking techniques to "find and fix" cross connections and breaks in a municipal sanitary sewer system.

  • Action: Identify, with input of stakeholders, Additional Measures for inclusion in a TMDL

  • Lead: DEP – Division of Water Monitoring and Standards, Division of Water Quality, United States Environmental Protection Agency

  • Partners: Municipal stakeholders, Barnegat Bay stakeholders

  • Progress:
    • $70,000 Water Quality Restoration Grant to expand existing stormwater infrastructure mapping for the Township of Lacey. Funding awarded to Lacey Township in state fiscal year 2018.

    • $30,000 Water Quality Restoration Grant to expand existing stormwater infrastructure mapping for the Borough of Point Pleasant Beach. Funding awarded to Point Pleasant Beach Borough in state fiscal year 2018.

    • $600,000 Water Quality Restoration Grant for use of advanced monitoring techniques to identify potential cross-connections between the sanitary and stormwater systems and other infrastructure issues in the Toms River watershed which will lead to corrective measures and water quality improvements. Funding awarded to Clean Ocean Action in state fiscal year 2018.


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Last Updated: October 4, 2023