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Division of Environmental Assessment and Restoration

Methods for Calculating Project Reductions

Tools and Guidance for Calculating Total Nitrogen (TN) and Total Phosphorus (TP) Reductions for Restoration Projects

This website describes the DEP methods to calculate total nitrogen (TN) and total phosphorus (TP) reductions for watershed restoration, when site-specific information is not available. This guidance and calculation methods are related to the development and implementation of BMAPs, 4e plans, and 4b/reasonable assurance plans (RAPs). 

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