The U. S. EPA and EPA Region 1 have issued the Final National Pollutant Discharge Elimination System (NPDES) general permits for discharges of pollutants to Waters of the U. S. in waste waters from certain dewatering and remediation-related activities. This Dewatering and Remediation General Permit (DRGP) covers discharges to certain waters in the Commonwealth of Massachusetts and the State of New Hampshire, sites in Connecticut and Rhode Island located on Indian Country lands, and federal facilities in Vermont.
This DRGP is a combined reissuance of the Remediation General Permit (RGP) that became effective on April 8, 2017, and expired on April 8, 2022, and the Dewatering General Permit (DGP) that became effective on April 25, 2015, and expired on April 7, 2022. The new general permit combines the former Discharge General Permit (DGP) for non-remediation construction projects with the Remediation General Permit (RGP). The DRGP authorizes discharges of groundwater, surface water, potable water, and storm water associated with following activities: site remediation, site dewatering, infrastructure dewatering and remediation activities, and material dewatering.