Do changes specified in the periodic certification require NPDES permits to be reopened?
The method in which changes are incorporated into NPDES permits may vary depending on the locality, state, or region in which the facility is located; however, it may be possible to set up the permit to specify that the P2 practices and appropriate treatment requirements for the PFPR rule are located in an approved plan, as is done with spill control plans. This method may allow changes in practices or treatment to be incorporated without reopening the whole permit.
