Ohio EPA has issued a final general National Pollutant Discharge Elimination
System (NPDES) permit that may provide coverage to only those water treatment
plants that discharge wastewater from plain purification, lime-soda softening
and iron-manganese removal processes in the State of Ohio.
Applicants under this permit include water treatment facilities that
discharge similar type wastewater while producing potable water. Water treatment
plants that discharge wastewater from ion-exchange and reverse osmosis processes
(this includes wastewater from plants using combined treatment of ion-exchange
and iron and manganese removal process) are not covered by this general permit.
The monitoring frequencies for pH and TSS have been reduced to 1/month.
For, Iron and Manganese removal plants, the monitoring frequencies for
suspended iron and manganese have been reduced to 1/month. The frequency for
TRC monitoring remains at 1/month.
The pH limits were inadvertently left out in the effluent tables (under
Iron & Manganese Removal Process). The pH limits (6.5 S.U. to 9.0 S.U.) have
been included in the final permit.
The second sentence in Item B.3) under Part IV. SPECIAL CONDITIONS has
been deleted.
Solids issue including sludge management is now addressed by item “Y” Solids
Disposal under Part V. STANDARD PERMIT CONDITIONS.
The sludge management language in Item “E” under Part IV SPECIAL
CONDITIONS has been substituted by a language that prohibits coverage by
this general permit for water treatment plants that treat concentrated
arsenic streams. This language has also been added under Limitations on
Coverage in Part I.C.2.
