Springfield—The Illinois Environmental Protection Agency (IEPA) has granted the DeKalb Sanitary District a provisional variance from certain National Pollutant Discharge Elimination System (NPDES) water discharge permit conditions, in order to complete necessary repairs to the rotary distributor of the #2 trickling filter.
The DeKalb Sanitary District requested the variance in order to rebuild the rotary distributor, including bearings and seals. The distributor arms must be dismantled to achieve repairs. While the trickling filter is out of service the District will not be able to meet certain effluent limits and design maximum flow.
The DeKalb Sanitary District is the designated authority for planning, collection and treatment of wastewater in DeKalb Township, Afton Township and parts of Cortland Township. The District currently serves approximately 55,000 users. The District receives and treats all wastewater at its Main wastewater treatment plant.
The DeKalb Sanitary District must continue to meet all other effluent conditions in its NPDES permit and must operate the treatment plant to produce the best effluent possible at all times. In addition, the District must closely monitor the Kishwaukee River and immediately notify the Agency of any adverse environmental impacts as a result of this discharge.
The Illinois EPA has determined that any environmental impact from the variance must be closely monitored, and the Agency must be notified immediately of any adverse impacts; no reasonable alternative appears to be available; no public water supplies will be affected; no federal regulations would prohibit granting the request; and the facility would face an arbitrary and unreasonable hardship if the Agency did not grant the requested variance.
The provisional variance will end no later than April 13, 2012.