Springfield—The Illinois Environmental Protection Agency (IEPA) has granted the Downers Grove Sanitary District a provisional variance from the National Pollutant Discharge Elimination System (NPDES) water discharge permit limits in order to perform maintenance to Outfall 1, of the District’s wastewater treatment plant.
The District owns and operates the wastewater treatment plant in the Downers Grove area. It serves approximately 65,000 primarily residential users. The plant is located on St. Joseph Creek, immediately east of Interstate 355.
The provisional variance will allow the District to discharge all treated effluent from Outfall 2, while it removes tree roots that constrict the flow from Outfall 1, the plants main outfall. The tree roots constrict the flow and must periodically be removed. The maintenance is expected to take approximately three to five days, weather permitting.
The IEPA has determined that the environmental impact from the variance would be minimal, 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 IEPA did not grant the requested variance.
The Downers Grove Sanitary District must ensure operation of its treatment plant to produce the best effluent possible at all times. Any environmental impact from the requested relief will be closely monitored, and the Agency must be immediately notified of any adverse impacts.
The provisional variance ends no later than May 18, 2012. All other NPDES permit requirements will remain in effect.