The Ridgefield Planning and Zoning Commission and the Inland Wetlands Board have signed off on plans for improvements to the sewer plant.  Ridgefield residents approved a 48 million dollar sewer project in the fall.  The new approvals are to reduce nitrogen and phosphorous discharges at the District I plant.  That would lead to consolidation of plants.  Wastewater treatment for District II in the Route 7 and 35 area would be piped to the District I plant on South Street.  The renovated plant will have an odor control system.