Environmental assessment of the nonradioactive wastewater control

The U. S. Energy Research and Development Administration is planning to modify five N Plant discharges and one 100-KE plant discharge to the Columbia River as follows: The 66'' raw water return line discharge will be diverted into the 102'' line outfall. The N Plant filter backwash, coagulator sump wastes, and the regenerative wastes from the ion exchange resin will be diverted to concrete sumps and pumped to two settling ponds. A bar screen will be installed in the 181-N sump pit to prevent floating solids from returning to the river. The 183-KE filter backwash will be diverted to an existing empty sedimentation basin. The backwash will be allowed to settle, and water containing less than 30 mg/l suspended solids will be drained to the river. Nonsignificant potential adverse environmental impact has been identified