MPCA requests comments on environmental assessment of Elk River’s wastewater treatment expansion

Contact: Mary Connor, 651-757-2629

St. Paul, Minn. – The Minnesota Pollution Control Agency (MPCA) is inviting public comment on an Environmental Assessment Worksheet (EAW) for the city of Elk River’s wastewater treatment expansion and improvements. The 30-day comment period will end Oct. 1, 2014.

The city of Elk River proposes to expand and upgrade its existing municipal wastewater treatment facility to increase the facility’s capacity for average wet weather flow from 2.2 million gallons to 4.54 million gallons per day. The project will also increase the facility’s ability to meet mandated discharge limits.

Proposed work includes construction of a new extended aeration tank, conversion of the existing primary clarifiers to anaerobic tanks for biological phosphorus removal, removal of existing trickling filters, and construction of a new extended aeration activated sludge basin. Other construction work includes removal of the existing final clarifier sludge wet well, construction of a new sludge lift station and building, and the addition of chlorination and dechlorination equipment. The existing anaerobic digesters and biosolid storage tanks will be converted to aerobic digesters and storage.

The EAW is a preliminary review of the way a proposed project could potentially affect the environment. The EAW also helps the MPCA determine whether an Environmental Impact Statement (a more in-depth environmental review) is needed.

Comments on Elk River’s wastewater treatment expansion should be submitted in writing by 4:30 p.m., Oct. 1, to Nancy Drach, MPCA, 520 Lafayette Road N., Saint Paul, MN 55155-4194 or by fax to 651-297-8683. Comments arriving after this time will not be considered. For more information on the EAW, visit http://www.pca.state.mn.us/oxpg691.