ITEM 1 Wastewater Treatment Facility Expansion and Odor MitigationITEM I
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tsTeFMISOTA
MEMORANDUM
TO: Mayor and City Council
FROM: Lori Johnson, City Administrator
DATE: May 4, 2015
SUBJECT: Wastewater Treatment Facility Expansion and Odor Mitigation
Beginning last fall, the City requested technical engineering reports from SEH and AE2S on the
West WWTF expansion and odor mitigation items. Subsequently, the Public Works
Subcommittee heard presentations from both firms summarizing the technical memorandums
from the two engineering firms. The Public Works Subcommittee recommended that Mr. Scott
Schaefer from AE2S present the results of the AE2S study to the full Council.
On Wednesday, Mr. Schaefer will present a synopsis of the current situation along with possible
options to resolve the odor and capacity issues. This initial meeting will give the Council an
understanding of the initial design assumptions of the facility when constructed, why the
problem is occurring now, and possible ways to fix the problem. The preliminary estimated
costs varied considerably in the draft studies thus additional engineering analysis is needed to
thoroughly evaluate the options and to accurately estimate costs to provide the Council enough
information to determine which option will be the most effective and efficient.
Further, the two studies included several recommendations for operational procedure/process
changes, and those recommendations have been implemented. Those operational changes
have not fully resolved the odor issues based on the recent comments received from residents
near the West facility. Utility Manager, Kurt Neidermeier, Utility Operator Seth Wilkes and City
Engineer Ron Wagner will be at the meeting to answer questions and explain facility
operations.