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CITY OF WEST CHICAGO
INFRASTRUCTURE COMMITTEE
AGENDA ITEM SUMMARY
ITEM TITLE:
AGENDA ITEM NUMBER: __7. G.
Resolution No. 23-R-0006 — Contract Award — Donohue &
Associates, Inc. - A2O Phosphorous Removal Project for
the West Chicago/Winfield Wastewater Authority Regional
Wastewater Treatment Plant in the Not-to-Exceed Cost of
$288,570.00
COMMITTEE AGENDA DATE: February 2, 2023
COUNCIL AGENDA DATE: February 20, 2023
SIGNATURE es ae
SIGNATURE
STAFF REVIEW: Mehul T. Patel, P.E., Director of Public Works
APPROVED BY CITY ADMINISTRATOR: Michael L. Guttman
ITEM SUMMARY:
The West Chicago/Winfield Wastewater Authority (WCWWA) Regional Wastewater Treatment Plant (WWTP)
operates under an NPDES permit regulated by the Illinois Environmental Protection Agency (!EPA); Permit No.
1L0024369. As authorized by the Clean Water Act, the NPDES Permit Program controls water pollution by
regulating point sources that discharge pollutants into waters of the United States. Water pollution degrades
surface waters making them unsafe for drinking, fishing, swimming, and other activities. Industrial, municipal, and
other facilities must obtain permits from the IEPA if their discharges go directly to surface waters and must renew
their permits every five years. For years, the USEPA has pressured the IEPA to impose new and stricter nutrient
removal limitations on wastewater treatment plants consistent with national policy. The most recent IEPA NPDES
permit for the WCWWA WWTP expires on April 30, 2027.
Since 2015, the WCWWA has been a member of one local environmental group, the DuPage River Salt Creek
Workgroup (DRSCW), formed in 2005 in response to concerns about Total Maximum Daily Loads (TMDLs) being
set for the East & West Branches of the DuPage River and Salt Creek, which is made up of local communities,
Publically Owned Treatment Works (POTWs) or WWTPs, and private environmental organizations. The DRSCW
has been working to produce comprehensive data sets for local watersheds to determine and resolve priority
stressors to local aquatic systems. The organization continues to implement targeted watershed activities that
resolve priority waterway problems efficiently and cost effectively. Working directly with the other environmental
groups and the IEPA, the DRSCW has created, submitted, and received support for the implementation of special
permit conditions and stream restoration projects. It is DRSCW’s plan that implementation of its stream
restoration projects will produce the greatest improvement in water quality and habitat for less money than
individual POTW projects. Because of being a member of the DRSCW and paying Project Funding Assessments
participating POTWs received a temporary reprieve from the IEPA to upgrade its own POTW and comply with
strict phosphorus limits likely to be imposed by the IEPA. The WCWWA agreement with DRSCW expired on
December 31, 2022, at which time WCWWA stopped paying Project Funding Assessments. As a result, in
WCWWA’s current NPDES permit, a special condition has been added which states the total phosphorus removal
limits of 1.0 mg/l would be effective Oct 1, 2026.
1
On December 7, 2020, authorized by Resolution No. 20-R-0076, the Mayor executed a contract with the Donohue
& Associates, Inc. (Donohue) for a Phosphorus Removal Pilot Study at the West Chicago/Winfield Wastewater
Authority (WCWWA) Regional Wastewater Treatment Plant. This study was completed and final report was
provided in January 2022. The study recommend four different options to reduce the total phosphorus limits below
1.0 mg/l. After review of the report and discussions with WWTP contracted staff, the consensus is to implement an
option called “Anaerobic/Anoxic/Oxic (A2O)” to achieve the total phosphorus limits. This option will also provide the
WCWWA with total nitrogen removal, limits for which will be coming down the road. With this option, the study
shows, WCWWA can achieve 0.37 mg/l total phosphorus removal limits, which would be significantly below the
1.0 mg/l. The IEPA in the past has suggested more stringent total phosphorus removal limits including 0.5 mg/I

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CITY OF WEST CHICAGO
and 0.1 mg/l.
Based on its staff's knowledge and familiarity with the project, staff recommends retaining Donohue to
provide design engineering services proposal to implement the A2O project. Its scope of work will be including
but not limited to periodic site survey, hydraulic calculations, process design, equipment evaluation,
preliminary design, final design, technical specification, permitting, bidding, etc. As part of its scope,
Donohue reps will also work with DRSCW to assist the WCWWA in securing a long-term total
phosphorus removal limits should IEPA decide on stringent limits. Donohue’s initial proposal was for
$330,900.00, which was reduced to $288,570.00 after successful negotiations. Staff feels the proposed
fee is appropriate for an estimated project cost of $4.2 million.
The design engineering services will be paid for by the WCWWA.
ACTIONS PROPOSED:
Approve Resolution No. 23-R-0006 authorizing the Mayor to execute an Agreement with Donohue &
Associates, Inc. for professional engineering services related to the A2O Phosphorous Removal Project
for the West Chicago/Winfield Wastewater Authority Regional Wastewater Treatment Plant in the not-to-
exceed cost of $288,570.00
COMMITTEE RECOMMENDATION:
The Infrastructure Committee voted 7-0 for approval.