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CITY OF WEST CHICAGO
INFRASTRUCTURE COMMITTEE
AGENDA ITEM SUMMARY
ITEM TITLE:
AGENDA ITEMNUMBER: — 0-9.
Resolution No. 24-R-0023 — 2024 Local Limits Study
Evaluation Report COMMITTEE AGENDA DATE: March 7, 2024
COUNCIL AGENDA DATE: March 18, 2024
STAFF REVIEW: Mehul T. Patel, P.E., Director of Public Works SIGNATURE
APPROVED BY CITY ADMINISTRATOR: Michael L. Guttman SIGNATURE.
ITEM SUMMARY:
Regulated by permit issued by the Illinois Environmental Protection Agency (IEPA), the West Chicago/
Winfield Wastewater Authority's (WCWWA) Regional Wastewater Treatment Plant accepts and treats all
sanitary waste discharged from residential and non-residential properties within the City of West Chicago
and Village of Winfield. Non-residential waste is regulated by the Municipality's Sewer Use Ordinance
(i.e., Chapter 18 of the City of West Chicago Code of Ordinances), which identifies pollutant limitations
and parameters (referred to as local limits) of the waste discharge.
On April 19, 2022, the IEPA Division of Water Pollution Control reissued, to the City, NPDES Permit No.
1L0023469 authorizing the WCWWA’s Regional Wastewater Treatment Plant to discharge to the West
Branch of the DuPage River in accordance with the Effluent Limitations, Monitoring, and Reporting
requirements; Special Conditions and Attachment H Standard Conditions of said permit. Special
Condition 11.A.3 of reissued NPDES Permit No. IL0023469 requires the WCWWVA to conduct a technical
re-evaluation of its local limitations consistent with U.S. EPA’s Local Limits Development Guidance 9
(July 2004) and submit the evaluation and any proposed revisions to the WCWWA’s local limits to the
IEPA and U.S. EPA Region 5 for review and approval. The technical re-evaluation report must be
submitted to the IEPA and U.S. EPA Region 5 by April 19, 2024.
Baxter & Woodman, Inc. of Crystal Lake, Illinois conducted a technical re-evaluation of the WCWWA’s
local limitation, to prepare an evaluation report, and to identify suggested/proposed revisions to the City’s
local limits. Attached for your review and consideration is a copy of the Local Limits Evaluation Report
completed by Baxter & Woodman, Inc., dated February 2024. Table 1 on Page 7 of said report identifies
Baxter & Woodman’s recommendation for changes to the WCWWA’s local limitations for regulated
pollutants of concern. There is only one change recommended in current limits which is decreasing the
current Nickel local limit from 0.9 mg/I to 0.6 mg/l.
The City Council needs to pass a resolution to submit the draft 2024 Local Limits Study Evaluation Report
to the USEPA and IEPA for review and comment. Once the report is finalized the City Council will need to
adopt an ordinance accepting the new local limits.
ACTIONS PROPOSED:
Approve Resolution No. 24-R-0023 authorizing the Mayor to accept the local limit change
recommendations identified in the 2024 Local Limits Evaluation Report and authorize staff to submit said
report to the IEPA and U.S. EPA Region 5 for review and approval.
COMMITTEE RECOMMENDATION:
The Infrastructure Committee voted 6-0 for approval.