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Hazardous Materials Incident Report

*NOTE: The following fields have been deleted or redacted from some of the reports contained in this database: Callback Phone, Number Injured, Number killed, On Scene Contact Phone, Responsible Party Contact Person, Responsible Party Callback Phone.

Incident Number:

H-2025-0781

Incident Report Date:

10/8/2025 5:17:52 PM

Street Address of Incident Location:

135th and New Ave

Incident Location City:

Lemont

Incident Location County:

Will

Entered By:

Mears, Karyn (IEMA)

Data Input Status:

Closed

Leaking Underground Storage Tank (LUST)?:

Caller:

Joseph Jameson

Caller Represents:

CITGO

Hazmat Incident Type: HAZMAT:

Gas or vapor cloud

Incident Location

Date/Time Occurred:

2025-10-08 16:30

Street:

135th and New Ave

City:

Lemont

State:

County:

Will

Milepost:

Section:

Township:

Range:

Area Involved:

Air

Latitude:

41.67301

Longutude:

-88.00634

Media or medium into which the release occurred:

Air

Weather Information

Temp:

Wind:

Unknown

Materials Involved

Name:

SO2

Type:

Gas

CHRIS CODE:

Unknown

CAS#:

7446-09-5

UN/NA #:

Unknown

Is this a 302(a) Extremely Hazardous Substance?:

Is this a RCRA Hazardous Waste?:

Yes

Is this a RCRA regulated facility?:

Yes

Container Type:

Flare

Container Size:

N/A

Amount Released:

500 pounds

Rate of Release/min:

unknown

Duration of Release:

started at 4:30pm and ongoing

Cause of Release:

Compressor Malfunction

Estimated Spill Extent:

N/A

Spill Extent Units:

Date/Time Incident Occurred:

2025-10-08 16:30

Check if Unknown (Occurrence):

Date/Time Discovered:

2025-10-08 16:30

Check if Unknown (Discovered):

WhereTaken:

N/A

On Scene Contact:

Jim Lant

Proper safety precautions to take as a result of the release, including evacuation:

Started cutting back refinery immediately.

Number of People Evacuated:

Assistance needed from State Agencies:

N/A

Containment/cleanup actions and plans:

Unknown still determining what is needed.

Responsible Party

Name:

CITGO

Facility Manager:

Jim Chrisman

Facility Manager Phone #:

630-779-8796

Street:

135th and New Ave

Emergency Units Contacted

Contacted ESDA?:

ESDA on Scene?:

Specific ESDA Agency Contacted:

None

Contacted Fire Department?:

Fire Department on Scene?:

Name of Fire Department Contacted:

None

Contacted Police Department?:

Police Department on Scene?:

Name of Police Department Contacted:

None

Sheriff Police Department?:

Sheriff Department on Scene?:

Name of Sheriff Department Contacted:

None

Was an Agency Other than ESDA, Fire Police or Sheriff Contacted?:

Was this Other Agency On Scene?:

Name of Other Agency Contacted:

None

Agency or Persons Notified

Agency	Date/Time	Name of Person	Notification Action
EPA, OSFM, IDNR, Region, LEPC	2025-10-08 17:18	E-mailed	Report Sent
IEPA DO	2025-10-08 17:18	Nate Dugener	Contacted

Narrative

Follow-Up Information

Please see the attached Follow-up information from CITGO, dated, October 9, 2025. (DMartin 10/14/25)