a There are two underground injection wells at Cabot Corporation facility
These wells are tested at least annually to ensure that they maintain mechanical integrity (i.e., there is no
significant leakage in the casing, tubing or packer or no significant fluid movement into an underground
source of drinking water). If a well should fail a mechanical integrity demonstration, it will be shut down
immediately until corrective actions are complete and the well has been brought back into compliance. The
conditions of the permit limit the injection pressure to ensure safe operation of the well.
8. Contaminated Sites
Successful completion of cleanup program requirements results in a completion letter. The table below shows
the type of completion letters issued by the Illinois EPA cleanup programs.
9. Contaminated Areas Evaluated and Ready for Remediation
Contaminated areas are generally brought to the attention of the Illinois EPA through citizen
complaints, notification of a release as required by permit or regulation, or referrals from other
governmental agencies.
Before actions are taken at a site, the Illinois EPA considers many factors including (a) identified
release or threatened release of a hazardous substance or pesticide; (b) risk to human health; (c)
ecological concerns; (d) availability of funds; (e) releases or threatened releases at other sites requiring
greater urgency; (f) public concern about the site; (g) benefits of the investigation or remediation (e.g.,
potential for redevelopment); and (h) potential costs recovery (i.e., responsible parties who are able to
conduct the corrective action).
Remediation activities may include (a) investigation to determine the nature and extent of contamination; (b)
removal of hazardous substances from the site (e.g., removal of hazardous waste drums or contaminated soil);
(c) containment of hazardous substances (e.g., installing and maintaining a landfill cap and leachate collection
system); (d) treatment of hazardous substances (e.g., incineration or bioremediation of contaminated soil); (e)
post-remedial activities (e.g., groundwater monitoring); and (f) administrative activities (e.g., cost recovery).
Facility Illinois Identification Number Location
Cabot Corporationa 418080001 Tuscola
LTV Steel 1558010006 Hennepin
Equistar 418080002 Tuscola
Program Types of Completion Letters
Issued in 2001
Authority
Leaking Underground
Storage Tank (LUST)
· 835 No Further Remediation (NFR)
Letters
· 415 ILCS 5/57.10
Site Remediation Program
· 4(y) Letter = none
· 169 NFR Letters
· 415 ILCS 5/4 (y)
· 415 ILCS 5/58.10
National Priorities List
(Superfund)
· 3 Construction Completed
· CERCLA
· SARA
Response Action
· Termination and Satisfaction Letter
= none
· 415 ILCS 5/4 (q)
Federal Facilities
· 4 Finding of Suitability for Transfer
Letters
· 15 NFR Letters
· 4(y) Letter = none
· 42 U.S.C. 9620(h)(3)
· 415 ILCS 5/4 (y)
· 415 ILCS 5/57.10
Resource Conservation
and Recovery Act (RCRA)
· 12 Closure Letters
· NFR Letters = none
· 4(y) Letter = none
· 35 Ill. Adm. Code 725.215
· 415 ILCS 5/58.10
· 415 ILCS 5/4 (y)
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