Yes, the leak was stopped during the week of February 20th, 2011.

CAT brought in a temporary tank truck to dispense fuel to the on-site test equipment while the fueling station was completely torn out. After a 27-foot deep excavation (100 ft. by 100 ft.) revealed the vertical extent of the contamination, confirmation soil samples were taken at the floor and at the south, east and west walls of the excavation. The sample results showed no contamination present at levels greater than state cleanup values.

To the north, on the down-hill side of the fueling station and 38 feet below it, a capture trench was constructed to collect any fuel continuing to move out of the soil from the upper part of the bluff. This effectively collects the diesel fuel and routes it to a collection pit for removal by vacuum trucks. This has prevented any further release down the slope to the ravine or to Ten-Mile Creek.

No. The Illinois Department of Public Health (IDPH) has reviewed analytical data from all surface water and stream bank soil samples taken along the creek during the investigation. The results show that chemicals of concern are not present at concentrations that would pose an increased health risk to residents - including children who might play in the creek.

Please note, however, that the Tazewell and Woodford County Health Departments and IDPH wish to remind homeowners along Ten Mile Creek that many septic systems along the creek discharge to the creek. Consequently, children should not be playing in the creek, because they may be exposed to harmful bacteria in the water.

The new fueling station that is being built in the same location as the former station will have a concrete pad and containment as before. It will also have additional safety features in accordance with plans approved by the Illinois Office of the Fire Marshal:

• Fiberglass tanks with double-wall construction;
• State-of-the-art remote leak detection equipment; and
• Piping visible within the containment vault.

CAT contact: Randy Mooberry, Mgr. Plant Operations - (309) 698-5855

To obtain site-related documents through the Illinois EPA's Freedom of Information Act office, please send a request to the address listed below or submit a request to:

http://www.epa.state.il.us/foia/contacts.html referencing the site name Caterpillar Proving Grounds and the IEPA Site no. H2011-0155.

Illinois EPA, Freedom of Information Officer
1021 N. Grand Avenue East, P.O. Box 19276
Springfield, IL 62794-9276
Ph: (217) 782-5236, Fax: (217) 782-9290