Portage Mayor John Cannon wants ArcelorMittal to pay for independent daily testing at the Little Calumet River’s east branch where a chemical spill killed 3,000 fish earlier this month, a release said.

He also wants the company to help replenish the fish. The steelmaker has not said if it will do either, Cannon said. Representatives for ArcelorMittal did not immediately respond for comment.

“Currently, the taxpayers of the City of Portage will incur the cost of the third party sampling with the invoices sent to ArcelorMittal to receive reimbursement,” Cannon said.

Outside testing should independently confirm ArcelorMittal’s results, he said. Cannon is also asking the Indiana Department of Natural Resources to report any other wildlife impacted by the cyanide and ammonia spill.

ArcelorMittal admitted responsibility Aug. 16 for the chemical spill, while beaches closed temporarily in Portage and Ogden Dunes. Affected fish species included panfish, shad, channel catfish, bass and walleye, officials said. Cannon blamed IDEM for not notifying him for several days.

The steelmaker released testing results that showed 911 pounds per day of ammonia was found in the river near Burns Harbor on Aug. 11, while 188 pounds per day of cyanide was found two days later on Aug. 13. Both chemicals dissipated to undetectable levels by Aug. 18, according to IDEM.

On Aug. 20, U.S. Steel reported a “discoloration” from a discharged into Burns Waterway. Portage officials later said it was a petroleum spill.