dump sites

A footwear manufacturer that's working to clean up dump sites in western Michigan says it expects to spend $40 million addressing groundwater issues.

Wolverine World Wide said Thursday it expects to spend as much as $35 million for ongoing testing and monitoring of groundwater and providing bottled drinking water and water filter systems for people affected by groundwater problems.

It says the remaining estimated costs are associated with consulting and other expenses this year.

Michigan officials say the state's investigation into old tannery waste disposal has expanded. The state Department of Environmental Quality says it's now investigating 75 sites for toxic industrial chemicals that were used by Wolverine World Wide to waterproof shoes.

Department spokesperson Mel Brown says about 26 locations have been referred to the shoe manufacturer for further testing. State officials say the latest testing area includes about 100 homes in Rockford.