STATE OF MICHIGAN DEPARTMENT OF ENVIRONMENTAL .
Concrete Grinding Slurry Exemption Page 2 3. Prior to dewatering, the grinding slurry is managed pursuant to Part 121, Liquid Industrial Wastes (LIW), of Act 451. ... Waste and Hazardous Materials Division Michigan Department of Environmental Quality P 0 Box 30241 Lansing, Michigan . Concrete Grinding Slurry Exemption Page 3