Materials Company: “Heritage Slag Products, L.L.C. came to the Illinois market several years ago to produce steel slag. We employed CTL for our Quality Control testing needs. We were very pleased with how dependable they were on test turn-around, and their knowledge of ever-changing specifications in the aggregate producing field is outstanding. CTL has also been a great help with keeping an open line of communication between industry and state. We would highly recommend them for any Quality Control needs.”

—Jeff Sweazy, District Superintendent, Heritage Slag Products L.L.C.