GUIDELINES FOR GRINDING POST CONSUMER ROOFING .
Guidelines for Handling PostConsumer Roofing Shingles in the Manufacture of Asphalt June 2011 Page 2 of 3 . 8. Each facility will use a North Carolina accredited asbestos inspector or a NC accredited asbestos roofing supervisor to inspect suspect postconsumer roofing shingles for the presence of asbestos before grinding.