“Flat coating” means a coating that is not otherwise defined in this part and that, when tested in accordance with ASTM test method D523-89, as revised in 1999, registers a gloss of less than 15 on an 85 degree gloss meter or less than 5 on a 60 degree gloss meter.

Source. #8695, eff 7-27-06, ss by #10736, eff 1-1-15 (formerly Env-A 4202.01(x)); ss by #14202, eff 2-26-25