Grinding, polishing, buffing, scratch brushing, abrasive cutting-off wheel and grinding or polishing belt strap operations generating dangerous air contaminants shall be provided with local exhaust ventilation and air cleaning devices.
Exceptions:
Exceptions:2. Intricate and precision grinding discs or wheels not over one inch in diameter.
Exceptions:3. Grinding or polishing of articles and instruments made of gold or platinum.
Exceptions:4. Intermittent tool grinding operations used for shop purposes only.
N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 12-2.1