Sec. 12-2.1. Cutting, grinding and polishing wheels

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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:
1. Wet grinding with other than sandstone wheels and wet polishing and buffing operations if enclosures are provided which prevent splash or dispersion of liquids, abrasive compounds or mists into the workroom.
2. Intricate and precision grinding discs or wheels not over one inch in diameter.
3. Grinding or polishing of articles and instruments made of gold or platinum.
4. Intermittent tool grinding operations used for shop purposes only.

                    
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