34 Pa. Code § 35.62 – Respiratory protectors.

(a) Use. When a sprayer working at a booth or in a room booth is exposed to deposits of sprayed material he shall be provided with, and shall wear, an approved respiratory protector.
(b) Maintenance. Respiratory protectors shall be maintained in a sanitary condition. The filtering and the absorbent or absorbent materials shall be changed as often as necessary to provide the wearer with adequate protection.
(c) Type of protector. Under approved conditions for use of respiratory protectors as specified in § 35.61 (relating to exceptions to booth requirements), various types of respiratory protectors shall be used pursuant to the following requirements:
1. (1) When health hazardous substances used in spray coating are in the particulate form, the respiratory protectors used shall be of the filter type.
2. (2) When health hazardous substances are in the form of gas or vapor the respiratory protector shall contain gas or vapor absorbents or adsorbents such as activated charcoal.
3. (3) When health hazardous substances are in the form of both particulate matter and gases or vapors, the respiratory protector shall contain both a mechanical filter and an absorbent or adsorbent.
4. (4) A positive pressure air respirator may be substituted for any of the respiratory protectors specified in paragraphs (1)—(3).