§ 63.1411 Requirements for pressure relief devices.

Except as specified in paragraph (d) of this section, the owner or operator must comply with the requirements specified in paragraphs (a) and (b) of this section for pressure relief devices in organic HAP gas or vapor service. Except as specified in paragraph (d) of this section, the owner or operator must also comply with the requirements specified in paragraph (c) of this section for all pressure relief devices in organic HAP service.

(a) Operating requirements. Except during a pressure release event, operate each pressure relief device in organic HAP gas or vapor service with an instrument reading of less than 500 ppm above background as described in Method 21 of 40 CFR part 60, Appendix A.

(b) Pressure release requirements. For pressure relief devices in organic HAP gas or vapor service, the owner or operator must comply with either paragraph (b)(1) or (2) of this section following a pressure release, as applicable.