SAN LUIS OBISPO COUNTY AIR POLLUTION CONTROL DISTRICT

RULE 422 - REFINERY PROCESS TURNAROUNDS
(Adopted 6/18/79)

A. A person shall not vent organic compounds to the atmosphere during the depressurization or the vessel purging steps of a refinery process turnaround.

B. Compliance with this Rule shall be accomplished by venting all uncondensed organic gases to a fuel gas system or to a flare, or by other methods which the Air Pollution Control Officer has determined will prevent said gases from being emitted to the atmosphere.

C. DEFINITIONS

1. For the purpose of this Rule "Process Turnaround" means the operation of unit (i.e. reactors, fractionators, etc.) shutdown.
2. For the purpose of this Rule "Organic Compound" means any compound of carbon excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides, carbonates, and methane.