Compressor stations: Gas detection.

(a)Not later than September 16, 1996, each compressor building in a compressor station must have a fixed gas detection and alarm system, unless the building is—#

(1)Constructed so that at least 50 percent of its upright side area is permanently open; or#

(2)Located in an unattended field compressor station of 1,000 horsepower (746 kW) or less.#

(b)Except when shutdown of the system is necessary for maintenance under paragraph (c) of this section, each gas detection and alarm system required by this section must—#

(1)Continuously monitor the compressor building for a concentration of gas in air of not more than 25 percent of the lower explosive limit; and#

(2)If that concentration of gas is detected, warn persons about to enter the building and persons inside the building of the danger.#

(c)Each gas detection and alarm system required by this section must be maintained to function properly. The maintenance must include performance tests.#