Morgan Hill Municipal Code Part 5 Class I Controls

Persons responsible for any facility where Class I materials are present shall comply with all of the requirements of Part 2 and Parts 5, 6, 7, and 8 of this article.

(Ord. 1494 N.S. § 2 (part), 2000)

Piping for Class I materials shall be designed and fabricated from materials compatible with the material to be contained. Piping shall be of strength and durability sufficient to withstand the pressure, structural and seismic stress and exposure to which it may be subjected, as required by the California Building Code.

Secondary containment shall be provided for piping for Class I materials. The secondary containment shall be capable of directing a sudden release into an approved discharge treatment system and shall be monitored continually with a continuous gas monitoring system approved by the fire chief or his designee. Secondary containment includes, but is not limited to, doublewalled piping. Secondary containment for piping under sub-atmospheric conditions may not be required if the piping is equipped with an alarm and cylinder fail-safe-to-close valve activated by a loss of vacuum.

(Ord. 1494 N.S. § 2 (part), 2000)

An automatic shutoff valve which is of fail-safe-to-close design shall be provided. Each of the following shall activate automatic shutoff:

A. Gas detection at PEL in occupiable areas; at one-half IDLH (or 0.05 LC 50 if no established IDLH) in unoccupiable areas;

B. Manual activation of emergency shutoff valves, from remote locations;

C. Failure of emergency power;

D. Seismic activity;

E. Failure of primary containment;

F. Activation of manual fire alarm;

G. Failure of required exhaust flow ventilation rate.

(Ord. 1494 N.S. § 2 (part), 2000)

Signals from emergency equipment shall be transmitted to an emergency control station which is continually staffed by trained personnel. Continual staffing shall not be required during periods when regulated materials have been purged from all process piping and equipment and are no longer being used or dispensed.

(Ord. 1494 N.S. § 2 (part), 2000)