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555-8 STORAGE,USE,AND HANDLING OF COMPRESSED AND LIQUEFIED GASES IN PORTABLE CYLINDERS 3-1.3 Exhaust ventilation systems for indoor toxic gas storage shall be capable of containing, controlling, processing, or shall comply with the following,except where natural ventila- mitigating leaks from compressed gas cylinders and shall be tion prevents toxic accumulations of gases being stored. permitted to be used in lieu of gas cabinets and treatment systems. (a) Where gas cabinets are not used,mechanical ventilation shall be operated continuously at a rate of not less than 1 cfm/ft2 (0.3 m3/min•m2) of floor area of the storage area. Chapter 4 Hazard Warnings Exception No. 1: Alternate engineered systems that recognize the ; Properties of the gas being stored and approved by the authority having 4-1 Hazard Identification. Y, jurisdiction. 4-1.1 Hazard identification signs shall be placed at all en- Exception No.2: When the area is not occupied, the ventilation rate trances to locations where compressed gases are produced, shall be permitted to be reduced provided ventilation is increased in stored, used, or handled. the event concentrations exceed a predetermined set point below that 'concentration that poses a hazard to life. Exception: The authority having jurisdiction shall be permitted to (b) A manual ventilation shutoff shall be provided outside waive this requirement where consistent with safety. the room adjacent to the access door into the room or 4-1.2 Sins. Signage shall be handled in the following man- in t an-int location approved by the authority having jurisdic- ner: tion, The switch shall be labeled "Ventilation System Emergency Shutoff." (a) Signs shall not be obscured or removed. Signs shall be (c) Exhaust ventilation shall not be recirculated within a in English as a primary language or in symbols. room or building. (b) Signs prohibiting smoking or open flames within 20 ft (�1) Vet1t}latiop shall not be required to be operated when (6.1 m)shall be provided in areas where toxic,flammable, ,no toxic gas is being stored. oxidizing, or pyrophoric gases are produced, handled, 3-1.4 �Qptdoor storage of toxic gases shall be located 75 ft stored, or used. (22,m)_T9in a line of property that can be built ppon,public 4 2* Labeling Requirements. Individual compressed gas cyl- ways, places of public assembly, and buildings not associated inders shall be marked or labeled in accordance with DOT with the manufacture or use of the gases in storage. Such and OSHA requirements. storage,areas'sh�ll be secured from unauthorized access. 4-3 Label Maintenance. The labels applied by the gas manu- 3714 While,in storage and while being handled, cylinders facturer to identify the compressed or liquefied gas cylinder of toxic gases sh4ll have valve protective devices or caps and contents shall not be altered or removed by the user. gastight valve outlet caps or plugs in place. This shall apply to all cylinders whether full, partially full, or empty. Exception: Cylinders being connected for use or disconnected. Chapter 5 Emergency Plan 3-2 Health 4 Storage Requirements. User locations storing tokic gages with'a health hazard rating of 4 in accordance with 5-1 Emergency Plan Requirements. An emergency response NFPA 704 shall meet the following requirements. plan shall be prepared and updated wherever liquefied or Exception: Chlorine storage areas shall meet the requirements of compressed gases are produced,handled,stored,or used.The Section 3-3. plan shall be available for inspection by the authority having jurisdiction upon reasonable notice. The following informa- 3-2.1 Storage within buildings shall be in gas cabinets or tion shall be included in the emergency plan. (See 29 CFR exhausted enclosures having positive exhaust ventilation. 1910.120 and 1910.1200.) Exception: Other means acceptable to the authority having jurisdic- tion that( rovide an equivalent level of safety. (a) The type of emergency equipment available and its loca- tion 3-2.2 When storage is not in buildings,at least one gas cabi- net or exhausted enclosure shall be provided for the handling of leaking cylinders.The cabinet or enclosure shall be located grains for the available emergency equipment l within or adjacent to the outdoor storage area. (c). An indication that hazard identification labeling is pro- vided for each storage area 3-2.3 Gas cabinets or exhausted enclosures shall be con- I (d) Location of posted emergency response procedures netted to treatment systems. (e) Material safety data sheets (MSDSs) shall be available for 3-3* Health 3 Storage Requirements. User locations storing all gases stored on the site. toxic gases with a health hazard rating of 3 in accordance with (f) A list of responsible personnel who are designated and NFPA 70'4 shall have equipment on site that shall prevent gas trained tbe liaison personnel for the fire department. l from leaking cylinders from escaping into the building or These individuals shall aid the emergency responders in atmosphere, or shall have equipment readily available. pre-emergency planning;identify the location of flamma- 3-4* Lef*age Mitigation. At gas manufacturers'and distrib- ble, pyrophoric, oxidizing, and toxic gases; access mate- utors'facilities that handle toxic gases and have a health haz- rial safety data sheets;and shall be knowledgeable in the and rating of 4 in accordance with NFPA 704, a containment site emergency response procedures. device of other equivalent equipment shall be on site or readily (g) A list of the types and quantities of compressed and lique- available. Such containment device or equivalent equipment fled gases normally at the facility 1998'gditlon