This chapter shall apply to all hazardous materials, including those materials regulated elsewhere in this code, except that when specific requirements are provided in other chapters, those specific requirements shall apply in accordance with the applicable chapter. Where a material has multiple hazards, all hazards shall be addressed.
- In retail or wholesale sales occupancies, the quantities of medicines, foodstuffs, consumer or industrial products and cosmetics containing not more than 50 percent by volume of water-miscible liquids and with the remainder of the solutions not being flammable shall not be limited, provided such materials are packaged in individual containers not exceeding 1.3 gallons (5 L).
- Quantities of alcoholic beverages in retail or wholesale sales occupancies shall not be limited providing the liquids are packaged in individual containers not exceeding 1.3 gallons (5 L).
- Application and release of pesticide and agricultural products and materials intended for use in weed abatement, erosion control, soil amendment or similar applications when applied in accordance with the manufacturers' instructions and label directions.
- The off-site transportation of hazardous materials when in accordance with Department of Transportation (DOTn) regulations.
- Building materials not otherwise regulated by this code.
- Refrigeration systems (see Section 606 ).
- Stationary storage battery systems regulated by Section 608.
- The display, storage, sale or use of fireworks and explosives in accordance with Chapter 56.
- Corrosives utilized in personal and household products in the manufacturers' original consumer packaging in Group M occupancies.
- The storage of distilled spirits and wines in wooden barrels and casks.
- The use of wall-mounted dispensers containing alcohol-based hand rubs classified as Class I or II liquids when in accordance with Section 5705.5.
- Explosives and blasting agents.
- Combustible liquids.
- Flammable solids, liquids and gases.
- Organic peroxide solids or liquids.
- Oxidizer, solids or liquids.
- Oxidizing gases.
- Pyrophoric solids, liquids or gases.
- Unstable (reactive) solids, liquids or gases.
- Water-reactive materials solids or liquids.
- Cryogenic fluids.
- Highly toxic and toxic materials.
- Corrosive materials.
- Provide safeguards to minimize the risk of unwanted releases, fires or explosions involving hazardous materials.
- Provide safeguards to minimize the consequences of an unsafe condition involving hazardous materials during normal operations and in the event of an abnormal condition.
When required by the fire code official, permittees shall apply for approval to permanently close a storage, use or handling facility. Such application shall be submitted at least 30 days prior to the termination of the storage, use or handling of hazardous materials. The fire code official is authorized to require that the application be accompanied by an approved facility closure plan in accordance with Section 5001.6.3.
- Access to each storage and use area.
- Location of emergency equipment.
- Location where liaison will meet emergency responders.
- Facility evacuation meeting point locations.
- The general purpose of other areas within the building.
- Location of all above-ground and underground tanks and their appurtenances including, but not limited to, sumps, vaults, below-grade treatment systems and piping.
- The hazard classes in each area.
- Locations of all control areas and Group H occupancies.
- Emergency exits.
- Product name.
- Component.
- Chemical Abstract Service (CAS) number.
- Location where stored or used.
- Container size.
- Hazard classification.
- Amount in storage.
- Amount in use-closed systems.
- Amount in use-open systems.
- BOILING POINT.
- CEILING LIMIT.
- CHEMICAL.
- CHEMICAL NAME.
- CLOSED CONTAINER.
- CONTAINER.
- CONTROL AREA.
- CYLINDER.
- DAY BOX.
- DEFLAGRATION.
- DESIGN PRESSURE.
- DETACHED BUILDING.
- DISPENSING.
- EXCESS FLOW CONTROL.
- EXHAUSTED ENCLOSURE.
- EXPLOSION.
- FLAMMABLE VAPORS OR FUMES.
- GAS CABINET.
- GAS ROOM.
- HANDLING.
- HAZARDOUS MATERIALS.
- HEALTH HAZARD.
- IMMEDIATELY DANGEROUS TO LIFE AND HEALTH (IDLH).
- INCOMPATIBLE MATERIALS.
- LIQUID.
- LOWER EXPLOSIVE LIMIT (LEL).
- LOWER FLAMMABLE LIMIT (LFL).
- MATERIAL SAFETY DATA SHEET (MSDS).
- MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA.
- NORMAL TEMPERATURE AND PRESSURE (NTP).
- OUTDOOR CONTROL AREA.
- PERMISSIBLE EXPOSURE LIMIT (PEL).
- PESTICIDE.
- PHYSICAL HAZARD.
- PRESSURE VESSEL.
- SAFETY CAN.
- SECONDARY CONTAINMENT.
- SEGREGATED.
- SOLID.
- STORAGE, HAZARDOUS MATERIALS.
- SYSTEM.
- TANK, ATMOSPHERIC.
- TANK, PORTABLE.
- TANK, STATIONARY.
- TANK VEHICLE.
- UNAUTHORIZED DISCHARGE.
- USE (MATERIAL).
- VAPOR PRESSURE.
The maximum allowable quantity per control area shall be as specified in Tables 5003.1.1(1) through 5003.1.1(4).
For retail and wholesale storage and display in Group M occupancies and Group S storage, see Section 5003.11.
MATERIAL | CLASS | GROUP WHEN THE MAXIMUM ALLOWABLE QUANTITY IS EXCEEDED |
STORAGEb | USE-CLOSED SYSTEMSb | USE-OPEN SYSTEMSb | |||||
Solid pounds (cubic feet) |
Liquid gallons (pounds) |
Gas cubic feet at NTP |
Solid pounds (cubic feet) |
Liquid gallons (pounds) |
Gas cubic feet at NTP |
Solid pounds (cubic feet) |
Liquid gallons (pounds) |
|||
Combustible dust |
Not Applicable |
H-2 | See Note q | Not Applicable |
Not Applicable |
See Note q | Not Applicable |
Not Applicable |
See Note q | Not Applicable |
Combustible fiber |
Loose Baledo | H-3 | (100) | Not Applicable |
Not Applicable |
(100) | Not Applicable |
Not Applicable |
(20) | Not Applicable |
(1,000) | (1,000) | (200) | ||||||||
Combustible liquidc, i |
II | H-2 or H-3 | Not Applicable |
120d,e | Not Applicable |
Not Applicable |
120d | Not Applicable |
Not Applicable |
30d |
IIIA | H-2 or H-3 | 330d, e | 330d | 80d | ||||||
IIIB | Not Applicable | 13,200e, f | 13,200f | 3,300f | ||||||
Cryogenic Flammable |
Not Applicable |
H-2 | Not Applicable |
45d | Not Applicable |
Not Applicable |
45d | Not Applicable |
Not Applicable |
10d |
Consumer fireworks |
1.4G | H-3 | 125d, e, l | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
Cryogenic Oxidizing |
Not Applicable | H-3 | Not Applicable | 45d | Not Applicable | Not Applicable | 45d | Not Applicable | Not Applicable | 10d |
Explosives | Division 1.1 | H-1 | 1e, g | (1)e, g | Not Applicable |
0.25g | (0.25)g | Not Applicable |
0.25g | (0.25)g |
Division 1.2 | H-1 | 1e, g | (1)e, g | 0.25g | (0.25)g | 0.25g | (0.25)g | |||
Division 1.3 | H-1 or H-2 | 5e, g | (5)e, g | 1g | (1)g | 1g | (1)g | |||
Division 1.4 | H-3 | 50e, g | (50)e, g | 50g | (50)g | Not Applicable | Not Applicable | |||
Division 1.4G | H-3 | 125d, e, l | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | |||
Division 1.5 | H-1 | 1e, g | (1)e,g | 0.25g | (0.25)g | 0.25g | (0.25)g | |||
Division 1.6 | H-1 | 1e, g | Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Applicable | |||
Flammable gas |
Gaseous | H-2 | Not Applicable | Not Applicable | 1,000d, e | Not Applicable | Not Applicable | 1,000d, e | Not Applicable | Not Applicable |
Liquefied | (150)d, e | Not Applicable | (150)d, e | Not Applicable | ||||||
Flammable liquidc |
IA | H-2 or H-3 | Not Applicable | 30d, e | Not Applicable | Not Applicable | 30d | Not Applicable | Not Applicable | 10d |
IB and IC | 120d, e | 120d | 30d | |||||||
Flammable liquid, combination (IA, IB, IC) |
Not Applicable | H-2 or H-3 | Not Applicable | 120d, e, h | Not Applicable | Not Applicable | 120d, h | Not Applicable | Not Applicable | 30d, h |
Flammable solid |
Not Applicable |
H-3 | 125d, e | Not Applicable | Not Applicable | 125d | Not Applicable | Not Applicable | 25d | Not Applicable |
Inert Gas | Gaseous | Not Applicable | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable |
Liquefied | Not Applicable | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable | |
Cryogenic Inert |
Not Applicable | Not Applicable | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable |
Organic peroxide | UD | H-1 | 1e, g | (1)e, g | Not Applicable | 0.25g | (0.25)g | Not Applicable | 0.25g | (0.25)g |
I | H-2 | 5d, e | (5)d, e | 1d | (1)d | 1d | (1)d | |||
II | H-3 | 50d, e | (50)d, e | 50d | (50)d | 10d | (10)d | |||
III | H-3 | 125d, e | (125)d, e | 125d | (125)d | 25d | (25)d | |||
IV | Not Applicable | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | |||
V | Not Applicable | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | |||
Oxidizer | 4 | H-1 | 1g | (1)e, g | Not Applicable | 0.25g | (0.25)g | Not Applicable |
0.25g | (0.25)g |
3k | H-2 or H-3 | 10d, e | (10)d, e | 2d | (2)d | 2d | (2)d | |||
2 | H-3 | 250d, e | (250)d, e | 250d | (250)d | 50d | (50)d | |||
1 | Not Applicable | 4,000e,f | (4,000)e,f | 4,000f | (4,000)f | 1,000f | (1,000)f | |||
Oxidizing gas | Gaseous | H-3 | Not Applicable | Not Applicable | 1,500d, e | Not Applicable | Not Applicable | 1,500d, e | Not Applicable | Not Applicable |
Liquefied | (150)d, e |
Not Applicable |
(150)d, e |
Not Applicable |
||||||
Pyrophoric | Not Applicable |
H-2 | 4e, g | (4)e, g | 50e, g | 1g | (1)g | 10e, g | 0 | 0 |
Unstable (reactive) | 4 | H-1 | 1e, g | (1)e, g | 10e, g | 0.25g | (0.25)g | 2e, g | 0.25g | (0.25)g |
3 | H-1 or H-2 | 5d, e | (5)d, e | 50d, e | 1d | (1)d | 10d, e | 1d | (1)d | |
2 | H-3 | 50d, e | (50)d, e | 250d, e | 50d | (50)d | 250d, e | 10d | (10)d | |
1 | Not Applicable | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | |
Water reactive | 3 | H-2 | 5d,e | (5)d, e | Not Applicable |
5d | (5)d | Not Applicable |
1d | (1)d |
2 | H-3 | 50d, e | (50)d, e | 50d | (50)d | 10d | (10)d | |||
1 | Not Applicable | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited |
- For use of control areas, see Section 5003.8.3.
- The aggregate quantity in use and storage shall not exceed the quantity listed for storage.
- The quantities of alcoholic beverages in retail and wholesale sales occupancies shall not be limited providing the liquids are packaged in individual containers not exceeding 1.3 gallons. In retail and wholesale sales occupancies, the quantities of medicines, foodstuffs, consumer or industrial products, and cosmetics containing not more than 50 percent by volume of water-miscible liquids with the remainder of the solutions not being flammable shall not be limited, provided that such materials are packaged in individual containers not exceeding 1.3 gallons.
- Maximum allowable quantities shall be increased 100 percent in buildings equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1. Where Note e also applies, the increase for both notes shall be applied accumulatively.
- Maximum allowable quantities shall be increased 100 percent when stored in approved storage cabinets, day boxes, gas cabinets, exhausted enclosures, or listed safety cans. Listed safety cans shall be in accordance with Section 5003.9.10. Where Note d also applies, the increase for both notes shall be applied accumulatively.
- Quantities shall not be limited in a building equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1.
- Allowed only in buildings equipped throughout with an approved automatic sprinkler system.
- Containing not more than the maximum allowable quantity per control area of Class IA, Class IB or Class IC flammable liquids.
- The maximum allowable quantity shall not apply to fuel oil storage complying with Section 603.3.2.
- Quantities in parenthesis indicate quantity units in parenthesis at the head of each column.
- A maximum quantity of 200 pounds of solid or 20 gallons of liquid Class 3 oxidizers is allowed when such materials are necessary for maintenance purposes, operation or sanitation of equipment when the storage containers and the manner of storage are approved.
- Net weight of pyrotechnic composition of the fireworks. Where the net weight of the pyrotechnic composition of the fireworks is not known, 25 percent of the gross weight of the fireworks including packaging shall be used.
- For gallons of liquids, divide the amount in pounds by 10 in accordance with Section 5003.1.2.
- For storage and display quantities in Group M and storage quantities in Group S occupancies complying with Section 5003.11, see Table 5003.11.1.
- Densely-packed baled cotton that complies with the packing requirements of ISO 8115 shall not be included in this material class.
- The following shall not be included in determining the maximum allowable quantities:
- Liquid or gaseous fuel in fuel tanks on vehicles.
- Liquid or gaseous fuel in fuel tanks on motorized equipment operated in accordance with this code.
- Gaseous fuels in piping systems and fixed appliances regulated by the International Fuel Gas Code.
- Liquid fuels in piping systems and fixed appliances, regulated by the International Mechanical Code.
- Where manufactured, generated or used in such a manner that the concentration and conditions create a fire or explosion hazard based on information prepared in accordance with Section 104.7.2.
MATERIAL | STORAGEd | USE-CLOSED SYSTEMSd | USE-OPEN SYSTEMSd | |||||
Solid poundse, f | Liquid gallons (pounds)e, f |
Gas cubic feet at NTP (pounds)e |
Solid poundse | Liquid gallons (pounds)e |
Gas cubic feet at NTP (pounds)e |
Solid poundse | Liquid gallons (pounds)e |
|
Corrosives | 5,000 | 500 | Gaseous 810f Liquefied (150) |
5,000 | 500 | Gaseous 810f Liquefied (150) |
1,000 | 100 |
Highly Toxics | 10 | (10) | Gaseous 20g Liquefied (4)g |
10 | (10) | Gaseous 20g Liquified (4)g |
3 | (3) |
Toxics | 500 | (500) | Gaseous 810f Liquefied (150)f |
500 | (500) | Gaseous 810f Liquefied (150)f |
125 | (125) |
- For use of control areas, see Section 5003.8.3.
- In retail and wholesale sales occupancies, the quantities of medicines, foodstuffs, consumer or industrial products, and cosmetics, containing not more than 50 percent by volume of water-miscible liquids and with the remainder of the solutions not being flammable, shall not be limited, provided that such materials are packaged in individual containers not exceeding 1.3 gallons.
- For storage and display quantities in Group M and storage quantities in Group S occupancies complying with Section 5003.11, see Table 5003.11.1.
- The aggregate quantity in use and storage shall not exceed the quantity listed for storage.
- Maximum allowable quantities shall be increased 100 percent in buildings equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1. Where Note f also applies, the increase for both notes shall be applied accumulatively.
- Maximum allowable quantities shall be increased 100 percent when stored in approved storage cabinets, gas cabinets or exhausted enclosures. Where Note e also applies, the increase for both notes shall be applied accumulatively.
- Allowed only when stored in approved exhausted gas cabinets or exhausted enclosures.
- Quantities in parentheses indicate quantity units in parentheses at the head of each column.
- For gallons of liquids, divide the amount in pounds by 10 in accordance with Section 5003.1.2.
MATERIAL | CLASS | STORAGEb | USE-CLOSED SYSTEMSb | USE-OPEN SYSTEMSb | |||||
Solid pounds (cubic feet) |
Liquid gallons (pounds)d |
Gas cubic feet at NTP | Solid pounds (cubic feet) |
Liquid gallons (pounds)d |
Gas cubic feet at NTP | Solid pounds (cubic feet) |
Liquid gallons (pounds)d |
||
Flammable gas | Gaseous | Not Applicable | Not Applicable | 3,000 | Not Applicable | Not Applicable | 1,500 | Not Applicable | Not Applicable |
Liquefied | (300) | Not Applicable | (150) | Not Applicable | |||||
Flammable solid | Not Applicable | 500 | Not Applicable | Not Applicable | 250 | Not Applicable | Not Applicable | 50 | Not Applicable |
Inert Gas | Gaseous | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable |
Liquefied | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable | |
Cryogenic inert | Not Applicable | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable | Not Limited | Not Applicable | Not Applicable |
Organic peroxide | Unclassified Detonable | 1 | (1) | Not Applicable | 0.25 | (0.25) | Not Applicable | 0.25 | (0.25) |
Organic peroxide | I | 20 | (20) | Not Applicable |
10 | (10) | Not Applicable |
2 | (2) |
II | 200 | (200) | 100 | (100) | 20 | (20) | |||
III | 500 | (500) | 250 | (250) | 50 | (50) | |||
IV | 1,000 | (1,000) | 500 | (500) | 100 | (100) | |||
V | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | |||
Oxidizer | 4 | 2 | (2) | Not Applicable |
1 | (1) | Not Applicable |
0.25 | (0.25) |
3 | 10 | (40) | 20 | (20) | 4 | (4) | |||
2 | 1,000 | (1,000) | 500 | (500) | 100 | (100) | |||
1 | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | |||
Oxidizing gas | Gaseous | Not Applicable |
Not Applicable | 6,000 | Not Applicable |
Not Applicable | 1,500 | Not Applicable |
Not Applicable |
Liquefied | (600) | Not Applicable | (300) | Not Applicable | |||||
Pyrophoric materials |
Not Applicable |
8 | (8) | 100 | 4 | (4) | 10 | 0 | 0 |
Unstable (reactive) |
4 | 2 | (2) | 20 | 1 | (1) | 2 | 0.25 | |
3 | 20 | (20) | 200 | 10 | (10) | 10 | 1 | 1 | |
2 | 200 | (200) | 1,000 | 100 | (100) | 250 | 10 | 10 | |
1 | Not Limited | Not Limited | 1,500 | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | |
Water reactive | 3 | 20 | (20) | Not Applicable |
10 | (10) | Not Applicable |
1 | (1) |
2 | 200 | (200) | 100 | (100) | 10 | (10) | |||
1 | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited | Not Limited |
- For gallons of liquids, divide the amount in pounds by 10 in accordance with Section 5003.1.2.
- The aggregate quantities in storage and use shall not exceed the quantity listed for storage.
- The aggregate quantity of nonflammable solid and nonflammable or noncombustible liquid hazardous materials allowed in outdoor storage per single property under the same ownership or control used for retail or wholesale sales is allowed to exceed the maximum allowable quantity per control area when such storage is in accordance with Section 5003.11.
- Quantities in parentheses indicate quantity units in parentheses at the head of each column.
MATERIAL | STORAGE | USE-CLOSED SYSTEMS | USE-OPEN SYSTEMS | |||||
Solid pounds | Liquid gallons (pounds) | Gas cubic feet at NTP (pounds) |
Solid pounds | Liquid gallons (pounds) | Gas cubic feet at NTP (pounds) |
Solid pounds | Liquid gallons (pounds) | |
Corrosives | 20,000 | 2,000 | Gaseous 1,620 Liquefied (300) |
10,000 | 1,000 | Gaseous 810 Liquefied (150) |
1,000 | 100 |
Highly toxics | 20 | (20) | Gaseous 40d Liquefied (8)d |
10 | (10) | Gaseous 20d Liquefied (4)d |
3 | (3) |
Toxics | 1,000 | (1,000)e | Gaseous 1,620 Liquefied (300) |
500 | 50e | Gaseous 810 Liquefied (150) |
125 | (125)e |
- For gallons of liquids, divide the amount in pounds by 10 in accordance with Section 5003.1.2.
- The aggregate quantities in storage and use shall not exceed the quantity listed for storage.
- The aggregate quantity of nonflammable solid and nonflammable or noncombustible liquid hazardous materials allowed in outdoor storage per single property under the same ownership or control used for retail or wholesale sales is allowed to exceed the maximum allowable quantity per control area when such storage is in accordance with Section 5003.11.
- Allowed only when used in approved exhausted gas cabinets, exhausted enclosures or under fume hoods.
- The maximum allowable quantity per control area for toxic liquids with vapor pressures in excess of 1 psia at 77°F shall be the maximum allowable quantity per control area listed for highly toxic liquids.
- Quantities in parentheses indicate quantity units in parentheses at the head of each column.
- Piping, tubing, valves, fittings and related components shall be designed and fabricated from materials that are compatible with the material to be contained and shall be of adequate strength and durability to withstand the pressure, structural and seismic stress and exposure to which they are subject.
- Piping and tubing shall be identified in accordance with ASME A13.1 to indicate the material conveyed.
- Readily accessible manual valves or automatic remotely activated fail-safe emergency shutoff valves shall be installed on supply piping and tubing at the following locations:
- Manual emergency shutoff valves and controls for remotely activated emergency shutoff valves shall be identified and the location shall be clearly visible, accessible and indicated by means of a sign.
- Backflow prevention or check valves shall be provided when the backflow of hazardous materials could create a hazardous condition or cause the unauthorized discharge of hazardous materials.
- Where gases or liquids having a hazard ranking of:
- Health Class 3 or 4
- Flammability Class 4
- Instability Class 3 or 4
- Piping for inlet connections designed to prevent backflow.
- Piping for pressure relief devices.
- Piping and tubing utilized for the transmission of highly toxic, toxic or highly volatile corrosive liquids and gases shall have welded, threaded or flanged connections throughout except for connections located within a ventilated enclosure if the material is a gas, or an approved method of drainage or containment is provided for connections if the material is a liquid.
- Piping and tubing shall not be located within corridors, within any portion of a means of egress required to be enclosed in fire-resistance-rated construction or in concealed spaces in areas not classified as Group H occupancies.
- Periodic testing shall not be required where approved written documentation is provided stating that testing will damage the equipment, device or system and the equipment, device or system is maintained as specified by the manufacturer.
- Periodic testing shall not be required for equipment, devices and systems that fail in a fail-safe manner.
- Periodic testing shall not be required for equipment, devices and systems that self-diagnose and report trouble. Records of the self-diagnosis and trouble reporting shall be made available to the fire code official.
- Periodic testing shall not be required if system activation occurs during the required test cycle for the components activated during the test cycle.
- Approved maintenance in accordance with Section 5003.2.6 that is performed not less than annually or in accordance with an approved schedule shall be allowed to meet the testing requirements set forth in Sections 5003.2.9.1 and 5003.2.9.2.
- Gas detection systems, alarms and automatic emergency shutoff valves required by Section 6004.2.2.10 for highly toxic and toxic gases.
- Limit control systems for liquid level, temperature and pressure required by Sections 5003.2.7, 5004.8 and 5005.1.4.
- Emergency alarm systems and supervision required by Sections 5004.9 and 5005.4.4.
- Monitoring and supervisory systems required by Sections 5004.10 and 5005.1.6.
- Manually activated shutdown controls required by Section 6403.1.1.1 for compressed gas systems conveying pyrophoric gases.
- Not less than annually;
- In accordance with the approved manufacturer's requirements;
- In accordance with approved recognized industry standards; or
- In accordance with an approved schedule.
- The release or emission of hazardous materials is allowed when in compliance with federal, state or local governmental agencies, regulations or permits.
- The release of pesticides is allowed when used in accordance with registered label directions.
- The release of fertilizer and soil amendments is allowed when used in accordance with manufacturer's specifications.
- In rooms or areas where hazardous materials are stored or dispensed or used in open systems in amounts requiring a permit in accordance with Section 5001.5.
- Within 25 feet (7620 mm) of outdoor storage, dispensing or open use areas.
- Facilities or areas within facilities that have been designated as totally "no smoking" shall have "No Smoking" signs placed at all entrances to the facility or area. Designated areas within such facilities where smoking is permitted either permanently or temporarily, shall be identified with signs designating that smoking is permitted in these areas only.
- In rooms or areas where flammable or combustible hazardous materials are stored, dispensed or used.
A DETACHED BUILDING IS REQUIRED WHEN THE QUANTITY OF MATERIAL EXCEEDS THAT LISTED HEREIN | |||
Material | Class | Solids and liquids (tons)a, b | Gases (cubic feet)a, b |
Explosives | Division 1.1 | Maximum Allowable Quantity | Not Applicable |
Division 1.2 | Maximum Allowable Quantity | ||
Division 1.3 | Maximum Allowable Quantity | ||
Division 1.4 | Maximum Allowable Quantity | ||
Division 1.4c | 1 | ||
Division 1.5 | Maximum Allowable Quantity | ||
Division 1.6 | Maximum Allowable Quantity | ||
Oxidizers | Class 4 | Maximum Allowable Quantity | Maximum Allowable Quantity |
Unstable (reactives) detonable | Class 3 or 4 | Maximum Allowable Quantity | Maximum Allowable Quantity |
Oxidizer, liquids and solids | Class 3 Class 2 |
1,200 2,000 |
Not Applicable |
Organic peroxides | Detonable | Maximum Allowable Quantity | Not Applicable |
Class I | Maximum Allowable Quantity | ||
Class II | 25 | ||
Class III | 50 | ||
Unstable (reactives) nondetonable | Class 3 | 1 | 2,000 |
Class 2 | 25 | 10,000 | |
Water reactives | Class 3 | 1 | Not Applicable |
Class 2 | 25 | ||
Pyrophoric gases | Not Applicable | Not Applicable | 2,000 |
- For materials which are detonable, the distance to other buildings or lot lines shall be as specified in the International Building Code. For materials classified as explosives, the required separation distances shall be as specified in Chapter 56.
- "Maximum Allowable Quantity" means the maximum allowable quantity per control area set forth in Table 5003.1.1(1).
- Limited to Division 1.4 materials and articles, including articles packaged for shipment, that are not regulated as an explosive under Bureau of Alcohol, Tobacco, Firearms and Explosives regulations, or unpackaged articles used in process operations that do not propagate a detonation or deflagration between articles, providing the net explosive weight of individual articles does not exceed 1 pound.
FLOOR LEVEL | PERCENTAGE OF THE MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREAa | NUMBER OF CONTROL AREAS PER FLOOR | FIRE-RESISTANCE RATING FOR FIRE BARRIERS IN HOURSb | |
Above grade plane | Higher than 9 | 5 | 1 | 2 |
7-9 | 5 | 2 | 2 | |
6 | 12.5 | 2 | 2 | |
5 | 12.5 | 2 | 2 | |
4 | 12.5 | 2 | 2 | |
3 | 50 | 2 | 1 | |
2 | 75 | 3 | 1 | |
1 | 100 | 4 | 1 | |
Below grade plane | 1 | 75 | 3 | 1 |
2 | 50 | 2 | 1 | |
Lower than 2 | Not Allowed | Not Allowed | Not Allowed |
- Percentages shall be of the maximum allowable quantity per control area shown in Tables 5003.1.1(1) and 5003.1.1(2), with all increases allowed in the footnotes to those tables.
- Separation shall include fire barriers and horizontal assemblies as necessary to provide separation from other portions of the building.
- The building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1; and
- The building is three stories or less above grade plane.
- Constructed of not less than 0.097-inch (2.5 mm) (No. 12 gage) steel.
- Be provided with self-closing limited access ports or noncombustible windows to give access to equipment controls.
- Be provided with self-closing doors.
- Gas cabinet interiors shall be treated, coated or constructed of materials that are compatible with the hazardous materials stored. Such treatment, coating or construction shall include the entire interior of the cabinet.
- Cabinets shall be of steel having a thickness of not less than 0.0478 inch (1.2 mm) (No. 18 gage). The cabinet, including the door, shall be double walled with a 11/2-inch (38 mm) airspace between the walls. Joints shall be riveted or welded and shall be tight fitting. Doors shall be well fitted, self-closing and equipped with a self-latching device.
- The bottoms of cabinets utilized for the storage of liquids shall be liquid tight to a minimum height of 2 inches (51 mm).
Electrical equipment and devices within cabinets used for the storage of hazardous gases or liquids shall be in accordance with NFPA 70.
HAZARDOUS—KEEP FIRE AWAY.
- Segregating incompatible materials in storage by a distance of not less than 20 feet (6096 mm).
- Isolating incompatible materials in storage by a noncombustible partition extending not less than 18 inches (457 mm) above and to the sides of the stored material.
- Storing liquid and solid materials in hazardous material storage cabinets.
- Storing compressed gases in gas cabinets or exhausted enclosures in accordance with Sections 5003.8.5 and 5003.8.6. Materials that are incompatible shall not be stored within the same cabinet or exhausted enclosure.
- Storage in hazardous material storage cabinets or laboratory furniture specifically designed for such use.
- Storage of hazardous materials in amounts not requiring a permit in accordance with Section 5001.5.
- Two hazardous material liquid containers, which are hand carried in acceptable safety carriers.
- Not more than four drums not exceeding 55 gallons (208 L) each, which are transported by suitable drum trucks.
- Containers and cylinders of compressed gases, which are transported by approved hand trucks, and containers and cylinders not exceeding 25 pounds (11 kg), which are hand carried.
- Solid hazardous materials not exceeding 100 pounds (45 kg), which are transported by approved hand trucks, and a single container not exceeding 50 pounds (23 kg), which is hand carried.
CONDITION | MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA | ||
Materiala | Class | Solids pounds | Liquids gallons |
A. HEALTH-HAZARD MATERIALS—NONFLAMMABLE AND NONCOMBUSTIBLE SOLIDS AND LIQUIDS | |||
1. Corrosivesb, c | Not Applicable | 9,750 | 975 |
2. Highly Toxics | Not Applicable | 20b, c | 2b, c |
3. Toxicsb, c | Not Applicable | 1,000 | 100 |
B. PHYSICAL-HAZARD MATERIALS—NONFLAMMABLE AND NONCOMBUSTIBLE SOLIDS AND LIQUIDS | |||
1. Oxidizersb, c | 4 | Not Allowed | Not Allowed |
3 | 1,150g | 115 | |
2 | 2,250h | 225 | |
1 | 18,000i, j | 1,800i, j | |
2. Unstable (Reactives)b, c | 4 | Not Allowed | Not Allowed |
3 | 550 | 55 | |
2 | 1,150 | 115 | |
1 | Not Limited | Not Limited | |
3. Water Reactives | 3b, c | 550 | 55 |
2b, c | 1,150 | 115 | |
1 | Not Limited | Not Limited |
- Hazard categories are as specified in Section 5001.2.2.
- Maximum allowable quantities shall be increased 100 percent in buildings equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1. When Note c also applies, the increase for both notes shall be applied accumulatively.
- Maximum allowable quantities shall be increased 100 percent when stored in approved storage cabinets in accordance with Section 5003.8. When Note b also applies, the increase for both notes shall be applied accumulatively.
- See Table 5003.8.3.2 for design and number of control areas.
- Maximum allowable quantities for other hazardous material categories shall be in accordance with Section 5003.1.
- Maximum allowable quantities shall be increased 100 percent in outdoor control areas.
- Maximum allowable quantities are permitted to be increased to 2,250 pounds when individual packages are in the original sealed containers from the manufacturer or packager and do not exceed 10 pounds each.
- Maximum allowable quantities are permitted to be increased to 4,500 pounds when individual packages are in the original sealed containers from the manufacturer or packager and do not exceed 10 pounds each.
- Quantities are unlimited where protected by an automatic sprinkler system.
- Quantities are unlimited in an outdoor control area.
- Outdoor control areas shall be kept free from weeds, debris and common combustible materials not necessary to the storage. The area surrounding an outdoor control area shall be kept clear of such materials for a minimum of 15 feet (4572 mm).
- Outdoor control areas shall be located not closer than 20 feet (6096 mm) from a lot line that can be built upon, public street, public alley or public way.
- For solid and liquid hazardous materials, a 2-hour fire-resistance-rated wall without openings extending not less than 30 inches (762 mm) above and to the sides of the storage area shall be allowed in lieu of such distance.
- For compressed gas hazardous materials, unless otherwise specified, the minimum required distances shall not apply when fire barriers without openings or penetrations having a minimum fire-resistance rating of 2 hours interrupt the line of sight between the storage and the exposure. The configuration of the fire barrier shall be designed to allow natural ventilation to prevent the accumulation of hazardous gas concentrations.
- Where a property exceeds 10,000 square feet (929 m2), a group of two outdoor control areas is allowed when approved and when each control area is separated by a minimum distance of 50 feet (15 240 mm).
- Where a property exceeds 35,000 square feet (3252 m2), additional groups of outdoor control areas are allowed when approved and when each group is separated by a minimum distance of 300 feet (91 440 mm).
- Liquid-tight sloped or recessed floors in indoor locations or similar areas in outdoor locations.
- Liquid-tight floors in indoor locations or similar areas in outdoor locations provided with liquid-tight raised or recessed sills or dikes.
- Sumps and collection systems.
- Other approved engineered systems.
- Liquids: Capacity of an individual vessel exceeds 55 gallons (208 L) or the aggregate capacity of multiple vessels exceeds 1,000 gallons (3785 L); and
- Solids: Capacity of an individual vessel exceeds 550 pounds (250 kg) or the aggregate capacity of multiple vessels exceeds 10,000 pounds (4540 kg).
MATERIAL | INDOOR STORAGE | OUTDOOR STORAGE | |||
Solids | Liquids | Solids | Liquids | ||
1. Physical-hazard materials | |||||
Combustible liquids | Class II | Not Applicable |
See Chapter 57 | Not Applicable |
See Chapter 57 |
Class IIIA | See Chapter 57 | See Chapter 57 | |||
Class IIIB | See Chapter 57 | See Chapter 57 | |||
Cryogenic fluids | See Chapter 55 | See Chapter 55 | |||
Explosives | See Chapter 56 | See Chapter 56 | |||
Flammable liquids | Class IA | Not Applicable |
See Chapter 57 | Not Applicable |
See Chapter 57 |
Class IB | See Chapter 57 | See Chapter 57 | |||
Class IC | See Chapter 57 | See Chapter 57 | |||
Flammable solids | Not Required | Not Applicable | Not Required | Not Applicable | |
Organic peroxides | Unclassified Detonable |
Required | Required | Not Required | Not Required |
Class I | |||||
Class II | |||||
Class III | |||||
Class IV | |||||
Class V | Not Required | Not Required | Not Required | Not Required | |
Oxidizers | Class 4 | Required | Required | Not Required | Not Required |
Class 3 | |||||
Class 2 | |||||
Class 1 | Not Required | Not Required | Not Required | Not Required | |
Pyrophorics | Not Required | Required | Not Required | Required | |
Unstable (reactives) | Class 4 | Required | Required | Required | Required |
Class 3 | |||||
Class 2 | |||||
Class 1 | Not Required | Not Required | Not Required | Not Required | |
Water reactives | Class 3 | Required | Required | Required | Required |
Class 2 | |||||
Class 1 | Not Required | Not Required | Not Required | Not Required | |
2. Health-hazard materials | |||||
Corrosives | Not Required | Required | Not Required | Required | |
Highly toxics | Required | Required | Required | Required | |
Toxics |
- Liquid-tight sloped or recessed floors in indoor locations or similar areas in outdoor locations.
- Liquid-tight floors in indoor locations or similar areas in outdoor locations provided with liquid-tight raised or recessed sills or dikes.
- Sumps and collection systems.
- Drainage systems leading to an approved location.
- Other approved engineered systems.
- The slope of floors to drains in indoor locations, or similar areas in outdoor locations shall not be less than 1 percent.
- Drains from indoor storage areas shall be sized to carry the volume of the fire protection water as determined by the design density discharged from the automatic fire-extinguishing system over the minimum required system design area or area of the room or area in which the storage is located, whichever is smaller.
- Drains from outdoor storage areas shall be sized to carry the volume of the fire flow and the volume of a 24-hour rainfall as determined by a 25-year storm.
- Materials of construction for drainage systems shall be compatible with the materials stored.
- Incompatible materials used in open systems shall be separated from each other in the drainage system.
- Drains shall terminate in an approved location away from buildings, valves, means of egress, fire access roadways, adjoining property and storm drains.
- A liquid-tight sump accessible for visual inspection shall be provided.
- The sump shall be designed to contain not less than 66 gallons (250 L).
- Exposed surfaces shall be compatible with material stored.
- Containment pallets shall be protected to prevent collection of rainwater within the sump.
- Installation shall be in accordance with the International Mechanical Code.
- Mechanical ventilation shall be at a rate of not less than 1 cubic foot per minute per square foot [0.00508 m3/(s • m2)] of floor area over the storage area.
- Systems shall operate continuously unless alternative designs are approved.
- A manual shutoff control shall be provided outside of the room in a position adjacent to the access door to the room or in an approved location. The switch shall be a break-glass or other approved type and shall be labeled: VENTILATION SYSTEM EMERGENCY SHUTOFF.
- Exhaust ventilation shall be designed to consider the density of the potential fumes or vapors released. For fumes or vapors that are heavier than air, exhaust shall be taken from a point within 12 inches (305 mm) of the floor. For fumes or vapors that are lighter than air, exhaust shall be taken from a point within 12 inches (305 mm) of the highest point of the room.
- The location of both the exhaust and inlet air openings shall be designed to provide air movement across all portions of the floor or room to prevent the accumulation of vapors.
- Exhaust air shall not be recirculated to occupied areas if the materials stored are capable of emitting hazardous vapors and contaminants have not been removed. Air contaminated with explosive or flammable vapors, fumes or dusts; flammable, highly toxic or toxic gases; or radioactive materials shall not be recirculated.
- Mechanical ventilation for storage of Class IB and Class IC flammable and combustible liquids in closed containers not exceeding 61/2 gallons (25 L) capacity.
- Storage areas for Class 1 and 2 oxidizers.
- Storage areas for Class II, III, IV and V organic peroxides.
- Storage areas for asphyxiant, irritant and radioactive gases.
- For storage areas for highly toxic or toxic materials, see Sections 6004.2.2.8 and 6004.3.4.2.
- Standby power for mechanical ventilation, treatment systems and temperature control systems shall not be required where an approved fail-safe engineered system is installed.
- Standby power for mechanical ventilation, treatment systems and temperature control systems shall not be required where an approved fail-safe engineered system is installed.
- Systems for highly toxic or toxic gases shall be provided with emergency power in accordance with Sections 6004.2.2.8 and 6004.3.4.2.
- From safety cans complying with UL 30.
- Through an approved closed piping system.
- From containers or tanks by an approved pump taking suction through an opening in the top of the container or tank.
- From containers or tanks by gravity through an approved self-closing or automatic-closing valve when the container or tank and dispensing operations are provided with spill control and secondary containment in accordance with Section 5004.2. Highly toxic liquids shall not be dispensed by gravity from tanks.
- Approved engineered liquid transfer systems.
- Liquids having a hazard ranking of 4 when dispensed from approved containers not exceeding 1.3 gallons (5 L).
- Liquids having a hazard ranking of 3 when dispensed from approved containers not exceeding 5.3 gallons (20 L).
- Individual vessel or system: greater than 1.3 gallons (5 L).
- Multiple vessels or systems: greater than 5.3 gallons (20 L).
MATERIAL | INDOOR LIQUIDS USE | OUTDOOR LIQUIDS USE | ||
1. Physical-hazard materials | ||||
Combustible liquids | Class II | See Chapter 57 | See Chapter 57 | |
Class IIIA | See Chapter 57 | See Chapter 57 | ||
Class IIIB | See Chapter 57 | See Chapter 57 | ||
Cryogenic fluids | See Chapter 55 | See Chapter 55 | ||
Explosives | See Chapter 56 | See Chapter 56 | ||
Flammable liquids | Class IA | See Chapter 57 | See Chapter 57 | |
Class IB | See Chapter 57 | See Chapter 57 | ||
Class IC | See Chapter 57 | See Chapter 57 | ||
Flammable solids | Not Applicable | Not Applicable | ||
Organic peroxides | Unclassified Detonable | Required | Required | |
Class I | Required | Required | ||
Class II | ||||
Class III | ||||
Class IV | ||||
Class V | Not Required | Not Required | ||
Oxidizers | Class 4 | Required | Required | |
Class 3 | ||||
Class 2 | ||||
Class 1 | ||||
Pyrophorics | Required | Required | ||
Unstable (reactives) | Class 4 | Required | Required | |
Class 3 | ||||
Class 2 | ||||
Class 1 | Not Required | Required | ||
Water reactives | Class 3 | Required | Required | |
Class 2 | ||||
Class 1 | Not Required | Required | ||
2. Health-hazard materials | ||||
Corrosives | Required | Required | ||
Highly toxics | ||||
Toxics |