General Requirements

5003.1 Scope

The storage, use and handling of all hazardous materials shall be in accordance with this section.

5003.1.1 Maximum allowable quantity per control area

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.

TABLE 5003.1.1(1)

MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA OF HAZARDOUS MATERIALS POSING A PHYSICAL HAZARD^{a, j, m, n, p}

MATERIAL	CLASS	GROUP WHEN THE MAXIMUM ALLOWABLE QUANTITY IS EXCEEDED	STORAGE^b			USE-CLOSED SYSTEMS^b			USE-OPEN SYSTEMS^b
MATERIAL	CLASS	GROUP WHEN THE MAXIMUM ALLOWABLE QUANTITY IS EXCEEDED	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	NA	H-2	See Note q	NA	NA	See Note q	NA	NA	See Note q	NA
Combustible fibers^q	Loose Baled^o	H-3	(100)	NA	NA	(100)	NA	NA	(20)	NA
Combustible fibers^q	Loose Baled^o	H-3	(1,000)	NA	NA	(1,000)	NA	NA	(200)	NA
Combustible liquid^{c, i}	II	H-2 or H-3	NA	120^d,e	NA	NA	120^d	NA	NA	30^d
	IIIA	H-2 or H-3		330^{d, e}			330^d			80^d
	IIIB	NA		13,200^{e, f}			13,200^f			3,300^f
Consumer fireworks	1.4G	H-3	125 ^{e, l}	NA	NA	NA	NA	NA	NA	NA
Cryogenic Flammable	NA	H-2	NA	45^d	NA	NA	45^d	NA	NA	10^d
Cryogenic Inert	NA	NA	NA	NA	NL	NA	NA	NL	NA	NA
Cryogenic Oxidizing	NA	H-3	NA	45^d	NA	NA	45^d	NA	NA	10^d
Explosives	Division 1.1	H-1	1^{e, g}	(1)^{e, g}	NA	0.25^g	(0.25)^g	NA	0.25^g	(0.25)^g
	Division 1.2	H-1	1^{e, g}	(1)^{e, g}		0.25^g	(0.25)^g		0.25^g	(0.25)^g
	Division 1.3	H-1 or H-2	10^{e, g}	(10)^{e, g}		1^g	(1)^g		1^g	(1)^g
	Division 1.4	H-3	50^{e, g}	(50)^{e, g}		50^g	(50)^g		NA	NA
	Division 1.4G	H-3	125^{d, e, l}	NA		NA	NA		NA	NA
	Division 1.5	H-1	1^{e, g}	(1)^e,g		0.25^g	(0.25)^g		0.25^g	(0.25)^g
	Division 1.6	H-1	1^{e, g}	NA		NA	NA		NA	NA
Flammable gas	Gaseous	H-2	NA	NA	1,000^{d, e}	NA	NA	1,000^{d, e}	NA	NA
Flammable gas	Liquefied	H-2	NA	(150)^{d, e}	NA	NA	(150)^{d, e}	NA	NA	NA
Flammable liquid^c	IA	H-2 or	NA	30^{d, e}	NA	NA	30^d	NA	NA	10^d
Flammable liquid^c	IB and IC	H-3	NA	120^{d, e}	NA	NA	120^d	NA	NA	30^d
Flammable liquid, combination (IA, IB, IC)	NA	H-2	NA	120^{d, e, h}	NA	NA	120^{d, h}	NA	NA	30^{d, h}
		or
		H-3
Flammable solid	NA	H-3	125^{d, e}	NA	NA	125^d	NA	NA	25^d	NA
Inert Gas	Gaseous	NA	NA	NA	NL	NA	NA	NL	NA	NA
Inert Gas	Liquefied	NA	NA	NA	NL	NA	NA	NL	NA	NA
Organic peroxide	UD	H-1	1^{e, g}	(1)^{e, g}	NA	0.25^g	(0.25)^g	NA	0.25^g	(0.25)^g
	I	H-2	5^{d, e}	(5)^{d, e}		1^d	(1)^d		1^d	(1)^d
	II	H-3	50^{d, e}	(50)^{d, e}		50^d	(50)^d		10^d	(10)^d
	III	H-3	125^{d, e}	(125)^{d, e}		125^d	(125)^d		25^d	(25)^d
	IV	NA	NL	NL		NL	NL		NL	NL
	V	NA	NL	NL		NL	NL		NL	NL
Oxidizer	4	H-1	1^g	(1)^{e, g}	NA	0.25^g	(0.25)^g	NA	0.25^g	(0.25)^g
	3^k	H-2 or H-3	10^{d, e}	(10)^{d, e}		2^d	(2)^d		2^d	(2)^d
	2	H-3	250^{d, e}	(250)^{d, e}		250^d	(250)^d		50^d	(50)^d
	1	NA	4,000^e,f	(4,000)^e,f		4,000^f	(4,000)^f		1,000^f	(1,000)^f
Oxidizing gas	Gaseous	H-3	NA	NA	1,500^{d, e}	NA	NA	1,500^{d, e}	NA	NA
Oxidizing gas	Liquefied	H-3	NA	(150)^{d, e}	NA	NA	(150)^{d, e}	NA	NA	NA
Pyrophoric	NA	H-2	4^{e, g}	(4)^{e, g}	50^{e, g}	1^g	(1)^g	10^{e, g}	0	0
Unstable (reactive)	4	H-1	1^{e, g}	(1)^{e, g}	10^{e, g}	0.25^g	(0.25)^g	2^{e, g}	0.25^g	(0.25)^g
	3	H-1 or H-2	5^{d, e}	(5)^{d, e}	50^{d, e}	1^d	(1)^d	10^{d, e}	1^d	(1)^d
	2	H-3	50^{d, e}	(50)^{d, e}	750^{d, e}	50^d	(50)^d	750^{d, e}	10^d	(10)^d
	1	NA	NL	NL	NL	NL	NL	NL	NL	NL
Water reactive	3	H-2	5^d,e	(5)^{d, e}	NA	5^d	(5)^d	NA	1^d	(1)^d
	2	H-3	50^{d, e}	(50)^{d, e}		50^d	(50)^d		10^d	(10)^d
	1	NA	NL	NL		NL	NL		NL	NL

For SI: 1 cubic foot = 0.02832 m³, 1 pound = 0.454 kg, 1 gallon = 3.785 L.

NA = Not Applicable, NL = Not Limited, UD = Unclassified Detonable.

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, foodstuff or consumer 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.
[SFM] In other than Group L occupancies, 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 where stored in approved storage cabinets, day boxes, gas cabinets, gas rooms, exhausted enclosures or in listed safety cans 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 where such materials are necessary for maintenance purposes, operation or sanitation of equipment where 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:
1. Liquid or gaseous fuel in fuel tanks on vehicles.
2. Liquid or gaseous fuel in fuel tanks on motorized equipment operated in accordance with this code.
3. Gaseous fuels in piping systems and fixed appliances regulated by the California Mechanical Code.
4. Liquid fuels in piping systems and fixed appliances, regulated by the California Mechanical Code.
5. Alcohol-based hand rubs classified as Class I or II liquids in dispensers that are installed in accordance with Sections 5705.5 and 5705.5.1. The location of the alcohol-based hand rub (ABHR) dispensers shall be provided in the construction documents.
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.

TABLE 5003.1.1(2)

MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA OF HAZARDOUS MATERIAL POSING A HEALTH HAZARD^{a, c, f, h, i}

MATERIAL	STORAGE^b			USE-CLOSED SYSTEMS^b			USE-OPEN SYSTEMS^b
MATERIAL	Solid pounds^{d, e}	Liquid gallons (pounds)^{d, e}	Gas cubic feet at NTP (pounds)^d	Solid pounds^d	Liquid gallons (pounds)^d	Gas cubic feet at NTP (pounds)^d	Solid pounds^d	Liquid gallons (pounds)^d
Corrosives	5,000	500	Gaseous 810^e Liquefied (150)	5,000	500	Gaseous 810^e Liquefied (150)	1,000	100
Highly Toxics	10	(10)	Gaseous 20^g Liquefied (4)^g	10	(10)	Gaseous 20^g Liquified (4)^g	3	(3)
Toxics	500	(500)	Gaseous 810^e Liquefied (150)^e	500	(500)	Gaseous 810^e Liquefied (150)^e	125	(125)

For SI: 1 cubic foot = 0.02832 m³, 1 pound = 0.454 kg, 1 gallon = 3.785 L.

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.
In retail and wholesale sales occupancies, the quantities of medicines, foodstuff or consumer 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.
[SFM] In other than Group L occupancies, 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 where stored in approved storage cabinets, gas cabinets or exhausted enclosures. Where Note d also applies, the increase for both notes shall be applied accumulatively.
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.
Allowed only where 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.

TABLE 5003.1.1(3)

MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA OF HAZARDOUS MATERIALS POSING A PHYSICAL HAZARD IN AN OUTDOOR CONTROL AREA^{a, b, c, d}

MATERIAL	CLASS	STORAGE^b			USE-CLOSED SYSTEMS^b			USE-OPEN SYSTEMS^b
MATERIAL	CLASS	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
Flammable gas	Liquefied	Not Applicable	(300)	Not Applicable	Not Applicable	(150)	Not Applicable	Not Applicable	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
Inert Gas	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	40	(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
Oxidizing gas	Liquefied	Not Applicable	(600)	Not Applicable	Not Applicable	(300)	Not Applicable	Not Applicable	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	(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 SI: 1 pound = 0.454 kg, 1 gallon = 3.785 L, 1 cubic foot = 0.02832 m³.

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 where such storage is in accordance with Section 5003.11.
Quantities in parentheses indicate quantity units in parentheses at the head of each column.

TABLE 5003.1.1(4)

MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA OF HAZARDOUS MATERIALS POSING A HEALTH HAZARD IN AN OUTDOOR CONTROL AREA^{a, b, c, f}

MATERIAL	STORAGE			USE-CLOSED SYSTEMS			USE-OPEN SYSTEMS
MATERIAL	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 40^d Liquefied (8)^d	10	(10)	Gaseous 20^d Liquefied (4)^d	3	(3)
Toxics	1,000	(l,000)^e	Gaseous 1,620 Liquefied (300)	500	50^e	Gaseous 810 Liquefied (150)	125	(125)^e

For SI: 1 cubic foot = 0.02832 m³, 1 pound = 0.454 kg, 1 gallon = 3.785 L, 1 pound per square inch absolute = 6.895 kPa,°C = [(°F)-32/1.8].

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 where such storage is in accordance with Section 5003.11.
Allowed only where 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.

5003.1.2 Conversion

Where quantities are indicated in pounds and where the weight per gallon of the liquid is not provided to the fire code official, a conversion factor of 10 pounds per gallon (1.2 kg/L) shall be used.

5003.1.3 Quantities not exceeding the maximum allowable quantity per control area

The storage, use and handling of hazardous materials in quantities not exceeding the maximum allowable quantity per control area indicated in Tables 5003.1.1(1) through 5003.1.1(4) shall be in accordance with Sections 5001 and 5003.

5003.1.4 Quantities exceeding the maximum allowable quantity per control area

The storage and use of hazardous materials in quantities exceeding the maximum allowable quantity per control area indicated in Tables 5003.1.1(1) through 5003.1.1(4) shall be in accordance with this chapter.

5003.2 Systems, equipment and processes

Systems, equipment and processes utilized for storage, dispensing, use or handling of hazardous materials shall be in accordance with Sections 5003.2.1 through 5003.2.8.

5003.2.1 Design and construction of containers, cylinders and tanks

Containers, cylinders and tanks shall be designed and constructed in accordance with approved standards. Containers, cylinders, tanks and other means used for containment of hazardous materials shall be of an approved type. Pressure vessels not meeting DOTn requirements for transportation shall comply with the ASME Boiler and Pressure Vessel Code.

5003.2.2 Piping, tubing, valves and fittings

Piping, tubing, valves, and fittings conveying hazardous materials shall be designed and installed in accordance with ASME B31 or other approved standards, and shall be in accordance with Sections 5003.2.2.1 and 5003.2.2.2.

5003.2.2.1 Design and construction

Piping, tubing, valves, fittings and related components used for hazardous materials shall be in accordance with the following:

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:
1. 3.1. The point of use.
2. 3.2. The tank, cylinder or bulk source.
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 where 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
in accordance with NFPA 704 are carried in pressurized piping above 15 pounds per square inch gauge (psig) (103 kPa), an approved means of leak detection and emergency shutoff or excess flow control shall be provided. Where the piping originates from within a hazardous material storage room or area, the excess flow control shall be located within the storage room or area. Where the piping originates from a bulk source, the excess flow control shall be located as close to the bulk source as practical.

Exceptions:

Piping for inlet connections designed to prevent backflow.
Piping for pressure relief devices.

5003.2.2.2 Additional regulations for supply piping for health-hazard materials

Supply piping and tubing for gases and liquids having a health-hazard ranking of 3 or 4 in accordance with NFPA 704 shall be in accordance with ASME B31.3 and the following:

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.

Exception: Piping and tubing within the space defined by the walls of corridors and the floor or roof above or in concealed spaces above other occupancies where installed in accordance with Section 415.11.6.4 of the California Building Code for Group H-5 occupancies.

5003.2.3 Equipment, machinery and alarms

Equipment, machinery and required detection and alarm systems associated with the use, storage or handling of hazardous materials shall be listed or approved.

5003.2.4 Installation of tanks

Installation of tanks shall be in accordance with Sections 5003.2.4.1 through 5003.2.4.2.1.

5003.2.4.1 Underground tanks

Underground tanks used for the storage of liquid hazardous materials shall be provided with secondary containment. In lieu of providing secondary containment for an underground tank, an above-ground tank in an underground vault complying with Section 5704.2.8 shall be permitted.

5003.2.4.2 Above-ground tanks

Above-ground stationary tanks used for the storage of hazardous materials shall be located and protected in accordance with the requirements for outdoor storage of the particular material involved.

Exception: Above-ground tanks that are installed in vaults complying with Section 5303.16 or 5704.2.8 shall not be required to comply with location and protection requirements for outdoor storage.

5003.2.4.2.1 Marking

Above-ground stationary tanks shall be marked as required by Section 5003.5.

5003.2.5 Empty containers and tanks

Empty containers and tanks previously used for the storage of hazardous materials shall be free from residual material and vapor as defined by DOTn, the Resource Conservation and Recovery Act (RCRA) or other regulating authority or maintained as specified for the storage of hazardous material.

5003.2.6 Maintenance

In addition to the requirements of Section 5003.2.3, equipment, machinery and required detection and alarm systems associated with hazardous materials shall be maintained in an operable condition. Defective containers, cylinders and tanks shall be removed from service, repaired or disposed of in an approved manner. Defective equipment or machinery shall be removed from service and repaired or replaced. Required detection and alarm systems shall be replaced or repaired where defective.

5003.2.6.1 Tanks out of service for 90 days

Stationary tanks not used for a period of 90 days shall be properly safeguarded or removed in an approved manner. Such tanks shall have the fill line, gauge opening and pump connection secured against tampering. Vent lines shall be properly maintained.

5003.2.6.1.1 Return to service

Tanks that are to be placed back in service shall be tested in an approved manner.

5003.2.6.2 Defective containers and tanks

Defective containers and tanks shall be removed from service, repaired in accordance with approved standards or disposed of in an approved manner.

5003.2.7 Liquid-level limit control

Atmospheric tanks having a capacity greater than 500 gallons (1893 L) and that contain hazardous material liquids shall be equipped with a liquid-level limit control or other approved means to prevent overfilling of the tank.

5003.2.8 Seismic protection

Machinery and equipment utilizing hazardous materials shall be braced and anchored in accordance with the seismic design requirements of the California Building Code for the seismic design category in which the machinery or equipment is classified.

5003.2.9 Testing

The equipment, devices and systems listed in Section 5003.2.9.1 shall be tested at the time of installation and at one of the intervals listed in Section 5003.2.9.2. Records of the tests conducted or maintenance performed shall be maintained in accordance with the provisions of Section 107.2.1.

Exceptions:

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.

5003.2.9.1 Equipment, devices and systems requiring testing

The following equipment, systems and devices shall be tested in accordance with Sections 5003.2.9 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.

5003.2.9.2 Testing frequency

The equipment, systems and devices listed in Section 5003.2.9.1 shall be tested at one of the frequencies listed below:

Not less than annually.
In accordance with the approved manufacturer’s requirements.
In accordance with approved recognized industry standards.
In accordance with an approved schedule.

5003.3 Release of hazardous materials

Hazardous materials in any quantity shall not be released into a sewer, storm drain, ditch, drainage canal, creek, stream, river, lake or tidal waterway or on the ground, sidewalk, street, highway or into the atmosphere.

Exceptions:

The release or emission of hazardous materials is allowed where in compliance with federal, state or local governmental agencies, regulations or permits.
The release of pesticides is allowed where used in accordance with registered label directions.
The release of fertilizer and soil amendments is allowed where used in accordance with manufacturer’s specifications.

5003.3.1 Unauthorized discharges

Where hazardous materials are released in quantities reportable under state, federal or local regulations, the fire code official shall be notified and the following procedures required in accordance with Sections 5003.3.1.1 through 5003.3.1.4.

5003.3.1.1 Records

Records of the unauthorized discharge of hazardous materials by the permittee shall be maintained.

5003.3.1.2 Preparation

Provisions shall be made for controlling and mitigating unauthorized discharges.

5003.3.1.3 Control

Where an unauthorized discharge caused by primary container failure is discovered, the involved primary container shall be repaired or removed from service.

5003.3.1.4 Responsibility for cleanup

The person, firm or corporation responsible for an unauthorized discharge shall institute and complete all actions necessary to remedy the effects of such unauthorized discharge, whether sudden or gradual, without cost to the jurisdiction. Where deemed necessary by the fire code official, cleanup can be initiated by the fire department or by an authorized individual or firm. Costs associated with such cleanup shall be borne by the owner, operator or other person responsible for the unauthorized discharge.

5003.4 Material Safety Data Sheets

Material Safety Data Sheets (MSDS) shall be readily available on the premises for hazardous materials regulated by this chapter. Where a hazardous substance is developed in a laboratory, available information shall be documented.

Exception: Designated hazardous waste.

5003.5 Hazard identification signs

Unless otherwise exempted by the fire code official, visible hazard identification signs as specified in NFPA 704 for the specific material contained shall be placed on stationary containers and above-ground tanks and at entrances to locations where hazardous materials are stored, dispensed, used or handled in quantities requiring a permit and at specific entrances and locations designated by the fire code official.

5003.5.1 Markings

Individual containers, cartons or packages shall be conspicuously marked or labeled in an approved manner. Rooms or cabinets containing compressed gases shall be conspicuously labeled: COMPRESSED GAS.

5003.6 Signs

Signs and markings required by Sections 5003.5 and 5003.5.1 shall not be obscured or removed, shall be in English as a primary language or in symbols allowed by this code, shall be durable, and the size, color and lettering shall be approved.

5003.7 Sources of ignition

Sources of ignition shall comply with Sections 5003.7.1 through 5003.7.3.

5003.7.1 Smoking

Smoking shall be prohibited and “No Smoking” signs provided as follows:

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.

Signs required by this section shall be in English as a primary language or in symbols allowed by this code and shall comply with Section 310.

5003.7.2 Open flames

Open flames and high-temperature devices shall not be used in a manner that creates a hazardous condition and shall be listed for use with the hazardous materials stored or used.

5003.7.3 Industrial trucks

Powered industrial trucks used in areas designated as hazardous (classified) locations in accordance with the California Electrical Code shall be listed and labeled for use in the environment intended in accordance with NFPA 505.

5003.8 Construction requirements

Buildings, control areas, enclosures and cabinets for hazardous materials shall be in accordance with Sections 5003.8.1 through 5003.8.6.3.

5003.8.1 Buildings

Buildings, or portions thereof, in which hazardous materials are stored, handled or used shall be constructed in accordance with the California Building Code.

5003.8.2 Required detached buildings

Group H occupancies containing quantities of hazardous materials in excess of those set forth in Table 5003.8.2 shall be in detached buildings.

TABLE 5003.8.2

DETACHED BUILDING REQUIRED

A DETACHED BUILDING IS REQUIRED WHERE 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 1.4^c	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	1,200	Not Applicable
Oxidizer, liquids and solids	Class 2	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
Unstable (reactives) nondetonable	Class 2	25	10,000
Water reactives	Class 3	1	Not Applicable
Water reactives	Class 2	25	Not Applicable
Pyrophoric gases	Not Applicable	Not Applicable	2,000

For SI: 1 pound = 0.454 kg, 1 cubic foot = 0.02832 m³, 1 ton = 2000 lbs. = 907.2 kg.

For materials that are detonable, the distance to other buildings or lot lines shall be as specified in the California 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.

5003.8.3 Control areas

Control areas shall comply with Sections 5003.8.3.1 through 5003.8.3.5.

5003.8.3.1 Construction requirements

Control areas shall be separated from each other by fire barriers constructed in accordance with Section 707 of the California Building Code or horizontal assemblies constructed in accordance with Section 711 of the California Building Code, or both.

5003.8.3.2 Percentage of maximum allowable quantities

The percentage of maximum allowable quantities of hazardous materials per control area allowed at each floor level within a building shall be in accordance with Table 5003.8.3.2.

TABLE 5003.8.3.2

DESIGN AND NUMBER OF CONTROL AREAS

FLOOR LEVEL		PERCENTAGE OF THE MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA^a	NUMBER OF CONTROL AREAS PER FLOOR	FIRE-RESISTANCE RATING FOR FIRE BARRIERS IN HOURS^b
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.

5003.8.3.3 Number

The maximum number of control areas per floor within a building shall be in accordance with Table 5003.8.3.2.

5003.8.3.4 Fire-resistance-rating requirements

The required fire-resistance rating for fire barriers shall be in accordance with Table 5003.8.3.2. The floor assembly of the control area and the construction supporting the floor of the control area shall have a fire-resistance rating of not less than 2 hours.

Exception: The floor assembly of the control area and the construction supporting the floor of the control area is allowed to be 1-hour fire-resistance rated in buildings of Type IIA, IIIA and VA construction, provided that both of the following conditions exist:

The building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1.
The building is three stories or less above grade plane.

5003.8.3.5 Hazardous material in Group M display and storage areas and in Group S storage areas

The aggregate quantity of nonflammable solid and nonflammable or noncombustible liquid hazardous materials allowed within a single control area of a Group M display and storage area or a Group S storage area is allowed to exceed the maximum allowable quantities per control area specified in Tables 5003.1.1(1) and 5003.1.1(2) without classifying the building or use as a Group H occupancy, provided that the materials are displayed and stored in accordance with Section 5003.11.

5003.8.4 Gas rooms

Where a gas room is used to increase the maximum allowable quantity per control area or provided to comply with the provisions of Chapter 60, the gas room shall be in accordance with Sections 5003.8.4.1 and 5003.8.4.2.

5003.8.4.1 Construction

Gas rooms shall be protected with an automatic sprinkler system. Gas rooms shall be separated from the remainder of the building in accordance with the requirements of the California Building Code based on the occupancy group into which it has been classified.

5003.8.4.2 Ventilation system

The ventilation system for gas rooms shall be designed to operate at a negative pressure in relation to the surrounding area. Highly toxic and toxic gases shall also comply with Section 6004.2.2.6. The ventilation system shall be installed in accordance with the California Mechanical Code

5003.8.5 Exhausted enclosures

Where an exhausted enclosure is used to increase maximum allowable quantity per control area or where the location of hazardous materials in exhausted enclosures is provided to comply with the provisions of Chapter 60, the exhausted enclosure shall be in accordance with Sections 5003.8.5.1 through 5003.8.5.3.

5003.8.5.1 Construction

Exhausted enclosures shall be of noncombustible construction.

5003.8.5.2 Ventilation

Exhausted enclosures shall be provided with an exhaust ventilation system. The ventilation system for exhausted enclosures shall be designed to operate at a negative pressure in relation to the surrounding area. Ventilation systems used for highly toxic and toxic gases shall also comply with Items 1, 2 and 3 of Section 6004.1.2. The ventilation system shall be installed in accordance with the California Mechanical Code.

5003.8.5.3 Fire-extinguishing system

Exhausted enclosures where flammable materials are used shall be protected by an approved automatic fire-extinguishing system in accordance with Chapter 9.

5003.8.6 Gas cabinets

Where a gas cabinet is used to increase the maximum allowable quantity per control area or where the location of compressed gases in gas cabinets is provided to comply with the provisions of Chapter 60, the gas cabinet shall be in accordance with Sections 5003.8.6.1 through 5003.8.6.3.

5003.8.6.1 Construction

Gas cabinets shall be constructed in accordance with the following:

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.

5003.8.6.2 Ventilation

Gas cabinets shall be provided with an exhaust ventilation system. The ventilation system for gas cabinets shall be designed to operate at a negative pressure in relation to the surrounding area. Ventilation systems used for highly toxic and toxic gases shall also comply with Items 1, 2 and 3 of Section 6004.1.2. The ventilation system shall be installed in accordance with the California Mechanical Code.

5003.8.6.3 Maximum number of cylinders per gas cabinet

The number of cylinders contained in a single gas cabinet shall not exceed three.

5003.8.7 Hazardous materials storage cabinets

Where storage cabinets are used to increase maximum allowable quantity per control area or to comply with this chapter, such cabinets shall be in accordance with Sections 5003.8.7.1 and 5003.8.7.2.

5003.8.7.1 Construction

The interior of cabinets shall be treated, coated or constructed of materials that are nonreactive with the hazardous material stored. Such treatment, coating or construction shall include the entire interior of the cabinet. Cabinets shall either be listed in accordance with UL 1275 as suitable for the intended storage or constructed in accordance with the following:

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 the California Electrical Code.

5003.8.7.2 Warning markings

Cabinets shall be clearly identified in an approved manner with red letters on a contrasting background to read:

HAZARDOUS—KEEP FIRE AWAY.

5003.9 General safety precautions

General precautions for the safe storage, handling or care of hazardous materials shall be in accordance with Sections 5003.9.1 through 5003.9.10.

5003.9.1 Personnel training and written procedures

Persons responsible for the operation of areas in which hazardous materials are stored, dispensed, handled or used shall be familiar with the chemical nature of the materials and the appropriate mitigating actions necessary in the event of fire, leak or spill.

5003.9.1.1 Fire department liaison

Responsible persons shall be designated and trained to be liaison personnel to the fire department. These persons shall aid the fire department in preplanning emergency responses and identifying the locations where hazardous materials are located, and shall have access to Material Safety Data Sheets and be knowledgeable in the site’s emergency response procedures.

5003.9.2 Security

Storage, dispensing, use and handling areas shall be secured against unauthorized entry and safeguarded in a manner approved by the fire code official.

5003.9.3 Protection from vehicles

Guard posts or other approved means shall be provided to protect storage tanks and connected piping, valves and fittings; dispensing areas; and use areas subject to vehicular damage in accordance with Section 312.

5003.9.4 Electrical wiring and equipment

Electrical wiring and equipment shall be installed and maintained in accordance with the California Electrical Code.

5003.9.5 Static accumulation

Where processes or conditions exist where a flammable mixture could be ignited by static electricity, means shall be provided to prevent the accumulation of a static charge.

5003.9.6 Protection from light

Materials that are sensitive to light shall be stored in containers designed to protect them from such exposure.

5003.9.7 Shock padding

Materials that are shock sensitive shall be padded, suspended or otherwise protected against accidental dislodgement and dislodgement during seismic activity.

5003.9.8 Separation of incompatible materials

Incompatible materials in storage and storage of materials that are incompatible with materials in use shall be separated where the stored materials are in containers having a capacity of more than 5 pounds (2 kg) or 0.5 gallon (2 L). Separation shall be accomplished by:

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.

5003.9.9 Shelf storage

Shelving shall be of substantial construction, and shall be braced and anchored in accordance with the seismic design requirements of the California Building Code for the seismic zone in which the material is located. Shelving shall be treated, coated or constructed of materials that are compatible with the hazardous materials stored. Shelves shall be provided with a lip or guard where used for the storage of individual containers.

Exceptions:

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.

Shelf storage of hazardous materials shall be maintained in an orderly manner.

5003.9.10 Safety cans

Safety cans shall be listed in accordance with UL 30 where used to increase the maximum allowable quantities per control area of flammable or combustible liquids in accordance with Table 5003.1.1(1). Safety cans listed in accordance with UL 1313 are allowed for flammable and combustible liquids where not used to increase the maximum allowable quantities per control area and for other hazardous material liquids in accordance with the listing.

5003.10 Handling and transportation

In addition to the requirements of Section 5003.2, the handling and transportation of hazardous materials in corridors, elevators, or enclosures for stairways and ramps shall be in accordance with Sections 5003.10.1 through 5003.10.4.4.

5003.10.1 Valve protection

Hazardous material gas containers, cylinders and tanks in transit shall have their protective caps in place. Containers, cylinders and tanks of highly toxic or toxic compressed gases shall have their valve outlets capped or plugged with an approved closure device in accordance with Chapter 53.

5003.10.2 Carts and trucks required

Liquids in containers exceeding 5 gallons (19 L) in a corridor or exit enclosure for a stairway or ramp shall be transported on a cart or truck. Containers of hazardous materials having a hazard ranking of 3 or 4 in accordance with NFPA 704 and transported within corridors or interior exit stairways and ramps, shall be on a cart or truck. Where carts and trucks are required for transporting hazardous materials, they shall be in accordance with Section 5003.10.3. Exceptions 1 through 4 shall not apply where elevators are utilized.

Exceptions:

Two hazardous material liquid containers that are hand carried in acceptable safety carriers.
Not more than four drums not exceeding 55 gallons (208 L) each that are transported by suitable drum trucks.
Containers and cylinders of compressed gases that are transported by approved hand trucks, and containers and cylinders not exceeding 25 pounds (11 kg) that are hand carried.
Solid hazardous materials not exceeding 100 pounds (45 kg) that are transported by approved hand trucks, and a single container not exceeding 50 pounds (23 kg) that is hand carried.

5003.10.2.1 Above the 10th story

Above the 10th story of any occupancy, all vertical handling and transportation of hazardous materials in the building shall be in approved carts.

5003.10.2.2 Transportation of hazardous materials above the 10th story

The handling and transportation of hazardous materials above the 10th story shall be limited to 5 percent of the maximum allowable quantities of Tables 5003.1(1) and (2). Quantities are permitted to be increased by 100 percent in buildings with an approved automatic sprinkler system in accordance with Section 903.3.1.1. Materials where footnote g applies shall not be increased.

5003.10.3 Carts and trucks

Carts and trucks required by Section 5003.10.2 to be used to transport hazardous materials shall be in accordance with Sections 5003.10.3.1 through 5003.10.3.6.

5003.10.3.1 Design

Carts and trucks used to transport hazardous materials shall be designed to provide a stable base for the commodities to be transported and shall have a means of restraining containers to prevent accidental dislodgement. Compressed gas cylinders placed on carts and trucks shall be individually restrained.

5003.10.3.2 Speed-control devices

Carts and trucks shall be provided with a device that will enable the operator to control safely movement by providing stops or speed-reduction devices.

5003.10.3.3 Construction

Construction materials for hazardous material carts or trucks shall be compatible with the material transported. The cart or truck shall be of substantial construction.

5003.10.3.4 Spill control

Carts and trucks transporting liquids shall be capable of containing a spill from the largest single container transported.

5003.10.3.5 Attendance

Carts and trucks used to transport materials shall not obstruct or be left unattended within any part of a means of egress.

5003.10.3.6 Incompatible materials

Incompatible materials shall not be transported on the same cart or truck.

5003.10.4 Elevators utilized to transport hazardous materials

5003.10.4.1

When transporting hazardous materials, elevators shall have no other passengers other than the individual(s) handling the chemical transport cart.

5003.10.4.2

Hazardous materials liquid containers shall have a maximum capacity of 20 liters (5.28 gal).

5003.10.4.3

Toxic and highly-toxic gases shall be limited to a container of a maximum water capacity of 1 pound.

5003.10.4.4

Means shall be provided to prevent the elevator from being summoned to other floors.

5003.11 Group M storage and display and Group S storage

The aggregate quantity of nonflammable solid and nonflammable or noncombustible liquid hazardous materials stored and displayed within a single control area of a Group M occupancy, or an outdoor control area, or stored in a single control area of a Group S occupancy, is allowed to exceed the maximum allowable quantity per control area indicated in Section 5003.1 where in accordance with Sections 5003.11.1 through 5003.11.3.11.

5003.11.1 Maximum allowable quantity per control area in Group M or S occupancies

The aggregate amount of nonflammable solid and nonflammable or noncombustible liquid hazardous materials stored and displayed within a single control area of a Group M occupancy or stored in a single control area of a Group S occupancy shall not exceed the amounts set forth in Table 5003.11.1.

TABLE 5003.11.1

MAXIMUM ALLOWABLE QUANTITY PER INDOOR AND OUTDOOR CONTROL AREA IN GROUP M AND S OCCUPANCIES—NONFLAMMABLE SOLIDS, NONFLAMMABLE AND NONCOMBUSTIBLE LIQUIDS^{d, e, f}

CONDITION		MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA
Material^a	Class	Solids pounds	Liquids gallons
A. HEALTH-HAZARD MATERIALS—NONFLAMMABLE AND NONCOMBUSTIBLE SOLIDS AND LIQUIDS
1. Corrosives^{b, c}	Not Applicable	9,750	975
2. Highly Toxics	Not Applicable	20^{b, c}	2^{b, c}
3. Toxics^{b, c}	Not Applicable	1,000	100
B. PHYSICAL-HAZARD MATERIALS—NONFLAMMABLE AND NONCOMBUSTIBLE SOLIDS AND LIQUIDS
1. Oxidizers^{b, c}	4	Not Allowed	Not Allowed
	3	1,150^g	115
	2	2,250^h	225
	1	18,000^{i, j}	1,800^{i, 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	3^{b, c}	550	55
	2^{b, c}	1,150	115
	1	Not Limited	Not Limited

For SI: 1 pound = 0.454 kg, 1 gallon = 3.785 L, 1 cubic foot = 0.02832 m³.

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. Where Note c also applies, the increase for both notes shall be applied accumulatively.
Maximum allowable quantities shall be increased 100 percent where stored in approved storage cabinets in accordance with Section 5003.8. Where 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 shall be increased to 2,250 pounds where individual packages are in the original sealed containers from the manufacturer or packager and do not exceed 10 pounds each.
Maximum allowable quantities shall be increased to 4,500 pounds where 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.

5003.11.2 Maximum allowable quantity per outdoor control area in Group M or S occupancies

The aggregate amount of nonflammable solid and nonflammable or noncombustible liquid hazardous materials stored and displayed within a single outdoor control area of a Group M occupancy shall not exceed the amounts set forth in Table 5003.11.1.

5003.11.3 Storage and display

Storage and display shall be in accordance with Sections 5003.11.3.1 through 5003.11.3.11.

5003.11.3.1 Density

Storage and display of solids shall not exceed 200 pounds per square foot (976 kg/m²) of floor area actually occupied by solid merchandise. Storage and display of liquids shall not exceed 20 gallons per square foot (0.50 L/m²) of floor area actually occupied by liquid merchandise.

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 not less than 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.
Exceptions:
1. 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.
2. For compressed gas hazardous materials, unless otherwise specified, the minimum required distances shall not apply where 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 where approved and where 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 where approved and where each group is separated by a minimum distance of 300 feet (91 440 mm).

Section 5003 General Requirements

Related Code Sections