ADOPTS WITH AMENDMENTS:

International Fire Code 2018 (IFC 2018)

Part I — Administrative

Part II — General Safety Provisions

Part III — Building and Equipment Design Features

Part IV — Special Occupancies and Operations

Part V — Hazardous Materials

Part VI — Referenced Standards

Part VII — Appendices

Heads up: There are no amended sections in this chapter.

User note:

About this chapter: Chapter 23 sets forth regulations for motor fuel-dispensing stations and repair garages. It addresses both liquid and gaseous motor fuels associated with automotive, marine, aircraft and fleet vehicle motor fuel-dispensing facilities. The repair garage provisions specifically address hazards associated with the different types of fuel used, including flammable and combustible liquids, hydrogen, LPG, LNG and CNG.

2301.1 Scope

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2301.1 Scope

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Automotive motor fuel-dispensing facilities, marine motor fuel dispensing facilities, fleet vehicle motor fuel-dispensing facilities and repair garages shall be in accordance with Chapter 120-3-11 Rules and Regulations of the Safety Fire Commissioner entitled, 'Rules and Regulations for Flammable and Combustible Liquids'.

Exception: This chapter shall apply to hydrogen motor fuel-dispensing and generation facilities as specified in section 2309 and repair garages where referenced by subsection 406.6, entitled, 'Repair Garages,' of the International Building Code.

2301.2 Permits

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2301.3 Construction Documents

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2301.4 Indoor Motor Fuel-Dispensing Facilities

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2301.4.1 Protection of Floor Openings in Indoor Motor Fuel-Dispensing Facilities

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2301.5 Electrical

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2301.6 Heat-Producing Appliances

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Section 2303 Location of Dispensing Devices

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2303.1 Location of Dispensing Devices

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2303.2 Emergency Disconnect Switches

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2303.2.1 Height

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Section 2304 Dispensing Operations

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2304.1 Supervision of Dispensing

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2304.2 Attended Self-Service Motor Fuel-Dispensing Facilities

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2304.2.1 Special-Type Dispensers

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2304.2.2 Emergency Controls

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2304.2.3 Operating Instructions

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2304.2.4 Obstructions to View

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2304.2.5 Communications

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2304.3 Unattended Self-Service Motor Fuel-Dispensing Facilities

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2304.3.1 General

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2304.3.2 Dispensers

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2304.3.3 Emergency Controls

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2304.3.4 Operating Instructions

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2304.3.5 Emergency Procedures

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2304.3.6 Communications

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2304.3.7 Quantity Limits

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2304.4 Dispensing Into Portable Containers

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2304.4.1 Approved Containers Required

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2304.4.2 Nozzle Operation

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2304.4.3 Location of Containers Being Filled

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Section 2305 Operational Requirements

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2305.1 Tank Filling Operations for Class I, II or III Liquids

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2305.1.1 Delivery Vehicle Location

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2305.1.2 Tank Capacity Calculation

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2305.1.3 Tank Fill Connections

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2305.2 Equipment Maintenance and Inspection

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2305.2.1 Inspections

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2305.2.2 Repairs and Service

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2305.2.3 Dispensing Devices

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2305.2.4 Emergency Shutoff Valves

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2305.2.5 Leak Detectors

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2305.3 Spill Control

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2305.4 Sources of Ignition

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2305.5 Fire Extinguishers

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2305.6 Warning Signs

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2305.7 Control of Brush and Debris

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Section 2306 Flammable and Combustible Liquid Motor Fuel-Dispensing Facilities

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2306.1 General

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2306.2 Method of Storage

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2306.2.1 Underground Tanks

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2306.2.1.1 Inventory Control for Underground Tanks

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2306.2.2 Above-Ground Tanks Located Inside Buildings

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2306.2.3 Above-Ground Tanks Located Outdoors, Above Grade

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2306.2.4 Above-Ground Tanks Located in Above-Grade Vaults or Below-Grade Vaults

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2306.2.4.1 Tank Capacity Limits

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2306.2.4.2 Fleet Vehicle Motor Fuel-Dispensing Facilities

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2306.2.5 Portable Tanks

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2306.2.6 Special Enclosures

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2306.3 Security

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2306.4 Physical Protection

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2306.5 Secondary Containment

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2306.6 Piping, Valves, Fittings and Ancillary Equipment for Use With Flammable or Combustible Liquids

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2306.6.1 Protection From Damage

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2306.6.2.1 Tank Openings

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2306.6.2.2 Fill-Pipe Connections

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2306.6.2.3 Overfill Protection

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2306.6.2.4 Siphon Prevention

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2306.6.2.5 Emergency Relief Venting

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2306.6.2.6 Spill Containers

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2306.6.3 Piping, Valves, Fittings and Ancillary Equipment for Underground Tanks

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2306.7 Fuel-Dispensing Systems for Flammable or Combustible Liquids

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2306.7.1 Listed Equipment

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2306.7.2 Fixed Pumps Required

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2306.7.3 Mounting of Dispensers

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2306.7.3.1 Additional Impact Protection

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2306.7.4 Dispenser Emergency Shutoff Valve

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2306.7.5 Dispenser Hose

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2306.7.5.1 Emergency Breakaway Devices

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2306.7.6 Fuel Delivery Nozzles

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2306.7.6.1 Special Requirements for Nozzles

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2306.7.7 Remote Pumping Systems

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2306.7.7.1 Leak Detection

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2306.7.7.2 Location

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2306.7.8 Gravity and Pressure Dispensing

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2306.7.9 Vapor-Recovery and Vapor-Processing Systems

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2306.7.9.1 Vapor-Balance Systems

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2306.7.9.1.1 Dispensing Devices

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2306.7.9.1.2 Vapor-Return Line Closeoff

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2306.7.9.1.3 Piping

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2306.7.9.1.4 Flexible Joints and Shear Joints

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2306.7.9.1.5 Testing

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2306.7.9.2 Vapor-Processing Systems

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2306.7.9.2.1 Equipment

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2306.7.9.2.2 Location

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2306.7.9.2.2.1 Distance From Dispensing Devices

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2306.7.9.2.2.2 Physical Protection

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2306.7.9.2.2.3 Downslopes

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2306.7.9.2.3 Installation

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2306.7.9.2.4 Piping

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2306.8 Alcohol-Blended Fuel-Dispensing Operations

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2306.8.1 Listed Equipment

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2306.8.2 Compatibility

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2306.8.3 Change of System Contents

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2306.8.4 Facility Identification

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2306.8.5 Marking

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2306.8.6 Maintenance and Inspection

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Section 2307 Liquefied Petroleum Gas Motor Fuel-Dispensing Facilities

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2307.1 General

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2307.2 Approvals

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2307.2.1 Approved Equipment

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2307.2.2 Listed Equipment

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2307.3 Attendants

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2307.4 Location of Dispensing Operations and Equipment

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2307.5 Additional Requirements for LP-gas Dispensers and Equipment

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2307.6 Installation of LP-gas Dispensing Devices and Equipment

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2307.6.1 Product Control Valves

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2307.6.2 Hoses

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2307.6.3 Emergency Breakaway Devices

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2307.6.4 Vehicle Impact Protection

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2307.7 Public Fueling of Motor Vehicles

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2307.8 Overfilling

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Section 2308 Compressed Natural Gas Motor Fuel-Dispensing Facilities

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2308.1 General

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2308.2 Approvals

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2308.2.1 Approved Equipment

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2308.2.2 Listed Equipment

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2308.3 Location of Dispensing Operations and Equipment

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2308.3.1 Location on Property

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2308.4 Private Fueling of Motor Vehicles

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2308.5 Pressure Regulators

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2308.6 Valves

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2308.7 Emergency Shutdown Control

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2308.8 Discharge of CNG From Motor Vehicle Fuel Storage Containers

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2308.8.1 Methods of Discharge

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2308.8.1.1 Closed Transfer System

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2308.8.1.2 Atmospheric Venting

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2308.8.1.2.1 Plans and Specifications

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2308.8.1.2.2 Cylinder Stability

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2308.8.1.2.3 Separation

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2308.8.1.2.4 Grounding and Bonding

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2308.8.1.2.5 Vent Tube

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2308.8.1.2.6 Signage

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Hydrogen motor fuel-dispensing and generation facilities shall be in accordance with this section and Chapter 58. Where a fuel-dispensing facility includes a repair garage, the repair operation shall comply with Section 2311.
Equipment used for the generation, compression, storage or dispensing of hydrogen shall be designed for the specific application in accordance with Sections 2309.2.1 through 2309.2.3.
Cylinders, containers and tanks; pressure relief devices, including pressure valves; hydrogen vaporizers; pressure regulators; and piping used for gaseous hydrogen systems shall be designed and constructed in accordance with Chapters 53, 55 and 58.
Hoses, hose connections, compressors, hydrogen generators, dispensers and electrical equipment used for hydrogen shall be listed or approved for use with hydrogen. Hydrogen motor-fueling connections shall be listed and labeled or approved for use with hydrogen.
Electrical installations shall be in accordance with NFPA 70.
In addition to the requirements of Section 2303.1, dispensing equipment shall be located in accordance with Sections 2309.3.1 through Section 2309.3.2.
Generation, compression, storage and dispensing equipment shall be located in accordance with Sections 2309.3.1.1 through 2309.3.1.5.5.
Generation, compression, or storage equipment shall be allowed outdoors in accordance with Chapter 58 and NFPA 2.
Generation, compression, storage and dispensing equipment shall be located in indoor rooms or areas constructed in accordance with the requirements of the International Building Code, the International Fuel Gas Code, the International Mechanical Code and NFPA 2.
Gaseous hydrogen systems and detection devices shall be maintained in accordance with the manufacturer's instructions.
Smoking shall be prohibited in hydrogen cutoff rooms. "No Smoking" signs shall be provided at all entrances to hydrogen fuel gas rooms.
Open flames, flame-producing devices and other sources of ignition shall be controlled in accordance with Chapter 58.
Hydrogen fuel gas rooms shall be kept free from combustible debris and storage.
Storage of gaseous hydrogen shall be in accordance with Chapters 53 and 58.
Storage of liquefied hydrogen shall be in accordance with Chapters 55 and 58.
Gaseous hydrogen compression and storage equipment located on top of motor fuel-dispensing facility canopies shall be in accordance with Sections 2309.3.1.5.1 through 2309.3.1.5.5, Chapters 53 and 58 and the International Fuel Gas Code.
Canopies shall be constructed in accordance with the motor fuel-dispensing facility canopy requirements of Section 406.7 of the International Building Code.
Fuel-dispensing areas under canopies shall be equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1. The design of the sprinkler system shall be not less than that required for Extra Hazard Group 2 occupancies. Operation of the sprinkler system shall activate the emergency functions of Sections 2309.3.1.5.3 and 2309.3.1.5.4.
Operation of the automatic sprinkler system shall activate an automatic emergency discharge system, which will discharge the hydrogen gas from the equipment on the canopy top through the vent pipe system.
Operation of the automatic sprinkler system shall activate the emergency shutdown control required by Section 2309.5.3.
Approved signage having 2-inch (51 mm) block letters shall be affixed at approved locations on the exterior of the canopy structure stating: CANOPY TOP HYDROGEN STORAGE.
Dispensing equipment need not be separated from canopies of Type I or II construction that are constructed in a manner that prevents the accumulation of hydrogen gas and in accordance with Section 406.7 of the International Building Code.

Self-service hydrogen motor fuel-dispensing systems, including key, code and card lock dispensing systems, shall be limited to the filling of permanently mounted fuel containers on hydrogen-powered vehicles.

In addition to the requirements in Section 2311, the owner of a self-service hydrogen motor fuel-dispensing facility shall provide for the safe operation of the system through the institution of a fire safety plan submitted in accordance with Section 404, the training of employees and operators who use and maintain the system in accordance with Section 406, and provisions for hazard communication in accordance with Section 407.

Dispensing systems shall be equipped with an overpressure protection device set at not greater than 140 percent of the service pressure of the fueling nozzle it supplies.
Safety precautions at hydrogen motor fuel-dispensing and generation facilities shall be in accordance with Sections 2309.5.1 through 2309.5.3.1.
Guard posts or other approved means shall be provided to protect hydrogen storage systems and use areas subject to vehicular damage in accordance with Section 312.
The vehicle shall be fueled on noncoated concrete or other approved paving material having a resistance not exceeding 1 megohm as determined by the methodology specified in EN 1081.
A manual emergency shutoff valve shall be provided to shut down the flow of gas from the hydrogen supply to the piping system.
Manual emergency shutoff valves shall be identified and the location shall be clearly visible, accessible and indicated by means of a sign.
In addition to the manual emergency shutoff valve required by Section 2309.5.2, a remotely located, manually activated emergency shutdown control shall be provided. An emergency shutdown control shall be located within 75 feet (22 860 mm) of, but not less than 25 feet (7620 mm) from, dispensers and hydrogen generators.
Activation of the emergency shutdown control shall automatically shut off the power supply to all hydrogen storage, compression and dispensing equipment; shut off natural gas or other fuel supply to the hydrogen generator; and close valves between the main supply and the compressor and between the storage containers and dispensing equipment.

The repair, purging, defueling or discharge activities associated with hydrogen motor fuel supply systems and tanks and the installation of the systems shall be in accordance with Chapters 53 and 58 and NFPA 2.

Exception: The fuel supply piping from the fuel storage tank to the engine compartment on a motor vehicle or forklift.

A documented procedure that explains the logic sequence for defueling or discharging operations shall be maintained on site and shall be provided to the fire code official upon request. The procedure shall include what actions the operator is required to take in the event of a low-pressure or high-pressure hydrogen release during discharging activity. Schematic design documents shall be maintained on site, illustrating the arrangement of piping, regulators and equipment settings. The schematic shall illustrate the piping and regulator arrangement and shall be shown in spatial relation to the location of the vehicle being defueled and, if applicable, to the compressor, storage vessels and emergency shutdown devices.

Section 2310 Marine Motor Fuel-Dispensing Facilities

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2310.1 General

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2310.2 Storage and Handling

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2310.2.1 Class I, II or IIIA Liquid Storage

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2310.2.2 Class II or IIIA Liquid Storage and Dispensing

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2310.2.3 Heating Equipment

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2310.3 Dispensing

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2310.3.1 General

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2310.3.2 Supervision

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2310.3.3 Hoses and Nozzles

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2310.3.4 Portable Containers

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2310.3.5 Liquefied Petroleum Gas

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2310.4 Fueling of Marine Vehicles at Other Than Approved Marine Motor Fuel-Dispensing Facilities

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2310.4.1 Class I Liquid Fuels

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2310.4.2 Class II or III Liquid Fuels

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2310.5 Fire Prevention Regulations

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2310.5.1 Housekeeping

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2310.5.2 Spills

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2310.5.3 Rubbish Containers

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2310.5.4 Marine Vessels and Craft

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2310.5.5 Sources of Ignition

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2310.5.5.1 Smoking

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2310.5.6 Preparation of Tanks for Fueling

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2310.5.7 Warning Signs

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2310.6 Fire Protection

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2310.6.1 Standpipe Hose Stations

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2310.6.2 Obstruction of Fire Protection Equipment

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2310.6.3 Access

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2310.6.4 Portable Fire Extinguishers

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Repair garages shall comply with this section and the International Building Code. Repair garages for vehicles that use more than one type of fuel shall comply with the applicable provisions of this section for each type of fuel used.

Where a repair garage includes a motor fuel-dispensing facility, the fuel-dispensing operation shall comply with the requirements of this chapter for motor fuel-dispensing facilities.

The storage and use of flammable and combustible liquids in repair garages shall comply with Chapter 57 and Sections 2311.2.1 through 2311.2.4.
Cleaning of parts shall be conducted in listed and approved parts-cleaning machines in accordance with Chapter 57.
Waste oil, motor oil and other Class IIIB liquids shall be stored in approved tanks or containers, which are allowed to be stored and dispensed from inside repair garages.
Tanks storing Class IIIB liquids in repair garages are allowed to be located at, below or above grade, provided that adequate drainage or containment is provided.
Crankcase drainings shall be classified as Class IIIB liquids unless otherwise determined by testing.
Garage floor drains, where provided, shall drain to approved oil separators or traps discharging to a sewer in accordance with the International Plumbing Code. Contents of oil separators, traps and floor drainage systems shall be collected at sufficiently frequent intervals and removed from the premises to prevent oil from being carried into the sewers.
Crankcase drainings and liquids shall not be dumped into sewers, streams or on the ground, but shall be stored in approved tanks or containers in accordance with Chapter 57 until removed from the premises.
Self-closing metal cans shall be used for oily waste.
Spray finishing with flammable or combustible liquids shall comply with Chapter 24.
Sources of ignition shall not be located within 18 inches (457 mm) of the floor and shall comply with Chapters 3 and 35.
Appliances and equipment installed in a repair garage shall comply with the provisions of the International Building Code, the International Mechanical Code and NFPA 70.
Smoking shall not be allowed in repair garages except in approved locations.
Pits and below-grade work areas in repair garages shall comply with Sections 2311.4.1 through 2311.4.3.
Pits and below-grade work areas shall be constructed in accordance with the International Building Code.
Pits and below-grade work areas shall be provided with means of egress in accordance with Chapter 10.
Where Class I liquids or LP-gas are stored or used within a building having a basement or pit wherein flammable vapors could accumulate, the basement or pit shall be provided with mechanical ventilation in accordance with the International Mechanical Code, at a minimum rate of 11/2 cubic feet per minute per square foot (cfm/ft2) [0.008 m3/(s • m2)] to prevent the accumulation of flammable vapors.
Vehicles powered by LP-gas and the servicing of vehicles powered by LP-gas shall be in compliance with this chapter, Chapter 61 of this code and NFPA 58.
LNG vehicles and CNG vehicles shall comply with Sections 2311.6.1 and 2311.6.2, as applicable.
LNG vehicle fuel system pressure shall be measured and recorded prior to entering the repair facility. The maximum allowable system pressure shall be not more than 170 psig (1172 kPa). Pressure greater than 170 psig (1172 kPa) shall be reduced by operating the vehicle or limited venting outdoors, as required.

CNG vehicle fuel system pressure and the ambient temperature shall be measured and recorded prior to entering the repair facility. Pressure greater than the indicated maximum pressure in accordance with Table 2311.6.2 shall be reduced by defueling the vehicle.

TABLE 2311.6.2

TEMPERATURE COMPENSATED CYLINDER PRESSURE TABLEa

GAS TEMPERATURE °FPRESSURE IN FULL 3,600 PSI
CNG CONTAINER, psig
123.64,500
1204,455
1104,272
1004,105
903,936
803,768
703,600
603,432
503,263
403,094
302,926
202,757
102,589
02,421
-102,253
-202,086
-301,919
-401,753

For SI: °C = [(°F) - 32]/1.8, 1 psig = 6.895 kPa.

  1. 3,600 psi service pressure calculated from the standard gas composition used to create the gasoline gallon equivalent (GGE).
Fire extinguishers shall be provided in accordance with Section 906.

The room, motor vehicle repair booth or motor vehicle repair space containing repair garage activities for the conversion or repair of vehicles that use CNG, LNG, hydrogen or other lighter-than-air motor fuels shall be in accordance with Sections 2311.8 through 2311.8.11 in addition to the other requirements of Section 2311. Repair garages for the repair of vehicles that use hydrogen fuel shall be in accordance with this code and NFPA 2.

Exceptions:

  1. Repair garages where work is conducted only on vehicles that have been defueled and their systems purged with nitrogen gas, and where standard operating procedures to document and maintain the fueling status throughout repair operations are approved.
  2. Repair garages where work is not performed on the fuel system and is limited to exchange of parts and maintenance not requiring open flame or welding on the CNG-, LNG-, hydrogen- or other lighter-than-air-fueled motor vehicle.
  3. Repair garages for hydrogen-fueled vehicles where work is not performed on the hydrogen storage tank and is limited to the exchange of parts and maintenance not requiring open flame or welding on the hydrogen-fueled vehicle. During the work, the entire hydrogen fuel system shall contain less than 200 cubic feet (5.6 m3) of hydrogen.
  4. Repair garages for natural-gas-fueled vehicles where work is not being performed on the fuel storage tank, and is limited to the exchange of parts and maintenance not requiring open flame or welding on the natural-gas-fueled vehicle. During the work, the natural gas, in the vehicle fuel tank shall contain a pressure of not more than 250 psi at 70°F (1724 kPa at 21°C).

For vehicles powered by gaseous fuels, the fuel shutoff valves shall be closed prior to repairing any portion of the vehicle fuel system.

Vehicles powered by gaseous fuels in which the fuel system has been damaged shall be inspected and evaluated for fuel system integrity prior to being brought into the repair garage. The inspection shall include testing of the entire fuel delivery system for leakage.

Repair garages used for the repair of hydrogen-fueled vehicles shall be provided with an approved exhaust ventilation system in accordance with the International Mechanical Code and Chapter 6 of NFPA 2.
Motor vehicle repair rooms shall be enclosed with not less than 1-hour fire barriers constructed in accordance with Section 707 of the International Building Code, or horizontal assemblies constructed in accordance with Section 711 of the International Building Code, or both, with 1-hour rated opening protectives.
The design and construction of motor vehicle repair booths shall be in accordance with Sections 2311.8.4.1 through 2311.8.4.4.
Motor vehicle repair booths shall be constructed of approved noncombustible materials. Where walls or ceiling assemblies are constructed of sheet metal, single-skin assemblies shall be not thinner than 0.0478 inch (18 gage) (1.2 mm) and each sheet of double-skin assemblies shall be not thinner than 0.0359 inch (20 gage) (0.9 mm). Structural sections of motor vehicle repair booths shall be sealed in an approved manner.
The interior surfaces of motor vehicle repair booths shall be constructed to permit the free passage of exhaust air from all parts of the interior.

Means of egress shall be provided in accordance with Chapter 10.

Exception: Means of egress doors from premanufactured motor vehicle repair booths shall be not less than 30 inches (762 mm) in width by 80 inches (2032 mm) in height.

Motor vehicle repair booths shall be installed so that all parts of the booth be provided with ready access for cleaning. A clear area of not less than 3 feet (914 mm) wide shall be maintained on all sides of the motor vehicle repair booth. This clear area shall be kept free of any storage or combustible construction.

Exceptions:

  1. This requirement shall not prohibit locating a motor vehicle repair booth closer than 3 feet (914 mm) to or directly against an interior partition, wall or floor/ceiling assembly that has a fire-resistance rating of not less than 1 hour, provided that the motor vehicle repair booth can be adequately maintained and cleaned.
  2. This requirement shall not prohibit locating a motor vehicle repair booth closer than 3 feet (914 mm) to an exterior wall or a roof assembly, provided that the wall or roof is constructed of noncombustible material and the motor vehicle repair booth can be adequately maintained and cleaned.
Where such spaces are not separately enclosed, noncombustible spray curtains shall be provided to restrict the spread of flammable gases.
Motor vehicle repair booths or spaces installed in a room or area protected by an automatic sprinkler system shall have the protection extended to include the inside of the motor vehicle repair booth or space.
Portable fire extinguishers complying with Section 906 shall be provided for motor vehicle repair rooms, motor vehicle repair booths or motor vehicle repair spaces.

Repair garages used for the repair of CNG, LNG, or other lighter-than-air motor fuels other than hydrogen shall be provided with an approved mechanical ventilation system. The mechanical exhaust ventilation system shall be in accordance with the International Mechanical Code and Sections 2311.8.8.1 and 2311.8.8.2.

Exception: Where approved by the fire code official, natural ventilation shall be permitted in lieu of mechanical exhaust ventilation.

For indoor locations, air supply inlets and exhaust outlets for mechanical ventilation shall be arranged to provide uniformly distributed air movement with inlets uniformly arranged on walls near floor level and outlets at the high point of the room in walls or the roof.

Failure of the ventilation system shall cause the fueling system to shut down.

The exhaust ventilation rate shall be not less than 1 cubic foot per minute (0.03 m3/minute) per 12 cubic feet (34 m3) of room volume.

The mechanical exhaust ventilation system shall operate continuously.

Exceptions:

  1. Mechanical exhaust ventilation systems that are interlocked with a gas detection system designed in accordance with Sections 2311.8.9 through 2311.8.9.2.
  2. Mechanical exhaust ventilation systems in repair garages that are used only for repair of vehicles fueled by liquid fuels or odorized gases, such as CNG, where the ventilation system is electrically interlocked with the lighting circuit.
Repair garages used for repair of vehicles fueled by nonodorized gases including, but not limited to, hydrogen and nonodorized LNG, shall be provided with a gas detection system that complies with Section 916. The gas detection system shall be designed to detect leakage of nonodorized gaseous fuel. Where lubrication or chassis service pits are provided in garages used for repairing nonodorized LNG-fueled vehicles, gas sensors shall be provided in such pits.

Activation of the gas detection alarm shall result in all of the following:

  1. Initiation of local audible and visual alarms in approved locations.
  2. Deactivation of heating systems located in the repair garage.
  3. Activation of the mechanical exhaust ventilation system, where the ventilation system is interlocked with gas detection.
Failure of the gas detection system shall automatically deactivate the heating system, activate the mechanical exhaust ventilation system where the system is interlocked with the gas detection system and cause a trouble signal to sound in an approved location.

Areas within 18 inches (450 mm) of a ceiling within a motor vehicle repair room or motor vehicle repair booth shall be designed and installed in accordance with the requirements for Class I, Division 2 classified locations, as set forth in NFPA 70.

Exceptions:

  1. Rooms with exhaust ventilation of not less than 1 cubic foot per minute per square foot (0.3 m3/ min/m2) of floor area, with suction taken from a point within 18 inches (450 mm) of the highest point in the ceiling in repair garages for vehicles that use CNG, liquefied natural gas (LNG) or other lighter-than-air motor fuels.
  2. Rooms used for the repair of hydrogen-fueled vehicles that have an approved exhaust ventilation system in accordance with the International Mechanical Code and NFPA 2.
Facilities for repairing or replacing hydrogen fuel tanks on hydrogen-fueled vehicles shall have equipment to defuel vehicle storage tanks. Where work must be performed on a vehicle's fuel storage tank for the purpose of maintenance, repair or cylinder certification, defueling and purging shall be conducted in accordance with Section 2309.6 and NFPA 2.
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