Motor fuel dispensing facilities, marine/motor fuel
dispensing facilities, motor fuel dispensing facilities located
inside buildings, and fleet vehicle motor fuel dispensing facilities shall comply with Sections 30.1 and 30.4 and NFPA 30A.
Hydrogen fueling facilities shall comply with NFPA 2.
Permits, where required, shall comply with
Section 1.12.
Associated Piping and Other Environmental Requirements, see 310 CMR: Department of Environmental Protection.
The occupancy classification
of a motor fuel dispensing facility that is located inside a building or structure shall be a special purpose industrial occupancy
as defined in NFPA 101 or as determined in accordance with
the adopted building code. [30A:7.3.1]
In a motor fuel dispensing facility that is located inside a building or structure, the required number, location, and construction of means of egress shall meet all applicable requirements for special purpose industrial occupancies, as set forth in NFPA 101 or as determined in accordance with the adopted building code. [30A:7.3.3]
For an unattended self-serve, motor fuel dispensing facility, additional fire protection shall be provided where required by the State Fire Marshal.
The fire protection system shall be installed in accordance with the requirements of the State Fire Marshal.
The fuel dispensing area shall be separated from all other portions of the building by walls, partitions, floors, and floor-ceiling assemblies having a fire resistance rating of not less than 2 hours. [30A:7.3.6.1]
Interior finish shall be of noncombustible materials
or of approved limited-combustible materials, as defined in this
Code and NFPA 220. [30A:7.3.6.2]
Door and window openings in fire-rated interior walls shall be provided with listed fire doors having a fire protection rating of not less than 11/2 hours. Doors shall be self-closing. They shall be permitted to remain open during normal operations if they are designed to close automatically in a fire emergency by means of listed closure devices. Fire doors shall be installed in accordance with NFPA 80. They shall be kept unobstructed at all times. [30A:7.3.6.3]
Openings for ducts in fire-rated interior partitions and walls shall be protected by listed fire dampers. Openings for ducts in fire-rated floor or floor-ceiling assemblies shall be protected with enclosed shafts. Enclosure of shafts shall be with wall or partition assemblies having a fire resistance rating of not less than 2 hours. Openings for ducts into enclosed shafts shall be protected with listed fire dampers. [30A:7.3.6.4]
The fuel dispensing area shall be located at street
level, with no dispenser located more than 50 ft (15 m) from
the vehicle exit to, or entrance from, the outside of the building. [30A:7.3.6.5]
The fuel dispensing area shall be limited to that
required to serve not more than four vehicles at one time.
[30A:7.3.6.6.1]
Where only Class II and Class III liquids are
dispensed at fleet vehicle motor fuel dispensing facilities, the
number of vehicles serviced at any one time shall be permitted
to be increased to 12. [30A:7.3.6.6.2]
A mechanical exhaust system that serves only the
fuel dispensing area shall be provided when two or more sides
of the dispensing area are not open to the building exterior.
[30A:7.3.6.7.1]
This system shall meet all of the following requirements:
- The system shall be interlocked with the dispensing system so that airflow is established before any dispensing device can operate. Failure of airflow shall automatically shut down the dispensing system.
- The exhaust system shall be designed to provide air movement across all portions of the floor of the fuel dispensing area and to prevent the flowing of ignitible vapors beyond the dispensing area.
- Exhaust inlet ducts shall not be less than 3 in. (76 mm) or more than 12 in. (305 mm) above the floor. Exhaust ducts shall not be located in floors or penetrate the floor of the dispensing area. Exhaust ducts shall discharge to a safe location outside the building.
- The exhaust system shall provide ventilation at a rate of not less than 1 ft3/min/ft2 (0.3 m3/min/m2) of floor area, based on the fuel dispensing area.
- The exhaust system shall meet all applicable requirements of NFPA 91.
The floor of the dispensing area shall be liquidtight.
Where Class I liquids are dispensed, provisions shall be made
to prevent spilled liquids from flowing out of the fuel dispensing area and into other areas of the building by means of curbs,
scuppers, special drainage systems, or other means acceptable
to the AHJ. [30A:7.3.6.8]
The construction and protection of, as
well as the control of hazards in, garages used for major repair
and maintenance of motorized vehicles and any sales and servicing facilities associated therewith shall comply with Sections
30.2 and 30.4 and NFPA 30A.
Permits, where required, shall comply with
Section 1.12.
The occupancy classification
of a repair garage shall be a special purpose industrial occupancy as defined in NFPA 101, or as determined in accordance
with the adopted building code. [30A:7.4.1]
In a repair garage, the required
number, location, and construction of means of egress shall
meet all applicable requirements for special purpose industrial
occupancies, as set forth in NFPA 101, or as determined in
accordance with the adopted building code. [30A:7.4.2]
In areas of repair garages used for repair or
servicing of vehicles, floor assemblies shall be constructed of
noncombustible materials or, if combustible materials are used
in the assembly, they shall be surfaced with approved, nonabsorbent, noncombustible material, except as indicated in
30.2.4.1. [30A:7.4.3]
Slip-resistant, nonabsorbent, interior floor finishes
having a critical radiant flux not more than 9.87 Btu/in.2
(0.45 W/cm2), as determined by NFPA 253, shall be permitted.
[30A:7.4.3.1]
In areas of repair garages where vehicles are serviced,
any floor drains shall be properly trapped and shall discharge
through an oil/water separator to the sewer or to an outside
vented sump. [30A:7.4.3.3]
If in the opinion of the AHJ, it is deemed necessary, automatic sprinkler protection shall be installed in accordance with NFPA, when any vehicle containing or using gasoline or any other petroleum product for fuel or power is kept in a garage and are loaded with merchandise, which is of such a flammable nature as to be readily ignitable.
Repair garages used for repair of vehicle engine fuel systems fueled by nonodorized gases, such as hydrogen and non-odorized LNG/CNG, shall be provided with an approved flammable gas detection system. Gas detection systems in repair garages for hydrogen vehicles shall be in accordance with NFPA 2. [30A:7.4.6]
The flammable gas detection system shall be calibrated to the types of fuels or gases used by the vehicles to be
repaired. [30A:7.4.6.1.1]
The gas detection system shall be designed to activate when the level of flammable gas exceeds 25 percent of the lower flammable limit (LFL). Gas detection shall also be provided in lubrication or chassis repair pits of garages used for repairing non-odorized LNG/CNG fueled vehicles [30A:7.4.6.1.2]
Activation of the gas detection system shall result in all of the following:
[30A:7.4.6.2]
Forced air heating, air-conditioning, and ventilating
systems serving a fuel dispensing area inside a building or a
repair garage shall not be interconnected with any such systems
serving other occupancies in the building. Such systems shall
be installed in accordance with NFPA 90A. [30A:7.5.1]
Return air openings in areas of repair garages used
for the repair or servicing of vehicles or in a fuel dispensing
area shall be not less than 18 in. (455 mm) above floor level
measured to the bottom of the openings. [30A:7.5.2]
Combined ventilation and heating systems shall not recirculate air from areas that are below grade level. [30A:7.5.3]
Exhaust duct openings shall be located so that they effectively remove vapor accumulations at floor level from all parts of the floor area. Where lighter-than-air gaseous fuel vehicles are repaired, exhaust duct openings shall be located so that they effectively remove vapor accumulations at the ceiling level. [30A:7.5.4]
Heat-producing appliances shall be listed for use in
classified areas. [30A:7.6.2.1]
Heat-producing appliances shall be of an approved type. Solid fuel stoves, improvised furnaces, salamanders, and space heaters shall not be permitted in areas of repair garages used for repairing or servicing of vehicles or in a fuel dispensing area. [30A:7.6.2.2]
Exception 1:
Unit heaters, when installed in accordance with Chapter 7 of NFPA 30A, need
not meet this requirement.
Heat-producing equipment in any lubrication room
or service room where there is no dispensing or transferring of
Class I or Class II liquids or LP-Gas, when installed in accordance with Chapter 7 of NFPA 30A, shall be listed. [30A:7.6.2.3]
Heat-producing appliances shall be permitted to be
installed in a special room that is separated from areas that are
classified as Division 1 or Division 2, in accordance with Chapter 8 of NFPA 30A, by walls that are constructed to prevent the
transmission of vapors, that have a fire resistance rating of at
least 1 hour, and that have no openings in the walls that lead to
a classified area within 8 ft (2.4 m) of the floor. Specific small
openings through the wall, such as for piping and electrical
conduit, shall be permitted, provided the gaps and voids are
filled with a fire-resistant material to resist transmission of
vapors. All air for combustion purposes shall be taken from
outside the building. This room shall not be used for storage of
combustible materials, except for fuel storage as permitted by
the standards referenced in 30.2.8.9. [30A:7.6.3]
Heat-producing appliances using gas or oil fuel shall
be permitted to be installed in a lubrication or service room
where there is no dispensing or transferring of Class I liquids,
including the open draining of automotive gasoline tanks,
provided the bottom of the combustion chamber is at least
18 in. (455 mm) above the floor and the appliances are protected from physical damage. [30A:7.6.4]
Heat-producing appliances using gas or oil fuel listed
for use in garages shall be permitted to be installed in lubrication rooms, service rooms, or fuel dispensing areas where
Class I liquids are dispensed or transferred, provided the equipment is installed at least 8 ft (2.4 m) above the floor. [30A:
7.6.5]
Where major repairs are conducted on CNG-fueled vehicles or LNG lighter-than-air-fueled vehicles, open flame heaters or heating equipment with exposed surfaces having a temperature in excess of 750°F (399°C) shall not be permitted in areas subject to ignitible concentrations of gas. [30A:7.6.6]
Electrical heat-producing appliances shall meet the
requirements of Chapter 8 of NFPA 30A. [30A:7.6.7]
Fuels used shall be of the type and quality specified
by the manufacturer of the heating appliance. Crankcase drainings shall not be used in oil-fired appliances, unless the appliances are specifically approved for such use. [30A:7.6.8]
Heat-producing appliances shall be installed to meet
the requirements of NFPA 31, NFPA 54, NFPA 82, NFPA 90A,
and NFPA 211, as applicable, except as hereinafter specifically
provided. [30A:7.6.9]
Pits, below grade work areas, and subfloor work areas used for lubrication, inspection, and minor automotive maintenance work shall comply with the provisions of this chapter, in addition to other applicable requirements of NFPA 30A. [30A: 7.4.4.1]
Walls, floors, and structural supports shall be constructed of masonry, concrete, steel, or other approved noncombustible materials. [30A: 7.4.4.2]
In pits, belowgrade work areas, and subfloor work areas, the required number, location, and construction of means of egress shall meet the requirements for special purpose industrial occupancies in Chapter 40 of NFPA 101. [30A: 7.4.4.3]
Pits, below grade work areas, and subfloor work areas shall be provided with exhaust ventilation at a rate of not less than 1 ft3/min/ft2 (0.3 m3/min/m2) of floor area at all times that the building is occupied or when vehicles are parked in or over these areas. Exhaust air shall be taken from a point within 12 in. (0.3 m) of the floor. [30A: 7.4.4.4]
Repair garages servicing self-propelled vehicles
powered by GH2 or LH2 shall comply with NFPA 2.
In a repair garage, the required
number, location, and construction of means of egress shall
meet all applicable requirements for special purpose industrial
occupancies, as set forth in NFPA 101 or as determined in
accordance with the adopted building code. [30A:7.4.2]
In a repair garage, the required
number, location, and construction of means of egress shall
meet all applicable requirements for special purpose industrial
occupancies, as set forth in NFPA 101, or as determined in
accordance with the adopted building code. [30A:7.4.2]
In areas of repair garages used for repair
or servicing of vehicles, floor assemblies shall be constructed of
noncombustible materials or, if combustible materials are used
in the assembly, they shall be surfaced with approved, nonabsorbent, noncombustible material, except as indicated in
30.3.2.3.1. [30A:7.4.3]
Slip-resistant, nonabsorbent, interior floor finishes
having a critical radiant flux not less than 9.87 Btu/in.2-hr
(0.45 W/cm2), as determined by NFPA 253, shall be required.
[30A:7.4.3.1]
In areas of repair garages where vehicles are serviced, any floor drains shall be properly trapped and shall
discharge through an oil/water separator to the sewer or to an
outside vented sump. [30A:7.4.3.3]
Pits, belowgrade work areas, and subfloor work
areas used for lubrication, inspection, and minor automotive
maintenance work shall comply with the provisions of this
chapter, in addition to other applicable requirements of NFPA
30A. [30A:7.4.4.1]
Walls, floors, and structural supports shall be
constructed of masonry, concrete, steel, or other approved
noncombustible materials. [30A:7.4.4.2]
In pits, belowgrade work areas, and subfloor work areas, the required number, location, and construction of means of egress shall meet the requirements for special purpose industrial occupancies in Chapter 40 of NFPA 101 or as determined in accordance with the adopted building code. [30A:7.4.4.3]
Pits, belowgrade work areas, and subfloor work
areas shall be provided with exhaust ventilation at a rate of not
less than 1 ft3/min/ft2 (0.3 m3/min/m2) of floor area at all
times that the building is occupied or when vehicles are parked
in or over these areas. Exhaust air shall be taken from a point
within 12 in. (0.3 m) of the floor. [30A:7.4.4.4]
Automatic sprinkler protection installed in accordance with the requirements of Section 13.3 shall be provided throughout all buildings containing repair garages, as herein defined, where any one of the following conditions exist:
- The building housing the repair garage is two or more stories, including basements, and the aggregate area of the repair garage exceeds 10,000 ft2 (930 m2).
- The repair garage is one story and exceeds 12,000 ft2 (1115 m2).
- The repair garage is servicing vehicles parked in the basement of the building.
Repair garages used for repair
of vehicle engine fuel systems fueled by nonodorized gases
shall be provided with an approved flammable gas detection
system. Gas detection systems in repair garages for hydrogen
vehicles shall be in accordance with NFPA 2. [30A:7.4.6]
The flammable gas detection system shall be calibrated to the types of fuels or gases used by vehicles to be
repaired. [30A:7.4.6.1.1]
The gas detection system shall be designed to activate when the level of flammable gas exceeds 25 percent of the
lower flammable limit (LFL). [30A:7.4.6.1.2]
Activation of the gas detection system shall result in all of the following:
[30A:7.4.6.2]
Forced air heating, air-conditioning, and ventilating
systems serving a fuel dispensing area inside a building or a
repair garage shall not be interconnected with any such systems
serving other occupancies in the building. Such systems shall
be installed in accordance with NFPA 90A. [30A:7.5.1]
Return air openings in areas of repair garages for
vehicles powered by LP-Gas used for the repair or servicing of
vehicles or in a fuel dispensing area shall be not less than 18 in.
(455 mm) above floor level measured to the bottom of the
openings.
For repair garages for vehicles powered by LP-Gas,
exhaust duct openings shall be located so that they effectively
remove vapor accumulations at floor level from all parts of the
floor area. Where lighter-than-air gaseous fuel vehicles are
repaired, exhaust duct openings shall be located so that they
effectively remove vapor accumulations at the ceiling level.
Heat-producing appliances shall be listed for use
in classified areas. [30A:7.6.2.1]
Solid fuel stoves, improvised furnaces, salamanders, and space heaters shall not be permitted in areas of repair
garages used and repairing or servicing of vehicles or in a fuel
dispensing area. [30A:7.6.2.2]
Heat-producing equipment in any lubrication room or service room where there is no dispensing or transferring of Class I or Class II liquids or LP-Gas, when installed in accordance with Chapter 7 of NFPA 30A shall be listed. [30A:7.6.2.3]
Heat-producing appliances shall be permitted to be
installed in a special room that is separated from areas that are
classified as Division 1 or Division 2, in accordance with Chapter 8 of NFPA 30A, by walls that are constructed to prevent the
transmission of vapors, that have a fire resistance rating of at
least 1 hour, and that have no openings in the walls that lead to
a classified area within 8 ft (2.4 m) of the floor. Specific small
openings through the wall, such as for piping and electrical
conduit, shall be permitted, provided the gaps and voids are
filled with a fire-resistant material to resist transmission of
vapors. All air for combustion purposes shall be taken from
outside the building. This room shall not be used for storage of
combustible materials, except for fuel storage as permitted by
the standards referenced in 30.2.8.9. [30A:7.6.3]
Heat-producing appliances using gas or oil fuel
shall be permitted to be installed in a lubrication or service
room where there is no dispensing or transferring of Class I
liquids, including the open draining of automotive gasoline
tanks, provided the bottom of the combustion chamber is at
least 18 in. (455 mm) above the floor and the appliances are
protected from physical damage. [30A:7.6.4]
Heat-producing appliances using gas or oil fuel
listed for use in garages shall be permitted to be installed in
lubrication rooms, service rooms, or fuel dispensing areas
where Class I liquids are dispensed or transferred, provided the
equipment is installed at least 8 ft (2.4 m) above the floor.
[30A:7.6.5]
Where repairs are conducted on lighter-than-air-fueled vehicles, open flame heaters or heating equipment with exposed surfaces having a temperature in excess of 750°F (399°C) shall not be permitted in areas subject to ignitible concentrations of gas. [30A:7.6.6]
Electrical heat-producing appliances shall meet the
requirements of Chapter 8 of NFPA 30A. [30A:7.6.7]
Fuels used shall be of the type and quality specified
by the manufacturer of the heating appliance. Crankcase drainings shall not be used in oil-fired appliances, unless the appliances are specifically approved for such use. [30A:7.6.8]
Heat-producing appliances shall be installed to
meet the requirements of NFPA 31, NFPA 54, NFPA 82, NFPA
90A, and NFPA 211, as applicable, except as hereinafter specifically provided. [30A:7.6.9]
Paragraph 30.3.3 shall apply to the construction of
new buildings, existing buildings, and portions of buildings
serving as repair garages and repair areas for CNG and LNG
vehicles. [30A:7.8.1.1]
In a repair garage, the required
number, location, and construction of means of egress shall
meet all applicable requirements for special purpose industrial
occupancies as set forth in NFPA 101 or as determined in
accordance with the adopted building code. [30A:7.8.3]
CNG vehicle repair areas shall be classified according to Table 30.3.3.4.2. [30A:7.8.4.2]
[30A:Table 7.8.4.2]
|
Type of Repair
|
Minimum Repair Area
Classification |
|
|
≤500
|
Minor ongoing repair work or unattended vehicle storage while
undergoing minor repair
|
Minor repair area
|
|
≤500
|
Major ongoing repair work or unattended vehicle storage while
undergoing major repair
|
Major repair area
|
|
>500
|
Ongoing major or minor repair work or unattended vehicle storage while
undergoing major or minor repair
|
Major repair area
|
LNG vehicle repair areas shall be classified according to Table 30.3.3.4.3. [30A:7.8.4.3]
*See 30.3.3.4.3.1 and 30.3.3.4.3.2.
[30A:Table 7.8.4.3]
|
Vehicle Status
|
Type of Vehicle Repair
|
Minimum Repair Area
Classification |
|
|
<65% of tank
MAWP* |
Any liquid
volume |
Minor ongoing repair work or unattended vehicle
storage while undergoing
minor repair
|
Minor (ongoing repair work) or major repair area
(unattended vehicle storage)
|
| Major ongoing repair work or unattended vehicle
storage while undergoing
major repair
|
Major repair | ||
[30A:Table 7.8.4.3]
All vehicles upon first entering the facility shall have a tank pressure less than 65 percent of the tank maximum allowable working pressure (MAWP) as per the ASME Boiler Pressure Vessel Code. [30A:7.8.4.3.1]
High-pressure fuel systems shall be depressurized
in accordance with the original equipment manufacturers'
recommended maintenance procedures. [30A:7.8.4.3.2]
In areas of repair garages used for repair
or servicing of vehicles, floor assemblies shall be constructed of
noncombustible materials or combustible materials. [30A:7.8.5]
If combustible materials are used in the floor assembly, they shall meet the provisions of 30.3.3.5.2. [30A:7.8.5.1]
Combustible materials used in the floor assembly
shall be surfaced with approved, nonabsorbent, noncombustible material, except as indicated in 30.3.3.5.3. [30A:7.8.5.2]
Major repair garages and major repair areas serving LNG-fueled vehicles shall comply with the following:
[30A:7.8.5.3]
Where installed, slip-resistant, nonabsorbent interior floor finishes shall have a critical radiant flux of not less
than 9.87 Btu/in.2-hr (0.45 W/cm2), as determined by NFPA
253. [30A:7.8.5.4]
In areas of repair garages where vehicles are serviced, floor drains shall be properly trapped and discharge
through an oil/water separator either to the sewer or to an
outside vented sump. [30A:7.8.5.6]
In repair garages or areas where CNG or LNG vehicles
are repaired, all the applicable requirements of NFPA 52 shall
be met. [30A:7.8.6]
Roof and ceiling structures — and their accessories
or attachments — shall be constructed to not impede the free
movement of gas toward ventilation fans and gas sensor locations. [30A:7.8.7.1]
Where gas movement in roof and ceiling structures is impeded, provisions to mitigate gas holdup shall be
made. [30A:7.8.7.2]
Walls and partitions separating major repair areas
from other repair spaces, including mechanical equipment
rooms, shall be constructed to minimize the migration of natural gas to the other repair spaces. [30A:7.8.8.1]
Walls and partitions separating major repair areas
from occupied spaces other than repair areas shall be gastight.
[30A:7.8.8.2]
Walls and partitions shall have a fire resistance
rating of not less than 1 hour as defined in NFPA 101 or as
determined in accordance with the adopted building code.
[30A:7.8.8.3]
Penetrations of gastight walls for ducts, pipes,
conduits, and structural members shall be sealed to prevent
migration of natural gas. [30A:7.8.8.4]
Hinged doors separating major repair areas from all other interior areas shall be in accordance with the following:
- Be self-closing and equipped with seals
- Not be equipped with baffles, louvres, or other penetrations
Rollup doors separating major repair areas from all other interior areas shall remain closed when not in use. [30A:7.8.8.6]
Windows located in walls or partitions separating
major repair areas from other spaces shall be self-closing or
non-opening. [30A:7.8.8.7]
Pits used in major repair garages for CNG and LNG
vehicles shall have a continuous ventilation system as per Table
8.3.3 of NFPA 30A or a ventilation system that is initiated automatically upon the detection of a gas concentration of 25
percent of the lower flammable limit (LFL). [30A:7.8.9.2]
Pit ventilation systems shall have provisions for
manual activation inside and outside of the pit. [30A:7.8.9.3]
Manual activation shall not defeat the automatic
activation stipulated in 30.3.3.9.2. [30A:7.8.9.4]
The flammable gas detection
system shall be calibrated to the types of fuels or gases used by
the vehicles to be repaired. [30A:7.8.11.1]
The gas detection system shall be designed to
activate when the level of flammable gas exceeds 25 percent of
the LFL. [30A:7.8.11.1.1]
Gas detection shall also be provided in lubrication or chassis repair pits in buildings serving LNG vehicles.
[30A:7.8.11.1.2]
Activation of the gas detection system shall result in all of the following automatic actions:
- Initiation of distinct audible and visual alarm signals in the repair garage
- Deactivation of all heating systems located in the repair garage
- De-energization of all spark-producing electrical systems and components and motors within 455 mm (18 in.) of the ceiling
- Activation of the purge ventilation system as specified in 30.3.3.12.4
Where the ventilation system is interlocked with gas detection, failure of the gas detection system shall cause a trouble signal to sound in an approved location. [30A:7.8.11.3.2]
Heating, ventilating, and air conditioning of
repair garages and repair areas for servicing CNG and LNG
vehicles shall meet the requirements of 30.2.7.1, 30.2.7.2, and
30.2.7.3. [30A:7.8.12.1]
Exhaust duct openings shall be located so that
they effectively remove vapor accumulation at floor level from
all parts of the floor area. [30A:7.8.12.2]
Exhaust duct openings shall be located so that
they effectively remove vapor accumulations at the ceiling level
within 455 mm (18 in.) of the ceiling. [30A:7.8.12.3]
Where required, purge ventilation shall comply
with 30.3.3.12.4.1, 30.3.3.12.4.2, and 30.3.3.12.4.3. [30A:
7.8.12.4]
The purge ventilation capacity required for major repair areas shall be determined in accordance with the maintenance room volume as per Table 30.3.3.12.4.1. [30A:7.8.12.4.1]
Source: Canadian Standards Association B401, Vehicle Maintenance Facilities Code, Table 4, 2018.
[30A:Table 7.8.12.4.1]
| Minimum Air Changes per Hour (ACH) |
Major Repair Area Volume, V (m3) |
| 10.0 | V < 400 |
| 8.5 | 400 ≤ V < 800 |
| 7.0 | 800 ≤ V < 1600 |
| 6.0 | 1600 ≤ V < 3200 |
| 5.0 | 3200 ≤ V < 6400 |
| 4.5 | 6400 ≤ V < 12800 |
| 4.0 | V ≥ 12800 |
[30A:Table 7.8.12.4.1]
For minor repair areas, a
minimum purge ventilation rate of two air changes per hour
(ACH) shall be provided. [30A:7.8.12.4.2]
Ventilation shall meet the requirements of applicable mechanical standards, building codes, or local regulations. [30A:7.8.12.4.3.1]
In no case shall ventilation be less than 0.5
ACH. [30A:7.8.12.4.3.2]
Natural or mechanical ventilation shall extract
air from within 0.5 m (20 in.) of the ceiling. [30A:7.8.12.4.3.3]
Heat-producing appliances shall be listed and installed in accordance with the manufacturer's instructions, governing codes, and the requirements of this section. [30A:7.8.13.1]
Solid fuel stoves, improvised furnaces, salamanders, and portable space heaters shall not be permitted. [30A:7.8.13.2]
The following shall be considered potential sources of ignition and prohibited from locations as specified elsewhere in this Code for CNG and LNG vehicle repair areas:
- Open flame heaters
- Heating systems and other equipment either not employing sealed combustion or with exposed surface temperatures exceeding 399°C (750°F)
- Unit heaters
- Water heaters not employing sealed combustion
- Fired pressure washers
- Arcing and sparking tools or equipment
- Gas-fired cutting torches
Fired heating equipment installed in minor repair areas for CNG and LNG vehicles shall meet the following requirements:
- Fired heating equipment shall be located with flame and combustion air inlet elevation a minimum of 0.61 m (24 in.) above the floor level and a minimum of 1.1 m (42 in.) below the ceiling.
- Fired heating equipment and its combustion air intake shall not be located directly above where a vehicle is normally parked for servicing.
- Fired heating equipment shall be located a minimum horizontal distance of 1 m from all parts of the vehicle.
Where permitted by the manufacturer's installation instructions, 30.3.3.13.4.1 shall not apply to radiant heaters with surface temperatures not exceeding 399°C (750°F).
[30A:7.8.13.4.2]
Installation of equipment for defueling CNG and LNG vehicles for repair and other purposes shall be in accordance with the following requirements:
- Defueling equipment and installations shall be designed in accordance with applicable codes and standards.
- Defueling equipment and installations shall be approved by the authority having jurisdiction.
- Defueling and captive vent systems and equipment shall be designed to recover, store, flare, or vent gas in a safe manner.
- Where gas is vented, the vent outlet shall comply with the following:
- Be a minimum of 4.5 m (15 ft) away from building ventilation and heating and air-conditioning exhaust and intake locations
- Be at a minimum elevation of 3 m (10 ft) above surrounding buildings or equipment within 15 m (50 ft) of the vent location
- Be directed in a vertically upward direction
- Have an electrical area classification in accordance with Table 8.3.3 of NFPA 30A
Defueling equipment and captive vent piping
systems shall be designed in accordance with CSA B51, Boiler,
Pressure Vessel, and Pressure Piping Code, or ASME B31.3, Process
Piping, where applicable. [30A:7.8.14.2]
The location of defueling equipment shall
consider the safe movement and parking of the defueling vehicle, as well as other vehicular traffic. [30A:7.8.14.3]
Defueling equipment shall be protected from vehicle impact. [30A:7.8.14.4]
The flexible hoses of the defueling equipment
shall be designed to minimize the potential for hose contact
with the ground, accidental hose damage, and tripping
hazards. [30A:7.8.14.5]
All defueling equipment, hoses, and piping
systems shall be bonded to a common ground. [30A:7.8.14.6.1]
Convenient bonding of vehicle fuel containers
to decanting equipment shall be provided. [30A:7.8.14.6.2]
T h e defueling hose shall be electrically conductive. [30A:7.8.14.6.3]
The captive vent system shall be designed with
engineering supervision. [30A:7.8.14.7.2]
The LNG captive vent system shall meet the following requirements:
- The captive vent system shall be designed for cryogenic temperatures and have a design pressure rating in accordance with the highest potential vent flow pressure.
- The captive vent piping system shall be without any inline valves.
- A single captive vent shall not serve more than one vehicle fuel container.
- The captive vent systems using cryogenic flexible hoses shall be designed to minimize the potential for hose contact with the floor, accidental hose damage, and tripping hazards.
- The captive vent system hoses and piping systems shall be electrically conductive and grounded.
- Convenient bonding of the vehicle fuel container to the captive vent system shall be provided.
In a repair garage, the required
number, location, and construction of means of egress shall
meet all applicable requirements for special purpose industrial
occupancies, as set forth in NFPA 101, or as determined in
accordance with the adopted building code.
Walls, floors, and structural supports
shall be constructed of masonry, concrete, steel, or other
approved noncombustible materials.
Automatic sprinkler protection installed in accordance with the requirements of Section 13.3 shall be provided
throughout the fire area containing the repair garage.
An automatic smoke detection system shall be
installed throughout the fire area containing the repair garage
in accordance with NFPA 70, NFPA 72, and Section 13.7 of this
Code.
Operations conducted in
motor fuel dispensing facilities and repair garages shall comply
with Section 42.7.