Loading (50 kb)...'
(continued)
(c) Pumps installed above grade, outside of buildings, shall be located not less than 10 feet from lines of adjoining property which may be built upon, and not less than 5 feet from any building opening. When an outside pump location is impractical, pumps may be installed inside buildings as provided for dispensers in Section 5571(b), or in pits as provided in (d). Pumps shall be substantially anchored and protected against physical damage.
(d) Pits for subsurface pumps or piping manifolds of submersible pumps shall withstand the external forces to which they may be subjected without damage to the pump, tank or piping. The pit shallbe no larger than necessary for inspection and maintenance and shall be provided with a fitted cover.
(e) An emergency shutoff valve, incorporating a fusible link or other thermally actuated device, designed to close automatically in event of severe impact or fire exposure shall be properly installed in the supply line at the base of each individual island-type dispenser or at the inlet of each overhead dispensing unit. If a coupling incorporating a slip-joint feature is used to join the emergency valve to the dispenser piping, the emergency valve shall automatically close before the slip-joint can disengage. The automatic closing feature of this valve shall be checked at the time of initial installation and at least once a year thereafter by manually tripping the hold-open linkage.
s 5571. Fuel Dispensing System.
(a) Dispensing devices at an automotive service station shall be so located that all parts of the vehicle being served will be on the premises of the service station. Dispensing devices at marine service stations may be located on open piers, wharves, or floating docks or on shore or on piers of the solid-fill type and shall be located from other structures so as to provide room for safe ingress and egress of craft to be fueled. Dispensing units shall be in all cases at least 20 feet from any activity involving fixed sources of ignition.
(b) Dispensing units installed inside buildings after January 1, 1976, shall be separated from other areas by not less than a one-hour fire separation and shall be provided with adequate ventilation.
(c) When dispensing units are located below grade, only mechanical ventilation shall be used and the entire dispensing area shall be protected by an approved automatic sprinkler system. Ventilating systems shall be electrically interlocked with gasoline dispensing units so that the dispensing units cannot be operated unless the ventilating fan motors are energized.
s 5572. Emergency Power Cutoff.
A clearly identified and easily accessible switch(es) or circuit breaker(s) shall be provided at a location remote from dispensing devices, including remote pumping systems, to shut off the power to all dispensing devices in the event of an emergency. (Title 24, T8-5572)
s 5573. Fuel Dispensing Units.
(a) Class I liquids shall be transferred from tanks by means of fixed pumps designed and equipped to allow control of the flow and prevent leakage or accidental discharge.
(b) Only listed nozzles may be used for dispensing Class I liquids. No such nozzle may be used if it shows evidence of having been dismantled.
Exception: Nozzles which are an integral part of a gasoline vapor recovery system, certified by the State Air Resources Board and the State Fire Marshal pursuant to the provisions of Sections 41954 through 41961, inclusive, of the California Health and Safety Codes.
(c) Every dispensing nozzle for Class I liquids installed after December 31, 1978, shall contain evidence of listing so placed that any attempt to dismantle the nozzle will result in damage to such evidence, visible without disassembly or dismounting of the nozzle.
Exception: Nozzles which are an integral part of a gasoline vapor recovery system, certified by the State Air Resources Board and the State Fire Marshal pursuant to the provisions of Sections 41954 through 41961, inclusive, of the California Health and Safety Codes.
Note: A rebuilt nozzle valve shall be deemed in substantial compliance with (b) and (c) if:
(1) The nozzle valve has been approved, within the meaning of Section 3206; or
(2) The user of the nozzle valve shows a certificate prepared by the rebuilder which certifies that:
(A) The nozzle valve:
1. Has a spout that will break off at 150 pounds or less;
2. Will shut off automatically when dropped from a height of 22 inches to a concrete floor;
3. Has been pressure tested to 10 psi;
4. Has a poppet seat that has been pressure tested to 50 psi.
5. Will shut off automatically at a minimum flow rate of 5 gallons per minute; and
6. Can be reasonably expected to operate without malfunctioning due to mechanical failure in excess of 100,000 cycles under laboratory conditions; and
(B) The rebuilder of the nozzle valve has made application to a nationally recognized testing laboratory to obtain a listing in accordance with the Occupational Safety and Health Act of 1970.
(d) A control shall be provided that will permit the pump to operate only when a dispensing nozzle is removed from its bracket or normal position with respect to the dispensing unit, and the switch on this dispensing unit is manually actuated. This control shall also stop the pump when all nozzles have been returned, either to their brackets or to the normal non-dispensing position.
(e) Class I liquids shall not be dispensed by applying pressure to drums, barrels and similar containers. Approved pumps taking suction through the top of the container or approved self-closing faucets shall be used.
(f) The dispensing unit and its piping, except those attached to containers, shall be mounted on a concrete island or protected against collision damage by suitable means. If located indoors, the dispenser shall also be mounted either on a concrete island or protected against collision damage by suitable means and shall be located in a position where it cannot be struck by a vehicle that is out of control descending a ramp or other slope.
s 5574. Electrical Equipment.
(a) This Section shall apply to areas where Class I liquids are stored, handled or dispensed. For areas where Class II or Class III liquids are stored, handled or dispensed, the electrical equipment may be installed in accordance with the provisions of the California Electrical Safety Orders for nonclassified locations.
(b) All electrical equipment and wiring shall be of a type specified by and shall be installed in accordance with the California Electrical Safety Orders. All electrical equipment integral with the dispensing hose or nozzle shall be suitable for use in Division 1 locations.
(c) Table FL-9 shall be used to delineate and classify areas for the purpose of installation of electrical equipment under normal circumstances. A classified area shall not extend beyond an unpierced wall, roof or other solid partition.
(d) The area classifications listed in (c) shall be based on the premise that the installation meets the applicable requirements of these orders in all respects. (Title 24, T8-5574)
Table FL-9 Electrical Equipment Classified Areas -Service Stations
_______________________________________________________________________________
Class
I,
Group D Extent of
Location Divisi- Classified Area
on
_______________________________________________________________________________
UNDERGROUND TANK
Fill Opening 1 Any pit, box or space below grade level, any
part of which is within the Division 1 or 2
classified area.
2 Up to 18 inches above grade level within a
horizontal radius of 10 feet from a loose fill
connection and within a horizontal radius of
5 feet from a tight fill connection.
Vent Discharging 1 Within 3 feet of open end of vent,
Upward extending in all directions
2 Area between 3 feet and 5 feet of open end
of vent, extending in all directions.
_______________________________________________________________________________
DISPENSING UNITS
(except
overhead-type)
Pits 1 Any pit, box or space below grade level, any
part of which is within the Division 1 or 2
classified area.
Table FL-9 (cont.)
_______________________________________________________________________________
Class
I,
Group D Extent of
Location Divisi- Classified Area
on
_______________________________________________________________________________
Dispenser 1 The area up to 4 feet vertically above the
base within the enclosure, or up to a solid
partition less than 4 feet above the base, lo-
cated above the nozzle insertion level and
above the level of any gasketed joint, hose or
stuffing box.
2 Within 18 inches horizontally in all direc-
tions from the Division 1 area within the
enclosure.
Outdoor 2 Up to 18 inches above grade level within 20
feet horizontally of any edge of enclosure.
INDOOR
with 2 Up to 18 inches above grade or Ventilation
Mechanical
floor level within 20 feet horizontally of any edge of
enclosure.
with Gravity 2 Up to 18 inches above grade or floor level
Ventilation
within 25 feet horizontally of any edge of enclosure.
DISPENSING
UNITS,
OVERHEAD TYPE 1 Within the dispenser enclosure and 18
inches in all directions from the enclosure
where not suitably cut off by ceiling or wall.
All electrical equipment integral with the
dispensing hose or nozzle.
2 An area extending 2 feet horizontally in all
directions beyond the Division 1 area and
extending to grade below this classified area.
2 Up to 18 inches above grade level within 20
feet horizontally measured from a point
vertically below the edge of any dispenser
enclosure.
_______________________________________________________________________________
OUTDOOR 1 Any pit, box or space below grade level if
any part is within a horizontal distance of 10
feet from any edge of pump.
2 Within 3 feet of any edge of pump, extending in all
directions. Also up to 18 inches above grade level
within 10 feet horizontally from any edge of pump.
_______________________________________________________________________________
REMOTE PUMP -
IN DOOR 1 Entire area within any pit.
2 Within 5 feet of any edge of pump, extending
in all directions.
Also up to 3 feet above floor
or grade level within 25 feet horizontally
from any edge of pump.
_______________________________________________________________________________
LUBRICATION
OR SERV-
ICE ROOM
WITH 1 Any pit within any unventilated area.
DISPENSING
2 Any pit with ventilation.
2 Area up to 18 inches above floor or grade
level and 3 feet horizontally from a lubrica-
tion pit.
_______________________________________________________________________________
DISPENSER FOR
CLASS I
LIQUIDS 2 Within 3 feet of any fill or dispensing point,
extending in all directions.
LUBRICATION
OR SERV-
ICE ROOM
-WITHOUT
DISPENSING 2 Entire area within any pit used for lubrica-
tion or similar services where Class I liquids
may be released.
2 Area up to 18 inches above any such pit, and
extending a distance of 3 feet horizontally
from any edge of the pit.
_______________________________________________________________________________
SPECIAL
ENCLOSURE
INS-
IDE BUILDING
PER SEC-
TION 5567 1 Entire enclosure.
SALES,
STORAGE AND
REST ROOMS non If there is any opening to these class-rooms
clas within the extent of a Division 1 area, the entire
sified room shall be classified as Division 1.
_______________________________________________________________________________
s 5575. Heating Equipment.
(a) Heating equipment may be installed in the conventional manner except as provided in (b), (c), (d), or (e).
(b) Heating equipment may be installed in a special room separated from an area classified as Division 1 or Division 2 in Table FL-9 by walls having a fire-resistance rating of at least one hour and without any openings in the walls within 8 feet of the floor into an area classified as Division 1 or Division 2 in Table FL-9. This room shall not be used for combustible storage, and all air for combustion purposes shall come from outside the building.
(c) Heating equipment using gas or oil fuel may be installed in the lubrication or service room where there is no dispensing or transferring of Class I liquids provided the bottom of the combustion chamber is at least 18 inches above the floor and the heating equipment is protected from physical damage.
(d) Heating equipment using gas or oil fuel listed for use in garages may be installed in the lubrication or service room where Class I liquids are dispensed provided the equipment is installed at least 8 feet above the floor.
(e) Electrical heating equipment shall conform to Section 5574. (Title 24, T8- 5575)
s 5576. Fuel Delivery Nozzles.
(a) A listed manual or automatic-closing type hose nozzle shall be provided on dispensers used for the dispensing of Class I liquids.
(b) Overhead-type dispensing units shall be provided with a listed automatic-closing type hose nozzle valve without a latch-open device.
(1) A listed automatic-closing type hose nozzle valve with latch-open device may be used if the design of the system is such that the hose nozzle valve will close automatically in the event the valve is released from a fill opening or upon impact with a driveway.
(c) Dispensing nozzles used at marine service stations shall be of the automatic-closing type without a latch-open device.
(d) Manual-closing type valves shall be held open manually during dispensing. Automatic-closing type valves may be used in conjunction with an approved latch-open device.
Exception: Nozzles which are an integral part of a gasoline vapor recovery system, certified by the State Air Resources Board and the State Fire Marshal pursuant to the provisions of Sections 41954 through 41961, inclusive, of the California Health and Safety Codes.
Note: Authority and reference cited: Section 142.3, Labor Code.
s 5577. Dispensing into Portable Containers.
(a) No delivery of any Class I or Class II liquid shall be made into portable containers unless the container is constructed of metal or is approved for such use, has a tight closure and is fitted with spout or so designed that the contents can be poured without spilling.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5578. Attendance or Supervision of Dispensing.
(a) The provisions of Section 5566(a) shall not prohibit the temporary use of movable tanks in conjunction with the dispensing of flammable or combustible liquids into the fuel tanks of motor vehicles or other motorized equipment on premises not normally accessible to the public.
(b) The provisions of Section 5566(a) shall not prohibit the dispensing of Class I and Class II liquids in the open from a tank vehicle to a motor vehicle. Such dispensing shall be permitted provided:
(1) The dispensing is done on premises not open to the public.
(2) The dispensing hose does not exceed 50 feet in length.
(3) The dispensing nozzle is a listed automatic-closing type.
Note: Authority and reference cited: Section 142.3, Labor Code.
s 5579. Drainage and Waste Disposal.
(a) Provision shall be made in the area where Class I liquids are dispensed to prevent spilled liquids from flowing into the interior of service station buildings. Such provision may be by grading driveways, raising door sills, or other equally effective means.
(b) Crankcase drainings and flammable or combustible liquids shall not be dumped into sewers, streams or adjoining property, but shall be stored in tanks or drums outside any building until removed from the premises.
s 5580. Sources of Ignition.
In addition to the previous restrictions of this Article the following shall apply: There shall be no smoking or open flames in the areas used for fueling, servicing fuel systems for internal combustion engines, receiving or dispensing of Class I and Class II liquids. Conspicuous and legible signs prohibiting smoking shall be posted within sight of the customer being served. The motors of all equipment being fueled shall be shut off during the fueling operation except for emergency generators, pumps, etc., where continuing operation is essential.
s 5581. Fire Control.
Each service station shall be provided with at least one fire extinguisher having a minimum classification of 5B, C located so that an extinguisher will be within 100 feet of each pump, dispenser, underground fill pipe opening, and lubrication or service room.
s 5583. Materials.
(a) Tanks shall be built of steel except as provided in (b) through (d).
(b) Tanks may be built of materials other than steel:
(1) If required by the properties of the liquid stored. In case of doubt, the supplier, producer of the flammable or combustible liquid, or other competent authority should be consulted as to the suitability of the material of construction to be used;
(2) For installation underground;
(3) If used for the storage of Class IIIB liquids aboveground in areas not exposed to a spill or leak of a Class I or Class II liquid . If tanks storing Class IIIB liquids are located where they are exposed to a spill or leak of a Class I or Class II liquid, they shall be constructed in accordance with Section 5585; or
(4) If used for the storage of Class IIIB liquids inside a building protected by an approved automatic fire extinguishing system.
(c) Tanks built of materials other than steel shall be designed to specifications embodying principles recognized as good engineering design for the material used.
(d) Unlined concrete tanks may be used for storing flammable or combustible liquids having a gravity of 40 degrees API or heavier. Concrete tanks with special lining may be used for other services provided the design is in accordance with sound engineering practice.
(e) Special engineering consideration shall be required if the specific gravity of the liquid to be stored exceeds that of water or if the tanks are designed to contain flammable or combustible liquids at a liquid temperature below zero degrees F.
s 5584. Fabrication.
(a) Tanks may be of any shape or type consistent with sound engineering design.
(b) Metal tanks shall be welded, riveted and caulked, or bolted, or constructed by use of a combination of these methods.
s 5585. Atmospheric Tanks.
(a) Atmospheric tanks shall be built in accordance with approved standards of design. Atmospheric tanks may be built in accordance with:
(1) Underwriters' Laboratories, Inc., Standard For Steel Aboveground Tanks for Flammable and Combustible Liquids UL142-1972; Standard for Steel Underground Tanks for Flammable and Combustible Liquids, UL58-1972; or Standard for Steel Inside Tanks for Oil Burner Fuel, UL80-1968.
(2) American Petroleum Institute Standards No. 12A, Specification for Oil Storage Tanks with Riveted Shells, Seventh Edition, September 1951 or No. 650, Welded Steel Tanks for Oil Storage, Fifth Edition 1973.
(3) American Petroleum Institute Standards No. 12B, Specification for Bolted Production Tanks, Eleventh Edition, May, 1958 and Supplement I, April, 1962; No. 12D, Specification For Large Welded Production Tanks, Seventh Edition, August, 1957 and Supplement I, March, 1965; or No. 12F, Specification for Small Welded Production Tanks, Sixth Edition, March, 1968. Tanks built in accordance with these standards shall be used only as production tanks for storage of crude petroleum in oil-producing areas.
(b) Low pressure tanks and pressure vessels may be used as atmospheric tanks.
(c) Atmospheric tanks shall not be used for the storage of a flammable or combustible liquid at a temperature at or above its boiling point.
s 5585.1. Liquid Level Indicator, Temperature Regulator, Class IIIB.
Atmospheric tanks used for storing Class IIIB liquids heated by internal heating coil/element shall be equipped with a liquid level indicator or equivalent device that displays the liquid level in the tank; or a temperature regulating system. When equipped with a temperature regulating system, the temperature regulating system shall automatically shut off the heat source to the tank before the tank contents reach the ignition temperature. If a liquid level indicator is the sole sensing method, 1) the liquid level indicator shall be affixed to the tank or located elsewhere, such as in a control room, 2) the liquid level indicator shall be monitored when filling or emptying the tank, 3) the location of the internal heating coil/element on the tank shall be clearly indicated.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5586. Low Pressure Tanks.
(a) The normal operating pressure of the tank shall not exceed the design pressure of the tank.
(b) Low pressure tanks shall be built in accordance with approved standards of design. Low pressure tanks may be built in accordance with:
(1) American Petroleum Institute Standard No. 620, Recommended Rules for the Design and Construction of Large, Welded, Low-Pressure Storage Tanks, Fifth Edition 1973.
(2) The principles of the Code for Unfired Pressure Vessels, Section VIII, Division I of the ASME Boiler and Pressure Vessels Code, 1971 Edition.
(c) Atmospheric tanks built according to Underwriters' Laboratories, Inc. requirements in Section 5585(a) may be used for operating pressures not exceeding 1 psig and shall be limited to 2.5 psig under emergency venting conditions.
(d) Pressure vessels may be used as low pressure tanks.
s 5587. Pressure Vessels.
(a) The normal operating pressure of the vessel shall not exceed the design pressure of the vessel.
(b) Storage tanks designed to withstand pressures above 15 psig shall meet the requirements of the Unfired Pressure Vessel Safety Orders.
s 5588. Provisions for Internal Corrosion.
When tanks are not designed in accordance with the American Petroleum Institute, American Society of Mechanical Engineers or the Underwriters' Laboratories, Inc. Standards, or if corrosion is anticipated beyond that provided for in the design formulas used, additional metal thickness or suitable protective coatings or linings shall be provided to compensate for the corrosion loss expected during the design life of the tank.
s 5589. Installation of Outside Aboveground Tanks.
(a) Every aboveground tank for the storage of Class I, Class II or Class IIIA liquids, except those liquids with boil-over characteristics and unstable liquids, operating at pressures not in excess of 2.5 psig and designed with a weak roof-to-shell seam or equipped with emergency venting devices which will not permit pressures to exceed 2.5 psig, shall be located in accordance with Table FL-10.
(1) For the purpose of this Section, a floating roof tank is one which incorporates a pontoon or double deck roof in an open top tank in accordance with API Standard 650, or one which incorporates an internal all-metal (except for seals) floating cover with a fixed metal roof with adequate ventilation at the eaves of the roof. Tanks with internal floating covers incorporating nonmetallic construction, such as plastics, shall be treated as cone roof tanks.
(b) Every aboveground tank for the storage of Class I, Class II or Class IIIA liquids, except those liquids with boil-over characteristics and unstable flammable or combustible liquids, operating at pressures exceeding 2.5 psig or equipped with emergency venting which will permit pressures to exceed 2.5 psig shall be located in accordance with Table FL-11.
(c) Every aboveground tank for the storage of Class I, Class II or Class IIIA liquids with boil-over characteristics shall be located in accordance with Table FL-12.
(d) Every aboveground tank for the storage of unstable liquids shall be located in accordance with Table FL-13.
(e) Every aboveground tank for the storage of Class IIIB liquids, excluding unstable liquids, shall be located in accordance with Table FL-14 except when located within a diked area or drainage path for a tank or tanks storing a Class I or Class II liquid. When a Class IIIB liquid storage tank is within the diked area or drainage path for a Class I or Class II liquid, (a) or (b) shall apply.
(f) Reference minimum distances for use in Tables FL-10 to FL-13, inclusive.
(g) Where end failure of horizontal pressure tanks and vessels may expose property, the tank shall be placed with the longitudinal axis parallel to the nearest important building.
Table FL-10
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
Minimum Distance in Minimum Distance in
Feet From Property Feet From Nearest Side
Line Which May Be of Any Public Way or
Built Upon, Including From Nearest Important
the Opposite Side of Building and Shall Be
Type of a Public Way and Shall Not Less Than Five (5)
Tank Protection Be Not Less Than Five (5) Feet
Feet
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
Protection 1/2 times diameter of 1/6 times diameter of
for tank but need not tank but need not
Floating Exposures exeed 90 feet exceed 30 feet
Roof_____________________________________________________________
Diameter of tank but 1/6 times diameter of
None need not exceed 175 tank but need not exceed
feet 30 feet
_______________________________________________________________________________
Approved 1/2 times diameter of 1/6 times diameter of
foam or tank but need not tank but need not exceed
inerting exceed 90 feet 30 feet
Vertical system
with on the
Weak Roof tank
to _________________________________________________________________
Shell
Seam Protection Diameter of tank but 1/3 times diameter of
for need not exceed 175 tank but need not
Exposures feet exceed 60 feet
_________________________________________________________________
None 2 times diameter of 1/3 times diameter of
tank but need not tank but need not
exceed 350 feet exceed 60 feet
_______________________________________________________________________________
Approved
inerting
system
on the 1/2 times Table FL-15 1/2 times Table FL-15
Horizontal tank or
and approved
Vertical,
with Emer- foam
gency Relief system on
Venting to vertical
Limit tanks
Pressures _________________________________________________________________
to 2.5 Protection
psig for Table FL-15 Table FL-15
Exposures
_________________________________________________________________
None 2 times Table FL-15 Table FL-15
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
Table FL-11
----------------------------------------------------------------------
----------------------------------------------------------------------
Minimum Distance in Minimum Distance in
Feet From Property Feet From Nearest Side
Line Which May Be of Any Public Way or
Built Upon, Including From Nearest Important
Type of the Opposite Side Building
Tank Protection of a Public Way
----------------------------------------------------------------------
----------------------------------------------------------------------
Protection 1 1/2 times Table FL-15 1 1/2 times Table FL-15
for but shall not be less but shall not be less
Exposures than 25 feet than 25 feet
Any Type ____________________________________________________________
None 3 times Table FL-15 1 1/2 times Table FL-15
but shall not be less but shall not be less
than 50 feet than 25 feet
----------------------------------------------------------------------
----------------------------------------------------------------------
Table FL-12
---------------------------------------------------------------------
---------------------------------------------------------------------
Minimum Distance in Minimum Distance in
Feet From Property Feet From Nearest Side
Line Which May Be of Any Public Way or
Built Upon, Including From Nearest Important
Type of the Opposite Side Building
Tank Protection of a Public Way
---------------------------------------------------------------------
---------------------------------------------------------------------
Protection 1/2 times diameter of 1/6 times diameter of
for tank but need not tank but need not
Floating Exposures exceed 90 feet exceed 30 feet
Roof ___________________________________________________________
None Diameter of tank but 1/6 times diameter of
need not exceed 175 tank but need not exceed
feet 30 feet
_____________________________________________________________________
Approved Diameter of tank but 1/3 times diameter of
foam or need not exceed 175 tank but need not
inerting feet exceed 60 feet
Fixed system
Roof ___________________________________________________________
Protection 2 times diameter of 2/3 times diameter of
for tank but need tank but need not
Exposures not exceed 350 feet exceed 120 feet
___________________________________________________________
None 4 times diameter of 2/3 times diameter of
tank but need not tank but need not
exceed 350 feet exceed 120 feet
---------------------------------------------------------------------
---------------------------------------------------------------------
Table FL-13
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
Minimum Distance in Minimum Distance in
Feet From Property Feet From Nearest Side
Line Which May Be of Any Public Way or
Built Upon, Including From Nearest Important
Type of the Opposite Side Building
Tank Protection of a Public Way
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
Tank protected
with any one
of the
following:
Approved
water spray,
Horizontal Approved Table FL-15 but not Not less than 25 feet
and Vertical inerting, less than 25 feet
Tanks With Approved
Emergency insulation
Relief and
Venting to refrigeration,
Permit Approved
Pressure barricade
Not in _______________________________________________________________
Excess of
2.5 psig Protection 2 1/2 times Table FL-15 Not less than 50 feet
for but not less than 50
Exposures feet
_______________________________________________________________
None 5 times Table FL-15 Not less than 100 feet
but not less than 100
feet
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
Tank
protected
with any one
of the
following: 2 times Table FL-15 Not less than 50 feet
Approved but not less than
water spray, 50 feet
Horizontal Approved
and Vertical inerting,
Tanks With Approved
Emergency insulation
Relief and
Venting to refrigeration,
Permit Approved
Pressure barricade
_______________________________________________________________
Protection 4 times Table FL-15 Not less than 100 feet
for but not less than
Exposures 100 feet
_______________________________________________________________
None 8 times Table FL-15 Not less than 150 feet
but not less than
150 feet
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
Table FL-14
------------------------------------------------------------------
------------------------------------------------------------------
Minimum Distance in Minimum Distance in
Feet From Property Feet From Nearest
Line Which May Be Built Side of Any Public
Capacity Gallons Upon, Including the Way or From Nearest
Opposite Side of a Important Building
Public Way
_______________________________________________________________
12,000 or less 5 5
12,001 to 30,000 10 5
30,001 to 50,000 10 10
50,001 to 100,000 15 10
100,001 or more 15 15
------------------------------------------------------------------
------------------------------------------------------------------
Table FL-15
-----------------------------------------------------------------------
-----------------------------------------------------------------------
Minimum Distance in Minimum Distance in
Feet From Property Feet From Nearest
Line Which May Be Built Side of Any Public
Capacity Tank Upon, Including the Way or From Nearest
Gallons Opposite Side of a Important Building
Public Way
____________________________________________________________________
275 or less 5 5
276 to 750 10 5
751 to 12,000 15 5
12,001 to 30,000 20 5
30,001 to 50,000 30 10
50,001 to 100,000 50 15
100,001 to 500,000 80 25
500,001 to 1,000,000 100 35
1,000,001 to 2,000,000 135 45
2,000,001 to 3,000,000 165 55
3,000,001 Or more 175 60
-----------------------------------------------------------------------
-----------------------------------------------------------------------
Note: Authority cited: Section 142.3, Labor Code.
s 5590. Spacing (Shell-to-Shell) Between Aboveground Tanks.
(a) The distance between any two flammable or combustible liquid storage tanks shall not be less than three feet.
(b) Except as provided in (c), the distance between any two adjacent tanks any one of which stores Class I, Class II or Class IIIA liquids shall not be less than one-sixth the sum of their diameters, except when the diameter of one tank is less than one-half the diameter of the adjacent tank, the distance between the two tanks shall not be less than one-half the diameter of the smaller tank. Tanks used only for storing Class IIIB liquids may be spaced as provided in (a) unless within a diked area or drainage path for a tank storing a Class I or Class II liquid.
(c) Crude petroleum tanks at production facilities in isolated locations having capacities not exceeding 126,000 gallons (3,000 barrels), need not be separated by more than three feet.
(d) For unstable flammable or combustible liquids, the distance between such tanks shall not be less than one-half the sum of their diameters.
(e) When tanks are in a diked area containing Class I or Class II liquids, or in the drainage path of Class I or Class II liquids, and are compacted in three or more rows or in an irregular pattern, greater spacing or other means shall be provided to make inside tanks accessible for fire fighting purposes.
(f) The minimum separation between a liquefied petroleum gas container and a flammable or combustible liquid storage tank shall be 20 feet, except in the case of flammable or combustible liquid tanks operating at pressures exceeding 2.5 psig or equipped with emergency venting which will permit pressures to exceed 2.5 psig in which case the provisions of (a) and (b) shall apply. Suitable means shall be taken to prevent the accumulation of flammable or combustible liquids under adjacent liquefied petroleum gas containers such as by diversion curbs or grading. When flammable or combustible liquid storage tanks are within a diked area, the liquefied petroleum gas containers shall be outside the diked area and at least 10 feet away from the center line of the wall of the diked area. The foregoing provisions shall not apply when liquefied petroleum gas containers of 125 gallons or less capacity are installed adjacent to fuel oil supply tanks of 660 gallons or less capacity.
s 5591. Location of Outside Aboveground Tanks with Respect to Important Buildings on Same Property.
Every outside aboveground tank shall be separated from important buildings on the same property by distances not less than those specified in Section 5589(a) through (e), whichever is applicable. The appropriate distance column in Tables FL-10 through 15 that shall be used shall be the one reading: "Minimum Distance in Feet from Nearest Side of a Public Way or from Nearest Important Building."
Note: Important buildings are those buildings containing employees, flammables or explosives.
s 5592. Normal Venting for Aboveground Tanks.
(a) Atmospheric storage tanks shall be adequately vented to prevent the development of vacuum or pressure sufficient to distort the roof of a cone roof tank or exceeding the design pressure in the case of other atmospheric tanks, as a result of filling or emptying, and atmospheric temperature changes.
(b) Normal vents shall be sized either in accordance with the American Petroleum Institute Standard No. 2000, Venting Atmospheric and Low-Pressure Storage Tanks, 1968, or other accepted standard, or shall be at least as large as the filling or withdrawal connection, whichever is larger but in no case less than 1 1/4-inch nominal inside diameter.
(c) Low-pressure tanks and pressure vessels shall be adequately vented to prevent development of pressure or vacuum, as a result of filling or emptying and atmospheric temperature changes, from exceeding the design pressure of the tank or vessel. Protection shall also be provided to prevent overpressure from any pump discharging into the tank or vessel when the pump discharge pressure can exceed the design pressure of the tank or vessel.
(d) If any tank or pressure vessel has more than one fill or withdrawal connection and simultaneous filling or withdrawal can be made, the vent size shall be based on the maximum anticipated simultaneous flow.
(e) The outlet of all vents and vent drains on tanks equipped with venting to permit pressures exceeding 2.5 psig shall be arranged to discharge in such a way as to prevent localized overheating of or flame impingement on any part of the tank, in the event vapors from such vents are ignited.
(f) Tanks and pressure vessels storing Class IA liquids shall be equipped with venting devices which shall be normally closed except when venting to pressure or vacuum conditions. Tanks and pressure vessels storing Class IB and IC liquids shall be equipped with venting devices which shall be normally closed except when venting under pressure or vacuum conditions, or with approved flame arresters. Tanks of 3,000 bbls. capacity or less containing crude petroleum in crude-producing areas; and, outside aboveground atmospheric tanks under 1,000 gallons capacity containing other than Class IA flammable liquids may have open vents. (See Section 5594(b) .)
(g) Flame arresters or venting devices required in (f) may be omitted for IB and IC liquids where conditions are such that their use may, in case of obstruction, result in tank damage. Liquid properties justifying the omission of such devices include, but are not limited to, condensation, corrosiveness, crystallization, polymerization, freezing or plugging. When any of these conditions exist, consideration may be given to heating, use of devices employing special materials of construction, the use of liquid seals, or inserting.
s 5593. Emergency Relief Venting for Fire Exposure for Aboveground Tanks.
(a) Except as provided in (b), every aboveground storage tank shall have some form of construction or device that will relieve excessive internal pressure caused by exposure fires.
(b) Tanks larger than 12,000 gallons capacity storing Class IIIB liquids and not within the diked area or the drainage path of Class I or Class II liquids do not require emergency relief venting.
(c) In a vertical tank the construction referred to in (a) may take the form of a floating roof, lifter roof, a weak roof-to-shell seam, or other approved pressure relieving construction. The weak roof-to-shell seam shall be constructed to fail preferential to any other seam.
(d) Where entire dependence for emergency relief is placed upon pressure relieving devices, the total venting capacity of both normal and emergency vents shall be enough to prevent rupture of the shell or bottom of the tank if vertical, or of the shell or heads if horizontal. If unstable liquids are stored, the effects of heat or gas resulting from polymerization, decomposition, condensation, or self-reactivity shall be taken into account. The total capacity of both normal and emergency venting devices shall be not less than that derived from Table FL-16 except as provided in (f) or (g). Such device may be a self-closing manhole cover, or one using long bolts that permit the cover to lift under internal pressure, or an additional or larger relief valve or valves. The wetted area of the tank shall be calculated on the basis of 55 percent of the total exposed area of a sphere or spheroid, 75 percent of the total exposed area of a horizontal tank and the first 30 feet above grade of the exposed shell area of a vertical tank.
(e) For tanks and storage vessels designed for pressures over 1 psig, the total rate of venting shall be determined in accordance with Table FL-16, except that when the exposed wetted area of the surface is greater than 2,800 sq. ft., the total rate of venting shall be in accordance with Table FL-17 or calculated by the following formula:
CFH = 1,107 A 0.82
Where:
CFH = venting requirement, in cubic feet of free air per hour.
A = exposed wetted surface, in square feet. The foregoing formula is based on Q = 21,000 A 0.82
(f) The total emergency relief venting capacity for any specific stable liquid may be determined by the following formula:
Cubic feet of free air per hour = V 1337/L<>M
V = cubic feet of free air per hour from Table FL-16.
L = latent heat of vaporization of specific liquid in BTU per pound.
M = molecular weight of specific liquids.
Table FL-16
Wetted Area Versus Cubic Feet Free Air Per Hour [FNa1]
(14.7 psig and 60<>F.)
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Sq. Ft. CFH Sq. Ft. CFH Sq. Ft. CFH
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20 21,100 200 211,000 1,000 524,000
30 31,600 250 239,000 1,200 557,000
40 42,100 300 265,000 1,400 587,000
50 52,700 350 288,000 1,600 614,000
60 63,200 400 312,000 1,800 639,000
70 73,700 500 354,000 2,000 652,000
80 84,200 600 392,000 2,400 704,000
90 94,800 700 428,000 2,800 742,000
100 105,000 800 462,000 see (e)
120 126,000 900 493,000
140 147,000 1,000 524,000
160 168,000
180 190,000
200 211,000
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[FNa1] Interpolate for intermediate values.
Table FL-17
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Sq. Ft. CFH Sq. Ft. CFH
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2,800 742,000 9,000 1,930,000
3,000 786,000 10,000 2,110,000
3,500 892,000 13,000 2,940,000
4,000 995,000 20,000 3,720,000
4,500 1,100,000 25,000 4,470,000
5,000 1,250,000 30,000 5,190,000
6,000 1,390,00035,000 5,900,000 (continued)