Subchapter B. DRYCLEANING AND DYEING
GENERAL PROVISIONS Sec.
23.71. Definitions.
23.72. Scope.
23.73. Application and approval of plans.
23.74. Penalty.
GENERAL BUILDING CLASSIFICATIONS
23.81. Classification.
CONSTRUCTION—GENERALLY
23.91. Class I buildings.
23.92. Class II buildings.
23.93. Class III buildings.
23.94. Class IV buildings.
GENERAL STANDARDS
23.101. Occupancy.
23.102. Air.
23.103. Flues.
23.104. Equipment.
23.105. Safety and sanitation.
EQUIPMENT AND OPERATING CONDITIONS FOR CLASS II, III
AND IV PLANTS
23.111. Solvents.
23.112. Heating.
23.113. Interlocking covers.
23.114. Approval.
23.115. Ventilation.
23.116. Fire extinguishers.
23.117. Unfired pressure vessels.
CLASS II AND III PLANTS—ADDITIONAL REQUIREMENTS
23.121. Fire protection devices.
23.122. Grounding.
23.123. Lighting and fixtures.
CLASS IV PLANTS—ADDITIONAL REQUIREMENTS
23.131. Equipment.
23.132. Spotting and scrubbing.
SOLVENT TANKS
23.141. General requirements.
23.142. Fuel oil storage tanks.
23.143. Shipping drums or containers.
Authority The provisions of this Subchapter B issued under the Dry Cleaning and Dyeing Law (35 P. S. § § 1269.1—1269.19) (Repealed), unless otherwise noted.
Source The provisions of this Subchapter B adopted June 28, 1950, amended through July 1, l968.
GENERAL PROVISIONS
§ 23.71. Definitions.
The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:
Drycleaning and dyeing—The business or process of cleaning or dyeing wearing apparel, cloth, fabrics, textiles, leather goods, feathers, furs and hats of any type or kind, by immersion and agitation or immersion only, in a commercially nonaqueous volatile or volatile and flammable liquid solvent, applied either manually or by means of a mechanical appliance, including sponging or brushing of such articles by the use of such solvents.
Fire-resistive construction—All buildings or parts of buildings which are constructed of such nonflammable material as stone, steel, concrete, brick, tile or expanded metal lath with plaster, when specifically permitted by a provision of this subchapter and other materials as may be approved from time to time.
Flash point—The temperature at which the solvent gives off vapor sufficient to form an ignitable mixture with the air.
Grade—The main elevation of the ground adjoining the building on all sides not exceeding one step of 8 inches.
Multiple story—More than one story or occupancy.
Story—That part comprised between the upper surface of any floor and the upper surface of the floor or roof next above in that portion of the building above grade, ground or curb level. If any mezzanine, balcony or gallery shall extend over 33% or more of the horizontal area within the outer walls of the building, it shall be considered as a story. A garret or pipe loft shall be considered as a story if the average ceiling height exceeds 8 feet and it is so constructed as to make occupancy of it possible. If any portion of a building is located above grade, ground or curb level, that portion shall be determined a story if the height of each of the two corners farthest above grade, ground or curb level shall average 5 feet or more above the grade, ground or curb level. These measurements shall be at grade, ground or curb levels to the upper side of the next floor above. Where a portion of the building is located below grade, ground or curb level and the average height from the first floor to the grade, ground or curb levels, measured at each of the two corners, farthest above grade, ground or curb level is greater than 5 feet, that portion below the first shall be determined as constituting a story.
Toxic—A solvent disseminated to areas that may tend to injure the health of employes.§ 23.72. Scope.
(a) This subchapter pertains to drycleaning and dyeing establishments, and sets forth rules to safeguard the lives, limbs and health of workers in the establishments.
(b) Both employer and employe, and manufacturers of drycleaning equipment and systems have the responsibility of complying with this subchapter.
§ 23.73. Application and approval of plans.
(a) No person, firm or corporation may erect, maintain, construct or operate a drycleaning or dyeing establishment without first obtaining approval from the Department. This approval is in addition to a local or zoning permit which may be necessary.
(b) Application for this purpose shall be made upon forms prescribed by the Department and shall be accompanied by drawings in triplicate covering floor plan, and exterior elevations of the building, including the position of machinery and equipment, fire extinguishing equipment, when required by the Dry Cleaning and Dyeing Law (35 P. S. § § 1269.1—1269.19), exhaust fans, motors, type of wiring, storage tanks and other pertinent information relating to the construction, maintenance, equipment and operation of the establishment.
(c) A plot plan shall also be furnished, showing the location of the dry cleaning building and relative distances to surrounding properties.
(d) A fee of $48 shall be charged for the approval of plans.
Source The provisions of this § 23.73 amended July 26, 1974, 4 Pa.B. 1533. Immediately preceding text appears at serial page (8405).
§ 23.74. Penalty.
A person who violates a provision of this subchapter or the regulations of the Department or who interferes with the Department or its authorized representative in the enforcement of the provisions or regulations shall be penalized under section 17 Dry Cleaning and Dyeing Law (35 P. S. § § 1269.17).
GENERAL BUILDING CLASSIFICATIONS
§ 23.81. Classification.
Buildings enumerated in sections 4—8 of the Dry Cleaning and Dyeing Law (35 P. S. § § 1269.4—1269.8) shall be classified as follows:
(1) Class I. The buildings in this class use class I solvent which is a flammable petroleum solvent having the following properties:
Flash point (closed cup tester) Lower than 100 °F. (2) Class II. The buildings in this class use class II solvent which is a flammable petroleum solvent having the following properties:
Flash point (closed cup tester) Lower than 138.2° F. but higher than 99° F. Initial boiling point Lower than 357.8° F. but higher than 300° F. Ignition temperature Lower than 453.2° F. but higher than 400° F. Power limit of explosive range Not less than 1.1% by volume of air. Spontaneous heating The solvent shall not heat spontaneously. (3) Class III. The buildings in this class use class III solvent which is a flammable petroleum solvent having the following properties:
Flash point (closed cup tester) Not lower than 138.2° F. Initial boiling point Not lower than 357.8° F. Ignition temperature Not lower than 453.2° F. Power limit of explosive range Not less than 0.8% by volume in air at an initial temperature of 302° F. Spontaneous heating The solvent shall not heat spontaneously. (4) Class IV. The buildings in this class use Class IV solvent which is a commercially nonaqueous liquid solvent that is volatile but does not contain flash point ingredients and which is neither a Class I, Class II nor a Class III solvent.
CONSTRUCTION—GENERALLY
§ 23.91. Class I buildings.
The erection, adaption or relocation of a Class I drycleaning and dry-dyeing plant as defined in section 4 of the Dry Cleaning and Dyeing Law (35 P. S. § 1269.4) is prohibited. However, changes to machinery and equipment of existing class I plants may be granted upon application and approval of the Department.
§ 23.92. Class II buildings.
(a) Height and location. No drycleaning or dry-dyeing buildings as enumerated in class II may exceed one story in height. Buildings may not have attics, concealed walls, concealed roof spaces, basements or pits. No building may be located within 10 feet of another building unless they are separated by an unpierced wall.
(b) Walls. No more than two sides of a drycleaning or dyeing room may have blank walls, and interior dividing partitions shall be of at least 4-hours fire-resistive construction. In addition, the walls of drycleaning, dyeing, tumbler or drying rooms shall be of one or more of the following:
(1) Brick laid in cement mortar.
(2) Reinforced concrete at least 12 inches in thickness.
(3) Stone laid in cement mortar at least 16 inches in thickness.
(4) Other noncombustible material constructed of a thickness at least 12 inches.
(c) Roof. The roof, ceiling or other construction shall be of fire-resistive construction rated 2-hours fire resistive as classified in accordance with the Standard for Fire Tests of Building Construction and Materials and listed by Underwriters’ Laboratories, Inc. Hinged skylights of metal sash and wire glass shall be placed in the roof of each drycleaning or dyeing room. They shall occupy an area equal to at least 1/8 the floor area of the room. The skylights shall be arranged to open under pressure in case of an explosion and close automatically thereafter. The roof covering shall be of incombustible material.
(d) Floors. Floors shall be constructed of concrete not less than 4 inches thick with a troweled, cement top finish and shall be of nonsparking type. Floors may not be lower than the exterior grade surrounding a wall in which there is an opening or vent. There may be no basement, cellar or open space below the floor.
(e) Egress. There shall be provided from a room used for drycleaning or dyeing two means of egress at least 3 feet in width, located as remote from each other as possible, opening directly to the outside of the building. They shall be unobstructed and ready for use at all times.
(f) Doors and windows. Doors shall be at least class A self-closing fire doors as classified by the Underwriters’ Laboratories, Inc. Every window opening shall be fitted with solid-steel sash with 1/4 inch wire glass. Doors and windows shall open outward.
(g) Intercommunicating opening. There may be no intercommunicating opening from a drycleaning, tumbler or drying room to a pressing, sewing or finishing room. There may be an intercommunicating opening between a drycleaning or dyeing room and a drying room, which shall be protected by a standard self-closing fire door rated A label or better as classified by Underwriters’ Laboratories, Inc.
(h) Sewer connection. There may be no direct sewer connection with the drycleaning, tumbler or dyeing room.
§ 23.93. Class III buildings.
(a) Walls. The walls of drycleaning, dyeing, tumbler or drying rooms shall be of fire-resistive construction, the walls of which may be of brick, concrete block laid in cement mortar or of reinforced concrete at least 8 inches in thickness. Interior dividing partitions shall be of construction equal to at least 2 hours fire resistivity.
(b) Multiple story. When a drycleaning or dyeing room is located in a multiple story building, the remainder of the building may not be used for purposes of public assembly or for living, housing or dwelling purposes. The building shall be of fire-resistive construction, the walls of which may be of brick, concrete block laid in cement mortar or of reinforced concrete at least 8 inches in thickness.
(c) Roof. The roof, ceiling or other construction shall be of fire-resistive construction rated one hour fire-resistive as classified in accordance with the Standard for Fire Tests of Building Construction and Materials and listed by Underwriters’ Laboratories, Inc. Hinged skylights of metal sash and wire glass shall be placed in the roof of each drycleaning or dry-dyeing room. They shall occupy an area equal to at least 1/8 the floor area of the room. Skylights shall open under pressure in case of an explosion and close automatically thereafter. The roof covering shall be of incombustible material.
(d) Floor. The floor of every drycleaning, dyeing, tumbler or drying room shall be of concrete construction at least four inches in thickness and shall not be lower than the surface of the earth surrounding any wall in which there is an opening or vent. If any such room is located over a basement, the floor of such room shall be liquid and vapor tight.
(e) Doors and windows. All doors shall be at least class B self-closing fire doors as classified by the Underwriters’ Laboratories, Inc. All window openings shall be protected with metal sash and wire glass. Doors and windows shall open outward.
(f) Intercommunicating openings. Intercommunicating openings from drycleaning, tumbler and drying rooms shall be provided with fire-resistive, self-closing doors, classified by Underwriters’ Laboratories B label or better.
(g) Egress. Any room used for the purpose of drycleaning or dyeing shall have at least one exit which opens to the outside of the building or to an interior fireproof fire structure. No less than two means of egress shall be provided. They shall be unobstructed and ready for use at all times.
(h) Sewer connection. There shall be no direct sewer connection with the drycleaning, tumbler or dyeing room.
(i) Basement cellar. Any basement, cellar or open space below the first story of any building in which a drycleaning plant is located shall be used only by the person, partnership or firm operating such plant.
(j) Exhaust fan. There shall be installed in such basement, cellar or open space, an exhaust fan of sufficient capacity, and a flue or flues of noncombustible material adequate to prevent concentration of vapors above the maximum concentrations as specified in this subchapter for drycleaning or dyeing rooms.
§ 23.94. Class IV buildings.
(a) One story. Any room used for drycleaning or dyeing shall have a ceiling covered with noncombustible material approved by the Department.
(b) One story walls. All walls of drycleaning, dyeing, tumbler or drying rooms shall be of brick laid in cement mortar, or of reinforced concrete, or of stone laid in cement mortar, or covered with other noncombustible material approved by the Department.
(c) Multiple story. If any drycleaning or dyeing room is located in a multiple story building, the remainder of the building may not be used for any purpose of public assembly, or for any living, housing, or dwelling purposes, except that the owner of the drycleaning or dyeing plant may occupy part of the building for his living quarters.
(d) Multiple story walls. When drycleaning or dyeing rooms are located in a multiple story building, the walls of the buildings shall consist of brick or reinforced concrete not less than 8 inches in thickness or any other material equal in fire-resistive rating. The ceiling above the drycleaning or dry-dyeing room shall consist of 1 inch of cement plaster on metal lath or other material which is the equivalent of 1 hour fire resistance as listed by the Underwriters’ Laboratories, Inc.
(e) Floors. The floors of every drycleaning, tumbler or dyeing room, shall be of concrete construction not less than 4 inches in thickness or other noncombustible material approved by the Department.
(f) Egress. Any room used for the purpose of drycleaning or dyeing shall have at least one exit which opens to the outside of the building or to an interior fireproof structure. No less than two means of egress shall be provided. They shall be unobstructed and ready for use at all times.
(g) Doors and windows. Door openings shall be protected by at least class C label doors, as classified by the Underwriters’ Laboratories, Inc., and shall be of the self-closing type.
(h) Basement. Any basement, cellar or other open space below the first story of any building in which a drycleaning or dyeing plant is located shall be used only by the person, partnership, association or corporation operating the drycleaning or dyeing plant. Any basement, cellar or other open space, shall have installed therein an exhaust fan, or fans of sufficient size and a flue or flues of noncombustible material adequate to prevent concentration of vapors above the maximum concentration as specified in this subchapter for the drycleaning or dyeing rooms in class IV drycleaning and dyeing plants.
GENERAL STANDARDS
§ 23.101. Occupancy.
(a) The drycleaning room shall not be used for any purpose or occupancy other than spotting, sponging, brushing, reclaiming of solvents and housing of drying cabinets and tumblers.
(b) Proper aisle space shall be maintained for employes to walk between machines or equipment.
§ 23.102. Air.
(a) Venting apertures shall be provided near the floor level in such numbers and positions as to provide free circulation of air and shall be covered by galvanized wire.
(b) Adequate fresh air entrances shall be provided to avoid a negative gauge pressure in every drycleaning, dyeing, tumbler or drying room.
§ 23.103. Flues.
(a) All flues and discharge outlets of vent apertures shall be provided with suitable wire screen or equivalent to avoid hazards to surrounding properties.
(b) Flues and discharge pipes shall extend at least 6 feet above the roof lines or ceiling level of the drycleaning or dyeing room and shall not terminate within 10 feet, measured horizontally, of any door, window or frame wall of any adjoining or adjacent building.
§ 23.104. Equipment.
(a) Where carbon tetrachloride, perchlorethylene or trichlorethylene is used for spotting, sponging or brushing, these operations shall be performed under an effective type of exhaust hood.
(b) In cleaning of stills and equipment using synthetic solvents the operator shall be provided with an approved type of respiratory equipment.
(c) Machinery or equipment may not be placed in any establishment in excess of the sustaining power of the floor or walls.
(d) The use or reinstallation of used drycleaning equipment, including stills, tanks and tumblers, is not permitted, but upon application to the Department the use of such equipment may be granted after an inspection and approval by the Board.
§ 23.105. Safety and sanitation.
(a) ‘‘No smoking’’ signs shall be posted in conspicuous places in drycleaning, dyeing, tumbler and drying rooms.
(b) The floors, walls, ceiling, windows, machinery and all other parts of buildings shall be kept free from the accumulation of lint and dirt.
(c) Receptacles of fire-resistive material shall be provided for receiving refuse or other material and shall be emptied every day.
(d) When required by the Department, the employer shall allow determinations to be made of the kind and amount of the atmospheric impurities from a sample taken under conditions and at a point or points prescribed by the Department.
(e) The Department may from time to time take samples of solvents used in any drycleaning equipment or systems.
EQUIPMENT AND OPERATING CONDITIONS FOR CLASS II, III
AND IV PLANTS
§ 23.111. Solvents.
(a) No dry cleaning or dyeing machine or system approved by the Department for the use of either a Class I, II, III or IV solvent shall have used therein any solvent other than that for which such machinery has been approved except that Class III solvent may be used in a machine or system approved for Class II solvent. These systems shall be provided with a name plate, setting forth the name of the manufacturer, model number and the type of solvent for which the equipment has been approved.
(b) All transfers of solvents shall be effected through continuous piping and all pipe connections or threaded joints shall be made up with a suitable sealing compound and all outlets or drain lines shall be drained to settling or storage tanks.
(c) No solvent shall be settled or stored in any open or unprotected vessel or tank, except scrubbing, spotting and brushing operations may be carried on in drycleaning or dyeing rooms with the use of not more than three pans or containers, which shall be metallic, and none of which shall contain more than three gallons of solvent. All solvents shall be returned to settling or storage tanks as soon as these operations are completed.
§ 23.112. Heating.
(a) No steam boiler, furnace, steam generator, open flame or incandescent heating device, or exposed fire shall be permitted in any drycleaning, dyeing, tumbler, drying or distilling room.
(b) All heating shall be by steam or hot water system or other system equivalent in safety with pipes, radiators or other devices installed with adequate clearances and properly protected when necessary, against contact with combustible goods or materials.
§ 23.113. Interlocking covers.
(a) Extractors, washers, and tumblers shall be provided with interlocking covers or doors to prevent the inside cylinder from moving when the outer door is open. On extractors, such device shall also prevent the outer door from opening while the inside cylinder is in motion.
(b) Combination drycleaning units, in which the washing and extraction cycles are completed within the same enclosure, shall be provided with splash proof doors, or covers, with interlocking means to prevent cylinder rotation, under power, except for inching at slow speed, when doors or covers are open. During the extracting cycle the automatic mechanical or electrical interlock is designed to prohibit both operating the machine while the cover is open and opening the cover before the basket comes to rest.
§ 23.114. Approval.
(a) No machinery, equipment or system shall be used in any drycleaning and dyeing plant unless the machinery, equipment or system has been approved for use in the dry cleaning and dyeing plant by the Board.
(b) To secure approval of a drycleaning system or equipment, a petition shall be made to the Department of the Board in Harrisburg, Pennsylvania. The petition shall be accompanied by photographs or cuts, complete operating instructions, and copies of Underwriters’ Laboratory, Inc. approval if the approvals are available.
§ 23.115. Ventilation.
(a) A mechanical system of ventilation shall be installed in drycleaning areas and provided with means for remote control. Mechanical systems of ventilation shall have sufficient capacity to insure complete and continuous change of air in drycleaning rooms once every 3 minutes. The ventilation system shall operate automatically when any drycleaning equipment is in use. The ventilation system shall be automatically shut off upon operation of the fire protection or detection systems.
(b) Drying tumblers and drying cabinets shall be ventilated to the outside air by means of properly constructed pipes or ducts connected to an exhaust fan of sufficient capacity to remove all dust, vapors or lint generated by the process. The fan shall be properly housed and so interlocked as to insure operation while the drying tumbler is in use. The fan spiders, blades or running rings shall be constructed of nonferrous metal. In no case shall the fan motor be mounted within the ventilating duct.
§ 23.116. Fire extinguishers.
Fire extinguishers of a type and size approved by the Department shall be provided for each 500 square feet of floor space, or when separate rooms of less than 500 square feet of floor space are maintained, one extinguisher for each room. At least one 2 1/2 gallon approved foam type fire extinguisher shall be provided in any case.
§ 23.117. Unfired pressure vessels.
Unfired pressure vessels shall be built according to the requirements of Chapter 3a (relating to boilers and unfired pressure vessel regulations).
CLASS II AND III PLANTS—ADDITIONAL REQUIREMENTS
§ 23.121. Fire protection devices.
(a) As a means of fire extinguishing in any drycleaning, dyeing, tumbler or drying room, the rooms shall be equipped with steam pipes which shall be separate from and other than the pipes used for heating or power and shall be located near the ceiling. In these pipes there shall be not less than two openings for each room, all of which shall point toward the ceiling. The steam supply for these pipes shall be continually available for service while the plant is in operation and shall be sufficient to completely fill the room space in less than one minute. An outside screw and yoke valve shall be placed in the steam service lines or other lines outside of these rooms, which shall be accessible for operation in case of fire.
(b) An approved system, using a fire detergent chemical or gas or an approved sprinkler system may be installed in lieu of a steam extinguishing system.
(c) A steam fire protection system shall be extended and connected to all washers and tumblers so that the fire extinguishing agent may be admitted to the interior of the machine. The equipment shall provide a steam jet not less than 3/4 inch from a continuously available steam supply at a pressure not less than 15 pounds per square inch.
§ 23.122. Grounding.
The cylinders and shells of all drycleaning or dyeing machines or drying tumblers and the cabinet walls of all drying cabinets shall be permanently and effectively grounded to mitigate danger from static electricity. The grounding of the cylinder in each case shall be through the trunnion shaft.
§ 23.123. Lighting and fixtures.
Lighting shall be by electricity employing incandescent lights. All wiring shall be in rigid conduit installed in accordance with the provisions of Chapter 39 (relating to safety standards—general). Lighting fixtures, switches, communication and signalling equipment, other fixed portable devices, and all motors approved for such installations shall be of the explosion-proof type for Class II installations. Requirements for Class III drycleaning machinery are similar to those of Class II with the exception that explosion-proof motors and light fictures are not required for the Class III drycleaning machinery.
CLASS IV PLANTS—ADDITIONAL REQUIREMENTS
§ 23.131. Equipment.
(a) Fans. The fans required by this subchapter for every drycleaning, dyeing, tumbler or drying room shall be of sufficient size or number to prevent concentrations of fumes above 50 parts per million of atmosphere for carbon tetrachloride systems or 200 parts per million of atmosphere for perchlorethylene and similar types of systems.
(b) Electrical. Lighting shall be by electricity. All electrical equipment, devices, and wiring shall be in rigid conduit installed in accordance with the requirements of Chapter 39 (relating to safety standards—general).
(c) Automatic indraft. Class IV systems shall have an automatic indraft of air with sufficient negative pressure to overcome the effects of the overhead exhaust fan. It is recommended that this indraft of air go on automatically at any time the loading door is open, whether or not the portion of the cycle is such that the door is open or closed. As a substitute for the automatic operation of the indraft at times other than the prescribed door-opening times, a visual and audible alarm may be used to indicate that the machine is not being operated properly.
(d) Safety valve. On machines utilizing steam pressure, an approved type safety valve shall be installed on the low pressure side of the steam-reducing valve. In no case may the valve be adjusted for a pressure higher than the design pressure of the equipment.
(e) Machine exposure. Where members of the public are customarily admitted to the vicinity of the drycleaning machine, only the front or customer side of the drycleaning machine shall be exposed in the customer area. The working or maintenance portion of the equipment shall be separated from the front of the machine by a solid partition.
§ 23.132. Spotting and scrubbing.
The use of any flammable solvent for brushing, scouring, scrubbing, soaking, flame-proofing and water-proofing is prohibited. The use of these fluids for spotting purposes shall be limited to 1 gallon with storage in and application from an approved safety can.
SOLVENT TANKS
§ 23.141. General requirements.
(a) Underground solvent storage tanks. Underground storage tanks for Class II and Class III solvents shall be placed at least 2 feet apart, not less than 2 feet below the surface, not less than 2 feet from foundations and footings, and entirely surrounded by clean earth or sand well tamped in place. All tanks shall rest on a 6 inch concrete pad. The limit of individual tank capacity as shown in the table under subsection (b) may not be exceeded without the approval of the Department.
(b) Construction. Horizontal tanks used for the storage of volatile or flammable solvents shall be made of galvanized steel, open hearth steel or wrought iron of a minimum gauge United States Standard, depending upon the capacity as given in the following table:
Minimum Thickness Material Capacity Gauage Equivalent Pounds per (in gallons) Gauge (in inches) Square Foot 1 to 560 15 5/64 3.125 561 to 1,000 12 7/64 4.375 1,101 to 4,000 7 3/16 7.50 (c) Joints. All joints of tanks shall be riveted and caulked, welded or brazed, and shall be thoroughly and effectively covered with asphaltum or other nonrusting paint or coating.
(d) Ventilation. All storage tanks for Class II, III and IV solvents shall have at least a 1 1/4 inch vent pipe and not less than 1 1/2 inches for tanks over 3,000 gallons, run from the top of the tank to a point terminating in the atmosphere, without trap, which shall end at least 12 feet above level or source of supply, suitably supported and in a location remote from fire escapes and not nearer than 3 feet measured horizontally and vertically from any window or other opening. The tank vent pipe shall terminate in a gooseneck or other approved vent protected in the outer end by a 30 by 30 mesh brass or equivalent wire screen.
(e) Filling pipes. The end of the filling pipe for all underground storage tanks shall be carried to a suitable location outside of any building, and shall be provided with a lock, or equivalent protection, which shall be kept securely locked or closed except during filling operations. This filling pipe shall be closed by an approved cap or plug and, if it is located in a driveway or other places subject to vehicular traffic, set in an approved steel box with cover or otherwise suitably protected to prevent damage to it. A self-closing liquid tight cover shall be required on all inside gauge openings. No gauge opening shall be located below the grade floor but shall be at least one foot higher than the point of fill.
(f) Inside above ground tanks. Class II, inside above ground tanks may not exceed 550 gallons and the individual tank capacity may not exceed 275 gallons except that treatment tanks or purifiers may not exceed an individual capacity of 350 gallons and shall in no event exceed in capacity any individual storage tank to which they may be connected. Class III clean solvent tanks, dirty solvent tanks, extractor drain tanks, fillers and other such containers shall have an individual capacity not in excess of 275 gallons.
§ 23.142. Fuel oil storage tanks.
(a) The main supply tank of oil-burning boilers or heating equipment shall be located outside of the building. If it is located in the building, it shall be buried at least 2 feet underground or located within a fireproof enclosure of at least 12 inches in thickness, six of which shall be of sand solidly tamped and the other six of concrete. The sand shall be between the tank and the enclosure. The fuel tank shall be located at least 15 feet away from the heating plant, 2 feet from all foundation footings, and shall be filled and vented outside the building.
(b) The requirements of subsection (a) apply if the storage tanks for fuel oil, when not more than two tanks of 275 gallons each are used, need not be located outside the building or in a fireproof enclosure when automatic stop valves are provided so that the oil does not flow except when the blower is running and the oil is in combustion, and the tanks are located not less than 7 feet from the furnace. Fuel oil supply tanks shall not be installed in or under the drycleaning room.
§ 23.143. Shipping drums or containers.
Class II and III solvents in individual shipping drums or containers shall not be stored in any building containing a cleaning plant, public assemblage or building used for living, housing or dwelling purposes, but shall be stored in a one story building without basement, having masonry walls properly vented and located in a reasonable distance from these buildings. These drums or containers shall be protected from the sun and other heat producing devices or equipment.
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