regulations, except for boiler and pressure vessels in nuclear facilities subject to Section 2a, and boilers and pressure vessels located in cities of more than 500,000 inhabitants.

storage of compressed or liquefied gases when constructed in compliance with specifications of the Department of Transportation and charged with gas or liquid, marked, maintained, and periodically requalified for use, as required by appropriate regulations of the Department of Transportation.

under the rules of other State authorities and used for carrying passengers or freight.

railroads and used directly in the operation of trains.

jurisdiction of the Department of Natural Resources and located on mine property.

used solely for agricultural purposes.

boat, tractor, or stationary engine constructed and maintained as a hobby and not for commercial use, that have an inside diameter not exceeding 12 inches and a grate area not exceeding 1 1/2 square feet, provided they are constantly attended while in operation and are equipped with a water level indicator, pressure gauge, and a safety valve of adequate capacity.

the Illinois Fertilizer Act of 1961.

gas regulated under the Liquefied Petroleum Gas Regulation Act.

operated at a pressure not in excess of 15 pounds per square inch gauge (psig) and having a rating not in excess of 200,000 B.T.U. per hour input.

not in excess of 30 psig and having a rating not in excess of 200,000 B.T.U. per hour.

residences or in multi-family buildings having fewer than 6 dwelling units.

with oil, gas, or electricity when none of the following limitations are exceeded:

gallons.

flash into steam when released directly to the atmosphere through a manually operated nozzle provided the following conditions are met:

space.

inch.

gallons.

Fahrenheit.

pressure for domestic supply purposes, including those containing air, the compression of which serves only a cushion or airlift pumping function.

exceeding 15 psig with no limitation on size.

when not located in a place of public assembly.

located in a place of public assembly.

diameter of 6 inches with no limitation on pressure.

of minerals, chemicals, or organic or inorganic particles from water by means other than application of heat including, without limitation, water softeners, water filters, dealkalizers, and demineralizers.

traction engines built prior to 1955 that were constructed or operated in compliance with the Federal Locomotive Inspection Law and are in the permanent collection of a museum or historical association are exempt from the requirements of subsection (c) of Section 10 upon proof of such construction or inspection being furnished to the Board.