New Brunswick's Clean Air Act - Glossary

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Halogens
A group of very reactive elements, which include: fluorine, chlorine, bromine, and iodine. They react with metals to produce salts and also react readily with organic compounds.

Halons
Bromine or chlorine containing compounds with long atmospheric lifetimes, the breakdown of which, in the stratosphere, causes depletion of the ozone layer. Halons are used in fire fighting as fire suppressants.

Hammermill
A type of impact mill or crusher in which materials are reduced in size by hammers revolving rapidly in a vertical plane within a steel casing. Also known as a beater mill.

Hardcopy Recording Device
Is a device used to record required data in a chart recorders form on paper.

Heat Pump
An apparatus for heating or cooling a building by transferring heat by mechanical means from, or to a reservoir (such as the ground, water or air) outside the building.

Heavy Fuel Oil
A term usually used in the Crude Oil Refining sector to describe the oil that consists of heavier hydrocarbon molecules or large chains. The heavy fuel oil is typically the bottom residuals of the distillation towers and cracking units in the refining process. Also called No.6 Fuel Oil or Bunker C.

Hexane
A water insoluble, toxic, flammable, colourless liquid with a faint aroma. It is mainly used as solvent, paint diluent, alcohol denaturant, and freezing-point depressant.

High Pressure Catalytic Process
Refers to a process sometimes used in the Crude Oil Refining sector. The process operates at elevated pressures using a catalyst.

Hi Volume Monitor
Is an ambient air quality monitor that is specifically used to collect particulate matter in the air at a specific location generally at ground level. These monitors are required to be set up and operated at most Class 1 sources to provide data on the level of impact of particulate matter from the source to the ambient air quality environment.

Hog Fuel
A term for wood waste fuel widely used in the Pulp and Paper industry to fuel boilers. It includes but is not limited to the following constituents: bark, sawdust, shavings and reject chips.

Hog Fuel Boiler
Refers to a boiler that is fuelled with Hog Fuel.

Hog Fuel Boiler Precipitator
Refers to a control device before the stack of a hog fuel boiler that collects the particulate matter in the flue gas being emitted from the combustion reaction. Also see Electrostatic Precipitator.

Hoppers
A funnel-like chamber with an opening at the top for loading, and a discharge opening at the bottom for bulk-delivering material such as limestone, coal, or aggregate. In another context means a high-speed machine that uses hammers and cutters to crush, grind, chip or shred solid waste.

Hot-Air Flash Dryers
A dryer that operates oil-fired or woodwaste fired burners to create hot air that is in direct contact with the product to be dried. The hot air flashes off the moisture in the product being dried. The product stream is separated from the hot air typically using cyclone or baghouse filter. This type of dryer is typically found at particle board and asphalt plant facilities.

Hot End Coaters
Refers to the surface coating application in the forming and finishing stage of glass manufacturing. The coaters are devices used to apply the surface coating to the finished glass. The coaters are located at the hot end of the process of annealing and forming of the glass.

Hot End Coating Area
The area where the coating application is undertaken in the finishing stage of the glass manufacturing process.

Hourly Mean Rate of Discharge
The hourly average discharge rate of a specific contaminant from a source.

Hourly Quality -Assured Sulphur Dioxide Data
Refers to the hourly continuous emission monitoring data associated with a sulphur dioxide monitor and being certain that the data is accurate based on calibrating, editing, record keeping and statistical techniques to filter out outliers, etc.

Hydrator Plant
Refers to a facility that adds water to a process stream to allow a hydration reaction between the water and the process stream. A typical application of hydrator plants is in the hydrated lime manufacturing industry. Limestone excavated from the ground is calcined, to form calcined lime. The calcined lime is then hydrated in the hydrator plant to form hydrated lime. Also see Calcined Lime.

Hydrocarbons
Chemical compounds that consist entirely or predominantly of carbon and hydrogen.

Hydrogen Chloride (HCl)
See Gaseous Hydrogen Chloride.

Hydrogen Sulphide (H₂S)
A gaseous by-product found in the Oil Refining and Pulp and Paper Industries. Hydrogen Sulphide often exhibits a characteristic smell like rotten eggs. As per the New Brunswick Regulation 97-133, Schedule B, the Maximum Permissible Ground Level Concentration in micrograms per cubic metre of air for H₂S is set at fifteen for an averaging period of one hour, and five for twenty four hours. Also see Total Reduced Sulphur.

Hydrogen Wash Tower
Refers to a tower like device used to separate the moisture vapour picked up by the hydrogen during the chlorine and caustic generation process.