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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Karst: A geologic formation of irregular limestone deposits with sinks, underground streams, and caverns.

Leachate: Water that collects contaminants as it trickles through wastes, pesticides or fertilizers. Leaching may occur in farming areas, feedlots, and landfills, and may result in hazardous substances entering surface water, ground water, or soil.

Light Non-Aqueous Phase Liquid (LNAPL): A non-aqueous phase liquid with a specific gravity less than 1.0. Because the specific gravity of water is 1.0, most LNAPLs float on top of the water table. Most common petroleum hydrocarbon fuels and lubricating oils are LNAPLs.

Lower Detection Limit: The smallest signal above background noise an instrument can reliably detect.

Lower Explosive Limit (LEL): The concentration of a compound in air below which the mixture will not catch on fire.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Abbreviations & Acronyms:

BTEX:  Benzene, Toluene, Ethylbenze and Xylenes (typical VOC parameters for assessment of hydrocarbon contamination).

CofA:  Certificate of Approval (license issued by MOE for a specific system or process).

DRO:  “Diesel” Range Organic

EPA:  Environmental Protection Act

GAC:  Granular Activated Carbon (i.e. filter media for treatment of hydrocarbon contaminated air or water).

GRO:  “Gasoline” Range Organic

HO:  “Heavy Oil” Range Organic

IAQ:  Interior Air Quality

MDL:  Method Detection Limit.  (i.e. The lowest detectable level of a given parameter, by laboratory analytical instruments).

MOE:  Ministry of the Environment (Ontario)

MTU:  Mobile Treatment Unit (employed by D.L. Services for treatment/control of contaminated ground and surface water).

PHC: Petroleum Hydrocarbons

PID:  Photo-ionization Detector

SVOC:  Semi-Volatile Organic Compound

SWL:  Static Water Level

TPH:  Total Petroleum Hydrocarbons

TSSA:  Technical Standards and Safety Authority

VOC:  Volatile Organic Compound
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