GLOSSARY

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

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DIFFERENTIAL PRESSURE

The measurement of differences in pressure in one area compared to another; e.g., outside area compared to pressure inside a building, or inside containment compared to that outside.


DILUTE

Making a substance less concentrated by the addition of gas or liquid.


DILUTION RATIO

The ratio at which a cleaning agent is diluted in water for its recommended effective use, often expressed as a number such as 1:128, referring to parts of chemical dissolved in parts of water (e.g., 1:128 = 1 part chemical to 128 parts water)


DILUTION VENTILATION

Airflow designed to dilute contaminants to acceptable levels; also referred to as general ventilation or exhaust.


DIMINISHED VALUE (DIMINUTION IN VALUE)

Loss of a material_s or properties tangible or intangible (e.g., warranty) worth.


DISINFECT

To free from infectious materials by destroying harmful micro organisms.


DISINFECTANT

Any chemical or physical process used on objects that destroys more than 99% of unwanted micro organisms Disinfectants may not kill all spores, on inanimate surfaces. Descriptions of products of this type generally include the suffix _-cide.


DISPOSAL

Final placement or destruction of wastes.


DISSEMINATION

For bio pollutants, the way and means of leaving a reservoir and coming in contact with a human receptor.


DISTRESSED

Damage, weakness or deterioration relating to the character, composition or use of an object or component.