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equivalent release concentration (ERC) definition

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in gas enclosure testing, the theoretical concentration of a process gas that would be measured outside an enclosure in the event of a process line failure. The ERC can be expressed as a percentage of the threshold limit value (TLV) or permissible exposure limit (PEL) of the process gas . [SEMI F15-93]

See also:

exception condition definition
evanescent wave definition
excimer definition
Exogenous definition
epi profile slope definition