FED-STD-209E

FED-STD-209 E Airborne Particulate Cleanliness Classes in Cleanrooms and Cleanzones was a federal standard concerning classification of air cleanliness, intended for use in environments like cleanrooms. The standard based its classifications on the measurement of airborne particles.[1]

Cancellation

The standard was canceled on November 29, 2001 by the United States General Services Administration (GSA). The document was superseded by standards written for the International Organization for Standardization (ISO).[2]

gollark: Ew, it has words in it.
gollark: BQN seems good if you like numericy and array-y stuff.
gollark: There should be some stocked in the stock sphere.
gollark: Why not just enter a GTech™ asocietal sphere?
gollark: It's esolangs policy to randomly do so at 57Hz.

References
  1. "FED-STD-209 E AIRBORNE PARTICULATE CLEANLINESS CLASSES". everyspec.com. Retrieved 2016-02-19.
  2. "Federal Standard 209E Cancellation". www.iest.org. Retrieved 2016-02-19.


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