CSN

Chemical Speciation Network (CSN) includes Speciation Trends Network stations (STN) as specified in paragraph 4.7.4 of appendix D of this part and supplemental speciation stations that provide chemical species data of fine particulate.

Source

40 CFR § 58.1

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Scoping language

As used in this part, all terms not defined herein have the meaning given them in the Clean Air Act.

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