Open path analyzer

Open path analyzer means an automated analytical method that measures the average atmospheric pollutant concentration in situ along one or more monitoring paths having a monitoring path length of 5 meters or more and that has been designated as a reference or equivalent method under the provisions of part 53 of this chapter.

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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