40 CFR 98.220 - Definition of source category.

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§ 98.220 Definition of source category.
Link to an amendment published at 81 FR 89259, Dec. 9, 2016.

A nitric acid production facility uses one or more trains to produce weak nitric acid (30 to 70 percent in strength). A nitric acid train produces weak nitric acid through the catalytic oxidation of ammonia.

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United States Code