Medical Air Quality

NFPA 99 2018 5.1.3.6.1 (2) indicates that medical air shall meet the requirements of medical air USP. However, Table 5.1.12.4.12.3 does not include nitric oxide and sulfur dioxide as contaminates to be tested for even though they are listed in the USP as contaminates. Can you please help clarify why these are not required to be tested for in NFPA 99?

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