40 C.F.R. § 86.526-90
Calibration of other equipment.
Cite as 40 C.F.R. § 86.526-90 (2026)
Other test equipment used for testing shall be calibrated as often as required by the manufacturer or as necessary according to good practice. Specific equipment requiring calibration is the gas chromatograph and flame ionization detector used in measuring methanol and the high pressure liquid chromatograph (HPLC) and ultraviolet detector for measuring formaldehyde. [54 FR 14551, Apr. 11, 1989]