98.157—Records that must be retained.
(a)
In addition to the data required by § 98.3(g), HCFC-22 production facilities shall retain the following records:
(2)
Records documenting the initial and periodic calibration of the gas chromatographs, weigh scales, volumetric and density measurements, and flowmeters used to measure the quantities reported under this rule, including the industry standards or manufacturer directions used for calibration pursuant to § 98.154(p) and (q).
(b)
In addition to the data required by § 98.3(g), the HFC-23 destruction facilities shall retain the following records:
(2)
Records documenting the initial and periodic calibration of the gas chromatographs, weigh scales, volumetric and density measurements, and flowmeters used to measure the quantities reported under this subpart, including the industry standard practice or manufacturer directions used for calibration pursuant to § 98.154(p) and (q).