40 CFR § 98.327
Records that must be retained
June 9, 2020
In addition to the information required by §98.3(g), you must retain the following records:
(a) Calibration records for all monitoring equipment, including the method or manufacturer's specification used for calibration.
(b) Records of gas sales.
(c) Logbooks of parameter measurements.
(d) Laboratory analyses of samples.
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