Sec. 255.809. Leaks: instrument sensitivity verification

Latest version.

Each instrument utilized for leakage surveys and investigations must be tested against a known sample or in accordance with the manufacturer's recommended instructions as follows:
(a) after any repair or replacement of parts other than normal maintenance;
(b) once every three months for CGI's and solid-state leak detection instruments and yearly for hydrogen flame ionization (HFI) instruments; and
(c) any time it is suspected that the calibration has changed.

                    
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