Calibration of survey instruments.

(1) A licensee shall calibrate the survey instruments used to show compliance with this section and WAC 246-240-587 before first use, annually, and following a repair that affects the calibration. A licensee shall:
(a) Calibrate all scales with readings up to 10 mSv (1000 mrem) per hour with a radiation source;
(b) Calibrate two separated readings on each scale or decade that will be used to show compliance; and
(c) Conspicuously note on the instrument the date of calibration.
(2) A licensee may not use survey instruments if the difference between the indicated exposure rate and the calculated exposure rate is more than twenty percent.
(3) A licensee shall retain a record of each survey instrument calibration in accordance with WAC 246-240-566.
[Statutory Authority: RCW 70.98.050. WSR 06-05-019, ยง 246-240-104, filed 2/6/06, effective 3/9/06.]
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