(1) A licensee shall maintain a record of radiation surveys of treatment units made in accordance with WAC 246-240-390 for the duration of use of the unit.

(2) The record must include:

(a) The date of the measurements;

(b) The manufacturer's name, model number and serial number of the treatment unit, source, and instrument used to measure radiation levels;

(c) Each dose rate measured around the source while the unit is in the off position and the average of all measurements; and

(d) The signature of the individual who performed the test.