(a)  The licensee shall maintain sufficient calibrated and operable radiation survey instruments at each field station and temporary jobsite to make physical radiation surveys as required by this Section and by Section .1600 of this Chapter.  Instrumentation shall be capable of measuring beta and gamma radiation from 0.1 milliroentgen per hour through at least 50 milliroentgens per hour.

(b)  Each radiation survey instrument shall be calibrated:

(1)           at intervals not to exceed six months and after each instrument servicing;

(2)           at energies and radiation levels appropriate for use; and

(3)           so that accuracy within plus or minus 20 percent of the true radiation level can be demonstrated on each scale.

(c)  Calibration records shall be maintained for a period of three years for inspection by the agency.


History Note:        Authority G.S. 104E‑7; 104E‑12(a)(1);

Eff. June 1, 1989;

Amended Eff. January 1, 2005; January 1, 1994;

Transferred and Recodified from 15A NCAC 11 .1307 Eff. February 1, 2015.