N.M. Code R. § 20.3.14.1404 – Radiation Survey Instruments

A. Radiation survey instruments used to determine exemptions pursuant to 1403.C [Subsection C., Section 1403 of 20.3.14.1403 NMAC] shall be capable of measuring from 1 microroentgen per hour through at least 500 microroentgens per hour. Laboratory analytical instrumentation used in accordance with 1406 [Section 1406 of 20.3.14.1406 NMAC] must have a radiation detection system with an efficiency such that it is capable of measuring 1000 dpm/100 cm2 on filter paper. The efficiency of portable survey instruments must be such that when cpm is equated to dpm, the 1000 dpm/100cm2 limit is not exceeded.
B. Radiation survey instruments used to make surveys required by this Subpart shall be calibrated to an appropriate standard and operable according to Department guidelines for operability checks on a regular basis.
C. Each radiation survey instrument shall be calibrated:
(1) by a qualified person or by the manufacturer provided the person or the manufacturer is certified by the Department;
(2) at intervals not to exceed twelve (12) months and after each instrument servicing other than battery replacement; and
(3) to demonstrate an accuracy within plus or minus 20 percent.
D. Records of required calibrations shall be maintained for Department inspection for five years after the calibration date.
[8-2-95; 20.3.14.1404 NMAC – Rn, 20 NMAC 3.1.14.1404, Recompiled 11/27/01]