§ 835.402 Individual monitoring.
§ 835.403 Area monitoring.
(a) Measurements of radioactivity concentrations in the ambient
air of the workplace shall be performed as follows:
(1) Air sampling shall be performed in occupied areas where,
under typical conditions, an individual is likely to receive
an annual intake of 2 percent or more of the specified ALI values.
For a given radionuclide and lung retention class, the ALI is
the product of the DAC listed in appendix A of this part and
the constant 2.4x10^9 ml. Samples shall be taken as necessary
to detect and evaluate the level or concentration of airborne
radioactive material at work locations.
(2) Real-time air monitoring, using continuous air monitors
as defined in § 835.2, shall be performed in normally occupied
areas where an individual is likely to be exposed to a concentration
of airborne radioactivity exceeding 1 DAC as specified in appendix
A of this part or where there is a need to alert potentially
exposed individuals to unexpected increases in airborne radioactivity
(3) For the airborne radioactive material that could be encountered,
real-time air monitors shall have alarm capability and sufficient
sensitivity to alert potentially exposed individuals that immediate
action is necessary in order to minimize or terminate inhalation
(b) Monitoring of radiation in the workplace shall be performed
using stationary (area) or portable radiation instruments, or
a combination thereof. The instruments shall be readily available
and shall be capable of measuring ambient radiation dose rates
for the purpose of controlling radiation exposures.
§ 835.404 Radioactive contamination control and monitoring.