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SECTION V. CHARACTERISTICS OF
MONITORING PROCEDURES
501. This section includes con siderations relating to sam pling
p roced u res and the m ethods of laboratory analysis and field
m easurem ents with referen ce to both planned and unplanned
rele a ses. The b a sic concept is that the p roced u res, methods
and instrum ents should be the sim p lest and m ost econ om ica l
required to achieve adequately the d esired ob jective.
A. PLANNED RELEASES
502. Planned releases n orm ally allow sufficient tim e fo r carefu l
p re -op era tion a l planning and training. W herever p ossib le,
the m onitoring p roced u res should be put into effect w ell
before re le a se s are planned in o rd e r to allow opportunity
fo r testing the m ethods in actual p ra ctice.
F ield m easurem ents
503. Many instrum ents are available fo r the d irect m easurem ent
o f the alpha, beta, o r gamma radiation levels in the en viron ­
ment. P a rticu la rly useful and econ om ica l are those that
con sist of a sim ple solid -sta te d osim eter that can integrate
exposu res ov e r long period with no attention.
504. Instruments that continuously m onitor and record levels in
sam ples o f air o r water are useful in sp ecia l ca ses. H ow ever,
levels o f contam ination in the environm ent are often so low
that such d irect m easurem ents are not fea sib le. It is th erefore
alm ost always n ecessa ry to co lle ct sam ples for subsequent
la boratory analysis.
Sampling
505. S election of sam ples must be in con form ity with the ob jectiv es
as defined in Section II.
506. F o r m onitoring p rim a rily d irected toward a ssessm en ts of
population dose care should be taken to obtain representative
sam ples through com positin g of sam ples from a num ber of
so u rces. In som e cases advantage can be taken of certain
sam ple collection program m es already existing in governm ent
agen cies.
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