samee ae tnt ws
:
tem ee ETT Peta ee
.
ep weet one
ease oe ae Ptegee oat e
~ 45 -
average and maximum doses.
The Federal Radiation
Council sugyests the use of the arbitrary assumption
that the majority of individuals do not vary from the
average by a factor greater than three.
Thus, we
recommenc ‘ne use of 0.17 rem for yearly whole-body
exposure tI average population groucs.
(It is noted
that this cuide is also in essential agreement with
current rocommendations of the NCRP and the ICRP.)
It is critical that this guide be apolied with reason
and judgement.
Especially, it is noted that the use
of the average figure, as a substitute for evidence
concerning
the dose
to individuals,
is
permissible
only when there is a probability of aspreciable homogeneity concerning the distribution of the dose witnin
the population included in the average. /?
Strict adnarence to these guidelines implies that
the ambient air standard snould be zero particles, 99
'd
While a variety o ro suggestions could be pro osed, we recommend
a slight deviaczion from tnese guidelines and the acceptance
of the Gisproccriionate risk implicit in the 0.2 varticla
standareé.
This is a workable solution since best estimates
ef lung burdens can be fractional quantities.
Thus, we
recommend thai tn= MPLP3 for menbers of the sublic be 0.2
N
~~
~
Gg
t=
it
0
Go
he
u
a
1f
~
(D
'g
oO
i
oy
cy
km fu
Ou
'
2
tt
ry tg
etoal
wm
‘f9
public be 0.97 ot particles, a factor of 3 less than the
rd on a 1/10,909 risk per
“W933 would have
would not 2xist.
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ome
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