~ 50 -
the value selected by Kathren be used when.the RF is unknown
to determine the ambient ground contamination standard.
Apolying an RF=10-4 m+
to the ambient M2Ca standard
recommended in the previous section, we obtain a maximum permissible surface contamination (MPSC)
c
of 9x10
-8
"7
2
uCi/me.
’
B6
level for hot particles
.
.
2
This is roughly 1 hot particle/m.
In areas where an RF greater or less than 1074 ml could
be shown to apoly, the MPSC could be altered aporopriately.
E,
As Low as Practicable Hearinc
It is
to be understcod that the abova recomtendations
co not represent endorsement on our vart of the ris
ct
ct
I
innerent in the existing rad ation protec lon guidelines
upon which these recommendations are basec.
Rather, we offer
}-
tnese
‘3
Let)
yn
tha
racticabls.
Therefore, we
guidelines Se incorporated
1--
recermend
as
Ltt
Further
ne
cr
spelow these guicel
od
tne admonition that the exposures should be kept as far
mio the existing regulations without delay and that the
limits for exnssure to not particles.
24, This value is derived as follows:
The recammendad MPCa
For not partistes is 9x190713 uci/ml which corressonds to
3x19712 uciyed.
The maximum ground cancamination level, using
pralo74 m4, is 9xlovl2y1o-4 = OxLlo-? utivn2.
wee cepwee
OR yt ay ER
eee
ne ke
ern tee gen ene foPEE ele
eT ee
fe
ag
er gest
ROR GS Mp ar a pee Om Vr ET
‘ .