TABLE V 
SUMMARY OF PERMISSIBLE CONCENTRATION OF SELECTED 
RADIONUCLIDES IN DRINKING WATER; EDIBLE MARINE 
PRODUCTS; AND SEA WATER 
1. 23 3: 4. G 
Maximum weekly Concentration 
MPC (\c/cc) dose (lc) PFC (uc/gm) factor PSC (c/ml) 
H3 0.2 3.000 2 us ¢ 
C14 3 x 10°3 ase yee 3x! 102 -- = 
Na 24 8 x 1073 120 8 x 102 0.5 1.6 x 107! 
P 32 2x 104 3 2x 10°3 4x 104 5x 10°8 
§ 35 5x 10°3 75 5 x 10°2 5 1 x 10°2 
K 42 1 x 10°2 150 1x 107! 10 1 x 10-2 
Ca 45 5x 104 IPS 5x 10° 10 5x 104 
Cr 51 5 x 102 750 5x 107! = = 
Fe 59 4x 103 60 4x 10% 104 4x 10°6 
Co 60 2x 10° 300 2x 10°! 104* 2 x 10°5 
Cu 64 8 x 10-2 1200 8 x 107! 5 x 108 1.6 x 10-4 
Zn 65 6 x 102 900 6 x 107! 5 x 10° 1.2 x 1074 
Sr 90 8 x 10°7 0.012 8 x 10°6 10 8 x 10°7 
| 131 3 x 10°> 0.45 3x 10% 100 3x 10°6 
Cs 137 1.5 x 10°3 22.5 1.5.x 102 50** 3x 10" 
Ir 192 9x 104 13.5 9 x 10°3 =: = 
1. Handbook 52 values (3). 
2. From MPC and weekly ingestion rate of 15 liters of water. 
. Permissible fish concentration. From maximum weekly dose, and weekly ingestion rate of 1.5 
kg of fish. 
4. The concentration factors for the soft tissues of vertebrates or invertebrates, whichever is 
higher, from Revelle and Schaeffer (5). In all cases, except P 32, figures are for inverte- 
brates; vertebrates are lower by a factor of one half to one tenth. 
*Maximum factor for plankton species. Ketchum and Bowen (in press). 
**Data for soft tissues of oysters. Chipman (unpublished). 
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