Table 2. Analytical data from cistern water sampled on June 21, Island (Bikini Atoll). Chemicals (ppm) 7 Bldg. = Cl 5 35.6 6.4 OL 8.4 24 23.1 3.8 O.1 9.1 10.5 19.8 1.3 School 21.5 O 0.2 6.0 18 16 SO, Sr K Ca * on Bikini Radionuclides (pCi/litre)® Meg 7 SY 0 239,24 3952 Ou 1.201) 7.9 x 10°? (5) 1.8(2) 1.9(2) 1.7(2) 1.42(7) 13.7 x 107? (4) 3 1376. 8.5 26.7 2.2 2.5(1) The values in parentheses are of the listed values. ai Na 1975, 0.7 29.0 x 107 the l-o counting errors expressed * 239,240 (2) as percentages present levels are also similar to average the 1971-1973 water concentrations 17 £Ci/litre in the cistern water is in Lake Ontario.*“ ereater than the average surface levels of 906, are less These present in the Bikini wells than 204 of Pu concentration of groundwater concentrations at Eneu the drinking- (9 FCi/litre) but much lower than the water Limit of 10 pCi/litre estab- average concentration (44 f£Ci/litre) lished by in Bikini surface groundwater. the U.S. Public Health service for domestic supplies and Examination of the radionuclide are 0.4% of the FRC limit of 300 concentrations in the cistern water pCi/litre. and comparisons with other data The Pao. levels are higher than the 1974 tap water con- reveal that the largest percentage centrations for New York City but of the radioactivity in the water are only 0.014 of the maximum per- must originate, surprisingly, from mLSSible concentration of 20 n€i/ sources other litre based on FRC guidelines. Consider first average concentration of The 239,2 39, 4000 in the cistern water is less than worldwide fallout. that the 137 66/7 osy ratio varies between 0.93 and 2.27 than in the three samples. One would 0.0003% of the FRE concentration expect that fallout depositions of guideline. these two radionuclides would be Interestinely, the -—g- Wm scioict