eae ‘ Fspataaalg Ta aeel tliatPte ee ~ “132 an . ea Lat as 2"Pbh AND 7!9Po IN TISSUDS OF SOME ALASKAN RESIDENTS samples andi cai oou bones are given in Vables (S8.D.), The data in Table 4 indicate that lichens 3 and 4. respectis ly, Uhe?”’Pbresultshave been collected prior to 1951 had #!°Pb concentrations concentrations at the time of collection and the anaverage of 16 + 12 pCi/g (S.D.). Thus, there collection. has beon subtracted. due to nuclear testing activities. corrected for rclivactive decay to reflect the 210Pb, contribu cl by the 28Ra since the time of The 29ph level, in 14 Alaskan lichen samples collected over the last ¢ yr have been report- ed.792) These varied from 3.44 to 69 pCi/g dry weight with an average of 13 +8 pCi/g ranging from 3.41 to 34.5 pCi/g dry weight with was no apparentincrease in #!0Pb concentration Further, the range of values (9.68~39.5 pCi/g) for lichen samples collected at Anaktuvuk Pass in 1949 bracket the 14.9 pCi/g recently reported from the same area." Table 3s. Concentrations ofPb and ?**Ra in Alaskan lichen samples collected before 1951 Sample Date Location collected 210Ph, *pCi/et 2tRa, pCi/gt 1948 17.3 + 0.2 0.050 + 6.011 1948 12,2 + 0,1 0.045 + 0.010 1919 35.0 + 0.2 0.043 -- 0.010 Anaktuvuk Pass 1949 9.68 + 0.12 0.125 + 0.009 Parmetia omphalodes Anaktuvuk Pass 1949 39.5 4+ 0.2 0.028 +. 0.004 Cetraria deliset Wainwright 1949 12.2 4+ 0.1 0.034 + 0.011 Cladania subulata Cape Nome 61 287N, 165°W 1923 7.30 + 0.10 0.122 + 0.008 Cladonia uncialis Noorvik-on Kobuk River 66° 19°N, 161°O'W Cape Nome 1923 3.41 + 0.06 1923 6.2 + 0.10 0.032 + 0.006 ; 0.031 + 0.006 Cetraria islandica Point Barrow 7I°19'N, 56°40’ W Point Barrow FIPLON, 56°40°W Anaktuvuk Pass 68° 10°N, 51°5 PW Getraria richardsonii Alectoria nitidula +Cladinia sp. Sphacropharus globosus 68° 10°N, 5L°S UW GB°LO'N, SIPS PW 70° 39°N, 160°W Cladonia cenotea 64°28'N, 165°W * Activity corrected to date of collection and the ?**Ra contribution subtracted. t Dry weight (dried at 90°C for 24 hr). Table 4, Concentrations of *°Pb and ***Ra in caribou bone collected before 1951 Sample number Location collected Date collected Age Bone type 7°Pb( pCi/g)* **Ra( pCi/g) OC-01 Longhead Island 8-16 Adult Metatarsal 15.4 4.0.2 0.2! + 0.01 OC-02 Ellesmere Island 3-35 Adult Occipital 8.08 + 0.13 0.25 + 0.01 OcC-03 Teslin Dist., Yukon Terr. GU°2’N, 132°50°W Netilhng Lake, Baffinijand 66°26°N, 7ISW Near George R., Quebec J1-12 Adult Manible 5.4 + 0.17 0.24 + 0.0! 8-25 Fawn Ulna 1.51 + 0.08 0.065 + 0.006 9-49 Fawn Scapula 2.08 + 0.12 0.11 + 0.01 OC-06£ OC-05 77°20'N, 105°W TBO3N, BOW 53°30'N, 66 12’W * Activity corrected to date ofcollection and the #*Ra contribution subtracted. — Jaa ~~ seat _ _—s ite