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RADIOLOGICAL CLEANUP OF ENEWETAK ATOLL
LUJOR SOIL CLEANUP
Thefinal island to undergosoil cleanup, exclusive of Runit, was Lujor
It had been the site of the Inca shot during Operation Redwing. Incg
produced heavy local contamination due, in part, to involvement ofa large
amount of pierced steel planking placed at the site. The 1972 Radiologica;
Surveyidentified a “‘hot spot’’ some distance from the Inca GZ which haq
plutonium levels as high as 530 pCi/g and strontium-90 levels in the 35 to
140 pCi/g range®® (Figure 7-48).
*
ot
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on
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Jovi. Tt
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=+
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HOT SPOT (NVO-140)
ERO: 890 pCl4e
B00: 160 ptig
coeo: 70 pci
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soe oe
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FIGURE 7-48. SITE LUJOR (PEARL) SHOWING LOCATION INCA EVENT
AND “HOT SPOT.”
In the 1972 survey, it was estimated that soil cleanup on Lujor would
involve only 600 cubic yards of soil over 40 pCi/g. However, based on the
1977-78 characterization by DOE-ERSP, the estimate for soil cleanup to
agricultural levels (80 pCi/g) presented at the 4 May 1978 conference was
24,700 cubic yards, adjusted by the Treat Factor to 49,400 cubic yards. No
decision on Lujor soil cleanup was madeat that conference. It was held in
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abeyance until actual data could be obtained on alternative cleanup
techniques and on cleanuprates of the higher priority islands (Aomon,
Enjebi, Boken, etc.). The scope of effort changed markedly when Lujor
was re-IMPed after debris cleanup. Contamination levels had been
reduced below 160 pCi/g. Much of the contamination apparently had been
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