Five locations were sampled on Edna as part of the Fission Product Data Base Program in support of
the dose assessment (see Section 6.11). Soil from three of the locations was analyzed for 90sr,
Tables 7-1, 7-2 and 7-3 summarize the results for 0-15 em data for 137g, 90s; and 239,240 py,
respectively.
The island average transuranics value reported in the Certification is 33 pCi/gm for surface soil, and
the transuranics classification is Residence.
7.3.6 Edna's Daughter
Edna's Daughter, a tiny islet about 0.5 hectares (ha) in area with a few bits of vegetation, is located
on the reef just north of the Mike event crater. The island has no Marshallese name, and was not
mentioned as existing during nuclear testing activities. Its location suggests that it may have grown
up around throwout from the Mike event. The islet is visible in 1972 aerial photographs, but was not
sampled in the 1972 survey. No data are available on the amount, if any, of exposure to Edna's
Daughter due to fallout from nearby nuclear events. There were no scientific stations, no debris, no
ground zero sites, and no burial areas on Edna's Daughter.
Because of its small size, no IMP measurements were made on the island, nor were any accurate
maps drawn.
However, soil samples were taken at two locations, with two composites at each of
three depths for a total of 12 samples. The approximate locations and the results of the soil
sampling are shown in Figure 7-24 and are summarized in Table 7-4. The highest TRU activity in any
soil sample was 122 pCi/g, so Edna's Daughter met Condition D without any cleanup. This island was
not sampled in the Fission Product Data Base program.
The island average transuranics value reported in the Certification is 103 pCi/gm for surface soil,
and the transuranics classification is Food Gathering.
OCEAN
f
MAGNETIC N
8
APPROX IMATE
HIGH
TIDE
LINE, 1979 iy
stanot
@ STAKE LOCATIONS APPROXIMATE
LAGOON +
DATUM IS MEAN TRU IN pCi/g
EDNA'S DAUGHTER
so
25m
FIGURE 7-24. COASTLINE AND DATA COLLECTION LOCATIONS FOR ISLAND EDNA’S DAUGHTER
231