Enclosure (1) TO COMDTINST 16478.12
The section "Results - Demonstration Battery Removals" states that at two
locations in Tampa Bay, where a large number of broken batteries were removed,
sediment levels exceeded 5 mg/kg (total mercury). Furthermore, it is believed
that these sediments contained matter previously attached to the outside of
the batteries and lost during battery removal. This suggests that battery
removal should be undertaken in a manner that will minimize the loss of
attached sediment and biota during removal.
Although it is prudent to remove the subject batteries from the AtoN sites, a
phased removal, subject to the availability of funds, is consistent with the
low contaminant levels observed.
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