Enclosure (1) TO COMDTINST 16478.12
Demonstration Battery Removals
In addition to the investigations at the prototype sites, batteries were removed at
35 AtoNs. Areas previously covered by battery piles were sampled to assess the
residual mercury levels in sediments.
MEASURES AND CRITERIA
The data obtained during the prototype site investigations were compared against the
following criteria: 1) differences from site specifc background levels or background
levels established by local or state authorities, or 2) levels above local or
nationally established levels that could indicate adverse effects.
The specific measures used were:
Air
Safety Administration criteria for permissible exposure limits (PELs). The PEL for
mercury is .05 mg/m3.
Sediments
Background and comparison levels:
collected at unlighted AtoNs.
the perimeter of the AtoN sampling field (20 meters from the base of the AtoN),
regional background levels established states or other local investigations,
NOAA National Screening Guidelines:
low (ER-L), median (ER-M)
State of Florida and Washington Criteria:
No effects (NOEL) and
Probable Effects Levels (PEL),
Methyl mercury in sediments: comparisons to established background levels based
upon the literature, percentage variation among local comparison stations.
Biota
Background and comparison levels:
biota taken at comparison stations (unlighted AtoNs),
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