Enclosure (1) TO COMDTINST 16478.12
Eagle Harbor
CH2M HILL conducted a remedial investigation (CH2M Hill 1989) of sediment
contamination in Eagle Harbor, a 2-square-km embayment in central Puget
Sound, on the eastern border of Bainbridge Island. The contaminants of
concern included polynuclear aromatic hydrocarbons and metals with probable
sources including boat repair facilities and other types of shipyard
activities (including Navy ship work during the war), marinas, and an 80-year
old wood-treatment facility. Sediment sampling was conducted over a 1-year
period and included collection and analysis of sediment from subtidal and
intertidal areas using a phased approach. Sediment was collected for
screening-level analysis in a 20-acre area, primarily in areas not included
in prior studies, followed by detailed studies in the subtidal and intertidal
areas of concern and at background sties. Subtidal samples were collected
using a "van Veen grab," and intertidal samples were collected using trowels
and/or shovels. Analyses included VOCs, SVOCs, PAHs, chlorophenols, metals
and conventional analysis (e.g., TOC, grain size), benthic infauna, and
bioassays.
Florida Sediment Survey
Sediment studies were conducted in Florida's coastal waters as part of the
sediment standards program (MacDonald, 1993). The chemical measurements
taken were organized in a database according to 20 general geographic areas.
Samples were collected from the entire coastline, within 1 linear meter of
the seashore.
Lake Martin Sediment Survey
As part of an Administrative Order, sediment samples were collected in a 613-
acre area of Lake Martin, Alabama, to determine whether solids from nearby
WWTP had been discharged (CH2M Hill, 1993b). A total of 43 sediment samples
were analyzed for metals to determine whether sediments contained
constituents similar to the solids from WEPT.
Seal Beach
Seal Beach National Wildlife Refuge Project was a voluntary investigation
conducted for the US Navy (SWDIV 1992). The presence and magnitude of
possible chemical contaminants in sediments and key indicator biota was
studied. A total of three samples were collected in a 20-acre intertidal
zone along the California coastline, to confirm the presence of hazardous
waste contamination. Sample collection was based on a 400-to-500-foot wide
spaced grid system in the 20-acre area.
7
Previous Page
