Table 5. Maximum concentrations of contaminants of concern to NOAA detected in sediment at the Atlantic Fleet Weapons Training Area site (CH2M HILL 2000, 2002a). Contaminant values in bold exceed or are equal to screening guidelines.
|
Contaminant
|
AOC J
|
SWMU 6
|
SWMU 7
|
ERLa
|
|
|
|
|
|
|
|
METALS/INORGANICS
|
|
|
|
|
|
Arsenic
|
<0.76
|
560
|
0.65
|
8.2
|
|
Cadmium
|
<0.07
|
14
|
N/A
|
1.2
|
|
Chromiumb
|
5.4
|
68
|
67
|
81
|
|
Copper
|
18
|
100
|
37
|
34
|
|
Lead
|
4.6
|
140
|
4.1
|
46.7
|
|
Mercury
|
0.022
|
0.21
|
36
|
0.15
|
|
Nickel
|
2.5
|
140
|
0.37
|
20.9
|
|
Selenium
|
1.6
|
540
|
0.53
|
1.0c
|
|
Silver
|
<0.15
|
15
|
N/A
|
1
|
|
Thallium
|
0.84
|
570
|
0.83
|
NA
|
|
Vanadium
|
64
|
170
|
110
|
57c
|
|
Zinc
|
25
|
170
|
54
|
150
|
|
|
|
|
|
|
|
PESTICIDES/PCBs
|
|
|
|
|
|
4,4'-DDD
|
<0.0086
|
<0.0086
|
ND
|
0.002
|
|
4,4'-DDE
|
<0.0086
|
0.0008
|
ND
|
0.0022
|
|
4,4'-DDT
|
<0.0086
|
<0.0086
|
ND
|
0.00158
|
|
|
|
|
|
|
a: Effects range-low (ERL) represents the 10th percentile for the dataset in which effects were observed or predicted in studies compiled by Long et al. (1998).
|
|
b: Screening guidelines represent concentrations for Cr.+6
|
|
c: Marine apparent effects threshold (AET) for bioassays. The AET represents the concentration above which adverse biological impacts would be expected.
|
|
NA: Screening guidelines not available.
|
|
ND: Not detected.
|
