| |
Groundwater (µg/L)
|
Surface Water (µg/L)
|
|
Western Vieques
|
Western Vieques
|
|
|
Contaminant
|
Main Operations Area
|
AOC J
|
SWMU 4
|
SWMU 6
|
SWMU 7
|
AOC J
|
SWMU 6
|
AWQCa
|
|
|
|
|
|
|
|
|
|
|
|
METALS/INORGANICS
|
|
|
|
|
|
|
|
|
|
Arsenic
|
6.3
|
6.4
|
ND
|
13.3
|
27
|
<2.9
|
5.3
|
36
|
|
Cadmium
|
0.46
|
3.9
|
4.6
|
3.3
|
0.8
|
<0.27
|
2
|
8.8
|
|
Chromiumb
|
140
|
43
|
3800
|
8.9
|
29
|
<0.87
|
1.1
|
50
|
|
Copper
|
250
|
130
|
120000
|
10
|
18
|
3.2
|
5
|
3.1
|
|
Lead
|
12
|
12
|
7600
|
25
|
9.5
|
<1.6
|
15
|
8.1
|
|
Mercury
|
ND
|
0.076
|
0.28
|
ND
|
ND
|
0.049
|
1.6
|
0.094c
|
|
Nickel
|
88
|
25
|
8100
|
4.4
|
19
|
4.1
|
1.1
|
8.2
|
|
Selenium
|
7.2
|
ND
|
2900
|
7.2
|
3.6
|
<4.6
|
6.4
|
71
|
|
Silver
|
ND
|
1.4
|
820
|
2.1
|
0.79
|
<0.57
|
7.1
|
1.9d
|
|
Thallium
|
10
|
ND
|
ND
|
ND
|
ND
|
17
|
4.9
|
2130e
|
|
Vanadium
|
490
|
330
|
25000
|
9.9
|
46
|
1.5
|
5.8
|
NA
|
|
Zinc
|
380
|
94
|
37000
|
180
|
3000
|
<5
|
ND
|
81
|
|
|
|
|
|
|
|
|
|
|
|
PESTICIDES/PCBs
|
|
|
|
|
|
|
|
|
|
4,4'-DDT
|
0.028
|
N/A
|
N/A
|
ND
|
N/A
|
N/A
|
N/A
|
0.001f
|
|
Dieldrin
|
0.11
|
N/A
|
N/A
|
ND
|
N/A
|
N/A
|
N/A
|
0.0019
|
|
Aroclor 1221
|
ND
|
N/A
|
N/A
|
0.7
|
N/A
|
N/A
|
N/A
|
0.03
|
|
Aroclor 1232
|
ND
|
N/A
|
N/A
|
0.09
|
N/A
|
N/A
|
N/A
|
0.03
|
| |
|
|
|
|
|
|
|
|
| a: Ambient water quality criteria for the protection of aquatic organisms (USEPA 2002). Marine chronic criteria presented. |
| b: Screening guidelines represent concentrations for Cr.+6 |
| c: Derived from inorganic, but applied to total mercury. |
| d: Chronic criterion not available; acute criterion presented. |
| e: Lowest Observable Effect Level (LOEL) (USEPA 1986). |
| f: Expressed as Total DDT. |
| NA: Screening guidelines not available. |
| ND: Not detected. |
| N/A: Not analyzed for. |
