HomeMy WebLinkAbout20080868 Ver 2_Appendix F Metals_20210701APPENDIX F
2020 Sediment and Water Column Metals
(CD/DVD only)
Table F-1. Minimum and maximum 2020 values for each detected metal and the creek sediment in which it was detected. Control creeks are
indicated with an asterisk (*). Neither silver (Ag), cadmium (Cd), nor molybdenum (Mo) was detected in any creek.
Metal
Al (%)
As (Nglg)
Cr (Nglg)
Cu (Nglg)
Fe (%)
Se (Nglg)
Zn (Nglg)
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Range
Creek
0.01
HC
►
2.57
PA
2.20
BR
r
7.40
PC
6.50
PA
41.8
PC
1.70
PA
27.00
MD*
0.01
HC
►
3.67
PC
1.60
PA
6.00
JK/PC
13.40
PA
94.60
JK
HC = Huddles Cut
MD* = Muddy PA* = PA2
BR = Broomfield JK = Jacks
PC=Porter
Table F-2. Values of sediment metals detected in 2020 in the PCS creeks study. Creeks are listed with
most upstream creek on South Creek first (Broomfield Swamp Creek) and proceed downstream by creek
to Hickory Point and Muddy Creek, then upriver along the Pamlico to the most western creeks. Control
creeks are indicated with an asterisk (*) and a less than symbol (<) indicates the reporting limit for
undetected metals in a creek sample.
AI (%)
Ag
(pgIg)
As
(pgIg)
Cd
(pgIg)
Cr
(pgIg)
Cu
(pgIg)
Fe (%)
Mo
(pgIg)
Se
(pgIg)
Zn
(pgIg)
Creek
Broomfield
0.663
<1.2
2.20
<1.2
8.7
4.10
0.779
<6.6
2.60
46.7
SCUT1*
1.67
<1.3
6.10
<1.3
23.2
11.50
1.78
<9.1
4.30
68.1
Jacks
1.99
<1.7
7.20
<1.7
34.90
14.60
2.78
<10
6.00
94.60
Little*
2.33
<1.5
5.90
<1.5
38.60
13.50
2.30
<8.8
5.00
88.10
Jacobs
1.75
<1.6
7.00
<1.6
34.00
12.70
2.67
<9.1
5.50
69.80
PA2*
2.57
<0.54
2.30
<0.54
6.50
1.70
0.45
<3.4
1.60
13.40
Drinkwater
1.74
<1.8
6.70
<1.8
35.30
11.90
2.65
<9.0
5.10
63.20
Long*
1.69
<1.4
6.10
<1.4
37.90
11.60
2.51
<7.6
4.90
61.00
Tooley
1.73
<1.2
6.50
<1.2
34.80
10.60
2.59
<7.1
4.90
74.40
Muddy*
2.11
<1.4
6.00
<1.4
40.10
27.00
2.44
<8.6
5.20
76.70
Huddles Cut
0.01
<0.43
<0.43
<0.43
<0.43
<0.43
0.01
<3.0
<0.43
<1.2
Porter
2.27
<1.2
7.40
<1.2
41.80
15.30
3.67
<9.4
6.00
67.30
DCUT11
1.28
<2.5
6.40
<2.5
21.10
11.10
2.27
<13
5.50
53.80
DCUT19*
1.01
<2.2
6.20
<2.2
18.50
11.30
2.11
<13
4.30
62.80
Duck*
0.86
<1.3
6.40
<1.3
26.70
22.50
3.31
<8.8
5.60
45.80
All mean
Control* mean
Other mean
1.58
1.75
1.43
NA
NA
NA
5.89
5.57
6.20
NA
NA
NA
28.72
27.36
30.09
12.81
14.16
11.47
2.16
2.13
2.18
NA
NA
NA
4.97
4.43
5.50
63.26
59.41
67.11
Table F-3. Values for physical parameters of 2020 sediment samples from PCS study creeks. Control creeks are indicated with
an asterisk (*).
Creek
Bulk density Water content Water content Dry sediment % Soil -solid Total organic
/cm3 (% by weight) (% b volume density(g/cm3) Porosity
(g ) 9 ) Y ) as dry weight carbon (g/kg)
Broomfield Creek 0.58 57.27 79.00 0.006 37.00 0.78 58.80
SCUT1* 0.26 77.35 91.00 0.003 25.40 0.90 74.80
Jacks Creek 0.25 78.54 91.00 0.002 22.90 0.91 75.70
Little Creek* 0.36 70.30 87.00 0.004 28.30 0.86 47.50
Jacobs Creek 0.30 74.28 88.00 0.003 23.80 0.89 70.10
PA2" 1.14 33.02 57.00 0.012 67.10 0.57 6.14
Drinkwater Creek 0.32 72.83 87.00 0.003 27.10 0.88 65.40
Long Creek* 0.34 71.72 88.00 0.003 29.90 0.87 45.40
Tooley Creek 0.38 69.37 86.00 0.004 33.60 0.86 43.60
Muddy Creek* 0.27 76.38 89.00 0.003 25.20 0.90 64.20
Huddles Cut 1.31 16.72 27.00 0.013 84.00 0.51 <1.2
Porter Creek 0.31 73.87 88.00 0.003 26.50 0.88 51.70
DCUT11 0.18 83.36 92.00 0.002 17.10 0.93 12.60
DCUT19* 0.19 82.78 92.00 0.002 19.10 0.93 14.40
Duck Creek* 0.29 75.19 88.00 0.003 24.10 0.89 75.20
Mean all (SD) 0.43 (0.34) 67.53 (18.63) 82.00 (17.48) 0.004 (0.003) 32.74 (18.36) 0.84 (0.13) 50.40 (24.00)
Mean control (SD) 0.41 (0.33) 69.53 (16.60) 84.57 (12.29) 0.004 (0.003) 30.70 (15.05) 0.85 (0.12) 46.81 (27.69)
Mean other (SD) 0.45 (0.37) 65.78 (21.22) 79.75 (21.67) 0.005 (0.004) 35.07 (22.59) 0.83 (0.14) 53.99 (21.25)
Table F-4. Values of total recoverable metals in the 2020 PCS creek study water samples. Nine detections were measured in 2020 (all for Fe). Values
with less than symbol (<) were not detected at the reporting limit shown.
Recoverable metals 2019 water column
Creek
Broomfield Creek
SCUT1*
Jacks Creek
Little Creek*
Jacobs Creek
PA2*
Drinkwater Creek
Long Creek*
Tooley Creek
Muddy Creek*
Huddles Cut
Porter Creek
DCUT11
DCUT19*
Duck Creek*
Ag (Ng/L) As (Ng/L) Cd (Ng/L) Cr (Ng/L) Cu (Ng/L) Fe (Ng/L) Mo (Ng/L)
<5.0 <5.0 <5.0 <5.0 <5.0 2460 <50
<5.0 <5.0 <5.0 <5.0 <5.0 1200 <50
<5.0 <5.0 <5.0 <5.0 <5.0 598 <50
<5.0 <5.0 <5.0 <5.0 <5.0 737 <50
<5.0 <5.0 <5.0 <5.0 <5.0 541 <50
<5.0 <5.0 <5.0 <5.0 <5.0 <500 <50
<5.0 <5.0 <5.0 <5.0 <5.0 548 <50
<5.0 <5.0 <5.0 <5.0 <5.0 <500 <50
<5.0 <5.0 <5.0 <5.0 <5.0 <500 <50
<5.0 <5.0 <5.0 <5.0 <5.0 <500 <50
<5.0 <5.0 <5.0 <5.0 <5.0 550 <50
<5.0 <5.0 <5.0 <5.0 <5.0 <500 <50
<5.0 <5.0 <5.0 <5.0 <5.0 1000 <50
<5.0 <5.0 <5.0 <5.0 <5.0 <500 <50
<5.0 <5.0 <5.0 <5.0 <5.0 1090 <50
Se (Ng/L)
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
Zn (Ng/L)
<20
<20
<20
<20
<20
<20
<20
<20
<20
<20
<20
<20
<20
<20
<20
F-4