HomeMy WebLinkAbout20080868 Ver 2_Appendix F Metals_20220605APPENDIX F
2021 Sediment and Water Column Metals
(Data only on Flash Drive)
Table F-1. Minimum and maximum 2021 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 (Ng/g)
Cr (Ng/g)
Cu (Ng/g)
Fe (%)
Se (Ng/g)
Zn (Ng/g)
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Range
Creek
0.05
HC
9.46
DC19*
<0.58
HC
7.90
PC
0.65
HC
41
MD
<0.58
HC
30.30
MD*
0.03
HC I
4.39
PA
<0.58
HC
5.60
DK`/PC
<1.2
HC
91.90
JK
HC = Huddles Cut MD` = Muddy
PA* = PA2 DK* = Duck
JK = Jacks
PC = Porter DC19 = DCUT19
F-1
Table F-2. Values of sediment metals detected in 2021 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(pg/g)
Ag
As
(pg/g)
Cd
(pg/g)
Cr
(pg/g)
Cu
(pg/g)
Fe (%)
Mo
(pg/g)
Se
(pg/g)
Zn
(pg/g)
Creek
Broomfield
2.08
<1.2
6.10
<1.2
26.7
16.30
2.08
<6.4
4.40
75.1
SCUT1*
1.57
<1.2
4.60
<1.2
18.3
10.10
1.47
<5.8
3.20
54.4
Jacks
2.30
<1.9
6.80
<1.9
24.90
13.20
2.33
<10
4.60
91.90
Little*
2.94
<1.6
6.20
<1.6
33.40
13.80
2.18
<8.3
4.60
86.90
Jacobs
2.64
<1.5
6.60
<1.5
30.00
13.70
2.47
<9.1
4.70
84.60
PA2*
3.32
<0.67
2.10
<0.67
6.00
1.80
4.39
<10
1.30
88.80
Drinkwater
3.01
<1.6
7.40
<1.6
36.40
13.90
2.86
<10
4.80
88.80
Long*
2.72
<1.4
5.80
<1.4
34.00
11.90
2.38
<8.3
4.30
75.50
Tooley
2.50
<1.3
6.50
<1.3
30.90
11.10
2.54
<8.2
4.10
77.20
Muddy*
2.85
<1.6
7.10
<1.6
41.00
30.30
2.78
<8.8
5.10
89.90
Huddles Cut
0.05
<0.58
<0.58
<0.58
0.65
<0.58
0.03
<2.9
<0.58
<1.2
Porter
2.64
<1.7
7.90
<1.7
40.20
16.70
3.87
<7.4
5.60
62.00
DCUT11
1.55
<3.1
5.00
<3.1
16.50
9.60
2.07
<15
4.20
53.10
DCUT19*
9.46
<1.8
6.70
<1.8
<1.9
17.60
29.50
12.90
23.70
1.78
3.55
<9.5
<11
3.30
5.60
38.50
84.30
Duck*
2.26
<1.9
7.80
All mean
Control* mean
Other mean
2.79
3.59
2.10
NA
NA
NA
6.19
5.76
6.61
NA
NA
NA
25.74
25.69
25.78
14.21
14.93
13.50
2.45
2.65
2.28
NA
NA
NA
4.35
4.03
4.67
75.07
74.04
76.10
F-2
Table F-3. Values for physical parameters of 2021 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 s Porosity
(g ) 9 ) Y ) ty (g/cm) as dry weight carbon (g/kg)
Broomfield Creek 0.49 62.11 80.00 0.005 34.10 0.82 41.50
SCUT1* 0.36 70.49 87.00 0.004 30.60 0.86 56.00
Jacks Creek 0.22 80.33 91.00 0.002 22.20 0.92 73.00
Little Creek* 0.38 69.08 85.00 0.004 26.40 0.86 49.40
Jacobs Creek 0.28 75.79 88.00 0.003 23.40 0.89 66.30
PA2" 1.20 30.44 53.00 0.012 63.70 0.55 65.70
Drinkwater Creek 0.32 72.90 86.00 0.003 22.90 0.88 62.40
Long Creek* 0.35 70.64 85.00 0.004 27.80 0.86 46.20
Tooley Creek 0.38 69.37 86.00 0.004 29.90 0.87 43.10
Muddy Creek* 0.30 74.10 87.00 0.003 24.80 0.89 53.10
Huddles Cut 1.33 15.59 25.00 0.013 80.30 0.50 1.21
Porter Creek 0.33 72.12 87.00 0.003 25.00 0.87 47.50
DCUT11 0.16 85.24 93.00 0.002 15.40 0.94 111.00
DCUT19* 0.28 76.20 90.00 0.003 23.40 0.89 91.60
Duck Creek* 0.24 78.64 90.00 0.002 19.70 0.91 72.60
Mean all (SD) 0.44 (0.34) 66.87 (18.82) 80.87 (18.06) 0.004 (0.003) 31.31 (17.41) 0.83 (0.13) 58.71 (24.77)
Mean control (SD) 0.44 (0.34) 67.08 (16.52) 82.73 (13.14) 0.004 (0.003) 30.18 (13.91) 0.83 (0.13) 62.09 (15.95)
Mean other (SD) 0.44 (0.37) 66.68 (21.78) 79.50 (22.35) 0.004 (0.004) 32.60 (21.86) 0.84 (0.14) 55.75 (31.42)
F-3
Table F-4. Values of total recoverable metals in the 2021 PCS creek study water samples. Four detections were measured in 2021 (all for Fe). Values
with less than symbol (<) were not detected at the reporting limit shown.
Recoverable metals 2019 water column
Creek Ag (pg/L) As (pg/L) Cd (pg/L) Cr (pg/L) Cu (pg/L) Fe (pg/L) Mo (pg/L) Se (pg/L) Zn (pg/L)
Broomfield Creek <5.0 <5.0 <5.0 <5.0 <5.0 2650 <250 <5.0 <100
SCUT1* <5.0 <5.0 <5.0 <5.0 <5.0 1940 <250 <5.0 <100
Jacks Creek <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
Little Creek* <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
Jacobs Creek <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
PA2* <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
Drinkwater Creek <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
Long Creek* <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
Tooley Creek <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
Muddy Creek* <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
Huddles Cut <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
Porter Creek <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
DCUT11 <5.0 <5.0 <5.0 <5.0 <5.0 1100 <250 <5.0 <100
DCUT19* <5.0 <5.0 <5.0 <5.0 <5.0 569 <250 <5.0 <100
Duck Creek* <5.0 <5.0 <5.0 <5.0 <5.0 <500 <250 <5.0 <100
F-4