NC0004961_Water Quality Study-Follow up_19890717

Duke Power Company [phone]
Fossil Production Department
P 0 Box 33189
422 South Church Street
Chmlove, N C 28242
DUKE POKIER
July 17, 1989
Mr. Steve W. Tedder
North Carolina Department of Natural
Resources and Community Development
512 North Salisbury Street
P. 0. Box 27687
Raleigh, North Carolina 27611-7687
Subject: Riverbend Steam Station
NPDES Permit
Mt. Island Lake Water Quality Study
File: RB -704.10
Dear Mr. Tedder:
Thank you for your comments concerning the report, "Mountain Island Lake,
North Carolina: Water Quality Monitoring 1988". We agree to continue monitor-
ing fish and sediment trace elements once per year at the same stations as
sampled in 1988. The next sampling is scheduled for late summer 1989.
Enclosed is the ANOVA summary for sediment trace elements requested by the
Water Quality Section. Also enclosed is the vertical transect field data for
DO, temperature, pH and specific conductance.
The specific conductance data along horizontal transects at each station
showed little variability. Unfortunately this data was not recorded and
therefore cannot be submitted.
If you have any questions or comments, please call me at [phone].
Sincerely,
Ralph C. Roberts
Fossil Environmental Compliance JUL 20 is i
RCR:mp .: R Y.
I 1
Enclosures
cc: w/o enclosures
B. K. Sipe

Arsenic, cadmium, copper, mercury, nickel, and selenium mean
concentrations and standard deviation (pg•g-1 dry weight) of
ten replicate fine-suspendable sediment samples collected
August 1, 1988 at Locations 16.0, 277.6, 277.5, and 275.0 on
Mountain Island Lake. Numbers not joined by an underscore indicate
significance at p = 0.05.
Element
16.0
277.6
277.5
275.0
Arsenic
8.1 ± 2.4
13 ± 10
18 ± 23
14 ± 5.6
Cadmium
75 ± 34
162 ± 198
70 ± 101
5.6 ± 5.1
Copper
654 ± 375
1550 ± 2030
703 ± 1010
198 ± 255
Mercury
4.0 ± 1.8
8.9 ± 11
4.1 ± 5.4
0.23 ± 0.14
Nickel
87 ± 131
289 ± 358
143 ± 255
41 ± 44
Selenium
1.0 ± 0.45
4.7 ± 6.2
2.1 ± 1.9
3.0 ± 2.1

Arsenic (As), cadmium (Cd), copper (Cu), mercVry (Hg), nickel
(NO, and selenium (Se) concentrations ()Ig•g dry weight) In
fine-suspendable sediment samples collected 1 August 1988 at
four locations on Mountain Island Lake (< indicates less than
given value).
Loc
Date
As
Cd
Cu
Hg
Ni
Se
275.0
08/01/1988
5.67
18.0
<
50.5
<
0.27
<
1.35
<
0.07
275.0
08/01/1988
11.1
<
3.45
534.
<
0.18
<
0.92
2.67
275.0
08/01/1988
20.6
<
11.1
111.
<
0.59
49.9
2.99
275.0
08/01/1988
17.1
<
3.48
383.
<
0.19
88.2
5.69
275.0
08/01/1988
17.1
<
2.62
724.
<
0.14
73.8
<
0.03
275.0
08/01/1988
17.2
<
3.18
<
31.8
<
0.17
<
0.85
2.47
275.0
08/01/1988
5.15
<
5.54
<
55.4
<
0.30
112.
3.23
275.0
08/01/1988
9.46
<
1.07
<
10.7
<
0.06
76.6
2.03
275.0
08/01/1988
17.3
<
3.33
<
33.3
<
0.18
<
0.89
6.15
275.0
08/01/1988
18.7
<
4.54
<
45.4
<
0.24
<
1.21
4.90
277.5
08/01/1988
8.51
<
3.68
<
36.8
<
0.20
89.4
4.73
277.5
08/01/1988
9.04
<
55.6
<
556.
<
2.96
<
14.8
<
0.74
277.5
08/01/1988
17.9
<
10.8
<
108.
<
0.57
<
2.87
1.72
277,5
08/01/1988
6.61
<
67.0
<
670.
<
3.57
336.
<
0.89
277.5
08/01/1988
13.8
<
38.9
<
389.
5.85
136.
<
0.52
277.5
08/01/1988
19.4
<
103.
c
1027.
<
5.48
<
27.4
<
1.37
277.5
08/01/1988
80.9
<
341.
<
3409.
<
18.2
806.
<
4.55
277.5
08/01/1988
8.36
<
4.14
<
41.4
<
0.22
<
1.10
4,96
277.5
08/01/1968
2.17
<
6.23
<
62.3
<
0.33
<
1.66
0.08
277.5
08/01/1988
11.6
<
73.5
<
735.
<
3.92
<
19.6
0.98
277.6
08/01/1988
20.3
<
125.
<
1250.
<
6.67
667.
x.17
277.6
08/01/1988
34.6
<
682.
<
6818.
<
36.4
362.
9.09
277.6
08/01/1988
7.27
<
34.7
<
347.
<
1.85
<
9.26
G.46
277.6
08/01/1988
8.57
<
134.
<
1339.
10.2
7()8.
<
1.79
277.6
08/01/1988
< 9.26
<
139.
<
1389.
<
7.41
<
37.0
277.6
08/01/1988
< 5.62
<
84.3
127.
<
4.49
<
22.5
1.;2
277.6
08/01/1988
16.5
<
288.
<
2885.
<
15.4
947.
277.6
08/01/1988
20.8
<
68.2
<
682.
<
3.64
125.
277.6
08/01/1988
0.91
<
19.0
<
190.
1.02
<
5.08
0.25
277.6
08/01/1988
2.94
<
46.0
,
460.
2.45
<
12.3
t'.
16.0
08/01/1988
< 10.2
<
153.
<
1531.
<
8.16
<
40.8
2.-4
16.0
08/01/1988
10.9
<
78.1
<
781.
<
4.17
<
20.8
1 04
16.0
08/01/1988
< 5.43
<
61.5
<
815.
<
4.35
424.
1.109
16.0
08/01/1986
11.4
<
84.3
<
843.
<
4.49
143.
<
1.12
16.0
08/01/1988
< 6.41
<
96.2
263.
<
5.13
<
25.6
1.29
16,0
08/01/1988
8.74
<
52.4
298.
<
2.80
<
14.0
D.7C)
16,0
oe/O1/1988
5.03
<
52.4
<
524.
<
2.80
159.
0.70
16.0
08/01/1988
9.76
c
60.5
<
605.
<
3.23
<
16.1
:•.31
16.0
08/01/1988
6.13
<
54.7
<:
547,
<
2.92
<
14.6
16.0
08/01/1988
6.94
<
32.9
<
328.
<
1.75
<
8.73
�.�4

Mountain Island
Lake Temperature,
Dissolved
Oxygen,
Specific
Conductance,
and pH Data
Location
Date
Depth Temperature
DO
Sp Cond
pH
(m)
(° C)
(mg/1)
OIS/Cm)
16.00
08/01/88
0.3
29.2
7.0
61
6.5
16.00
08/01/88
1.0
28.6
7.1
61
6.5
16.00
08/01/88
2.0
28.5
6.9
60
6.4
16.00
08/01/88
3.0
28.0
6.1
60
6.3
16.00
08/01/88
4.0
27.9
6.0
61
6.3
16.00
09/29/88
0.3
25.0
7.6
69
6.9
16.00
09/29/88
1.0
25.1
7.5
68
7.0
16.00
09/29/88
2.0
24.9
7.5
68
7.0
16.00
09/29/88
3.0
25.0
7.5
68
6.9
16.00
09/29/88
4.0
24.7
7.4
68
6.9
272.00
08/01/88
0.3
27.2
3.9
66
6.9
272.00
09/29/88
0.3
23.8
6.3
61
6.0
275.00
08/01/88
0.3
29.5
8.6
60
7.7
275.00
08/01/88
1.0
29.5
8.6
60
7.7
275.00
08/01/88
2.0
29.5
8.6
60
7.8
275.00
08/01/88
3.0
28.8
7.7
60
7.2
275.00
08/01/88
4.0
28.6
6.7
60
6.9
275.00
08/01/88
5.0
28.3
5.6
61
6.5
275.00
08/01/88
6.0
28.1
4.8
61
6.4
275.00
08/01/88
7.0
27.9
4.1
62
6.3
275.00
08/01/88
8.0
27.6
3.2
62
6.2
275.00
08/01/88
9.0
27.3
2.4
63
6.1
275.00
08/01/88
10.0
26.7
1.4
63
6.0
275.00
08/01/88
11.0
26.2
0.9
63
6.0
275.00
08/01/88
12.0
25.7
0.4
63
6.0
275.00
08/01/88
13.0
25.3
0.0
65
6.0
275.00
08/01/88
14.0
25.0
0.0
68
6.1
275.00
08/01/88
15.0
23.8
0.0
76
6.2
275.00
08/01/88
16.0
21.0
0.0
104
6.6
275.00
08/01/88
17.0
19.1
0.0
121
6.8
275.00
09/29/88
0.3
24.1
7.6
67
6.9
275.00
09/29/88
1.0
24.1
7.5
68
6.8
275.00
09/29/88
2.0
24.1
7.6
68
6.8
275.00
09/29/88
3.0
24.1
7.1
68
6.8
275.00
09/29/88
4.0
24.1
6.8
67
6.7
275.00
09/29/88
5.0
24.0
6.9
67
6.7
275.00
09/29/88
6.0
24.0
6.9
67
6.7
275.00
09/29/88
7.0
24.0
6.6
67
6.7
275.00
09/29/88
8.0
23.9
6.3
67
6.6
275.00
09/29/88
9.0
23.9
5.8
68
6.6
275.00
09/29/88
10.0
23.9
5.4
68
6.5

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Location
Date
Depth
Temperature
DO
Sp Cond
pH
(m)
(° C)
(mg/1)
(us/cm)
277.50
09/29/88
0.3
23.9
7.8
69
6.9
277.50
09/29/88
1.0
23.9
7.8
69
6.9
277.50
09/29/88
2.0
23.7
7.5
69
6.8
277.50
09/29/88
3.0
23.7
7.5
70
6.9
277.50
09/29/88
4.0
23.6
7.4
69
6.8
277.60
08/01/88
0.3
29.7
7.4
61
6.7
277.60
08/01/88
1.0
29.4
7.5
61
6.7
277.60
08/01/88
2.0
28.9
7.2
61
6.7
277.60
09/29/88
0.3
24.4
7.7
69
6.9
277.60
09/29/88
1.0
24.4
7.7
69
6.9
277.60
09/29/88
2.0
24.3
7.7
69
6.9
277.60
09/29/88
3.0
24.3
7.6
69
6.9
279.00
08/01/88
0.3
29.0
6.6
61
6.5
279.00
09/29/88
0.3
24.9
7.2
69
6.8