NC0004979_Permit App Update_20160329

DUKEDUKE ;,1,-m Steam Station
Duke Energy
ENERGY 253 Plant Allen Rd
Belmont.NC 28012
March 29, 2016
Mr. Jeffrey Poupart ,'OR 0 s
North Carolina Division of Water Resources
1617 Mail Service Center Water Qua;ity
Raleigh, NC 27699-1617 Permitting Se=ctk c
Subject: NPDES Wastewater Permit Application Update
Allen Steam Station
Dear Mr. Poupart,
Duke Energy is submitting herewith supplemental information in support of a NPDES application
package previously provided October 15, 2014. Please include this supplemental information
with the previous package for your review.
The areas of wetness in the table below were discovered since the last permit application
update and were sampled, where determined necessary and possible, in accordance with the
Riverbend Plan for Identification of New Discharges (May 8, 2015 version).
AOW ID Location Coordinates Description
Latitude Longitude
Located approximately 100'south of S-08. Standing water is
present for the majority of the year. It is similar to S-8 in that
S-08B 35.17816 -81.006517
the rip rap blanket drains into the perimeter ditch and then into
a culvert that empties into the Catawba River.
Located in the vicinity of existing French drain installed in late
5-10 2011 at the toe of Cell 1. The area is about 10 feet by 10 feet and
(French 35.18055 -81.01354 contains standing water. No active flow was observed except
Drain) for that flowing from the French drain.The French drain
empties into the drainage system of stormwater outfall SW015.
Attached are the analytical data for these areas of wetness as well as a map that indicates the
locations of these areas of wetness. Should you have any questions regarding this letter or
require additional information, please contact Mr. Ross Hartfield at 980-373-6583 or at
[e-mail].
I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the

Poupart
March 29, 2016
Page 2 of 2
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.
Siincerrel ,
Brent Dueitt
General Manager II, Allen Steam Station
NCDEQ cc: Sergei Chernikov
Duke cc: Ross Hartfield, Jeremy Pruett, Richard Baker, Jim Wells, Randy Gantt, Scott Harris

Table A-1.Allen Steam Station Seep/AOW Monitoring Analytical Results-May 4, 2015
Parameters Units S-1 S-2 S-3 S-4 S-8
Oil & Grease mg/L <5 <5 <5 <5 <5
Nitrite+Nitrate mg-N/L 0.023 0.012 0.02 0.023 0.071
(NO2NO3)
COD mg/L <20 <20 <20 <20 <20
Bromide mg/L <0.1 2.76 1.362 1.599 0.1339
CI -Chloride mg/L 4.387 53.4 31.83 41.27 7.034
Fl -Fluoride mg/L <0.1 <0.1 0.1108 <0.1 0.1123
SO4-Sulfate mg/L 2.595 14.38 23.77 27.06 86.05
Al -Aluminum mg/L 0.819 0.075 0.056 0.082 0.042
Ba -Barium mg/L 0.045 0.128 0.052 0.051 0.064
B-Boron mg/L <0.05 0.788 0.586 0.696 0.346
Ca-Calcium mg/L 5.81 7.25 59.6 70.8 94.8
Hardness (CaCO3) 26.6 78 198 245 278
Fe-Iron mg/L 1.27 0.963 0.377 0.34 0.08
Mg -Magnesium mg/L 2.95 14.6 12 16.6 10.1
Mn -Manganese mg/L 0.355 0.39 0.372 0.202 0.027
P-Phosphorus mg/L <0.02 <0.02 0.046 0.059 0.059
Zn -Zinc mg/L <0.005 0.008 <.005 <0.005 0.021
Sb -Antimony pg/L <1 <1 <1 <1 <1
As -Arsenic pg/L <1 <1 <1 <1 <1
Cd -Cadmium pg/L <1 <1 <1 <1 <1
Cr-Chromium pg/L <1 <1 <1 <1 <1
Cu -Copper pg/L <1 <1 <1 <1 1.22
Pb-Lead pg/L <1 <1 <1 <1 <1
Molybdenum(Mo) pg/L <1 <1 <1 <1 2.8
Ni -Nickel pg/L <1 2.76 <1 <1 2.55
Se-Selenium pg/L <1 <1 <1 <1 <1
Total Kjeldahl
Nitrogen mg-N/L <0.15 <0.15 <0.15 <0.15 0.2
(Colorimetric)
TI -Thallium pg/L <0.2 <0.2 <0.2 <0.2 <0.2
TDS -Total Diss. mg/L 70 140 270 310 340
Solids
TSS -Total mg/L 7 6 <5 <5 <5
Suspended Solids
V-Vanadium ug/L 2.68 <1 <1 <1 <1
Hg -Mercury ng/L 1.98 1.56 <0.5 <0.5 0.769
pH SI Units 6.77 6.57 7.15 7.27 7.66
Specific pS/cm 84 248 459 545 559
Conductance
Temperature °C 14.5 15.5 18.9 18.1 20.4
A-1

Table A-2. Allen Steam Station Seep/AOW Monitoring Analytical Results-June 26,
2015/July 1, 2015
Parameters' Units S-3 S-4
Alkalinity mg/L 149 177
Bicarbonate Alkalinity mg/L 149 177
Nitrite+Nitrate(NO2NO3) mg/L 0.055 0.028
CI- Chloride mg/L 38.4 44.2
SO4- Sulfate mg/L 25.2 18.8
Al - Aluminum mg/L 0.2 0.2 RECEIVED/NCDEQiDWF
Al -Aluminum,dissolved mg/L - -
Ba- Barium mg/L 0.065 0.062 APR 0 4 Z`,.!
Ba-Barium, dissolved mg/L 0.051 0.041
B- Boron mg/L 0.61 0.8 Water Quality
B -Boron, dissolved mg/L 0.63 0.8 Permitting Section
Ca -Calcium ug/L 58300 68200
Fe- Iron mg/L 2.2 1.90
Fe -Iron, dissolved mg/L - -
Mg -Magnesium ug/L 12600 16900
Mn -Manganese mg/L 0.8 0.89
Mn -Manganese, dissolved mg/L 0.46 0.081
K-Potassium pg/L 2650 2870
Na-Sodium pg/L 12100 12000
Strontium mg/L 0.26 0.2
Strontium, dissolved mg/L 0.27 0.18
Zn - Zinc mg/L 0.0066 0.011
Zn -Zinc,dissolved mg/L - 0.0027
Antimony pg/L - -
Antimony,dissolved pg/L - -
As - Arsenic pg/L 0.86 0.46
As-Arsenic,dissolved pg/L 0.34 0.24
Beryllium pg/L - -
Beryllium, dissolved pg/L - -
Cadmium pg/L - -
Cadmium, dissolved pg/L - -
Cr- Chromium pg/L 0.23 0.29
Cr-Chromium,dissolved pg/L 0.19 -
Cobalt pg/L 1.20 1.10
Cobalt, dissolved pg/L 0.36 -
Cu- Copper pg/L 1.10 _ 0.86
Cu -Copper, dissolved pg/L 0.48 0.44
Pb- Lead pg/L 0.2 0.11
Pb-Lead,dissolved pg/L - -
Molybdenum (Mo) pg/L 0.21 0.18
Mo -Molybdenum pg/L 0.26 0.31
Ni- Nickel pg/L 0.61 0.71
Ni -Nickel, dissolved pg/L 0.91 0.45
Selenium pg/L - -
Selenium, dissolved pg/L - -
Thrllium pg/L - -
Thallium, dissolved pg/L - -
Vanadium pg/L 1.30 0.94
Vanadium,dissolved pg/L 0.45 -
Methane pg/L 5.20 0.84
A-2

Parameters' Units S-3 S-4
Sulfide mg/L - -
TOD Total Organic Carbon mg/L 1.10 2.20
TDS- Total Diss. Solids mg/L 275 317
TSS -Total Suspended Solids mg/L 14.7 -
Hg - Mercury pg/L 0.08 -
Hg- Mercury, dissolved pg/L - -
Hg- Mercury2 ng/L 0.711 0829
Notes:
' Samples were analyzed by Pace
2 Mercury samples collected on July 1, 2015.
A-3

Table A-3.Allen Steam Station Seep/AOW Monitoring Analytical Results—July 22, 2015
Parameters Units S-8B
CI- Chloride mg/L 9.3
FI-Fluoride mg/L 0.12
SO4- Sulfate mg/L 77
Al - Aluminum mg/L 0.219
Ba- Barium mg/L 0.064
B- Boron mg/L 0.768
Fe- Iron mg/L 0.9
Mn -Manganese mg/L 0.31
Zn- Zinc mg/L 0.007
Sb-Antimony pg/L <1
As- Arsenic pg/L <1
Cd-Cadmium pg/L <1
Cr-Chromium pg/L <1
Cu- Copper pg/L 1.38
Pb- Lead pg/L <1
Molybdenum (Mo) pg/L <1
Ni- Nickel pg/L 6.72
Se-Selenium pg/L <1
TI- Thallium pg/L <0.2
TDS-Total Diss.Solids mg/L 240
TSS-Total Suspended Solids mg/L 10
Nitrite+Nitrate(NO2NO3) mg/L 0.394
Hg- Mercury ng/L 0.685
pH SI Units 7.29
Specific Conductance pS/cm 411
Temperature °C 24.9
A-4

Table A-4.Allen Steam Station Seep/AOW Monitoring Analytical Results-October/November 2015
Parameters Units S-1' S-2 S-3' S-44 S-64 S-8B4 S-94
Alkalinity mg/L 43 10 140 160 <10 18 190
Bicarbonate Alkalinity mg/L 43 10 140 160 <10 18 190
Carbonate Alkalinity mg/L <10 <10 <10 <10 <10 <10 <10
NO2NO3-Nitrite Nitrate mg-NIL 0.067 <0.01 0.044 0.037 0.144 0.179 0.132
CI-Chloride mg/L 5 66 38 51 65 9.5 9.4
FI-Fluoride mg/L 0.13 0.12 0.17 <0.1 <0.1 0.14 0.25
504-Sulfate mg/L 0.99 14 28 25 48 98 220
Al-Aluminum mg/L 0.157 3.26 0.636 0.018 2.21 2.12 <0.005
Ba-Barium mg/L 0.024 0.127 0.058 0.054 0.322 0.051 0.022
B-Boron mg/L <0.05 1.2 0.686 0.833 1.06 0.772 1.57
Ca-Calcium mg/L 9.56 8.76 62.3 70.5 18 36.1 129
Fe-Iron mg/L 0.23 3.91 0.995 0.106 2.74 2.94 <0.01
Mg-Magnesium mg/L 3.18 16.9 13.5 17.7 16.2 5.79 22.1
Mn-Manganese mg/L 0.05 0.308 0.22 0.289 2.05 0.063 0.042
K-Potassium mg/L 1.67 3.71 2.7 3.51 4.5 7.59 12.7
Na-Sodium mg/L 7.45 10.7 12.1 11.2 9.71 7.73 12.6
Zn-Zinc mg/L <0.005 <0.005 <0.005 <0.005 0.014 0.009 0.016
Sb-Antimony pg/L <1 <1 <1 <1 <1 <1 <1
As-Arsenic pg/L <1 <1 <1 <1 <1 <1 <1
Cd-Cadmium Ng/L <1 <1 <1 <1 <1 <1 <1
Cr-Chromium pg/L 2.35 1.95 <1 <1 1.1 <1 <1
Cu-Copper pg/L <1 1.38 <1 <1 2.05 4.74 <1
Pb-Lead pg/L <1 1.85 <1 <1 1.14 <1 <1
Molybdenum(Mo) pg/L <1 <1 <1 <1 <1 <1 11.7
Ni-Nickel ug/L <1 1.59 <1 <1 2.86 4.61 _ <1
Se-Selenium pg/L <1 <1 <1 <1 <1 <1 <1
TI-Thallium pg/L <0.2 <0.2 0.694 <0.2 0.615 <0.2 <0.2
TDS-Total Diss.Solids mg/L 110 120 300 310 220 210 560
TSS-Total Suspended Solids mg/L 900 76 42 <5 120 6 <5
3
Hg-Mercury ng/L 3.64 1.86 <0.5 <0.5 - 0.659 0.86
pH SI Units 7.1 _ 6.87 7.55 7.68 7.34 8.58 7.25
Specific Conductance pS/cm 329 0.3 433 542 121 0.4 758
Temperature °C 14.5 27.4 20.9 21.5 24.2 29.1 24.2
A-5

Parameters Units S-1' S-2' S-3' 5-4'
-4 _ S-6' S-813'
-SB S-S.,
a
Turbidity NTU 16.0 5.5 2.6 1.8 - 8.6 21.3
Flow cfs 0.001 0.001 0.003 0.001 0.001 0.0001 0.003
Notes:
'S-1 was sampled on October 26,2015.
2S-2,S-3,S-4,S-6,S-8B,and S-9 were sampled on October 23,2015.
3Mercury and turbidity were sampled on November 25,2015,S-6 did not exhibit flow and no samples were collected.
A-6

Table A-5. Allen Steam Station Seep/AOW Monitoring Analytical Results —March 8, 2016
Parameters Units S-10(French
Drain)
Oil &Grease mg/L <5
Alkalinity mg/L 11
Bicarbonate Alkalinity mg/L 11
Carbonate Alkalinity _ mg/L <10
Nitrite+Nitrate mg-N/L 0.25
CI-Chloride mg/L 9.2
Fl -Fluoride mg/L 0.24
SO4-Sulfate mg/L 100
Al -Aluminum mg/L 0.23
Ba- Barium mg/L 0.049
B- Boron mg/L 0.866
Ca -Calcium mg/L 18.5
Total Hardness mg/L (CaCO3) 110
Fe-Iron mg/L <0.01
Mg-Magnesium mg/L 15.9
Mn-Manganese mg/L 3.25
K-Potassium mg/L 3.56
Na-Sodium mg/L 4.19
Zn-Zinc mg/L 0.029
Sb-Antimony pg/L <1
As -Arsenic pg/L <1
Cd-Cadmium pg/L <1
Cr-Chromium pg/L <1
Cu-Copper pg/L 1.41
Pb- Lead pg/L <1
Molybdenum (Mo) pg/L <1
Ni-Nickel pg/L 6.88
Se-Selenium pg/L <1
TI-Thallium pg/L 0.241
TDS-Total Diss. Solids mg/L 180
TSS -Total Suspended Solids mg/L <5
Hg- Mercury pg/L 33.8
pH SI Units 6.25
Specific Conductance pS/cm 288
Temperature °C 18.7
Turbidity NTU 0
Flow cfs 0.0036
A-7

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