NC0038377_Wasteload Allocation_19970114

PERMIT NO.: NCO038377
NPDES WASTE LOAD ALLOCATION
Modeler Date Rec. #
PERMITTEE NAME: Carolina Power & Light Company
FACILITY NAME: Mayo Steam Electric Plant
Facility Status: Existing
Permit Status: Renewal
Major
Pipe No.: 002
Minor
Design Capacity: No Flow Limit
Domestic (% of Flow)
Industrial (% of Flow)
0.2%
Comments:
Refer to application for flow data Flow not limited See description of
outfall 002.
RECEIVING STREAM: the Mayo Reservoir
Class: C
Sub -Basin: 03-02-05
Reference USGS Quad: A 23 SW (please attach)
County: Person
Regional Office: Raleigh Regional Office
Previous Exp. Date: 6/30/97 Treatment Plant Class: Class 2
Classification changes within three miles:
none
'tO F
SII
i
I
Requested by: Jeff; Myhra Date: 1/14/97
Prepared _- --=��� Date: s Arpu i tj
Reviewed by: Dom;
Drainage Area (mi); n/a s7Q10 (cfs): Lake
Instream Monitoring: not required
Acute (Fathead Minnow 24 hr) Toxicity Test - No Significant Mortality at 90%
February, May, August, and November
Monthly Daily
Average Maximum
Wasteflow (mgd):
Oil & Grease (mg/1):
15 20
Total Suspended Solids (mg/1):
30 100
Total Selenium (lbs/d):
3.8
pH (Si):
6 - 9
Arsenic (µg/1):
monitor
Copper (µg/1):
monitor
Iron (mg/1):
monitor
Effluent sample location prior to mixing with other waste streams.
No chemical metal cleaning waste may be discharged to the ash pond.
There shall be no discharge of polychlorinated biphenyl compounds such as
those commonly used for transformer fluid.
There shall be no discharge of floating solids or visible foam in other than trace
amounts outside an area of 5 meters from the discharge.

FOR APPROPRIATE DISCHARGES, LIST COMPLETE GUIDELINE LIMITATIONS BELOW
1
2
to
3U.0 in
15.0 in
nee 0.20 m
ts2 No Detectablf
0.20 in
1.0 mi
The ash pond receives ash transport water, coal pile runoff, stormwater runoff, cooling tower blowdown, and various low-
volume wastes such as boiler blowdown, oily waste treatment, wastes/backwash from the water treatment processes, plant area
wash down water, and equipment heat exchanger water. The sewage treatment plant effluent is also routed to the ash pond.
These parameters are monitored at outfall 001. Outfall 001 discharges into the ash pond. The ash pond discharges into the Mayo
Reservoir through outfall 002. See attached flow diagram for clarification.
tlectncity (tne taculty is an electric 143 411 UrK ran 41-3 - ,)team hiectnC rower
generating plant using coal-fired boilers to Generating Point Source Category
produce steam for turbine generators with a
combined net cavacity of 745 MWe.

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DISCHARGE LOCATION tk;
CAROLINA POWER & LIGHT COMPANY
MAYO STEAM ELECTRIC PLANT
OUTFALL 002
NCO038377
MAYO RESERVOIR
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GKEX88/MP
10/30/96
COMPLIANCE EVALUATION ANALYSIS REPORT
PAGE 1
PERMIT--NC0038377
PIPE --002
REPORT
PERIOD:
9509-9608
LOC ---E
FACILITY--CP&L MAYO
S.E. (PWR
PLT)
DESIGN FLOW-- 21.0000
CLASS --2
LOCATION --RALEIGH
REGION/COUNTY--05
PERSON
50050
00530
00400
00556
01002
01042
01045
01147
MONTH
Q/MGD RES/TSS
PH
OIL-GRSE
ARSENIC
COPPER
IRON
SELENIUM
LIMIT
NOL F
30.0
9.0 6.0
F 15.000
NOL
F 1.0000
F 1.0000
F 3.8000
95/09
3.7475
.0
8.1-7.8
.000
4.0000
.0000
.0000
95/10
5.5400
.0
7.2-7.2
.000
5.7500
115.0000
.0925
95/11
5.4500
3.5
7.4-7.1
.000
7.2000
124.0000
.1168
95/12
5.2625
15.0
7.5-7.3
.000
.0170
9.5000
142.5000
.1667
96/01
6.3180
16.0
7.6-7.5
3.000
.0242
10.0000
206.0000
.2198
96/02
5.2000
22.0
7.7-7.7
.000
.2266
96/03
3.8425
11.5
7.8-7.7
.000
.1745
96/04
.8650
4.0
7.9-7.9
.000
.0400
96/05
.9240
.0
7.8-7.6
.000
.0180
96/06
2.8900
.0
8.3-7.7
.000
.0500
96/07
6.1240
.0
7.4-7.4
.000
.1920
96/08
6.3150
.0
8.3-7.3
.000
.2270
AVERAGE
4.3732
6.0
.250
.0206
7.2900
117.5000
.1269
MAXIMUM
7.8800
25.0
8.300
6.000
.0260
11.0000
460.0000
.3170
MINIMUM
.4600
10.0
7.100
.0170
3.0000
.0120
UNIT
MGD
MG/L
SU
MG/L
MG/L
UG/L
UG/L
LBS/DAY

r .
G`KEX88/MP
10/30/96
COMPLIANCE
EVALUATION ANALYSIS REPORT
PAGE 1
PERMIT--NC0038377
PIPE --002
REPORT
PERIOD:
9409-9508
LOC ---E
FACILITY--CP&L
MAYO
S.E. (PWR
PLT)
DESIGN FLOW-- 21.0000
CLASS --2
LOCATION --RALEIGH
REGION/COUN'T'Y--05
PERSON
50050
00530
00400
00556
01002
01042
01045
01147
MONTH
Q/MGD RES/TSS
PH
OIL-GRSE
ARSENIC
COPPER
IRON
SELENIUM
LIMIT
NOL F
30.0
9.0 6.0
F 15.000
NOL
F 1.0000
F 1.0000
F 3.8000
94/09
7.7900
5.5
7.9-7.6
3.200
.0000
.0000
.1300
94/10
8.0100
5.5
7.2-7.1
.000
.0000
.0000
.2002
94/11
6.5120
4.5
7.6-7.1
.000
.0000
.0000
.1336
94/12
2.0850
4.0
7.1-7.0
.000
.0107
.0000
.0000
.0412
95/01
6.6280
3.5
7.7-7.2
.000
.0138
.0000
74.0000
.1340
95/02
8.7900
11.0
7.7-7.6
.000
10.0000
292.5000
.2800
95/03
8.4500
11.0
7.7-7.6
.000
.0000
178.0000
.2740
95/04
6.6225
7.5
7.9-7.4
.000
.0142
5.0000
100.0000
.2750
95/05
6.9520
5.0
7.6-7.3
.000
.0000
146.0000
.1760
95/06
7.9475
6.0
7.5-7.5
.000
5.0000
120.0000
.3167
95/07
7.7025
5.0
8.9-7.4
.000
.0185
.0000
72.5000
.2302
95/08
6.0720
7.5
8.8-8.6
.000
20.0000
50.0000
.0910
AVERAGE
6.9634
6.3
.266
.0143
3.3333
86.0833
.1901
MAXIMUM
13.2400
12.0
8.900
4.300
.0210
50.0000
620.0000
.4400
MINIMUM
1.0000
3.0
7.000
2.100
.0090
50.0000
.0050
UNIT
MGD
MG/L
SU
MG/L
MG/L
UG/L
UG/L
LBS/DAY

CKEX88/MP 10/30/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 1
PERMIT--NC0038377 PIPE --003 REPORT PERIOD: 9509-9608 LOC ---E
FACILITY--CP&L MAYO S.E. (PWR PLT) DESIGN FLOW-- 21.0000 CLASS --2
LOCATION --RALEIGH REGION/COUNTY--05 PERSON
50050 00310 00530 31616 50060 00400
MONTH Q/MGD BOD RES/TSS FEC COLI CHLORINE PH
LIMIT F .0125 F 30.00 F 30.0 F 1000.0 NOL 9.0 6.0
95/09 .0012 4.275 7.4-7.1
95/10 .0011 4.50 12.0
95/11 .0011
95/12 .0012
96/01 .0015
AVERAGE
.0012
4.50
MAXIMUM
.0015
4.50
MINIMUM
.0011
4.50
UNIT
MGD
MG/L
0 2.175 7.1-6.6
1.760 7.6-7.2
2.900 7.7-7.1
2.040 7.4-6.3
12.0 .0 2.630
12.0 6.300 7.700
12.0 .500 6.300
MG/L #/100ML MG/L SU

GKEX88/MP
10/30/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 1
PERMIT--NC0038377
PIPE --003
REPORT
PERIOD:
9409-9508 LOC ---E
FACILITY--CP&L
MAYO
S.E.
(PWR PLT)
DESIGN FLOW-- 21.0000 CLASS --2
LOCATION --RALEIGH
REGION/COUNTY--05 PERSON
50050
00310
00530
31616
50060
00400
MONTH
Q/MGD
BOD
RES/TSS
FEC COLI
CHLORINE
PH
LIMIT F
.0125 F
30.00
F 30.0
F 1000.0
NOL
9.0 6.0
94/09
.0014
.982
7.2-7.0
94/10
.0010
.940
7.1-6.9
94/11
.0020
1.944
7.0-6.9
94/12
.0010
5.90
19.0
.0
1.535
7.1-6.7
95/01
.0030
.00
.0
.0
3.600
7.6-6.9
95/02
.0010
10.025
7.4-6.9
95/03
.0018
4.840
7.3-7.1
95/04
.0010
10.0
2.125
7.2-7.1
95/05
.0010
4.50
7.7
5.385
7.4-6.9
95/06
.0015
5.300
7.7-7.0
95/07
.0014
2.000
7.0-6.4
95/08
.0014
1.60
6.0
.0
1.620
7.1-6.7
AVERAGE
.0014
3.00
8.7
1.9
3.358
MAXIMUM
.0030
5.90
19.0
3500.0
22.500
7.700
MINIMUM
.0010 LESSTHAN
LESSTHAN
.560
6.400
UNIT
MGD
MG/L
MG/L
#/100ML
MG/L
SU

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCO038377
PERMITTEE NAME: Carolina Power & Light Company
FACILITY NAME: Mayo Steam Electric Plant
Facility Status: Existing
Permit Status: Renewal
Major _V Minor
Pipe No.: 001
Design Capacity: No Flow Limit
Domestic (% of Flow):
Industrial (% of Flow): 100%
Comments:
Flow not limited. See description of outfall 001.
RECEIVING STREAM: the Mayo Reservoir
Class: C
Sub -Basin: 03-02-05
Reference USGS Quad: A 23 SW (please attach)
County: Person
Regional Office: Raleigh Regional Office
Previous Exp. Date: 6/30/97 Treatment Plant Class: Class 2
Classification changes within three miles:
none
Requested by:
Prepared
Reviewed by:
Date: 1/14/97
Date-. 6 Amt..
Date: C
Modeler
Date Rec.
I #
-
1iI
css�A
Drainage Area (mi2): n/a s7Q10 (cfs): Lake
Instream Monitoring: not required
Monthly Daily
Average Maximum
Wasteflow (mgd):
Free Available Chlorine (µg/1): 200 * 500
Time of Chlorine Addition: * 2 hours
Total Chromium (mg/1): 0.2 ** 0.2 **
Total Zinc (mg/1): 1.0 ** 1.0 **
pH (SU). 6 - 9
The 126 priority pollutants (40 CFR 423) exclusive of Zinc and Chromium **
Effluent sample location after mixing with fly and bottom ash, but prior to ash
pond.
* Neither free available chlorine nor total residual chlorine may be discharged
from any single generating unit for more than two hours per day, unless the
permittee demonstrates to the Division of Water Quality that discharge for
more than two hours is required for macroinvertebrate control. The 500 µg/1
limitation is an instantaneous maximum and is to be measured during the
chlorine release period. The 200 µg/1 limitation is an average during the
chlorine release period. Simultaneous multi -unit chlorination is permitted.
** Limits and monitoring are only applicable if maintenance chemicals
containing this parameter are added to the cooling towers. There shall be no
detectable discharge of the 126 Priority Pollutants contained in chemicals
added for cooling tower maintenance, except for chromium and zinc.
Compliance with this limitation may be determined by engineering
calculations which demonstrate that the regulated pollutants are not
detectable in the final discharge by methods in 40 CFR 136.
This permit does not authorize a discharge directly to the Mayo Reservoir except
during times in which the cooling tower(s) are drained. The permittee shall
notify the Division of Water Quality, Raleigh Regional Office, prior to draining
the cooling tower(s), except during non -office hour emergencies when
notification must be made the next working day. The above listed limitations
for the pollutants shall apply during the draining of the cooling tower(s).
Sampling shall be conducted during the time of the event at the cooling tower
blowdown area. The above listed effluent characteristics and pH shall be sampled
daily while draining the cooling tower(s).

FOR APPROPRIATE DISCHARGES, LIST COMPLETE GUIDELINE LIMITATIONS BELOW
l Cooling tower blowdown. This water is usually directly mixed with the ash sluice water. Occasionally (once per year maximum
(if ever)) it is not mixed with bottom and fly ash and is discharged directly into the ash pond. Heat exchanger water (low volume
waste) is almost continuously discharged out 001. Approximately once every two years the cooling towers are drained
completely for maintenance. This discharge goes directly to the Mayo Reservoir. The established permit limits still have to be met
with this discharge (see attached flow chart for further clarification).
2 This provision applies to outfall 001 since low volume wastewater is discharged through this outfall. I believe these limits were
v not applied to this outfall in the last renewal because these parameters are monitored at outfall 002. Outfall 001 discharges into
► jR"` '-� the ash pond and the ash pond then discharges into the Mayo Reservoir through outfall 002. The limits are being met at outfall
002 so it would not make sense to monitor there parameters at outfall 001. See attached flow diagram for clarification.
Electricity (the facility is an electric 1 745 4U CPR Part 423 - Steam Plectnc Power
generating plant using coal-fired boilers to Generating Point Source Category
produce steam for turbine generators with a
combined net capacity of 745 MWe.
cent :....haractersEtc:.:...;':
::.:.. ......
nflI ::.::....;:.>
atl :x�mu[m .<<:»:.:":m,ents
............
::_:: ........:.....::.:
Aa...:;:
;::Y..:::
H
Shall be in the ran
e of 6.0 to 9.0.40
CFR 423.12 (b)(1) BPT
TSS2
30.0 m
100.0 m40
CFR 423.12 (b)(3) BPT
Oil and Grease2
15.0 m
20.0 m40
CFR 423.12 (b)(3) BPT
Free Available Chlorine
0.20 m
0.50 mrd
40 CFR 423.13 (d)(1) BAT
126 Priority Pollutants
No Detectable Amount
40 CFR 423.13 (d)(1) BAT
Chromium, Total
0.20 m
0.20 m
40 CFR 423.13 (d)(1) BAT
Zinc, Total
1.0 m
1.0 m
40 CFR 423.13 (d)(1) BAT
40 CFR 423.13 (d)(2) BAT
40 CFR 423.13 (d)(3) BAT
l Cooling tower blowdown. This water is usually directly mixed with the ash sluice water. Occasionally (once per year maximum
(if ever)) it is not mixed with bottom and fly ash and is discharged directly into the ash pond. Heat exchanger water (low volume
waste) is almost continuously discharged out 001. Approximately once every two years the cooling towers are drained
completely for maintenance. This discharge goes directly to the Mayo Reservoir. The established permit limits still have to be met
with this discharge (see attached flow chart for further clarification).
2 This provision applies to outfall 001 since low volume wastewater is discharged through this outfall. I believe these limits were
v not applied to this outfall in the last renewal because these parameters are monitored at outfall 002. Outfall 001 discharges into
► jR"` '-� the ash pond and the ash pond then discharges into the Mayo Reservoir through outfall 002. The limits are being met at outfall
002 so it would not make sense to monitor there parameters at outfall 001. See attached flow diagram for clarification.
Electricity (the facility is an electric 1 745 4U CPR Part 423 - Steam Plectnc Power
generating plant using coal-fired boilers to Generating Point Source Category
produce steam for turbine generators with a
combined net capacity of 745 MWe.

r
' GKEX88/MP 10/30/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 1
PERMIT --N00038377 PIPE --001 REPORT PERIOD: 9509-9608 LOC ---E
FACILITY--CP&L MAYO S.E. (PWR PLT) DESIGN FLOW-- 21.0000 CLASS --2
LOCATION --RALEIGH REGION/COUNTY--05 PERSON
50050 00400 00665 50064
MONTH Q/MGD PH PHOS -TOT CHLORINE
LIMIT F21.0000 9.0 6.0 NOL F .200
95/09 4.1294 7.7-7.7 .000
95/10 3.1461 7.3-7.3 .000
95/11 3.8793 7.9-7.9 .000
95/12 4.5545 7.7-7.6 .000
96/01 4.3216 7.8-7.8 .000
96/02 3.8953 10.000F
96/03 4.3664 9.500F
96/04 7.6-7.4 .000
�a
96/05
96/06
96/07 1.8841 .021
96/08 1.5790 .000
AVERAGE 3.5284 1.952
MAXIMUM 6.2500 7.900 10.000
MINIMUM .0000 7.300 .000
UNIT MGD SU MG/L MG/L

GK�FY.88/MP
10/30/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 1
PERMIT--NC0038377
PIPE --001
REPORT PERIOD: 9409-9508 LOC ---E
FACILITY--CP&L MAYO S.E.
(PWR PLT)
DESIGN FLOW-- 21.0000 CLASS --2
LOCATION --RALEIGH
REGION/COUNTY--05 PERSON
50050
00400
00665
50064
MONTH
Q/MGD
PH
PHOS -TOT
CHLORINE
LIMIT F21.0000
9.0 6.0
NOL
F .200
94/09
3.8653
7.9-7.9
.000
94/10
3.8858
7.8-7.4
.000
94/11
3.8939
7.5-7.2
.000
94/12
3.7853
6.9-6.9
.000
95/01
3.9483
7.3-7.3
.000
95/02
3.9407
7.7-7.7
.000
95/03
3.9258
7.7-7.7
.000
95/04
3.9370
7.7-7.7
.000
95/05
3.8983
7.7-7.2
.000
95/06
3.8880
7.3-7.2
.000
95/07
4.4854
7.8-7.2
.000
95/08
4.8854
7.8-7.1
.000
AVERAGE
4.0282
.000
MAXIMUM
6.5600
7.900
MINIMUM
3.6000
6.900
.000
UNIT
MGD
SU
MG/L
MG/L