ML20092K234

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Revises 941014 Request for Mods of Thermal Limitations for Outfall 001,changing Daily Average Temp Limitation of 95 F to Weekly Average Temp
ML20092K234
Person / Time
Site: Catawba  Duke Energy icon.png
Issue date: 09/20/1995
From: Carter J
DUKE POWER CO.
To: Eleazer T
SOUTH CAROLINA, STATE OF
References
NUDOCS 9509250291
Download: ML20092K234 (8)
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Text

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                  . September 20,' 1995                                                                                           j

,i i i j < Mr. Timothy M. Eleazer 

                  ! Industrial and Agricultural Wastewater Division                                                              j

~ South Carolina Department of Health and Environmental Control - jl 2600 Bull Street Columbia, SC 29201

Subject:

               ' Catawba Nuclear Station -NPDES Permit No. SC0004278                               l Revised Thermal Limitation Request                                                i File: CN-702.13                                                                   l
                                                                                         ~~      -. ~ .~ _~     ~                 l

Dear Mr. Eleazer:

                                                                                            ]
Upon review of the proposed thermal limitations which were requested for outfall 001 it has been determined that the station will not be able to ' meet these limits during typical hot ,

I summer operational conditions. Therefore, we are requesting that the wording be changed to read as follows:

  • The temperature of the effluent shall not exceed a weekly average temperature of 50*F when the' weekly average intake mperature is below 36.5*F. The effluent shall not exceed two times the intake temperature minus 23 *F when the intake temperature ranges from 36.5 *F to 55 'F. When the intake temperature exceeds 55 *F the effluent shall not --._

exceed a weekly average temperature of 95 *F. We are requesting that the daily average temperature limitation of 95 *F be changed to a weekly average temperature. Attached for your use please find the original request submitted on October 14,1994, that was based on station operational data through 1992. This request is made based upon a review of the past three years of thermal data for the station. Please find attached a spreadsheet showing how the presently worded thermal 

                      - limitation wohld effect the Catawba facility. This spreadsheet shows July and August                       ,

i 

                    . temperature data from outfall 001 and compares this data with the limitations in the October
                      -14,1995 memo. This shaded portions of the spreadsheet shows days in which Catawba would not meet the limiMtion.                                                                                    1 i

l 9509250291.950920 l PDR- ADOCK 05000413 -! 

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i There were a total of 29 days in 1995 and 22 days in 1993 that would have resulted m permit-  ; . violations under the previously proposed wording. As can be seen on the table, we feel that, l these 51 ~ days which were over the proposed limit are due primarily to warm intake  : temperatures which the station can not control. The temperature change contributed by the

station was very low on many of the days which are shaded in the table. ,

On going environmental monitoring studies in Lake Wylie support this request. We are 1 requesting that you meet with Bruce Gibson to discuss this matter. Should you have any 

  - questions concerning this letter please give John Estridge a call at (704) 875-5965.                      j Sincerely, 4

9.J. coa ohn S. Carter, TechbcNystems Manager l Environmental Division, Water Protection  ! Jte/477 l cc: NRC Dw..; DistributionI.ist i

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CATAWBA NUCLEAR STATION j

OUTFALL 001 TEMPERATURE EVALUATION a e DATE 1995 1995 1995 1995 1995 1994 1994 1994 1994 1993 1993 l 1993 l 1993 ', 001 7 DAY 001 7 DAY 001 7 DAY j DISCH 7 DAY AVG DAILY DISCH 7 DAY AVG DAILY DISCH 7 DAY AVG DAILY intake T TEMP AVG > 93.2 AVG > 95 TEMP AVG > 93.2 AVG > 95 TEMP AVG > 93.2 AVG > 95 

.       14ul     84.20             88.02  87.68   FALSE FALSE       88.32   88.54  FALSE   FALSE   91.89  90.26 l FALSE l FALSE 24ul     85.22             88.74  88.00   FALSE FALSE       89.13   88.54  FALSE   FALSE   91.93  90.70 l FALSE l FALSE l

34ul 86.78 89.42 88.38 FALSE FALSE 89.15 88.54 FALSE FALSE 92.01 90.92 l FALSE l FALSE 44ul 86.39 89.51 88.67 FALSE FALSE 90.04 88.89 FALSE FALSE 92.25 91.23 l FALSE l FALSE 6-Jul 87.92 89.97 88.87 FALSE FALSE 91.00 89.21 FALSE FALSE 92.23 91.49 l FALSE l FALSE i edul 86.43 90.24 69.12 FALSE FALSE 91.60 89.63 FALSE FALSE 92.07 91.89 l FALSE l FALSE t 74ul 86.22 90.09 8b <3 FALSE FALSE 91.47 90.10 FALSE FALSE 92.26 92.09 l FALSE l FALSE j 8-Jul 88.01 90.17 59.73g."ALSE FALSE 91.52 90.56 FALSE FALSE 92.23 92.14 l FALSE l FALSE 94ul 87.89 90.40 89.97 l FALSE FALSE 90.36 90.73 FALSE FALSE 92.47 92.22 l MLSE l FALSE , 104ul 88.72 90.97 90.19 l FALSE FALM 90.25 90.89 FALSE FALSE 92.77 92.33 l FALSE l FALSE

114ul 88.94 92.01 90.55 l FALSE FALSE 89.73 90.85 FALSE FALSE 93.89 92.56 l FALSE l FALSE 124ul 90.41 92.71 90.94 l FALSE FALSE 91.0 90.91 FALSE FALSE 93.13 92.69 l FALSE l FALSE 1 134ul 90.53 92.46 91.26 l FALSE FALSE, 92.01 90.97 FALSE FALSE 93.59 92.90 l FALSE l FALSE
144ul 90.27 92.41 91.59 l FALSE - FALSE 91.60 90.99 FALSE FALSE 92.28 92.91 l FALSE l FALSE 7

154ul 89.74 93.10 92.01 FALSE FALSE 92.54 91.13 FALSE FALSE 93.11 93.03 FALSE FALSE 164ut 89.97 94.12 92.54 FALSE FALSE 93.11 91.52 FALSE FALSE 94.81 93.37 ! 174ul 90.78 94.06 92.98 FALSE FALSE 93.08 91.93 FALSE FALSE 95.22 93.7 184ul 91.71 94.40 93.32 FALSE 92.75 92.36 FALSE FALSE 95.10 93.89 { FALSE FALSE 93.60 93.96 FALSE

194ul 90.76 93.21 93.39 FALSE 93.07 92.59 j 204ut 89.91 92.57 93.41 FALSE 93.82 92.85 FALSE FALSE 94.88 94.14 FALSE 214ul 89.20 92.99 93.49 FALSE 93.77 93.16 FALSE FALSE 94.47 94.46 FALSE -

i W W 93.44 93.54 FALSE 92.79 93.20 FALSE FALSE 94.84 94.70 FALSE l 234ut 89.89 93.34 93.4 FALSE 92.54 93.12 FALSE FALSE 95.30 94.77 1 244ul 89.33 92.65 93.23 FALSE 92.47 93.03 FALSE FALSE 94.90 94.73 FALSE $ W W 93.36 93.08 FALSE FALSE 92.67 WIdL5E FALSE 94.66 94.66 FALSE W W 93.58 93.13 FALSE FALSE 92.15 W FALSE FALSE 94.72 S4.82 FALSE i W 89.87 92.65 93.14 FALSE FALSE 91.90 W FALSE FALSE 94.66 94.79 FALSE l W W 93.37 93.20 FALSE FALSE ~EW FALSE FALSE 95.10 94.88 294ul 89.77 93.79 93.25 FALSE 91.50 92.07 FALSE FALSE 95.55 94.98 i 304ul 90 94 93.83 93.32 FALS' 91.37 91.90 FALSE FALSE 95.27 94.98 E 93.98 93. 91.49 g FALSE 95.11 95.01 L e 

                              .                           ~                                                   - .

P 4 i CATAWBA NUCLEAR STATION OUTFALL 001 TEMPERATURE EVALUATION 4 DATE 1995 1995 1995 l 1995 l 1995 1994 1994 1994 1994 1993 1993 l 1993 l 1993 001 7 DAY 001 7 DAY 001 7 DAY DISCH 7 DAY AVG DAILY DISCH 7 DAY AVG DAILY DISCH 7 DAY AVG DAILY intake T TEMP AVG > 93.2 AVG > 95 TEMP AVG > 93.2 AVG > 95 TEMP AVG > 93.2 AVG > 95 1-Aug 90.68 94.04 331.28 FALSE 91.41 329.38 TRUE FALSE 94.20 332. FALSE 2-Aug 90.15 93.90 331.32 FALSE 91.66 I2U2 TRUE FALSE 93.87 332.0 FALSE l 3.Aug 89.34 94.16 331. FALSE 91.97 329.33 TRUE FALSE 93.85 331.99 FALSE l 44ug 89.72 93.80 331. FALSE 92.10 329.44 TRUE FALSE 93.04 331.74 FALSE j 5 Aug 88.29 93.74 531. FALSE 91.76 329.47 TRUE FALSE 92.71 331.38 FALSE 

                                                                                                                  ]

64ug 87.56 93.28 331.4 FALSE 91.52 329.49 TRUE FALSE 92.72 331.06 FALSE ' , 7 Aug 87.49 92.91 93.69 FALSE 91.31 91.67 FALSE FALSE 91.40 93.11 FALSE FALSE , 8 Aug 86.74 91.45 93.32 FALSE 91.33 g FALSE FALSE 90.31 92.56 FALSE FALSE 9 Aug 86.55 91.66 93.00 FALSE FALSE 91.27 91.61 FALSE FALSE 90.46 92.07 FALSE FALSE 

  ~10.Aug   87.45     92.61 92.78 l FALSE l FALSE  91.55  91.55  FALSE   FALSE   90.76 91.63 l FALSE l FALSE

, 11-Aug 88.66 I 93.22 92.70 l FALSE l FALSE 91.75 91.50 FALSE FALSE 90.70 91.29 l FALSE l FALSE 12 Aug 90.46 93.24 92.63 l FALSE l FALSE 91.80 91.50 FALSE FALSE 89.39 90.82 l FALSE l FALSE 13Aug 91.02 93.60 92.67 l FALSE l FALSE 91.83 91.55 FALSE FALSE 90.51 90.50 l FALSE l FALSE 14#Jg 92.07 93.95 92.82 l FALSE l FALSE 91.57 91.58 FALSE FALSE 90.43 90.36 l FALSE l FNSE 2 15-Aug 92.73 94.10 93.20 FALSE FALSE 90.79 g FALSE FALSE 91.04 90.47 l FALSE l FALSE 16 Aug 92.29 94.96 93.67 FALSE 90.91 91.46 FALSE FALSE 90.98 90.54 FALSE FALSE 17-Aug 92.52 94.76 93.97 FALSE 90.30 91.28 FALSE FALSE 91.32 90.62 FALSE FALSE 18-Aug 92.71 95.23 94.26 90.01 91.03 FALSE FALSE 92.31 90.85 FALSE FALSE 19-Aug 91.03 94.87 94.50 FALSE 89.83 90.75 FALSE FALSE 92.16 91.25 FALSE FALSE 20-Aug 89.38 94.20 94.5 FALSE 89.07 90.35 FALSE FALSE 91.75 91.43 FALSE FALSE 21 Aug 88.81 93.01 94.45 FALSE 88.49 89.91 FALSE FALSE 91.51 91.58 FALSE FALSE 22 Aug 89.44 92.84 94.27 FALSE 87.95 W FALSE FALSE 92.33 91.77 FALSE FALSE 

                                                                                                              ~

. 234ug 89.61 93.97 94. FALSE 88.83 89.21 FALSE FALSE 91.91 91.90 FALSE FALSE l 244ug 88.66 93.81 93.99 FALSE 89.08 89.04 FALSE FALSE 91.79 91.97 FALSE FALSE 25 Aug 88.25 93.75 93.78 FALSE 89.10 88.91 FALSE FALSE 91.58 91.86 FALSE FALSE 26 Aug 87.11 93.06 93.52 FALSE 89.50 88.86 FALSE FALSE 91.81 91.81 l FALSE l FALSE 27 Aug 85.32 91.36 93.11 l FALSE l FALSE 89.78 88.96 FALSE FALSE 92.45 91.91 l FALSE l FALSE 284 ug 84.41 90.30 92.73 l FALSE l FALSE 89.91 89.17 FALSE FALSE 92.06 91.99 l FALSE l FALSE 29-Aug 35.73 90.59 92.41 ' FALSE l FALSE 90.00 89.46 FALSE FALSE 92.28 91.98 l FALSE l FALSE 30-Aug 87.53 90.18 91.86 FALSE l FALSE B4.95 88.90 FALSE FALSE 93.23 92.17 l FALSE l FALSE 31 Aug 64.92 90.58 91.40 FALSE l FALSE 87.90 88.73 FALSE FALSE 93.9) 92.47 l FALSE l FALSE 19 l 1 l 22 l 4 l

f. .

f .I- _ < Duke l'ouer Co{npany Centration Selvices Department < 13319 Hagers l'erry Road lluntersudle, IVC 28078 7919 ' . ounspowen 

       . October 14,1994                           ,

l l 1. ! Mr. Bmce Gibson Water Quality Assessment Division . South Carolina Department of Health and Environmental Control I 2600 Bull Street [ Columbia, South Carolina 29201 i a'

Subject:

Catawba Nuclear Station

j. NPDES Permit #SLM278 316(a) Demonstration
.                              Meeting Summary File: CN-702.13

Dear Mr. Gibson:

Bruce, thank you for setting up the meeting on October 10, 1994, with you, Tim 

       - Eleazar of SCDHEC, Tim Harris of Catawba Nuclear Station (CNS), and me to review and discuss the 316(a) demonstration reports for CNS. The following is a >             sry of our meeting and proposed permit revisions. Our discussion focused on the substitution           -

of the EPA nomograph for delta T limits in the present CNS permit, review of thermal plume data, and continuation of the on-going Lake Wylie environmental monitoring program: The following modifications of the thermal limits in the NPDES permit 

       ; included the assignment of a thermal mixing zone at outfall 001 with the proposed limits:
                   . The temperature of the effluent shall be such as not to exceed a weekly average temperature of 10'C (50*F) when the weekly average intake temperature is
                   - below 2.5'C (36.5'F), exceed two times the intake temperature (*F) minus 23 when the . weekly average intake temperature ranges from 2.5'C (36.5'F) to 12.8'C (55'F), exceed a weekly ave age temperature of 34*C (93.2'F), and exceed a daily average temperature of 35'C (95'P).
       . A marked up copy _of Part I page 3 of 31 for outfall 001 in the NPDES permit is attached with a suggested format for the permit modification. If you have any_
          .m .:,,.r ..w ..

i i questions dr suggestions once you have reviewed these proposed thermal modifications, please call me - (704-875-5968). For incorporation of these. changes with other requested modificaticas of this permit, please contact John Estridge (704-875-5965).  ! Also thanks for sharing of your current monitoring program to determine metals and pesticide concentration in the tissue of largemouth bass and catfish. I will forward this information and your suggestions on environmental monitoring to our monitoring staff , to consider inclusion inen-going environmental programs to address public concerns  ; 

 .           -and support NPDES permitting of DPC facilities.                                                ;

i i Sincerely, . 4 

                   .    -    UA. Abs Ronald E. Lewis. Scientist Environmental Division                                                                         -

Generation Services Department REL Attachment xc: Tim Eleazer, SCDHEC 4 4 9 9 R d 9 t

A L EFFLUENT LIMITATIONS AND MONIT02ING REQUIREMENTS Phase II-

1. During the period beginning on May 1, 1994 and lasting through the expiration date, the Permittee'is authorized '

to discharge from outfall(s) serial number (s) 001: once through cooling water, nuclear ' service water, cooling tower blowdown (discharged via internal Outfall 005) and liquid radiological-wastes (treated and discharged via internal Outfal 004)~to Lake Wylie. - Such discharge shall be limited and monitored by the'Pennittee as specified below: - EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS t@ ITORING REQUIREMENTS' kg/ day (lbs/ day) Other Units (Specify) Monthly Daily Monthly Daily Measurement Sample . Averaoe Max. Averaoe h Freouency Type Flow-m3/ day (MGD) - - MR MR Daily Continuous ** 

                     *** Total Residual Chlorine                                                -               -

less than 0.10 mg/l Multiple Grabs

  • 1/ week Intake Temperature - - -

Daily Continuous x mDischarge Temperature - - Daily Continuous T aparatur; ri:: (^.pril S:pt;;..tcr)- 5.S*C(10.0*f) 0;;1, Celcol et-;e , T=per:tur: ri:: (0 t:5:r M:rch) 7.**C(10.0*f) 0;;1y Cel col et ;o,i- 

                               *See Part III, Special Condition #16                                                     MR = Monitor and Report
                            **See Part III, Special Condition #17                                                       Based on a flow of 82.5 MG0 W****See     e-~ rns&,     oart IIISpecial Cof dition #18                            .

tre pose. %esi Ls% o-{- \an 6 M 3 ' M gp* No chromium and zinc based maintenance chemicals will be allowed in the cooling tower. y;y g

2. The pH shall be monitored and reported once per week by grab sample. [gex l 3.

There shall be no discharge of floating solids or visible foam in other than trace amohnts; nor, shall .E D

the effluent cause a visible sheen on the receiving waters.
                                                                                                                                                                                                                                  .e J

n

4. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location (s): The intake tersperature shall be monitored at or near the plant intake. All $

other parameters shall be monitored at or near the point of discharge from Outfall 001 prior to 

                                                                                                                                                                                                                                .      g      -

t mixing with the receiving waters, unles,s otherwise specified above. y i o ________-___.___m_ _ _ _ _ _ . -__i_______._._+ 

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