ML20085M581

Status Rept-Fish Kill Action Plan 1st Quarter 1990

ML20085M581
Person / Time
Site:	Summer
Issue date:	03/31/1990
From:	Summer S SOUTH CAROLINA ELECTRIC & GAS CO.
To:
References
RTR-NUREG-1437 AR, NUDOCS 9111110198
Download: ML20085M581 (28)

Text

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ST ATUS REPORT - FISH KILL ACTION PLAN 3

1st Quarter 1990 Actions to date:

1. Eleven temperature monitors have been has installed been in the circulating good, except from water one discharge bay and canal Data recoverf monitor damaged by fishermen a

2. Operational histories of the Fairfield Pumped Storage Facility (FPFS) and the I Virgil C. Summer Nuciear Station (VCSNST have been reviewed

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3. Origin of the circulating water discharge bay design was investigated

4. Tne role of the discharge bay on heat dissipation was investigated

5. Fish counting equipment from the South Carol.na Wildlife and Marine Pesources Department (SCWMRD) was evaluated f or use at VCSNS 6 ictwm sampling was conducted in the canal area

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1. The design of the discharge bay was primarily due to the topography of the area curing sunstruction The bay has no design f unction related to heat dissipation 2.

Heat loss in the discharge bay was not consHered in the mathem3tical thermal plume model Heat 'o s in the bay / canal system appears to be 'ess than 1 f 3

The SCWMRD fish counting equipment was tested in the circulating water discharge canal It was determined that the equipment would have hmited usefulness and similar equipment was not purchased 4 The operational histories of FPSF and VCSNS were evaluated for any coirelations between operation and fish kills The following generalizations can be made after review of the fish kills to date A A fish kill can occur if, after a VCSNS plant trip or outage, the circulating water discharge temperature (measured at the condenser',) reaches 107 -

1091 A fish kill can occur, without a VCSNS plant trip or outage, if circulating water discharge temperatures reach 104 109"F and the level of B.

Monticello Reservoir drops significantly (apr = oximately 424 5 feet3.5 feet) after followed by reaching near full pool (maamum level minimem level ,4216 feet The rate of lake level drop does not appear to be a f actor. The amount of time that the lake ievel remains above 424.5 feet may be a f actor There have been no observed fish kills when the circJlating water discharge temperatures consistently exceed 109"F 9111110198 900331 PDR NUREG 1437 C PDR

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This'implier that, when the discharge temperatures are .this high, '

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recolonization by fish does not occur.

5. Bottom sampling revealed ~ a very dense-as.atic clam population in the

- circulating water-discharge canal. The bottom of the' canal is covered in crushed stoner There was no sign of sedimentation on the canal bottom.

4

6. Initial' data f"sm temperature monitors indicate that cool water intrusion into

. the dischartv bay is not evident during the tooler months.

Temperature mosutoring will continue through the summer. Flow monitoring in the .

^ discharge canal v ll begin when the circulating water flow is reestablished after the

_ outage.

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ATTACHMENT 2 First Quarter 1990 Summary Report South Carolina Electric & Gas

. . o,, . . w. . - .

Corporate Health Physics and Environmental Procrams CGSP 0463-HPE sa Fish Kill Action Plan - 1st Quarter 1990 cm. April 16,1990 j Status Report 1 L A. Blue a n.m..e ..

Re: Summary of Meeting with Val Nash of the South Carolina Wildlife and Marine Resources Department (SCWMRD), Apol 12,1990 Attendees: Val Nash, District Fisheries Biologist, SCWMRD Steve Summer Phil Moore Chuck McKinney The following items were discussed (see attached status report).

1. suspected fish kill mechanisms

! 2. design of discharge bay and canal

3. fish counting equipment

4. heat dissipation in bay / canal area

5. locations of monitoring equipment

6. .emperature data collected to date l

There was a consensus that monitoring needed to continue at least through this l summer. We discussed SCE&G's reasons for wanting to wait until the fall 1991 outage to make any changes,if necessary, to the discharge area. It was stated that l

the primary reasons were logistical or budgetary in nature and did not reflect desire to postpone any response. Mr. Nash also asked if we had addressed the possibility of mitigation. We replied that SCE&G had offered to restock the lake with fish to compensate for those killed, but that the SCWMRD had not considered the offer acceptable. It was not clear to us if Mr. Nash was referring to monetary compensation or if the SCWMRD would consider monetary compensation as I mitigation. It is our understanding that the gold mine operation in Fairfield County is paying money to help mitigate wildlife impacts at their f acility.

P. A, Blue  !

' CG5P-0463-HPE j

, Page 2 of 2

This meeting and future quanerly meetings should help increase the level of understanding between SCE&G and the SCWMRD. The next meeting will be scheduled in July 1990.

e -m _ -

Stephen E. Summer, Supervisor Environmental Programs mn j Attachment l

cc: K. W. Nettles C. J. McKinney P. R. Moore NPCF File 10.5010 l

l l

l

,- ATTACHMENT 2 Fish Kill Action Plan sogin,c.,oj no necme a c.. comi ony oge s 8,.enom ,

me .. oceuxns enginge se axs SCE&G um , August 23, 1989 Mr. H. J. Logan Chief of Fisheries South Carolina Department of Wildlife and Marine Resources P. O. Box 167 Columbia, South Carolina 29202

Subject:

Virgil C. Summer Nuclear Station Discharge Canal Fish Kills

Dear Mr. Logan:

I would like to express my appreciation for the opportunity you and Mr. Nash provided my staff on July 31, 1989 to discuss the fish kill incidents which have been occurring at the Virgil C. Summer Nuclear Station. This meeting has helped formalize the next steps in our investigation of this problem and hopefully will result in a reasonable means of preventing future fish kills.

Attached to this letter is a summary of issues discussed during this meeting and the resulting actions planned by South Carolina Electric & Gas Company (SCE&G). On completion of this invest'gation SCE&G will analyze the results and provide the South Carolina Department of Wildlife and Marine Resources and the Department of Health & Environmental Control our proposed corrective actions to resolve this problem.

Please advise if you have any further questions or recommendaticns in regards to this matter.

Very truly yours, O. S. Bradham CJM:0SB/lcd Attachments c: M. 3. Quinton K. W. Hettles W. M. Lide, Jr.

S. E. Summer Val Nash L. A. Blue R. R. Mahan NSRC RTS (EPA 890006)

File (809.06-1)

o Action Plan for Investigation into the Causes of Fish Kills at the V. C. Summer Nuclear Station The investigation into the cause or causes of fish kills in the V. C. Summer Nuclear Station circulating water discharge bay and canal will concentrate on the apparent contribution of the shape of the discharge bay (see Figure 1). Tht: following items will be evaluated:

1. Was the discharge bay part of the original circulating water discharge design?

Was the loss of heat in the discharge bay included in the thermal plume model calculations?

3. How does the operation of V. C. Summer Nuclear Station influence the occurrence of fish kills?

4. How does the operation of Fairfield Pumped Storage Facility and the associated fluctuation in lake levelinfluence the occurrence of fish kills?

5. How does the temperature distribution in the discharge bay and canal vary with lake level, VCSNS power level, meteorological conditions, and ambient lake temperature? 11 the deep water areas of the discharge bay create a cool water refuge area, how extensive is the refuge (vertically and horizontally)?

6. Determine if subsurface flows of cool water through the canal into the discharge bay exist and under what conditions they exist. Do flow patterns and velocities change or remain constant?

7. Under what conditions do fish utilize the discharge canal and bay? Is there movement into and out of the bay?

After these items are addressed, possible corrective actions will be evaluated. These actions may include changes to the design of the discharge canal or bay and the use of fish deterrents such as physical and psychological barners if physical changes to the circulating water discharge are implemented, additional thermal mapping in Monticello Reservoir may be neeoed to evaluate the continued validity of the thermal plume model.

Because of the time necessary to procure equipment and since much of the pertinent information can only be gathered during the summer months when fish kill conditions exist,it is oroposed that information gathering begin as soon as possible and continue throug a the summer months of 1990. A discussion of each of the items to be evaluated, proposed methods, and expected completion dates follow.

Item #1 - Discharge design The original design of the discharge area will be investigated to determine if the discharge bay was part of the original design or if the creation of the discharge bay was a matter of convenience.

Expected completion October,1989

W' Item #2 Heat Loss The thermal plume model will be evaluated to determine if the dissipation of heat in the discharge bay was considered in the mathematical thermal plume model.

Expected completion - October,1989 Item #3 V. C. Summer Nuclear Station (VCSNS) Operation The operation of VCANS and its relationship to fish kills will be evaluated.

Factors to be reviewed include circulating water flow and intake / discharge temperatures.

Expected completion - January,1990 Item #4 - Fairfield Pumped Storage Facility (FPSF) Operation The operation of FPSF and its relationship to fish kifts in the VCSNS circulating water discharge area will be evaluated. Factors to be reviewed will include normal operational patterns and experienced deviations.

,- Expected completion - January,1990 Item #5 - Temperature Distribution l The fluctuation of temperature in the discharge bay and canal will be l evaluated. Vertical profiles will be developed where possible. Figure 2 shows I proposed ~ temperature monitor locations.

Expected completion September,1990 item #6 - Flow Flow measurements will be taken in an effort to deterrnine if cool water is flowing through the discharcae canal and into the discharge bay. Flow measurements in the canal will also be used in the evaluation of design of possible fish barriers.

! Expected completion - September,1990 item #7-Fish Utilization of the Discharge Area An attempt will be made to characterize the conditions under which fish inhabit the discharge bay and canal. Potential methodology includes th'e use of a boat mounted depthfinder, gillnets, or fish counting equipment in the discharge canal. Methods used will depend.on regulatory agency approval and the cost of fish counting equipment.

Expected completion September,1990 After all data gathering and evaluation is completed the findings will be considered and any potential corrective actions will be submitted to SCE&G management. A decision can then be made on the most appropriate actions to pursue. Since the

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decision making process is dependent on the information gathered during the  !

evaluation of the seven items presented earlier, no proposed completion date for the acceptance or implementation of any corrective actions can be given at this time.

A report on the evaluation of the seven items, which will hopefully define the conditions under which fish kills can occur in the discharge area, will be presented to the South Caroline Department of Health and Environmental Control and the South  ;

Carolina Wildlife and Marine Resources Department by January 1,1991.

l

MONTICELLO RESERVOIR

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. 3 SERVICE WATER POND Discharge Canal i

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Discharge Bay

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CIRCULATING WATER DISCHARGE L

Figure 1 Circulating Water Discharge Area V. C. Sumer Nuclear Station l.

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MONTICELLO RESERVOIR i

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a SERVICE'NATER POND sb o

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-* . Monitor s,b locations i s - Surface monito1 J b - Bottom monitor-m - mid water moni' CIRCULATING WATER DISCHARGE Figure 2 Proposed Location of Temperature Monitors V. C' Sumer Nuc1 car Station .

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, ATTACHMENT 2 Sam Fish Kill Report h sogin cero n. ocom a on comp.ay g.,serronem n e w o m atens gen., ;4sc mes scEac July 20, 1989

.au Mr. Val Nash South Carolina Department of Wildlife and Marine Resources 923 Hollis Lakes Road Rock Hill, South Carolina 29753

Subject:

Virgil C. Summer Nuclear Station Fish Kills - Discharge Canal

Dear Mr. Nash:

Please find attached a copy of the final report submitted to the South Carolina Department of Health & Environmental Control in regards to the most recent fish kills which occurred in the discharge canal of the Virgil C. Summer Nuclear Station. South Carolina Electric & Gas Company submitted a preliminary report on this issue in a letter dated June 30, 1989.

Should you require any further information, please contact Mr. Charles McKinney

! cf my staff at your convenience.

Very truly yours [

/A -

km

0. S. Bradham l

CJM/0SB: led Attachment l

l c: M. B. Williams

) W. R. Baehr l

S. E. Summer W. R. Higgins W. F. Bacon W. M. Lide, Jr.

R. R. Mahan R. L. Prevatte NPCF RTS (ONO 890053)

Files (818.05 & 809.06-1)

.~- . .. - - . .~ . . - . . - . - - . _ - . . - - . - . . . - - . - ..-

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,,- on e 5, Desdham

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$0uth Carohne (fcCtfic & -

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,s gen;ngs, cam SCE&G-

• • July 20, 1989-Mr. William-R. Krecker-Environmental Quality Manager Water Quality Assessments & Enforcement

-Division South Carolina Department of Health

& Environmental Control

-2600 Bull Street Columbia, South Carolina 29201

Subject:

Virgil C. Summer Nuc1 car Station Docket No. 50-395 Final Report-

' Fish Kills June 24-July 10, 1989

Dear Mr..Krtcher:

South Carolina Electric _& Gas Company (SCELG) herein submits the final report concerning fish kills in the Virgil C. Summer Nuclear Station 'VCSNS) discharge canal between the dates:of June 24 and July 10, 1989.- The enclosed report describes the' current events and probable cause.

In accordance with the VCSNS Operating License NPF-12 Appendix B, a copy of

.this report is being provided to the Nuclear Regulatory Commission.

> Additionally, a copy of this report will also be provided to the South?

Carolina Department of Wildlife & Marine Resources per the request of Mr. H.

J. Logan, Chief of. Fisheries.

'Should-you require any further information, please contact Mr. Charles McKinney of my staff at.your convenience.

Very truly yours,

/WkWk'gT 0, S. Bradham CJM/OSB: led Attachment

-c: M.'B. Williams W. R.-Baehr S. E. Summer W. R. Higgins W.-F. Bacon

W.-- M. Lide', Jr.

Document Control (NRC)

R. L. Prevatte NPCF RTS (ONO 890053).

Files.(818.05 & 809.06-1)

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i Fish Kill Report June 1989 On-June 26,1989, dead catfish were discovered in the circulating water discharge

'oay and canal area at the V C. Summer Nuclear Station (see Figure 1). Because of the advanced state of decomposition of these fish,it was estimated that the fish were probably killed late on 6/24/89. The South Carolina Department of Health and Environmental Control, the South Carolina Wildlife and Marine Resources-Department and the Nuclear Regulatory Commission were notified of the fish kill. A preliminary report was submitted to the South Carolina Department of Health and Environmental Controf on 6/30/89 (attached).

Observations were made of the discharge area on a daily basis from 6/26/89 to 7/10/89. During this time. period,167 dead fish were noted in the discharge area. Of these fish, one was alargemouth bass, two were white bass, and the remainder were catfish. Approximately ninety percent of the catfish were white catfish; approximately ten percent were channel catfish. Table 1 presents the numbers of fish and the dates observed. Since there were no unusual discharges from the V. C.

Summer Nuclear Station,it appears that the fish kill was due to thermal conditions present in the circulating water discharge area.

Fish kills have occurred m this area during this time of year in the past. In anticipation of a fish kill, a temperature monitor was installed on May 25, '1989 in the discharge bay at a depth of approximately 30 feet. Data from previous fish kill investigations have suggested that fish were being trapped in a deeper area of the discharge bay as temperatures rapidly increased. The temperature. monitor _was installed in this area (see Figure 1). Evaluation of the data from the temperature monitor showed that the temperature variation on the bottom of the discharge bay was greater than the variation present in the water being discharged in particular, daily fluctuations up to 11*F (average hourly temperatures) were noted. -Of particular interest were the temperatures at the bottom of the discharge bay, which were considerably lower than the temperature of the water being discharged.

These discharge bay temperatures were compared to Monticello Reservoir water levels and a distinct correlation was noted. Since Monticello Reservoir is the upper reservoir for Fairfield Pumped Storage Facility, water levels may fluctuate several feet each day. It was found that lower lake levels were associated with higher temperatures on the bottom of the discharge bay and higher lake levels were

4 i Y associated with lower temperatures on the bottom of the discharge bay (see figure 2 and 3).

h During hot weather, with V C. Summer Nuclear Station operating at 100%, the L discharge canal becomes stratified. Hot water tends to occupy the upper portion of i

the canal and the bottom portion of the canal remains cool. Since the discharge bay is, at its deepest, about ten feet deeper than the canal, cool water from the lake can l

apparently enter through the canal and, because of the density gradient, flow into the deeper areas. It appears that as the lake level drops, the hot water layer drops also and causes the water at the bottom of the discharge bay to heat up. If the temperatures are high enough, the fish that are present are killed. When the lake level rises, cool water can again flow into the discharge bay area from the canal, allowing fish to recolonize the area. This process appears to continue until the temperatures in the discharge area remain so warm that the fish will not recolonize.

This suspected fish kill mechanism would help explain why the fish kilk in the discharge area tend to be limited to catfish, as these fish would be the most likely to be trapped near the bottom and would also be more likely to recolonize the area by following cool water inflows along the bottom of the discharge canal.

l The frequency and extent of the fish kills caused by the suspected mechanism discussed above appeu to be dependent on the temperature of the circulating )

water discharged from the V. C. Summer Nuclear Station, the water temperatures in l 1

Monticello Reservoir, and the magnitude of lake level fluctuation due to the l

operation of Fairfield Pumped Storage Facility.

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7ffEf l

Stephe r. E. Summer, Supervisor l Environmental Programs l

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Table 1 Observed Dead Fish June 1989 Fish Killinvestigation V. C. Summer Nuclear Station Date of NunTber of Fish identity Observation 32 white catfish and channel catfish,5 - 8 inches total 6/26/89 length

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6/27/89 18 white catfish and channel catfish,5 8 inches total length,1 channel catfish 13 inches total length,1 channel catfish 16 inches total length 6/28/89 74 1 white bass 13 inches totallength,67 white catfish 5 - 10 inches totallength,6 channel catfish 9 - 12 inches totallength 6/29/89 13 white catfish 5 - 8 inches total length 6/30/89 0 N/A 7/1/89 1 unknown

• 7/2/89 5 unknown

• 7/3/89 3 unknown

• 7/4/89 2 1 white bass 12 inches totallength,1 unknown 7/5/89 3 unknown

• 7/6/89 12 1 largemouth bass 15 inches total length,11 catfish 6 - 12 inches total length 7/7/89 0 N/A 7/8/89 0 N/A 7/9/89 0 N/A 7/10/89 4 unknown

• Total 167 l

• not inspected, seen from shore

.4 MONTICELLO RESERVOIR l

1 SERVICE WATER POND Discharge

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CIRCULATING WATER DISCHARGE l

l Figure 1 June 1989 Fish Kill V. C. Summer Nuclear Station l

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Preliminary Report, June 1989 Fish Kill A fish kill was discovered in the Circulating Water Discharge bay (see Figure 1) at V. C. Summer Nuclear Station in the morning of June 26,1989. A total of twenty-four fish were found and examined. The fish were all catfish,5 to 8 inches in total length. Most were white catfish, a few were identified as channel catfish. Most fish were badly decomposed and had apparently been dead for over 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Tempera-ture data and the lack of any indication of unusual discharges infer that the fish kill was probably the result of increased temperatures et the bottom of the discharge bay. It was suspected that the fish kill occurred lata on 6/24/89. There were no flu:;tuations in power level at V. C. Summer Nuclear Station during the suspected time of the kill. After notification of regulatory agencies eight more fish were noted the discharge bay (approximately 1630 hours0.0189 days <br />0.453 hours <br />0.0027 weeks <br />6.20215e-4 months <br />).

The discharge area has been repeatedly inspected and there is indication that this is a series of fish kills, probably occurring late at night. On 6/27/89 eighteen dead fish were discovered (all catfish) and on 6/28/89 seventy four dead fish were discovered. When it was realized that fish were continuing to be killed, regulatory agencies were notified. Sinc'. fish kills recurred after the initial notification, this is only a preliminary report. A complete report will be submitted after all pertinent data has been evaluated, taw-Stephen E. Summer, Suparvisor Environmental Programs 6/29/89

l

' MONTICEl.LO RESERVOIR Figure 1 June 1989 Fish Kill '

V. C. Summer Nuclear Station 7

SERVICE WATER POND k

1 CIRCULATING WATER DISCHARGE .

location of fish kill l

ATTACHMENT 2 Sample Fish Kill Report

.n. o.wie a c<. compaav g. ,sy.;a;.cn soy cu, I

sceaa u.uu, August 9, 1989 Mr. Val Nash South Carolina Department of Wildlife and Marine Resources 923 Hollis Lakes Road Rock Hill, South Carolina 29753

Subject:

Virgil C. Summer Nuclear Station Discharge Bay Fish Kill -

August 4, 1989

Dear Mr. Nash:

Please find attached a copy of a report submitted to the South Carolina Department of Health & Environmental Control in regards to the most recent fish kill which occurred in the discharge bay of the Virgil C. Summer Nuclear Station. This fish kill occurred on August 4, 1989 while at 100 percent power. Also, per discussion with yourself and DHEC on July 31, 1989, South Carolina Electric & Gas Company will submit an action plan by August 31, 1989.

Should you require any further information, please contact Mr. Charles McKinney of my staff at your convenience.

Very truly yours, O. S. Bradham EWR/OSB: led Attachment c: M. B. Williams W. R. Baehr l S. E. Sunrner W. R. Higgins W. F. Bacon W. M. Lide, Jr.

R. R. Mahan R. L. Prevatte NPCF RTS (ONO 890067)

File (818.05 & 809.06-1)

l FISII KILL REPOltT I

[ A ugust 4,1989]

h On the morning of August 4,1989, a fish kill was discovered in the circulating wate discharge bay of the V.C. Summer Nuclear Station (see Figure 1). A total of 89 deal were found floating in the bay, all of which were examined, measured, and identified to species. Table 1 shows numbers, species, and size ranges of fish observed on Au and for several days thereafter. All of the dead Ush found on August 4th were foundi discharge bay; none were found in the discharge canal or in the open water of Afon Reservoir. All of the dead fish were badly decomposed, suggesting that the kill occ some time on the previous day, the third of August. No freshly-killed or moribund fish were observed. None of the fish examined showed any Indication of trauma, diseas poisoning. Dissolved oxygen levels in the discharge bay ranged from 4.8 - 5.3 mg/l o morning of August 4, too high to have been the cause of the kill.

There were no fluctuations in power levels at the V.C. Summer Station in the d to, during, and after the kill. Summer Station operated at or near 100% power over the 8 189 through 8-4 89 time period. Condenser outlet temperatures (see Appendix I) from 106.0*F to 109.0*F over the 8189 to 8 4 89 period. Temperatures at the bottom the discharge bay showed more extreme daily Ductuations, however, and on Aug 1989 they incressed from 97'F at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> to 108*F at 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> Instantaneous temperatures as high as 110*F were seet. . ate in the evening (2000 2300 hours0.0266 days <br />0.639 hours <br />0.0038 weeks <br />8.7515e-4 months <br />)on 8-3 89 A previous fish kill report (supplied to SCDIEC on 7-20 89) discussed the effect of Fairfield Pumped Storage Facility operations on Monticello Reservoir lake levels and pointed out the relationship between low lake levels and high water temperature in the discharge bay. On 8-3 89, a 3.8 foot drop in the lake level (0800 - 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />) was associated with an 11*F increase in average temperatures at the bottom of the disch bay.

Given the history of thermally-related fish kills at Summer Station and the absence of any other likely causes, it appears that the August 4,1989, fish kill was caused by temperature fluctuations at the bottom of the discharge bay on the third ofAugust.

l OuM /%d__

Phillip Moore Environmental Specialist

4 MONTICELLO RESERVOIR I

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l SERVICE WATER POND Discharge (

Canal Ti i-l  !

l Discharge Bay 1 ~

1

J CIRCULATING WATER DISCHARGE i

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i i Figure 1.

i TABLE 1 FISH KILL INVESTIGATION August 4 7,1989 V. C. Summer Nuclear Station  !

I Date/ Time of Number Dbservation of Fish Species and Size Ranae 8-4 89(1000) 89 82 White Catfish (412" Total Length) l 3 Channel Catfish (6-12

• Total Length) i 1 Black Crappie (6' Total Len  !

3 Bluegill (3 8" Total Length)gth)  ;

8 4-89(1230) 6 unknown

• I i

8 4-89(1530) 7 unknown

• l 8-5 89(0800) 3 unknown' 8 5-89(1300) 5 unknown

• 8 6-89(1430) 1 Bluegill (~6" Total Length) 8 7 89(1200) 4 4 White Catfish (6 8" Total Length) 8-7 89(1530) 0 - - -

• Not examined; seen from shore.

I APPENDIX l Monticello Reservoir Condenser Discharge Bay Date Hours (EST) take Level Outlet Temp. Bottom Temp. .

81 0100 422.6 107.3 106 0200 423.0 106.9 104 j 0300 423.4 106.8 104 0400 423.8 106.3 103 l 0500 424.3 106.3 102 0600 424.7 106.2 100 1 0700 424.9 106.0 99 l 0800 425.0 106.1 99 0900 425.0 106.1 97 1000 425.0 106.5 97 1100 425.0 106.7 96 1200 425.0 106.6 97 1300 424.8 106.9 97 1400 424.4 107.8 97 1500 424.0 108.1 100 1600 423.8 108.0 100 1700 423.5 108.3 101 1800 423.5 108.7 101 1900 423.5 108.3 101 2000 423.5 108.2 102 2100 423.5 108.0 102 2200 423.6 108.1 103 2300 423.7 10s.2 102 2400 424.0 108.5 102 ,

i 4

l APPENDIX i 1

(continued)

Monticello Reservoir Condenser Discharge Bay Date Hours (EST) Lake level OWet Temp. Bottom Temp 82 0100 424.2 107.5 101 0200 424.4 107.5 99 0300 424.6 107.0 99 0400 424.8 106.8 99 0500 425.0 106.4 99 0600 425.0 106.2 99 0700 --

106.2 97 0800 425.0 106.2 99 {

0900 425.0 106.4 99 1000 425.0 106.9 99 1100 425.0 107.9 99 1200 425.0 107.6 99 1300 424.9 107.5 97 1400 424.7 107.8 99 1500 424.2 107.7 100 1600 423.8 No Data Avail. 100 1700 424.4 No Data Avail. 100 1800 423.0 No Data Avail. 101 1900 422.7 No Data Avail. 102 2000 422.5 No Data Avail. 103 2100 422.4 No Data Avail. 103 2200 422.4 No Data Avail. 104 2300 422.6 No Data Avail. 103 2400 422.9 No Data Avail, 103

i APPENDIX l (continued)

Monticello Reservoir Condenser Discharge Bav Date Hours (EST) Lake Level Outlet Temp. Bottom Temp.

83 0100 423.4 No Data Avail. 103 0200 423.7 No Data Avail. 103 0300 424.0 No Data Avail. 103 0400 424.4 No Data Avail. 102 0500 424.7 No Data Avail. 99

~~

0600 424.8 No Data Avai!. 100 0700 424,9 No Da'.a Avail. 99 0800 425.0 No Data Avail. 97 0900 ---

No Data Avail. 97 1000 --

Na Data Avail. 97 1100 424.9 l No Data Avail. 97 1200 424.7 No Data Avail. 97 '

1300 'I 424.4- No Data Avail. 97 9 00 424.0 No Data Avail. 97 1500 423.4 No Data Avail. 99 1600 422.8 No Data Avail. 100 1700 422.2 109.0 102 1800 421.6 108.8 103 1900 421.4 108.7 106 2000 421.2 108.7 107 2100 421.2 108.5 108 2200 421.2 108.5 108 2300 421.6 108.9 107 2400 422.2 107.6 104

I APPENDIX l (continued)

Monticello Reservoir Condenser Discharge Bay Date Hours (EST) Lake lev 7 Outlet Temp. Bottom Temp.

8-4 0100 422.6 107.2 106 0200 423.1 107.0 103 0300 423.6 106.8 103 0400 424.0 106.6 102 0500 424.4 106.5 101 0600 424.7 No Data 99 0700 424.9 No Data 99 0800 425.0 No Data 99 0900 ---

No Data 97 1000 --

No Data 97 1100 ---

No Data No Data 1200 425.0 No Data No Data 1300 424.7 No Data No Data 1400 424.2 No Data No Data 1500 423.7 No Data No Data 1600 423.0 No Data No Data 1700 422.4 No Data No Data 1800 422.0 No Data No Data 1900 421.7 No Data No Data 2000 421.5 No Data No Data 2100 421.5 No Data No Data 2200 421.5 No Data No Data 2300 421.7 No Data No Data 2400 422.0 No Data No Data I

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