ML20065C087

Lake Wylie Water Quality Interim Monitoring Study,Jul 1981- June 1982

ML20065C087
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Site:	Catawba
Issue date:	07/31/1982
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DUKE POWER COMPANY CATAWBA NUCLEAR STATION INTERIM MONITORING STUDY i

LAKE WYLIE WATER QUALITY MONITORING INTERIM 1981-1982 t.

ENVIRONMENTAL SERVICES SECTION STEAM FBDOUCTION DEPARTMENT DUKE POWER COMPAtN July 1982 i

9209230190 820913 PDR ADOCK 05000413 R

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s INTRODUCTION Lake Wylie, located in North and South Carolina, is the third largest of eleven reservoirs impounding the Catawba River by Duke Power Company. This j

reservoir extends north 45 km from the Wylie Dam up to the Mountain, Island

- cs Dam.

Atfullpondelevation(181.7mabo$e~MSI.)LakeWyliehas_asurface area of approximately 5000 ha, and contains a total volume of.piroximately 0 3

~

3.46 x 10 m withameanaepthofapproximatelf7 meters (Industri1 Bio-Test

^ L 2

Laboratorie's 1974; USEPA 1975).

Lake Wylie has a drainage basin of 7821 km. -;/

(Duke Power Company Data Manual 1980c) with 1632'km drained by the South Fork Catawba River (Industrial Bio-Test Laboratories ISN).

The.' lake receives 50%

1 of its water from the Catawba River via Mountain Island reservoir, 25% from

,/

the South Fork River, and 25% from local tributary input and runoff (Industrial Bio-Test Laboratories 1974).

Based on an average flow of 125 cms,through Wylie Dam, the average theoretical retention time of the reservoir is 32 days (Industrial -

,5' Bio-Test Laboratories 1974).

The reservoir serves the Wylie Hydroelectric Station (60 megawatts) which has an average generating discharge of 116 cms.

During operation, water is withdrawn from a depth of 6 to 18 m and discharged downstream. The lake also serves as a cooling water source for Plant Allen' Steam Station, a 1155 megawatt fossil fueled steam generating station.

Plant Allen, located on the northern portion of Lake Wylie between the Catawba River and the South Fork River, draws cooling water from the Catawba River at a maximum rate of 38 cms. This water is used for once through condenser cooling and discharged into the South Fork River.

In addition, Lake Wylie will supply makeup water at an average flow of 10 cms for the Catawba Nuclear Station (CNS).

The Catawba Nuclear Station 1

i I.p d

is located in York County, South Carolina.

The site is located near the center of a peninsula lying between Beaver Dam Creek on the north, Big Allison Creek on the south, and the main body of Lake Wylie on the east (Figure 1).

The cooling water will be withdrawn from the main body of the lake and will pass through a maximum of 10 cycles of concentration in mechanical draft cooling towers with the blowdown to be discharged at a rate of 0.15 cms into the Big Allison Creek arm of Lake Wylie.

In August 1974, Duke Power Company, Environmental Services Section began a sampling program on Lake Wylie.

This program constitutes the interim monitoring program for Catawba Nuclear Station.

The interim study conforms to the 1977 through 1979 interim program stated in the Catawba Nuclear Station Environmental Report (CNSER Section 6.1.1.1.2 - Table 6.1.14).

Data for the period 1974 through 1981 have been reported by Duke Power Company (1977a, 1978, 1979, 1980a, 1981).

The data contained in this report cover the period July 1981 through June 1982.

The objectives of the intenim study for Catawba Nuclear Station are to:

(1) document any long-term trends in the temporal variability of Lake Wylie water quality and, (2) compare long-term trends in the' water quality data immediately above and below the CNS site.

MATERIALS AND METHODS Sampling locations were monitored from July 1981 through June 1982 (Figure 1; Table 1).

The sampling regime it listed in Table 2.

A Hydrolab Model 6D water quality surveyor was used for all in-situ measurements.

Water sarnples were collected with a diaphragm pump.

The analytical methods for chemical and physical constituents measured on Lake Wylie are listed in lable 3.

Quality assurance practices adhered to USEPA (1979).

2

}

Data Analysis Daily precipitation totals at Charlotte Douglas International Airport, Charlotte, North Carolina were plotted for the period July 1981 through May 1982 (National Oceanic and Atmospheric Administration 1981-1982) (Figure 2).

Also, daily Lake Wylie forebay surface elevations were plotted to indicate lake levels for the period.

Mean daily discharge at Wylie Hydroelectric Station and at Mountain Island Hydroelectric Station were plotted to indicate daily discharges (Figure 2).

The water quality data were subjected to descriptive statistics (means, standard deviation, maximum and minimum values) as outlined in Barr et al. (1976).

Also, the data were subjected to Pearson's correlation' analysis (Helwig and Council 1979).

Only results with p >0.05 were considered statistically signifi-cant.

Standard deviation is denoted by "s".

For statistical calculations, all analytical determinations recorded as less than the detection limit were assumed to be equal to the detection limit as l'isted in Table 3.

Bicarbonate i

values were calculated from alkalinity 'v'alues using factors found in Hem (1970).

Y As previously reported, to summarize the large amount of data callected from July 1981 through June 1982 the following locations were grouped into specific regions:

Catawba River region (Locations 250.0 and 260.0), South Fork Catawba River region (Locations 240.0 and 249.0), Catawba Nuclear Intake region (Locations 220.0 and 225.0) and Catawba Nuclear Station Discharge region (Locations 210.0 and 215.0).

These groupings were based primarily on the geographic proximity of each location.

In discussing seasonal variability among quarterly data the following monthly divisions were made:

summer (August), fall (October),

winter (January) and spring (May).

Data for certain variables are presented 3

l l

graphically for the period January 1976 through July 1982.

Comparisons in this report generally are made with data obtained during the 1979, 1980, and 1981 reporting periods.

The physicochemical data collected on Lake Wylie during the 1981 through 1982' interim period are presented in Appendices 1 through 5.

SUMMARY

AND CONCLUSIONS In-situ profile data were collected monthly and water samples for laboratory analyses were collected quarterly during the period July 1981 through June 1982.

As noted in previous reports, local hydrology and meteorology exerted the primary influence upon the variability of the chemical and physical parameters.

The South Fork Catawba River continued to be strongly influenced by surface runoff, municipal and industrial discharges, and thermal discharges from Plant Allen Steam Station.

Due to the influence of discharge from Mountain Island Lake, the Catawba River continued to exhibit trbnds of a well mixed riverine system.

TheregionofLakIWylieimmed'iatelyaboveandbelowCatawbaNuclear Station displayed characteristics of a warm monomictic lake (Hutchinson 19'7).

i-5 As observed in previous study periods, water temperatures throughout Lake Wylie generally followed typical seasonal variations.

Temperature profiles in the South Fork region displayed stratification induced by heated discharge water from Plant Allen.

The maximum water temperature was measured in the South Fork Catawba River region which is irfluenced by thermal discharge from Plant Allen. Throughout the study period, temperatures in the Catawba River region indicated well mixed conditions.

Thermal stratification was apparent in the regions immediately above and below CNS during the spring and summer.

Isothermal conditions were generally observed in the regions immediately above and below CNS from October through March.

l 4

l

1 Dissolved oxygen (00) concentrations generally reflected the relationship between oxygen solubility and water temperature.

Lowest DO concentrations generally occurred from July through October. The maximum 00 concentrations were generally observed during January and February.

Due to below normal precipitation levels during the period ending June 1982, turbidity values were generally less than 15 NTU.

Lake Wylie is a soft water lake, exhibiting a hardness value of 18 mg-CACO3 Nutrient and mineral concentrations in Lake Wylie continued to exhibit trends similar to those observed during previous reporting periods.

The nutrient concentrations in the South Fork Catawba River region were generally higher than any of the other regions of the lake.

Total phosphorus concentrations were greatest in the South Fork Catawba River region.

Total phosphorus concen-trations in the downlake regions during January and May were higher than total phosphorus concentrations observed in the 1980-1981 reporting period.

Total phosphorus concentrations were generally lower in the Catawba River region during January and May than in the lower lake regions.

Total phosphorus concentrations in the South Fork River region were at or above the rest of the lake regions during January and May.

Analyses of cadmium, copper, and lead indicated that the trace metal concen-trations and spatial variability were similar to previous years (Duke Power Company 1977a, 1978, 1979, 1980a, 1981).

As observed in previous reporting periods, trace metal concentrations were higher in the South Fork Catawba River region.

The physiochemical constituents measured on Lake Wylie continued to exhibit trends 5

s.

similar to those observed during previous reporting periods.

No significant changes were observed from the previous year interim period.

RESULTS AND DISCUSSION Physical Variables (Temperature, Dissolved Oxygen, Turbidityl Lake Wylie temperatures ranged from 2.0 C during January (Location 249.0) to 35.0 C during July (Location 240.0).

Maximum temperatures were observed during the warmest months July (35.0 C) and August (34.0 C). The maximum temperature each month was measured in the South Fork Catawba River region, and.was attributed to thermal discharges from Plant Allen Steam Station (Figure 3).

Minimum temperatures were recorded in the lake region during December (5.0 C, Location 225.0) and January (2.0 C, Location 249.0).

Temperatures in the down lake regions continued to display patterns similar to past reporting periods (Figure 4).

Thermal stratification was apparent from May (1982) through August (1981).

As observed in past studies, the South Fork Catawba River region was stratified each month (Industrial Bio-Test Laboratories 1974; Duke Power Company 1977a, 1978, 1979, 1980a, 1981).

Due to thermal discharge from Plant Allen, a surface plume of heated water frequently extends upstream and downstream, i.

approximately 1.5 miles in both directions, from the point of discharge (Industrial Bio-Test 1974).

As indicated by the consistently small difference between maximum and minimum water temperatures in the water column, the Catawba River region is a well-mixed riverine system.

Surface to bottom temperature values at CNS intake and discharge exhibited little vertical difference from July 1981 through June 1982 (Figures 5-6).

The maximum difference in vertical temperature values was observed at CNS intake and discharge during July 1981 (AT = 6.9 C) and May 1982 (AT = 6.3 C) (Figures 5-6).

Due to the shallowness of the intake and discharge regions and the low retention time of Lake Wylie, stratification patterns were not well defined (Figures 5-6).

Previous studies 6

~

reported temperature trends similar to those observed during this period (Duke Power Company 1977a,1978,1979,1980a,1981).

Following seasonal patterns typical of other Piedmont Carolina reservoirs (Duke Power Company 1977; Industrial Bio-Test Laboratories 1974), dissolved

-1 oxygen (DO) concentrations in Lake Wylie ranged from 0.0 mg 1 during July and

-1 August to 14.4 mg E during May.

The overall highest concentrations generally occurred in January and the lowest D0 concentrations generally occurred from July through October (Figures 3 through 6).

The elevated DO concentrations in May,were associated with elevated pH indicative of photosynthetic activity.

Dissolved oxygen concentrations in the water column began to decline in April

-1 with the bottom waters being less than 5.0 mg 1 from July through September 1981 and May through June 1982.

Surface 00 concentrations were always above

~1 5.0 mg f These D0 trends were similar to those observed in previous reports (Duke Power Company 1977a, 1978, 1979, 1980a, 1981).

Turbidity, ranged from 4 tg 52 NTU (x = 16.0 NTU, s' = 13).

Highest turbidity

~

values were generally recorded in the Catawba River region and the South Fork Catawba River region during August (Figure 7) and were similar to spatial trends observed in previous reports (Duke Power Company 1980a, 1981).

Winter turbidity values were higher (9.6% increase) in the downlake locations immediately above and below the Catawba Nuclear Station than those values reported in.the 1981 reporting period (Duke Power Company 1981) (Figure 7).

Alkalinity and pH Alkalinity values exemplified a sof t water lake (Wetzel 1975). Monthly values ranged from 10 to 40 mg-CACO 2

( = 15 mg-CaC0 1

, s = 5).

Lake Wylie was 3

3 slightly acidic with 70% of the pH values less than 7.0 pH units.

During this interim period, pH values ranged from 6.0 (CNS discharge region; July 1981) 7

g e.

(Location 200.0; October) to 9.5 (Location 215.0; May 1982) (i = 6.8, s = 0.6).

The higher summer pH values observed in the surface waters were attributed to photocynthetic activity.

The seasonal pH trends were similar to those previously reported.

Specific Conductar.ce and Hardness Specific conductance values ranged from 54 to 410 pmho cm~1 (i = 104 pmho cm-1,

s = 36) throughout the study area.

As observed in past years, specific conduct-ance values were higher in the South Fork Catawba River region than in either the Catawba River region or the downlake regions in the vicinity of CNS. Generally conductance values observed during this monitoring period were slightly higher than those observed in the 1980-1981 reportingperiod(rangeof42to296pmhocmh

~

during 1980 through 1981).

The conductivities of the lake regions immediately above and below CNS were similar.

Lake Wylie waters, exhibiting a hardness value of 18 mg-CACO 2

, exemplified a soft water lake (Wetzel 1975).

3 t

Mineral Composition i

No substantial monthly or yearly variability was observed in mineral con-centrations (Figure 8).

Sodium and bicarbonate were the major ions in Lake Wylie.

Calcium, chloride, magnesium, silica, and potassium were also important constituents in Lake Wylie (Figure 8).

Minor mineral constituents included aluminum, iron, and manganese (Figure 8).

Aquatic Nutrients (Nitrogen and Phosphorus)

The mean nitrate plus nitrite concentration was 0.20 mg-N t-1 (s = 0.20), with concentrations ranging from less than 0.010 mg-N 11 (August 1981) to 0.89 mg-N t-1 (October 1981). The trends observed during the 1980-1981 reporting period continued through the 1981-1982 period (Figure 9).

Maximum concentrations of nitrate plus nitrite generally occurred in winter.

The lower nitrate plus nitrite 8

e concentrations occurred during periods of low DO concentrations in Lake Wylie bottom waters.

Upstream loading along the South Fork River (Industrial Bio-Test Laboratories 1974) resulted in higher nitrate plus nitrite concentrations in the South Fork Catawba River region than any of the other three regions (Figure 9).

The lake regions immediately above a.nd below CNS continued to l

display previously observed seasonal patterns.

The,mean ammonia concentration for the study was 0.11 mg-N t~1 (s = 0.08), with 4

concentrations ranging from less than 0.005 mg-N t-1 (August 1981) to 0.57 mg-ff f"1 (May 1982).

During the 1981-1982 reporting period ammonia concentrations were generally more consistent in the down lake regions than in the river regions (Figure 10).

The temporal trends of total phosphorus and orthophosphate were sin.ilar.

Orthophosphate concentrations ranged from less than 0.005 mg-P t'l to 0.44 mg-P 1~1 (i = 0.035 mg-P f-1, s = 0.06). Orthophosphate concentrations were higher in the deeper water regions immediately above and below CNS during the i

winter and may have been due to surface runoff.

Orthophosphate concentrations in the South Fork Catawba River region were considerably higher than the concentrations in the Catawba River region.

Previous studies reported ortho-phosphate trends similar to those observed during this period (Duke Power l

Company 1977a, 1978, 1979, 1980a, 1981).

i l

j During the study period, total phosphorus concentrations ranged from 0.016 to 0.65 mg-P 1-1 (i = 0.067 mg-P f~1, s = 0.07).

Total phosphorus ccncentrations l

generally decreased with distance, during August and October, downstream from the South Fork Catawb River region.

Higher total phosphorus concentrations were observed in the downlake regions during January and May than observed in the 1890-1981 reporting period (Figure 11).

9

e blavyMetals(cadmium, copper, lead,andzinc)

Analyses of cadmium, copper, lead, and zini indicated concentrations and spatial variability similar to previous years (Duke Power Company 1977a,1978,

~1 1979, 1980a, 1981).

Cadmium levels ranged from less than 0.1 to 4.5 pg t Generally, lowest values were observed during January (80% less than 0.1 pg t-1) and August (90% less than 0.1 pg t~1).

Copper concentrations ranged from

-1 less than 1.0 to 280 pg 1 The higher copper concentrations were observed at

-1 Location 249.0 on two occasions (October 1981, 280.0 pg 2 and January 1982, 260 pg t-1) indicating input to the South Fork River from an apparent upstream point source.

Ninety two percent of lead concentrations were less than 1.0

-1

~1 pg 1 Zinc concentrations ranged from 5.0 to 300 pg 2 The higher zinc concentrations was generally observed in the South Fork Catawba River regions.

O

's 10

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LITERATURE CITED American Public Health Association (APHA), American Water Works Association (AWA), and Water Pollution Control Federation (WPCF).. 1976.

Standard methods for the examination of water and wastewater.

14th ed.

American Public Health Assn. NY.

1193 p.

Barr, A. J., J. H. Goodnight, J. P. Sall, and J. T. Helwig.

1976.

A user's guide to SAS 79.

Sparks Press.

Raleigh, NC.

494 p.

Currie, L. A.

1968.

Limits for qualitative detection and quantitative detection.

Analytical Chemistry Vol. 40, March 1968.

Duke Power Company.

1977a.

Catawba Nuclear Station Interim Monitoring Study.

July 1974-1977.

Duke Power Company.

Charlotte, NC.

1977b.

Chcmical characteristics of piedmont lakes. Workshop in Aquatic' Ecology in the Southeast.

October 14, 1977.

Duke Power Company.

Charlotte, NC.

np. (not published).

1978.

Catawba Nuclear Station Interim Monitoring Study.

July 1977-June 1978.

Duke Power Company, Charlotte, NC.

1979.

Catawba Nuclear Station Interim Monitoring Study.

July 1978-June 1979.

Duke Power Company.

Charlotte, NC.

1980a.

Catawba Nuclear Station Interim Monitoring Study.

July 1979-June 1980.

Duke Power Company.

Charlotte, NC.

1980b.

A guidebook to aquatic chemistry studies, 1959-1977.

Charlotte, NC.

1980c.

Data manual.

1980.

Duke Power Company.

Charlotte, NC.

i.

1981.

Catawba Nuclear Station Interim Monitoring Study.

July 1980-June 1981.

Duke Power Company.

Charlotte, NC.

Helwig, J. T. and K. A. Council (ed.) 1979.

SAS user's guide 1979 edition.

SAS Institute Incorporated, Raleigh, NC.

494 p.

Hem, J. D.

1970.

Study and interpretation of the chemical characteristics of natural water.

Geological Survey Water-Supply Paper 1473.

U.S.

Government Printing Office, Washington, DC.

363 p.

Hutchinson, G. E.

1957.

A treatise on limnology.

Vol. I.

John Wiley and Sons, New York, NY.

1015 p.,

Hydrolab Corporation.

1973.

Instructions for operating the Hydrolab Surveyor Model 60 in-situ water quality analyzer. Austin, TX.

146 p.

Industrial Bio-Test Laboratories.

1974.

A baseline / predictive environ-mental investigation of Lake Wylie.

September 1973-August 1974.

Report to Duke Power Company:

Industrial Bio-Test Laboratories.

Northbrook, II.

743 p.

11

1 National Oceanic and Atmospheric Administration.

1981-1982.

Local climalogical data 1979, Charlotte, NC.

National Climatic Center, Asheville, NC.

Technicon Industrial Systems.

1972.

Operation manual for the Technicon Autoanalyzer 11 System.

Technical Publication No. TAl-0170-20.

Tarrytown, NY.

United States Environmental ' Protection Agency.

1975.

National Eutrophication Survey.

Corvallis, OR.

Working Paper No. 441.

1979.

Handbook for analytical quality control in water and wastewater laboratories.

Technology Transfer, Cincinnati, OH.

We[ss,C.M.,P.H.' Campbell,T.P. Anderson, ands.L.Pfaender.

1975.

The lower Catawba lakes:

Characterization of phyto-and zooplankton communities and their relationships to environmental factors.

Department of Environmental Sciences and Engineering, School of-Public Health,

' University of North Carolina, Chapel Hill, NC.

ESE Publication No. 389.

396 p.

Wetzel, R. G.

1975.

Limnology.

W. B. Saunders, Philadelphia, PA.

743 p.

I l

4 12

~

Table 1.

Lake Wylie water quality monitoring locations and depths (Duke Power Company 1980b).

Location Depth Sampling Location,

(m)

Description i

260.0 6-8 Catawba River at Rt. 29-74 bridge, mid-channel 4

250.0 5

Catawba River, 25 m from Allen Steam Station intake screen 249.0 3-4 South Fork Catawba River at Upper Armstrong Bridge, mid-channel

, 240.0 11-12 South Fork Catawba River at Lower Armstrong Bridge, mid-channel 225.0 14-15 Lake Wylie at Route 49 Bridge, mid-channel i

220.0 15 Lake Wylie near mouth of embayment near proposed intake to CNS, mid-channel 210.0 16-17 Lake Wylie near mouth of Big Allison Creek and Catawba River, due east of Goat Island, mid-channel 215.0 9-10 Big Allisom Creek, near bridge over proposed discharge for CNS, mid-channel i-

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Table 2.

(Me Ilylic Interim flonitoring Program Location 210.0 215.0 220.0 225.0' 240.0 249.0 250.0 260.0 In.stu Analyses Temperature In-situ parameters are acquired monthly using the in-situ llater Quality An)1yzer Dissolved oxygen at all locatons at I m intervals from the surface (0.3 m) to I m above the oottu.i.

I,il Specific conductance iahofatory_Anglys_es Alkalinity Q/1,B/2 Q/T,B/2 Q/T,B/2 Q/I,II/1 Q/I,B/l Q/T/l Q/T,B/1 Q/T/l Turbidity Q/I,B/2 Q/ T,B/ 2" Q/T,B/2 Q/I,B/l Q/T,B/l Q/T/l Q/I,B/l Q/T/l Anmoniat Q/T,B/2 Q/T,B/2 Q/ T,0.'2 Q/T,B/l Q/I,B/l Q/T/l Q/I.B/l 0/1/1 fli tra te-Ili tri te Q/T,B/2 Q/I,B/2 Q/T,B/2 Q/T,B/l Q/T,B/l Q/T/l Q/I,B/l Q/f/1 Orthophosphate Q/I,B/2 Q/T,B/2 Q/1,B/2 Q/T,B/1 Q/I,B/l Q/T/l Q/T,B/l Q/T/l Total phosphorus Q/T,B/2 Q/T,B/2 Q/T,B/2 Q/T,B/l Q/I,B/l Q/T/l Q/T,B/l Q/1/1 Chloride Q/T,B/2 Q/T,B/2 0/T,B/2 Q/T,B/l Q/T,B/1 Q/T/1 Q/T,B/1 Q/T/l Silita Q/T,B/2 Q/T,B/2 Q/T,B/2 Q/T,B/l Q/T,B/1 Q/T/l Q/T,B/1 Q/ T/ l fron Q/ T,B/1, Q/T,B/l Q/T,B/l Q/T,B/l Q/T,B/l Q/1/1 11anganese Q/T,B/l Q/T,B/l Q/T,B/1 Q/I,B/l Q/T,B/l Q/T/l Magnesium Q/T,B/1 Q/T,B/l Q/T,B/l Q/T,B/l Q/I,B.'1 Q/T/1 Calcium Q/T,B/l Q/T,B/l 9/T,B/l Q/T,B/1 Q/T,B/ l Q/T/l Sodiumi Q/T,B/l Q/1,B/1 Q/T,B/l Q/T,B/l Q/T,B/l 0/T/l Potassium Q/1,B/l Q/T,B/l Q/T,B/l Q/T,B/l Q/T,B/l Q/T/l Aluminum Q/T,B/l Q/T,B/l Q/I,B/l Q/T,B/l Q/T,B/l Q/T/1 Cadmium Q/T,B/l Q/T,B/1 Q/T.B/l Q/I,B/l Q/T B/l 0/T/l Copper Q/T,B/l Q/T,B/1 Q/T,B/1 Q/T,B/l Q/T,B/l 0/T/1

1. cad Q/T,B/l Q/T,B/l Q/T,B/l Q/T,B/l Q/T,B/1 Q/T/l Zinc Q/T,B/l Q/T,B/l Q/T,B/1 Q/ T,8/1 Q/T,B/l Q/T/l J

f Codes i

1 Frequency of Sampling / Depth Interyals / ilumber of Replicates Frequency of Sampling:

Depth Intervals; llinnber of Replicates:

H - 11onthly T - Surface (0.3 m) 1 (only a surface and a bottom sample)

Q - Quarterly (Jan-Feb, April-May, B - Bottom (1 m above bottom)

Aug, Oct-flov) 2 (two surface and two bottom samples)

Table 3.

linalytical methods for chemical and physical constituents measured on Lake Wylie.

Variables Method Preservation Detection lim limit of Determination' Albalinity, total Electrometric titration to a 4'C 1 mg-CACO.1-3 pH of 5.11

~

Aluminum Atomic absorption /DAS 0.51 11:40 0.2 mg l'I 0.6 a g 1 3

I

/mnia Automated pl.enatel 4*C 0.006 eg.II.1 0.009 s.g-fl.1 Cadmiu.n Atomic absorption /HGAl b.51 Hft0 0.11 e.g.1 0.17 a.g l 3

Calcium Atcmic absorption /0Al 0.51 Ht 0 0.06 og.1-3 0.08 mg l 3

Chloride Automated ferricyanidel 4'C 0.2 sq. l'I 0.3 mg.1 l

Condactante, specific Ten.peratus e con.pensateJ nickel in-situ 1 omtio/cm #

j electrofel Copper -

Atomic absorption /HGAl 0.51 Hf40 0.7 99 [

1.0 99 [

3 0,3

g. caco [

Hardness (Ca, Mg)

Calculation 2 Iron, total Atomic absorption /DAl 0.51Ht40 0.1mg.d 0.2 mg [ 3 3

Lead Atomic absorption /HGAl 0.51 IINO 2 pg l'I 3.2 pg.l'I 3

Hignesium Atomic absorption /DAl 0.51 IINO 0.007mg.[

0.01 mg.1 3

Hangar.ese Atomic absorption /DAS 0.51 HNO 0.02 mg l'I 0.06 mg 1 3

l filtrate + tiitrite Automated cadmium redactiont 4*C -

0.005 mg-N.1 0.008 mg-fl.1 Orthophost.hste Automated as'corbic acid 4'C 0.005 mg-P.l'I 0.008 mg-P l reduction!

=

Onygen, dissolved Temperature cosopensated In-situ 0.1 mg I-I*

polarographic cell!

rH Temperature c<npensated glass In-situ 0.l*

elec te odel 1

Phosphorus, total Persulfate digestion followed by automated ascorbic acid 4'C 0.004 mg-P l~;

0.006 mg-P l'I reductioni 0.03ptl'I 0.,006 mg-P.1-I i

Potassium Atomic absorption /0Al 0.5% lino3

)

Silica Automated molydosilicatel 4*C 0.2 mg-51 1-I 0.3 mj-SI I d i

Sodlum Atomic absorption /DAl 0.5% HtIO 0.03 mg.l'I 0.06 eg l'I 3

Temperature Thermistor ther;nuinetert in-situ 0.l*C*

Turbidity Nephelometric turbidityl 4'C-1 NIU*

Zinc Atomic absorption /DAl 0.5f ilH0 4 pg l'I 7 s.g.]

3 t = Ibe detection limit is defined as: DL = ! + 2(s), where ! = mea. and s = standard devlation of a selected number of blanks. Itie limit of determination is defined as: 10=Ie5s

• = Detection licit ar.d limit of determination w(er)e.3 not determined on these variables; instead instrument sensitivity is given.

NO = Not determined.

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Sampling locations for Catawba Nuclear Station Interim Monitoring.

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Variations of nitrate + nitrite concentrations for Lake Wylie, 1976-1932.

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Variations of ammonia concentrations for Lake Wylie, 1976-1982.

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Variations of total phosphorus concentrations for Lake Wylie, 1976-198?.

APPENDIX TABLE OF CONTENTS 1.

Water quality data:

temperatures, dissolved oxygen, dissolved oxygen %

saturation, specific conductance, pH, turbidity and alkalinity.

2.

Water quality data: nitrate plus nitrite, ammonia, orthophosphate, total phosphorus, and silica.

3.

Water quality data:

iron, manganese, calcium, magnesium, hardness,

, sodium, potassium, and aluminum.

4.

Water quality data: chloride.

5.. Water quality data: cadmium, copper, lead, and zinc.

e Y

4 i

i

D D

i i

APPENDIX 1 Water Quality Data Variables:

Tetroerature DissobedOdygen Lissolved Oxygen

• Saturation Specific Conductance pH Turbidity Alkalinity t

\\

'J DUKE POWER COMPAtly PRilli DATE WATER QUALITY DATA 32/07/IG TYPE A

___________________________________---_g________g______________g________g________g_______g________g________g_________g_______

O O

DO O SPEC O

O O

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D TEt1P D DO SAT D COND D

D ORP O TURB D ALK D LIGHT D CEPTH LnC %1 s r'f1 f t90AY R llRS f1ETERS REP E C E NG/L I

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D ORP D TURB D ALK D LIGHT D DEPTH LOCATIOtt f10DAYR llRS ME1ERS REP E C E MG/L E Ut1HOS E PH E NV E tiiU E MO/L E LY/ fit ti E ME TERS 2 B 5 7 0 - ~ ~ ~ 9 7 T 7 7 a T -- T a 2 5 -- ~ ~ 5 5 - ~ ~ -- ~ ~ ~ 2 5 3 ----- 5 7 5 - -- 8 2 - ---- T 6 2 -- -- - 8 7 7 - ---' ~ ---- - ~ - --- - -- - ---- -- - --- -- - - - - -- -- -- -- -

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-- ~5. U 13 7 9u Bu iTu a

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APPENDIX 2 Water Quality Data Variables:

flitrate plus Nitrite Amonia Orthophosphate Total Phosphorus Silica Y

z-.

i e

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APPENDIX 3 Water Quality Data Variables:

Iron Manganese Calcium Magnesium Hardness Sodium Potassium Aluminum i

's'

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APPENDIX 4 Water Quality Data Variables:

Chloride O

9 e

e

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l l

l

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~

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y

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APPENDIX 5 Water Quality Data-Variables:

Cadmium Copper Lead Zinc

's-

l.

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