ML20083P989

Forwards Groundwater Monitoring Data for CNS Conventional Wastewater Treatment Ponds.Samples Collected on 950313,in Accordance W/Protocol Outlined in Sampling Analysis Plan

ML20083P989
Person / Time
Site:	Catawba
Issue date:	05/16/1995
From:	Carter J DUKE POWER CO.
To:	Aponte H SOUTH CAROLINA, STATE OF
References
NUDOCS 9505250059
Download: ML20083P989 (6)

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.ll l Duke (butt Company .

EhrtricSystem Support ikptrtment

' IDDilagers RrryIMI flumteru.ille, NCZWS?93 .

DUKEPOWER May 16,1995 Mr. Harry Aponte SC Department of Health and Environmental Control Bureau of Water. Pollution Control Water Quality Assessment and Enforcement Section 2600 Bull Street Columbia, South Carolina 29201

Subject:

Duke Power Company - Catawba Nuclear Station WC Pond Ground Water Monitoring Data NPDES Permit # SC0004278 File Code: CN-705.05 Certified Mail: Z-403319204

Dear Mr. Aponte:

Please find attached groundwater monitoring data for Catawba Nuclear Station's Conventional Wastewater Treatment Ponds. Samples were collected on March 13,1995 in accordance with protocol outlined in the Sampling and Analysis Plan (SAP). Custody Sheet, Ground Water Monitoring Report and Ground Water Contours are included as part of this report.

In general, groundwater geochemistry was similar to that presented in previous reports. The pH value for WCMW3 (5.7) was lower than the SDWA secondary limit of 6.5. Low pli values are typical of ground water in the Duke Power service area. Sulfates concentrations at WCMW1 continue to show an increasing trend, however sulfate concentrations at WCMW2 decreased from the September,1994 sampling event. Total iron and total manganese concentrations at WCMW1 through WCMW3 were above the Secondary Maximum Contaminant Level for drinking

" Mat & (SC R.61-58.5(O)). The concentration of selenium at WCMW1

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increased from < 1.0 ug/l in September '94 to 16.6 ug/l in April '95.

Total copper concentrations at WCMW4 continue to be higher than thoso at WCMW1 through WCMW3 (Table 1).

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" . h The increasing trend in sulfate concentration at the background well, WCMW1, is being evaluated.

Should you have any questions or comments regarding this report please feel free to contact John Mease at (704) 875-5347.

Sincerely,

/

ohn Carter, Tochnical System Manager .

ESS/ Water Protection  !

jrm Attachments ,

xc: Catawba District Hydrologist CNS NRC Distribution List l

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• bc: Estridge, J. T. MG03A5 Harris, J.' T. :' - CN01EM.

. Jackson, A. P. CNO3CH Santini, R. 'A. MG03A Vander Velde, G. A. MG03A5 w/o: Lascara, M. A. MG03A5 1

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. 1 DUKE POWER COMPANY April 18,1995 Table 1 GROUND-WATER MONITORING REPORT Facility: Catawha Nuclear Station Conventional Chemical Waste Treatment Ponds Sample Date: March 13,1995 (GEOCIIEMISTRY DATA)

Storet Monitoring Well Identification FIELD SC R61-58 Parameter Units Number WCMW1 WCMW2 WCMW3 WCMW4 BLANK MCL 4 1.ab Certificate No. 00008 99005 99005 99005 99005 99005 ^ , ,

Top of Well Casing mst-feet 622.06 608.32 600.35 595.42 - '

Depth to Water feet 16.34 19.49 17.83 12.58 m 't Water Elevation (0.01') msl.fect 82545 605.72 588.83 582.52 582.84 / s d'l Well Depth feet 1 25.% 30.02 30.06 21.52 e C6 Field Spec. Conductance umho/cm 00095 1954 499 113 120 >

j Field pil Std. Units ON00 6.7 6.8 5.7 6.5 6.5-8.5*

Lab pli Std. Units 00403 s 6.5-8.5

• Arsenic mgA 01002 0.0016 4.001 <0.001 <0.001 <0.001 0.05 Alkalinity mgA 52 112 17 40 0.5 Harium mgA 01007 0.068 0.053 0.065 0.027 <0.005 2 Cadmium mFA 01027 <0.0001 0.00039 <0.0001 <0.0001 <0.0001 0.005 Calcium mgA 00916 200 0 27.4 2.2 7.0 0.039 >

Chloride mgA 00940 38 18 23 6 <l .0 250*

Chromium mgA 01034 0.0039 0.0056 0.0053 0.0061 0.0022 0.1 Copper mgA 01N2 0.0064 0 0036 0.0032 0.022 0.0017 1.0*

Iron mgA 01045 1.99 6.95 6.69 2.0% <0.010 0.3

• Irad mg/l 01051 <0.002 0.0021 0.0059 <0 002 <0.002 0.05 Magnesium mgA 00927 86.8 14.8 3.3 3.4 <0.03 -

Manganese mg/l 01055 0.059 0.304 0.255 0.019 <0 005 0.05*

Meremy mg/l 71900 <0 0001 <D.0001 <0.0001 <0.0001 <0.0001 0.002 NO3 + NO2 mg/l 00630 0.81 0.78 <0.05 0.17 <0.05 to Potassium mgA 00937 4.82 2.70 2.26 1.72 <0.12 Scienium mgA 01147 0.017 <0.001 <0.001 <0.001 <0.001 0.05 Silver mg/l 01077 0.0019 0.0002 0.0002 0.015 0 0002 0.05*

Sodium mg/l 00929 78.4 42 1 14.8 11.1 <l .5 -

Sulfate mg/l 00945 1177 114 19 12 2.24 250*

Zinc mg/l 01092 0 009 0.009 0.01 0.005 <0 005 5*

• SC R61-58.5(O) Secondary Maximum Contaminant level (MCL) for drinking water as reference only.

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