ML20149J273
| ML20149J273 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 02/16/1988 |
| From: | Nauman D SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Thomas S NORTH CAROLINA, STATE OF |
| References | |
| NUDOCS 8802220337 | |
| Download: ML20149J273 (2) | |
Text
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gurreg292Q Nuclear Oper:.t>ons SCE&G February 16, 1988 Mr. Stephen C. Thomas NPDES Permits Section South Carolina Department of Health and Environmental Control Division of Water Quality Assessment and Enforcement 2600 Bull Street Columbia, South Carolina 29201
SUBJECT:
Virgil C. Summer Nuclear Station NPDES Permit No. SC0030856 Discharge Noncompliance
Dear Mr. Thomas:
This letter is being submitted as a written follow-up to the telephone notification of February 8,1988, that pH at the Plant Surge Basin, Outfall 6B, had exceeded the permitted maximum of 9.0.
Samples taken on February 8, 1988, showed pH values of 9.25, 9.33, and 9.49 at 0750, 0800 and 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br />, respectively.
An investigation was conducted with the following items noted:
A)
Flow through Outfall 68 was at a minimum due to reduced system leakage which contributed to increased stagnation of the Plant Surge Basin.
8)
The pH increased through the day and decreased overnight.
Results of the investigation are inconclusive at this time but seem consistent with pH problems due to the contributing effects of algae.
The pH may be brought under control with maximum flow through the outfall but this is not conducive to normal operations and maintenance, i.e.,
increased wear on system components, pumps, etc.
South Carolina Electric & Gas Company (SCE&G) has been working with the Industrial and Agricultural Wastewater Division at SC Department of Health and Environmental Control (DHEC) to gain approval for the use of algicides as re::mmended by the SC Wildlife and Marine Resources Commission.
Pending the approval to use algicides at this (and other) outfalls, similar pH oroblems may continue intermittently.
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Mr. Stephen C. Thomas February 16, 1988 Page 2 The pH of Outfall 68 was measured et 8.7 on February 16, again indicating the intermittent nature of this problem.
Should you have any further questions, please contact W. Frank Bacon of my staff at (803) 340-4156.
ry u y yours,
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- 0. S. Bradham H. B. Williams M. N. Browne A. R. Koon, Jr.
W. F. Bacon -
NRC Document Control' Desk (Docket No. 50-395)
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NPCF' File 814.07 i
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