ML20046D224

Followup to NPDES Noncompliance Notification:On 930721, Notified of Failure of Chronic Toxicity Test on Combined Samples Collected from Waste Water Collection Basin,Outfall 005 on 930713 & 19.Unwatering Process Initiated on 930717

ML20046D224
Person / Time
Site:	Mcguire, McGuire
Issue date:	08/04/1993
From:	Atherton N DUKE POWER CO.
To:	Gleason R NORTH CAROLINA, STATE OF
References
NUDOCS 9308160358
Download: ML20046D224 (4)

Text

a Duke Ibuer Company

' *' Genemtion Services Department 13339 Hagets ferry Road

-- Hunterwdie, hc28078-1929 OUKEPOWER August 4,1993 Mr. Rex Gleason Regional Manager Water Quality Section Department of Environment, Health and Natural Resources 919 North Main Street Mooresville, N.C. 28115

Subject:

McGuire Nuclear Station NPDES Permit NC0024392 Exceedances File: MC 702.13 z

Dear Mr. Gleason:

Pursuant to Part II, section D (6)(d) of the subject permit, this is a follow-up written report for recent noncompliances at the McGuire Nuclear Station. The initial notifications were made to Mr. Richard Bridgeman on July 21,1993, and to Mr. Mike .!

l Parker on July 22,1993, by Norma Atherton of Duke Power Company.

On July 21st, our Bioassay Laboratory notified us of a failure of a chronic toxicity test on combined samples collected from the Waste Water Collection Basin (WWCB),

Outfall 005, on July 13 and 19,1993. The failure was due to an observable inhibition of reproductivity in the Daphnia and not due to significant mortality.

McGuire Nuclear Station began unwatering a unit to the WWCB on the weekend of July 17th as a part of station activites. This unwatering process lasts for ti/o weeks. It is very unlikely that the source of this test fa' lure is still p:xsent in t'2e WWCB due to the very Mgh flow rates produced during this activity. As requirud by the permit, monthly anitoring will begin immediately until such time a single test is passed.

On July 22,1993, our Scientific Services laboratory notified us of an exceedance c,f the daily maximum fecal coliform limit of 400 colonies /100 ml on McGuire's sanitary system (WT), Outfall 003. The fecal caliform value observed was >2400 col /100 ml on the sample which had been collected on July 20, 1993.

Another sample was collected on July 22 for a repeat analysis. The results of the repeat analysis was (2 col /100 ml. It can not be determined what caused this exceedance since all operating parameters of the sanitary system, including chlorine, were within normal limits.

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There was no environmental impact to the receiving waters as a result of thiF, incident. If you should need additionalinformation or have questions, please contact Norma Atherton at (704) 875-5963.

Sincerely, h d.

Norma G. Atherton, Scientist-l Environmental Division, Water Protection Group 'l Generation Services Department  ;

i ec: Mr. Randy Kepler - NCDEHNR - Raleigh, N.C.  !

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xc:. U.S. Nuclear Regulatory Commission  ;

Office of Nuclear Reactor Regulation i Washington, D.C. 20555

_ Nuclear Regulatory Commission Document Control Desk i U.S. Nuclear Regulatory Commission .

Washington, D.C. 20555 Mr. Kim Van Doorn NRC Resident Inspector McGuire Nuclear Station 12700 Hagers Ferry Road Huntersville, N.C. 28078 U.S. Nuclear Regulatory Commission

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