ML20207M987

NPDES Noncompliance Notification:During 861216-870104. Difficulty Experienced W/Maintaining 004 Discharge in Compliance w/7.0 Ph Value.Caused by Increased Vol of Water Discharged to Settling Pond.Water Vol Restricted

ML20207M987
Person / Time
Site:	Cooper
Issue date:	01/06/1987
From:	La'Toya Cooper NEBRASKA PUBLIC POWER DISTRICT
To:	Harris J NEBRASKA, STATE OF
References
NUDOCS 8701130369
Download: ML20207M987 (4)

Text

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"-]K GENERAL OmCE Nebraska Public Power District " " "L'tson"e"?d'""M^ """

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January 6, 1987 Mr. Joe Harris Section Head, Permits and Compliance Water Quality Division Nebraska Department of Environmental Control P.O. Box 94877 Lincoln, Nebraska 68509-4877

Subject:

Nebraska Public Power District (NPPD)

Cooper Nuclear Station (CNS)

NPDES Permit No. NE 0001244 Noncompliance Report You were notified by telephone on January 5, 1986 of a discharge noncompliance of water above the daily maximum pH limitation at Cooper Nuclear Station's (CNS's) 004 discharge on January 3, 1986. The 004 discharge was back in compliance on January 4, 1986 with a 7.0 pH value. Enclosed is a noncompliance report submitted in accordance with requirements of the station's NPDES permit.

The noncompliance was due to the failure to terminate operation of a temporary acid pump at the inlet to the water treatment settling pond during an extended time period of low discharge of water to the pond. The acid pump was in use to control the pH of the water in the pond. The low discharge of water to the pond was the result of increased operation of the demineralizer train.

During the time period from December 16 - January 4 the station has experienced difficulty in maintaining the 004 discharge in compliance. Reasons for the noncompliances were attributable to (1) increased volume of water discharged to the water treatment settling pond due to putting CNS into service; (2) failure of the water from the water treatment area to mix with the water in the pond as a result of temperature stratification in the pond; and (3) failure to adjust the pH of the water from the water treatment area and the temporary acid feed pump at the water treatment pond inlet at the appropriate time due to the lag tisce within the pond and the variable flows. During this time period the station has attempted to control the pH of the water at the 004 discharge by adjusting the pH of the water from the water treatment area, adding acid at the water treatment pond, j SQ ~ 590 a s 870113036987010fg8 ADOCK 05000

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Mr. Jo2 Hntric Janucry 6, 1987 Page 2 restricting the volume of water discharged from the pond, and placing a temporary circulating pump in the pond. These approaches to date have had only short term success because of the reasons presented above.

If you have any questions regarding this response, please contact me.

Sin - ely b?'

sr}JohnCooper L.

Environmental Manager LJC/eyc:cl cc: R. D. Martin w/ Enclosure iD. B.:Vassallo <w/ Enclosure G. R. Horn w/ Enclosure R. L. Beilke w/ Enclosure File CB175 w/ Enclosure M

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, '7 Nebraska Public Power District NON C0WLIANCE REPORT

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NE Quarter, NW Quarter, Section 32 , ,_

Township SN, Range 16E, Nemaha County TIIS REPORT MUST BE FILED WilEN VIE LADORNIURY j ,

TEST RESULTS FROM ANY EFFLUENT SAMPLE EXCEEDS g

.. Tl!E LIMITS IN YOUR NPDES DISctlARGE PERMIT. o 004 Date .'.

NE 0001244 renMir inniers Sample 817 0t1 013

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1. The report must be mailed to:

Nebraska Department of Environmental Control Permits and Enforcement Section P.O. Box 94877 State House Station 301 Centennial Mall South Lincoln, Nebraska 68509 .

l within 5' days after date of Non Compliance.

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2. Complete the heading, including pemittee name, NPDES Pemit Number, and the date the sample was taken.

3. List each parameter (BOD, TSS, pH, etc.) as listed in your NPDES Pemit, showing the limits in the pemit. Flow data for day of

,2  : _ sampling is required. - -

4. Enter the results of the analysis on the right side of the

. report.

5. Complete sample type and the frequency of analysis used.

6. Use blank section on report to give written coments as to the reason for Non Compliance.

7. Have authorized agent sign report at bottom prior to mailing. .

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