RBG-29028, NPDES Noncompliance Notification:On 880907 & 22,high Values for Outfall 004 Noted.Both Excursions Caused by Lack of Familiarity W/New Type of Hypochlorite Tablets.Investigation Initiated to Determine If Changes in Design Warranted

NPDES Noncompliance Notification:On 880907 & 22,high Values for Outfall 004 Noted.Both Excursions Caused by Lack of Familiarity W/New Type of Hypochlorite Tablets.Investigation Initiated to Determine If Changes in Design Warranted

ML20155J265
Person / Time
Site:	River Bend
Issue date:	10/14/1988
From:	Booker J GULF STATES UTILITIES CO.
To:	Oneill M LOUISIANA, STATE OF
References
RBG-29028, NUDOCS 8810250450
Download: ML20155J265 (2)

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GULF STATES UTILITIES COMPANY

. u. u swe . ,1 .m m e ms .. u sm m p=4 e } *, *. i , 44 4 45 .t October 14, 1988 RBG-29028 File Nos. G1.11.2 Gl.11.7 Ms. Maureen O'Neill, Assistant Secretary Office of Water Resources Department of Environmental Quality Post Office Box 44091, Capitol Station Baton Rouge, LA 70804-4091

Dear Ms. O'Neill:

Water Discharge Permit No. WPO409 NPDES Permit No. LA0042731 River Bend Station - Unit 1 This is to inform you of noncompliances with Water Discharge Permit No. WPO409&for Outfall 004, treated sanitary waste from power station to Grantf(Bayou. Whereas the discharge limitations for total residual chlorine (TRC) for this outfall are a minimum of 0.8 mg/l and 'a maximum of 2.0 mg/1, the following concentrations were recorded on September 7 and September 22, 1988:

9/7/88 - 3.2, 3.7, 0.5, 0.3, and 0.5 mg/l 9/22/88 - 0.6 and 0.6 mg/l (duplicates)

When the high values were noted on September 7, 1988, 1 mediate efforts to adjust the calcium hypcchlorite dose rates resulted in too great a reduction as shown by the three low concentrations. Later in the day analysis revealed a TRC concentration of 1.1 mg/1, indicating that compliance had been restored.

When the low values were noted on September 22, 1988, a slight adjustment was made and duplicate analyses revealed restoration of compliance at 1.6 and 1.5 mg/1. ,

Both excur;sions were caused by lack of familiarity with a new type of hypochlorite tablets. An investigation has been initiated to determine if changes in design and/or operating practices can improve reliability of chlorination.

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O'Neill Page 2 I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information submitted, the information submitted is, to the best of my knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

Sincerely.

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J. E. Booker Manager, River Bend Oversight River Bend Nuclear Group JEB/LAE/RJK[dN/JVC/ch cc: Mr. Myron Knudson, Director '

Water Management Division (6W)

U. S. Environmental Protection Agency, Region VI '

Allied Bank Tower 1445 Ross Avenue Dallas, TX 75202-2733 Capitol Regional Office ,

Water Pollution Control Division '

11720 Airline Hig;iway Baton Rouge, LA 70817-1720 t U. S. Nuclear Regulatory Conuniss ian Document Control Desk  !

Washington, D.C. 20555 l U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011 -

NRC Resident laspector Post Office Box 1051 -

St. Francisville, LA 70775 4

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