ML20247F122

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NPDES Discharger Self-Monitoring Rept for Apr 1989. Water Quality Violations Noted Re High Total Coliform Results & High Biological Oxygen Demand
ML20247F122
Person / Time
Site: Rancho Seco
Issue date: 04/30/1989
From: Keuter D
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To: Martin J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
AGM-NPP-89-251, NUDOCS 8905300007
Download: ML20247F122 (4)
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{{#Wiki_filter:- _ - - r: j- $SMUD SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, P.o. Box 15830, Sacramento CA 95852 1830.(9161 4s2 3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CALIFORNIA AGM/NPP 89-251 dN I r rm U. S. Nuclear Regulatory Commission Attn: J. B. Martin, Regional Administrator Region V 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596 Docket No. 50-312 Rancho Seco Nuclear Generating Station License No. DPR-54 NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)

Dear Mr. Martin:

As a condition of the approval of Amendment No. 45 to Facility Operating i License No. DPR-54, the District agreed to provide the NRC with a copy of any changes to the NPDES discharge permit and any permit violdtions. Attached is ) a copy of the monthly Discharger Self Monitoring Report for March 1989. This report makes note of water quality violations. 1. The high total coliform results obtained during the month of April are attributed to high chlorine demand and higher chlorine residue needed to control bacteria caused by higher that normal organic loading on the sewage plant terraces. One terrace has been reworked and the other i terraces are scheduled to be reworked to reduce the organic solids buildup. Chlorine feed to the sewage plant effluent has been increased to help ensure the total coliform results are maintained within the limits. i 2. The high Biological Oxygen Demand (BOD) results during April are attributed to high buildup of organic solids on the terraces and warmer temperatures. The terraces are in the process of being reworked. Members of your staff with questions requiring additional information or clarification may contact Mr. George Campbell at (209) 333-2935, extension 4147. Sincerely, l bEIW fptnR.Keuter Assistant General Manager Nuclear Plant Manager 8905300007 890430 Attachment {DR ADoCK0500g2 cc w/atch: A. D'Angelo, NRC, Rancho Seco j I, Document Control Desk, Washington DC

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