ML20091L287

NPDES Noncompliance Notification:On 811012,free Available Chlorine Determined to Be .7 mg/1.On 811121,recorded Reading of 1.5 Mg/L Free Available Chlorine.On 811029,determined Coliform Reading of 345 MPN/100 Ml

ML20091L287
Person / Time
Site:	Calvert Cliffs
Issue date:	02/04/1981
From:	Russell L BALTIMORE GAS & ELECTRIC CO.
To:	Riggin R MARYLAND, STATE OF
Shared Package
ML20091K978	List: ML20091K975 ML20091L030 ML20091L034 ML20091L051 ML20091L061 ML20091L072 ML20091L085 ML20091L102 ML20091L111 ML20091L131 ML20091L142 ML20091L147 ML20091L153 ML20091L158 ML20091L170 ML20091L176 ML20091L188 ML20091L196 ML20091L211 ML20091L218 ML20091L221 ML20091L228 ML20091L229 ML20091L251 ML20091L264 ML20091L277 ML20091L287 ML20091L293 ML20091L300
References
NUDOCS 9201270346
Download: ML20091L287 (2)

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I' B ALTIMORE G AS AND ELECTRIC COMPANY P.O. B O X 14 7 5 B A L TI M O R E. M A R Y L A N D 21.2 0Y NOCLE AR POWER OEFARTMENT C A L VE RT C LIF FS NUCL E A R PowE R PL AN Y LUSBY, M ARYL ANO 2C457 February h ,1981 State of Maryland Office of Environmental Programs Waste Management and Enforcement Program Taves State Office Building Annapolis , Maryland 21h01 Attention: Mr. Paynond E. Riggin Ee: Maryland State Pischarge Permit No. TL-DP-0187A (NPDES No. MD 0002399)

Dear Mr. Riggin:

During completion of the quas .erly report , it was noted that there vere violatiens of outfall 101 requirements not previously reported in accordance with section II.B.2 of the Maryland State Discharge 3 Permit No. Th-DP-0187A. Infomation concerning these violations is presented below:

1) On October 12, free available chlorine was determined to be ,

. 0 7 mg/1. The chlorine level was reduced to 40.1 mg/l on October 1b. An overadjustment of the pump stroke or the chlorine pump resulted in a slight increase over the pemit requirement of 0.5 mg/1.

2) On November 21, L reading of 15 mg/l free available chlorine -

was recorded. The cause was identified to hav' resulted from an improp'- hatched chlorine storage tank. srrective action v- Miated and the concentration reduced to <0.1 mg/l on the 2 k _f Ebeember. To prevent recurrence of thia incident all technicians will be retrained on the procedure of batching chlorine c ncentrate tanks.

3) On October 29, a ec.11 form reading of 3h5 mpn/100 mi s as deter-cined. This is a violation of section I.D. of the Mary)and State Discharge Permit No. Th-DP-0187A. The event was believed to be caused by an unusually high flow to the r,ewage plant soon after the start of a refueling outage. This surge substantially in-creased tne flow in the chlorine contact tank, which, in turn, reduced the chlorine contact time. This contact time was too short to provide proper disinfection. To c4 rrect this situntion, 9201270346 920116 PDR ADOCK 05000317 S PDR Y  :

Mr.lBaynond E. Riggin Pace 2 the chlorine concentration was increased in the contact tank and the recirculation flow ' path to the plant was adjusted to absorb sur6es to prevent recurrence.

b) On October 22, the tevnge treatment plant discharge suspended solids- concentration was determined to be h8.8 mg/1, primarily due to exceptionally high flow. This is grt eter than the i allowable h5 mg/l authorized by section I.D. of the reference permit. In addition, the monthly average suspended solide i concentration was calculated to be 315 mg/1, above the permit specification of 30 mg/1. l To insure compliance with the reporting requirements of the Maryland State Discharge Permit, all technicians have been reinstructed to inform the i appropriate supervisor (s) lor all uut-of-specification chemistry parameters. -l Sincerely yours, L'. ..

44f B. Russell Plent Superintendent GEB:feb l

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