ML20091L176

NPDES Noncompliance Notification:On 820831-0901,approx 6,800 Gallons of 5.9 Ph Water Was Discharged Via Outfall 104 to Chesapeake Bay.Caused by Improper Valve Closure on Inlet of Discharge Tank.Preventive Maint Schedule Implemented

ML20091L176
Person / Time
Site:	Calvert Cliffs
Issue date:	09/15/1982
From:	Russell L BALTIMORE GAS & ELECTRIC CO.
To:	Parise 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 9201270297
Download: ML20091L176 (2)

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B ALTIMORE G AS AND ELECTRIC COMPANY P 0. B O X 14 7 5 B ALTIM OR c, M A R Ya A N D 212o3 WCL! AR PottR DEPARTMENT C ALVERT CLIF FS NUCLE AR POWCR PL AN1 LU4Y. MARYL AND *t4 l?

Sept erber 15, 1982 -

Office of Elvironmental Programs Waste Management Administration # l 201 Vest Preston Street 4' Baltimore, Mr.ryland 21201 Attention: Mr. Bonald Parise Dear Mr. Parise Between the hours of 2230, August 31,1982 c.t.d 0530 on September 1,1982, approxicately 6,600 gallons of 5 9 pH vater vas discharged via outfall 10L This crattall discharges to thg main cooling discharge conduit where it is diluted with approx $ rate 3y 10 cpm vater flev prior'to entering tne Chesape'ake B ay .

The discharge was caused by en improper valve c'leaure.on the inlet cf a dis-charging tank due to ..echanicta failure of the valve. The valve seemed to be shut, as indicated by turning pressure of the *valve hand vbeel, when in f act, the valve remained partial?.y open. It vas determined later that the

/ valve with force could be shut. The valve was repaired September 6,1982.

The noncomplying discharge was noted by an operator during his normal rounds, being aware that the tank should have completely drained by that time, and not - seeing a level increase in the on service tank. When he noted the dis-charge taking place, he shut the tank discharge valve to etop the discharge.

The source of the discharge was from two floor sumps which pumps cycle on and off according to the sunp level. The sumps contained relatively clean water from pump leak-effs, effluents from in-line conductivity cells , and valve-leakage. The flov'teing discharged with one pump running ic eptroximately ,

200 Epm.

The three critica.1 valves (tvo inlet, one drain valve) on each tank (2) have been placed on a regular preventive maintenance schedule, to be inspected, cleaned and repaired on an ar.nual basis.

-9201270297 920116 PDR ADOCK 05000317

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Mr. Ronald Parise '

Page 7vo

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l Attached $ s the environmentti imptet assessment report, j Very truly yours, i

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L. B. Russell '

Pirmt Superintendent  ;

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