ML20091L221

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NPDES Noncompliance Notification:On 810605,weekly Coliform Analysis Showed Concentration Greater than 1609 mpn/100 Ml. Caused by Contaminated Sodium Thiosulfate Containers Used for Dechlorination.Housekeeping Frequency Increased
ML20091L221
Person / Time
Site: Calvert Cliffs  Constellation icon.png
Issue date: 07/24/1981
From: Russell L
BALTIMORE GAS & ELECTRIC CO.
To: Riggin R
MARYLAND, STATE OF
Shared Package
ML20091K978 List:
References
NUDOCS 9201270321
Download: ML20091L221 (1)


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.'. y'AG B ALTIMORE G AS /sND ELECTRIC COMP ANY P.O BOX 14 7 5 D A LTIM O R C. M A R Y L A N D 212 o 3 HUCLE AR POWLR DEPARTMENT CALVERT CLIF F $ NUCL E A R PonER PL ANT LV59Y. MARYLAND 20657 July 2h, 1981 State of Mary 1.tnd Office of Environmental Programs Waste Management and Enforcement Program Taves State Office Building Annapolis, Maryland 21h01 Attention: Mr. Raymond E. Riggin Be: Maryland State Discharce Permit No. Th-DP-0187 A (I.'PDES No. PD 0002399)

Dear Mr. Riggin:

On June 5,1981, veekly colifom an'slysis showed a concentration of

>1609 mpn/100 ml. This result is above the 70 rpn/100 ml pemitted by the reference permit. The cause has been determined to be conted-nation in the sodium thioculfate containers used for dechlorination.

<- A coliform test was perfom,:d on the sodium thiosulfate containers a .i the results indicated high colifom concentrations; the containers er.i "

hoses were cleaned, chlorinated and refilled for service.

To correct this situation, housekeeping frequency has been increased.

On June 2h,1981, weekly colifom analysis showed a concentration of 228 mpn/100 m1, again above the allowable limit. An inspection of the system showed solida carryover into the chlorinc contact tank. n.e

- chlorine contact tank was drained and cleaned. To correct this situa-i or. .

the chlorine contact tank vill be inspected for possib1c contaninatic .

whenever normal effluent surveillance is performed.

Cincerely yours, 114 L. B. Russe]l Plant Superintendent JES/feb (q '

Jn T .

L. 6 (?.

JJ5 f 920127 M21 920116 PDR ADOCK 05000317 S ,

PDR

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