ML20069H351

NPDES Noncompliance Notification:On 820914,total Suspended Solids & Iron at Outfall 001c Low Vol Waste Wastewater Treatment Facility Exceeded Allowable Limits.Caused by Upset Ph Due to Unit 2 Const Activities

ML20069H351
Person / Time
Site:	LaSalle
Issue date:	09/29/1982
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20069H346	List: ML20069H344 ML20069H351
References
NUDOCS 8210190514
Download: ML20069H351 (1)

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i T AC1771 COUNTY NUCI.ZAR GENERATING STATICN N.P.D.E.S. PERMIT NO: ILOO48151 NONCOMPLIANCI REPORT i

DISCHARGE NUMBER AND DESCRIPTION: Octfall 001c Low Volume Waste Wastewater treatment facIIIty PARAMETER AND ?!RMIT LIMIT: Total Suspended Solids 15 mg/l Total tron 1.0 mg/l NONCOMPLIANCE, DATE, AND DURATION:

Total Suspende, Solids,150 mg/1,14 September 1982, 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Total Iron 67 0 mg/1,14 September 1982, 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> CAUSE OF NONCCMPLIANCE:

The wastewater plant pH was upset during this period due to Unit 2 construction activi ties . An acidic floor cleaning solution was used to prepare the floors for painting. The upset pH degraded the efficiency of flocculation and filtration.

CORRECTIVE ACTION:

A work request has been initiated to Install an Inline pH monitor at the

, WWTF. Installation of this equipment, and logic to trip the equalization t:nk transfer p imps on conditions of high or low pH should prevent this from occurring i

• the future.

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- DATE RECOGNIZED AS, A VIOMT'9f':

27 September 1982

..l DATE INVESTIGATED:

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