ML20207E900

Forwards NPDES Discharge Monitoring Repts for Nov 1986. Noncompliances Noted Re Total Iron Discharges from Cooling Tower Blowdown (Outfall 071) & Total Suspended Solids Discharged from Sewer Treatment Plant (Outfall 079)

ML20207E900
Person / Time
Site:	Susquehanna
Issue date:	12/26/1986
From:	Fields J PENNSYLVANIA POWER & LIGHT CO.
To:	Koval P PENNSYLVANIA, COMMONWEALTH OF
Shared Package
ML20207E906	List: ML20207E900 ML20207E916
References
PLE-9019, NUDOCS 8701050194
Download: ML20207E900 (3)

Text

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PP&( Pennsylvania Power & Light Company Two North Ninth Street

• Allentown, PA 18101

• 215 / 770L5151 December 26, 1986 Mr. Paul Koval Chief, Operations Section Bureau of Water Quality Management Pennsylvania Department of Environmental Resources 90 East Union Street, Second Floor Wilkes-Barre, PA 18701-3296 SUSQUEHANNA STEAM ELECTRIC STATION DISCHARGE MONITORING REPORT NOVEMBER 1986 NPDES PERMIT NO. PA 0047325 CCN 741326 FILE R9-8A PLE-9019

Dear Mr. Koval:

Enclosed is a copy of the November 1986 Discharge Monitoring Report for Permit No. PA 0047325. There were twc noncompliances in November and they were for total iron discharged from the Cooling Tower Blowdown (Outfall 071) and total suspended solids (TSS) discharged from the Sewage Treatment Plant (STP),

(Outfall 079).

o OUTFALL 071 - COOLING TOWER BLOWDOWN The average concentration limit for total iron of 6.8 mg/l was exceeded for the month of November with an average of 7.5 mg/1. The cause of this violation was high total iron in the river due to heavy rains. The highest concentratinn of total iron in the cooling tower blowdown was 10.02 mg/l sampled on 11/13/86. River samples analyzed for total iron on 11/10, 11/11, and 11/12 contained 3.5 mg/1, 6.62 mg/l and 5.70 mg/l respectively.

o OUTFALL 079 - SEWAGE TREATMENT The instantaneous maximum concentration limit for TSS of 60 mg/l was exceeded on November 21 with a value of 68 mg/1. The average concentration limit for the month of 30 mg/l was exceeded with an average of 37.6 mg/1.

Two possible reasons for the high TSS are lower sewage flows to the STP and colder temperatures decreasing bacteriological activity in the STP, The attached graph, Temperature versus Turbidity, shows that a decrease in average bed tempercture increases average effluent turbidity. High turbidities indicate higher TSS.

Two short-term solutions being reviewed to resolve the TSS noncompliances are:

o Recycle reactivator blowdown to reactivator, or o Warm STP beds to increase bacteriological activity e Two long-term solutions proposed to management for treatment of the reactivator blowdown solids are to construct the following:

8701050194 361226 PDR ADOCK 05000387 ig R PDR g

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a. %r = 1 o 'Sattling/ Drying Pond, or o Sand Drying Beds The Pennsylvania Department of' Environmental Resources (Pa DER) will be notified of the selected option. Permitting requirements will also be reviewed with the Pa DER.

If you have any questions, please call me at (215) 770-7889.

Respectfully yours, ND gq ,

Jerome S. Fields Senior Environmental Scientist-Nuclear jsf/ltm7651:cly ,

Enclosure cc:

EPA, Region III E. Adensam, NRC A

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