ML20116M112

Forwards Corrected Total Suspended Worksheet

ML20116M112
Person / Time
Site:	Limerick
Issue date:	08/15/1996
From:	Matty R PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Garg S PENNSYLVANIA, COMMONWEALTH OF
References
NUDOCS 9608200027
Download: ML20116M112 (3)

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PECO ENERGY ;gox:g,7 PO Box 8699 Philadelphia, PA 19101 8699 215 841 4000 August 15,1996 Mr. Sohan Garg Department of Environmental Protection Bureau of Water Management Lee Park, Suite 6010 555 North Lane Conshohocken, PA 19428

Subject:

Limerick Generating Station NPDES Permit No. PA0051926 Total Suspended Solids Calculation Worksheet

! Enclosed is a copy of the subject Total Suspended Solids (TSS) Worksheet.

l The worksheet has been corrected to include the Perkiomen Creek as a sampling point in Step 1. As per our recent telephone conversation, make-up ,

, water for the cooling towers is withdrawn from either the Schuylkill River or the l l

Perkiomen Creek (dependent on temperature and flow conditions in the l Schuylkill River). Therefore, to obtain an accurate background TSS level, the appropriate make-up source should be sampled as part of Step 1.

I A copy of this letter (including any attachments or enclosures) is being sent to the U.S. Nuclear Regulatory Commission (USNRC), in accordance with the i Limerick Generating Station, Units 1 and 2, Environmental Protection Plan, Section 3.2, which stipulates that the USNRC shall receive a copy of any proposed changes to the NPDES permit at the same time that the permitting i agency is notified.

If you have any questions or require additional information, please contact me at (215) 841-5177.

Sincerely, Robert M. Matt , Jr. y I

(

Engineer -

[- h>

1 Environmental Affairs 9608200027 PDR 960815 ADOCK 05000352 PDR i

l

Attachment cc: U.S. Nuclear Regulatory Commission, Document Control Desk (Docket Nos. 50-352 and 50-353 & License Nos. NPF-39 and NPF-85)

T. T. Martin, Administrator, USNRC, Region 1 N. S. Perry, USNRC Senior Resident Inspector, LGS Mr. Ronald Rulon Delaware River Basin Commission

DETERMINATION OF TOTAL SUSPENDED SOLIDS (NTT) WORKSHEET a

1. Obtain a grab sample from Schuylkill River and/or Perkiomen Creek on 4 consecutive days and composite using the following formula:

Day 1 -7% (35ml) / Sampled by / Date and Time Day 2 - 15% (75ml) / Sampled by/ Date and Time Day 3 -27%(135 ml) / Sampled by/ Date and Time  ;

Day 4 -51%(255ml) / Sampled by / Date and Time

2. On the fourth day, initiate a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> composite sample of Outfall 001.

/ Started by/Date and Time

3. On the fiAh day, retrieve the 001 composite sample.

/ Collectedby/Date and Time

4. Analyze Schuylkill River composite for silica mg/l /

Analyzed by / Date and Time

5. Analyze 001 composite for silica.

I mg/l /

Analyzed by / DateandTime

6. Determine concentration factor; 001 Silica = CF I River Silica

7. Analyze River composite for TSS.

mg/l /

Analyzed by / Date and Time

8. Determine backgroundTSS. ,

)

(River Composite) X (Concentration Factor) = l

( )X( )= mg/l

9. Analyze 001 composite forTSS mg/l /

Analyzed by / Date and Time i

10. Determine Net TSS (001 Composite TSS) - (Background TSS) =

{ )-( )= mg/l NOTE: For computing averages for DMR reporting and for determining permit complience, all "less than  :

zero" results must be counted as zero values. l 1

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