ML20151K142

Requests Temporary Approval to Discharge Effluent from Dewatering of Dredge Matl to Stormwater Outfall 012 at Plant

ML20151K142
Person / Time
Site:	Limerick
Issue date:	07/30/1997
From:	Matty R PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Newbold J PENNSYLVANIA, COMMONWEALTH OF
References
NUDOCS 9708050347
Download: ML20151K142 (11)

Text

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, g. l PECO ENERGY nn:=i=""v

j PO Box 8699

" PhiladelpNa, PA 19101-8699 215 841 4000 July 30,1997 Mr. James Newbold Chief, Permits Section

, 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 This letter is being sent to request a temporary approval to discharge effluent  !

from the dewatering of dredge material to stormwater outfall 012 at Limerkk l Generating Station. Maintenance dredging will be performed in the Schuylkill River intake Structure Wet Wells.

The sediments will be removed and placed in a low lying area adjacent to the pump house (see attached site map). Water from the dredge material will be discharged through a standpipe to outfall 012 at a discharge rate of approximately 200 gpm. To control the discharge of solids to the river, the ,

standpipe will be covered with a 200 micron mesh canvas material. The l

estimated discharge volume over the length of the project is 0.5 million gallons.  ;

Approximately 60 cubic yards of dredge materialis expected to be removed from the wet wells. Once dewatered, the sediments will be disposed at a permitted I waste management facility. The project is scheduled to begin August 8,1997,  ;

and will operate for five days over a four week period. Therefore, your prompt i attention to our request would be appreciated.

Please note approval of this temporary discharge was previously granted by PaDEP in July 1993 and August 1996. Enclosed for your information is a copy of the 1996 approval as well as sampling data obtained during the 1993 and 1996 dredge dewatering operations.

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• 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 Limerick Generating Station, Units 1 and 2, Environmental Protection Plan, Section 3.2, which stipulates that the USNAC shall receive a copy of any proposed changes to the NPDES permit at the same time that the permitting agency is notified.

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

Sincerely, Robert M. Ma y, Jr.

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

H. J. Miller, Administrator, USNRC, Region 1 N. S. Perry, USNRC Senior Resident inspector, LGS 4

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,,,jg Pennsylvania Department of Environmental Protection Lee Park, Suite 6010 555 North Lane Conshohocken, PA 19428 Southeast Regional Office August 9, 1996 610-832-6130 ;

AUG 211996 Fax 610-832-6133 Robert M. Matty, Jr. R. M. Ma lTY, JR.

Engineer, Environmental Affairs  !

l PECO Energy Company 2301 Market Street l 4

PO Box 8699 Philadelphia, PA 19101-8699 Re: Limerick Generating Station WQ/GeneralIW Correspondence Limerick Township Montgomery County

Dear Mr. Matty:

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This is in response to your July 10,1996 letter requesting approval to discharge wastewater generated from the dredging operation of the Schuylkill River Pumphouse Wet Wells at the Limerick Generating Station. The discharge is expected to occur for one week beginning August 12,1996.  ;

The wastewater will discharge to the Schuylkill River through a standpipe to stormwater Outfall 012 at a maximum flow rate of 200 gpm. We hereby approve your request to discharge subject to the following conditions:

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1. The following discharge requirements shall be met.

A. The discharge shall not contain any substances in concentration or amounts sufficient to be inimical or harmful to the water uses to be protected or to human, animal, plant, or aquatic life.

B. pH: 6.0 to 9.0 Standard Units C. Iron: as total iron and as dissolved iron shall be monitored daily.

D. Oil and Grease: shall be monitored daily.

E. Total Suspended Solids: shall be monitored daily.

An Equal oppatunW/Mnutive Acuan Ernployer http//www dep state pa us Pnnted on Recyded Paper

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. . i Robert M. Matty, Jr. August 9, 1996 l l

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2. The wastewater discharge to the stormwater Outfall 012 shall be monitored daily for the l above pollutants until the discharge ceases. A composite sample must be collected for l

iron and total suspended solids and a grab sample for pH and oil and grease.

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- 3. The monitoring reports shall be submitted to:

Pennsylvania Department of Environmental Protection Field Operations - Water Management Lee Park, Suite 6010 555 North Lane Conshohocken, PA 19428

4. This approval shall expire upon completion of the above dredging operation.

If you have any questions, please contact Sohan Garg of our staff.

Sincerely, f.D ,

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Joseph A. Feola l

Regional Manager Water Management cc: Montgomery County Health Department - '

Delaware River Basin Commission Limerick Township Mr. O'Neil Mr. Newbold Mr. Ryan ,

Re 30 (KAL)212.24 l

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,% Pennsylvania Department of Environmental Protection Lee Park, Suite 6010 555 North Lane RECEIVED Conshohocken, PA 19428 August 20,1996 AUG 211996 Southeast Regional Office M'IN.dh.db Fax 610-832 6133 Robert M. Matty, Jr.

Engineer, Environmental Affairs PECO Energy Company 2301 Market Street PO Box 8699 Philadelphia, PA 19101-8699 Re: Limerick Generating Station WQ/ General IW Correspondence Limerick Township Montgomery County l

Dear Mr. Matty:

On August 9,1996 authorization to discharge wastewater from the dredging of the Schuylkill River .

Pumphouse wet wells of the Limerick Generating Station to the Schuylkill River was granted. The one week  !

dredging of the wet wells was scheduled to begin August 12,1996. The wastewater from the dredge material discharges to the Schuylkill River at Outfall 012 of the NPDES Permit PA0051926.

On August 12,1996 during our telephone conversation and through your August 12,1996 letter it was told that the dredging would be done in the Schuylkill River at a location just in front of the intake structure of the Limerick Generating Station instead of the pumphouse wet wells.

We have completed our review of the information contained in your August 12,1996 letter and hereby approve your request subject to the conditions 1 through 4 of our previous approval dated August 9,1996.

If you have any questions, please contact me.

Uincerely, V

Sohan L. Garg Environmental Engineer III Water Management cc: Montgomery County Health Department Delaware River Basin Commission Limerick Township Mr. O'Neil Mr. Newbold Mr. Ryan Re 30 (KAL)232.18 An tquai opponun murirmauve Act.on tmpiover http>/www den state pa.us e,ntee on accycice eaper h

DISCHARGE MONITORING REPORT SUPPLIMENTAL FORM Forthe MONTH Aug-Sept 1996 LIMERICK GENERATING STATION Limerick Township Montogomery County j DATE G {ypH 4e jTSS .

. - O&G, -  : Iron (dis) fron(total) idI!sTD s -:mpf myr ' - mpf :.

mpf 4 26-Aug 7.2 126.9 1.4 0 029 5 0768 27-Aug 7.44 221.3 0.9 0.035 8.1837 28-Aug 7.54 160 1.2 0.52 5.9904

29-Aug 7.57 125.5 1.6 0.022 3.8378 30-Aug 7.36 180 0,9 0.015 5.256 4-Sep 7.33 205 1.2 0.014 4.596 5-Sep 7.44 116.5 2.8 0.019 2.845 t

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. Labo'ratory Name : VF Labs in House?

Signature REMARKS: ,

Telephone: (610) 718-2711 G +3 e e

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COMMONWEALTH OF PENNSYLVANIA  ?

-4 PE N N 5 YLVA NI A DEPARTMENT OF ENVIRONMENTAL RESOURCES h FIELD OPERATIOtG - WATER MWAGEMENI' PROGRAM N Ice Park, Saite 6010 555 North Lane Conshohocken, PA 19428 215 832-6130 RE EIVED July 1, 1993 JUL 5 993 1

George M. Nrley 3. E h RM Manager, Environnnntal Affairs Philadelphia Electric Ccupany 2301 Market Street Philadelphia, PA 19101 Re: Limerick Generating Station

' NQ: General IW Correspondence Linurick 'Ibwnship 4 & ntga nry County l l

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Dear Mr. N rley:

1 This is in response to your letter of June 18, 1993 requesting approval to 2

• discharge wastewater generated from the dredging operation of the Schuylkill River Punphouse Wet Wells at the Idnerick Generating Station. The discharge is expected to occur for one week.

The wastewater will discharge to the Schuylkill River through a standpipe to stornwater Outfall 012 at a max 1num flow rate of 200 gpm. We hereby approve your request to discharge subject to the follow 2ng conditions:

1. The following discharge requirements shall be net. These requirements i

supersede the conditions contained in our previous approval dated June 15, 1993:

A. The discharge shall not contain any substances in concentration or

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anounts sufficient to be inimical or hannful to the water uses to be protected or to human, animal, plant, or aquatic life. I B. PH - 6.0 to 9.0 Standard Units

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C. Iron - as total iron and as dissolved iron shall be nonitored daily. i D. Oil and Grease - shall be nonitored daily.

E. 'Ibtal Suspended Solids - shall be nonitored daily.

2. The wastewater discharge to the Stornwater Outfall 012 shall be nonitored daily for the above pollutants until the discharge ceases. A cmposite sanple nust be collected for Iron and Total Suspended Solids and a grab sanple for PH and Oil and Grease.

An Equal Opportunity /Affirmatise Action Employer Recycled Paper

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C George M. Morley July 1, 1993 3 .

i 3. ~ The monitoring reports shall be subnitted to:

Pennsylvania Department of Environmental Resources Field Operations - Water Managanent 4 Suite 6010, Ise Park 555 North Lane 4

Conshohocken, PA 19428

4. This approval shall expire on July 10, 1993 or ccarpletion of dredging operation whichever cecurs earlier.

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If you have any questions, please contact Sohan L. Garg of our staff.

V .truly yours,

/Yf JOSEPH A. FEDIA Water Managenent Pr+mu Manager i

_cc:. Montgcznery County Health Depart 2 rent  !

DRac  !

Operations Section Limerick Township.

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, . PHILAD ELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101 (21518414000 September 1,1993 Department of Environmental Resources Field Operations - Water Management Suite 6010 Lee Park 555 North Lane Conshohocken, PA 19428 Gentlemen:

Limerick Generating Station NPDES Pennit No. PA0051926 Discharge of Effluent from Dredee Material to the Schuvikill River Enclosed are the sampling results from the subject dredging operation at Limerick Genemting Station.

As per the approval letter (attached), outfall 012 was monitored for pH, total iron, dissolved iron, total suspended solids and oil and grease. The duration of the operation was four days,8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> a day. Please note that the samples for total iron, dissolved iron and total suspended solids were not composited. Four samples were taken daily and each sample analyzed individually for the required parameters. Whtle the approval requested composite sampling, the sampling and analyses performed provides a more detailed characterization of the effluent.

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

Sincerely, l 4

A

'J George M. Morley /

Manager Environmental Affairs Attachment A

• i Chemistry Laboratory-Corporate Laboratories Division Station Support Department Analysis of Sludee Pit Discharee Water SanipJgs Report No. CL - 29043 Limerick Generating Station June 30,1993 Laboratory Sample Nos. A-7888 to A-7898: Eleven (11) water samples from Schuylkill River Pumphouse Sludge Pit l l Discharge. Received for analysis on June 24,1993.

Purpose of Analysis The purpose of the analysis was to determine the suspended solids, pH, soluble and insoluble iron and oil and grease concentrations in the water samples. J Analysis The water samples were analyzed by Flame Atomic Absorption Spectroscopy (AA) for iron. Oil and grease was determined by extracting the oil and grease from the samples with freon and analyzing the extracts by Infrared l Spectrophotometry (IR). The suspended solids (TSS) was determined by filtering a known volume of sample through a filter l and weighing the filter before and after filtration. pH was determined potentiometrically using a pH electrode.  ;

1 Results I Sample Date/ Time Concentration in mg/L Number Sampled pH A-7888 6/22/93 0920 - -

1.1 - -

A-7889 6/22/93 0920 7.36 116 -

0.677 4.598 A-7890 6/22/93 1130 7.45 32 -

0.395 1.184 A-7891 6/22/93 1330 7.50 26 -

0.396 0.963 A-7892 6/22/93 1520 7.50 21 -

0.317 0.874 A-7893 6/23/93 0830 - -

0.9 - -

A-7894 6/23/93 0840 7.74 32 -

0.148 1.115 A 7895 6/23/93 1040 7.76 27 -

0.134 1.055 A-7896 6/23/93 1250 7.58 9 -

0.181 0.419 A-7897 6/23/93 1445 7.58 9 - 0.179 0.415 A-7898 6/23/93 1610 7.53 12 -

0.131 0.569 Analysis by: JRG/ DIE

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l Approved: -

• G.C. Sprissler

Manager, Chemistry Laboratory

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cc: C. G. Diehl (Limerick Generating Station SSB3-1), J. R. George, Jr., File

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%*,' Chemistry Laboratory Corporate Laboratories Division

, , Station Support Department Analysis of Sludge Pit Discharne Water Samnies Report No. CL - 29044 Limerick Generating Station July 7,1993 Laboratory Sample Nos. A-7903 to A-7913: Eleven (11) water samples from Schuylkill River Pumphouse Sludge Pit Discharge. Received for analysis on July 1,1993.

Purnose of Analysis The purpose of the analysis was to determine the suspended solids, pH, soluble and insoluble iron and oil and grease concentrations in the water samples.

AUalysi The water samples were analyzed by Flame Atomic Absorption Spectroscopy (AA) for iron. Oil and grease was determined by extracting the oil and grease from the samples with freon and analyzing the extracts by Infrared l Spectrophotometry (IR). The suspended solids (TSS) was detennined by filtedng a known volume of sample through a filter and weighing the filter before and after filtration. pH was determined potentiometrically using a pH electrode.

Rcults Sample Date/ Time Concentration in mg/L Number Sampled pH TSS Oil & Grease Iron (Soluble) Iron (Insoluble)

A-7903 6/24/93 0830 6.99 58 -

0.052 1.989 A-7904 6/24/93 0835 - -

< 0.8 - -

A-7905 6/24/93 1030 7.00 58 -

0.080 1.825 A-7906 6/24/93 1240 7.15 6 -

0.060 0.232 A-7907 6/24/93 1445 7.12 6 -

0.052 0.178 I A-7908 6/28/93 0915 - -

<0.8 - -

A-7909 6/28/93 0920 7.50 13 -

0.264 0.619 A-7910 6/28/93 1120 7.48 14 -

0.309 0.562 A-7911 6/28/93 1320 7.53 13 -

0.272 0.605 A.7912 6/28/93 1520 7.39 10 -

0.229 0.346 A-7913 6/28/93 1630 7.40 10 -

0.244 0.315 Analysis by: JRG/RJM

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Approved: -

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G.C. Sprissler Manager, Chemistry Laboratory l

cc: C. G. Diehl (Limerick Generating Station SSB3-1), J. R. George, Jr., File