ML20115D716

Requests Temporary Approval to Discharge Effluent from Dewatering of Dredge Matl to Stormwater Outfall 012 at Lgs. Sediments Will Be Removed & Placed in Low Lying Area Adjacent to Pump House.Project Scheduled to Begin 960805

ML20115D716
Person / Time
Site:	Limerick
Issue date:	07/10/1996
From:	Matty R PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Newbold J PENNSYLVANIA, COMMONWEALTH OF
References
NUDOCS 9607150243
Download: ML20115D716 (7)

Text

l'- -

. =

PECO ENERGY  ;=cg:,7 "

ladelph a PA 19101 8699 215 841 4000 July 10,1996 Mr. James Newbold l Chief, Permits Section Department of Environmental Protection -97 Bureau of Water Management $ D ' N '.,

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 Limerick Generating Station. Maintenance dredging will be performed in front of the Schuylkill River Intake Structure to restore the area to post-construction elevations. The dredging will be performed under PaDEP Construction Permit No.19616.

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 j 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 estimated discharge volume over the length of the project is 0.75 million gallons.

Approximately .20.0 cubic yards of dredge material is expected to be removed from in front of the intake structure. Once dewatered, the sediments will be disposed of at a permitted waste management facility. The project is scheduled l to begin August 5,1996, and have a duration of approximately one week.

Therefore, your prompt attention to our request would be appreciated.

t 9607150243 960710

~

fDR ADOCK 0500005g ,g "o"

~<

y a s j, l

i l

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

A copy of this letter (including any attachments or enclosures) is being sent to l 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 USNRC 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 additionalinformation, please contact me at (215) 841-5177.

Sincerely,

-D <

l Robert M. Matty, Jr.

j Engineer Environmental Affairs l l 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 l

l

e t .

PHILADELPHIA ELECTRIC COMPANY l 2301 MARKET STREET  !

P.O. BOX 8699 PHILADELPHIA. PA.19101 I

(215184l4000 September 1,1993

' Department of Environmental Resources Field Operadons - Water Management Suite 6010. Lee Park 555 North Lane Conshohocken, PA 19428 l

Gentlemen:

Limerick Generating Station NPDES Permit No. PA0051926 Discharge of Effluent from Dredce Material to the Schuylkill River Enclosed are the sampling results from the subject dredging operation at Limerick Generating Staticn.

As per the approval letter (attached), outfall 012 was monitored for pH, total iron, dissolved iron, total suspended solids and oil and grease. The duradon 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 l 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. While the approval requested  ;

composite sampl:ng, 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,

/

Geor e M. Morley Manager Environmental Affairs Attachment bec: J. M. Madara. Jr. w/o attachment D. R. Helwig R. W. Boyce W. F. McElroy

D. B. Fetters w/ attachment R. Fritchley F. D. Lear CCD "

4

~ '

Chemistry Laboratory Corporate Laboratories Division Station Support Department Analysis of Sludee Pit Discharee Water Samoles 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 Discharge. Received for analysis on June 24,1993.

Purnose of Analvsis 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.

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 Spectrophotometry (IR). The suspended solids (TSS) was determined by filtering a known volume of sample through a filter and weighing the filter before and after filtration pH was detennined potentiometrically using a pH electrode.

Results Sample Date/ Time Concentration in mg/L

' Number Sampled pH TSS Oil & Grease Iron (Soluble) Iron (Insoluble)

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 1.1S4

]

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 l

Analysis by: JRG/VMB j f.

l .s

/ f/Cheft //

1 Approved: - [-

I G.C. Sprissler j Manager, Chemistry Laboratory

' /

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

l

. Chemistry Laboratory

{

. . Corporate Laboratories Division Station Support Department Analysis of Sludge Pit Discharge Water Samoles 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.

Puroose 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.

Analysis The water samples were analyzed by Mame 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 Spectrophotometry (IR). The suspended solids (TSS) was determined by filtering a known volume of sample through a Ulter and weighing the filter before and after filtration. pH was determined potentiometrically using a pH electrode.

Results 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 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 I 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 Approved: NC-G.C. Sprissler Manager, Chemistry Laboratory cc: C. G. Diehl (Limerick Generating Station SSB3-1), J. R. George, Jr., File l

. r"'_

COMMONWEALTH OF PENNSYLVANIA l

I PE N N S YLVA NI A DEPARTMENT OF ENVIRONMENTAL RESOURCES k, FIELD OPERATIONS - WATER MANAGEMENT PROGRAM Ice Park, Suite 6010 555 North Lane Conshohccken, PA 19428 l 215 832-6130 l RE EIVED l

July 1, 1993 JUL 5 1993 i

George M. Morley 1 M. LEY

Manager, Environ mntal Affairs Philadelphia Electric Ccupany

2301 Market Street Philadelphia, PA 19101 Re

Idrerick Generating Station l

NQ: General IW Correspondence Linerick Township Montgcmery County

Dear Mr. Morley:

l This is in response to your letter of June 18, 1993 requesting approval to discharge wastewater generated from the dredging operation of the Schuylkill l River Pumphouse Wet Wells at the Limerick 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 maximum flow rate of 200 gpn. We hereby approve your request to discharge subject to the following conditions:

l

1. The following discharge requirements shall be met. These requiremnts supersede the conditions contained in our previous approval dated l June 15, 1993:

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

amunts sufficient to be inimical or harmful to the water uses to be protected or to human, animal, plant, or agaatic life.

l B. PH - 6.0 to 9.0 Standard Units l C. Iron - as total iron and as dissolved iron shall be nonitored daily.

1 D. Oil and Grease - shall be nonitored daily.

E. Total 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 ccrrposite sanple nust be collected for Iron and 'Ibtal Suspended Solids and a grab l

sanple for PH and Oil and Grease.

1 An Equal Opportunity / Affirmative Action Employer Recycled Paper

( .h George M. Morley July 1, 1993 2-l

3. The monitoring reports shall be subnitted to:

i Pennsylvania Department of Environmental Resources Field Operations - Water Management i- Suite 6010, Ice Park l 555 North Iane

! Conshohocken, PA 19428 4.

This approval shall expire on July 10, 1993 or ccmpletion of dredging l cperation whichever occurs earlier.

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

I V truly yours, k.f l

JOSEPH A. FEOIA Water Management Program Manager cc: Montgtunery County Health Depart 2nent

, DRBC l

Operations Section Limerick Township 1

Re 30 (RN)181.9 1

I l

I l

\

l l

l t

1

_