CY-98-176, Provides follow-up to Addendum for 980202,0413 & 0611 Sixty Day Oil Spill Repts,Submitted on 980908.Included Are Results of Sediment Samples Collected from Connecticut River & Results of Sediment Samples Previously Taken,For Comparison

Provides follow-up to Addendum for 980202,0413 & 0611 Sixty Day Oil Spill Repts,Submitted on 980908.Included Are Results of Sediment Samples Collected from Connecticut River & Results of Sediment Samples Previously Taken,For Comparison

ML20154F227
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	10/02/1998
From:	Mellor R CONNECTICUT YANKEE ATOMIC POWER CO.
To:	Tordoff D ENVIRONMENTAL PROTECTION AGENCY
References
CY-98-176, NUDOCS 9810090119
Download: ML20154F227 (8)

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,0NNECTICUT YANKEE ATO MIC POWER COMPANY HADDAM NECK PLANT  !

362 INJUN Hou.oW ROAD e EAST HAM.PToN. CT 06424-3099 j October 2,1998 l CY-98-176 j i

Mr. David Tordoff, On-Scene Coordinator U. S. Environmental Protection Agency - Region 1 J. F. Kennedy Federal Building

. Boston, MA 02203-02211 l Mailcode HBR l Haddam Neck Plant i Follow-up to Addendum for February 2,1998, April 13,1998 and )

June 11.1998 Sixtv (60) Dav Oil Soill Reoorts

Dear Mr. Tordoff:

On February 2,1998, April 13,1998, and June 11,1998, sixty (60) day oil spill reports were I submitted to the Environmental Protection Agency (EPA) describing sheens that were observed at the water intake structure and in the discharge canal of Connecticut Yankee .

l Atomic Power Company's (CYAPCO) Haddam Neck Plant during 1997 and 1998. An addendum to those sixty day oil spill reports was submitted on September 8,1998m The .

following supplements the subject reports as further investigation has been performed to determine the cause of the sheens near the intake structure.

As referenced in past reports, bubbles were observed rising from the sediments near the intake structure. Some of these bubbles released an oily sheen when they came to the surface. These sheens collect and are absorbed on the booms surrounding the intake structure and/or across the discharge canal. Scuba divers sampled the river sediments in front of the intake structure on June 25,1998, July 1,1998 and on July 15, 1998 to try and identify the source of these bubbles. Samples were analyzed for total petroleum hydrocarbons, oil and grease, and some were analyzed for diesel range organics by Gas Chromatography Flame Ionization Detector (GC/FID). Results of these analyses showed hundreds of parts per million levels of oil and grease and total

. petroleum hydrocarbons in the sediments within the boomed area of the CYAPCO intake structure. Gl 1

), f (1) CYAPCO Letter from R.A. Mellor to Mr. David Tordoff, " Addendum to February 2,1998, April 13,1998 and June 11,1998 Sixty (60) Day Oil Spill Reports" dated September 8,1998.

9810090119 981002 PDR ADOCK 05000213 S PDR

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U.S. EPA

! CY-96176/Page 2 Based on these results, CYAPCO believes that petroleum products trapped in the river sediments were the likely cause of at least some of the sheens observed near the intake structure and in the discharge canal it appears that the petroleum products in these sediments are slowly decomposing and releasing oily sheens. These sheens then collect inside the booms around our intake structure and are carried through our plant.

In an effort to gather information regarding the potential source of the oil in the river sediments, scuba divers on September 4,1998, collected Connecticut River sediment samples upstream, downstream and across the river from CYAPCO. Results of these samples are included in Attachment A. Attachment B provides results of intake sediment samples previously submitted, and are included for comparison. The results of the samples clearly show that similar concentrations of oil and grease are present in the river sediments taken from the other locations in the Connecticut River. This is ,

consistent with our assumption that the oil and grease in the intake sediments is the result of pre-existing river sediment contamination and not the result of activities from the plant.

CYAPCO plans to continue using sorbent booms, as necessary, as a protective i

measure to prevent any future sheens from entering the environment through our cooling water system. CYAPCO will continue to periodically monitor the intake l

structure and discharge canal for oil sheens.

Should you have any questions, please call Mr. Paul Brindamour, Environmental -

l Coordinator, at (860) 267-3510.

! Very truly yours,

• l CONNECTICUT YANKEE ATOMIC POWER COMPANY "2 .

N, Russell A.Mellor l Vice President - Operations and Decommissioning I

Attachments cc: NRC, Document Control Desk Mr. William J. Raymond, NRC, Senior Resident inspector

Mr. Michael McCann, CTDEP, Oil and Chemical Spill Response

Ms. Michele DiNioa, CTDEP, Water Management Bureau l USCG, Marine Safety Office (MSO), New Haven, CT i

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1 ATTACHMENT A i 1

i ANALYTICAL RESULTS SURROUNDING AREA r.

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October 1998

e Nartherst Production AnalyticilLaboratory i Utilities System (, ;8l,;2d 3 d, MA 01090-2010 '

l Production Analytical Laboratory (413) 730-4752 Fax (413) 730-4764 l ,

To: P. Brindamour September 15,1998 From: Madhu Shah ,

Re

Analyses of Soil Samples l

Source Connecticut Yankee Lab Job Order 98-1233 l

Sample No Sampled / Received Sample Description Parameter mg/kg Date Analyzed 3687 9/4/98 Bottom Sediment Oil & Grease 153.43 09/14/98 9/9/98 -Haddam Island Petroleum Hydro Total 118.49 09/14/98 I

Stmple No Sampled / Received Sample Description Parameter mg/kg Date Analyzed 3688 9/4/98 Bottom Sediment-Salmon Oil & Grease 536.30 09/14/98 9/9/98 River Pettoleum Hydro Total 486.13 09/14/98 Simple No Sampled / Received Sample Description Parameter mg/kg Date Analyzed 3689 9/4/98 Bottom Sediment -Boat Oil & Grease 411.37 09/14/98 9/9/98 Ramp Petroleum Hydro Total 332.45 09/14/98 j.

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CY-98-176

' ATTACHMENT B ANALYTICAL RESULTS (PREVIOUSLY SUBMITTED)

INTAKE SEDIMENTS j i

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Utilities System (gsonzo o ,id u A clo9o2olo Production Analytical Laboratory (413) no.4752 Fax (413) 73o.4764 To: P. Brindamour July 14,1998 From: Madhu Shah Re: Analyses of Soil and Water Samples Source Connecticut Yankee Lab Job order 98-0887 Sample No Sampled / Received Sample DescW Parameter mg/kg DateAnalyzed 2614 SQ5/98 Intake Sediment upstream Petroleum Hydro Total 244.81 06/29/98 6/26/98 Oil & Grease 335.86 06/29/98

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Pl. see the results of GC analyses performed by Environmental Science Corp. - Diesel Range Organics - none detected

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Sample No Sampled #teceived Sample Descrip6on Parameter mg/kg Date Analyzed 2615 6/25/98 Intake Sediment down Petroleum Hydro Total 199.26 06/29/98 6/26/98 stream Oil & Grease 306.36 06/29/98 Pl. see the results of GC analyses performed by Environmantal Science Corp. Diesel Range Organics 3300 mg/kg Simple No Sampled / Received Sample Descrip6on Parameter mg/L Date Analyzed 2616 6/25/98 Intake oil skim Petroleum Hydro Total Less than 1.00 06/29/98 6/26/98 Oil & Grease Less than 1.00 06/29/98 Page 1

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P.roduction Analytical Laboratory (413) m 4752  :

Fax (413)73o-4764 i l

To: P. Brindamour July 15,1998 From: Madhu Shah Re: Analyses of Samples from CY Intake l

Source Connecticut Yankee Lab Job Order 98 0895 I Sample No Sampled /Receked Sample Desenpdon Parameter mg/kg Date Analyzed 2660 7/1/98 "A" Bay Sediment Oil & Crease 495.06 07/13/98 l 7/2/98 Petroleum Hydro Total 527.39 07/13/98 Sample No Sampled,ReceNed Sample Desenption . Parameter mg/kg Date Analyzed

( 2661 7/1/98 *B" Bay Sediment Oil & Grease 248.17 07/13/98 I I 7/2/98 Petroleum Hydro Total 274.87 l 07/13/98 I

l l Sample No Sampled / Received Cample Description Parameter mg/kg Date Analyzed l 2662 7/1/98 "C" Bay Sediment Oil & Grease 291.01 07/13/98 7/2/98 Petroleum Hydro Total 297.06 07/13/98 I

I l Sample No Sampled / Received Sample Description Parameter mg/kg Date Analyzed l

2663 7/1/98 "D" Bay Sediment Oil & Grease 593.48 07/13/98 I 7/2/98 Petroleum Hydro Total 514.74 07/13/98 i l l

! Simpl3No Sampled / Received Sampla Description Parameter mg/kg Date Analyzed

! 2664 7/1/98 log north end Oil & Grease 652.85 07/13/98 7'2.?R Petroleum Hydro Total 581.49 07/13/98 i

Simple No Sampled /Receivui Sample Descripton Parameter mg/kg Date Anatyzed 2665 7/1/98 log south end Oil & Grease 511.36 07/13/98 l

1 7/2/98 Petroleum Hydro Total 646.10 07/13/98 l

Sample No Sampled / Received Sample Descripton Parameter mg/kg Date Analyzed 2666 7/1/98 log middle Oil & Grease 384.55 07/13/98 7/2/98 Petroleum Hydro Total 380.67 07/13/98 Paae 1

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Lab Job order 33 0896 Sample No Sampled / Received Sample Desenption Parameter mg/kg Date Analyzed i 3667- '

7h/98 log bottom Oil & Grease 256.61 07/13/93

.c 7/2/98 Petroleum Hydro Total 252.54 07h3,98 1

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