ML101940279

Email from George Kuzo to Randy Musser, Heather Gepford, Richard Conaster, and Joseph Austin; CC: Brian Bonser Subject: FW: Cross Section.Pdf - Adobe Acrobat Professional Attachment: Cross Section.Pdf

ML101940279
Person / Time
Site:	Brunswick
Issue date:	11/14/2008
From:	Kuzo G NRC/RGN-II/DRS/PSB1
To:	Conatser R, Heather Gepford, Randy Musser Division of Inspection and Regional Support, NRC/RGN-II/DFFI, NRC/RGN-II/DRP/RPB4
References
FOIA/PA-2010-0209
Download: ML101940279 (2)

Text

Gepford, Heather From: George Kuzo Sent: Friday, November 14, 2008 8:10 AM To: Randy Musser; Heather Gepford; Richard Conatser; Joseph Austin Cc: Brian Bonser

Subject:

FW: cross section.pdf - Adobe Acrobat Professional Attachments: cross section.pdf During the November 13, 2008 BSEP telecon regarding status of Storm Drain Stabilization Pond (SDSP) H-3 monitoring/remediation activities and other onsite H-3 monitoring activities, intermediate depth well 19B which sampled immediately above the Castle Hayne aquifer, was identified as having elevated H-3 concentrations of H-3. Those elevated H-3 concentrations are outliers relative to tritium concentration results reported for other intermediate wells. The licensee stated that semi-permeable geological layers are less robust in this specific area beneath the pond and are believed to be a contributing factor to the observed elevated H-3 concentration results.

FYI as a follow-up, this is a schematic provided by the licensee regarding the underlying geological substrates and the location of the various aquifers in this area. We will continue to focus on the results for this intermediate well (19b) results as a potential problem which could lead to contamination of the intermediate aquifer.

From: Millinor, Mike [1]

Sent: Thursday, November 13, 2008 1:43 PM To: George Kuzo

Subject:

cross section.pdf - Adobe Acrobat Professional

A A' SE NW 4C 0 N1 3: N U) r j) U) 0)00 U)

U) Storm Drain Stabilization Pond wJ I, wd W 0 Surficial Sand Deposits (Quatemary) 0-Undifferentiated Pleistocene and Pliocene Deposits (Quatemary-Tertiary)

Castle Hayne Formation - -50 (Tertiary)

-100- - -100 Peedee Formation (Upper Cretaceous)

A ~-

-150- - -150 i

1000' 0 500' Sandy FillMaterial Shallow Surficial Aquifer Iw i Limestone (Castle Hayne Formation)

Wetlands Low Permeability Unit (Peedee Confining Unit) Intermediate Surficial Aquifer Z Upper Sand Unit I Lower Sand Unit Peedee Formation Progress Energy Brunswick Nuclear Plant Southport. NC Figure 3-4 Peedee Aquifer Low Permeability Unit (Unnamed) Cross Section A-A' Groundwater Flow Direction SIS-i Silar Services Inc.