NC0003417_Low level Hg results - lab cross contamination_20200929

Action History (UTC-05:00) Eastern Time (US & Canada)
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by Anonymous User 9/29/2020 2:30:26 PM (Supplemental Submittal)
by Bennett, Tilman B 5/16/2021 8:45:13 PM (Supplemental Info Submittal)
p Lab letter on low level Hg results - cross contamination of samples
• Bennett, Tilman B assigned the task to Bennett, Tilman B 5/16/2021 8:44 PM
• The task was assigned to Thedford, Wren, Bennett, Bradley 9/29/2020 2:30 PM

NPDES Wastewater EDMR Supplemental Information Upload
NORTH CAROLINA
ErtOrannllrtroi Quarry
Initial Review Information
Updated ID#:*
IM RtANfFEVIENERSHOULDVERIFY and revise here if necessary.
NC0003417
How should this project be handled?*
r File r Discard
Information Submitted on 9/29/2020
Submitter Information
Name: Jeffery D. Hines
VWio is subrritting the information?
Email Address:*
[e-mail]
Submittal Information
The Division of Water Resources (DWR) is providing this site to allow for the upload of required supplemental
information associated with discharge monitoring reports (DMR). All DMR data is required to be submitted
electronically through the eDMR system and should not be submitted here. Division staff will review all
uploaded documents and will only maintain required information. Documents such as laboratory reports are not required
to be submitted and will not be maintained in the system.
Project Information:
Rease supply the pernit nurrber for this project.
Existing ID#* FtxrritNull ter
NC0003417
Exarrples: NCxxxxxxx or NCGxxxxxx
Facility Name:*
Lee Steam Electric Plant
County: Wayne
Please upload all files that need to be
submited. *
Click the upload button or drag and drop files here to attach docurrent
Duke Energy LLHG Letter 091420 for Lee Combined
46.49KB
Cycle.pdf
Only pa files are accepted.
Comments about the attachments:
17 By checking the box and signing box below, I certify that:
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o Ilavc ylVCI I LI uC, al.l.ul dLC, aIlU l.ul1IF/ICLC IIIIUI IlldLlull ull LI IIJ IUI Ill,
o I agree that submission of this Supplemental Information form is a "transaction" subject to Chapter 66, Article 40 of the
NC General Statutes (the "Uniform Electronic Transactions Act")
o I agree to conduct this transaction by electronic means pursuant to Chapter 66, Article 40 of the NC General Statutes
(the "Uniform Electronic Transactions Act");
o I understand that an electronic signature has the same legal effect and can be enforced in the same way as a written
signature; AND
o I intend to electronically sign and submit the Supplemental Information form."
Full Name: Jeffery D. Hines
Signature:
Date Submitted: 09/29/2020

[O] 828 -417-6052
Barry.Johnson @pacelabs.com
9800 Kincey Avenue, Suite 100, Huntersville, NC 28078

PACELABS.COM

September 14, 2020
Duke Energy
3932 New Hill Holleman Rd., New Hill, NC 27562
Dear Richard Smith,

Pace Analytical Services, LLC is committed to providing high quality results and exemplary customer service to
our clients. Pace acknowledges the failure on our behalf to deliver accurate low-level mercury results for the
Duke Energy Lee Combined Cycle facility samples listed below. The issue was traced to sample cross-
contamination in the sample storage location.

Lee Combined Cycle
Project ID Lab Sample ID Customer Sample ID Collection Date Result Unit Field
Blanks
LCC_INST 92490924004 LCC_WC_UP_1_INST_2020_056 8/10/2020 10.7 ng/L X
LCC_INST 92490924001 LCC_WC_DN_1_INST_2020_053 8/10/2020 14.9 ng/L
LCC_INST 92490924002 LCC_WC_UP_1_INST_2020_055 8/10/2020 20.2 ng/L
LCC_INST 92490924003 LCC_WC_DN_1_INST_2020_054 8/10/2020 ND ng/L X

Sample collection, bottle kits, sample digestion, and sample analysis were all ruled out as the source of
contamination. A different Pace customer started a new low-level mercury project that started June 23, 2020.
There were non-Duke Energy samples stored with the Duke Energy samples that had mercury concentrations
as high as 18,000 ng/L.

Pace Analytical put in several corrective actions to help reduce the chance of sample cross contamination.
• Pace segregated non-Duke Energy samples from Duke Energy samples.
• We implemented a low-level mercury storage blank system to test for storage sample cross-
contamination issues.

[O] 828 -417-6052
Barry.Johnson @pacelabs.com
9800 Kincey Avenue, Suite 100, Huntersville, NC 28078

PACELABS.COM

• Bottle kits will now include a “trip blank” to travel with the samples from the collection point to the lab
and then will go through sample receiving to the storage location.

We apologize for any inconvenience or interruptions caused by this and appreciate the opportunity to support
your analytical needs.

Please do not hesitate to contact me or Kevin Herring if you have any questions or require additional
information.

Sincerely,
Barry Johnson
Sr. Quality Assurance Manager