NC0003433_Monitoring (Report)_20200928

��ENG Y,
September 28, 2020
NC Division of Water Quality
Water Quality Section
ATTENTION: Vanessa Manuel
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: 15A NCAC 213.0506
Duke Energy Progress Carolinas — Cape Fear Plant
NPDES No. NC0003433
Discharge Monitoring Report (DMR)
Dear Ms. Manuel:
Cape Fear Sleam Electric Plant
500 CP&L Road
Moncure NC 27559
NC Dept of Environmental Quality
OCT - 7 2020
R,00911 Regional Office
C//lATv*A00 G�
Attached is a letter from our lab vendor to address issues with the Cape Fear August 2020 DMR.
Instream mercury samples were taken on August 14t ` 2020. The sample results for 008 Upstream and
009 Downstream have been left blank due to analytical laboratory running the analysis (PACE
Laboratory) providing.notification.that its lab experienced cross -contamination with the mercury
sample. PACE is working to correct this issue. Duke Energy will also use another laboratory going
forward until we have assurance the cross -contamination issue is resolved. A copy of the letter will be
uploaded to the NPDES Wastewater eDMR Supplemental information Upload page and a copy will be
mailed to the address above.
Please contact Joyce Dishmon at [phone], if there are any questions concerning the data in this
submittal.
1 certify, under penalty of taw, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel property gather and evaluate the
informadon submitted. Based on my inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the Information submitted Is, to Me best of my knowledge and
belief, true, accurate, and complete. 1 am aware that there are significant penalties for submitting false information,
including the possibility of fines and Imprisonment for knowing violations
Sincerely,
Issa J. Tarzar
General Manager— East Region
CCP Operations and Maintenance
Enclosures

11�aceAnalytical
r
I
September 17, 2020
Duke Energy
3932 New Hill Holleman Rd,, New Hill, NC 27562
Dear Richard Smith,
NC Dept vFfinvironmental Quality
r 2020
kalcig[i Rcglanal Office
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 Cape Fear facility samples listed below. The issue was traced to sample cross -contamination in
the sample storage location.
Cane Fear
Proiect ID
Lab Sample ID
Customer Sample ID
Collection
Result
Unit
.Field Blanks
CFR_INST
92491032001
CFR_INST_DN_1_INST_2020_089
8/14/2020
2.97
ng/L
CFR INST
92491032003
CFR_INST_UP i INST_2020_091
8/14/2020
3.86
ng/L
CFR INST
92491032002
CFR_INST_DN_1_INST_2020_090
8/14/2020
1
NO
I
ng/L
X
CFR INST
1 92491032004
CFR_INST_UP_IINST_2020_092
8/14/2020
NO
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.
• 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,
(01 828-417-6052
Barry.lohnson@pacelabs corn
9800 Kincey Avenue, Suite 100, Huntersville, NC 28078
PACELABS.COM

aceAnalyilcal"
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,
6" � -
j ,..,.-
Barry Johnson
Sr. Quality Assurance Manager
101 82B-417-6052
Barry [e-mail]
9800 Kincey Avenue, Suite 100, Huntersville, NC 28078
PACELABS.CQM