WQ0036723_NOD-2019-PC-0047_20190214

ROY COOPER
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IMICHAEL S. R£CAN
Secretary
LINDA CULPEPPER
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Certified Mail # 7015 1520 0002 8386 8646
Return Receipt Requested
Allison Kraft, Director Public Utilities
Town of Mooresville
PO Box 878
Mooresville, NC 28115-0878
SUBJECT: NOTICE OF DEFICIENCY
NORTH CAROUN'A
Environmental Quaffty
February 14, 2019
Tracking Number: NOD-2019-PC-0047
Permit No. WQ0036723
Town of Mooresville DCAR
Iredell County
Dear Permittee:
The North Carolina Division of Water Resources conducted an inspection of the Town of Mooresville DCAR on
February 13, 2019. This inspection was conducted to verify that the facility is operating in compliance with the
conditions and limitations specified in Non -discharge Permit No. WQ0036723. A summary of the findings and
comments noted during the inspection are provided in the enclosed copy of the inspection report.
The Annual Report Review inspection was conducted by Division of Water Resources staff from the Mooresville
Regional Office. The following deficiency(s) was noted during the inspection:
Inspection Area
Description of Deficiency
Monitoring and Reporting requirements. Analytical data incorrectly reported in the Annual Report
In addition, the issues below must also be addressed:
Compliance Issues: Plant Available Nitrogen (PAN) and Sodium Absorption Ration (SAR) are
presented incorrectly / inconsistently in the 2018 Annual Report per permit condition, Section IV
Monitoring and Reporting Requirements, items (3) and (7).
NortNCaro Gna Depart mentof Env:ronrner._ -Duality I Divsonof Water Resoum es
Mooresv-17eReg*m-Office 1 610 EaACerierAvenue, 5u:teW1I MooresvihE,North 03roiina2S115

Calculations for PAN and SAR are supposed to be completed by the laboratory or WWTP staff and presented with
the appropriate equations showing the correct population of analytically derived data into the equations. SAR
calculations were correct when presented, but they were not consistently presented for all samples.
PAN values were not correctly calculated and the presented PAN values were two orders of magnitude too high
because the final step of the calculations was not completed. A copy of the spreadsheet to assist in calculating
both PAN and SAR will be sent to the CC's on this letter to aid them in understanding and presenting this data
properly. Please feel free to contact our office should you or your staff have any questions about utilization of this
tool or to better understand analytical results that your contracted lab may submit. In addition, please be aware
that NC State offers training on land application each spring and this may be useful for WWTP staff.
Remedial actions should have already been taken to correct this problem and prevent further occurrences in the
future. The Division of Water Resources may pursue enforcement action for this and any additional violations of
State law. To prevent further action, carefully review these deficiencies and address the causes of
non-compliance to prevent the recurrence of similar situations.
If you should have any questions, please do not hesitate to contact Edward Watson with the Water Quality
Regional Operations Section in the Mooresville Regional Office at 704-663-1699.
Sincerely,
EA
DocuSigned by:
4,01 w H N44,t
for
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W. Corey Basinger, Regional Supervisor
Water Quality Regional Operations Section
Mooresville Regional Office
Division of Water Resources, NCDEQ
ATTACHMENT: Annual Report Compliance Inspection Report
Cc: Non -Discharge Compliance/Enforcement Unit (Laserfiche)
Jamie Levis (via email)
Matthew Herman (via email)
North CaroGnaDepartmentofErmronrnents!Quality I Div -son of Water Resoumes
Nooresv-17eReg*m-Office1610Ea2l CeDler Avenue, Saae3011WcoresvihE,North Dirohrha2S115