WQ0003299_Notice of Violation_20240221 (2)

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-5- MOORESVILLE NC 28115-0878
J ATTN: RANDALL HEMANN,TOWN MGR.
dwr/jh 2/21/24

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O
ROY COOPER
Governor
ELIZABETH S.BISER ` j 7 `
"ten^
Secretary
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
Certified Mail # 7022 0410 0000 7789 5800
Return Receipt Requested
February 21, 2024
Randall W Hemann, Manager Town
Town of Mooresville
PO Box 878
Mooresville, NC 28115-0878
SUBJECT: NOTICE OF VIOLATION
Tracking Number: NOV-2024-DV-0127
Sanitary Sewer Overflows - January 2024
Collection System Permit No. WQCS00043
Mooresville Collection System
Iredell County
Dear Hemann:
The self-reported Sanitary Sewer Overflow (SSO) 5-Day Report submitted by Town of Mooresville indicates
violations of permit conditions stipulated in the subject permit and North Carolina G.S. 143-215.1. Violations include
failing to effectively manage, maintain, and operate the subject collection system so that there is no SSO to the
land or surface waters and making an outlet to waters of the State for purposes of G.S. 143-215.1(a)(1), for
which a permit is required.
Specific incident(s) cited in the subject report include the following:
Total Vol
Total Surface
Incident Start Duration Vol Water
Number Date (Mins) Location Cause (Gals) (Gals) DWR Action
202400131 1/9/2024 108 253 GOLF COURSE Severe Natural 10,800 10,800 Notice of Violation
DRIVE, MOORESVILLE, Condition Winter Storm 2024
NC, 28115
202400132 1/9/2024 87 169 KILBORNE ROAD, Inflow and Infiltration, 530 530 Notice of Violation
MOORESVILLE,NC, Severe Natural Winter Storm 2024
28117 Condition
North Carolina Department of Environmental Quality I Division of Water Resources
D_E Q Mooresville Regional Office 1610 Fast Center Avenue.Suite 301 1 Mooresville.North Carolina 2BI15
4'V 704.663.1b94

Total Vol
Total Surface
Incident Start Duration Vol Water
Number Date (Mins) Location Cause (Gals) (Gals) DWR Action
202400133 1/10/2024 38 130 ROCKHOPPER Power Outage 10,500 10,500 Notice of Violation
LANE, MOORESVILLE, Winter Storm 2024
NC,28115
202400314 1/13/2024 256 400 WEST PARK Pipe Failure(Break) 452 452 Notice of Violation
AVENUE,
MOORESVILLE,NC,
28115
Remedial actions, if not already implemented, should be taken to correct the above noncompliance. Please submit
a written response to this Notice of Violation. Your response is to be received by the regional office within 15
business days following receipt of this violation. Please include any additional documentation about this incident(s)
in the response. The submittal will be considered in determining whether the Division will assess a civil penalty for
the cited violations. Regarding the SSO's that occurred on January 9 & 10, 2024, and in keeping with the
Governor's Executive Order No. 300, which declared a statewide state of emergency for the Severe Weather Event
that occurred, the Division of Water Resources is utilizing its enforcement discretion and only issuing a Notice of
Violation for events that noted'Severe Natural Conditions'as contributing to SSO's on those dates. No Additional
response to the Division is necessary for events that occurred within those dates.
If you have any questions, please do not hesitate to contact Joanna Harbison with the Water Quality Regional
Operations Section in the Mooresville Regional Office at 704-663-1699 or via email at
[e-mail].
Sincerely,
DocuSigned by:
1,.41444v H Nut,
F161FB69A2084A3...
Andrew H. Pitner, P.G., Regional Supervisor
Water Quality Regional Operations Section
Mooresville Regional Office
Division of Water Resources, NCDEQ
Cc: Regional Office - WQS File/Laserfiche
Central Files, Water Quality Section
DECO North Carolina Department of Environmental Quality Divis on of Water Resources
Mooresville Regional Office 610 East Cmter Avmue.Son,301 I Moaresvilk.North Carolina 28115
t...r+=w\/'" 704.h83.1b99

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4, Town of Mooresville MAR m 4 2024
Post Office Box 878
Mooresville,North Carolina 28115 W( ?OS
*N / MOORESVILLE REGIONAL OFFICE
March 1, 2024
Subject: Response to Notice of Violation& Intent to Issue Civil Penalty
Tracking#: NOV-2024-DV-0127
Permit#: WQCS00043
System: Town of Mooresville Collection System
Dear Mr. Pitner,
An investigation was conducted of the Sanitary Sewer Overflows (SSO) listed below within the
wastewater collections system maintained and operated by the Town of Mooresville immediately
after the event occurred. The investigation revealed these to be isolated incidents that occurred
due to very heavy rains, flash flooding,and heavy winds following the storm. Further explanation
of this SSO is listed below including a discussion of remedial and corrective actions.
INCIDENT NUMBER AND ADDRESS:
Incident#202400131 which occurred on 01/09/2024 near 253 Golf Course Drive
Incident#202400132 which occurred on 01/09/2024 near 169 Kilborne Road
Incident#202400133 which occurred on 01/10/2024 near 130 Rockhopper Lane
Incident#202400314 which occurred on 01/13/2024 near 400 West Park Avenue
REMEDIATION EFFORTS:
On January 9, the Town of Mooresville experienced very heavy rains and flash flooding due to a
severe weather system that affected the entire Charlotte region.Local rain gauges indicate between
2.5-4 inches of rain fell during a 24-hour period. As a result, the Town had three discharges of
untreated wastewater directly related to the storm and one a few days later from heavy winds.
Incident#202400131-Reed Creek Pump Station
The flash flooding occurred at Reed Creek. Since Lake Norman was completely full, this creek
that leads to it, could not keep up resulting in a flash flood. The flooding covered a large portion
of the golf course and was all the way against the pump station building. All three pumps in the
building were pumping fine, it just could not keep up with the amount coming in.
Incident#202400132-Autumn Breeze Pump Station
This is a smaller station near Lake Norman. Higher than normal lake levels contributed to more
amounts of infiltration that overwhelmed the station. The pump crew called the vacuum truck to
start pumping and hauling but it spilled an estimated amount of 530 gallons between trips.

,z.00 Noores6�.
Town of Mooresville
,,. s, Post Office Box 878
J Mooresville,North Carolina 28115
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Incident#202400133-Northside Pump Station
Something happened to the power grid causing Duke Energy to drop a phase of power to the
station. The automatic transfer switch didn't like the anomaly resulting in it not operating.As soon
as technicians arrived,they quickly troubleshot the problem and manually transferred it, allowing
the generator to power the station,and the overflow ended.
Incident#202400314-400 West Park Avenue
Heavy winds and saturated ground caused a large oak tree to fall, landing across an aerial sewer
line.A staff member noticed it on his day off while driving and gathered a crew to make the repair.
Once they cut and removed the tree out of the way, they replaced the section of aerial sewer line
with temporary piers and bracing. Once the material was delivered, we constructed permanent
supports for the aerial.
COMMENTS:
The Town budgets $1,000,000 annually to sewer rehab which involves I&I studies and SSES to
eliminate sources of inflow and infiltration. These rehabs projects have shown to be effective as
we will continue them and I feel sure these would've been worse if we had not been doing so.
The Town of Mooresville will continue to make operational and system improvements to further
reduce and eliminate all SSOs within the system. If you have any questions regarding this
response,please contact either Allison Kraft or myself at 704-664-3705.
Sincerely,
Jamie Johnson
Water-Sewer Maintenance Superintendent
Town of Mooresville
ORC-WWC