WQCS00013_NOV-2023-DV-0063_Response Rvcd_20230307

March 2, 2023
Mr. Scott Vinson
Regional Supervisor
NCDEQ— Water Quality Regional Operations Section
Raleigh Regional Office
1628 Mail Service Center
Raleigh, NC 27699-1628
UTILITIES DEPARTMENT
NC Dept of Environmental
Quality
Raleigh g@vional
Office
CERTIFIED MAIL
Subject: Notice of Violation (NOV-2023-DV-0063) Remedial Actions
Dear Mr. Vinson:
On February 17, 2023, the Town of Cary Utilities Department receiv(
letter dated February 10, 2023, from the North Carolina Departm(
Division of Water Resources — Raleigh Regional Office for a sanita
occurred on January 13, 2023. The NOV letter required a written
days from receipt of the letter with steps taken to abate the 550 vic
civil penalty issuance.
a Notice of Violation (NOV)
of Environmental Quality,
sewer overflow (SSO) that
soonse within 15 business
ion and in consideration of
The Town appreciates the opportunity to provide the following additional information and
remedial actions performed because of the following SSO incident and includes actions to prevent
future occurrences.
Location
Incident #
Date
Total Volume
Tc
itaI
Action
Spilled (gal)
Volume to
Surface
Water
(gal)
Green Level Church
202300075
1/13/2023
34,251
D
NOV
Road, south of 408
Mills Park Drive
On January 13, 2023, the Town of Cary was notified by Cary staff at
#8, located at 408 Mills Park Drive/Green Level Church Road of w
along Green Level Church Road and across the access drive to
immediately responded to investigate the leak. Upon arrival staff is
Town of Cary Fire Station
coming from the ground
fire station. Cary staff
fled the water as a sewer
TOWN Of CARY
400 James Jackson Avenue • Cary, NC 27513 • PO Box 8005 • Cary, I C 27512-8005
te1919-469-4000 • fax [phone] • www.townofcarv.ot

leak on a 24-inch ductile iron force main that serves
both the Morris Branch Pump Station and Kit Creek
Pump Station. Based on onsite measurements and
consultation with the sewer spill estimation guidance
on NC DEQ's website, the leak was occurring at
approximately 15 gallons per minute. The sewer spill
traveled across the driveway access to the Cary Fire Figure i. SSO Interception
Station into a stormwater catch basin that led to a dry
storm water management pond/structure. Cary staff
immediately called on resources and dug a small a
receiving pit at the inlet to the dry storm water
management pond to collect the spilling wastewater
(Figure 1 and 2). A portable pump was installed to
pump the wastewater to a nearby gravity sewer
manhole. This proactive effortstopped the discharge Figure 2. SSO Pumlir
ng-dry stormwater BMP
from reaching the nearby tributary to Panther Creek.ewer All wastewater that collected was pumped back to the ssystem f disposal and treatment.
With timely planning and mutual ai agreements in place,
wastewater flow was diverted from the Morris Branch and Kit
Creek Pump Stations through existing pipeline connections to
the Durham County Triangle Wastewater Treatment Plant for
treatment while the pipeline was being repaired. Town of Cary
used stocked repair parts and utilize
Pipe to excavate and repair the force
two small holes ranging from approxii
Figure 3. Pipe holes quarters of an inch in diameter were i
the leak (Figure 3). Moffat Pipe replaced a 4-foot
to make a permanent repair. Approximately 180 feet of pipe upstre
leak was video inspected and showed very little to no corrosion.
Cross -sectional cuts of the pipeline showed very little to no wall
thickness loss on the pipe, indicating there is no widespread
corrosion or severe degradation of the pipe (Figure 4). The
pipeline repair was complete on January 20, 2023, and was video
assessed and monitored for any additional leaks. Cary
transferred more than 31 million gallons of wastewater at a cost
of $242,543 to Durham County for emergency wastewater !I
treatment support and spent $53,694 for the pipeline repair. This
portion of the force main is also in engineering review and a c
assigned for replacement or adding a parallel pipeline in the future.
the services of Moffat
nain. After excavation,
ately a quarter to three-
entified as the source of
.tion of ductile iron pipe
and downstream of the
4. Full half -inch pipe wall
improvement project

Cary's proactive measures in responding quickly and using our fl
allowed us to work with our neighboring utility and to prevent a spill f
We appreciate the opportunity to provide this additional information
to prevent future occurrences of sewer overflows at this location.
please feel free to contact me at [phone].
Sincerely,
Donald Smith
Wastewater Collection System Manager/ORC
Cc: Jamie Revels, P.E., Utilities Director
Matt Flynn, Public Works Director
Attachments: NCDEQ Notice of Violation — NOV-2023-DV-0063
Collection System SSO 5-day Report: Incident
ible utility infrastructure
n reaching surface water.
id remedial actions taken
there are any questions,

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Certified Mail # 7020 3160 0000 4115 5863
Return Receipt Requested
Jamie Revels, Director Utilities
Town of Cary
PO Box 8005
Cary, NC 27512-8005
SUBJECT: NOTICE OF VIOLATION
NORTH CAROLINA
Environmental Quality
February 10, 2023
Tracking Number: NOV-2023-DV-0063
Sanitary Sewer Overflows - January 2023
Collection System Permit No. WQCS00013
Cary Collection System
Wake County
Dear Mr. Revels:
NCDeptof6lroironmental Quality
MAR 7 2023
Raleigh Regio W of
ice
The self -reported Sanitary Sewer Overflow (SSO) 5-Day Report submitted by Town of Cary 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) DWRAction
202300075 1/13/2023 2,577
Green Level Church Pipe Failure (Break)
34,251
0 Notice of Violation
Road, south of 408
Mills Park Drive, Cary
NC 27519
NMhC mllm Depa mmtofF om WQu911ty I
R klghk&"Oflke 19800Bart DdNe I Rdel9h
919.MIA200
C N.2ybo9

Remedial actions, if not already implemented, should be taken to correct the ab ve
a written response to this Notice of Violation. Your response is to be received by the
business days following receipt of this violation. Please include any additional d u
in the response. The submittal will be considered in determining whether the ivisi
the cited violations.
If you have any questions, please do not hesitate to contact Mitchell Hayes
the Raleigh Regional Office at 919-791-4200 or via email at mitch.hayes@n
Laserfiche
Sincerely,
Scott Vinson, Regional Supervisor
Water Quality Regional Operations
Raleigh Regional Office
Division of Water Resources, NCDE
WT N
NatM1 CeMlru Department of Envlr9nmental Qually '
R IRM1 Re91o"Offke 13WO Ramen DAve I Rakph
9 9.i91.<300
noncompliance. Please submit
regional office within 15
mentation about this incident(s)
on will assess a civil penalty for
the Water Quality Section in
.gov.
Resources

State of North Carolina
Department of nvironment and Natural Resources
DWR copy Division of Water Resources
Collection System Sani ry Sewer Overflow Reporting Form
DIMsion of Water Resources Form CS-SSO
PART I:
This form shall be submitted to the appropriate DWQ Regional Office within five bush
sanitary sewer overflow (SSO).
Permit Number: WQCS00013 (WQCS# if active, otherwise use WQCSD#)
Facility: Cary Collection System
Owner: Town of Cary
City: Cary
County: Wake
Region:
Source of SSO (check applicable): [1 Sanitary Sewer ❑ Pump Station / Lift S
SPECIFIC location of the SSO (be consistent in description from past reports or documentE
Manhole at Westall & Bragg Street, etc): Green Level Church Road, south of 408 Mills Pai
Manhole #: N/A
Latitude (Decimal Degrees):
Longitude (Decimal
Incident Started Dt: 01/13/2023 Time: 11:03 am Incident End Dt: 01/1
(mm-dd-yyyy) (hh:mmAM/PM) (mm-1
Estimated Volume of the SSO: 34,251 gallons Estimated Duration (Round
Describe how the volume was determined: Calculated using Sewer Spill Estimation Guid
Weather conditions during the SSO event: Clear,
SSO reach surface waters?
Surface water name:
of the first knowledge of the
Incident #: 202300075
- i.e. Pump Station 6,
Time: 06:00 am
(hh:mm AM/PM)
nearest hour): 42:57 hours
ice - Gutter Flow Method and field
❑ Yes 0 No Unknown Volume reachi4 surface waters (gals):
Did the SSO result in a fish kill? Yes No 2 Unknown If Yes, what is the
SPECIFIC cause(s) of the SSO:
Q Pipe Failure (Break)
24 hour verbal notification (name of person contacted ): James Westcott
0 DWR Emergency Mgmt Date (mm-dd-yyy): 01/13/2023 Time
If an SSO is ongoing, please notify the appropriate Regional Office on a daily b:
Per G.S. 143-215.1C(b), the responsible party of a discharge of 1,000 or more of unti
shall issue a press release within 24-hours of first knowledge to all print and elects
coverage in the county where the discharge occurred. When 15,000 gallons or more of
waters, a public notice shall be published within 10 days and proof of publication shall
days. Refer to the reference statute for further detail.
Division unless it is demonstrated that:
number of fish killed?
AM/PM): 04:31:00 pm
until SSO can be stopped.
ad wastewater to surface waters
news media providing general
eated wastewater enters surface
irovided to the Division within 30
1) the discharge was cause by sever natural conditions and there were no feasible alternative to the discharge; or
2) the discharge was exceptional, unintentional, temporary and caused by factors beyond the reasonable control of the
Permittee and/or owner, and the discharge could not have been prevented by the exercise of reasonable control.
Part II must be completed to provide a justification claim for either of the above
This information will be the basis
CS-SSO Form
Page: 1

PART II:
ANSWER THE FOLLOWING QUESTIONS FOR EACH RELATED CAUSE CHECKED IN PART I OF THIS FORM AND
INCLUDE THE APPROPRIATE DOCUMENTATION AS REQUIRED OR DESIRED
COMPLETE ONLY THOSE SECTONS PERTAINING TO THE CAUSE OF THE SSO AS CHECKED IN PART I
(In the check boxes below, NA = Not Applicable and NE = Not Evaluated)
A HARDCOPY OF THIS FORM SHOULD BE SUBMITTED TO THE APPROPRIATE DWR REGIONAL OFFICE UNLESS IS
Pipe Failure (Break)
Pipe size (inches)
24
What is the pipe material?
Ductile Iron
What is the approximate age of lineipipe? (years old)
16
Is this a gravity line? Yes W No D NA D NE
Is this a force main line? [1 Yes ❑ No ❑ NA ❑ NE
Is the line a "High Priority" line? d Yes R No ❑ NA ONE
Last inspection date and findings
at the time of inspection in this area suggesting repair or rehabilitation.
If a force main then,
Was the break on the force main veritical? D Yes D No NA W NE
Was the break on the force main horizantal? d Yes ❑ No ❑ NA W NE
Was the leak at the joint due to gasket failure? D Yes ❑ No ❑ NA 0 NE
Was the leak at the joint due to split bell? EYes ❑ No DNA [ONE
When was the last inspection or test of the nearest air -release valve to determine of
operable?
December, 2020 following previous pipe leak repair
When was the last maintenace of the air release performed?
Julv 16. 2020
If gravity sewer then,
CS-SSO Form
Page: 2

boes the line receive flow from a force main immediately upstream of the failed secti, ❑ Yes 2 No NA ❑ NE
of pipe?
If yes, what measures are taken to control the hydrogen sulfide production?
Ferric Chloride solution is constantly used at upstream pump stations fc
When was the line last inspected or videoed?
If line collapsed, what is the condition of the line up and down stream of the failure?
Inspections are underway to inspect the pipeline and cause of leak.
What type of repair was made?
this time.
Is the repair temporary or permanent?
A permanent repair will be made
If temporary, when is the permanent repair planned?
Have there been other failures of this line in the past five years? [Z Yes ❑ No ❑ NA ❑ NE
If so, then describe
Within the last 5 years, a force main leak and repair occurred in December 2020. A pin hole leak developed in the ductile
Pipe approximately 1,000 feet upstream. A new section of Pipe was installed where the leak occurred.
System Visitation
ORC Yes
Backup Yes
Name:
Donald Smith
Cert#
1001030
Date visited:
1 /13/2023
Time visited:
4:15 PM
CS-SSO Form I Page: 3

Ho
As a
best
Pers
Sign
Tele
Any
kno
form
w was the SSO remediated (i.e. Stopped and cleaned up)?
Upon discoveryof the leak which occurred in the access drive area of a Ca Fire Station. staff responded immediatelytc
address and stopthe spill. The leak accumulated in a d stormwater retention and where staff installed a portable diesi
driven um and pumped the wastewater back into a gravitysewer line for disposal and treatment. The d stormwater c
and um installation prevented wastewater dischar a to surface waters. Ca utiliz d a mutual aid a reement with Durk-
Countyand the Triangle Wastewater Treatment Plant to redirect flow from two um tations and the force main.
Wastewater flow was completely removed from the force main leak and is beingtem oraril treated b Durham Count
while assessments and repairs are beingmade to the pipeline. Once flow was rerou ad it took some time for the force m;
to drain and the leak ands ill to stop. Once the leak was stopped Ca staff cleane u the s ill b washingdown the
roadwayand the surroundingarea of the spill with otable water. The potable water nd wastewater were pumped back
the sewers stem for disposal and treatment. The force main will remain drained an inactive to allow for pipeline
assessment and repair.
representative for the responsible party, I certify that the information contained in this report is true and accurate to the
of my knowledge.
on submitting claim: Donald Bradley Smith Da e: 01/18/23 10:30 am
ature:-�.o�X /J �--� Titl
phone Number: L460t''kotbS
addition information desired to be submitted should be sent to the appropriate Divisioi i Regional Office within five days of I
wledge of the SSO with reference to the incident number (the incident number is only 1 enerated when electronic entry of tF
is completed, if used).
ILI&
CS-SSO Form Page: 4
ILI&
CS-SSO Form Page: 4