WQCS00002_NOV-2020-DV-0194 Response_20200501

ROY COOPER
C-WrIxrx
MICHAEL S. REGAN
sermtury
S. DANIEL SMITH
plrrrtur
NORTI I CAROUNA
Environmental Quality
C-EBUFIED L: 7 I63-SfiO 0000442Q 6628
RETURN RECEIPT, REQUESTED
May 01, 2020
Robert Massengill, Director of Public Utilities
City of Raleigh
PO Sox 590
Raleigh, NC 27602
S
SUBJECT: NOTICE OF VIOLATION & INTENT TO ISSUE CIVIL PENALTY
Tracking No.: NOV-2020-DV-0194
Sanitary Sewer Overflows — January, February, March 2020
Collection System Permit No. WQCS00002
Raleigh Collection System
Wake County
Dear Mr. Massengill:
NC Dept Of Environmental Guailrt
Raleigh Regional 4ftic,
A review has been conducted of the self -reported Sanitary Sewer Overflows (SSO's) 5-Day Report/s submitted by
City of Raleigh. The Division's Raleigh Regional Office concludes that the City of Raleigh violated Permit Condition I
(2) of Permit No. WQCS00002 by failing to effectively manage, maintain, and operate their collection system so
that there is no SSO (Sanitary Sewer Overflow) to the land or surface waters and the SSO constituted making an
outlet to waters of the State for purposes of G.S. 143-215.1(a)(1), for which a permit is required by G.S.
143-215.1.
The Raleigh Regional Office is providing the City of Raleigh an opportunity to provide evidence and justification as
to why the City of Raleigh should not be assessed a civil penalty for the violation(s) that are summarized below:
Total Vol
Total Surface
Incident Start Duration Vol Water
Number Date (Mina) Location Cause (Gals) (Gals) DWR Action
202000027 1/5/2020 148 1200 Manchester Dr. Roots
Raleigh
3,000 3,000 Notice of Violation -
Notice of Intent
202000092 1/14/2020 160 108 Russell Park Ct. Other, Pipe Failure 1,200 1,000 Notice of Violation
(Break)
202000128 1/21/2020 210 7408 Grist Mill Rd. Grease 4,180 3,180 Nodce of Violation -
Raleigh Notice of Intent
202000151 1/25/2020 180 11 Blakeford Rd. Debris
2,700 2,700 Notice of Violation -
Notice of Intent
-1 NO Car* ntDipinwantoErwnrrrtnu'nit ;} I Dat:e.zt star A#rcr;ai

Total Vol
Total
Surface
Incident
Number
Start
Date
Duration
(Mies)
Location
Cause
Vol
(Gals)
Water
(Gals)
DWR Action
202000199
1/29/2020
80
905 Seventh Ave.
Grease, Roots
3,400
2,400
Violationof
NotiNotice of Intent
Gamer
202000212
2/1/2020
24
1900 Varnell Ave,
Debris in line, Roots
240
240
Notice of Deficiency
Raleigh, NC
202000226
2/3/2020
79
4029 Deep Hollow Drive Debris In line
3,950
3,950
Notice n
Noticeof Intent
202000240
2/3/2020
216
2019 Park Falls Drive,
Debris in line, Roots
2,160
2,160
Notice of Violation -
Raleigh
Notice of Intent
202000518
2/7/2020
327
529 S. Wilmington 5t.
Other, Pipe Failure
3,300
Notice of Violation
(Break)
202000614
2/10/2020
116
5208 North Hills Dr.
Grease
3,132
1,000
Notice of Violation
Raleigh
202000703
2/14/2020
125
5606 Forest Oaks Drive
Grease
3,125
3,125
Notice
Notice of Intent
202000758
2/22/2020 .
228
800 Orleans Place
Debris in line, Grease
3,420
3,420
Notice of Intention —
202000759
2/22/2020
150
Manhole SMH 125639
Debris in line
3,000
3,000
ice of V
Notice of Inlatiion —
Notnt
202000796
2/24/2020
163
2816 Oberlin Road
Oth&
1,725
1,725
Notice of Violation
202000829
2/28/2020
72
intersection of Pinecross Grease
1,338
1,238
Notice of Violation
and sweet briar drive
202000895
3/7/2020
207
3820 William Bullock Ct. Roots
2,150
2;150
Notice of on
of Intent
202000994
3/12/2020
81
817 McMakin St. Raleigh Grease
1,215
1,215
Notice of Violation
202001058
3/22/2020
135
44 E. }fester Ct.
Vandalism
2,300
2,300
Notice of Violation -
Wendell
Notice of Intent
This Notice of Violation / Notice of Intent to Enforce (NOV/NOI) is being issued for the noted violation. Pursuant
to G.S. 143-215.6A, a civil penalty of not more than twenty-five thousand dollars ($25,000.00) may be assessed
against any person who violates or fails to act in accordance with the terms, conditions, or requirements. of any
permit issued pursuant to G.S. 143-215.1.
This office requests that you respond to this Notice, in writing, within 60 business days of its
receipt. In your response, you should address the causes of non-compliance, remedial actions, and all other
actions taken to prevent the recurrence of similar situations. The response to this correspondence will be
considered In this process. Enforcement decisions will also be based on volume spilled, volume reaching surface
waters, duration and gravity, impacts to public health, fish kills or recreational area closures. Other factors
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considered in determining the amount of the civil penalty are the violator's history of non-compliance, the cost of
rectifying the damage, whether the spill was intentional and whether money was saved by non-compliance.
If you have any questions, please do not hesitate to contact Mitchell Hayes with the Water Quality Section in
the Raleigh Regional Office at 919-791-4200 or via email at [e-mail].
Sincerely,
Scott Vinson, Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ
Cc: Raleigh Regional Office - WQS File
Laserfiche
Email copy to Carlos Perez [e-mail]
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Raleigh Water
July 111, 2020
Mr. Scott Vinson
Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources NCDEQ
1628 Mail Service Center
Raleigh, NC 27699-1628
Re: Response to NOV-2020-DV-0194
Sanitary Sewer Overflows - January, February, March 2020
Permit No. WQCS00002
Dear Mr. Vinson:
JUL -91010
fib 8Et!!'t"lSS+ fhgbnel Oda'
Please allow this letter to serve as a response to the Notice of Violation & Intent to Issue Civil
Penalty document (NOV-2020-DV-0194) received on May 81h, 2020. This document contains narratives
regarding pending violation actions of (17) Sanitary Sewer Overflows (SSO) events, which occurred
during the first quarter of the 2020 calendar year within the City of Raleigh Collections System 111. The
noticed events occurred while the City operated its collection system, according to WQCS00002, dated
June 6th, 2017. The permit includes the language outlined in footnote 1 and applies to the SSOs upon
which NOVs with the notice of intent (NOV-NOI) were based. This document will establish a reasonable
explanation of the actions taken to stop the spill; contain the released wastewater; collect the
wastewater and reintroducing it to the collection system; and finally, restoring the possible
environmental impacts brought by the release of the SSO events, listed with the intended NOV-N01
action. Please find below, the additional information requested for each of the SSO events.
I. "The Director may take enforcement action against the Permittee for SSOs that must be reported to the Division as stipulated in Cocditlgn IV92). This Includes
5SOs that were caused by severe natural conditions or exceptional events unless the Permittee demonstrates through properly signed, contemporaneous operating
logs, or other relevant evidence that:
Ia.) The 550 was caused by severe natural conditions; there were no feasible alternatives to the SSO, such as the use of auxiliary treatment facilities, retention
of untreated wastewater, reduction of inflow and infiltration, use of adequate back-up equipment, or an Increase in the capacity of the system. This prove si �n I.
not satisfied if, In the exercise of reasonable engineering judgment, the Permittee should have Installed auxiliary or additional collections system compo-e-ts,
wastewater retention or treatment facilities, adequate back-up equipment or should have reduced inflow and Infiltration; or
jb] The SSO was exceptional, unintentional, temporary and caused by factors beyond the reasonable control of the Permittee; the 550 could not have been
prevented by the exercise of reasonable control, such as proper management, operation, and maintenance; adequate treatment or collection facilities or
components (e.g., adequately enlarging treatment of collection facilities to accommodate growth or adequately controlling and preventing Infiltration and
Inflow), preventative maintenance; or installation of adequate back-up equipment;"
Pace 1 of 39

Incident Number # 202000027—1/5/2020 —1200 Manchester Dr., Raleigh
This spill was neither willful nor intentional, it was the result of root intrusion, which blocked a
portion of a 10-in" Vitrified Clay Pipe (VCP). The root intrusion led to a sewer spill of approximately
3,000 gallons of untreated wastewater reaching surface waters through an unnamed tributary in Mine
Creek Basin.
' On 1/5/2020, at approximately 6:02 PM, Sewer Maintenance staff was notified of a sewer back-
up behind the residence at 1200 Manchester Dr., Raleigh. Upon arrival, it was discovered that untreated
sewer was emanating from an adjacent manhole (SMH104853). The responding staff took all reasonable
steps to stop and mitigate the impact of the discharge as soon as they arrived, gaining control of the spill
event by 8:30 PM on the same day. Crews utilized hydraulic jetting to remove the source of the blockage
within the affecting asset thus restoring sewer flow
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary sewer containment site downstream from the 5SO location to stop the flow of sewer into the
stream. Crews used pumps at the temporary containment site, to recover the remaining sewer back into
a downstream sewer manhole. During the restoration phase of the operation, crews utilized water from
adjacent hydrants to defuse and flush the affected area. The area around the manhole was cleared of
debris, treated with an application of lime, and restored with grass seed and straw.
This spill was contained without a significant environmental impact to the adjacent area and its
natural resources. Visual inspection of the affected area and downstream waters confirmed that no fish
kill, or unnecessary vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $4,069.65.
The approximate cost to the Utility to have treated 3,000 gallons of wastewater would have been
approximately $4.15. The City saved no money from this spill. its costs for cleanup exceeded the cost of
treating the volume of sewage had no spill occurred. Furthermore, the City still had to pay the cost to
treat the greater volume of sewage created by the spill.
This section of the collection system provides sewer services to over 180 properties west of Six
Forks Rd., Raleigh. Before this incident, there have been no other sewer spills associated with root
intrusion in this area. A press release notification associated with this event was published in the Raleigh
News & Observer on Monday, January 6th, 2020.
Before this event, maintenance records show that sections of this collection system were
assessed as follows:
Flushing activities
CCTV activities
Inspection activities
06/09/2004
02/07/2011
7 sewer assets located within the
05/19/2008
02/09/2011
sanitary sewer easement were
08/11/2010
08/29/2017
inspected between 12/31/2019 and
01/12/2014
01/23/2018
01/08/2020
04/17/2014
Page 2 of 39

The latest maintenance / inspection assessment for this site was conducted on 06/11/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. This assessment was conducted using flow monitors to verify flow velocity
equalization on the downstream and upstream manhole in order to determined potential blockages that
may reduce sewer flow. There have been no additional issues associated with this section of the
collection system since the last sewer event. This site has been added to the Hot Spot Management
Program for debris management with a recommended maintenance interval of every 30 days.
Pans 3 of R4

Incident Number # 202000092—1/14/2020 — 208 Russell Park Ct., Garner
This spill was neither willful nor intentional, it was the result of an inadequately installed
overflow pipe, causing the attached air release valve to fail. This asset failure led to a sewer spill of
approximately 1,000 gallons of untreated wastewater which reached surface waters within Marks Upper
Basin.
On 01/14/2020, at approximately 9:00 AM, Sewer Maintenance staff was notified of a sewer spill
emanating from the ground, near the curb at 108 Russell Park Ct., Garner. Upon arrival, it was
determined that a section of pipe that serves to control sewer overflow from the air release valve (ARV)
was inadequately installed, resulting in sand and grit collecting the air release valve causing a
malfunction. The responding staff took all reasonable steps to stop and mitigate the impact of the
discharge as soon as they arrived, gaining control of the spill event by 11:20 AM on the same day.
Containment, collection, cleanup, restoration, and repair of this spill event consisted of
employing a vacuum truck to minimize the flow of untreated water downstream and isolating the site
for the repair to be completed. Sewer repair crews, in coordination with pump station mechanics,
installed a new ARV successfully connecting its overflow pipe to the adjacent force main. The flow was
restored shortly after.
This spill was contained without a significant environmental impact to the adjacent area and its
natural resources. Visual inspection of the affected area and downstream waters confirmed that no fish
kill, or unnecessary vegetative damage occurred.
Crews utilized ample water, during the restoration phase of the operation, to flush the
surrounding affected area. Weather conditions during this event were overcast with rain, which helped
further defuse nearby surface waters. The release of the untreated wastewater was relatively clear, with
no observed traces of sewer debris. The site of the sewer run-off was treated with an application of lime
and restored with grass seed and straw.
The cost associated with the mitigation of this event amounted to $1,992.90. The approximate
cost to the Utility to have treated 1,200 gallons of wastewater would have been approximately $1.80.
The City saved no money from this spill. Its costs for cleanup and repair exceeded the cost of treating
the volume of sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the
greater volume of sewage created by the spill.
The failed air release valve was installed in a new housing development area under construction.
Investigation of the event conducted by Raleigh Water Code enforcement was not able to determine
contractor negligence. There were no records of mechanical issues with the device prior to this event.
The events leading to this spill can be considered exceptional, unintentional, temporary, and
caused by factors beyond our reasonable control. Furthermore, the SSO could not have been prevented
by the exercise of reasonable control, such as routine operations and maintenance, adequate treatment
facilities, or collection system facilities or components. This event occurred in an active residential
construction zone where heavy equipment and associated construction activities may have caused the
spill. A press release notification related to this event was requested to be published in the Raleigh News
& Observer on 1/14/2020. There have been no further sewer events associated with this location.
Page 4 of 39

Incident Number # 202000128-1/21/2020 - 7408 Grist Mill Rd., Raleigh
This spill was neither willful nor intentional, it was the result of a grease build-up, restricting the
sewer flow within a section of 8-inch sewer gravity main. This build-up led to a sewer spill of
approximately 4,180 gallons of untreated wastewater of which about 3,180 gallons reached surface
waters through an unnamed tributary within the Perry Basin.
On 01/21/2020, at approximately 11:27 AM, Sewer Maintenance staff was notified of a sewer
spill emanating from an adjacent manhole at 7408 Grist Mill Rd Raleigh. The responding staff took all
reasonable steps to stop and mitigate the impact of the discharge as soon as they arrived, gaining
control of the spill event by 2:57 PM on the same day. Crews utilized hydraulic jetting to remove the
source of the blockage within the affecting asset, thus restoring sewer flow.
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary spill containment site downstream of the affected area. This approach was intended to
contain the flow of sewer and minimize the environmental impact to the surrounding land. This spill was
contained without a significant environmental impact to the adjacent area and its natural resources.
Visual inspection of the affected area and downstream waters confirmed that no fish kill, or unnecessary
vegetative damage occurred.
During the restoration phase of the operation, crews utilized ample potable water to flush the
affected area and to remove traces of sewer from the creek. Crews employed pumps at the temporary
containment site, to recover flushed wastewater and any evidence of sewer back into a downstream
sewer manhole. The areas around the manhole were cleared of debris, treated with an application of
lime, and restored with grass seed and straw.
The cost associated with the mitigation of this event amounted to $5,393.53. The approximate
cost to the Utility to have treated 4,180 gallons of wastewater would have been approximately $6.27.
The City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of
sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume
of sewage created by the spill.
This section of the collection system serves a residential area East of Fall of Neuse lid., providing
sewer collection to over 100 properties. The last recorded sewer spill associated with this section of the
sanitary sewer collection system occurred on 01/12/2009.
A press release notification associated with this event was requested to be published in the
Raleigh News & Observer on 1/22/2020 8:52 AM. Outreach information was delivered on 01/23/2020.
Two hundred twenty-five educational letters were mailed, and 15 door hangers, were hand -delivered to
property owners upstream of the SSO. This outreach literature explains the need for customers to use
the sanitary sewer collection system properly. It also serves as an opportunity for citizens to partner
with Public Utilities to protect the City's water quality and the sewer collection infrastructure.

Prior to this event, maintenance records show that sections of this collection system were
assessed as follows:
Flushing activities
10/20/2002
08/25/2003
08/20/4004
10/21/2004
01/30/2007
02/02/2007
12/04/2008
01/18/2009
01/17/2010
01/18/2010
08/20/2010
08/29/2011
10/18/2011
01/26/2012
07/21/2015
Repair
CCTV activities
Inspection activities
activities
12/01/2009
04/30/2007
09/04/2007
02/03/2012
09/08/2011
01/12/2009
07/30/2013
70 sewer assets located within
08/12/2013
the sanitary sewer easement
05/14/2014
were inspected between
06/19/2014
11/30/2017 and 1/28/2020.
06/20/2014
Additional CCTV assessment was performed to sections of this system to assess the state of the
pipe and determine if any other conditions are present that may lead to a future spill.
01/27/2020 - CCTV found roots and broken pipe on the sewer main requiring repair and root
removal.
• 02/5/2020 - Repair of the affected pipe was completed. Repair crews believe further root
intrusion downstream is possible —created CCTV work order to investigate.
03/16/2020 - CCTV inspection reveals possible root intrusion downstream. Created work order
to remove roots.
The latest maintenance / inspection assessment for this site was conducted on 06/11/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe has a slight variation which may require additional maintenance assessment. A follow up work
order has been scheduled. This assessment was conducted using flow monitors to verify flow velocity
equalization on the downstream and upstream manhole in order to determined potential blockages that
may reduce sewer flow. There have been no additional issues associated with this section of the
collection system since the last sewer event. This site has been added to the Hot Spot Management
Program for debris management with a recommended Maintenance interval of every 30 days.
Page 6 of 39

Incident Number # 202000151 - 1/25/2020 -11 Blakeford Dr, Wendell
This spill was neither willful nor intentional, it was the result of debris accumulation, restricting
sewer flow within a section of an 8-inch PVC sewer gravity main. This build-up led to a sewer spill of
approximately 2,700 gallons of untreated wastewater reaching surface waters through a stormwater
channel in Little S. Basin.
On 01/25/2020, at approximately 8:22 AM, Sewer Maintenance staff was notified of a sewer spill
emanating from an adjacent manhole (SMH108808) located at the dead-end of Blakeford DR., Wendell.
The responding staff took all reasonable steps to stop and mitigate the impact of the discharge as soon
as they arrived, gaining control of the spill event by 11:22 AM on the same day. Crews utilized hydraulic
jetting to remove the source of the blockage within the affecting asset, thus restoring sewer flow. Crews
successfully removed foreign debris such as sticks, several rocks, rags, and a lateral plug from the
affected manhole. A camera inspection of the affecting asset found no structural issues that could have
caused the blockage.
Containment, collection, cleanup, and restoration of this spill event consisted of employing two
temporary spill containment sites downstream of the affected area. This approach was intended to
contain the flow of sewer and minimize the environmental impact to the surrounding land. An
additional survey showed no solids anywhere in the affected area, wastewater was contained within the
open stormwater channel and did not reach the unnamed tributary of the Neuse River that it connects
to. This spill was contained without a significant environmental impact to the adjacent area and its
natural resources. Visual inspection of the affected area and downstream waters confirmed that no fish
kill, or unnecessary vegetative damage occurred.
During the restoration phase of the operation, crews utilized ample potable water to flush the
affected area and to remove traces of sewer from the creek. Crews employed pumps at the temporary
containment site, to recover flushed wastewater and any traces of sewer back into a downstream sewer
manhole. The area around the manhole was cleared of debris, treated with an application of lime, and
restored with grass seed and straw.
The cost associated with the mitigation of this event amounted to $ $1,815.15. The approximate
cost to the Utility to have treated 2,700 gallons of wastewater would have been approximately $4.05.
The City saved no money from this spill. its costs for cleanup exceeded the cost of treating the volume of
sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume
of sewage created by the spill.
This section of the collection system serves a residential area east of Wendell Blvd, providing
sewer collection to over 100 properties. There has been no recorded sewer spill associated with this
section of the sanitary sewer collection system before or after this event.
A press release notification associated with this event was requested to be published in the
Raleigh News & Observer on 1/25/2020 8:52 AM. Outreach information was delivered on 01/28/2020 to
approximately 57 properties within the affected area. This outreach literature explains the need for
customers to use the sanitary sewer collection system properly. It also serves as an opportunity for
citizens to partner with Public Utilities to protect the City's water quality and the sewer collection
infrastructure.

Before this event, maintenance records show that parts of this collection system were assessed
as follows:
Flushing activities
01/18/2017
01/26/2017
01/26/2017
01/26/2017
02/14/2018
04/11/2018
12/04/2018
03/26/2019
04/03/2019
05/08/2019
01/14/2020
01/26/2020
02/18/2020
03/01/2020
Repair activities
CCTV activities
Inspection activities
02/16/2016
01/25/2020
20 sewer assets located
04/11/2018
08/10/2017
within the sanitary
05/30/2019
02/19/2020
sewer easement were
05/01/2019
04/08/2019
inspected between
04/30/2019
05/16/2019
2/19/2019 and
08/19/2019
07/26/2019
3/27/2020
02/16/2018
The latest maintenance / inspection assessment for this site was conducted on 06/11/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. This assessment was conducted using flow monitors to verify flow velocity
equalization on the downstream and upstream manhole in order to determined potential blockages that
may reduce sewer flow. There have been no additional issues associated with this section of the
collection system since the last sewer event. This site has been added to the Hot Spot Management
Program for debris management with a recommended Maintenance interval of every 90 days.
Pee 8 of 39

Incident Number # 202000199-1/29/x020- 905 Seventh Ave., Garner
This spill was neither willful nor intentional, it was the direct result of a grease build-up,
restricting the sewer flow within a section of 8-inch sewer gravity main. This build-up led to a sewer spill
of approximately 3,400 gallons of untreated wastewater. About 2,480 gallons reached surface waters
through Reedy Branch Blue Line Stream within the Benson Basin.
On 01/29/2020, at approximately 11:45 AM, Sewer Maintenance staff was notified of a sewer
spill emanating from a sewer manhole (SMH126672) located behind the Westchester Apartment
complex, 905 Seventh Ave, Garner. This overflow was discovered by a staff member conducting a high
priority easement inspection. The staff member immediately notified the responding staff, who took all
reasonable steps to stop and mitigate the impact of the discharge as soon as responding crews arrived,
gaining control of the spill event by 1:05 PM on the same day. Crews utilized hydraulic jetting to remove
the source of the blockage within the affecting asset, thus restoring sewer flow. A follow-up CCTV
assessment on 01/29/2020 identified that the root cause of this event was related to root intrusion,
which contributed to the grease accumulation_ The affected gravity sewer main was consequently hydro
jetted with a mechanical root cutter.
Containment, collection, cleanup, and restoration of this spill event consisted of employing two
separate temporary spill containment sites downstream of the affected area. This approach was
intended to contain the flow of sewer and minimize the environmental impact to the surrounding
land. This spill was contained without a significant environmental impact to the adjacent area and its
natural resources. Visual inspection of the affected area and downstream waters confirmed that no fish
kill, or unnecessary vegetative damage occurred.
During the restoration phase of the operation, crews utilized ample potable water to flush the
affected area and to remove traces of sewer from the creek. Crews employed pumps at the temporary
containment site, to recover flushed wastewater and any traces of sewer back into a downstream sewer
manhole. The areas around the manhole were cleared of debris, treated with an application of lime, and
restored with grass seed and straw.
The cost associated with the mitigation of this event amounted to $8,153.52. The approximate
cost to the Utility to have treated 4,180 gallons of wastewater would have been approximately $5.10.
The City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of
sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume
of sewage created by the spill.
This section of the collection system serves a residential area east of Vandora Springs Rd.,
Garner. This system provides sewer collection to both single-family and multi -dwelling properties. The
last recorded sewer spill associated with this section of the sanitary sewer collection system occurred on
1/8/2008. No other sewer spills have occurred since.
A press release notification associated with this event was requested to be published in the
Raleigh News & Observer on 1/30/2020. Outreach information was delivered on 02/05/2020 to 229
residents within the affected area. This outreach literature explains the need for customers to use the
sanitary sewer collection system properly. It also serves as an opportunity for citizens to partner with
Public Utilities to protect the City's water quality and the sewer collection infrastructure.

Prior to this event, maintenance records show that sections of this collection system were
assessed as follows:
Flushing
activities
01/13/2001
11/21/2003
07/03/2001
12/16/2003
07/31/2001
03/09/2004
08/23/2001
10/25/2004
01/08/2002
04/18/2005
01/16/2002
07/27/2005
01/22/2002
01/03/2006
01/29/2002
11/13/2006
02/06/2002
03/03/2007
06/12/2002
08/07/2007
08/05/2002
10/04/2007
08/08/2002
10/25/2007
10/14/2002
10/31/2007
11/14/2002
02/15/2008
12/03/2002
07/12/2008
01/22/2003
10/09/2008
04/17/2003
07/16/2010
06/17/2003
01/28/2011
07/09/2003
12/05/2017
09/30/2003
01/30/2020
Easement maintenance activities CCTV activities
11/30/2001 1/30/2020
06/12/2002
07/31/2002
06/30/2005
The latest maintenance / inspection assessment for this site was conducted on 06/08/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. This assessment was conducted using flow monitors to verify flow velocity
equalization on the downstream and upstream manhole in order to determined potential blockages that
may reduce sewer flow. There have been no additional issues associated with this section of the
collection system since the last sewer event. This site has been added to the Hot Spot Management
Program for debris management with a recommended Maintenance interval of every 90 days.
Page 10 of 39

Incident Number # 202000212 - 2/01/2020-1900 Varnell Ave., Raleigh
This spill was neither willful nor intentional, it was the result of construction debris and grease
build-up, restricting the sewer flow within a section of 8-inch sewer gravity main. This build-up led to a
sewer spill of approximately 240 gallons of untreated wastewater, reaching an unnamed tributary within
Crabtree Creek.
On Saturday, February 1, 2020, at approximately 8:12 AM, Sewer Maintenance staff was notified
of a sewer spill emanating from a sewer manhole located in the vicinity of 1900 Varnell Ave., Raleigh.
The overflow was witnessed by a concerned citizen who confirmed that the overflow lasted for only a
few minutes and stopped at approximately 8:36 AM the same day. Staff arrived onsite at 8:50 AM,
confirming that the event had stopped. There was evidence on the pavement that an overflow had
occurred, crews utilized hydraulic jetting to ensure that no further blockages would occur.
A follow-up CCTV assessment on 02/03/2020 identified that the root cause of this event was
related to construction debris caught on roots. The affected gravity sewer main was consequently hydra
jetted with a mechanical root cutter and all debris removed from the collection system.
It was determined that the wastewater had poured into an adjacent stormwater catch basin,
reaching an unnamed tributary. The affected area was minimized by a deep pocket in the creek, which
prevented wastewater from continuing to travel downstream. Containment measures were set in place
using hay bales across the creek and emplacing a 4-in pump to recover flushed wastewater and any
traces of sewer back into a downstream sewer manhole. The street was washed with ample water to
flush traces of wastewater towards the collection site. Operations remained in effect until all waste that
was discharged was collected. This spill was contained without a significant environmental impact to the
adjacent area and its natural resources. Visual inspection of the affected area and downstream waters
confirmed that no fish kill, or unnecessary vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $ $761.90
The approximate cost to the Utility to have treated 240 gallons of wastewater would have been
approximately $0.36. The City saved no money from this spill. Its costs for cleanup exceeded the cost of
treating the volume of sewage had no spill occurred. Furthermore, the City still had to pay the cost to
treat the greater volume of sewage created by the spill.
This section of the collection system serves a residential area west of Glenwood Ave., providing
sewer collection services to over 576 properties. The last recorded sewer spill associated with this
section of the sanitary sewer collection system occurred on 01/23/2019 as the result of contractor
damage. Two previous recordable SSO events occurred on 09/4/2014 (3700 Dade 5t) as the result of
paper debris; and 05/05/2006 (3616 Dade St.) as the result of root intrusion. No other sewer spills have
occurred since the event on 2/01/2020.
t i F -

Maintenance records show that sections of this collection system were assessed as follows:
Flushing activities
05/05/2006
06/07/2010
05/17/2006
04/03/2011
05/30/2006
05/09/2011
11/09/2007
06/01/2011
02/22/2008
11/15-19/2013
03/06/2008
12/23/2013
03/07/2008
01/10/2014
03/17/2008
01/15/2014
03/25/2008
02/18/2014
04/01/2008
09/04/2014
09/21/2009
09/11/2015
CCTV activities
Inspection activities
0/16/2003
10/25/2005
04/09/2014
03/07/2008
01/13/2015
12/23/2013
09/11-17/2015
09/1S/2015
09/16/2015
09/17/2015
Easement 12 sewer assets located within the
maintenance sanitary sewer easement were
activities inspected between 2/15/2018 and
05/30/2006 2/5/2020
09/17/2015
Repair
activities
10/20/2015
A previous stormwater project on the street was determined to be where the construction
debris originated. The latest maintenance / inspection assessment for this site was conducted on
06/04/2020. Visual inspection of the upstream and downstream manholes determined that sewer flow
within the pipe is consistent. This assessment was conducted using flow monitors to verify flow velocity
equalization on the downstream and upstream manhole in order to determined potential blockages that
may reduce sewer flow. There have been no additional issues associated with this section of the
collection system since the last sewer event. This site has been added to the Hot Spot Management
Program for debris management with a recommended Maintenance interval of every 90 days.
Page 12 of 39

Incident Number # 202000226 - 2/3/2020 - 4029 Deep Hollow Drive, Raleigh
This spill was neither willful nor intentional, it was the result of an accumulation of paper
products blocking a portion of an 8" vitrified clay sewer main (VCP). This buildup led to a sewer spill of
approximately 3,650 gallons of sewer that reached surface waters through an unnamed tributary of
Crabtree Creek basin.
On Monday, February 3, 2020, at approximately 12:41 PM, Sewer Maintenance staff was notified
of a sewer spill emanating from a sewer manhole (SMH116600) located 4029 Deep Hollow Drive,
Raleigh. This overflow was discovered by a staff member as a routine check on hot spots. The staff
member immediately notified the responding staff, who took all reasonable steps to stop and mitigate
the impact of the discharge as soon as responding crews arrived, gaining control of the spill event by
2:00 PM on the same day. Crews utilized hydraulic jetting to remove the source of the blockage within
the affecting asset, thus restoring normal sewer flow.
Containment, collection, cleanup, and restoration of this spill event consisted of employing two
separate temporary spill containment sites downstream of the affected area. This approach was
intended to contain the flow of sewer and minimize the environmental impact to the surrounding
land. This spill was contained without a significant environmental impact to the adjacent area and its
natural resources. Visual inspection of the affected area and downstream waters confirmed that no fish
kill, or unnecessary vegetative damage occurred.
During the restoration phase of the operation, crews utilized ample potable water to flush the
affected area and to remove traces of sewer from the creek. Crews employed pumps at the temporary
containment site, to recover flushed wastewater and any traces of sewer back into a downstream sewer
manhole. The areas around the manhole were cleared of debris, treated with an application of lime, and
restored with grass seed and straw.
The cost associated with the mitigation of this event amounted to $ 6,798.75. The approximate
cost to the Utility to have treated 3,650 gallons of wastewater would have been approximately $5.47.
The City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of
sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume
of sewage created by the spill.
This area serves a large apartment complex with a history of spills associated with debris and
grease accumulation. Before February 3, the most recent incident occurred on 9/15/19 (incident #
201901533), where 13,400 gallons of untreated wastewater was lost. This SSO was also caused by a
buildup of flushed wipes just as the event on February 3. This site has been identified as a frequent site
for continued assessment. A recent visual assessment of the collection system determined that the
spilled manhole (SMH116600) requires a drop manhole to be installed. This installation would decrease
damage to the invert from a flow 6-ft above. This repair would ease continued sewer flow downstream
as well a minimize the possibility of a spill reoccurrence.
A press release notification associated with this event was requested to be published in the
Raleigh News & Observer on Monday, February 3, 2020.Outreach information was delivered and mailed
to the residents upstream of the affected area. There were 213 letters and 201 door hangers delivered.
This outreach literature explains the need for customers to use the sanitary sewer collection system
properly. It also serves as an opportunity for citizens to partner with Public Utilities to protect the City's

water quality and the sewer collection infrastructure. Samples of these letters are included with this
letter
Prior to this event, maintenance records show that sections of this collection system were
assessed as follows:
Flushing
activities
10/22/2010
11/02/2010
02/16/2017
01/5/2011
02/14/2017
03/7/2011
01/30/2018
03/25/2011
09/14/2018
03/10/2012
10/24/2018
04/4/2012
05/03/2019
04/18/2012
05/09/2019
09/25/2012
08/01/2019
10/04/2012
08/02/2019
10/11/2012
10/11/2019
10/15/2012
09/17/2019
10/20/2012
10/29/2019
03/07/2013
01/15/2019
04/30/2013
09/20/2019
08/15/2013
03/12/2020
09/18/2014
02/11/2020
08/06/2015
05/27/2020
CCTV activities
10/15/2018
09/19/2019
09/20/2019
09/23/2019
10/31/2019
Repair activities
11/14/2019
10/07/2019
01/15/2020
06/01/2020
Easement
maintenance
activities
10/31/2001
06/14/2017
10/19/2017
11/13/2017
01/29/2018
Inspection activities
07/15/2019
04/16/2020
44 sewer assets located within the
sanitary sewer easement were
inspected between
7/15/2019 and 4/16/2020
The latest maintenance / inspection assessment for this site was conducted on 06/22/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. This assessment was conducted using flow monitors to verify flow velocity
equalization on the downstream and upstream manhole in order to determined potential blockages that
may reduce sewer flow. Repair of identified asset was conducted 06/05/2020. This site has been added
to the hot Spot Management Program for debris management with a recommended Maintenance
interval of every 14 days.
Paee 14 of 39

Incident Number ## 202000240 - 2/3/2020 - 2019 Park Falls Drive, Raleigh
This spill was neither willful nor intentional, it was the result of root intrusion, which blocked a
portion of an 8-in" Polyvinyl Chloride Pipe (PCP). The root intrusion led to a sewer spill of approximately
2,160 gallons of untreated wastewater reaching surface waters through an unnamed tributary in Neuse
Basin.
On Monday, February 3rd, 2020, at approximately 8:25 AM, Sewer Maintenance staff was
notified of a sewer back-up behind the residence at 2019 Park Falls Drive, Raleigh. Upon arrival, it was
discovered that untreated sewer was emanating from an adjacent manhole (SMH101838). The
responding staff took all reasonable steps to stop and mitigate the impact of the discharge as soon as
they arrived, gaining control of the spill event by 8:42 AM on the same day. Crews utilized hydraulic
jetting to remove the source of the blockage within the affecting asset, thus restoring sewer flow. crews
found and removed a pair of wire cutters that may have contributed to the spill. The sewer main was
televised, identifying root intrusion through a crevice approximately 56ft upstream from the manhole
located on Wide River Dr. (SMH123344). Further high -velocity cleaning was used to remove the
remaining root ball. A work order has been generated to correct the deficient pipe.
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary sewer containment site downstream from the SSO location with the intent to stop the flow
of sewer into the stream. Crews employed pumps at the temporary containment site, to recover the
remaining sewer back into a downstream sewer manhole. During the restoration phase of the
operation, crews utilized water from adjacent hydrants to defuse and flush the affected area. The area
around the manhole was cleared of debris, treated with an application of lime, and restored with grass
seed and straw. This spill was contained without a significant environmental impact to the adjacent area
and its natural resources. Visual inspection of the affected area and downstream waters confirmed that
no fish kill, or unnecessary vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $941.55.
The approximate cost to the Utility to have treated 2,160 gallons of wastewater would have been
approximately $3.24. The City saved no money from this spill. Its costs for cleanup exceeded the cost of
treating the volume of sewage had no spill occurred. Furthermore, the City still had to pay the cost to
treat the greater volume of sewage created by the spill.
This section of the collection system provides sewer services to over 180 properties west of Six
Forks Rd., Raleigh. Maintenance records show a minimal history of collection system issues. Before this
incident, there have been no other sewer spills associated with root intrusion in this area.
A press release notification associated with this event was published in the Raleigh News &
Observer on Monday, January 6th,2020. Outreach information was mailed to 292 residents upstream of
the affected area. This outreach literature explains the need for customers to use the sanitary sewer
collection system properly. It also serves as an opportunity for citizens to partner with Public Utilities to
protect the City's water quality and the sewer collection infrastructure.

Prior to this event, maintenance records show that sections of this collection system were
assessed as follows:
CCTV Repair
Easement
Inspection
Flushing
activities activities
maintenance
activities
activities
activities
09/19/2014 02/05/2020 04/12/2017
06/21/2019
03/27/2018
02/03/2020
10/24/2019
01/16/2020
23 sewer assets located
within the sanitary sewer
easement were
inspected between
03/27/2018 and
01/16/2020
The latest maintenance / inspection assessment for this site was conducted on 06/4/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. This assessment was conducted using flow monitors to verify flow velocity
equalization on the downstream and upstream manhole in order to determined potential blockages that
may reduce sewer flow. There have been no additional issues associated with this section of the
collection system since the last sewer event. This site has been added to the Hot Spot Management
Program for debris management with a recommended maintenance interval of every 90 days.
Page 16 of 39

Incident Number # 202000518 - 2/7/2020 - 529 S. Wilmington St., Raleigh
This spill was neither willful nor intentional, it was the direct result of a contractor damaging a
12-inch sewer gravity main. This pipe damage led to a sewer spill of approximately 3,300 gallons of
untreated sewage, remaining within a stormwater system.
On 02/07/2020, at approximately 4:03 PM, Sewer Maintenance staff was notified of a sewer spill
emanating from the ground of a parking lot and a manhole, at 529 S. Wilmington St., Raleigh. The
responding staff took all reasonable steps to stop and mitigate the impact of the discharge as soon as
they arrived, gaining control of the spill event by 9:30 PM on the same day. Crews utilized hydraulic
jetting to dislodge the source of the blockage and provide partial flow.
Containment, collection, cleanup, repair, and restoration of this spill event consisted of
recovering approximately 4,500 gallons of sewer and water used to flush the affected area from a catch
basin downstream of the spill event. The wastewater remained within the stormwater system, not
reaching surface waters of the state. The site of the sewer run-off was washed utilizing ample water to
remove traces of sewer. Sewer debris and solids were collected and disposed of accordingly. Repair
crews replaced approximately 15 ft of damaged pipe restoring the pipe to normal sewer flow. This spill
was contained without a significant environmental impact to the adjacent area and its natural resources.
Visual inspection of the affected area and downstream waters confirmed that no fish kill, or unnecessary
vegetative damage occurred.
The cost associated with the mitigation of this event, to include repair and enforcement costs,
amounted to $11,898.14. The approximate cost to the Utility to have treated 3,300 gallons of
wastewater would have been approximately $4.95. The City saved no money from this spill. Its costs for
cleanup exceeded the cost of treating the volume of sewage had no spill occurred. Furthermore, the City
still had to pay the cost to treat the greater volume of sewage created by the spill.
Since this event, maintenance records do not show any previous history of spills associated with
this location or current sewer infrastructure failures.
■}-.i 4 T -i P7^

Before this event, maintenance records indicate that sections of this collection system were
assessed as follows:
11/2-6/2001
08/20/2001
08/21/2001
08/23/2001
10/31/2001
04/21/2002
06/10/2004
10/13/2004
08/26/2005
01/08/2006
06/27/2008
08/08/2008
08/10/2008
Flushing activities
01/05/2009
02/2S/2009
03/12/2009
03/16/2009
03/25/2009
07/17/2009
12/21/2009
12/22/2009
05/31/2010
08/24/2010
02/17/2011
01/20/2012
02/14/2012
02/22/2012
05/31/2012
06/10/2012
02/06/2013
02/07/2013
06/28/2013
08/07/2013
10/01/2013
01/06/2014
12/02/2014
02/03/2015
06/10/2015
08/16/2015
CCTV activities
06/10/2012
02/22/2012
03/29/2005
03/17/2009
03/24/2009
10/13/2008
11/06/2014
03/14/2005
Repair activities
05/04/2004
05/14/2004
06/03/2004
06/10/2004
10/09/2004
06/10/2012
inspection activities
02/06/2004
08/27/2001
05/07/2012
04/19/2014
01/09/2014
05/13/2015
08/01/2012
Raleigh Water Code Enforcement has issued an NOV to the affecting contractor. The events
leading to this spill can be considered exceptional, unintentional, temporary, and caused by factors
beyond our reasonable control. Furthermore, the SSO could not have been prevented by the exercise of
reasonable control, such as routine operations and maintenance, adequate treatment facilities, or
collection system facilities or components. A press release notification associated with this event was
requested to be published in the Raleigh News & Observer on Monday, Saturday, February 8, 2020.
The latest maintenance / CCTV inspection for this site was conducted on 02/28/2020. Visual
inspection of the upstream and downstream manholes determined that sewer flow within the pipe is
consistent. Repair of identified asset was conducted 02/09/2020. CCTV verification on 02/26/2020,
determined that no further action was required.
Page 18 of 39

Incident Number # 202000614 - 2/10/2020 - 5208 North Hills Dr., Raleigh
This spill was neither willful nor intentional, it was the result of a grease build-up, restricting the
sewer flow within a section of 10-inch Vitrified Clay (VCP) sewer gravity main. This build-up led to a
sewer spill of approximately 3,132 gallons of untreated wastewater in which about 1,000 gallons
reached surface waters through Reedy Branch Blue Line Stream within the Mine Basin.
On 2/10/20, at approximately 9:19 AM, Sewer Maintenance staff was notified of a sewer spill
emanating from a sewer manhole (SMH118828) located near 5208 North Hills Dr., Raleigh. The
responding staff took all reasonable steps to stop and mitigate the impact of the discharge as soon as
they arrived, gaining control of the spill event by 11:15 AM on the same day. Crews utilized hydraulic
jetting to remove the source of the blockage within the affecting asset, thus restoring sewer flow.
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary spill containment site downstream of the affected area. This approach was intended to
contain the flow of sewer and minimize the environmental impact on surrounding surface waters.
During the restoration phase of the operation, crews utilized ample potable water to flush the
affected area and to remove traces of sewer from the creek. Crews employed pumps at the temporary
containment site, to recover flushed wastewater and any evidence of sewer back into a downstream
sewer manhole. The areas around the manhole were cleared of debris, treated with an application of
lime, and restored with grass seed and straw. This spill was contained without a significant
environmental impact to the adjacent area and its natural resources. Visual inspection of the affected
area and downstream waters confirmed that no fish kill, or unnecessary vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $2,362.32. The approximate cost to
the Utility to have treated 4,180 gallons of wastewater would have been approximately $4.70. The City
saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of sewage
had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume of
sewage created by the spill.
A follow-up CCTV assessment conducted on 02/26/2020 identified that the root cause of this
event was related to root intrusion, which contributed to the grease accumulation. The affected gravity
sewer main was consequently hydro jetted with a mechanical root cutter on 02/27/2020.
This section of the collection system serves a residential area west of Six Forks Rd., Raleigh. This
system provides sewer collection to approximately 275 properties. The last recorded sewer spill
associated with this section of the sanitary sewer collection system occurred on 04/25/2017.
A press release notification associated with this event was requested to be published in the
Raleigh News & Observer on 02/10/2020. Outreach information was also delivered on 02/13/2020 to
237 residents within the affected area. This outreach literature explains the need for customers to use
the sanitary sewer collection system properly. It also serves as an opportunity for citizens to partner
with Public Utilities to protect the City's water quality and the sewer collection infrastructure.
n- - *n ..cnn

Prior to this event, maintenance records for the last ten years show that sections of this
collection system were assessed as follows:
Flushing activities
CCTV activities
Inspection activities
02/15/2010
03/1/2017
04/20/2009
26 sewer assets located
02/18/2010
03/16/2017
06/04/2012
within the sanitary sewer
09/7-9/2010
03/25/2018
8/12/2012
easement were inspected
02/16/2011
09/10/2018
08/19/2013
between 11/6/2017 and
03/01/2011
09/11/2019
08/26/2013
1/15/2020
03/11/2011
12/27/2019
11/25/2015
04/11/2011
01/21/2020
07/18/2014
6/2-3/2012
12/27/2019
07/09/2013
Repair activities
06/02/2012
02/7/2020
02/1/2017
6/3/2012
06/03/2012
01/15/2020
02/13/2017
04/25/2017
06/06/2012
01/14/2020
08/28/2019
05/22/2018
08/12/2012
01/2/2020
08/19/2019
07/17/2018
01/18/2013
02/7/2020
12/30/2019
06/26/2019
07/05/2013
01/10/2020
02/26/2020
09/19/2019
07/09/2013
01/15/2020
08/21/2013
01/14/2020
Easement maintenance activities
11/06/2013
01/3/2020
03/22-27/2002
01/24/2018
04/05/2014
02/7/2020
03/20/2002
01/25/2018
04/06/2014
01/3/2020
04/21/2004
01/25/2018
04/25/2014
01/31/2020
04/23/2008
01/26/2018
10/17/2014
02/7/2020
05/8/2017
01/29/2018
10/22/2014
01/14/2020
10/2/2017
02/7/2018
10/24/2014
02/7/2020
01/10/2018
07/31/2018
11/24/2015
02/27/2020
01/12/2018
08/21/2018
11/25/2015
02/10/2020
01/22/2018
01/24/2019
02/17/2017
01/31/2020
01/22/2018
01/28/2019
02/13/2017
01/23/2018
01/30/2019
01/23/2018
01/30/2019
01/24/2018
01/30/2019
01/25/2018
02/8/2019
01/24/2018
03/7/2020
03/8/2020
The latest maintenance / inspection assessment for this site was conducted on 06/12/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. This assessment was conducted using flow monitors to verify flow velocity
equalization on the downstream and upstream manhole in order to determined potential blockages that
may reduce sewer flow. on 06/19/2020 the sewer main was flushed again. There have been no
additional issues associated with this section of the collection system since the last sewer event. This
site has been added to the Hot Spot Management Program for debris management with a
recommended maintenance interval of every 90 days.
Page 20 of 39

Incident Number # 202000703- 2/14/2020 - 5606 Forest Oaks Dr., Raleigh
This spill was neither willful nor intentional, it was the result of a grease build-up, restricting the
sewer flow within a section of an 8-inch sewer gravity main. This build-up led to a sewer spill of
approximately 3,125 gallons of untreated wastewater reaching surface waters through an unnamed
tributary in Marsh Basin.
On 2/14/20, at approximately 4:27 PM, Sewer Maintenance staff was notified of a sewer spill
emanating from a private sewer cleanout located within 5606 Forest Oaks Dr., Raleigh. The responding
staff took all reasonable steps to stop and mitigate the impact of the discharge as soon as they arrived,
gaining control of the spill event by 6:32 PM on the same day. Crews utilized hydraulic jetting to remove
the source of the blockage within the affecting asset, thus restoring sewer flow.
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary spill containment site downstream of the affected area. This approach was intended to
contain the flow of sewer and minimize the environmental impact on surrounding surface waters.
During the restoration phase of the operation, crews utilized ample potable water from an
adjacent hydrant to flush the affected area and to remove traces of sewer from the creek. Crews
employed a 4 in diesel pump at the temporary containment site, to recover flushed wastewater and any
evidence of sewer back into a downstream sewer manhole. The areas around the manhole were cleared
of debris, treated with an application of lime, and restored with grass seed and straw. This spill was
contained without a significant environmental impact to the adjacent area and its natural resources.
Visual inspection of the affected area and downstream waters confirmed that no fish kill, or unnecessary
vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $4,267. The approximate cost
to the Utility to have treated 3,125 gallons of wastewater would have been approximately $4.68. The
City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of
sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume
of sewage created by the spill.
A follow-up CCTV assessment conducted on 02/15/2020 identified that the root cause of this
event was related to root intrusion, which contributed to the grease accumulation. Consequently,
approximately 2000 ft of sewer main, downstream of the spill event, were hydro jetted on 02/18/2020.
This section of the collection system serves a residential area west of Atlantic Ave., Raleigh. This
system provides sewer collection to approximately 23 properties; most of them been multi -dwelling
properties. The last recorded sewer spill associated with this section of the sanitary sewer collection
system occurred on 10/10/2010 as the result of root intrusion.
n-, , IV4 -t 'Y^

Prior to this event, maintenance records for the last ten years show that sections of this
collection system were assessed as follows:
Flushing activities
1/9/2002
10/3/2008
1/10/2002
8/1/2009
9/16/2003
8/2/2009
12/2/2003
10/10/2010
5/30/2006
4/3/2012
1/25/2007
4/4/2012
1/26/2007
9/15/2012
2/8/2008
7/1/2014
2/11/2008
7/2/2014
7/14/2014
CCTV activities
Inspection activities
3/8/2008
Inspection records show that high
9/22/2010
priority inspection was conducted
on:
11/21/2001
1/9/2002
1/10/2002
7/1/2014
Easement
23 sewer assets located within the
Assessment
sanitary sewer easement were
inspected between 2/8/2018 and
8/6/2012
2/25/2020
7/2/2014
A press release notification associated with this event was requested to be published in the
Raleigh News & Observer on 02/15/2020. Outreach information was also delivered on 02/18/2020 to
approximately 98 properties and management offices of the following apartment complexes within the
affected area as follows:
1. Cedar Springs Apartments
2. Turtle Cove Apartments
3. North Oak Lansing
4. Pecan Towns
5. River Birds
This outreach literature explains the need for customers to use the sanitary sewer collection
System properly. It also serves as an opportunity for citizens to partner with Public Utilities to protect
the City's water quality and the sewer collection infrastructure.
The latest maintenance / inspection assessment for this site was conducted on 06/12/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is inconsistent therefore requiring further assessment. A follow up work order for further cleaning
is scheduled. There have been no additional issues associated with this section of the collection system
since the last sewer event. This site has been added to the Hot Spot Management Program for debris
management with a recommended maintenance interval of every 90 days.
Nee 22 of 39

Incident Number # 202000758- 2/14/2020 - 800 Orleans PI., Raleigh
This spill was neither willful nor intentional, it was the result of a grease build-up, restricting the sewer
flow within a section of an 8-Inch Ductile Iron Pipe sewer gravity main. This build-up led to a sewer spill
of approximately 3,420 gallons of untreated wastewater reaching surface waters through an open
stormwater channel discharging directly into Big Branch creek. A small depression on the land was able
to contain sewer solids from continuing to enter the creek.
On Saturday, February 22, 2020, at approximately 9:37 AM, Sewer Maintenance staff was
notified of a sewer spill emanating from a manhole located near 800 Orleans PI., Raleigh. The
responding staff took all reasonable steps to stop and mitigate the impact of the discharge as soon as
they arrived, gaining control of the spill event by 1:25 PM on the same day. Crews utilized hydraulic
jetting to remove the source of the blockage within the affecting asset, thus restoring sewer flow.
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary spill containment site downstream of the affected area. This approach was intended to
contain the flow of sewer and minimize the environmental impact to surrounding surface waters.
During the restoration phase of the operation, crews utilized approximately 45,000 gallons of
potable water from an adjacent hydrant to flush the affected area and to remove traces of sewer from
the creek. Crews employed a pump at the temporary containment site, to recover flushed wastewater
and any evidence of sewer back into a downstream sewer manhole. The areas around the manhole
were cleared of debris, treated with an application of lime, and restored with grass seed and straw.
This spill was contained without a significant environmental impact to the adjacent area and its
natural resources. Visual inspection of the affected area and downstream waters confirmed that no fish
kill, or unnecessary vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $1,312.76. The approximate
cost to the Utility to have treated 3,420 gallons of wastewater would have been approximately
$5.13. The City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the
volume of sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the
greater volume of sewage created by the spill.
A follow-up CCTV assessment (conducted on 02/22/2020) found no structural issues with
approximately 197 ft. of sewer gravity main. This CCTV assessment determined that the asset has been
cleaned of grease during the flushing for this event.
This section of the collection system serves a residential area in the vicinity of Indian Trail Dr. and
Quail Hollow Dr. in Raleigh. This system provides sewer collection to approximately 51 properties.
Maintenance records do not show any previous history of spills associated with this location.
A press release notification associated with this event was requested to be published in the
Raleigh News & Observer on 02/22/2020. Outreach information was also delivered on 02/24/2020 to
approximately ten properties upstream of the affected area. This outreach literature explains the need
for customers to use the sanitary sewer collection system properly. It also serves as an opportunity for

citizens to partner with Public Utilities to protect the City's water quality and the sewer collection
infrastructure.
Prior to this event, maintenance records for the last ten years show that sections of this
collection system were assessed as follows:
Flushing activities
CCTV activities
Inspection activities
7/9/2003 5/16/2007
4/17/2007
M M/D D/YYYY
4/12/2007 9/21/2007
5/17/2007
4/26/2007
4/26/2007 3/10/2010
9/26/2007
5/16/2007
5/5/2012
10/10/2007
10/24/2007
5/21/12
10/11/2007
11/22/2010
4/19/2014
26 sewer assets located within the
Easement
sanitary sewer easement were
Assessment
inspected between 11/4/2019 and
11/14/2019
9/25/2003
07/29/2018
The latest maintenance / inspection assessment for this site was conducted on 06/12/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. There have been no additional issues associated with this section of the collection
system since the last sewer event. This site has been added to the Hot Spot Management Program for
debris management with a recommended maintenance interval of every 90 days.
Pave 24 of 39

Incident Number # 202000759- 2/22/2020 - Manhole SMH 125639 (1101 Lupine Ct., Raleigh)
This spill was neither willful nor intentional, it was the result of debris accumulation, restricting
sewer flow within a section of an 8-inch sewer gravity main. This build-up led to a sewer spill of
approximately 3,000 gallons of untreated wastewater reaching surface waters through a stormwater
channel in Walnut Basin.
On 2/22/2020, at approximately 10:20 AM, Sewer Maintenance staff was notified of a sewer spill
emanating from a manhole (SMH125639) located east of 1101 Lupine Ct., Raleigh. The responding staff
took all reasonable steps to stop and mitigate the impact of the discharge as soon as they arrived,
gaining control of the spill event by 12:50 PM on the same day. Crews utilized hydraulic jetting to
remove the source of the blockage within the affecting asset, thus restoring sewer flow. Crews
successfully removed foreign debris.
Containment, collection, cleanup, and restoration of this spill event consisted of employing two
temporary spill containment sites downstream of the affected area. This approach was intended to
contain the flow of sewer and minimize the environmental impact to the surrounding land.
During the restoration phase of the operation, crews utilized ample potable water to flush the
affected area and to remove traces of sewer from the lake's shore lines. Crews employed pumps at the
temporary containment site, to recover flushed wastewater and any traces of sewer back into a
downstream sewer manhole. The area around the manhole was cleared of debris, treated with an
application of lime, and restored with grass seed and straw. This spill was contained without a significant
environmental impact to the adjacent area and its natural resources. Visual inspection of the affected
area and downstream waters confirmed that no fish kill, or unnecessary vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $ $654.56. The approximate
cost to the Utility to have treated 3,000 gallons of wastewater would have been approximately $4.50.
The City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of
sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume
of sewage created by the spill.
This section of the collection system serves a multi -dwelling residential area east of Jones
Franklin Rd. There has been no recorded sewer spill associated with this section of the sanitary sewer
collection system before or after this event. On 03/04/2020 CCTV assessed approximately 604 ft of
sanitary sewer downstream of the affected manhole. This assessment identified that the root cause of
this event was related to root intrusion on a segment of main downstream. A press release notification
associated with this event was requested to be published in the Raleigh flews & Observer on 2/22/2020.

Before this event, maintenance records show that parts of this collection system were assessed
as follows:
Flushing activities
6/26/2003
1/6/2011
8/28/2003
5/8/2013
6/29/2007
6/18/2014
10/14/2009
6/18/2014
10/15/2009
9/3/2014
1/4/2011
7/7/2015
CCTV activities Inspection activities
03/04/2020 4/1/2011
7/6/2015
7/6/2015
69 sewer assets located within the
sanitary sewer easement were inspected
between 3/8/2018 and 2/19/2020
The latest maintenance / inspection assessment for this site was conducted on 06/12/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. There have been no additional issues associated with this section of the collection
system since the last sewer event. This site has been added to the Hot Spot Management Program for
debris management with a recommended maintenance interval of every 30 days.
Paee 26 of 39

Incident Number # 202000759- 2/22/2020 — 2816 Oberlin Rd., Raleigh)
This spill was neither willful nor intentional, it was the direct result of contractor damage to a
sewer service line that discharges into a 6-inch gravity sewer main. This damage led to a sewer spill of
approximately 1,775 gallons of untreated wastewater reaching Beaverdam Creek within Beaver South
West Basin.
On 02/24/2020, at approximately 11:30 AM, Sewer Maintenance staff was notified of a sewer spill
emanating from a manhole, downstream of 2816 Oberlin Rd., Raleigh. Upon arrival, it was discovered
that the spill was the direct result of a telecommunications contractor boring through a 2-inch water
service line and a private 4-inch sewer service lateral. The tunnel left by the bore -through served as a
channel for potable water from the water service line to flow into the sewer service lateral discharging
directly into the 6-inch gravity sewer main downstream. The flow transported an ample amount of
sediment and debris downstream through the sewer main, creating a blockage leading to the spill.
Although the primary source of the spill was treated water (from the bored through water service line),
the responding staff took all reasonable steps to stop and mitigate the impact of the discharge as soon
as they arrived, gaining control of the spill event by 2:13 PM on the same day.
Containment, collection, cleanup, restoration, and repair of this spill event consisted of employing a
vacuum truck to minimize the flow of untreated water downstream and isolating the site for the repair
to be completed. Sewer Repair crews, in conjunction with Water Distribution Repair crews, were able to
repair both service lines, successfully restoring flow to both water and sewer services.
Crews utilized ample water, during the restoration phase of the operation, to flush the surrounding
affected area. The sewer flow was relatively clear, with no observed traces of sewer debris. The site of
the sewer run-off downstream was treated with an application of lime and restored accordingly. This
spill was contained without a significant environmental impact to the adjacent area and its natural
resources. Visual inspection of the affected area and downstream waters confirmed that no fish kill, or
unnecessary vegetative damage occurred.
A press release notification related to this event was requested to be published in the Raleigh
News & Observer on 02/24/2020. A follow-up CCTV assessment, conducted on 02/27/2020, found no
sewer infrastructure concerns that may have been attributed to further contractor damage
downstream.
The events leading to this spill can be considered exceptional, unintentional, temporary, and caused
by factors beyond our reasonable control. Furthermore, the SSO could not have been prevented by the
exercise of reasonable control, such as routine operations and maintenance, adequate treatment
facilities, or collection system facilities or components.

Before this event, maintenance records show that parts of this collection system were assessed
as follows:
Flushing
activities
CCTV activities
Inspection activities
8/13/2001
1/6/2006
3/28/2005
9/19/2003
10/6/2001
1/9/2006
1/9/2006
7/1/2019
10/7/2001
1/10/2006
4/24/2009
6/5/2003
7/12/2006
3/11/2010
8/14/2003
10/27/2007
4/12/2013
Repair activities
9/11/2003
6/10/2008
7/9/2014
9/11/2003
10/20/2003
4/13/2009
9/12/2003
2/23/2004
5/11/2009
11/5/2003
2/25/2004
5/28/2009
Easement
7/13/2006
3/23/2005
4/19/2010
Assessment
7/17/2006
7/13/2005
11/23/2010
4/13/2007
5/6/2009
12/16/2005
9/15/2012
Raleigh Water Code Enforcement has assessed the contractor for the incurred damages to both
water and sewer assets. Prior to this event, this location experienced a sewer spill -related root
intrusion, on 11/23/2010, which was remedied during the spill mitigation.
The latest maintenance / inspection assessment for this site was conducted on 06/12/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. There have been no additional issues associated with this section of the collection
system since the last sewer event. No further action is required.
Paee 28 of 39

Incident Number # 202000829 - 2/28/2020 - Intersection of Pinecroft and Sweet Briar drive
This spill was neither willful nor intentional, it was the result of a grease build-up, restricting the
sewer flow within a section of 8-inch sewer gravity main. This build-up led to a sewer spill of
approximately 1,338 gallons of untreated wastewater in which about 1,238 gallons reached surface
waters through an unnamed tributary within the Perry Basin.
On 02/28/2020, at approximately 7:18 AM, Sewer Maintenance staff was notified of a sewer spill
emanating from manhole SMH136660, near the intersection of Pinecroft Dr. and Sweet Briar Dr.,
Raleigh. The responding staff took all reasonable steps to stop and mitigate the impact of the discharge
as soon as they arrived, gaining control of the spill event by 08:30 AM on the same day. Crews utilized
hydraulic jetting to remove the source of the blockage within the affecting asset, thus restoring sewer
flow.
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary spill containment site downstream of the affected area. This approach was intended to
contain the flow of sewer and minimize the environmental impact to the surrounding land.
During the restoration phase of the operation, crews utilized ample potable water to flush the
affected area and to remove traces of sewer from the creek. Crews employed pumps at the temporary
containment site, to recover flushed wastewater and any evidence of sewer back into a downstream
sewer manhole. The areas around the manhole were cleared of debris, treated with an application of
lime, and restored with grass seed and straw. This spill was contained without a significant
environmental impact to the adjacent area and its natural resources. Visual inspection of the affected
area and downstream waters confirmed that no fish kill, or unnecessary vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $456.50. The approximate
cost to the Utility to have treated 1,238 gallons of wastewater would have been approximately $1.85.
The City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of
sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume
of sewage created by the spill.
This section of the collection system serves a residential area east of Six Forks Rd., providing
sewer collection to over 350 properties. The last recorded sewer spill associated with this section of the
sanitary sewer collection system occurred on 10/27/2018. No other sewer spills have occurred since
2/28/2020

Prior to this event, maintenance records show that sections of this collection system were
assessed as follows:
Flushing activities
CCTV activities
Inspection activities
05/14/2009
3/16/2015
5/26/2015
20 sewer assets located within the
05/15/2009
10/13/2015
06/7/2017
sanitary sewer easement were
8/31/2010
06/21/2017
06/27/2017
inspected between 11/4/2019 and
11/4/2010
06/11/2018
08/3/2018
11/5/2019
11/5/2010
09/18/2018
10/31/2018
5/15/2012
09/19/2018
03/11/2019
5/24/2012
10/28/2018
Repair activities
5/25/2012
10/30/2018
Easement
04/26/2017
3/18/2013
02/28/2020
Assessment
12/3/2013
03/10/2020
11/6/2018
2/26/2014
03/16/2020
11/7/2018
6/21/2014
06/9/2020
11/8/2018
The latest maintenance / inspection assessment for this site was conducted on 06/12/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. There have been no additional issues associated with this section of the collection
system since the last sewer event. This site has been added to the Hot Spot Management Program for
debris management with a recommended maintenance interval of every 90 days.
Paup in of 3W

Incident Number # 202000895 - 3/7/2020 - 3820 Williamsborough Ct.
This spill was neither willful nor intentional, it was the result of root intrusion, which blocked a
portion of an 8-inch Vitrified Clay Pipe (VCP). The root intrusion led to a sewer spill of approximately
2,150 gallons of untreated wastewater reaching surface waters through an unnamed tributary in
Crabtree Basin.
On 3/7/2020, at approximately 3:41 PM, Sewer Maintenance staff was notified of a sewer back-
up behind the residence at 3820 Will iamsborough Ct., Raleigh. Upon arrival, it was discovered that
untreated sewer was emanating from an adjacent manhole (SMM144286). The responding staff took all
reasonable steps to stop and mitigate the impact of the discharge as soon as they arrived, gaining
control of the spill event by 7:05 PM an the same day. Crews utilized hydraulic jetting to remove the
source of the blockage within the affecting asset thus restoring sewer flow
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary sewer containment site downstream from the SSO location to stop the flow of sewer into the
stream. Crews used pumps at the temporary containment site, to recover the remaining sewer back into
a downstream sewer manhole. During the restoration phase of the operation, crews utilized water from
adjacent hydrants to defuse and flush the affected area. The area around the manhole was cleared of
debris, treated with an application of lime, and restored with grass seed and straw. This spill was
contained without a significant environmental impact to the adjacent area and its natural resources.
Visual inspection of the affected area and downstream waters confirmed that no fish kill, or unnecessary
vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $2,290.25.
The approximate cost to the Utility to have treated 2,150 gallons of wastewater would have been
approximately $3.22. The City saved no money from this spill. Its costs for cleanup exceeded the cost of
treating the volume of sewage had no spill occurred. Furthermore, the City still had to pay the cost to
treat the greater volume of sewage created by the spill.
This section of the collection system provides sewer services to over 70 properties south of
1-440, Raleigh. Before this incident, there have been no other sewer spills associated with root intrusion
in this area. A press release notification associated with this event was published in the Raleigh News &
Observer on Monday, January 6th, 2020.
M1u_- iH __F in

Before this event, maintenance records show that sections of this collection system were
assessed as follows:
Flushing activities
CCTV activities
Inspection activities
6/9/2010
11/18/2015
09/11/2009
41 sewer inspections within the
6/17/2010
02/10/2020
05/26/2020
sanitary sewer easement were
3/1/2011
02/11/2020
inspected between
11/15/2011
02/19/2020
01/24/2018 and 3/12/2020
12/7/2011
02/28/2020
11/5/2013
03/16/2020
Repair activities
11/6/2013
03/16/2020
9/24/2013
11/7/2013
03/17/2020
12/5/2013
03/22/2020
12/6/2013
03/28/2020
A second root related spill occurred on 05/25/2020 where 480 gallons of untreated wastewater
was released onto the surrounding area not reaching surface waters. A follow up CCTV assessment
conducted on 05/26/2020 found root intrusion as the root cause. The sewer main was consequently
flushed that day. This area has accessibility issues preventing crews from entering with critical
equipment that would address further root intrusion. Due to this challenge Raleigh Water Capital
Improvement Program has scheduled the area to be slip lined in order to eliminate or minimize the
potential of a root intrusion re -occurrence. This project is currently under way.
The latest maintenance / inspection assessment for this site was conducted on 06/12/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. There have been no additional issues associated with this section of the collection
system since the last sewer event. This site has been added to the Hot Spot Management Program for
debris management with a recommended maintenance interval of every 90 days dependent upon
accessibility and completion of the pipe lining project.
paaa 17 of 3q

Incident Number # 202000994 - 3/12/2020 - 817 McMakin 5t. Raleigh
This spill was neither willful nor intentional, it was the result of a grease build-up, restricting the sewer
flow within a section of 8-inch vitrified clay sewer gravity main. This build-up led to a sewer spill of
approximately 1,215 gallons of untreated wastewater reaching surface waters through the Watson
Branch tributary within the Walnut Basin.
On 3/12/2020, at approximately 9:39 AM, Sewer Maintenance staff was notified of a sewer spill
emanating from an adjacent manhole at located behind 817 McMakin St., Raleigh. The responding staff
took all reasonable steps to stop and mitigate the impact of the discharge as soon as they arrived,
gaining control of the spill event by 11:00 AM on the same day. Crews utilized hydraulic jetting to
remove the source of the blockage within the affecting asset, thus restoring sewer flow.
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary spill containment site downstream of the affected area. This approach was intended to
contain the flow of sewer and minimize the environmental impact to the surrounding land.
During the restoration phase of the operation, crews utilized ample potable water to flush the
affected area and to remove traces of sewer from the stream. Crews employed pumps at the temporary
containment site, to recover flushed wastewater and any evidence of sewer back into a downstream
sewer manhole. The areas around the manhole were cleared of debris, treated with an application of
lime, and restored with grass seed and straw. This spill was contained without a significant
environmental impact to the adjacent area and its natural resources. Visual inspection of the affected
area and downstream waters confirmed that no fish kill, or unnecessary vegetative damage occurred.
The cost associated with the mitigation of this event amounted to $1,143.02. The approximate
cost to the Utility to have treated 1,215 gallons of wastewater would have been approximately $1.82.
The City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of
sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume
of sewage created by the spill.
This section of the collection system serves a residential area south of Bragg St. It provides sewer
collection services to over 30 single-family and multi -dwelling properties. The last recorded sewer spill
associated with this section of the sanitary sewer collection system occurred on 10/4/19.

Prior to this event, maintenance records for the last ten years show that sections of this
collection system, which includes sewer assets located within Trailside Dr., S State St., Mcmakin St,
Highcourt Dr., Garner Rd., Carnage Dr., and Bragg St., were assessed as follows:
Flushing activities
CCTV activities
01/01/2010
6/11/2012
7/7/2015
5/5/2010
4/16/2010
8/9/2012
7/14/2015
08/8/2018
4/30/2010
8/22/2012
7/23/2015
10/21/2019
5/4/2010
12/10/2012
10/8/2015
10/21/2019
7/9/2010
3/15/2013
10/9/2015
10/21/2019
9/24/2010
3/22/2013
12/17/2015
12/18/10
6/11/2013
02/22/2017
2/17/2011
9/4/2013
05/31/2017
3/3/2011
10/16/2013
09/13/2017
3/18/2011
11/14/2013
05/1/2018
5/23/2011
11/16/2013
05/1/2018
5/24/2011
5/31/2014
08/23/2018
5/31/2011
8/8/2014
10/31/2018
6/1/2011
10/14/2014
07/31/2019
8/5/2011
10/15/2014
08/2/2019
11/13/2011
11/13/2014
08/5/2019
11/22/2011
12/19/2014
09/3/2019
11/25/2011
3/30/2015
03/2/2020
12/6/2011
4/23/2015
03/3/2020
3/7/2012
5/5/2015
03/24/2020
03/25/2020
Inspection activities
48 sewer assets located within
the sanitary sewer easement
were inspected between
11/17/2017 and 04/21/2020
The latest maintenance / inspection assessment for this site was conducted the week of 06/3-
5/2020. Sewer mains were flushed finding minor root intrusion and grease accumulation within some
segments of pipe. There have been no additional issues associated with this section of the collection
system since the last sewer event. This site has been added to the Hot Spot Management Program for
root management with a recommended maintenance interval of every 60 days. Additionally, this site
has been added to the State Street Sewer Replacement Project, currently in the design phase, to address
the structural issues identified within two aerials downstream from the overflow site.
Pane 14 of I9

Incident Number tf 202001058 - 3/22/2020 - 44 E. Hester Ct. Wendell
This spill was neither willful nor intentional, it was the result of an illegal introduction of foreign debris
(rocks, logs and sticks, see images below) into the collection system through a manhole. This illegal
introduction of foreign debris, considered an act of vandalism, resulted in the interruption of sewer flow
within a section of 12-inch PVC sewer gravity main. This build-up led to a sewer spill of approximately
2,300 gallons of untreated wastewater reaching surface waters through an unnamed tributary of Buffalo
Lower Basin. This event was corroborated by an eyewitness whom observed several teenagers putting
the material into several manholes near his property.
On Sunday, March 22, 2020, at approximately 2:25 PM, Raleigh Water - Sewer Maintenance
Division staff was notified of a sewer spill emanating from a sewer manhole located behind 44 E Hester
Ct., Wendell. The responding staff took all reasonable steps to stop and mitigate the impact of the
discharge as soon as they arrived, gaining control of the spill event by 4:20 PM on the same day. Crews
utilized hydraulic jetting to remove the source of the blockage within the affecting asset. Several pieces
of oversized rock and tree branches were manually removed thus restoring sewer flow.
Containment, collection, cleanup, and restoration of this spill event consisted of employing a
temporary spill containment site downstream of the affected area. This approach was intended to
contain the flow of sewer and minimize the environmental impact to the surrounding land.
During the restoration phase of the operation, crews utilized ample potable water to flush the
affected area and to remove traces of sewer from the stream. Crews employed a pump at the
temporary containment site, to recover flushed wastewater and any evidence of sewer back into a
downstream sewer manhole. The areas around the manhole were cleared of debris, treated with an
application of lime, and restored with grass seed and straw. This spill was contained without a significant
environmental impact to the adjacent area and its natural resources. Visual inspection of the affected
area and downstream waters confirmed that no fish kill, or unnecessary vegetative damage occurred.
n_.... 2c _f un

The cost associated with the mitigation of this event amounted to $1,882.05. The approximate
cost to the Utility to have treated 2,300 gallons of wastewater would have been approximately $3.45.
The City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of
sewage had no spill occurred. Furthermore, the City still had to pay the cost to treat the greater volume
of sewage created by the spill.
This section of the collection system serves a residential area east of Wendell Falls Pkwy. It
provides sewer collection services to over 100 properties. This site has no history of related spills.
A press release notification associated with this event was requested to be published in the
Raleigh News & Observer on 1/22/2020 8:52 AM. A police report was filed for this event, with Wendell
Police Department, Report #-20000129 (included in this letter).
Due to COVID 19 restriction outreach information was delivered on 06/10/2020. Educational
letters were mailed to properties near the easement where the SSO occurred (see graphic below). This
outreach literature explains the need for customers to use the sanitary sewer collection system
properly. It also serves as an opportunity for citizens to partner with Public Utilities to protect the City's
water quality and the sewer collection infrastructure.
Prior to this event, maintenance records show that sections of this collection system, were
assessed as follows:
Flushing activities Inspection activities
01/16/2017 18 sewer assets located within the sanitary sewer
easement were inspected between 2/14/2018 and -
03/23/2020 12/12/2019
03/25/2020
06/20/2020
The latest maintenance / inspection assessment for this site was conducted on 06/12/2020.
Visual inspection of the upstream and downstream manholes determined that sewer flow within the
pipe is consistent. There have been no additional issues associated with this section of the collection
system since the last sewer event. No further action is required.
Paap W; of *q

Summary
The Raleigh Water, Division of Sewer Maintenance, strives to develop initiatives that improve
operational reliability with the goal to meet customer expectations and to meet or exceed the
requirements of the Water Quality Collection System permit. Our operations are focused in continual
improvement, the prevention of pollution and increased efficiency in environmental performance. The
Division continues to operate an indecently audited ISO Certified Environmental Management System
governed by the 14001-2015 Standards. As part of this initiatives the Division operates a comprehensive
reactive and preventative maintenance program whose goal is not only to maintain over 2600 miles of
sanitary sewer pipe but also to minimize the accidental release of untreated wastewater.
Since July 1, 2019 (Fiscal Year 2020), the Utility has maintained approximately 382 ]1] miles of
gravity sewer mains, by flushing with hydraulic jetting, CCTV assessments, repair operations, easement
maintenance and inspections. The fiscal year 2020 cost of these operations amounted to $3,102,022.92,
or approximately 23% of the Division's annual operating budget. The total volume of sewer spills
identified in this letter add up to 45,535 gallons at a total mitigating cost of $56,193.55. The total gallons
reported release for the same time period in 2019 was 316,528 gallons. This is a substantial reduction of
reportable spill volume of sewer spilled, which we attribute to our SSO mitigating response plans and
increase in maintenance efforts.
The City's cost of sewer treatment per gallon is $.0015 12] At this rate, it would have cost the City
$68.30 to treat the 45,535 gallons of untreated wastewater reported in the letter. This fiscal comparison
shows the City's commitment to environmental protection sparing no cost regardless of the severity and
complexity of the spill event. The City continues to demonstrate due diligence in environmental
performance by allocating the necessary resources to a spill event regardless of the associated cost. This
effort is noted in the City's low SSO performance rate of 2.25 spills per 100 miles of pipe, compared to
the Southeastern Region of the US, of 7.0 spills per 100 miles of pipe.
]1] 382 miles represents 14%of the sanitary sewer collection system
121 $,0015 is based on the annual water treatment operating cost compounded by the total treated effluent
Additionally, City of Raleigh Public Utilities Department has become involved in challenging the
standards of the nonwoven fabrics industry to bring about a better understanding by consumers of
these products and their detrimental effects on the collections systems. PUD staff has personally met
with officers of INDA, the leading association of the non -woven fabrics industry based in Cary, NC, to
communicate our concerns about these fabrics, the current industry standards, and better education for
the consumer. PUD has also joined forces with other utilities nationwide through the National
Association of Clean Waters Agencies (NACWA), the Water Environment Foundation (WEF), and the
American Public Works Association (APWA) to challenge INDA and current industry standards,
recognizing that they do not support compatibility in sanitary sewer collections systems nationally.
These agencies are working collectively to challenge the testing protocols, assessment guidelines, and
consumer education and labeling of these non -dispersible.
It is essential to mention that the reportable sewer events identified in this letter (January —
March 2020) show that 33% of SSOs were related to grease; a 15 % increase from events occurred
during the same period in 2019. Between January 15t and July 1", 2020, 40% of reportable spills have
been related to grease accumulation. Public Utilities continues to increase its educational outreach to
reduce this trend. The Department has developed new educational material as well as informational
D- a7 nf''40

videos designed to reach not only food service establishments but residential customers as well. The
City is also developing initiatives to increase partnerships with residential customers to address grease
accumulation and proper disposal. The educational material and videos can access through social media
and our Department's website https://raleiehnc.eov/sewer-maintenance
In 2018 the Public Utilities Department increased the efforts of community outreach to further
inform the community throughout direct participation in the City's Citizens Advisory Committees.
Through this initiative, the Public Utilities Department has been able to reach numerous Council Districts
with a consistent message of collaboration and environmental partnership. The Department is currently
developing year three of this effort. Furthermore, this message has been made available not only to the
community but to City Council officials as well. A sample of this message is attached to this letter for
reference.
The City continues its monetary reward program or bounty program, which pays out fifty ($50)
dollars to any citizen that observes and reports an SSO or conditions that may cause a spill event. This
program has been advertised via printed material, a television advertisement campaign, and graphic
design "wraps" on Sewer Maintenance vehicles. These graphics on our vehicles function as mobile
billboards spreading our message of prevention and offering contact information, throughout the
service area each day. This program was developed with the hope that citizens and customers would
become more aware of the signs of an emerging system problem causing the 550 occurrence and
become proactive in helping the City to prevent these occurrences. Additionally, all customers are
notified via their water and sewer utility bills not to discharge improper materials into the sanitary
sewer mains. The City also circulates information regarding discharging of grease into the sewer system
and the effects of such deposits. Whenever possible, and upon the investigation of the root cause of a
spill event, PUD Code Enforcement officers develop and send registered informational letters about the
spill event to the customer base serviced by the line where the SSO has occurred. This is done to
educate our customers in the proper use of the sanitary sewers to prevent disposal of non-flushable
items and items harmful to the continuous operation of the collections system.
On behalf of the City of Raleigh, I am requesting that the NOV-NOl issued for the first quarter of
2020 be reviewed taking into consideration the steps the Department has undertaken to protect the
environment and meet or exceed the requirements of the Collections System Permit. If additional
information is required, please contact Matthew Vessie, Sewer Maintenance Superintendent (919) 996-
2312 or T.J. lynch, Assistant Public Utilities Director, at [phone].
Ntop 3R of;4

cerely,
dW
Car os M Perez, ORC
Assistance Superintendent, Sewer Maintenance Division
City of Raleigh Public Utilities Department
P.O. Box 590
Raleigh, NC 27602-0590
919-996-5929 office
919-278-6020 cell
Carlos. perezcamacho(@raleiehnc.Gov
CC: Robert Massengill, Public Utilities Director
T. J. Lynch, Assistant Public Utilities Director - Wastewater
Matthew P Vessie, Superintendent Sewer Maintenance Division
Attachments
1. Wendell Police Department, Report #-20000129 Incident Number # 202001058 - 3/22/2020 - 44
E. nester Ct. Wendell
Dana IQ of RQ

This bulletin was sent to the following groups of people:
Subscribers of Media List (121 recipients
Prepared By: Jacob D_ Barnhart, CoTM+**+tm ty Relations Coordinator, Raleigh grater
For More Information: T.J. L)nch, Assistant Raleigh Water Director, 919-996-3245
March 23, 2020
Raleigh Water Responds to a Sanitary Sewer Overflow
On Sunday, March 22, at approximately 2:25 p.m, Raleigh Water - Sewer
M2intenance Division staff responded to a sanitary sewer overflow located at 44 East
Hester Court, Wendell, KC. The cause of the overflow teas a result of large rocIm and logs
placed into the sewer system through acts of vandalism. A police report has been initiated.
The responding staff took all reasonable steps to atop and mitig-ate the impact of the
overflow as soon as they arrived. The North Carolina Department of Emaronmental
Quality, Dn-ision of Water Resources n-as notified of the overflow-.
Raleigh Water - Sewer Ilautenance Division staff stopped the overflow at
approximately 4:20 pm. on the same day. It is estimated that the overflow discharged a
volume of approximateh, 2,300 gallons of untreated wastewater which reached an unnamed
tributary within the Buffalo Long Basin. Restoration associated wrth this overflown event
w-as completed on the same dar.
The City of Raleigh has an aggressive education and enforcement program to
prevent the discharge of grease, debris, and other improper materials in the sewer
system and to take enforcement action where appropriate. Only water, human waste,
and toilet tissue are permitted to be discharged into the sewer system. If citizens
experience excessive sewer smells or see sewer overflowing manholes or pipes, please
call 919-996-3245 and report immediately.
This news release is requdred by NCGS article 21, Chapter 143.215.1C_ For more
information, contact , asistant Raleigh Water Director T.J_ Lynch at 919-996-3245.
iO sNnxt
Vlew as a Web pegs
raleighnc.gov
City of Raleigh a, 000
Communications Department
oommunicationsCraleighne.gov 1019-998-3100 /,
1-
ii © man Raleigh
Manaue Subscription I View Help

I
N
�
D
Agency Name
Wendell Police Department
INUIUMFM I tl1V V C%') I IU/A 11UN
REPORT
Case#
20-1700129
Date /Time Reported
031221202019.10 Sun
Opi
NC 0920800
Last Known Secure
031151202019:10 S tun
Location of Incident
44 E Hester C1, [Pendell NC 27591-
Premise Type Zone/Agency
Fieldlivoods WP03, Wi'D
At Found
031221202019:10 Suit
E
N
3
# 1
Crime Incidcnl(s) (Com)
Damage To Property / Vandalism
1400
Weapon 1 Tools
Activity
Entry
Exit Security
D
A
T
A
#2
Crime Incident
Weapon 1 Tools Activity
Entry
Exit
Security
3
Crime Incident ( )
Weapon 1 Tools Activity
Entry
Exit
Security
Iv10
# of victims J
Type: BUSINESS Injury: Domestic N
V
I
VI
Victim/Business Name (Last, First, Middle)
CITY OF RALEIGH
Victim of
Crime 0
f,
DOD
Age
Ratx
Sex
Relationship
To Offender
I Resident Status
Military
BranchlStatus
C
T
1 [ome Address
home Phone
I
M
Employer Name/Address Business Phone
Mobile Phone
VYR
I Make
Model
Style
Color
UdLis VIN
CODES: V- Victim (Denote V2, V3) 0 - Owner (if other than victim) R-Reporting Person ifother than victim
O
Type: INDIVIDUAUNOTLAW ENFORCEMENT Injury:
T
ti
Code
RP
Name (Last, First, Middle)
MACKAYADAMJOSEPH
,E
Victim of
Crime#
DOB
0212511976
Age 44
Race
lY Im
Sex
Relationship
To Offender
Resident Status
Resident
Military
Btanch/Status
R
S
I [me Address
432 Swann Trl Clayton, NC 27527
Home Phone
919-239-4216
I
EmployerNamc/Addross
Business Phone
1
Mlobile Phone
781-831-7077
N
Type: Injury:
V
0
I.
V
Code
Name (Last, First, Middle)
Victim of
Crime N
DOB
Age
Race
Sex
Relationship Resident Status
To Offender
Military
Branch/Status
E.
U
Horne Address
Home Phone
mp o_eR amdAd dress I W—tsiness Phone
I Mobile Phone
I - None 2 - Burned 3 - Coutiterfeit 1 Forged 4 = Damaged 1 Vandalized 5 = Recovered 6 = Seized 7-Stolen 8 a Unknown
"OJ" - Recovered for Other Jurisdiction
VI
Code
Status
Value
OJ
OTY
properly Description
Makeilvlodel
Scrial Number
99
1
S1,000.00
1
SEWERLINF.
P
R
0
P
C
R
.1.
Y
OfficcrALV
MCGHEE
T. R. (PAT PA VP5188
Invest ID# 0
Supervisor GILL, J. E. (PAT, PAT) (IYP28)
Status
Complainant Signature
Case Status
lnaclive 0312212020
Case Disposition_
Page 1
g
R CSI19R Printed By: WPD5116, SysN. 239124 06/3012020 09.58

INCIDENTIINVESTIGATION REPORT
Wendell !Police Departmew
Case # 20-000I29
Slalus I - None 2 - Burned 3 - Counterfeit / Forged 4 o Damaged / Vandalizcd 5 - Recovered 6 " Seizcd 7 = Stolen 8-Unknown
Codes
IBR
Status
Quantity
Type Measure
Suspected Type
Up to 3 types of activity
D
R
U
G
S
Assisting Officers
Suspect Hate / Bias Motivated:
NARRATIVE
1 Csmp BY. W11D5116, 06/30/2020 09:58 Page 2

REPORTING OFFICER NARRATIVE
O'endell Police Department
Victim offense
CITY OF RALEIGH I DAMAGE TO PROPERTY/ VANDALISM
THE INFORMATION BELOW IS CONFIDENTIAL - FOR USE BY AUTHORIZED PERSONNEL ONLY
OCA
20-000129
Dale / Time Reported
Sun 0312212020 19:10
On 03/22/2020 I Ofc. McGhee spoke with a City of Raleigh employee Adam Mackay. Adam advised that he was
currently at 44 E Hester Ct. and it appeared that the sewer line was vandalized. Inside the manhole someone had
thrown large logs and rocks down into the sever. A witness observed several kids in that area a week prior and
believed they were the suspects.
Over the week the debris thrown down into the line clogged up the line and resulted in a estimated 2300 Gallons of
waste overflowing partially into the creek nearby. City of Raleigh was already handling same and advised they
needed a PD report for the state.
The kids appeared to be inbetween the age range of 9-14 and are seen from time to time riding dirtbikes in the area.
The Ivan hole is on a easement behind 44 E Hester Ct next to a creek.
No Further
Reporting Officer: VICGHE& 7: R. Printed By. ►1'PD5116, 06/30/2020 09.58 Page 3
R CS3NC

Incident Report Related Property List
Wendell Police Deparintenl
oCA : 20-000129
Property Description
Make
Model
Caliber
SEWER LINE
Color
Serial No.
Value
Qty
Unit
Jurisdiction
$1 000.00
1.000
Locally
Status
Date
5tate
Local k OAN
Destro ed/dmna a
IMCH
031=020
Name (Last, First, Middle)
1O13
Age
Race
Sex
CV, D Raleigh,
Notes
R CSOIBR Printed By: WPD5116, 06/30/2020 10:01 Page 4