WQCS00031_NOV-2022-DV-0198_20220803 RSP

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I OWASA
August 3, 2022
Orange Water and Sewer Authority
OWASA is Carrboro-Chapel Hill's not -for -profit public service agency
delivering high quality water, wastewater, and reclaimed water services.
Mr. Scott Vinson, Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, North Carolina Division of Environmental Quality
3800 Barrett Drive
Raleigh NC 27609
Subject: Response to Notice of Violation (NOV-2022-DV-0198)
Sanitary Sewer Overflows — June 2022
Collection System Permit No. WQCS00031
Dear Mr. Vinson:
As requested in your letter of July 14, 2022 (received on July 21, 2022) we are writing to
provide you information for the three separate and unrelated Sanitary Sewer Overflows
(SSO) cited in the above referenced letter. The incidents occurred on June 20, 2022 at
408 Rosemary Street, Chapel Hill, June 21, 2022 at 102 Creekside Lane, Chapel Hill,
and June 28, 2022 at E. Franklin Street, Chapel Hill.
Incident Number 202200947 — 06/20/2022- 408 Rosemary Street, Chapel Hill, NC
Background
The sewer infrastructure in this area along Rosemary Street was installed in 1947. It
consists of brick manholes and 6" vitrified clay (VC) pipe. OWASA previously cleaned
and inspected the line in October of 2020 and smoke testing was conducted in April of
2022. The last know sewer issue in this location was in 2012. OWASA inspects grease
traps for the adjacent businesses monthly to ensure sewage entering our collection
system is properly conveyed.
Initial Response
On Friday, June 17, 2022, OWASA's on -call crew was dispatched to a sewer backup at
a business located at 408 W. Rosemary Street in Chapel Hill. Upon investigation,
OWASA infrastructure was found to be clear and free flowing. The customer had a
blockage of grease within their sewer service and contacted a plumber to have the
problem properly addressed.
0 400 Jones Ferry Road, Carrboro, NC 27510 O 919-968-4421 0 [e-mail] 0 @OWASAI 0 www.owasa.org

Response to Notice of Violation (NOV-2022-DV-0198)
Sanitary Sewer Overflows -June 2022
Collection Systems Permit No. WQCS00031
August 3, 2022
Page 2
On Monday, June 20, 2022, OWASA's Distribution and Collection Systems technician
received a similar call at the same location. The caller stated again that sewer was
coming out of a customer's clean out and flowing down the street.
Investigation
OWASA crews quickly mobilized to the site to investigate the complaint. Crews found
sewage overflowing from a cleanout at 408 W. Rosemary Street, flowing down the
roadway into a nearby storm drainage inlet. (See Attachment 1) Crews quickly opened
both the upstream and downstream manholes in the area and determined there was in
fact a blockage of our infrastructure and was isolated within a single segment of sewer.
During the investigation and remediation process, crews observed a large amount of
grease in the line.
OWASA's Collection System ORC, Nicholas Rogers arrived on the scene on Monday,
June 20, 2022, at 3:00 PM to investigate the situation. He observed crews were in the
process of addressing the overflow and assisted with the remediation and pumping
wastewater back into the sewer system.
OWASA staff provided the initial spill response notification on June 21, 2022, at
12:44 PM to Stephanie Goss and submitted the Collection System Sanitary Sewer
Overflow Reporting Form CS-SSO on Wednesday, June 23, 2022, at 3:00 PM (See
Attachment 2).
Remediation
OWASA crews immediately mobilized to the scene and began jetting the sewer main
from the upstream and downstream manholes in effort to clear the blockage. The effort
was successful, the blockage was dislodged, and wastewater stopped overflowing at
3:15PM on June 20, 2022.
Crews cleaned the area within the spill site and flushed the affected storm drainage
system. All contaminated water and subsequent debris created during the cleaning and
flushing process was collected with a vacuum truck and returned to the sewer system.
OWASA crews then moved to address the contaminated surface water. They found that
the wastewater was pooled in an area and began to pump the wastewater back into the
sewer system. Samples were collected upstream and downstream of the impacted area
and were taken to OWASA's Wastewater Treatment lab to confirm that the wastewater
was removed from the surface waters.
After the blockage was dislodged, OWASA's Preventative Maintenance Crew
conducted video inspections of the sanitary sewer lines and found no additional

Response to Notice of Violation (NOV-2022-DV-0198)
Sanitary Sewer Overflows -June 2022
Collection Systems Permit No. WQCS00031
August 3, 2022
Page 3
evidence of blockages or additional damage to the infrastructure that would have
caused the overflow.
Root Cause of the Overflow
During our remediation efforts, the crew observed a large amount of grease passing
through the downstream manhole when the blockage was dislodged. We confirmed no
other issues within the line during subsequent closed-circuit television (CCTV)
inspections on Tuesday, June 21, 2022. The root cause of the overflow is due to grease
blocking a large portion of the sewer main resulting in a sewer backup that surcharged
within the sewer system and overflowed from the customer's cleanout.
Efforts to Improve
OWASA continues to educate this customer on the negative effects of discarding
grease and the effects it has on our sewer system during our monthly grease trap
inspections and during the overflow response. These efforts are in addition to annual
information distributed to our customers as part of our wastewater report card and
sewer ordinance and grease information that is displayed publicly on our website.
Commitment to the highest level of environmental stewardship has been and continues
to be one of the fundamental principles of OWASA. We believe that OWASA's actions
before, during, and after the event reflect this commitment. OWASA requests that you
consider these key factors in any subsequent action the Division of Water Resources
might take:
• OWASA staff addressed the issue immediately to minimize the impact.
• OWASA met all reporting requirements.
• OWASA is continuously improving and updating our sewer preventative
maintenance program.
• OWASA performed post incident cleaning and CCTV inspection to ensure the
grease issue has been fully addressed.
• OWASA performs monthly grease trap inspections at the local restaurant to
ensure grease is being handled in proper manner.
• OWASA has a Capital Improvements Program (CIP) project scheduled to be
completed this fiscal year to upsize this line from 6" VC to 8" PVC to improve
service in this area.

Response to Notice of Violation (NOV-2022-DV-0198)
Sanitary Sewer Overflows -June 2022
Collection Systems Permit No. WQCS00031
August 3, 2022
Page 4
Incident Number 202200948 — 06/21/22 102 Creekside Lane, Chapel Hill
Background
The sewer infrastructure in this area along Creekside Lane in the Countryside
neighborhood in Chapel Hill was installed in 1973. It consists of precast concrete
manholes and 8" vitrified clay (VC) pipe. OWASA previously cleaned and inspected the
line in September of 2020, smoke testing was conducted in October of 2021, and
manholes were inspected as part of the easement maintenance program in May 2022.
OWASA has had no record of previous issues in this area.
Initial Response
On Tuesday morning, June 21, 2022, OWASA was notified of a manhole overflowing by
a citizen at 102 Creekside Lane in Chapel Hill. Remediation crews were immediately
dispatched to the location to address the situation. Upon arrival, OWASA crews found 2
manholes, MH18785 and MH242 overflowing and wastewater spilling into the creek.
(See Attachment 3)
Investigations
OWASA staff opened both the upstream and downstream manholes in the area and
determined the blockage was located downstream of MH 242 and surcharging at both
MH 242 and upstream to MH 18785. OWASA staff immediately dispatched additional
resources and began remediation process to address the overflow.
OWASA's Collection System ORC arrived on the scene on Tuesday, June 21, 2022, at
10:00 AM to investigate the situation. He observed that the overflow had been stopped
and that the wastewater had in fact reached surface waters at Cedar Fork.
OWASA staff provided the initial spill response notification on June 21, 2022, at
12:44 PM to Stephanie Goss and submitted the Collection System Sanitary Sewer
Overflow Reporting Form CS-SSO on Thursday, June 23, 2022, at 8:00 AM (See
Attachment 4).
Remediation
OWASA crews attempted to clear the blockage assumed to be within the 8" sewer line
by jetting the line with high pressure water but were unsuccessful. Crews began to
bypass the affected sewer lines by utilizing bypass pumps and vacuum equipment to
redirect flow and clear the surcharged wastewater from the affected manhole. This effort
was successful and stopped the overflow at 9:51 AM.

Response to Notice of Violation (NOV-2022-DV-0198)
Sanitary Sewer Overflows -June 2022
Collection Systems Permit No. WQCS00031
August 3, 2022
Page 5
Upon removal of the surcharged wastewater within MH 242, the crew found a large
amount of debris lodged in the manhole, including a 42" long, large log blocking the
invert out. All the debris was removed, the bypass operation was terminated, and
normal sewer flow was resumed.
To confirm the extents of the spill within the surface waters, samples were collected
upstream and downstream of the impacted stream and delivered to OWASA's
Wastewater Treatment lab. The lab confirmed that the spill was contained to a short
section of the stream. Two portable pumps were placed in the affected area and
removed contaminated water from the stream back into our sewer system. We cleaned
and flushed the area with clean water until we had undetectable levels of wastewater
evident in the stream.
Root Cause of the Overflow
The root cause of the sanitary sewer overflow was due to vandalism. During our
remediation efforts, we observed debris lodged within the manhole and confirmed no
other issues within the line. This debris blocked the 8" sewer main invert out within MH
242, resulting in a sewer backup that surcharged the sewer system and overflowed from
the upstream manhole. This debris was too large to pass through the 8" sewer main and
therefore assumed to be placed in the sewer manhole.
Efforts to Improve
Commitment to the highest level of environmental stewardship has been and continues
to be one of the fundamental principles of OWASA. We believe that OWASA's actions
before, during, and after the event reflect this commitment. OWASA requests that you
consider these key factors in any subsequent action the Division of Water Resources
might take:
• OWASA staff addressed the issue immediately to minimize the impact.
• OWASA met all reporting requirements.
• OWASA educated the community about unauthorize uses of sewer systems and
and requested OWASA be notified of any suspicious activity.
• OWASA is continuously improving and updating our sewer preventative
maintenance program.

Response to Notice of Violation (NOV-2022-DV-0198)
Sanitary Sewer Overflows -June 2022
Collection Systems Permit No. WQCS00031
August 3, 2022
Page 6
Incident Number 202201004 — 06/28/22 E. Franklin Street, Chapel Hill
Background
The sewer infrastructure E. Franklin Street in Chapel Hill was installed in 1971. It
consists of precast concrete manholes and 8" vitrified clay (VC) pipe. OWASA
previously cleaned and inspected the line in December of 2020 and smoke testing was
conducted in January of 2022. OWASA has had no record of previous issues in this
area.
Initial Response
On Tuesday, June 28, 2022, OWASA employees working in the area noticed a strong
smell of sewer while driving on E. Franklin Street and immediately dispatched the
Preventative Maintenance Crew to investigate. Upon arrival, the crew searched the area
and discovered wastewater within a drainage ditch that emptied into Booker Creek. The
crew continued to search for a source, followed the wastewater upstream to a wooded
area, and found MH1885 overflowing. (See Attachment 5)
Investigations
OWASA crews opened both the upstream and downstream manholes in the area and
determined the blockage was isolated to a single segment of 8" VC sanitary sewer main
downstream of MH 1885. The overflowed wastewater had pooled within a drainage
ditch that flows into Booker Creek but did not appear to reach surface waters. Samples
were collected in Booker Creek, downstream of the spill location, and taken to
OWASA's Wastewater Treatment lab which confirmed that no wastewater was present
in the stream.
OWASA's Collection System backup ORC, Coyle Bradshaw arrived on the scene on
Wednesday, June 29, 2022, at 8:00 AM to investigate the situation. He observed that
the overflow had been stopped and crews were still working on cleanup and
remediation efforts.
OWASA staff provided the initial spill response notification on June 29, 2022, at
12:45 PM to Dorothy M. Robson and submitted the Collection System Sanitary Sewer
Overflow Reporting Form CS-SSO on Thursday, June 30, 2022, at 7:30 AM (See
Attachment 6).
Remediation
Once the location of the overflow was found, OWASA immediately mobilized resources
to the site to address the overflow. Crews quickly cleaned the line and dislodged the
blockage to stop the overflow. Additional crews were mobilized to begin the cleanup and

Response to Notice of Violation (NOV-2022-DV-0198)
Sanitary Sewer Overflows -June 2022
Collection Systems Permit No. WQCS00031
August 3, 2022
Page 7
remediation process. These crews worked to flush, clean, and remove all spilled
wastewater from the drainage ditch. All pooled wastewater from the overflow and
contaminated water used in the cleaning process was collected and pumped into the
sewer system.
After the blockage was dislodged, the overflow was stopped, and cleanup and
remediation efforts were complete, OWASA staff conducted video inspections of the
sanitary sewer lines and found no additional evidence of blockages and no damage to
the infrastructure that would have caused the overflow.
Root Cause of the Overflow
The root cause of the sanitary sewer overflow was due to a large amount of rags and
debris within the sewer line. During remediation efforts, the crew observed debris
passing through the manhole when the blockage was dislodged during the jetting
process. Subsequent CCTV footage showed no additional debris in the line; however,
roots were present and could have been a contributing factor in the cause of the
overflow.
Efforts to Improve
Commitment to the highest level of environmental stewardship has been and continues
to be one of the fundamental principles of OWASA. We believe that OWASA's actions
before, during, and after the event reflect this commitment. OWASA requests that you
consider these key factors in any subsequent action the Division of Water Resources
might take:
• OWASA staff addressed the issue immediately to minimize the impact.
• OWASA met all reporting requirements.
• OWASA removed roots from the line and added segments in the affected area to
our annual root treatment program.
• OWASA is continuously improving and updating our sewer preventative
maintenance program.
We hope that the information provided herein is sufficient to understand the details of
the events and OWASA's response, please feel free to contact us should you have any
further questions.
Sincerely,
Todd Taylor, P.E.
Executive Director

Response to Notice of Violation (NOV-2022-DV-0198)
Sanitary Sewer Overflows -June 2022
Collection Systems Permit No. WQCS00031
August 3, 2022
Page 8
cc: Mary Darr, P.E., General Manager of Operations
Jesse DuClau, Distribution and Collection Systems Manager
Nicholas Rogers, Assistant Distribution and Collection Systems Manager,
Collection System ORC
Attachments:
1. 408 Rosemary Street Spill and Sample Map
2. 408 Rosemary Street SSO Report
3. 102 Creekside Lane Spill and Sample Map
4. 102 Creekside Lane SSO Report
5. E. Franklin Street Spill and Sample Map
6. E. Franklin Street SSO Report

Attachment 1: 408 Rosemary Street Spill and Sample Map - Incident #202200947
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This map contains sensitive information, not to be copied or
distributed without the express written permission of OWASA. This -,
data is being provided as a visual representation and at no time
should the data be considered exact. The data is not guaranteed to
be accurate and is not intended as a substitute for a field survey.
OWASA assumes no legal liability or responsibility for this data.
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Attachment 2
DWR
Division of Water Resources
State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
Collection System Sanitary Sewer Overflow Reporting Form
Form CS-SSO
PART I:
This form shall be submitted to the appropriate DWQ Regional Office within five business days of the first knowledge of the
sanitary sewer overflow (SSO).
Permit Number: WQCS00031 (WQCS# if active, otherwise use WQCSD#)
Facility: OWASA Collection System Incident #: 202200947
Owner: Orange Water and Sewer Authority
City: Carrboro County: Orange
Region: Raleigh
Source of SSO (check applicable): [ [ Sanitary Sewer ❑ Pump Station / Lift Station
SPECIFIC location of the SSO (be consistent in description from past reports or documentation - i.e. Pump Station 6,
Manhole at Westall & Bragg Street, etc): 408 Rosemary
Manhole #:
Latitude (Decimal Degrees): Longitude (Decimal Degrees):
Incident Started Dt: 06/20/2022 Time: 2:15 pm Incident End Dt: 06/20/2022 Time: 03:15 pm
(mm-dd-yyyy) (hh:mm AM/PM) (mm-dd-yyyy) (hh:mm AM/PM)
Estimated Volume of the SSO: 600
gallons Estimated Duration (Round to nearest hour): 1:0 hours
Describe how the volume was determined: Picture Manual
Weather conditions during the SSO event: Dry
Did SSO reach surface waters? Yes ❑ No ❑ Unknown Volume reaching surface waters (gals): 300
Surface water name: Tanbark Branch
Did the SSO result in a fish kill? ❑ Yes 0 No ❑ Unknown If Yes, what is the estimated number of fish killed?
SPECIFIC cause(s) of the SSO:
Q Grease
24 hour verbal notification (name of person contacted ): Stephanie Goss
2 DWR ❑ Emergency Mgmt Date (mm-dd-yyy): 06/21/2022 Time (hh:mm AM/PM): 12:44:00 pm
If an SSO is ongoing, please notify the appropriate Regional Office on a daily basis until SSO can be stopped.
Per G.S. 143-215.1C(b), the responsible party of a discharge of 1,000 or more of untreated wastewater to surface waters
shall issue a press release within 24-hours of first knowledge to all print and electronic news media providing general
coverage in the county where the discharge occurred. When 15,000 gallons or more of untreated wastewater enters surface
waters, a public notice shall be published within 10 days and proof of publication shall be provided to the Division within 30
days. Refer to the reference statute for further detail.
The Director, Division of Water Resources, may take enforcement action for SSOs that are required to be reported to
Division unless it is demonstrated that:
1) the discharge was cause by sever natural conditions and there were no feasible alternative to the discharge; or
2) the discharge was exceptional, unintentional, temporary and caused by factors beyond the reasonable control of the
Permittee and/or owner, and the discharge could not have been prevented by the exercise of reasonable control.
Part II must be completed to provide a justification claim for either of the above situations. This information will be the basis
WHETHER OR NOT PART III IS COMPLETED, A SIGNATURE IS REQUIRED AT THE END OF THIS FORM
CS-SSO Form
Page: 1

PART II:
ANSWER THE FOLLOWING QUESTIONS FOR EACH RELATED CAUSE CHECKED IN PART I OF THIS FORM AND
INCLUDE THE APPROPRIATE DOCUMENTATION AS REQUIRED OR DESIRED
COMPLETE ONLY THOSE SECTONS PERTAINING TO THE CAUSE OF THE SSO AS CHECKED IN PART I
(In the check boxes below, NA = Not Applicable and NE = Not Evaluated)
A HARDCOPY OF THIS FORM SHOULD BE SUBMITTED TO THE APPROPRIATE DWR REGIONAL OFFICE UNLESS IS
Grease
When was the last time this specific line (or wet well) was cleaned?
10/27/20
Do you have an enforceable grease ordinance that requires new or retrofit of grease 7 Yes n No n NA n NE
traps/interceptors?
Have there been recent inspections and/or enforcement actions taken on nearby 7 Yes n No n NA n NE
restaurants or other nonresidential grease contributors?
Explain.
Grease trap inspection on 1/19/22
Have there been other SSOs or blockages in this area that were also caused by 7 Yes n No n NA n NE
grease?
When?
12/13/12
If yes, describe them:
unstopped sewer main due to raps and grease
Have cleaning and inspections ever been increased at this location? 7 Yes n No n NA n NE
Explain.
Grease trap inspection went for 1 year to every 30 days.
Have educational materials about grease been distributed in the past?
When?
and to whom?
Explain?
With our water bills and to all users
If the SSO occurred at a pump station, when was the wet well and pumps last
checked for grease accumulation?
7 Yes ❑ No ❑ NA ❑ NE
Were the floats clean? n Yes n No 7 NA n NE
CS-SSO Form Page: 2

Comments:
System Visitation
ORC
Backup
Name:
Nick Rogers
Cert#
998691
Date visited:
06/2/2022
Time visited:
03:00 PM
7 Yes
Yes
How was the SSO remediated (i.e. Stopped and cleaned up)?
Got a call that sewer was coming out of the customers cleanout and flowing down the street. We checked up stream and
the down stream manholes the flow was flowing good from the upstream and the down stream manhole was not flowing
good. So we took the flush truck to get the sewer line unplugged we were hitting something in the line and couldn't get it
broke loose se we went to the upstream manhole and ran the line down and broke the blockage loose and the sewer
stopped running out of the momma dips sewer clean out. We then went down stream of the storm main and found out we
the sewer stopped at we took two pumps and pumped out the creek and pumped it into the sewer main and ran fresh wa1
down the storm drain and got all the sewer up and the sample were clear of sewer.
As a representative for the responsible party, I certify that the information contained in this report is true and accurate to the
best of my knowledge.
Person submitting claim: Nicholas F Rogers Date: 06/23/22 03:00 pm
Signature: Title:
Telephone Number:
Any addition information desired to be submitted should be sent to the appropriate Division Regional Office within five days of 1
knowledge of the SSO with reference to the incident number (the incident number is only generated when electronic entry of th
form is completed, if used).
CS-SSO Form Page: 3

Attachment 3: 102 Creekside Lane Spill and Sample Map - Incident #202200948
c Upstream Sample Site
Spill Site (MH#18785)
This map contains sensitive information, not to be copied or
distributed without the express written permission of OWASA. This
data is being provided as a visual representation and at no time
should the data be considered exact. The data is not guaranteed to
be accurate and is not intended as a substitute for a field survey.
OWASA assumes no legal liability or responsibility for this data.
Spill Site (MH#242)
CREEKSIDE LN
Downstream Sample Site
Incident #202200948
06/21/22 ^ I
o Site of Interest
Manhole
O, Downstream Sample Site
��`° I I I I
Streams and Creeks
Sewer Main
0 25 50 100 Feet

Attachment 4
DWR
Division of Water Resources
State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
Collection System Sanitary Sewer Overflow Reporting Form
Form CS-SSO
PART I:
This form shall be submitted to the appropriate DWQ Regional Office within five business days of the first knowledge of the
sanitary sewer overflow (SSO).
Permit Number: WQCS00031 (WQCS# if active, otherwise use WQCSD#)
Facility: OWASA Collection System Incident #: 202200948
Owner: Orange Water and Sewer Authority
City: Carrboro County: Orange
Region: Raleigh
Source of SSO (check applicable): [ [ Sanitary Sewer ❑ Pump Station / Lift Station
SPECIFIC location of the SSO (be consistent in description from past reports or documentation - i.e. Pump Station 6,
Manhole at Westall & Bragg Street, etc): 102 Creekside Ln, Chapel Hill, North Carolina, 27514
Manhole #: 18785
Latitude (Decimal Degrees): Longitude (Decimal Degrees):
Incident Started Dt: 06/21/2022 Time: 9:15 am Incident End Dt: 06/21/2022 Time: 09:51 am
(mm-dd-yyyy) (hh:mm AM/PM) (mm-dd-yyyy) (hh:mm AM/PM)
Estimated Volume of the SSO: 2,520
gallons Estimated Duration (Round to nearest hour): 0:36 hours
Describe how the volume was determined: Picture Manual
Weather conditions during the SSO event: Dry
Did SSO reach surface waters? Q Yes ❑ No ❑ Unknown
Surface water name: Cedar Fork
Volume reaching surface waters (gals): 2520
Did the SSO result in a fish kill? ❑ Yes 0 No ❑ Unknown If Yes, what is the estimated number of fish killed?
SPECIFIC cause(s) of the SSO:
2 Vandalism
24 hour verbal notification (name of person contacted ): Stephanie Goss
2 DWR ❑ Emergency Mgmt Date (mm-dd-yyy): 06/21/2022 Time (hh:mm AM/PM): 12:44:00 pm
If an SSO is ongoing, please notify the appropriate Regional Office on a daily basis until SSO can be stopped.
Per G.S. 143-215.1C(b), the responsible party of a discharge of 1,000 or more of untreated wastewater to surface waters
shall issue a press release within 24-hours of first knowledge to all print and electronic news media providing general
coverage in the county where the discharge occurred. When 15,000 gallons or more of untreated wastewater enters surface
waters, a public notice shall be published within 10 days and proof of publication shall be provided to the Division within 30
days. Refer to the reference statute for further detail.
The Director, Division of Water Resources, may take enforcement action for SSOs that are required to be reported to
Division unless it is demonstrated that:
1) the discharge was cause by sever natural conditions and there were no feasible alternative to the discharge; or
2) the discharge was exceptional, unintentional, temporary and caused by factors beyond the reasonable control of the
Permittee and/or owner, and the discharge could not have been prevented by the exercise of reasonable control.
Part II must be completed to provide a justification claim for either of the above situations. This information will be the basis
WHETHER OR NOT PART III IS COMPLETED, A SIGNATURE IS REQUIRED AT THE END OF THIS FORM
CS-SSO Form
Page: 1

PART II:
ANSWER THE FOLLOWING QUESTIONS FOR EACH RELATED CAUSE CHECKED IN PART I OF THIS FORM AND
INCLUDE THE APPROPRIATE DOCUMENTATION AS REQUIRED OR DESIRED
COMPLETE ONLY THOSE SECTONS PERTAINING TO THE CAUSE OF THE SSO AS CHECKED IN PART I
(In the check boxes below, NA = Not Applicable and NE = Not Evaluated)
A HARDCOPY OF THIS FORM SHOULD BE SUBMITTED TO THE APPROPRIATE DWR REGIONAL OFFICE UNLESS IS
Vandalism
Provide police report number:
Was the site secured?
If Yes, how?
❑ Yes ❑ No 7 NA ❑ NE
Have there been previous problems with vandalism at the SSO location? ❑ Yes 17 No ❑ NA ❑ NE
If Yes, explain:
What security measures have been put in place to prevent similar occurrences in the ❑ Yes ❑ No ❑ NA 7 NE
future?
Comments:
System Visitation
ORC
Backup
Name:
Nick Rogers
Cert#
998691
Date visited:
06212022
Time visited:
10AM
7 Yes
❑ Yes
CS-SSO Form Page: 2

How was the SSO remediated (i.e. Stopped and cleaned up)?
OWASA was notified of a manhole overflowing by a passer-by citizen at 102 Creekside Ln, Upon arrival of OWASA crews
9:15 AM we found 2 manholes, MN 18785 and MH 242 overflowing. We attempted to clear the blockage using our Jetter
truck, but due to debris we were unable to clear the line. we then started to bypass pump and vacuum out of affected
manhole to stop the overflow. The overflow ceased at 9:36 AM. Upon vacuuming out the manhole we found a 42"x2" sticl
blocking the downstream outlet of the manhole causing the overflow, we remove the stick and flow resumed to normal
levels. We then proceeded to sample the stream above, at and below the spill site to determine the level of the spill. The
spill was contained to a short section of the stream. We set 2 portable pumps up in the stream and pumped about 28,800
gallons of contaminated water back into out sewer system and flushed the stream with clean hydrant water until we had u
detectable levels of sewage in the stream. Sample levels at 11:30 AM were upstream .015, midstream 12.84, downstrean
.112. At 2:PM levels were at upstream .365, midstream .369 and downstream .419.
As a representative for the responsible party, I certify that the information contained in this report is true and accurate to the
best of my knowledge.
Person submitting claim: Nicholas F Rogers Date: 06/23/22 08:00 am
Signature: Title:
Telephone Number:
Any addition information desired to be submitted should be sent to the appropriate Division Regional Office within five days of 1
knowledge of the SSO with reference to the incident number (the incident number is only generated when electronic entry of th
form is completed, if used).
CS-SSO Form Page: 3

Attachment 5: E Franklin Street Spill and Sample Map - Incident #202201004
This map contains sensitive information, not to be copied or
distributed without the express written permission of OWASA. This
data is being provided as a visual representation and at no time
should the data be considered exact. The data is not guaranteed to
be accurate and is not intended as a substitute for a field survey.
OWASA assumes no legal liability or responsibility for this data.
(T___
Downstream Sample Site
9I \ 1 I
Spill Site (MH#1885)
4 QO;'
Incident #202201004
06/28/22
0 Site of Interest
® Manhole
Streams and Creeks
= Sewer Main
125 250 500 Feet
.'T \:'.1111.7.714 ,,;

Attachment 6
DWR
Division of Water Resources
State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
Collection System Sanitary Sewer Overflow Reporting Form
Form CS-SSO
PART I:
This form shall be submitted to the appropriate DWQ Regional Office within five business days of the first knowledge of the
sanitary sewer overflow (SSO).
Permit Number: WQCS00031 (WQCS# if active, otherwise use WQCSD#)
Facility: OWASA Collection System Incident #: 202201004
Owner: Orange Water and Sewer Authority
City: Carrboro
County: Orange Region: Raleigh
Source of SSO (check applicable): [ [ Sanitary Sewer
❑ Pump Station / Lift Station
SPECIFIC location of the SSO (be consistent in description from past reports or documentation - i.e. Pump Station 6,
Manhole at Westall & Bragg Street, etc): E Franklin St, Chapel Hill
Manhole #: 1885
Latitude (Decimal Degrees): Longitude (Decimal Degrees):
Incident Started Dt: 06/28/2022 Time: 1:30 pm Incident End Dt: 06/28/2022 Time: 01:56 pm
(mm-dd-yyyy) (hh:mm AM/PM) (mm-dd-yyyy) (hh:mm AM/PM)
Estimated Volume of the SSO: 1,950 gallons Estimated Duration (Round to nearest hour): 0:26 hours
Describe how the volume was determined: Picture Manual
Weather conditions during the SSO event: Dry
Did SSO reach surface waters? 2 Yes ❑ No ❑ Unknown
Surface water name: Booker Creek
Volume reaching surface waters (gals): 1950
Did the SSO result in a fish kill? ❑ Yes 0 No ❑ Unknown If Yes, what is the estimated number of fish killed?
SPECIFIC cause(s) of the SSO:
2 Debris in line
24 hour verbal notification (name of person contacted ): Dorothy M Robson
2 DWR ❑ Emergency Mgmt Date (mm-dd-yyy): 06/29/2022 Time (hh:mm AM/PM): 12:45:00 pm
If an SSO is ongoing, please notify the appropriate Regional Office on a daily basis until SSO can be stopped.
Per G.S. 143-215.1C(b), the responsible party of a discharge of 1,000 or more of untreated wastewater to surface waters
shall issue a press release within 24-hours of first knowledge to all print and electronic news media providing general
coverage in the county where the discharge occurred. When 15,000 gallons or more of untreated wastewater enters surface
waters, a public notice shall be published within 10 days and proof of publication shall be provided to the Division within 30
days. Refer to the reference statute for further detail.
The Director, Division of Water Resources, may take enforcement action for SSOs that are required to be reported to
Division unless it is demonstrated that:
1) the discharge was cause by sever natural conditions and there were no feasible alternative to the discharge; or
2) the discharge was exceptional, unintentional, temporary and caused by factors beyond the reasonable control of the
Permittee and/or owner, and the discharge could not have been prevented by the exercise of reasonable control.
Part II must be completed to provide a justification claim for either of the above situations. This information will be the basis
WHETHER OR NOT PART III IS COMPLETED, A SIGNATURE IS REQUIRED AT THE END OF THIS FORM
CS-SSO Form
Page: 1

PART II:
ANSWER THE FOLLOWING QUESTIONS FOR EACH RELATED CAUSE CHECKED IN PART I OF THIS FORM AND
INCLUDE THE APPROPRIATE DOCUMENTATION AS REQUIRED OR DESIRED
COMPLETE ONLY THOSE SECTONS PERTAINING TO THE CAUSE OF THE SSO AS CHECKED IN PART I
(In the check boxes below, NA = Not Applicable and NE = Not Evaluated)
A HARDCOPY OF THIS FORM SHOULD BE SUBMITTED TO THE APPROPRIATE DWR REGIONAL OFFICE UNLESS IS
Debris in line
What type of debris has been found in the line?
Rags
Suspected cause or source of debris.
Possible new construction upstream
Are manholes in the area secure and intact? 7 Yes ❑ No ❑ NA ❑ NE
When was the area last checked/cleaned?
12/09/2020
Have cleaning and inspections ever been increased at this location due to previous ❑ Yes 7 No ❑ NA ❑ NE
problems with debris?
Explain:
Are appropriate educational materials being developed and distributed to prevent futi 7 Yes ❑ No ❑ NA ❑ NE
similar occurrences?
Comments:
Education materials are sent out with our sewer and water bills.
System Visitation
ORC ❑ Yes
Backup 7 Yes
Name:
Brett Bradshaw
Cert#
1003061
Date visited:
06/29/2022
Time visited:
08:OOAM
CS-SSO Form Page: 2

How was the SSO remediated (i.e. Stopped and cleaned up)?
We located the sewer overflow driving down the road and smelling it. After investigating we found MH1885 at 1:30 PM
overflowing into the ditch. We used our flush truck to unstop the blockage of rags and debris and stopped the flow of
sewage running into the ditch at 1:56 PM. We estimated that 75GPM was flowing for 26 min resulting in a spill of 1950
gallons. 1st samples were taken at site were 68.74 and downstream at S. Elliot Rd were .239. We flushed the affected ar(
with 23600 gallons clean water, we pumped the contaminated water from the storm sewer back into our sewer system an
sampled again downstream to ensure that we had acceptable levels. 2nd set of samples on Elliot Rd were .10.
As a representative for the responsible party, I certify that the information contained in this report is true and accurate to the
best of my knowledge.
Person submitting claim: Coyle Brett Bradshaw Date: 06/30/22 07:30 am
Signature: Title:
Telephone Number:
Any addition information desired to be submitted should be sent to the appropriate Division Regional Office within five days of 1
knowledge of the SSO with reference to the incident number (the incident number is only generated when electronic entry of th
form is completed, if used).
CS-SSO Form Page: 3