WQCS00055_NOV-2020-DV-0245 Response_20200813

Water Quality Regional Operations Section glr �•,�,,r
Raleigh Regional Office .,:
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Raleigh, NC 27699-1628
Re: Response to Notice of Violation & Intent to Issue Civil Penalty
Tracking No. -- NOV-2020-DV-0245
Sanitary Sewer Overflows — April 2020
Henderson Collection System
Permit No. — WQCS00055
Dear Mr. Vinson:
I am writing in response to the above mentioned violation that we received on My 27, 2020. Cause and
actions taken for each incident are listed below.
Incident #202001130
The overflow in this event was due to debris in the line as a result of vandalism. We used our small
trailer jetter and our combo truck to try and clear the blockage. Our crews were unable to clear the
blockage that evening. We set up the City's 8" Godwin bypass pump from MH01406 to MH01400 so
that we could stop the SSO. With the pump in place and use of the combo truck we were able to pump
the surcharging manhole down to see the inverts. The culprit of the SSO was debris such as wood, brick
and asphalt blocking the flow in the mouth of the outlet pipe. All debris was removed and normal flow
was restored. We removed as much of the spoiled soil as possible and placed clean backfill around the
manhole. We also treated the affected area with lime as needed. Straw and grass seed was placed to
stabilize the area. To help prevent this from happening again in this area, we locked down several
manhole tops utilizing tar.
Incident #202001315
The overflow in this incident was due to inflow and infiltration during extended periods of heavy rainfall.
Once the rain event ended, the overflow subsided. Following the overflow we cleaned debris and placed
lime in the area as needed. Moving forward, Henderson City Council has approved a CIP project for an
EQ tank at the Sandy Creek Pump Station for fiscal year 2020-2021. The EQ tank will increase capacity at
the pump station during heavy rain events and help to prevent spills. This project is contingent on
Council allocating the funds for the project. The Council is expected to vote on allocating the funds for
this project at the next Council Meeting on September 14, 2020.
Thank you very much for the opportunity to respond. We take our responsibility to maintain compliance
for our collection system very seriously. I trust that you find the City's actions for compliance are
satisfactory. Please feel free to contact our staff or myself should you need any further information.

Sincerely,
/Owen
Assistant Public Works Director
Attachments: Work Order Detail — SSO —April Sth — Fox Pond Park
CC: Edward Terrell Blackmon, City Manager
Andy Perkinson, Public Works Director
Joey Long, Distribution & Collection System Supervisor— Collection System ORC
Christy Lipscomb, KLRWP Director/ORC, HWRF ORC
Teddy Felts, Chief Plant Operator
File

NCDept ofEnv1ronment
Work Order Detail arQunL'rs,
AUG 19 2020
100000163
Owner William Bailey
Status In Progress
Task Count 3
Progress 100.00%
Labor
$1,953.79
Equipment
$3,900.00
Material
$20.00
Other
$225.00
Total
$6,098.79
Task
Information
Task ID
Activity
Asset Priority
Status Total Cost
T011097
SSO
Sewer Manhole MHO1406 Important
Completed 000
T013582
Jetting/Rodding
Sewer Main SM00935 Important
Completed 4327.47
T013586
SSO Cleanup
Non -Asset None
Completed 1771.32
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Work Order Detail
100000163 William Bailey Public Works
Task Count: 3
Description: SSO - April 5th - Fox Pond Park
L—Jask Information.
In Progress 100.00% $6,098.79
T011097 SSO Sewer Manhole Important Completed $0.00
MHO1406
Notes: Received call from communications about an SSO behind Fox's Pond. Upon arrival, I documented
the SSO with video and pictures and called the ORC. BIMS incident report is attached. See Task #
T013582 for work performed
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Work Order Detail
Task ID Activity Asset Priority Status Total Cost
T013582 Jetting/Rodding Sewer Main SM00935 Important Completed $4,327.47
Notes: Received Call for surcharging manhole (MH011406) and determined main was blocked. Used trailer
jetter and vac/jet truck with no success. Called ORC and his crew to help with blockage and was
unable to clear the blockage that evening. Used 8" Godwin bypass pump to bypass sewer main
from MHO1406 to MHO1400 as a temporary fix to keep manhole from surcharging. Ran pump from
10 pm 4/5/2020 to 2 am 416120 as a precaution due to very light demand due to the school being
closed. Was also assisted with manpower from the wastewater treatment plant in set up/tear down.
On 416120 debris (including 2x4's, Bricks, & Asphalt) was pulled from the flow channel of MHO1406
and normal flow was restored.
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Work Order Detail
Task ID Activity Asset Priority Status Total
To13586 SSO Cleanup Non -Asset None Completed $1,771.32
Notes: Today we cleaned up the SSO. We used the backhoe to remove as much of the spoiled soil as
possible and hauled in fresh dirt. We treated the affected area with lime as needed. We planted
grass and put out straw to stabilize the area.
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