NC0020559_Report_20240723

North Carolina Department of Environment and Natural Resources
DWR
Division of Water Resources
WWTP Upset, Spill, or Bypass 5-Day Reporting Form
(Please Print or Type Use Attachments if Needed)
Permittee: _City of Henderson
Facility Name: _City of Henderson
Incident Started
Incident Ended
Level of Treatment:
Date: 7/18/2024
Date: 7/18/2024
Permit Number: _NC0020559
County: _Vance
Time: 1:30
Time: 3:30
_x_None _Primary Treatment _Secondary Treatment _Chlorination/Disinfection Only
Estimated Volume of Spill/Bypass: _374,000_
estimate)
Did the Spill/Bypass reach the Surface Waters?
If yes, please list the following:
Volume Reaching Surface Waters: _374,000_
Creek
(must be given even if it is a rough
_x_Yes No
Surface Water Name: _Nut bush
Did the Spill/Bypass result in a Fish Kill? Yes _x_No
Was WWTP compliant with permit requirements? Yes _x_No
Were samples taken during event? Yes _x No
Source of the Upset/Spill/Bypass (Location or Treatment Unit):
All of the wastewater bypassed the whole plant. Wastewater overflowed out of the influent bar screen.
Cause or Reason for the Upset/Spill/Bypass:
Due to power outage and the power wasn't able to transfer to generator.
Describe the Repairs Made or Actions Taken:
We replaced the UPS on both A and B side of our switch.
Spill/Bypass Reporting Form (August 2014)

North Carolina Department of Environment and Natural Resources
Spill/Bypass Reporting Form (August 2014)

WWTP Upset, Spill, or Bypass 5-Day Reporting Form
Page 2
Action Taken to Contain Spill, Clean Up and Remediate the Site (if applicable):
We were not able to contain the spill. We did do clean up, we picked up all debris and applied lime to ground
around influent.
Action Taken or Proposed to be Taken to Prevent Occurrences:
We will continue to run our Generator monthly to insure the power transfer properly.
Additional Comments About the Event:
See attached.
24-Hour Report Made To
Contact Name: Michael Hall
Division of Water Resources _x_ Emergency Management
Date: 7/18/2024
Other Agencies Notified (Health Dept, etc): _None
Time: 11:32am
Person Reporting Event: _Brandon Elliott Phone Number: _252-425-3681
Did DWR Request an Additional Written Report? _x_Yes No
If Yes, What Additional Information is Needed:
_Report of what happen and what was done to not let it happen again.
Spill/Bypass Reporting Form (August 2014)

On Thursday morning about 1:30am the Henderson
wastewater plant lost power. Our emergency
generator then turned on but our B side switch gear
did not transfer power, which caused the generator
to not run. The operator on duty called the on -call
mechanic person. The maintenance supervisor also
came inn. He arrived and tried to troubleshoot the
problem. At about 2am we call Gregory Poole to try
an assistant on the problem. He arrived at around
2:30am. He found that a breaker had tripped in
another area in the generator room. At this point the
generator was put on in manual and Emergency
power was restored around 3:20am. We calculated
that the plant spilled from 1:30 AM to 3:20 AM. We
calculated this by taking our two large pump stations
and taking the number of gallons they pump per
minute and times that by the amount of time we had
no power at the plant and that's how we came up
with the 374,000 gallons of spill. We believe utility
power was restored around 6:30 AM that is when we
transferred back regular utility power. Gregory Poole
returned to the plant to try an figure out why this
happen. He found that the UPS on B side may have
been the reason for the problem. This cause B side
not to hold power until the Generator came on. The

radiator for the generator is run off 6 side. This
caused the Generator to have a over temp and shut
down. To correct this, we have replaced both UPSs
on both switch gears. We have also tested the
generator by cutting off utility power. Everything
switched over correctly. We will continue to run our
generator monthly to ensure this doesn't happen
again.