NC0021156_Report_20201113

From: Dow Shoutd
To: Bell, Wes; Tuvia, Ori A
Subject: [External] Re: Spill
Date: Friday, November 13, 2020 12:40:10 PM
Attachments: WWTP 5 day report 11-12-2020.pdf
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Wes,
I have included my report of the spill that occurred on the 12th of november 2020. If you
require a hard copy be mailed to you please let me know. I will include on so that he is aware
of the incident
Thank you for your assistance with this.
If you have any questions please contact me
On Fri, Nov 13, 2020 at 5:31 AM Doug Shoutd <doug.shoutd&mtholly.us> wrote:
Wes,
I am responding to you to let you know that yesterday after our talk about my city ditch spill
I did the calculations. I came up with 864 gallons came over the wall for the short period. I
will be sending you the report here shortly. Thank you for the help.
Doug Shoutd
Division Manager Of Wastewater
City of Mount Holly
P.O. Box 406
Mount Holly, NC 28120
Office: 704-827-4261
Doug Shoutd
Division Manager Of Wastewater
City of Mount Holly
P.O. Box 406
Mount Holly, NC 28120
Office: 704-827-4261
E
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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: Miles Braswell Permit Number: NC 0021156
Facility Name: City of Mount Holly WWTP County: Gaston
Incident Started: Date: 11-12-2020 Time: 1153
Incident Ended: Date: 11-12-2020 Time: 1223
Level of Treatment:
X None Primary Treatment _Secondary Treatment Chlorination/Disinfection Only
Estimated Volume of Spill/Bypass: 864 Gal (must be given even if it is a rough estimate)
Did the Spill/Bypass reach the Surface Waters? X Yes No
If yes, please list the following:
Volume Reaching Surface Waters: _Unknown / 864 , Surface Water Name: Catawba River
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? X Yes No
Source of the Upset/Spill/Bypass (Location or Treatment Unit):
City Ditch Influent Screen Area
Cause or Reason for the Upset/Spill/Bypass:
The plant received double the capacity of the plant capabilities for 8 hours. With extra equipment onsite to
help prevent this the amount of water from the rain fall overwhelmed the plant and the equipment. The plant
received 5.218 MGD for the day of the spill, not counting the flow pumped from the city ditch through the
diesel pump to keep city ditch from overflowing. The rainfall was a total of 3 inches in roughly 24 hrs. 2 inches
of that rain fell in a 3 hour period.
Describe the Repairs Made or Actions Taken:
No equipment repairs needed. The cause of the spill was the amount of water coming into the plant caused
by a large amount of rainfall in a short amount of time. The continued maintenance of the collection lines
would help with the I and I into the system, and help prevent surges of storm water in the future.
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 set up a bypass pump to assist the flow coming into the city ditch and stop the spill.
We cleaned and removed all the visible debris that were in the water and we are assessing the area for any
further clean up that may be necessary. Lime may be added to stabilize the affected area.
Action Taken or Proposed to be Taken to Prevent Occurrences:
More study's on Collection system repair needs to be assessed to prevent this amount of storm water to enter
the collection system.
Additional Comments About the Event:
The staff did everything possible to prevent this event from occurring and even with the extra equipment to
help pump the city ditch the amount of storm water was too much for the plant to handle in the short amount
of time the rain fell. The City ditch influent was not designed to handle the amount of water that flows through
it during a heavy storm in a short amount of time. Samples were pulled and river was checked up and down
stream for any abnormalities. Because of this rain event our DO was out of compliance.
24-Hour Report Made to: Division of Water Resources X Emergency Management
Contact Name: Wes Bell Date: 11-12-2020 Time:1320
Other Agencies Notified (Health Dept, etc):
Person Reporting Event: _Doug Shoutd Phone Number: _704-827-4261
Did DWR Request an Additional Written Report? X Yes No
If Yes, What Additional Information is Needed:
5 day report to be submitted, And Wes asked me to do the calculations quickly to determine the impact in
gallons to see the if we lost 1000 gal or more. If so we would need to get a press release out asap. We
lost 864 gallons during this event.
Spill/Bypass Reporting Form (August 2014)