20200879 Ver 2_NCDWR- 7-Day Follow-Up Letter- Sediment-Laden Water Release 5-7-21_20210514

Dominion Energy North Carolina
800 Gaston Rd, Building A
Gastonia, NC 28056
DominionEnergyNC.com
May 14th, 2021
SUBMITTED BY ELECTRONIC MAIL
[e-mail]
Mr. Andrew Moore
Environmental Senior Specialist
Division of Water Resources
NC Department of Environmental Quality
2090 U.S. 70 Highway
Swannanoa, NC 28778-8211
Dominion
0 Energy
RE: Follow-up written submission - DENC Sediment -laden water release —T-072 Project
Dear Mr. Moore,
As required by the NC General Permit #01000, this 7-day letter is being provided to follow-up
on a sediment -laden water impact to Boring Mill Branch that occurred May 7, 2021, on the
Public Service of North Carolina, Inc., d/b/a Dominion Energy North Carolina (DENC) T-072
Project in Asheville, NC. Our DENC Environmental Compliance Coordinator verbally notified
your office of the incident at 12:06 PM (Asheville Regional Office) on May 7, 2021.
The release information and corrective actions are as follows:
• While open cutting Dry Ferry Road during pipeline installation, the pressure and
vibration from our contractor's equipment promoted an 8-inch water main to fracture in -
situ. The water main was located approximately seven (7) feet away from our
excavation.
• Upon further investigation, the water pipe fracture appears to have been caused by
improper installation practices given the shallow depth of the ductile iron water main, and
the pipe resting directly upon bedrock with no padding/bedding material.
• Due to the volume and flow rate from the damaged main, the sediment -laden water
flowed down Dry Ferry Road for approximately five hundred feet before entering Boring
Mill Branch.
• Sediment -laden water flowed to the branch from approximately 9:30 AM to 11:00 AM
until the City of Asheville could shut-off the line and make repairs.
If you have any questions or need additional information, please feel free to contact Josh
Przywara at [phone], or via email at [e-mail].

Ms. Andrew Moore
NCDEQ-DEMLR
Page 2
In order to support the national effort to stop the spread of the coronavirus (COVID-19) and to protect
our employees, Dominion Energy is directing employees who are able to perform their duties away from
their normal work locations to work remotely. Accordingly, filings that necessitate a physical mailing in
addition to the electronic submittal to satisfy your requirements will be delayed until our employees
return to their normal work locations. As this situation evolves, we may change our procedures as we
need to be flexible. We apologize for any inconvenience.
I certify under penalty of law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the
system, or those persons directly responsible for gathering and evaluating the information, the
information submitted is, to the best of my knowledge and belief true, accurate, and complete. I am
aware that there are significant penalties for submitting false information, including the possibility of fine
and imprisonment for knowing violations.
Sincerely,
Jason Ericson
Director, Environmental Services