WQ0006317_More Information (Requested)_20230612

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
KYLE D. BOYAN — OPERATIONS MANAGER
COLONIAL PIPELINE COMPANY
411 GALLIMORE DAIRY ROAD
GREENSBORO, NORTH CAROLINA 27409
Dear Mr. Boyan:
NORTH CAROLINA
Environmental Quality
June 12, 2023
Subject: Application No. WQ0006317
Additional Information Request
Colonial Pipeline — Greensboro
Junction WWTF
Wastewater Irrigation System
Guilford County
Division of Water Resources' Central and Regional staff has reviewed the application package
received on April 21, 2023. However, additional information is required before the review may be
completed. Please address the items on the attached pages no later than the close of business on July 12,
2023
Please be aware that you are responsible for meeting all requirements set forth in North Carolina
rules and regulations. Any oversights that occurred in the review of the subject application package are
still the Applicant's responsibility. In addition, any omissions made in responding to the outstanding items
in Section A, or failure to provide the additional information on or before the above -requested date may
result in your application being returned as incomplete pursuant to 15A NCAC 02T .0107(e)(2).
Please reference the subject application number when providing the requested information. All
revised and/or additional documentation shall be signed, sealed, and dated (where needed), with an
electronic response submitted to my attention at: htt_ps:Hedocs.dea_.nc.e_ ov/Fonns/NonDischar2_ e-Branch-
Submittal-Form-Vert.
If you have any questions regarding this request, please contact me at [phone] or
[e-mail]. Thank you for your cooperation.
Sincerely,
Docu Si1g�nevd-b�yy
45A56104B4524E7...
Zachary J. Mega, Engineer II
Division of Water Resources
cc: Winston-Salem Regional Office, Water Quality Regional Operations Section (Electronic Copy)
Laserfiche File (Electronic Copy)
�D_E Q`J/ North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617
NORTH CAROLINA
OepaMlent of Environmental Duality 919.707.9000

Mr. Kyle D. Boyan
June 12, 2023
Page 2 of 2
A. Overall:
1. Please provide a closure plan for the removal of Zone 1. This closure plan should include, but not
be limited to demolition, erosion and sedimentation control, and site restoration. More detail should
be provided about the irrigation piping/spray head abandonment and pipe capping process.
The final permit will include a compliance schedule that requires a North Carolina licensed
Professional Engineer to provide an Engineering Certification for the proper closure of Zone 1 after
construction is complete.
2. Is there potential for the removal of the Zone 1 irrigation piping to raise the PSI in the remaining
irrigation piping for Zones 2 and 3 past their rated capacity? If so, please provide calculations
showing the capacity is not exceeded.
3. Please confirm the linear feet of the 3-inch distribution force main, the linear feet of the 4-inch
force main, and the number of spray heads to be removed so the facility description in the final
permit can be updated accordingly.
4. Caitlin Caudle of the Winston-Salem Regional Office noted in her Staff Report that wastewater
with a sodium adsorption ratio (SAR) of greater than 30 has been infrequently irrigated since March
2020 at this facility. Permittees that irrigate wastewater with a SAR of 10 or higher are required to
obtain recommendations from the local Cooperative Extension Office, the Department of
Agriculture and Consumer Services, the Natural Resource Conservation Service, a North Carolina
Licensed Soil Scientist, or an agronomist. The recommendations shall address the sodium
application rate, soil amendments (e.g., gypsum, etc.), or a mechanism for maintaining site integrity
and conditions conducive to crop growth. Please provide recommendations from one of the entities
listed above that addresses the high SAR wastewater being irrigated at this facility.