WQ0002708_More Information (Requested)_20210415

ROY COOPER
Governor
DIONNE DELLI-GATTI
Secretary
S. DANIEL SMITH
Director
NORTH CAROLINA
Environmental Quality
April 15, 2021
CHRIS PHELPS — WATER DIVISION MANAGER
CITY OF RALEIGH
POST OFFICE BOX 590
RALEIGH, NORTH CAROLINA 27602
Subject
Dear Mr. Phelps:
Application No. WQ0002708
Additional Information Request
Wrenn Road WWTF
Wastewater Irrigation System
Wake County
Division of Water Resources' Central and Regional staff has reviewed the application package
received March 22, 2021. 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 May 17, 2021.
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 Sections A through G, or failure to provide the additional information on or before the above requested
date may result in your application being returned as incomplete.
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 one
electronic copy submitted to my attention at the email address below.
If you have any questions regarding this request, please do not hesitate to contact me at (919) 707-
3627 or vivien.zhonR&ncdenr.gov. Thank you for your cooperation.
Sincerely,
D��ocu"S�igned by:
E42E88CDBD404A7...
Vivien Zhong, Environmental Engineer
Division of Water Resources
cc: Raleigh Regional Office, Water Quality Regional Operations Section (Electronic Copy)
Chris Brown, PE — HDR Engineering, Inc of the Carolinas (Electronic Copy)
Permit Application File WQ0002708
D ��� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
NCRTHCAROL3NA
oaweo�ori�mi a�.uq 919.707.9000

Mr. Chris Phelps
April 15, 2021
Page 2 of 3
A. Application Form WWIS 06-16:
1. The Form is not signed by the applicant on the last page. Mr. Chris Phelps is not a delegated
signature authority for this permit yet. Pursuant to 15A NCAC 02T .0106, please have an executive
officer or elected official complete the attached signature delegation letter before Mr. Chris Phelps
can sign the application. Otherwise, please update application form Section I and have the executive
office or elected official sign the application form.
The application rates listed under Section VIL8. are not consistent with the May 4, 2020 issued
permit. Please clarify and update the application form as needed.
B. Property Ownership Documentation:
1. No comments.
C. Engineering Plans:
1. No comments.
D. Specifications:
1. No comments.
E. Engineering Calculations:
1. The application rates used in the calculations are not consistent with the May 4, 2020 issued permit.
Please clarify and update the calculations as needed.
2. Please clarify whether the 662,216 gallons per day (GPD) is the design facility influent flow or the
long-term average influent flow.
F. Site Map:
On Sheet 1 of Attachment H, there are portions of Field 113, 613, 7A, and 7B within the spray buffer.
Please clarify.
2. According to the permit issued May 4, 2020, the existing monitoring well MW-3 is located north
of Field 613, while it showed up south of Field 3B on the site map. According to the same permit,
the existing MW-9 is located west of Field 7A, but it is not found on the site map. Please clarify.
PMW-1 and PMW-2 are close to MW-3 and PMW-3 is close to MW-9. Please clarify whether
PMW-1 through PMW-4 are proposed compliance monitoring wells or currently active wells as
indicated in the application form Section IV.10. to be added to the permit in addition to the existing
compliance monitoring wells MW-3, MW-8, and MW-9. If this is the case, please rename PMW-
1 through PMW-4 as MW-10 through MW-13 and reflect the names on the application form and
the site maps. Please also explain why PMW-1 through PMW-4 are outside of the compliance
boundary.

Mr. Chris Phelps
April 15, 2021
Page 3 of 3
4. Please create an overall site map with the proposed area removed, the review and compliance
boundaries indicated, all existing and proposed compliance monitoring wells indicated, and without
the sheet sections as shown on Sheet 1 of Attachment H.
G. Operation & Maintenance Plan:
1. No comments.