WQ0030775_More Information Received_20220404

Initial Review
Reviewer
EADS\ndthornburg
Is this submittal an application? (Excluding additional information.) *
Yes No
If not an application what is the submittal type?* Annual Report
Residual Annual Report
Additional Information
Other
Permit Number (IR) * WQ0030775
Applicant/Permittee Aqua North Carolina, Inc.
Email Notifications
....... ........ ......... .........
Does this need review by the hydrogeologist? * Yes No
Regional Office
CO Reviewer
Admin Reviewer

Submittal Form
Project Contact Information
Please provide information on the person to be contacted by NDB Staff regarding electronic submittal, confirmation of receipt, and other correspondence.
............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Name* Jimmy
Email Address*
[e-mail]
Project Information
Application/Document Type*
New (Fee Required)
Modification - Major (Fee Required)
Renewal with Major Modification (Fee
Required)
Annual Report
Additional Information
Other
Phone Number*
7048412588
Modification - Minor
Renewal
GW-59, NDMR, NDMLR, NDAR-1,
N DAR-2
Residual Annual Report
Change of Ownership
We no longer accept these monitoring reports through this portal. Please click on the link below and it will take you to the correct form.
hftps://edocs.deq.nc.gov/Forms/NonDischarge_Monitoring_Report
Perm it Type:*
Wastewater Irrigation
High -Rate Infiltration
Other Wastewater
Reclaimed Water
Closed -Loop Recycle
Residuals
Single -Family Residence Wastewater
Other
Irrigation
Permit Number: *
WQ0030775
Has Current Existing permit number
Applicant/Permittee Address*
202 MacKenan Drive Cary, NC 27511
Facility Name*
Avendale WWTP
Please provide comments/notes on your current submittal below.
At this time, paper copies are no longer required. If you have any questions about what is required, please contact Nathaniel Thornburg
at [e-mail].
Please attach all information required or requested for this submittal to be reviewed here.
(Application Form, Engineering Plans, Specifications, Calculations, Etc.)
2022.04.04 Avendale WWTP Additional Information
4.75MB
Request #2 Submittal Package.pdf
Upload only 1 PDF document (less than 250 MB). Multiple documents must be combined into one PDF file unless file is larger
than upload limit.
* By checking this box, I acknowledge that I understand the application will not be
accepted for pre -review until the fee (if required) has been received by the Non -
Discharge Branch. Application fees must be submitted by check or money order and
made payable to the North Carolina Department of Environmental Quality (NCDEQ).
I also confirm that the uploaded document is a single PDF with all parts of the
application in correct order (as specified by the application).
Mail payment to:
NCDEQ — Division of Water Resources
Attn: Non -Discharge Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Signature
Submission Date 4/4/2022

v MCKIM&CREED
v
April 4, 2022
NCDEQ Division of Water Resources
Non -Discharge Branch
Archdale Building, 911, Floor
512 N. Salisbury St.
Raleigh, NC 27604
RE: Permit No. WQ0030775 Avendale WWTP
Additional Information Request #2
Pender County
High -Rate Infiltration System Minor Modification
To Ms. Plummer:
E N G I N E E R S
SURVEYORS
P L A N N E R S
M&C 04474-0021
Please find this as a response to your Additional Information Request #2 dated
March 4, 2022. The request was as follows:
➢ The partial hydraulic profile calculations show that the minimum
velocity requirement were not met. As indicated by the Engineer,
these minimum requirements are to prevent grit deposition in the
channel prior to the screen. The provided calculations were for
peak flow conditions which indicates that there is not a flow
condition that would allow for resuspension of the deposited
solids within the channel. Please provide clarification on the
hydraulics for the proposed modification and additional
information from the Engineer regarding what proposed to
address grit deposition concerns.
Venture IV Building The minimum velocity requirements are met for the proposed screen
1730 Varsity Drive modifications as the operation of the screens are a pumped through
screen, as the screen will only have flow through hit as the influent pump
Raleigh, NC 27606 station is operating, this will therefore create enough velocity through the
screen that deposition of solids will not occur. The influent pump station
is a duplex pump station with the design being one pump is operated as a
9 19 .2 3 3. 8 0 9 1 duty pump and the other is the standby redundant. Both pumps could be
run periodically in parallel to ensure the lines and screen remain flushed
Fax [phone]
www.mckimcreed.com

April 4, 2022
Page 2
and minimize the potential for solids deposition. We have also attached
revised partial hydraulic profile calculations as discussed.
Please do not hesitate to contact me should you have any questions or concerns.
We appreciate your time and consideration regarding this matter.
Sincerely,
McKIM & CREED, INC.
G�
Jam W Holland, P.E.
Process Group Leader
cc: Michael A. Melton, Engineering Manager, Aqua North Carolina, Inc.

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