WQ0042030_Additional Information Request_20210111

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
SHARON F. HAGGETT — PRESIDENT
SOUTHERN MAGNOLIA FARM, INC.
NORTH CAROLINA
Environmental Quality
January 11, 2021
POST OFFICE Box 15104
WILMINGTON, NORTH CAROLINA 28408-5104
Subject: Application No. WQ0042030
Additional Information Request
Southern Magnolia Farm WWTF
Wastewater Irrigation System
Craven County
Dear Ms. Haggett:
Division of Water Resources' Central and Regional staff has reviewed the application package
received October 14 ,2020. 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 February
10, 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 O, 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 two paper
copies and one electronic copy submitted to my attention at the address below.
If you have any questions regarding this request, please do not hesitate to contact me at (919) 707-
3659 or [e-mail]. Thank you for your cooperation.
Sincerely,
Erick Saunders, Engineer
Division of Water Resources
cc: Washington Regional Office, Water Quality Regional Operations Section (Electronic Copy)
Doug Haggett, PE — Haggett Engineering Associates, Inc. (Electronic Copy)
Permit Application File WQ0042030
D E Q�� 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
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Ms. Sharon F. Haggett
January 11, 2021
Page 2 of 3
A. Cover Letter:
1. No comments.
B. Application Fee:
1. No comments.
C. Wastewater Irrigation Systems Application (FORM: WWIS 06-16):
1. Application item VII.2 on page of the WWIS form indicates that there are not water movement
structures within 200 feet of the irrigation area. However, Figure 6 of the soils report reports an
existing swale located on three sides within 200 feet, with one section being proposed to be
removed. Please amend the first question in this item and provide a response to the second question.
2. Application item VII.7. provides a nitrogen uptake rate of 400 pounds per acre per year (lbs/ac-yr)
and a phosphorus uptake rate of 92 lbs/ac-yr for bermudagrass on Goldsboro and Lynchburg soil
series. The rates were obtained from NCSU AG-439-16W 2008, but this report does not appear to
be included in the application. The nitrogen and phosphorus uptake rates from the Realistic Year
Expectations (RYE) for North Carolina Soils provided by NCSU for bermudagrass in Craven
County are listed as is 230 and 61 lbs/ac-yr respectively on Goldsboro soils, and 172 and 48 lbs/ac-
yr on Lynchburg soils (https://realisticyields.ces.ncsu.edu/). Please provide justification for the
uptake rates provided in the application, or provide calculations proving that the site is not
agronomically limited at these lower uptake rates as per item VII.7.
D. Property Ownership Documentation:
1. No comments.
E. Soil Evaluation:
1. No comments.
F. Agronomist Evaluation:
1. See C.2.
G. Hydrogeologic Report:
1. N/A

Ms. Sharon F. Haggett
January 11, 2021
Page 3 of 3
H. Water Balance:
1. The water balance was not signed, sealed and dated by a qualified professional in accordance with
15A NCAC 02T .0504(k) and the Water Balance Calculation Policy. Please provide a cover letter
that satisfies the above criteria certifying the water balance received via email on October 28, 2020
from Doug Haggett.
I. Engineering Plans:
The proposed storage is —15,510 gallons (6,918 gallons from the irrigation chamber and 8,592
gallons from the irrigation pump station, per the engineering calculations), which is less than two
days of storage based upon the average daily flow of 9,480 GPD. While the water balance indicates
that no storage is required, the amount of proposed storage is insufficient given that 15A NCAC
02T .0505(x) prohibits irrigation during precipitation evens or wet conditions that would cause
runoff. Accordingly, provide either a minimum of 5 days of effluent storage (i.e., 47,400 gallons
of effective storage) pursuant to 15A NCAC 02T .0505(w), or propose an alternate storage volume
based upon daily precipitation data. The alternate storage volume needs to provide enough storage
based upon the longest observed continuous days of precipitation.
J. Specifications:
1. No comments.
K. Engineering Calculations:
1. See Item C.2.
2. See I.I. Changes to components will require calculations for those components.
L. Site Map:
1. No comments.
M. Power Reliability Plant:
1. No comments.
N. Operation & Maintenance Plan:
1. No comments.
O. Residuals Management Plan:
1. No comments.