WQ0007283_Additional Information Request #1_20231031

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS,]R.
Director
THE HONORABLE JAMES V. BENDER, JR.
TOWN OF POLLOCKSVILLE
POST OFFICE BOX 97
POLLOCKSVILLE, NORTH CAROLINA 28573
Dear Mayor Bender:
NORTH CAROLINA
Environmental Quality
October 31, 2023
Subject: Application No. WQ0007283
Additional Information Request #1
Town of Pollocksville WWTF
Wastewater Irrigation System
Jones County
Division of Water Resources' Central and Regional staff has reviewed the application package
received on August 23, 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 November
30, 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 Sections A through M, 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: htti)s://edocs.deci.nc.2ov/Fortns/NonDischar2_ e-Branch-
Submittal-Form-Ver2.
If you have any questions regarding this request, please contact me at [phone] or
[e-mail]. Thank you for your cooperation.
Sincerely,
DocuSigned by:
45A56104B4524E7...
Zachary J. Mega, Engineer III
Division of Water Resources
cc: Washington Regional Office, Water Quality Regional Operations Section (Electronic Copy)
Cecil G. Madden, Jr., PE — McDavid Associates, Inc. (Electronic Copy)
Laserfiche File (Electronic Copy)
Flo
Q 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
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The Honorable James V. Bender, Jr.
October 31, 2023
Page 2 of 5
A. Cover Letter:
The cover letter mentions the existing treatment lagoon will be repurposed to store final effluent
from the proposed biological nutrient removal (BNR) facility. Will the lagoon be cleaned (i.e.,
existing sludge build-up pumped out) before being utilized for final effluent storage? If this is not
done, the post -chlorination effluent could be recontaminated before spray field application and may
result in noncompliance. If the Contractor will perform this task, please revise the Engineering
Plans and Specifications as needed.
2. The cover letter also mentions that only the influent to the existing lagoon is planned to be sampled.
The effluent from the existing lagoon should be sampled as well just before irrigation since it is an
open -atmosphere structure. This will be representative of the wastewater quality being applied to
the spray fields. Please revise the Engineering Plans, Specifications, O&M Plan, and Form: WWIS
06-16 to reflect this.
B. Application Fee:
1. No comment.
C. Application (Form: WWIS 06-16):
1. Item IV.5. — The wastewater type was selected as "Domestic", however, the previous permit
renewal application that was submitted on March 17, 2021, noted a wastewater composition of 77%
domestic and 23% industrial. Please clarify what the influent wastewater composition (%) will be
to the proposed BNR facility. If any portion will be industrial, please submit a wastewater chemical
analysis per Instruction P of Form: WWIS 06-16 and 15A NCAC 02T .0504(h).
2. Item V. 1. — Only a portion of the estimated influent concentration and designed effluent
concentration parameters listed in this table are detailed in the Engineering Calculations. Please
revise the Engineering Calculations to clearly show (1) all estimated influent concentration
parameters, (2) hydraulic and pollutant loading calculations for each treatment unit, and (3) all
designed effluent concentration parameters as specific numbers (not ranges) per Instruction K of
Form: WWIS 06-16 and 15A NCAC 02T .0504(c)(3).
Item VA — "Yes" was selected for multiple pumps being provided wherever pumps are used,
however, multiple pumps are required per treatment train to meet 15A NCAC 02T .0505(k). Please
either revise the Engineering Plans, Specifications, Engineering Calculations, O&M Plan, and
Form: WWIS 06-16 for multiple pumps to be provided wherever pumps are used or demonstrate
that the current design meets the three Alternative Design Criteria (ADC) of 15A NCAC 02T
.0105(n).
4. Item V.11.e. —The listed length and volume for the chlorination pipes do not match the Engineering
Calculations. Please verify and revise.
5. Item V. I I .h. — Please add the proposed sampling station(s) to this table.
6. Item VII.3. — Please provide the minimum field observed distances for each setback parameter to
the treatment/storage units.
7. Item VII.4. —"No" was selected for complying with 15A NCAC 02T .0506(c) for reduced irrigation
setbacks to property lines, however, the table below was completed. Please clarify if the proposed
BNR facility will comply with 15A NCAC 02T .0506(c).

The Honorable James V. Bender, Jr.
October 31, 2023
Page 3 of 5
8. Section IX —Since "No" was selected for Items IX.1. and IX.2., Items IX.3. through IX.17. do not
apply to this facility. No response is reauired.
D. Property Ownership Documentation:
1. No comment.
E. Engineering Plans:
1. Sheets G8 & G9 — See Comment H.1.
2. Sheet G10 — Where does the 1.5" PVC meter vault sump pump force main discharge from/to? It
appears to stop at the invert of an existing drainage ditch and the meter vault is conveying
wastewater flow.
3. Sheet G14 —
a. Please depict and label the return activated sludge (RAS) and clarifier scum air lift pumps.
b. The profile view labels the aeration chambers as 42,500 gallons each but the notes below state
43,350 gallons. Please verify and revise.
F. Specifications:
1. Section 11391 (Package Steel BNR Sewage Treatment Plant) —
a. Will the Contractor be relocating the existing gas chlorine injection equipment to the proposed
chlorine contact piping? If so, please revise the Specifications to discuss this.
b. Part 107 (Performance and Design Requirements) — The listed total phosphorous (TP)
estimated influent concentration of 10 mg/L, designed effluent ammonia concentration of 1
mg/L (maximum), and designed effluent total nitrogen (TN) concentration of 6 mg/L do not
match Item V.I. of Form: WWIS 06-16 and the Engineering Calculations. Please verify and
revise.
c. Part 21 LD.1. (Aerobic Sludge Holding Chamber — Emergency Overflow) — A reference is
made to "high water in the digester chamber" when the holding chamber should be referenced.
Please verify and revise.
d. Part 216.D. (Mechanical Circular Clarifiers) — The listed minimum settling volume of 22,750
gallons does not match Item V.1 l.b. of Form: WWIS 06-16. Please verify and revise.
e. Part 216.R. (Mechanical Circular Clarifiers) — A 12" diameter outlet is listed, but the
Engineering Plans show a 6" diameter outlet from both clarifiers. Please verify and revise.
£ Part 217.13. (Return Sludge/Waste Sludge System) — The TDH for the RAS pumps is listed as
15' which does not match Item V.I Le. of Form: WWIS 06-16 and the Engineering Plans.
Please verify and revise.

The Honorable James V. Bender, Jr.
October 31, 2023
Page 4 of 5
G. Engineering Calculations:
1. Overall —
a. Please sign and date the Professional Engineer (PE) seal on the Engineering Calculations cover
page per Instruction K of Form: WWIS 06-16 and 15A NCAC 02T .0504(c)(3).
b. Please provide pump curves and a system curve analysis (if applicable) to identify the operating
point for all proposed pumps per Instruction K of Form: WWIS 06-16 and 15A NCAC 02T
.0504(c)(3).
c. Please provide buoyancy calculations for the meter vault since it will be constructed partially
or entirely below grade per Instruction K of Form: WWIS 06-16.
2. Aeration Design — The designed effluent ammonia concentration of 4 mg/L listed in the spreadsheet
does not match Item V.1. of Form: WWIS 06-16. Please verify and revise.
3. Secondary Clarifiers — Please provide friction/total dynamic head (TDH) calculations for the
clarifier scum pumps. See Comment G.1.b.
4. Disinfection by Chlorination Design — Please demonstrate that a minimum of 30 minutes of
chlorine contact time is achieved at Average Daily Flow (ADF). This should correspond to what
was listed under Item V.1 I.e. of Form: WWIS 06-16.
H. Site Map:
1. Please revise Sheets G8 and G9 of the Engineering Plans so they can serve as the Site Map(s) for
the modified facility per Instruction L of Form: WWIS 06-16 and 15A NCAC 02T .0504(d):
a. Please delineate and label the compliance and review boundaries per 15A NCAC 02L .0107
and 02L .0108, respectively.
b. Please show and label the location of all wells (including monitoring wells), streams
(ephemeral, intermittent, and perennial), springs, lakes, ponds, and other surface drainage
features within 500' of all wastewater treatment, storage, and irrigation sites.
c. Please provide applicable setback dimensions per 15A NCAC 02T .0506.
I. Power Reliability Plan:
1. No comment.
J. Operation & Maintenance Plan:
1. No comment.
K. Residuals Management Plan:
1. No comment.

The Honorable James V. Bender, Jr.
October 31, 2023
Page 5 of 5
L. Additional Documentation:
➢ Existing Permit:
1. No comment.
➢ Floodway Regulation Compliance:
1. No comment.
➢ Threatened or Endangered Aquatic Species Documentation:
1. Please submit documentation from the North Carolina Natural Heritage Program (NCNHP)
demonstrating the presence or absence of threatened or endangered aquatic species within the
boundary of the wastewater treatment, storage, and irrigation facilities per Instruction P of
Form: WWIS 06-16 and 15ANCAC 02T .0105(c)(10).
M. Recommendations (Response not required):
1. Engineering Plans —
a. Sheet G5 — Recommend revising the "Each Train" labels in the middle of the hydraulic profile
for clarity since this sheet is for peak flow single train operation.
b. Sheet G8 — Recommend fixing the text conflict in the top right corner of the sheet.