WQ0045059_Comments_20240226

NORRIS & TUNSTALL
CONSULTING ENGINEERS P.C.
2602 Iron Gate Dr.Suite 102 1429 Ash-Little River Road
Wilmington,NC 28412 Ash,NC 28420
[phone] [phone]
[phone] Fax [phone] Fax
John S.Tunstall,P.E. J.Phillip Norris,P.E.
T.Jason Clark,P.E. Joseph K.Bland,P.E.
Robbie P.Hennelly,E.I.
RECENED
February 22, 2024
FEB 26 �024
H. Dale Crisp, P.E. NCDEQ/Dw
NC DEQ / DWR R/NPD ES
Water Quality Section — PERCS UNIT
512 N. Salisbury St.,
Archdale Bldg. 9th Floor Suite 925
Raleigh, NC 28604
Re: Review Comment Response
Brunswick County - Alegra LPSS Extension WQ0045059
Project Name: Alegra Sewer Extension
N&T Project No. 23094
Mr. Crisp,
We are responding to your emailed comments dated Monday, February 19, 2024, in red as
follows:
1. The proposed additional sewer flowrate requested in the permit application indicates
1,050 GPD based on 5 residential units (each 3 bedroom) at a flowrate of 210 GPD per
RDU. Please provide a copy of the design flow reduction approval letter for use of 210
GPD per RDU. For future reference, such approval letters are required to accompany
each permit application that is submitted to the Division for review if a reduced design
flowrate is proposed. The flow reduction letter is attached.
2. PE signed and sealed anti-floatation calculations were not submitted in support of the
notation on simple pump station sheet C8 of the engineering plans. Please provide.
Anti-Floatation calculations are attached.
3. PE signed and sealed pump station emergency storage calculations were not submitted
as required in support of the notation on simplex pump station sheet C8 of the
engineering plans and indicated on the permit application that 360 gallons of storage is
available during a power outage. Please provide. The simplex grinder stations will be
installed by Brunswick County Public Utilities as homes are built. They use a Standard
Barnes Grinder Pump Station that requires 360 gallons of storage above the pump on
level. The pre-approval submitted overview of equipment Barnes Grinder Pump Station
is attached which requires this storage.
NCBELS License C-3641

I`- . n r
H. Dale Crisp, P.E.
Review Comment Response
Alegra LPSS Extension WQ0045059
N&T Project No. 23094
February 22, 2024
Page 2
4. The proposed 2-inch pressure sewer crosses an existing 8-inch water main at
approximately Station 1+25, as shown on profile sheet C1.1. While there appears to be
adequate minimum vertical separation proposed between the two mains, please denote
/ label the proposed vertical separation on the engineering plans. The vertical
separation has been labeled and is shown on the attached plans.
A response to the above comments is considered required in order to proceed with the review
of the application and issuance of the permit. If a complete response is not received within 30
days, the application and supporting documents will be returned to you in accordance with 15A
NCAC 02T.0107(e)(2). We are responding within the 30 day response period for your
continued review. Please advise if anything additional is required.
Please feel free to provide digital copies of these revised documents and supporting
information to me via email along with hardcopies via mail. This response is being submitted
via email and hardcopies via Federal Express.
Thank you for your assistance with this project.
NORRIS & TUNSTALL
CONSULTING ENGINEERS, P.C.
/0 ' jauxii-A
. Phillip Norris, P.E.
J P N/ttw
23094 02-22-24 swr-Itr-peres resp
cc: Edson Alegra
NCBELS License C-3641
I

ROY COOPER
MICHAEL S. REGAN
eraW terR♦no rce�Tv LINDA CULPEPPER
Interim Director
May 23, 2018
Ann B. Hardy,County Manager
Brunswick County
P.O. Box 249
Bolivia, NC 28422
Subject: Adjusted Daily Sewage Flow Rate Approval
Brunswick County(WQCS00284)
Dear Ms. Hardy
On February 16, 2018,the Division of Water Resources (Division) initiated a review of the existing
Brunswick County flow reductions to develop a comprehensive flow reduction that would apply to all
permitted but not yet tributary residential connections and all future residential connections within the
Brunswick County service area. In accordance with 15A NCAC 02T .0114(f)(2),the Division has evaluated
the existing flow reductions as granted to various portions of Brunswick County,and based on input
from the Wilmington Regional Office as well as historical data for the county and the Division of Water
Infrastructure (DWI)guidance,the Division hereby approves for use by Brunswick County an adjusted
daily sewage design flow rate with the following conditions:
• The flow reduction is applicable to residential single family dwellings only.
• The minimum flow for 1 and 2 bedroom dwellings shall be 140 gallons per day.
• Each additional bedroom above two bedrooms shall increase the volume by 70 gallons per day
per bedroom (e.g.three bedroom homes shall utilize 210 gallons per day).
• This flow reduction shall not apply to sewer extension applications and/or permits for any other
public or private organizations whose wastewater flows are or might become tributary to
Brunswick County collection system(WQCS00284).
o The flow reduction may be applied to sewer extension applications and/or permits
where the permitted development shall be transferred to Brunswick County upon
completion.
• This flow reduction is only applicable for developments with flows tributary to the current
existing wastewater treatment facilities, and shall supersede any previous flow reductions
granted to developments tributary to the following treatment plants:
o Carolina Shores WWTP (NC0044873)
o Northeast Brunswick Regional WWTP (NC0086819)
o Shallotte WWTF (WQ000798)
o Ocean Isle Beach WWTF(WQ0006085)
C ornpares"
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919-807-6300

Brunswick County
WQCS00284
o Sea Trail WWTF(WQ0012748)
o West Brunswick Regional WRF(WQ0023693)
• Per 15A NCAC 02T.0114(e)(2),this flow reduction shall not apply to residential property on
barrier islands and similar communities located south or east of the Atlantic Intracoastal
Waterway used as a vacation rental as defined in G.S.42A-4.Such residences shall use 120
gallons per day per habitable room.
• Previous flow reductions as listed in the March 18, 2004 flow reduction approval for 904
Georgetown (185 GPD per 3-bedroom unit)and Bald Head Island (305 GPD per unit)shall
remain in place,as they do not connect to Brunswick County's collection system.
• This flow reduction must be reevaluated and approved by the Division prior to application to
any future Brunswick County treatment facilities.
Future sewer extension applications should be made using the flow reduction amount stated above. All
other aspects of the permitting process remain unchanged,and all applications must comply with the
statues, rules, regulations and minimum design criteria as certified by the owner and engineer.
Regardless of the adjusted design daily wastewater flow rate,at no time shall the wastewater flows
exceed the effluent limits as defined in the permit for the treatment facility or exceed the capacity of
the sewers downstream of any new sewer extension or service connection(s).
The granting of this flow reduction does not prohibit the Division from reopening, revoking, reissuing
and/or modifying the flow reduction as allowed by the laws, rules,and regulations contained in 15A
NCAC 02T, NCGS 143-215.1,or as needed to address changes in State and/or Federal regulations with
respect to wastewater collection systems, protection of surface waters and/or wastewater treatment.
If you have any questions,please contact Christyn Fertenbaugh, P.E.,at(919)807-6312,or via email at
[e-mail].
Sincerely,
-16)j*U---
for Linda Culpepper
Interim Director, Division of Water Resources
by Deborah Gore,Supervisor
Pretreatment, Emergency Response and Collection Systems Branch
Cc: William Pinnix, P.E., Brunswick County(William.Pinnixpbrunswickcountync.gov)
John Nichols, P.E., Brunswick County([e-mail])
Wilmington Regional Office, Water Quality Regional Operations
Central Files- Brunswick County Collection System (WQCS00284)
Central Files—NC0044873, NC0086819,WQ0000798,WQ0006085,WQ0012748,WQ0023693
PERCS(electronic copy)
Page2of2

Density Soil 115 lb/cf Project:Alegra Sewer Extension
Density Concrete 150 lb/cf NT#23094
Date:02-22-24
Well diameter 3.5 ft
Well depth 7.0 ft
Well Volume=7.0 x rr x 3.52 = 67.31 cf
Concrete Base Height 1.0 ft ' .•'Frc� � /,'',,'=
Concrete Lip Height _ 0.5 ft ' Q-O l-'4 - ._
Concrete Base Diameter 5.5 ft : ! -
�- = 966 t v)=
Base Volume= 1.0 x 7r x 2.752 = 23.75 cf 0 .
ti
Lip Volume=0.5 x n x(2.752 1.752)= 7.07 cf 2 c'I N�• "0 ,r'
A
rill_LIP
Total Base Volume 30.81 cf
�
Weight of Concrete 4621.69 lb 0 Z2Z io 7,4
Volume of Displaced Soil 98.13 cf l
Soil Volume=Base Vol.+Well Vol.
Volume of Soil above Base Lip 77.72 cf
Soil Lip Volume=5.5 x n x(2.752—1.752)
Weight of Soil above Base Lip 8937.23 lb
Bouyant Force of Soil Displaced 11284.38 lb
Bouyant Force=Vol.Soil Displaced x Soil Density
Total Weight of Components 13558.91 lb
Safety Factor 1.20
Stability OK!
IT
li
0
n 3.5' DIA.
GRINDER
PUMP TANK ` L
Il.11 r
C e L-J
a. I ra
f . 1. d
4. • .a a Na........_CONCRETE PER BRUNSWICK
..O a COUNTY REQUIREMENTS
FOR ANTI—FLOTATION
1 ° d
•[. 5.5' 1
TYPICAL RESIDENTIALGRIPDER PUMP DETAIL

1.
C -IRANE BARNES`
PRESSURE SYSTrI
PUMPS&SYSTEMS
Pre-Approval Submittal Overview of Equipment
For
Barnes TM Grinder Pump Stations
Project: County of Brunswick, North Carolina
Public Utilities Administration
Utilities Operation Center
Attn: Grinder Pump Station Packages
250 Grey Water Road NE
Supply, NC 28462
PH: 910-253-2681
Representative: Pumps, Parts, and Service, Inc.
9325 Forsyth Park Drive
Charlotte, NC 28273
PH: 704-588-6250
FX: 704-588-6258
Attn: Scott Dellinger
Prepared by: Crane Pumps & Systems, Inc.
Attn: Scott Krites, P.S. Applications
PH: 937-773-2772 ext 3044
3

County of Brunswick,NC
Technical Specifications
for
Grinder Pump Station Packages
REVIEWED
By Scott Krites at 10:32 am, Sep 01, 20 W
4

Tank
r s Tank- S+ah be constructed of High lhmily PelyeQi eue or pihcrpin6 Polyester Resin Lu wifhino:ad
nom ul expand to 150 perorate of ilia maximum external sail mad hydrostatic pressor!!.
11° Tank carnality dub barn Menke almayie of 140 ytiloss abiw tba pump on Wirt
Yea Tank base.Shull contain a sufficient collar to allow for tltc required nirti-flarlatitin kallap1.This clay be
eons-mused so that Ito,collar can he easily installed during'netallutioa.
un Tank top shall curtain art aluminum hrlch with access door to allow fru irn veliou iaei maintcnxme,ebo
llr abllira'io!oak tap with a sraodmd padlock fee safely.
'" Tank inlertlttl e dischar n elicit include Shutoff Valve,Check Valve and f 1:4"dischas
6 piping St Pipe
YE Trick shalt include a:winless stet°dilioray float brae mot 10 hang 3 floats and pump puwte card and a 2
NP't female electriical diseha^ge coupling located at the top side nf±anit.
Control Panel
.'s The cuntrut panel shntl be a NES1ls worrtigh:enelaaure with slanged 2ncl able aMv:r.
YES The parrcl stall hate lwc 15 amp single pole breakers far sepnrnte conuu:and alarm circuits, One INN)
polo breaker sized 10 pump full lard amps for eat pump,
f`9 Panel to haw n Visual A(a-art ntoua(d to the top of panel,wired to stay on until wet toed drape helot,
I:it;h rend bunt setting An audio alarm externally mounted with a push-to-.ciience Winos.
'YE-3 Mulur shatter shalt be designed for continuous operation and errripl'ed with dienrmt rn'ctltwds mud far
nnrmal current tend range. ELP.i7Et - c tau:rns aria r?JKr,4tilst'WtTWtt Td'e 1,IMR neaateL? Pon 71rs
ecaogt vr;,na':3 to?ND oG'; aaso.i tTicit e-�ca
seas Cruel rot seem design stud I be equipped PP`d to operate front Duns fxae level sensors.
r s Duplex.Pastel shall contain a manual emergency power transfer switch and gtneratlrr rcceptar..le:.An
unromatit p'ror'anknabbe phone dialer to iildhiic alarm paints for high Dave!.power lei and Control
ryaem faiittrc.
Grinder Pump
o a The grinder pump than he designed to he s ittwe far darnestr nasten,ater aervioe.
n�a Pump motor shall not=cad 2.HP said Lpernte 0 230-2240 votas 1 phase.
YYs (irinderassenablr Sheol be cunslttteted of slainteta sleet marerini and capable ormducing 01 components
in normal domestic sewage.
sine Puntpkince shall be provided with a rnechnnIeel shaft sal to prevent leakage between Gx mmoe Bed
pump.
r
REVIEWED
By Scott Kritces of 10:33 am,Sep 01,2010
A response to the above comments is considered required in order to proceed with the review of the application and
issuance of the permit. If a complete response is not received within 30 days,the application and supporting documents
will be returned to you in accordance with 15A NCAC 02T.0107(e)(2).
Please feel free to provide digital copies of these revised documents and supporting information to me via email along
with hardcopies via mail.
Please let me know if you have any questions. Dale
H. Dale Crisp, PE
Environmental Engineer II
Municipal Permitting Unit
NC Division of Water Resources
919-707-3603
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
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