WQ0040768_More Information (Received)_20190722

TRIPP ENGINEERING, P.C.
0 419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
July 17, 2019
NCDEQ/DWR
Water Quality Section
1617 Mail Service Center
Raleigh,NC 27699
Attn: Christyn Fertenbaugh,PE RECENED/NODEQ/DWR
Re: Meridian Forest JUL 4L i019
Permit No.WQ0040768
TE 17030 Water Quality
Permitting Section
Dear Christyn:
In response to your comments dated June 25,2019, we offer the following:
General Review:
1. Please provide a set of revised, final plans, specifications, and supplementary
documentation per the comments below on digital media(CD or other digital format
such as a flash drive) for our records.
tab Revised pi'ans3 specifications and suppl m+eiG°4: ty do an provided on D:
2. Please provide confirmation that all homes shall be 3-bedrooms, as the requested flow
is based on 210 GPD per lot. Fur future applications, this information should be
specified in Section VI(8)of the application.
e All homes are proposed as 3-bedroom.
3. The applicant is listed as being Brunswick County,but the application and provided
Developer's Operational Agreement appear to indicate that the developer should be
the applicant. Please clarify.
• Applicant is Brunswick County. Developer's Operational Agreement is not
necessary.
4. Please note that any projects which utilize a flow of less than 120 GPD per bedroom
(per 15A NCAC 02T.0114)must always be accompanied by a flow reduction approval
letter pertinent to that system.No response is required for this comment.
e Flow reduction as per previous Brunswick County/State agreement.

•
Calculations:
1. Please provide the following calculations,per 15A NCAC 02T.0305(b):
1. Buoyancy resistance.
• Bi toyane y calo iati ors are enclosed. Beast detailing has been added to
the plan.
2. Storage in the wet well above the pump-on position.
• 360 GPD in wet well above pump on position; calculations enclosed.
3. Downstream calculations for the receiving sewer, indicating that capacity is
available for this development. Please note that per 15A NCAC 02T.0304(g),
the FTSE is not equivalent to downstream calculations, and both must be
submitted for review.
* These lots are already permitted with the downstream pump station
WQ0031849. Supplemental information is enclosed for your use.
2. All design calculations must be signed/sealed/dated by a Professional Engineer,per
15A NCAC 02T.0305.
* MI calculations are signed, sealed and dated.
Plans/Specifications:
1. Please provide Section TS022.01 of the specifications, as referenced in the provided
TS021.01. It also appears that the pressure and leakage testing is not specified in the
provided specifications. Please provide the additional information as necessary,per
15A NCAC 02T.0305(b)(3).
• Additional specifications are enclosed,
2. The proposed low-pressure force main is indicated to cross a creek and associated
wetlands. Please provide information regarding the classification of the creek/wetlands
as well as whether the necessary 401 Certification(s)/404 Permit(s)have been applied
for,per 15A NCAC 02T.0305(c).
• The proposed water, sewer and storm drain crossings of th e wetlands are
being permitted within the USACOE roadway creasing till penanfts.
1. It is also not clear that the low-pressure force main shall be constructed to the
materials, testing methods, and acceptability standards meeting water main
standards at these crossings,per 15A NCAC 02T.0305(g)(5). Please revise to
provide a note stating this information.
• The low pr'essme sewer force main is SDR 21 PVC. A ductile iron
will be;installed followed by insertion of the low pressure main at each of
the 4 wetland crossings (please note the profile view). We have added a
note that all low pressure portions within the ductile iron encasenre,t will
be tested ern water main standards (150 psi for 2 hours with no leakage).

3. There did not appear to be a complete detail depiction for the proposed grinder pump
stations. Please revise the appropriate plan sheet(s)to include the following
information,per the 15A NCAC 02T.0305(h) and the Minimum Design Criteria:
* We have added a wore detailed pump station to the.&tal9 Shea
1. Audible and visual high-water alarm.
• Added audible and visual high-water alarm with NEMA 4x control panel.
2. Emergency contact placard/sticker information.
* Emergency contact placard/sticker to be attached to control pa 0:.
3. Sizing of the wet well, including 24-hours of storage above the "pump-on"
position(the general note regarding 24-hours storage is insufficient to verify
that there is 24-hours of storage above the"on"float level).
• Wet well calculations are enclosed with dimensions matching the detail and
providing 360 izallons above pump-on.
4. Buoyancy resistance (as confirmed by the calculations).
• Buoyancy calculations are enclosed.
5. Selected grinder pump,per lot.
• Grinder pumps shall be Crane Model No. OC-V 2 HP G; i nder with
230/240 volt single-phase power
Please review for approval and contact us with any questions, comments or if you need
additional information. Thank you.
Sincerely,6Tr'c ; Engineer'ng,P.C.
P 1 i ip G. T 'pp, 4.
PGT:dcb
Enc.

State of North Carolina
DW R Department of Environmental Quality
Division of Water Resources
_•—• 15A NCAC 02T.0300—ALTERNATIVE SEWEREXTENSION APPLICATION
'Division of Water Resources ASEA 04-16&SUPPORTING DOCUMENTATION
Application Number: (to be completed by DWR)
I. APPLICANT INFORMATION:
1. Applicant's name:Brunswick County(company,municipality,HOA,utility,etc.)
2. Applicant type: ❑ Individual ❑Corporation ❑ General Partnership ❑Privately-Owned Public Utility
❑Federal ❑ State ❑Municipal ®County
3. Signatureauthority's name: William L.Pinnix,PE per 15A NCAC 02T.0106(b)
Title:Director of Engineering
4. Applicant's mailing address: P.O.Box 249
City: Bolivia State:NC Zip:28422-
5. Applicant's contact information:
Phone number:[phone] Email Address: William.Pinnix(n,brunswickcountync.gov
II. PROJECT INFORMATION:
1. Project name:Meridian Forest
2. Application/Project status: ®Proposed(New Permit) ❑Existing Permit/Project
If a modification,provide the existing permit number: WQ00 and issued date:
If new construction but part of a master plan,provide the existing permit number: WQ00
3. County where project is located:Brunswick
4. Approximate Coordinates(Decimal Degrees):Latitude: 33.991666° Longitude: -78.211944°
III. CONSULTANT INFORMATION:
1. Professional Engineer:Phillip G.Tripp License Number: 17374
Firm:Tripp Engineering
Mailing address:419 Chestnut Street
City: Wilmington State:NC Zip:28401-
Phone number:[phone] Email Address: [e-mail]
IV. WASTEWATER TREATMENT FACILITY(WWTF)INFORMATION:
1. Facility Name:West Brunswick Regional WWTF Permit Number: W00023693
Owner Name:Brunswick County
V. RECEIVING DOWNSTREAM SEWER INFORMATION:
1. Permit Number(s):W00031849
System Wide Collection System Permit Number(s): WQCS00284
Owner Name(s):Brunswick County
FORM:ASEA 04-16 Page 1 of 5

VI. GENERAL REQUIREMENTS
1. If the Applicant is a Privately-Owned Public Utility,has a Certificate of Public Convenience and Necessity been submitted?
❑ Yes [No EN/A
2. If the Applicant is a Developer of lots to be sold,has a Developer's Operational Agreement(FORM:DEV)been submitted?
® Yes ❑No ❑N/A
3. If the Applicant is a Home/Property Owners'Association,has an Operational Agreement(FORM: HOA)been submitted?
❑ Yes [No ®N/A
4. Origin of wastewater:(check all that apply):
®Residential Owned ❑Retail(stores,centers,malls) ❑Car Wash
❑Residential Leased ['Retail with food preparation/service ❑Hotel and/or Motels
❑ School/preschool/day care ['Medical/dental/veterinary facilities ['Swimming Pool/Clubhouse
['Food and drink facilities ['Church ❑Swimming Pool/Filter Backwash
❑Businesses/offices/factories [Nursing Home ❑Other(Explain in Attachment)
5. Is/was an Environmental Assessment required under 15A NCAC 01 C? ❑ Yes ®No
If yes,submit the appropriate final environmental document(FONSI,ROD,etc.)
6. Nature of wastewater:100%Domestic/Commercial %Other waste—specify:
%Industrial(See 15A NCAC 02T.0103(20))
7. Wastewater generated by project: 13,860 GPD(per 15A NCAC 02T.0114)
Has a flow reduction been approved under 15A NCAC 02T.0114(f)? ®Yes ❑No
If yes,provide a copy of approval
8. Summarize wastewater generated by project:
Establishment Type Daily Design Flow a No.of Unitsf Flow
3-bedroom single family residential 210 gal/lot 66 13,860 GPD
gal/ GPD
gal/ GPD
gal/ GPD
gal/ GPD
gal/ GPD
Total 13,860 GPD
a See 15A NCAC 02T .0114(b), (d),(e)(1)and(e)(2) for caveats to wastewater design flow rates(i.e.,minimum flow per
dwelling; proposed unknown non-residential development uses; public access facilities located near high public use
areas; and residential property located south or east of the Atlantic Intracoastal Waterway to be used as vacation rentals
as defined in G.S.42A-4).
b Per 15A NCAC 02T .0114(c), design flow rates for establishments not identified below shall be determined using
available flow data,water using fixtures,occupancy or operation patterns,and other measured data.
FORM: ASEA 04-16 Page 2 of 5

Date Job Design Sheet
'1•Ft TRIPP ENGINEERING, P.C. Fume 9rionakt Bliormtl .A.tte, Pur of t
419 Chestnut Street For Check Job No.
Wilmington,North Carolina 28401
41 Et 04.3 Few ‘7031=,
Y1
C.A. s
- :-....""4.'1-*°SEES-SA Li ' .:.//1-7-i- '
37
z- -UPLicr ---- -(14001 --Cdenetc*_ _11.tuf.infirrhq _ .
\ .EGC `a•o �
xi: )k4 _'OP/
-
'� ; - - -
,t - -
�t R�"ott - _Atli 4- )pc 6.o,- T � �1Pr '
- 36`21("i i PI)*(tPco, C) "0-- ,_ '. z4 45 tb5 i ' . , , _ --
- -use 4.�i, ' - , a c ' -4, - - - _ Atwa : :14,A. rr�L ; _ : „,r _ a1e ?
- -f I -- - -- F - - ' , !-11 .4 (V6'C?) - , ' ' ' T - i 0-a! L
, _. , , _(Tr, ovs-r_ s,o.e..-)_
�•
-1 �®Nt = .6a-tom -,---- ' _ . . _- ., _ _
= ; p 61=, ;- Is/ - ; ! ; ,

Date Job Design Sheet
/•a•1ct TRIPP ENGINEERING, P.C. Pump 5mcno4 .Va.. %T Of c
419 Chestnut Street For Check Job No.
Wilmington,North Carolina 28401
. - , .
. . . . .
_ _ _ r _ _ .
. , .
_ _ . _ ___ _ _
_ ,__
. , ,
_ _ _ _ , .. __ ___
. .
_. _ _ _
A&bpi.... totii7,-- ricar,
iC( q
,
- I %k I """L' :1- - __beau, .,-
- CIO or
' f .�.► ,
Ara/FP ;
- ----- ----- ---- --- -- - ---- - - - - - - - --- - -- - --- ----- --- --- - ---- - - - - -- -- --- - - ---- --
- - ---Ib-" - - - =
R
- - -, '- = ; SEAL ;
, ik: , - i - _ _ .._
,� $c.
A , RE''r'+ � --

Date Job Design Sheet
1•41•P+ TRIPP ENGINEERING, P.C. 14.611thtok Caccv:a7n04.) Par- Of I
419 Chestnut Street For Check Job No.
Wilmington,North Carolina 28401
Alt 0-110i4..) fit' ri c S a
, 7 f CO iP7 7 tOWAC II 7 '1"1 ' Z44 i'diZ 'D ' 02 Z- GIP Nti) - - -----'-
- - --- --- - - - - - - - - --- --- - - - - - -- - - - - - -
W c y4ct-- - ; !1Y u 4JOPP4fseci4 - , ' 4 01 - - :-li t40 6 P
= -- - Id-C� 0031680_ _ _ �y0 V 1vty i - --(per f�1 -'_
-- - - - - - - - -- WQ- 00313l-1, - - -=Lea Ockk,s , i
_ _ - , is
,
,
' - = < - - - - : trai,:;- -fah: . .PP rT ,t - ;c; s --- ;Po err= _- ; - -__ , = ._.
- _ - _ _ �a;072. 6« _ :gip GPc; q e
,
_ - _ -_ . - �``� N OAR {`i/.0 ; , _ _ _
O -r••• i•
- me: :4 ' SEAL '
i �p GR GC�� �4. to
,

JUNE 26, 2019
TECHNICAL SPECIFICATIONS
MERIDIAN FOREST
SEWER EXTENSION
BRUNSWICK COUNTY, NC
evo,tim,
CIVIL ENGINEERING ®oo'��N CqR°
TRIPP ENGINEERING, PC ;Q4 'yam�, v
419 Chestnut Street
SEAL i
Wilmington, NC 28401 os:. 17374 =Qa�
Tel: [phone] 0:���N�E;
Fax: [phone] �® . • .�®`
NC License No C-1427 it
°ot{±G�
Phi ip . = •, •r
(Email: ptrip•@ec.r om)
Specification Title Specification Number & Version
As-Built Drawings TS 010.01
Excavating, Grading, Trenching, & Backfilling TS 013.01
Boring and Jacking TS 014.01
Low Pressure Sewer Systems & Grinder Pumps TS 021.01
Wastewater Force Mains TS 022.01
Electronic Marker Balls TS 035.01
IRECEIVED/NCDEQ/DWI
JUL 222019
Water Quality
Permitting Section

May 2019 Brunswick County Engineering Department Revision 1.07
Technical Specification 022.01
WASTEWATER FORCE MAINS
1.0 General
t'
a) It is the intent of this specification to provide technical guidance for the proper
material selection and installation for all waste water force mains that are installed
in the service area of the Brunswick County Public Utilities Department.
` b) The design engineer should have a thorough understanding of the North Carolina
DENR/DWQ document "Minimum Design Criteria for the Fast Track
Permitting of Pump Stations and Force Mains" in order to ensure state rules are
met for force main design.
c) Refer to Design Section Part D of this Brunswick County Engineering Design
Manual, Technical Specification and Standard Details for Water and Sewer
Systems for design guidance for waste water force mains permitted and
constructed in the service area of Brunswick County Public Utilities.
d) Except when necessary in making connections to other lines the contractor shall
install all force main piping with the pipe bells facing in the direction of flow such
that the fluid flows over the spigot end of the pipe, and not against the spigot end
of a pipe,within the bell-and-spigot assembly.
2.0 Materials for Construction
a) All materials used for force main construction shall be of good quality and, to the
maximum extent possible, manufactured in the United States. Any materials
deemed unsuitable by county staff or the Engineer shall not be used by the
contractor.
3.0 References
a) ASTM D1784 — Rigid PVC Compounds and Chlorinated PVC (CPVC)
compounds
I
b) ASTM D1785 -PVC plastic pipe, schedules 40, 80 and 120
c) ASTM D2241 -Poly(Vinyl Chloride) (PVC)plastic pipe (SDR-PR)
d) ASTM D3139 -Joints for plastic pipe using elastomeric seals
e) ASTM F477 -Elastomeric seals for jointing plastic pipe
f) ASTM D2467—Socket Type PVC plastic pipe fittings - Schedule 80
g) ANSI/AWWA C151 /A21.51 —Ductile Iron Pipe (DIP)
TS 022.01

May 2019 Brunswick County Engineering Department Revision 1.07
h) AWWA C600—Standard for Installation of Ductile Iron Pipe(DIP)
i) AWWA C605 _- Standard for Installation of Polyvinyl Chloride Pipe (PVC)
4.0 Pipe Materials
a) Force main piping shall be: 1‘.
1) 4— 12 inches: Polyvinyl Chloride (PVC), AWWA C900, DR-18 minimum
2) Larger than 12-inch: Polyvinyl Chloride (PVC), AWWA C905, DR-18
minimum
3) Ductile Iron Pipe, (DIP), ANSI/AWWA C150/A21.50, ANSI/AWWA
C151/A21.51 (only with express written permission of Brunswick County
Utilities or Engineering Department)
4) Fusible Polyvinyl Chloride, (FPVC), ASTM cell classification 12454,
Fusible C900 with minimum DR 18 for 4 — 12-inch diameter; Fusible
C905 with minimum DR 18 for 14 —24-inch diameter; Fusible C905 with
DR 25 for 30-inch diameter; Fusible C905 with DR 32.5 for 36-inch
diameter
5) High Density Polyethylene, (HDPE), PE 4710, ASTM D2239, minimum
DR-9
6) Polyvinyl Chloride(PVC), Schedules 40 and 80,ASTM D1785.
b) Minimum force main piping size: 4 inch (unless approved Low Pressure Sewer).
c) Low pressure sewer system force main piping size: 2 inches through 4 inches
shall be minimum SDR-21. Refer to`Technical Specification TS021.01: Low
Pressure Sewer Systems with Grinder Pumps.
d) DIP shall be lined internally with Protecto 401 ceramic epoxy lining or approved
equal for internal corrosion resistance.
e) DIP shall have an exterior bituminous asphaltic coating for corrosion resistivity.
f) DIP pressure class per pipe size shall be:
Pipe Size (inches) Pressure Class (psi)
4 - 12 350
14 -20 250
24- 64 200
g) PVC sewer force main piping shall be factory dyed industry standard green to aid
in field identification. PVC reuse effluent transmission piping shall be factory
dyed industry standard purple to aid in field identification. HDPE piping shall
TS 022.01

. May 2019 Brunswick County Engineering Department Revision 1.07
have a factory applied green strip. All pipe used for force main construction shall
be labeled or otherwise identified as conveying wastewater per NCDENR
"Minimum Design Criteria for the Fast Track Permitting of Pump Stations and
Force Mains".
h) HDPE pipe shall conform to ASTM D3035 and ASTM F714 with PE 4710
material
i) HDPE force mains shall be joined by the thermal butt fusion method in
accordance with ASTM A2657 and the manufacturer's installation
recommendations.
j) Fusible PVC force mains shall be joined by the thermal butt fusion method in
accordance with ASTM D638 and the manufacturer's installation
recommendations.
k) All piping shall be clearly marked with Manufacturer, Type, Pressure Class
and/or DR number, and date of production.
1) Avoid prolonged exposure of PVC and Fusible PVC piping to ultraviolet (UV)
exposure. Any piping obviously"dulled" in color due to prolonged sun exposure
shall be not be used.
m) All PVC force main piping installed within the NCDOT rights-of-way shall be a
minimum DR-18 rated pipe.
5.0 Materials and Requirements for Restrained Joints, Piping, and Fittings
a) Restrained joints are required to prevent movement of system piping caused by
forces in or on buried piping, tees,valves,branches,bends,plugs, etc.
b) Restrained joints shall be installed as shown on the approved plans, standard
details, or as directed by county staff or the Engineer.
c) Concrete thrust blocking shall be installed as shown on the approved plans,
standard details, or as directed by county staff or the Engineer.
d) All carrier pipe installed inside a casing shall be pressure class 350 ductile iron
pipes per county standard details with restrained joints.
e) All restrained joint systems shall have a pressure rating equal to or greater than
that of the pipe on which they are installed.
f) Restraint type gaskets that provide internal restraint by means of stainless-steel
inserts embedded within the gasket are not permitted for use in Brunswick
County.
g) Ductile Iron Pipe(DIP)
1) Must have written permission of county staff to use DIP
2)
TS 022.01

May 2019 Brunswick County Engineering Department Revision 1.07
2) Install restraints in strict accordance with the manufacturer's
recommendations.
3) All ductile iron horizontal directional drill and bore-and-jack installations
shall use boltless, integral, positive locking restraint systems that allow for
joint deflection and disassembly should the need arise. The restrained
joint system shall be a manufacturer's standard restrained joint system
such as American (Flex-Ring or Lok-Ring), U S Pipe (TR-Flex), or
Griffin(Snap-Lok), or approved equal.
Note: the boltless, integral, positive locking restraint systems are also
acceptable for use in open cut pipe installations.
4) External bell restraint harness shall have ductile iron glands. The
dimensions of the gland shall be such that it can be used with the standard
mechanical joint bell. Twist off nuts with preset factory torque setting
shall be used to ensure proper actuation of the restraint device. All nuts,
bolts, and fasteners shall be high strength alloy steel. Mechanical joint
restraints shall conform to ANSUAWWA A21.11/C111 and
ANSUAWWA A21.53/C153, latest revision.
The restrained joint system shall be a manufacturer's standard restrained
joint system manufactured by EBAA Iron, Inc., Smith-Blair, Inc.,JCM,
Inc., or approved equal.
5) Restraint for valves and fittings shall have ductile iron glands. Twist off
nuts with preset factory torque setting shall be used to ensure proper
actuation of the restraint device. All nuts, bolts, and fasteners shall be
high strength alloy steel. Mechanical joint restraints shall conform to
ANSUAWWA A21.11/C111 and ANSUAWWA A21.53/C153, latest
revision.
The restrained joint system shall be a manufacturer's standard restrained
joint system manufactured by EBAA Iron, Inc., Smith-Blair, Inc., JCM,
Inc., or approved equal.
6) Stainless steel rodding and fasteners, Type 304 minimum, is acceptable
per county standard details. Manufacturer's restraint system and/or glands
are preferred in lieu of rodding.
h) Polyvinyl Chloride Pipe (PVC)
1) Install restraints in strict accordance with the manufacturer's
recommendations.
2) External bell restraint harness shall have ductile iron glands. The
dimensions of the gland shall be such that it can be used with the standard
mechanical joint bell. Twist off nuts with preset factory torque setting
shall be used to ensure proper actuation of the restraint device. All
nuts, bolts, and fasteners shall be high strength alloy steel.
Mechanical joint restraints shall conform to ANSI/AWWA A21.11/
TS 022.01

May 2019 Brunswick County Engineering Department Revision 1.07
C111 and ANSI/AWWA A21.53/C153, latest revision.
The restrained joint system shall be a manufacturer's standard restrained
joint system manufactured by EBAA Iron, Inc., Smith-Blair, Inc., JCM,
Inc., or approved equal.
3) Restraint for valves and fittings shall have ductile iron glands. Twist off
nuts with preset factory torque setting shall be used to ensure proper
actuation of the restraint device. All nuts, bolts, and fasteners shall be
high strength alloy steel.
Mechanical joint restraints shall conform to ANSI/AWWA A21.11/C111
and ANSI/AWWA A21.53/C153, latest revision.
The restrained joint system shall be a manufacturer's standard restrained
joint system manufactured by EBAA Iron, Inc., Smith-Blair, Inc., JCM,
Inc., or approved equal.
4) Stainless steel rodding and fasteners, Type 304 minimum, is acceptable
per county standard details. Manufacturer's restraint system and/or glands
are preferred in lieu of rodding.
6.0 Push On, Mechanical, and Flanged Pipe Joints
a) DIP joints (all joints shall have a minimum two hundred (200) psi pressure rating
or be equal to the pressure rating of the pipe):
1) Push on joints with elastomeric gaskets shall conform to ANSI A21.11 /
AWWA C111. Joints shall be the integral bell and spigot type connection.
Gaskets shall be factory installed integral with the bell joint.
2) Mechanical joints shall conform to AWWA C111. Bolts shall be high
strength alloy steel per AWWA C111.
3) Flanged joints shall conform to ANSI A21.11 / AWWA C115. Bolts shall
be high strength alloy steel per AWWA C111.
b) PVC joints (all joints shall have a minimum one hundred fifty (150) psi pressure
rating or be equal to the pressure rating of the pipe):
1) Push on joints with elastomeric gaskets conforming to ASTM D3139 and
ASTM F477. Joints shall be the integral bell and spigot type connection.
Gaskets shall be factory installed integral with the bell joint.
7.0 Fittings and Specials
a) Fittings and specials shall be class 54 ductile iron, mechanical joint in accordance
with ANSI/AWWA C111/A21.11, ANSI/AWWA CI53/A21.53, with a (200)
pounds per square inch minimum pressure rating unless otherwise shown or
specified. Ductile iron fittings and specials shall be lined on the interior with
ceramic epoxy Protecto 401 or equal and coated on the exterior with a
TS 022.01

May 2019 Brunswick County Engineering Department Revision 1.07
bituminous asphaltic coating for corrosion resistivity.
b) Provide adaptor glands, gaskets, etc, as required to accommodate any differences
in pipe and fitting dimensions.
c) Fittings and specials for HDPE and Fusible PVC shall conform to all applicable
ASTM D3261 (HDPE) and other ASTM specifications and all manufacturers'
recommendations.
d) In corrosive soils sacrificial corrosion anodes and/ or poly wrap shall be required
around ductile iron pipe and DIP fittings at the direction of either county staff and
/or the engineer.
8.0 Gate Valves
a) Cast iron body, bronze mounted, double disc, resilient seated in conformance with
AWWA C509 or C515, with a minimum working pressure of one hundred fifty
(150)psi. Valves shall have a two (2) inch operating nut and open left, and
shall have 0-ring seals. Valve ends shall be mechanical joint or push on
joint. Gate valves shall be installed in the upright vertical position. Valves
shall be manufactured by Mueller, American Darling, Clow Corporation,
or approved equal.
b) Resilient gate valves may be used for tapping an existing, active force main.
c) All force main gate valves shall be set true and plumb and have a valve box
centered over the valve per county standard detail.
d) To the maximum extent possible all gate valves shall be located outside of roads,
streets, driveways, and other paved areas.
e) Earth fill shall be carefully tamped around each valve box to a distance of four(4)
feet on all sides of the box, or to the undisturbed trench face if less than four (4)
feet from the valve box.
9.0 Plug Valves
a) Non-lubricated eccentric type with resilient faced plugs, furnished with flanged
joint connections, port areas for valves through twenty (20) inch diameter shall
be minimum eighty (80) percent of full pipe area, and port areas for valve
twenty-four (24) inch diameter and larger shall be minimum seventy (70)
percent of full pipe area, with a minimum one-hundred fifty (150) psi pressure
rating, cast iron body, plugs shall be cast iron also, of one piece construction,
resilient faced,with all exposed nuts,bolts, springs, washers, etc, a minimum
Type 304 stainless steel. Plug valves shall be DeZurik, Milliken, or
approved equal.
b) Valves shall be resilient faced plug valves unless otherwise noted on the plans.
c) All force main plug valves shall be set true and plumb and have a valve box
centered over the valve per county standard detail.
TS 022.01

May 2019 Brunswick County Engineering Department Revision 1.07
d) To the maximum extent possible all plug valves shall be located outside of roads,
streets, driveways, and other paved areas.
e) Earth fill shall be carefully tamped around each valve box to a distance of four(4)
feet on all sides of the box, or to the undisturbed trench face if less than four (4)
feet from the valve box.
10.0 Location of Initial Isolation Valve from a Pump Station
a) Unless otherwise shown on the approved plans, or as directed by the Engineer and
/ or county staff, the contractor shall install a force main isolation valve within
one hundred and fifty (150) feet from a sewer pump station valve vault, and
thereafter as shown on the approved plans.
11.0 Valve Boxes and Collars
a) Install per County Standard Details at each force main valve.
b) Cast iron or ductile iron, screw type, with flared base, length as required for the
buried valve, set plumb and true.
c) The word"SEWER" or"REUSE" shall be cast in the cover.
d) The contractor shall spray paint the cover green (sewer) or purple (reuse) after
installation.
e) No part of the valve box is to rest on the buried valve bonnet — use masonry
support per county standard detail.
f) Install precast concrete ring around valve box in unpaved non-traffic areas per
county standard detail.
g) Valve boxes in traffic areas to be AASHTO H-20 load rated and installed per
county standard detail.
12.0 Valve Markers
a) Valve markers shall be installed in rights-of-way and utility easements as shown
on the County Standard Details.
b) Valve markers shall be concrete if located in the right-of-way, extend thirty-six
(36) inches above finished grade,with the cast MV (main Valve), AV(air release
valve), or BO (blow off) facing the nearest street — refer to County Standard
Details. Valve markers in utility easements shall be fiberglass, extend sixty (60)
inches above finished grade, and be installed with the flat face facing the valve for
installation of the marking decal on the valve marker.
c) Valve marker shall be painted green for sewer force mains and purple for reuse
force mains.
TS 022.01

May 2019 Brunswick County Engineering Department Revision 1.07
d) Concrete valve markers shall have a bronze, stamped, insert on top of marker per
County Standard Detail.
13.0 Force Main Air and Vacuum Release Valves (AVRVs)
a) Combination air/ vacuum valves shall be installed on waste water force mains as
follows:
1) Air and Vacuum Valve: The air and vacuum valve shall be an ARI, Inc,
Model D-025 combination air/vacuum valve, or approved equal.
2) The contractor shall install the AVRVs as shown on the plans, and may
need to adjust actual AVRV locations in the field based upon actual field
conditions to ensure the AVRVs are installed at the true high points.
Actual installed mark up drawings shall be maintained by the contractor so
that accurate asbuilts drawings can be prepared for the County.
3) The combination air / vacuum valve shall be installed in a five (5) foot
diameter precast manhole with a ring and cover assembly, with the
manhole lid offset from the AVRV such that the AVRV is not directly
underneath the access opening, or in a Quazite or GlasMasters polymer
concrete box, or approved equal, Tier 22 rating for both the box and cover,
with the box opening offset from the ARV such that that ARV is not
directly underneath the access opening, per County Standard Details for
air release valves.
4) Maintain adequate cover over force mains at AVRV installations to ensure
top of manhole or polymer concrete box is flush with the surrounding
ground. The contractor shall adjust the force main depth to ensure
adequate cover for the AVRV assembly per County Standard Details.
5) The combination air/vacuum valve shall allow unrestricted venting or re-
entry of air during filling or draining of force main. The valve shall have a
large orifice for the air& vacuum function and a smaller orifice for the air
release function contained within a single valve body.
6) The small air release orifice shall be a Type 304 stainless steel orifice
rated for working pressures up to one hundred fifty(150)psi minimum.
7) The combination air / release valve shall exhaust large quantities of air
during the filling of the pipeline and automatically close after all the air
has been vented.
8) The valve shall continue to release small quantities of air under pressure as
needed to vent entrained air, and shall also automatically open to allow
atmospheric pressure to re-enter the force main during draining or
whenever a negative pressure occurs.
9) The valve body shall have a one (1) inch NPT tap near the bottom to
permit cleanout of accumulated debris from the valve body.
TS 022.01

May 2019 Brunswick County Engineering Department Revision 1.07
10) Valves shall be mounted on McDonald 3800 series stainless steel saddle
with Type 304 stainless steel or better valve and nipples.
11) Provide two (2) inch inlet, outlet, and blowoff valve, and one (1) inch
flushing drain piping to include a one (1) inch flushing valve.
12) Valve internals to be Type 304 stainless steel linkage with a single float
design. Bronze or plastic internal components are not acceptable.
13) The AVRV assembly shall have a stainless steel pressure gauge installed
that is angled for ease of viewing from the manhole or box cover — see
County Standard Details.
14.0 Pipe Marking Tape,Locating Wire, and Electronic Marker Balls
a) Marking tape shall be three (3) inches wide, green or purple in color, bearing
continuous message "CAUTION SEWER LINE BURIED BELOW" or
"CAUTION REUSE LINE BURIED BELOW". Tape shall be made of plastic or
other permanent material and shall be buried continuously above the force main at
a depth of eighteen(18) inches below finished grade.
b) All force mains shall have a #12 AWG, high strength copper clad steel conductor
(HS —CCS) such as Copperhead Superflex, Pro Trace High Flex, or approved
equal, with HDPE insulation, and rated for direct burial. Listed and approved
underground connectors shall be used for all splices. The wire shall be brought
up into a valve box at 1,000 feet maximum intervals to provide wire access points.
The wire shall be taped to the top of the force main at minimum ten (10) foot
intervals.
The contractor shall be required to perform a signal strength test of the installed
tracer wire at the end of the project with County Engineering and / or Public
Utilities staff present. Refer to County Standard Details for tracer wire
information.
b) In addition to the tracing wire, electronic marker balls shall be installed on the
force main in accordance with Brunswick County Technical Specification TS
035.01: "Electronic Marker Balls for Water Mains and Sewer Force Mains".
15.0 Adjacent Facilities
a) Separation of Sewer Force Mains and Water Mains
1) Horizontal and Vertical Separation
Minimum horizontal separation between water mains and sewer force
mains shall be ten (10) feet. The distance shall be measured edge of pipe
to edge of pipe.
2) Should ten (10) foot separation not be feasible, then the water main may
be located closer to the sewer force main provided that:
TS 022.01

May 2019 Brunswick County Engineering Department Revision 1.07
a) It is laid in a separate trench,
b) It is laid in the same trench with the water main located at one side
on a bench of undisturbed earth,
c) In either of case (a) or (b) above, the crown elevation of the force
main shall be at least eighteen (18) inches below the invert
elevation of water line.
3) Force mains crossing underneath water mains shall be laid to provide a
minimum vertical separation of eighteen (18) inches between the invert of
the water main and the crown elevation of the sewer main. The crossing
shall be arranged perpendicularly so that the force main joints will be
equidistant and at least ten(10) feet from the crossing in each direction.
4) If it is impossible to maintain the required horizontal and vertical
separation as described above, or anytime a force main must be laid above
a water main, then both the water main and force main must be encased in
ferrous sleeves. Sleeves shall have sealed ends. If the water main is ferrous
with joints equivalent to water main standards, then the water main does
not have to be encased within an additional sleeve.
5) Mechanical joints will be required for the transition in the force main at
water main / force main crossings. Fernco couplings are not permitted to
be used. Special structural support for the water and force mains may be
required at the discretion of County staff.
6) Force mains shall not be laid in the same trench with gas lines or electric
wiring.
7) No force main shall be placed within twenty-five (25) feet of a well
utilized for potable water purposes.
8) Minimum specifications for force mains placed between twenty-five (25)
feet and fifty (50) feet of a well utilized for potable water shall meet or
exceed the requirements of Class 350 ductile iron pipe with watertight
joints conforming to ANSI A21.50/A21.51.
15.0 General Construction Installation
a) Install all force mains as shown on the approved plans to line and grade.
b) Where unsuitable soils are encountered pipe shall be bedded on#57 stone.
c) The contractor is responsible for dewatering all trenches prior to force main
installation. Include cost of dewatering, backfill, and erosion control in unit cost
for pipe — separate payment for these items will not be made by the County.
Stone installation shall not be used as a dewatering device.
d) All jointing of pipe shall be in conformance with the manufacturer's
recommendations.
TS 022.01

May 2019 Brunswick County Engineering Department Revision 1.07
e) Defective pipe and/or fittings shall not be utilized in force main construction.
f) Install all restrained joints in accordance with manufacturer's recommendations.
g) Existing gravity manholes that have sewer force mains entering them shall be
coated on the interior per county technical specification TS 020.01: Gravity
Sanitary Sewer Systems — Section 5.0 (a) (15) and may only be allowed by
permission of county staff. It may be required to replace the existing manhole
with a precast polymer concrete manhole.
h) New gravity manholes, and manholes installed to allow a new force main to
connect to an existing sewer system, shall be precast polymer concrete sections
conforming to ASTM C478 as manufactured by Armorock, Meyer Polycrete, or
approved equal. Riser section joints shall be bell and spigot/ship-lap design with
butyl mastic and / or rubber gaskets (ASTM C990) so that on assembly the
manhole base, riser(s), and top sections make a continuous and uniform manhole
structure. All fasteners, wedge anchors, bolts, hooks, etc., within the manhole
shall be Type 316 stainless steel or better—no mild steel will be allowed.
h) County staff must be present at all connections to existing force mains. Forty-
eight(48)hours' notice is required to schedule a force main connection.
16.0 Hydrostatic Testing of Force Mains
a) All force mains shall be successfully hydrostatically pressure tested per AWWA
standards at a pressure of one and one-half times the rated working pressure, but
in no case shall the test pressure be less than one hundred fifty (150) psig for a
minimum of two (2) hours.
b) All force main pressure testing shall be witnessed and approved by county staff
and/or the Engineer.
c) Minimum forty-eight (48) hours notice is required to schedule a force main
pressure test with county staff.
d) Horizontal directional drills (HDD) shall be pressure tested as noted on the county
HDD standard details and will be tested a second time as part of the overall
system pressure test once the HDD force main has been connected to the installed
force main system.
TS 022.01