WQ0041586_Application_20231122 (8)

TECHNICAL SPECIFICATIONS
THE HAMPTONS - PHASE 3
Brunswick County, NC
For
Caw Caw Land Corporation
252 S. Middleton Dr., NW
Calabash, NC 28467
910-845-6928
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April 2023
Prepared by:
NORRIS & TUNSTALL CONSULTING ENGINEERS, P.C.
1429 Ash -Little River Road
Ash, North Carolina 28420
[phone]
[phone] (Fax)
License # C-3641
N&T Project No. 23007

September 2012 Brunswick County Engineering Department Revision 1.00
TECHNICAL SPECIFICATIONS
Specification Title
Definitions and Terms
Existing Underground Utility Lines and Structures
Field Engineering
Special Project Procedures
Project Meetings
Project Schedule
Project Submittals
Construction Facilities and Temporary Controls
Erosion and Sedimentation Control
As -Built Drawings
Dewatering
Specification Number
TS 001
TS 002
TS 003
TS 004
TS 005
TS 006
TS 007
TS 008
TS 009
TS O10
TS O11
Trench Boxes, Sheeting, and Shoring TS 012
Excavating, Grading, Trenching, & Backfilling TS 013
5
Concrete Curb, Gutters, Driveways, & Sidewalks TS 016
Asphalt Paving TS 017
Water Distribution System TS 018
Storm Water Drainage Systems TS 019
Low Pressure Sewer Systems & Grinder Pumps TS 021
Waste Water Force Mains TS 022
TT T TT T
Oh
3
Landscaping TS 025
Concrete Reinforcement TS 026
7
General Electrical Information TS 028
Electrical Services
Grounding and Bonding
Surge Protection
TS 029
TS 030
TS 031
Electronic Marker Balls for Water Mains and Sewer Force Mains TS 035

June 2020 Brunswick County Engineering Department Revision 1.01
Technical Specification 001
DEFINITIONS AND TERMS
1.0 General
a) The intent of this specification is to explain and define certain terms and phrases
that appear in the Brunswick County Engineering Des Manual, Technical
2ecifications, and Standard Details for Water and Sewer Systems (hereinafter
"Design Manual").
b) For a Brunswick County Capital Improvement Program (CIP) project, Article 1 of
the Brunswick County General Conditions of the Contract (hereinafter "General
Conditions") shall be the official definition of terms. This technical specification
is intended to be a guide to language in the Design Manual and therefore
complimentary to Article 1 of the General Conditions, and in the case of any
conflict between this specification and Article 1 of the General Conditions, this
specification shall be subordinate to Article 1 of the General Conditions.
2.0 Interpretation of Certain Terms and Words
a) Except as specifically defined herein all words used in these Technical
Specifications have their customary dictionary definitions. For the purposes of
these Technical Specifications certain words or terms used herein are hereby
defined as follows:
b) Words used in the present tense include the future tense. Words used in the
singular include the plural and words used in the plural include the singular.
Words used in the masculine include the feminine also.
c) The word "shall" is always mandatory
d) The word "may" is permissive
e) The word "lot" includes the word "plat" or "parcel"
f) The word "person" includes a firm, association, organization, partnership, trust
company, limited liability company, or corporation as well as an individual.
3.0 Definitions
AASHTO: American Association of State Highway and
Transportation Officials.
AHJ: Authority Having Jurisdiction.
ANSI: The latest edition of Standards published by the
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June 2020 Brunswick County Engineering Department Revision 1.01
American National Standards Institute.
ASTM: The latest edition of Standards published by the
American Society of Testing and Materials.
AWWA: American Water Works Association.
Cleanout: An access point for a gravity sewer service lateral to
be used for inspection and maintenance purposes by
County staff or licensed plumbers.
Clearing & Grubbing: The removal and disposal of all trees, root mat,
roots, logs, shrubs, grass, weeds, fallen timber and
any other litter or surface debris such as, but
not limited to, fences, steps, walls, chimneys,
column footings, other footings, foundation slabs,
basements, other foundation components, sign,
junked vehicles, and other rubble and debris, which
occur within areas designated as Easements, Limits
of Disturbance, or clearing limits, as shows on the
Contract Drawings. The more expansive limits
shown on the drawings shall define the area to be
cleared and grubbed unless otherwise note as an
undisturbed area. All areas cleared and grubbed
shall be left in a condition to meet the requirements
of Brunswick County Technical Specification TS
025: Landscaping. The word clearing shall be
interchangeable with clearing and grubbing.
Contractor: A person or business entity legally licensed by the
State of North Carolina Licensing Board for
General Contractors; to perform installation,
repairs, and connections to County water and sewer
systems. The license holder must also have the
Underground Utilities designation in addition to a
General Contractor license.
County: Brunswick County.
Customer: Any person, firm, association, business, or
governmental agency that receives water and / or
sewer service from Brunswick County Public
Utilities.
Density: The number of habitable structures per acre, or
number of bedrooms per development, used to
calculate water and waste water flow rates.
Design Manual: This Brunswick County Engineering Design
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June 2020 Brunswick County Engineering Department Revision 1.01
Manual, Technical Specifications, and Standard
Details for Water and Sewer Systems.
Developer: Any person, firm, corporation, or other legal entity
improving property for commercial, industrial, or
residential purposes.
Drawings: All plans, profiles, maps, or other drawings that
show the location, character, dimensions, and
details of the work produced by an Engineer.
Design Work: Work produced by a Professional Engineer for a
developer or the County related to the installation of
water, sewer, or stormwater infrastructure.
DWQ: Division of Water Quality (a division of NCDEQ).
Easement: Legal rights conveyed by a Grantor to a Grantee to
any person, firm, corporation or public entity for the
use of a strip or parcel of land for a specified
purpose; fee simple land ownership rights do not
convey with an easement.
EJCDC: Engineers Joint Contract Documents Committee.
Engineer: A person registered as a Professional Engineer by
the North Carolina Board of Registration for
Engineers and Land Surveyors (the Board) in one
of the approved fields of licensure by the Board and
qualified to design and permit water transmission
and distribution, sewer collection, pump
stations, water treatment, wastewater treatment,
stormwater, streets, curb and guttering, or other
required design elements and procedures.
FDC: Fire Department Connection; a device on the size of
a building, or possibly some distance remote from
the building, that is connected to the sprinkler
system for the purposes of allowing the Fire
Department to boost the sprinkler system pressure
via external means — usually by use of a fire
department pumper truck.
Feet of Head: A unit of pressure measurement; a column of water
2.31 feet tall = 1.0 PSIG.
Governing Authority: The Board of Commissioners of Brunswick County,
North Carolina.
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June 2020 Brunswick County Engineering Department Revision 1.01
Lot: A piece, parcel, tract, or plat of land intended as a
unit for the transfer of ownership for development.
NCDEQ: North Carolina Department of Environmental
Quality.
NCDOT: North Carolina Department of Transportation.
NEC: National Electrical Code — NFPA 70.
NEMA: National Electrical Manufacturers Association.
NFPA 110: National Fire Protection Association; Standard for
Emergency and Standby Power Systems.
NSF: National Sanitation Foundation.
Owner: Brunswick County, or County.
Planning Commission: The Brunswick County Planning Board.
Plat: A map or drawing upon which a plan of subdivision
or development is presented for review and
approval.
PSIG: Pounds per Square Inch, Gage — a unit of pressure
measurement.
Public Right -of- Way (or ROW): Public rights -of -way are considered to mean public
street rights -of -way or any other public right-of-
way.
Public Utility Easement, or (PUE): Permanent easements and associated rights in the
name of the County as the Guarantee and that are a
matter of public record by virtue of being recorded
at the County Register of Deeds office; usually
obtained for the installation and maintenance of
water mains, sewer mains, water and/or sewer pump
stations, water storage tanks, etc.
Pump Station: A structure or pumping facility used to facilitate the
transmission of water or wastewater through the use
of pumps and a transmission and/or distribution
system.
Private Easement: Easement rights negotiated between two private
parties; the County is not a party to a Private
Easement.
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June 2020 Brunswick County Engineering Department Revision 1.01
PWSS:
Public Water Supply Systems (a division of
NCDEQ).
SCADA: Supervisory Control and Data Acquisition; a means
of remotely monitoring water, sewer, and pump
station infrastructure.
Service Box: A water meter box or a low pressure sewer box on a
customer's property.
Service Lateral: The connection between a County water and/or
sewer main and the service box on the customer's
property.
Sewer Main: Any pipe or conduit that is part of the County's
sewer transmission and/or distribution system and is
used to transport sewer flow from more than one
user connection to a waste water treatment facility.
Shop Submittals: Technical information submitted to the Engineer
and / or the County for review and approval of
materials to be used in the construction of water
and sewer systems.
Standard Details: The water, sewer, and pump station detail drawings
prepared by the County Engineering and Public
Utilities departments and are posted on the County
website for use by the design community.
Subdivision: The division of a tract of land into two or more lots
for the purpose, whether immediate or future, of
sale or development. This includes all division of
land involving a new street or a change in the
arrangement of streets and includes any re -
subdivision of land. Subdivision shall also refer to
uses of land not ordinarily considered a subdivision
such as mobile home parks, multifamily parcels,
townhouses, and planned unit developments.
Surveyor: A person registered as a Land Surveyor by the
North Carolina Board of Registration for Engineers
and Land Surveyors and qualified to practice
land surveying.
Temporary Construction Easement: Temporary Construction Easements that are
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June 2020 Brunswick County Engineering Department Revision 1.01
obtained from a private or public landowner for
temporary impacts due to utility infrastructure
construction; TCEs are not recorded at the County
Register of Deeds and the TCE dissolves at the end
of the construction project.
User Connection: The point of connection of a customer's plumbing
to the County's service box.
Water Main: Any pipe or conduit that is part of the County's
water transmission and/or distribution system and is
used to transport water flow to more than one user
connection from a water treatment facility.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 002
EXISTING UNDERGROUND UTILITY LINES AND STRUCTURES
1.0 General
a) Every landowner, developer, or contractor who contracts to perform excavation,
demolition, or installation activities within a site or on a project located in
Brunswick County is responsible to ascertain the location and type of all
underground utility lines or structures that may be located within the limits of the
project work area.
b) Some of these underground utilities or structures may have been designated on the
plans, however, the exact location may vary and others may not be designated.
The contractor is fully responsible for verification of the exact location of all
underground utility lines or structures within the work limits, whether shown on
the plans or not, and for providing necessary protection and/or repair if damaged.
c) For a Brunswick County Capital Improvement Program (CIP) project Article 21
of the Brunswick County General Conditions of the Contract is also a part of this
specification and is fully incorporated herein. Where a conflict may exist
between this technical specification and Article 21 of the General Conditions, this
specification shall be subordinate to Article 21 of the General Condition of the
Contract.
2.0 Underground Damage Prevention Act
a) The contractor is directed to comply fully with the applicable provisions of Senate
Bill 168 "Underground Damage Prevention Act" as passed by the General
Assembly of the State of North Carolina.
b) Listing of Utility Companies: The following utility companies may have facilities
within the work limits and it is required that the contractor establish coordination
and utilities location with each prior to initiating work. There may be others not
mentioned here and it is the contractor's responsibility to ensure that the proper
notification has been made to all utilities owners with infrastructure within the
proposed project work area:
1) Brunswick County Public Utilities
250 Grey Water Road NE
Field Operations Center
Supply, North Carolina 28462
910.253.2860
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September 2012 Brunswick County Engineering Department Revision 1.00
2) ATMC
640 Whiteville Road NW
Post Office Box 3198
Shallotte, North Carolina 28459
910.755.1706
3) Brunswick EMC
Post Office Box 826
Shallotte, North Carolina 28459
910.754.4391
800.842.5871
4) Progress Energy Carolinas, Inc.
8645 Trade Street
Leland, North Carolina 28451
910.383.4042
5) Piedmont Natural Gas
Corporate Office
4720 Piedmont Row Drive
Charlotte, North Carolina 28210
704.364.3120
Natural Gas Emergencies: 800.752.7504 or 911
6) The contractor shall call the North Carolina One Call Center at:
811 or 1-800-632-4949
www.nc811.org
for locates on underground utilities.
3.0 Existing Underground Utility line or Structure Location and Marking by Owners
a) The contractor shall make a documented request to the North Carolina One Call
Center, and/or individual utility owners, in order to locate their facilities within
the project work limits at least 48 hours in advance of the day excavation or
demolition work is scheduled to begin. Location assistance requested from the
owner should include the actual horizontal location, type number, size and depth
of all lines. Some, but not all, cooperative actions the contractor should take
either on or off the job site are as follows:
b) The contractor shall ascertain if the utility owner desires to have his representative
present during the work.
c) The contractor shall comply with all standard regulations and take all precautions
required by the owner of the facility.
d) All costs associated with locating and marking existing utilities or the utilities
representatives shall be the responsibility of the contractor.
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September 2012 Brunswick County Engineering Department Revision 1.00
e) The contractor shall inform all equipment operators, either those employed by
him or those employed by his subcontractors, of information obtained from the
utility owners prior to initiation of work.
f) The contractor shall immediately notify utility owner of any leaks or breaks,
dents, gouges, grooves or other damages to such line coating or cathodic
protection created or discovered by him in the course of the work.
g) The contractor must immediately alert the occupants of the adjacent premises of
any emergencies that he may create or discover at the work site.
4.0 Location and Protection of Utility Lines
a) The location of all utilities shall be made with locating equipment well in advance
of actual work. The located facility shall be plainly marked by coded paint
designations on the paved areas or by coded stakes or flags along the unpaved
areas. All marked locations are to be made at least 500 feet in advance of all
trench excavation and the location and utility protection provided by the
contractor must be to the satisfaction of the engineer and the County.
Furthermore, the contractor shall uncover any utility and obtain the utility
elevation as required by the engineer. All damages to existing utility facilities in
the work area during trenching and installation of facilities for this contract are
the responsibility of the contractor and he shall repair or replace damaged lines to
the satisfaction of the utility owner.
5.0 Protection of Existing Utilities and Facilities
a) In the conduct of his operations, the contractor shall take special precautions to
protect equipment, structures, utility lines, roadways, subsurfaces, submerged, and
overhead facilities against damage. In the event the facilities are disturbed,
damaged, or injured as a result of the contractor's operation then the contractor
shall immediately notify the utility owner and the County, and in conjunction
with the owner determine the proper method of replacing, repairing, or restoring
the affected facilities to the conditions which existed prior to the contractor's
operations.
b) The contractor shall, at his own expense, replace, repair or restore the affected
facilities or areas to their original condition or shall reimburse the owner of said
facilities for such expenses as the said owner may accrue in performing the work.
6.0 Connections to Existing Facilities
a) Connections to existing facilities which are in service shall be thoroughly planned
in advance, and all required equipment, materials and labor required for a
successful connection shall be on hand at the time of undertaking the connections.
Work shall proceed continuously (around the clock) if necessary to complete
connections in the minimum time. Operation of valves or other appurtenances on
existing utilities, when required, shall be by or under the direct supervision of the
owning utility.
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September 2012 Brunswick County Engineering Department Revision 1.00
b) Brunswick County Engineering and Utilities Departments do not allow tapping
operations to existing mains on Fridays or on the day before a scheduled County
holiday.
c) A County Engineering and /or Public Utilities department inspector must be
present during all wet tap operations on existing mains, and the contractor shall
retrieve the coupon removed from the main and deliver same to County staff
for verification of successful coupon removal.
d) The contractor shall comply with all NCDOT requirements for work within public
rights- of -way during normal working hours and also in advance of weekends and
holidays.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 003
FIELD ENGINEERING
1.0 General
a) The intent of this specification is to briefly describe the responsibilities of the
Engineer and the utility contractor with regards to field engineering for a water
and / or sewer project permitted in the County's name as public infrastructure.
b) For a Brunswick County Capital Improvement Program (CIP) project Article 11
of the Brunswick County General Conditions of the Contract is also a part of this
specification and is fully incorporated herein. Where a conflict may exist
between this technical specification and Article 11 of the General Conditions, this
specification shall be subordinate to Article I 1 of the General Condition of the
Contract.
2.0 Construction Layout
a) It shall be the Engineer's responsibility to:
1) Perform all required field surveying and engineering in order to produce
accurate plans for the project.
2) For projects that involve public sewer, the engineer shall field locate all
wells within the construction project limits and within the radius of any
wellhead protection zone required by the North Carolina Department of
Environmental Quality / Public Water Supply Section, and to show the
location of these wells and wellhead protection radii on the engineered
drawings submitted to Brunswick County Engineering for plan review and
approval. They shall also be shown on the asbuilt drawings.
3) Establish all required horizontal and vertical control required for the
project work area for the contractor by utilizing permanent and temporary
benchmarks and showing these benchmarks on the engineered plans.
b) It shall be the utility contractor's responsibility to:
I) Utilize the provided bench marks for vertical and horizontal control as
indicated on the plans. It shall be the responsibility of the utility
contractor to perform all of the field horizontal and vertical control of the
facilities, and to maintain or replace these points and to provide such
supplemental and additional finished lines, offsets, grades, and other
measurements as may be required to ensure control and completion of the
work, including staking the work limits of any utility easement and/or
rights -of -way.
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September 2012 Brunswick County Engineering Department Revision 1.00
2) All permanent and temporary benchmarks used during construction layout
shall be noted on the record drawings and asbuilt drawings.
3.0 Asbuilt Drawings
a) It shall be the utility contractor's responsibility to:
1) Maintain a marked up set of the construction drawings that accurately
reflects all changes made to the work as approved by the Engineer and/or
Brunswick County staff.
2) Provide the record drawings to the Engineer at the end of the project so
that accurate asbuilt drawings can be produced by the Engineer.
b) It shall be the Engineer's responsibility to:
1) Provide asbuilt drawings to Brunswick County at the end of the project in
accordance with:
a) The Brunswick County Construction Checklist, and
b) Brunswick County Technical Specification TS 010: As -Built
Drawings.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 004
SPECIAL PROJECT PROCEDURES
1.0 General
a) It is the intent of this specification to provide general information on special
project procedures and County policy on making taps on mains, water for flushing
and pressure testing, etc.
b) For a Brunswick County Capital Improvement Program (CIP) project, this
specification shall be subordinate to the County Construction Documents Project
Manual for that CIP project as if fully incorporated herein.
c) Any areas covered in this specification but not covered in the Co,
Construction Documents Project Manual for a CIP project shall be fully in force
for either a developer installed project or a County CIP project. An example of
this would be the County policy for not allowing a new tap on a main on Fridays
or the day before a scheduled County holiday.
d) Contact Brunswick County Engineering and/or Public Utilities staff with any
questions about special project procedures.
2.0 Excavation and Trenching Plan
a) Prior to initiating any excavation or trenching operations the utility contractor
shall prepare a detailed excavation and trenching plan for the safety of his
employees. This plan shall indicate the intended procedures to be used by the
contractor to comply with all OSHA requirements. Such plan should further
identify a competent person that will work with each crew. A copy of said plan
shall be available for review at the job site at all times.
3.0 Removal of Pipe
a) Any pipeline placed outside of public rights -of -way and/or utility easements as
shown on the approved plans will be removed and reinstalled at the correct
location at the contractor's expense.
4.0 Water for Flushing and Pressure Testing
a) The utility contractor shall coordinate with Brunswick County staff prior to
operating any County water system valve, or obtaining County water for any
purpose.
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September 2012 Brunswick County Engineering Department Revision 1.00
5.0 Taps on Existing County Mains
a) Brunswick County staff must be present at all wet taps to existing County water
and sewer mains. No new connections will be conducted on Fridays or the day
before a scheduled County holiday. Taps will not be allowed later than 1pm. The
contractor shall deliver the coupon removed from the main to County staff.
6.0 Project Videotape
a) For all County capital improvement program (CIP) projects the utility contractor
shall provide a preconstruction project videotape on a DVD to County
Engineering or Public Utilities. The playback speed and quality of recording
must be acceptable to the County. For all projects the utility contractor shall
comply with all NCDOT requirements for a project videotape in accordance with
all project conditions in the issued right-of-way Encroachment Agreement.
7.0 Drainage
a) The utility contractor shall maintain drainage ways to a condition at least equal to
preconstruction conditions. Positive drainage shall be provided at all times.
8.0 Traffic Signs
a) Street signs and markers which are temporarily removed shall be protected and
reinstalled within the same workday in which they are taken down.
9.0 Other Contractors and Subcontractors
a) The utility contractor is responsible for coordinating work with that of other
contractors working within the same area, and also for the scheduling and
oversight of any subcontractors working for the prime contractor. On County
capital improvement projects no more than 50% of the project can be
subcontracted in accordance with the Contract Documents.
10.0 Temporary Storage Areas
a) The utility contractor is responsible for obtaining and maintaining storage areas
for materials and equipment. For County capital improvement projects (CIP) any
agreements made with private property owners shall be documented in writing
and a copy of the agreement provided to County Engineering and / or Public
Utilities. Maintenance shall include grass cutting, positive drainage, regular clean-
ups, final clean-up, and restoration.
11.0 Notification to Residents
a) The utility contractor shall notify local residents of construction activity at least
seven days prior to beginning work in the project area.
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September 2012 Brunswick County Engineering Department Revision 1.00
12.0 Clean-up and Restoration
a) Clean-up and restoration shall be performed at the earliest possible time. Within
seven (7) days of completion of backfilling, clean-up shall be complete for all
backfilled construction areas. Within thirty (30) days of completion of
backfilling, final restoration shall be complete. If final clean up and restoration
of the areas are not completed within thirty (30) days, a stop work order may be
given and efforts will be made to restore those areas. No claim for extra time will
be allowed as a result of stop work orders for clean up and restoration.
13.0 Pavement Restoration
a) Minimum thickness for restoration pavement shall be equal to the originally
disturbed pavement (or thicker if so specified elsewhere). Minimum thickness for
restoration of aggregate base course shall be equal to the originally disturbed
aggregate base course (or thicker if so specified elsewhere).
14.0 Repair of Existing Dirt and Gravel Roads
a) The utility contractor is responsible to repair and re -grade all dirt and gravel roads
that have been disturbed by construction operations in the project area. Each road
shall be re -graded as required prior to final completion and acceptance of the
project by the County.
15.0 Contractor Work Force
a) For County Capital Improvement Program (CIP) projects, the contractor shall not
bid with the intent to, nor will be permitted to, subcontract more than fifty (50)
percent of the total dollar value of the total contract as determined from the
breakdown of unit prices contained in the proposal. This provision will be
interpreted to mean that the on -site labor and materials associated with the
construction of those items of work which total at least fifty (50) percent of the
total dollar value of the total contract must be provided by the contractor's own
personnel and equipment (owned and rented).
16.0 Permits and Pre -Construction Conference
a) The utility contractor shall not begin work on the project before the Pre -
Construction Conference (Pre -Con) conducted by County staff. This required
meeting will not be scheduled until all applicable water, sewer, stormwater,
NCDOT encroachment, or other required permits have been issued by the
appropriate regulatory agencies. The utility contractor is responsible for
understanding and obeying all local, state, and federal government laws and
ordinances pertaining to the project work.
b) For work in the public ROW where a NCDOT encroachment permit is required
the contractor will, if NCDOT does not attend the scheduled Pre -Construction
Conference at County Engineering, schedule a separate meeting with NCDOT as
required prior to commencement of any work activities in the public right-of-way.
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September 2012 Brunswick County Engineering Department Revision 1.00
17.0 Private Property Encroachments
a) The utility contractor is forbidden to work off the right-of-way or public utility
easement without written permission of the adjoining property owner. If it comes
to the attention of the County or Engineer that the contractor has so encroached, it
will be cause for suspension of work until such written permission is obtained. In
the case of permanent easements, the contractor is to ascertain that such
easements have been acquired and recorded prior to commencing construction.
The contractor is advised to confirm with County staff that any temporary
construction easements shown on the approved plans have been obtained from the
affected property owner prior to accessing that private parcel. County staff will
assist the utility contractor with confirming properly recorded public utility
easements and temporary construction easements if so requested.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 005
PROJECT MEETINGS
1.0 Preconstruction Conference
a) A Pre -Construction Conference (Pre -Con) with Brunswick County Engineering is
required prior to beginning any installation of new water, sewer, or pump station
utilities that are permitted in the County's name. These meetings are held in the
Engineering Department and require a minimum of forty-eight (48) hours
notification to schedule. Required attendees are the Engineer, utility contractor's
project manager, utility contractor's field superintendent, and the Engineering
Inspector assigned to the project.
b) On occasion the Pre -Con may be allowed, at the County's discretion, to be held
at the project site depending upon the nature of the work. These onsite meetings
will be scheduled with the Engineering Inspector that is assigned to the project.
c) If the NCDOT does not, or cannot, attend the scheduled Pre -Construction
Conference at County Engineering, then it is the responsibility of the utility
contractor, in accordance with the special provisions of the right-of-way
encroachment permit, to schedule the required NCDOT pre -construction
conference prior to beginning any work in the public ROW. The County
Engineering Inspector must be in attendance as this NCDOT Pre -Construction
meeting.
d) The required Pre -Con for County capital improvement projects (CIP) will not be
scheduled prior to the utility contractor providing the digital DVD, of good
viewable quality, to County Engineering in advance of requesting the Pre -Con so
that it can be determined if the video quality is acceptable.
2.0 Monthly Progress Meetings — CIP projects
a) For County Capital Improvement Program (CIP) projects the County requires
a regularly scheduled monthly progress meeting in order to discuss project
progress, updated project schedule, material issues, public complaints, and all
other issues that need resolution and that may affect project completion within the
Contract Time. Article 31 of the Brunswick County General Conditions of the
Contract covers the required monthly progress meetings and is considered
incorporated in this specification as if fully contained herein.
b) Required attendees at these meetings are the utility contractor, Engineer, County
staff, municipal officials if applicable, and any subcontractors to the prime
contractor. Minutes will be taken at these meetings and disseminated to all
attendees.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 006
PROJECT SCHEDULE
1.0 Preparation
a) For a County Capital Improvement Program (CIP) project the utility contractor
shall comply fully Article 32 of the Brunswick County General Conditions of the
Contract.
b) The basic requirements of Article 32 of the General Conditions are:
1) The Project Expediter provide a project construction schedule in the form
of a either a detailed bar chart or Critical Path Method (CPM).
2) This schedule shall be submitted to the Engineer / Designer for review,
comments, and approval.
3) The proposed project schedule shall be presented to the Engineer /
Designer no later than ten (10) days after the project start date for projects
with a total Contract Price of $500,000 or less.
4) The proposed project schedule shall be presented to the Engineer /
Designer no later than thirty (30) days after the project start date for
projects with a total Contract Price in excess of $500,000.
5) No Request for Payment will be processed until schedule is accepted by
the County.
c) Each activity in the progress or work schedule shall be identified and a time for
the performance of such activity indicated. Each activity shall be preceded by all
work that must be accomplished prior to that activity. All abbreviations, codes
and/or symbols used shall be described on the schedule. The critical path shall be
identified. The submittal shall be reviewed, and comments shall be addressed by
the utility contractor prior to County approval. The approved schedule shall be
the baseline for all schedule adjustments under the Contract.
d) If requested by the County, in accordance with Article 32 of the General
Conditions, the schedule will accurately reflect the cost associated with each
scheduled activity. The schedule will include all testing, inspection, and
certification activities.
2.0 Additional Project Schedule Information
a) Refer to Article 32 of the General Conditions of the Contract.
b) Direct any questions to County Engineering and / or Public Utilities staff.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 007
PROJECT SUBMITTALS
1.0 General
a) The intent of this specification is to provide guidance to the utility contractor
on the project submittal process.
b) For Brunswick County Capital Improvement Program (CIP) projects, Article 10
of the Brunswick County General Conditions of the Contract provides guidance
on the project submittal process, and the utility contractor shall comply with the
General Conditions for the submittal process. Article 10 of the General
Conditions of the Contract is fully incorporated herein by reference.
2.0 Submittals
a) Submittals are defined as shop drawings, diagrams, illustrations, schedules,
performance charts, technical specification sheets, sewer pump curves, brochures,
and other data prepared and submitted for review and approval by the utility
contractor for the project.
3.0 Submittal Procedures
a) All submittals shall be delivered to the Engineer by the utility contractor. The
Engineer will review the submittals and certify they meet or exceed County
requirements. The number of required copies to be submitted will be determined
by the Engineer with a minimum of three (3) — one set will be retained by the
Engineer and the remaining two sets will be given back to the utility contractor
and the County after review and approval by the Engineer.
4.0 Shop Drawings
a) Shop drawings shall show the principal dimensions, weight, structural and
operating features, performance characteristics, wiring diagrams, space required,
clearances, type and/or brand of finish or shop coat, grease fittings, etc.,
depending on the subject of the drawing. When it is customary to do so, or when
the material dimensions are of particular importance or when so specified, the
drawings shall be certified by the manufacturer or fabricator as correct.
b) When so specified or if considered by the Engineer to be acceptable,
manufacturer's specifications, catalog data, descriptive matter, illustrations, etc.,
may be submitted for review in place of shop and working drawings. In such
case, the requirements shall be as specified for shop and working drawings,
insofar as possible.
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September 2012 Brunswick County Engineering Department Revision 1.00
c) The utility contractor shall be responsible for the prompt submission of all shop
and working drawings in accordance with the project schedule to prevent delay to
the commencement of work due to the absence of such drawings.
d) No material shall be purchased or fabricated until the required shop drawings and
associated submittals have been submitted, reviewed, and approved by the
Engineer.
5.0 Developer Installed Infrastructure
a) The developer's Engineer shall be responsible for ensuring the contractor utilizes
materials that meet the County's technical specifications and standard details for
water and sewer infrastructure that is permitted in the County's name.
b) County staff reserves the right to reject any material deemed unfit or not meeting
County standards.
5.0 Certifications and Tests
a) Two copies of certifications and reports of tests, when required under the various
sections of the Contract Documents, shall be submitted to the Engineer.
b) The utility contractor shall provide the originals of all bacteriological testing
results for water mains to the County.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 008
CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS
1.0 General
a) This specification details the utility contractor's responsibilities for providing
temporary facilities and necessary controls required for the successful completion
of a utility infrastructure project.
b) For Brunswick County Capital Improvement Program (CIP) projects the
Brunswick County General Conditions of the Contract provide guidance on
construction facilities and temporary controls, and the utility contractor shall fully
comply with the General Conditions. The Brunswick County General Conditions
of the Contract is fully incorporated herein by reference and is considered a part
of this specification.
c) Contact County staff with any questions concerning Construction Facilities and
Temporary Controls.
2.0 Consent for Utilization of Private Property
a) The utility contractor is responsible for obtaining written consent from the proper
parties prior to entering or utilizing any private property for any project involving
Brunswick County. A copy of the agreement between the contractor and the
property owner must be provided to County staff prior to commencing any work
on the project that involves the utilization of any privately owned property.
3.0 Work Zones, Traffic Interference, and Street Protection
a) The utility contractor is solely responsible for all work zone setup and
maintenance and personnel safety on the project work site.
b) The utility contractor shall not close or obstruct any portion of a public street or
road or any private right-of-way without obtaining permits or permissions from
the proper authorities or owners. The utility contractor shall, twenty-four (24)
hours in advance of closing any street, if approved, notify the NCDOT, police,
sheriff, and fire departments. He shall cooperate with all appropriate authorities
in the establishment of alternate routes and, at his own expense, shall provide
adequate, plainly -marked detour signs.
c) If any public street or road or private right-of-way is rendered unsafe by the utility
contractor's operations then he shall immediately make any repairs or provide
such temporary access as may be needed for the traveling public that is acceptable
to the appropriate authority.
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September 2012 Brunswick County Engineering Department Revision 1.00
d) Streets, roads, private ways and walks not closed shall be maintained passable by
the utility contractor at his expense, and the utility contractor shall assume full
responsibility for the adequacy and safety of any and all provisions made.
e) Traffic shall be maintained in accordance with the North Carolina Department of
Transportation traffic maintenance procedures. For work within the public rights -
of -way the issued NCDOT encroachment permit shall be on the job site at all
times work is ongoing and shall be accessible for inspection if requested by
NCDOT and / or County staff.
f) For the proper control of traffic, the contractor shall provide work zones in
accordance with the Manual on Uniform Traffic Control Devices (MUTCD) or
any other applicable guidance documents published by NCDOT.
4.0 Traffic Safety
a) The utility contractor shall furnish, erect and maintain all barricades, warning
signs, and markings for hazards necessary to protect the public and the work,
especially when excavating adjacent to existing roadways. When used during
periods of darkness, such barricades, warning signs and hazard markings shall be
suitably illuminated. Flagmen, if required, shall be provided to facilitate safe
movement between construction operations and normal traffic flow. For vehicular
and pedestrian traffic, the contractor shall furnish, erect and maintain barricades,
warning signs, lights and other traffic control devices in conformity with the
Manual of Uniform Traffic Control Devices for Streets and Highways and all
NCDOT requirements.
b) The utility contractor is responsible for obtaining permission from the North
Carolina Department of Transportation for road closures, detours, and for any
work within, or on, public streets and rights -of -way.
5.0 Roadways and Haul Roads
a) In general, the utility contractor shall confine his equipment and hauling where
practical to existing public rights -of -way or easements acquired by the County. If
existing pavement is damaged by the contractor's hauling operations, it shall be
repaired to its original condition at the contractor's expense, including full width
overlay if determined needed by the County, Engineer, and/or NCDOT (if a
public street or road). Existing roads shall be kept clean and free from all dirt,
mud, or construction debris.
6.0 Safety Precautions
a) Until final acceptance of the work, the utility contractor shall continuously
maintain adequate protection of the work and work in progress from damage. He
shall adequately protect adjacent private and public property as provided by law
and these Specifications.
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September 2012 Brunswick County Engineering Department Revision 1.00
b) The utility contractor shall take all necessary precautions for the safety of
employees on the work, and shall comply with all applicable provisions of
federal, state and local safety laws and building codes to prevent accidents or
injury; to persons on, about or adjacent to the premises where the work is being
performed. He shall erect and properly maintain at all times as required by the
conditions and progress of the work, all necessary safeguards and barricades for
the protection of employees performing the work and provide for the safety of
others near the work site.
7.0 Accident Reporting and Risk Assumption
a) The utility contractor shall assume all risks of loss or damage of any kind to any
vehicles, machinery, equipment, materials or supplies which it shall provide in
doing the work.
b) The utility contractor is responsible for adequate reporting, to the County and all
applicable authorities, all serious accidents related to any work involving the
County either on County CIP projects or developer installed infrastructure
permitted in the name of Brunswick County.
c) If a claim is made or suit is filed by anyone against the utility contractor, or any
subcontractor to the utility contractor, on account of any accident, the utility
contractor shall promptly report the facts in writing to the County giving full
details of the claim.
8.0 Operational Hours
a) The utility contractor shall limit his work activities to daylight hours between 7:30
a.m. until 6:00 p.m., Monday through Friday, excluding holidays.
b) The utility contractor shall also comply with all conditions contained within an
approved NCDOT encroachment permit with regards to working hours in the
public rights -of -way and ceasing work within the rights -of -way in advance of a
recognized holiday.
9.0 Noise Control
a) Every possible measure or method shall be employed by the utility contractor to
minimize the effects of noise from equipment and pumps to include mufflers,
baffles, etc. Special effort shall be made to exercise noise abatement between
sunset and sunrise.
10.0 Provision for Temporary Sanitary Facilities
a) The utility contractor shall provide, maintain, and remove, when no longer
required, an adequate number of temporary, prefabricated, chemical -type toilets
with proper enclosures for the use of workmen during construction.
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September 2012 Brunswick County Engineering Department Revision 1.00
11.0 Dust Control
a) The utility contractor shall conduct operations and maintain the work area in such
a way as to minimize the creation and dispersion of dust. Water dispensing
equipment may be required to reduce dust.
12.0 Temporary Water
a) The utility contractor shall make all necessary arrangements for all water required
during the entire construction period for pressure testing, flushing, dust control,
and other requirements. Water needed for flushing and pressure testing may be
provided at the discretion of the County.
b) The utility contractor is responsible for coordinating with the County regarding
the need for temporary construction water. System valves on the existing County
water system shall not be operated by the utility contractor without the
permission of County staff.
c) Hydrant meters are available from Public Utilities — all applicable rates and fees
apply and must be paid by the utility contractor for the use of a hydrant meter.
All hydrant meters must have an approved backflow prevention device attached to
the hydrant meter to prevent cross contamination of the County's water
distribution system. Contact Public Utilities for additional information on the use
of hydrant meters for temporary water.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 009
SEDIMENTATION AND EROSION CONTROL
1.0 General
a) The intent of this specification is to provide guidance on all measures necessary
for effective erosion and sedimentation control within the construction limits of
the project, and for prevention of sediment laden runoff leaving the construction
limits or entering ditches, streams or water impoundments.
2.0 Utility Contractor's responsibility
a) The utility contractor agrees to meet all of the conditions of the NCDEQ issued
Sedimentation and Erosion Control Permit for land disturbing activities, and shall
be responsible for prevention of damage to properties outside of the construction
limits from siltation due to construction of the project.
b) The utility contractor shall assume all responsibilities to the affected property
owners for correction of damages which may occur. The utility contractor further
agrees to assume all responsibilities for fines or damages accessed against the
County by any regulatory agency or individual due to lack of proper erosion and
sediment control during construction.
c) The County reserves the right to withhold all submitted pay requests if erosion
and sedimentation measures are not satisfactory. The County also reserves the
right to withhold a portion of the Contractor's pay requests sufficient to pay any
and all assessed fines as required.
3.0 Construction Sequence
a) While the use of erosion and sedimentation control devices is especially important
on areas of steep topography, easily erodible soils, and sites in close proximity to
water courses throughout the construction period, the control measures shall be
installed prior to the commencement of land clearing and shall be fully
maintained and periodically inspected until final restoration and stabilization is
completed. Unrestored cleared areas shall be kept to a minimum. Disturbed areas
ahead of construction shall only be accomplished on those segments for the
shortest practical distance as required for continual progress.
b) Final restoration shall not be delayed until completion of the project but will
be carried out in phases as the work proceeds. Under no circumstances will
any areas be left unrestored for more than thirty (30) thirty calendar days without
some form of stabilization until final restoration is complete.
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September 2012 Brunswick County Engineering Department Revision 1.00
4.0 Sedimentation Control Measures
a) Sediment control devices or measures which may be required to prevent
sedimentation of streams, water courses, or drainage structures are:
Earth berms and/or diversion and intercept ditches
Sediment traps
Filter berms
Filter inlets
Silt fences - not to be placed in streams or ditches perpendicular to flow
Check dams gravel filter
Gravel construction exits
5.0 Erosion Control Measures
a) Erosion control measures which may be required are:
Earth slope protection
Diagonal water breaks diversion berms
Diversion channels
Preservation of existing vegetation
Storm inlet protection
Stream crossings
Energy dissipaters
Matting of re -seeded areas
6.0 Detail Drawing and Additional Measures
a) Sedimentation and erosion control details are shown in the plans for installation at
locations designated or as otherwise required by the regulating agency or by
direction of Brunswick County or Engineer as work proceeds. If significant
sedimentation is occurring as a result of activity on the construction site, despite
the application and maintenance of prescribed protective measures, the utility
contractor shall be required to take additional protective measures.
7.0 Stream Protection
a) Where construction activities are necessary in close proximity to streams and
other waterways, they shall be performed in a manner that does not contribute to
degradation of or blockage of the stream -flow. In order to prevent possible
degradation or blockages, the utility contractor shall be required to:
1) Keep all construction debris, excavated materials, brush, rocks, refuse, and
topsoil as far from these waterways as possible. Restrict machinery
operation or stream crossings in waterways to the extent necessary for
construction of utilities crossings.
2) If construction work areas are necessary in a waterway, they shall be
protected as indicated on the approved plans.
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September 2012 Brunswick County Engineering Department Revision 1.00
3) If temporary roadways are essential for the construction activities, they
shall be constructed of soils which are not highly erodible materials and
must not span more than half way across the water course or wetland area
at any one time unless otherwise approved by the Engineer.
These temporary roadways shall be entirely removed as soon as their
requirement is met. Work in these areas shall follow the requirements
of the Corp of Engineers or CAMA permit or plans as applicable.
8.0 Construction Access
a) The travel of equipment to and from the construction areas shall be minimized not
only to protect areas that will not be denuded, but also to prevent the spreading of
sediment within and outside of the construction areas. Therefore, special
construction equipment travel corridors will be established for this use and
instructions shall be issued for their use. Use of these corridors shall be fully
enforced. Other non -essential traffic will be restricted or discouraged.
Indiscriminate and convenience traffic shall not be allowed.
9.0 Stockpile, Laydown, and Borrow Areas
a) The utility contractor shall be responsible for selecting, obtaining, and
maintaining all required stockpile, laydown, or borrow areas needed for the
project. He is also required to design and incorporate all necessary sediment
and erosion controls measures necessary to prevent erosion and runoff of
sediment to adjacent areas.
b) For County capital improvement (CIP) projects it is required that a fully executed
copy of any and all agreements between the contractor and private property
owners be provided to the County for the project file. The County is not, and shall
not be, a party to any private agreements that the contractor enters into with a
private property owner for stockpile, laydown, and borrow areas.
c) The utility contractor is responsible for obtaining all necessary permits or
approvals for these areas outside the construction limits.
10.0 Disposal of Excess Water from Excavations
a) The utility contractor shall practice proper management of any excess water
pumped from excavations to minimize the production and spreading of sediment.
Pumped water shall be discharged onto stabilized surfaces and allowed to filter
through existing vegetation if possible; otherwise, additional control measures
may be necessary. If ditches are required to remove pumped water from
construction excavations, they shall be given the same consideration as any
other man-made waterway and shall be stabilized so as to not degrade and
produce sediment.
b) The utility contractor is responsible for understanding and complying with all
conditions contained within a NCDOT encroachment permit for work in the
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September 2012 Brunswick County Engineering Department Revision 1.00
public rights -of -way concerning the pumping of excess water from excavations
and the use of drainage ditches in the rights -of -way.
11.0 Excavation and Backfill
a) Excavations shall be closely controlled and all the material removed from them
shall be selectively stockpiled in areas where a minimum of sediment will be
generated and where other damage will not result from the piled material.
b) Drainageways shall be protected at all times and the placement of material in
drainageways for convenience shall not be allowed.
c) Backfilling operations shall be performed in such a manner that remaining trees
are not damaged. Temporary repaving shall be placed promptly after backfill
operations are completed in improved areas.
12.0 Dust Control
a) The utility contractor shall control dust throughout the project duration, within the
project area, and at all other areas affected by the construction of the project.
Dust control shall not be considered effective where the amount of dust creates a
potential or actual unsafe condition, public nuisance or condition endangering the
value, utility or appearance of any property.
b) The utility contractor will not be directly compensated for any dust control
measures necessary, as this work will be considered incidental to the work
covered by the various contract items.
13.0 Removal of Sediment and Erosion Control Devices and Final Grading and Seeding
a) After the construction phase is complete permanent vegetation of the areas that
have been disturbed shall be re-established as rapidly as possible. If the
completion of the construction activities do not coincide with a season in which
permanent vegetation can be generated, an interim or temporary program is
required. Once disturbed areas have been stabilized adequately, the utility
contractor shall dismantle and remove sediment and erosion control devices used
during construction and dress up and seed these areas.
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October 2021 Brunswick County Engineering Department Revision 1.02
Technical Specification 010
AS -BUILT (RECORD) DRAWINGS
1.0 General
a) It is the intent of this specification to provide information to the design engineer
and utility contractor concerning requirements for acceptable record drawings for
all projects with infrastructure permitted in the county's name.
b) Accurate as built drawings are an important closeout component of a project and
are required for:
• Signing water, sewer, and pump station state permit certifications
• Issuance of Substantial Completion and Final Acceptance
• Updating the county water and sewer GIS utility map
Water and / or sewer certifications submitted by the design engineer of
record will not be processed without approved as built record drawings that
conform to this specification regardless of who prepares the record drawings.
2.0 Record Drawings
a) The utility contractor is responsible for employing the design engineer and/or a
surveyor licensed in the State of North Carolina to provide accurate record
drawings upon completion of construction. The record drawings must be sealed,
signed, and dated by the engineer or land surveyor.
b) The record drawings shall be provided to the county as: One set of paper
drawings and a CD or USB drive containing both georeferenced AutoCAD
(Version 2007 or later) and Adobe PDF format files. The PDF files must be of
each individual plan sheet of the record drawings.
c) Record drawings shall conform to this as built technical specification and will
also accurately identify the location of all properties, rights -of -way, and
easements utilized for the installation of all installed facilities. Record drawings
will utilize offsets and benchmarks as necessary to identify the location of all
facilities correctly and accurately within the properties, rights -of -way, or
easements, and will also indicate any and all encroachments which exist. All
aboveground structures such as manholes, fire hydrants, valve boxes, meter
boxes, electrical services, pump stations, air release valves, etc., will also be
clearly identified.
d) Horizontal control shall be per the State Plane Coordinate System (NAD 83).
e) Vertical control shall be per NAVD 88.
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October 2021 Brunswick County Engineering Department Revision 1.02
Plan sheet size: 24" x 36" (Arch D) with engineer's seal and / or surveyor's seal as applicable
Each sheet of the record drawings, including the required Brunswick County Cover Sheet, shall
have the NCDEQ PWSS water permit number and / or the NCDEQ DWQ sewer permit number
for the project on the sheet.
Drawings shall be prepared at a scale of 1" = 50' (horizontal) and 1" = 5' (vertical)
Indexed Brunswick County Cover Sheet with: Location of plan -profile sheets by sheet number,
name of project and/or subdivision, owner's name, address, phone number, engineer's name,
address, phone number, surveyor's name, address, phone number, date, north arrow, scale, site
map of project site shown as an inset (minimum size 3" x 3")
Total linear feet of mains shown on cover sheet as:
Water Mains Force mains
Gravity sewer mains
Gravity sewer shall be shown in both plan and profile view with all manhole inverts accurately
field located and labeled in profile view and a manhole name and/or number assigned to each
manhole. Manhole rim and invert elevations shall be accurately located and shown. If applicable
clearly indicate and label all five (5) foot diameter manholes. All sewer mains and manholes
shall have stationing numbers for ease of reference.
Plans shall show individual services for gravity sewer cleanouts, water meter boxes, and low-
pressure sewer services and shall be accurately located and shown on the plans as follows:
Gravity sewer cleanout — open circle
Water meter service — open box
Low pressure sewer — open oval
Clearly indicate all gravity sewer service laterals and indicate their size (4 inch or 6 inch)
Gravity sewer cleanouts shall be located by measuring from the nearest downstream manhole
along the sewer main upstream to a point which lies on a line that is perpendicular to the sewer
main and connects said point and the cleanout — for example, 150 / 15R (150' from downstream
manhole and 15' over to the right side of main)
Water taps and meters larger than the standard one (1) inch lateral with (3/4) inch meter shall be
clearly identified with the size of the service lateral and water meter
Drawings shall indicate water and sewer phases and their relationship to other subdivision phases
(if applicable)
Use complete and accurate material descriptions, for example, pipe material (PVC, DIP, HDPE,
Fusible PVC, etc.), pipe diameter, DR # of pipe, pressure class of any DIP, length, slope (for
gravity sewer), AWWA and / or NSF
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October 2021 Brunswick County Engineering Department Revision 1.02
Show station or distance to beginning and end of all changes in pipe material and pipe
deflections
Show all existing and required vertical and horizontal separations between sewer mains and
water mains and between water mains / sewer mains and stormwater pipes
Show existing grade elevations and proposed finish grade elevations
Show all water supply wells within a one hundred (100) foot radius of any gravity sewer main or
pressure force main
If any vented manholes were used [eg, rims less than (2) feet above 100-year flood elevation]
then show the vented manhole and vent and indicate a watertight ring and cover
Show location and size of all air release valves, gate valves, plug valves, butterfly valves, fire
hydrants, post flushing hydrants, temporary blow offs, tees, crosses, cleanouts, etc., along all
water mains and sewer force mains
Show lot numbers, lot lines, easement lines, rights -of -way lines, and street names
For horizontal directional drills and jack -and -bores the drilling logs are to be incorporated with
the record drawings
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 011
DEWATERING
1.0 General Dewatering Requirements for Utility Work
a) All ground water which may be found in the trenches and any water which may
get into them from any cause whatsoever shall be pumped or bailed out so that the
trench shall be dry during all pipe laying periods.
b) All water pumped from the trenches shall be disposed of in compliance with the
applicable local regulations of the appropriate governing body, and in accordance
with all issued permits for the project.
c) If dewatering operations cause a turbidity problem due to suspended sands or silts
in the water it shall be the utility contractor's responsibility to utilize adequate
methods to prevent unacceptable turbidity discharges, such as the use of a
filtration sock or other methods.
d) Any damage to property, or notices of violation from NCDEQ, shall be the utility
contractor's responsibility to correct to the satisfaction of the Engineer at no cost
to Brunswick County. All fines imposed by NCDEQ shall be paid by the utility
contractor.
e) The contractor shall be required to well point, pump, or provide other measures
necessary to keep the trench dry during pipe laying operations.
f) The use of large amounts of crushed stone is not an approved dewatering method.
g) Dewatering operations shall be maintained until all backfilling and compaction is
completed or as directed by the Engineer or County staff.
h) No water shall be permitted to reach any poured concrete until it has sufficiently
hydrated to a minimum strength such that water will not affect the cured concrete
strength.
i) The contractor shall provide and place all necessary flumes or other channels of
adequate size to carry temporarily all streams, brooks, stormwater or other water
which may flow along or across the lines of the pipe line. All flumes or channels
thus utilized shall be tight so as to prevent leakage into the trenches.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 012
TRENCH BOXES, SHEETING, AND SHORING
1.0 Sheeting and Shoring
a) Trench boxes, sheeting, shoring, and bracing shall be utilized as needed by the
utility contractor during the installation of utility infrastructure in order to protect
human life, prevent accidents, maintain trench integrity during pipeline laying
operations, prevent damage to buildings or other structures along the line of
construction, and to ensure a quality installation.
b) The contractor is responsible for all aspects of using trench boxes, sheeting, and
shoring during the project. Care must be taken not to damage in any way water
mains, water service pipes, drain pipes, sanitary or stormwater sewers, sewer
service pipes, gas mains, oil mains, electric conduits or other structures
encountered on the line of the work during trench excavation.
c) Special conditions of an NCDOT Encroachment Permit may require the use of
sheeting and shoring while working in the DOT rights -of -way. The Engineer is
responsible for the design and approval of any sheeting and shoring required by
NCDOT.
d) Only shoring authorized by the Engineer and approved by the Engineer shall be
left in place. For shoring left in the public right-of-way the utility contractor must
also obtain NCDOT approval.
e) Whenever timber or other sheeting is driven to a depth below the elevation of the
top of the pipe, that portion of the sheeting below the elevation of the top of the
pipe shall not be disturbed or removed. Whenever timber or other sheeting is
driven for the protection of trench walls in water -bearing soil, no portion of such
sheeting below a level of 4 feet over the top of the pipe shall be removed.
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July 2015 Brunswick County Engineering Department Revision 1.01
Technical Specification 013
EXCAVATING, GRADING, TRENCHING, & BACKFILLING
1.0 General
a) The utility contractor shall furnish all labor, equipment, and materials for all
excavation, grading, trenching, and backfilling associated with the installation of
water, sewer, pump stations, drainage structures, curb and gutter, streets, sidewalks,
driveways, slopes, storm drainage, and other associated infrastructure within the
limits of the project work area. All work done shall be in accordance with the
approved plans and specifications.
2.0 Existing Conditions and Utility Locations
a) It is the utility contractor's responsibility to perform all site inspections to
familiarize himself with the scope of work involved and the existing conditions at
the project site.
b) The contractor is responsible for locating all existing underground utilities in the
area of work. If utilities are to remain in place then the contractor shall provide
adequate means of protection during earthwork, excavating, trenching, and
backfilling operations.
c) Should unlocated, or incorrectly located, piping or other utilities be encountered
during excavation the utility owner shall be notified immediately. The utility
contractor shall cooperate with the County and other respective utility companies
to protect and keep respective services and facilities in operation. The contractor
shall also repair any damaged utilities to the satisfaction of the utility owner.
d) Barricade all open excavations occurring as part of this work and post with warning
signs and /or lights. Continuously operate all warning lights as recommended by
the Authority Having Jurisdiction (AHJ). The utility contractor shall also protect
structures, utilities, sidewalks, pavements, and other facilities from damage
caused by settlement, lateral movement, undermining, washout, and other hazards
created by earthwork operations.
3.0 Technical Standards
a) ASTM C33 ---- Standard specification for concrete aggregates
b) ASTM D2487 - Classification of soils for engineering purposes.
4.0 Soil Classifications
a) Use soils free of debris, roots, wood, scrap material, vegetation, refuse, soft
unsound particles, organic matter, refuse, frozen materials, rocks and lumps greater
than 4 inches in diameter and other deleterious matter.
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July 2015 Brunswick County Engineering Department Revision 1.01
b) For the purpose of this specification, soils to be used as fill material are grouped
into five classes according to soil properties and characteristics:
Class I: Angular, 1/4 to 1-1/2 inch, graded stone, including a number of fill
materials that have regional significance such as coral, slag, cinders, and
crushed stone, crushed gravel, and crushed shells
Class II: Coarse sands and gravels with maximum practical size of 1-1/2 inch,
including variously graded sands and gravels containing small
percentages of fines, generally granular and non -cohesive, either wet or
dry. Soil Types GW, GP, SW, and SP are included in this class.
Class III: Fine sand and clayey gravels, including fine sands, sand -clay mixtures,
and gravel -clay mixtures. Soil Types GM, GC, SM, and SC are
included in this class.
Class IV: Silt, silty clays, and clays, including inorganic clays and silts of
medium to high plasticity and liquid limits. Soil Types MH, ML, CH,
and CL are included in this class. These materials are not
recommended for bedding, haunching, or initial backfill.
Class V: This class includes the organic soil, OL, OH, PT as well as soils
containing frozen earth, debris, rocks, larger than 40 mm (1-1/2 in.) in
diameter, and other foreign materials. These materials are not
recommended for bedding, haunching, or initial backfill.
5.0 Trench Excavation, Pipe Bedding, Backfilling, and Compaction for Utility Systems
a) Trenching of utilities as a method of installation is not allowed in Brunswick
County
b) Trench Excavation
1) Excavation shall be accomplished in accordance with the grades and lines
as established by the Engineer or Surveyor and as required by the work to
be performed. Excavation shall include the removal and replacement of all
asphalt, concrete, curb, rock, earth, fences, trees (as applicable), shrubs, and
other materials. The contractor will exercise care to prevent undercutting
lower than the required subgrade. All materials from excavation,
considered as suitable by this specification, shall be used as fill wherever
required, and the contractor shall arrange his work so that this usage of
excavated materials will be possible. Unsuitable and surplus materials from
the excavation, if any, shall be disposed of by the contractor at his expense.
All areas of the site shall be graded and maintained at all times to prevent
surface runoff from draining into the excavations and to prevent ponding of
water therein.
2) Excavated materials not required for topsoil, fill or backfill shall be
removed from the site of the work by the contractor, but none shall be
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July 2015 Brunswick County Engineering Department Revision 1.01
deposited on private property without written consent of the property
owner. For County capital improvement projects any agreements between
the contractor and private property owners must be provided to the County
also.
3) All excavations shall be in compliance with all current OSHA requirements
and it is the utility contractor's responsibility to ensure that the project work
is in compliance with all OSHA requirements.
4) All piping shall be installed at a minimum depth of 36 inches unless
otherwise approved by Brunswick County. Installations shallower than 36
inches, if approved, will require the use of ductile iron pipe.
5) Trenches for piping shall be excavated true to line and grade as shown on
the approved plans.
6) Trench widths at and below the top of the pipe shall be the minimum
necessary for proper installation. Trench banks above the top of the pipe
shall be as vertical as practicable. Overdepth excavation shall be backfilled
with Class I material and compacted.
7) The utility contractor shall provide, at his expense and as directed by the
Engineer, especially bedding material or concrete encasement as may be
necessary due to over -width excavation.
8) Trench depth to the lines and grades shown on the drawings. Where
elevations are not shown, trench to a depth sufficient to provide at least 36
inches of cover above the top of pipe, unless otherwise specified. Grade all
trenches to provide a constant slope free of sags and high spots. Recesses
shall be excavated where required to accommodate bells and joints.
9) Keep trenches free of water. Include cost of dewatering in unit price bid for
pipe. No separate payment for dewatering will be made by the County.
10) Properly brace sheet and support trench walls as soil conditions require and
in strict conformance with the approved plans, all pertinent laws, and OSHA
regulations. Provide adequate bracing and shoring to protect adjacent
improvements. Contractor shall provide certification for all
premanufactured trench bracing devices prior to any excavation activities.
c) Pipe Bedding
1) Gravity Sewer Mains — Refer to Brunswick County gravity sewer pipe
bedding Standard Detail:
Class A bedding: For gravity mains less than twenty (20) feet deep undercut
trench bottom six (6) inches minimum below pipe and fill with size #57
stone up to and including the springline of the pipe.
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July 2015 Brunswick County Engineering Department Revision 1.01
Class B bedding: For gravity mains greater than twenty (20) feet deep
undercut trench bottom six (6) inches minimum below pipe and fill with
size #57 stone to six (6) inches above the pipe.
2) Pressure Mains, Water or Sewer- it is not necessary to bed pressure mains
unless unusually wet or mucky field conditions are encountered. Pressure
mains shall be installed in properly excavated trenches on the native soil of
the trench. If wet or mucky field conditions are encountered then size #57
stone shall be used to provide a firm bedding but only at the direction of the
Engineer or County staff.
3) Service Pipe — bedding is not required on water and sewer service laterals
unless unusual conditions are encountered in the field. In these cases the
Contractor shall bed the service pipe per direction from the Engineer or
County staff.
d) Initial and Final backfilling
1) After properly installing the pipe and bedding, if required, trench backfill
shall progress as rapidly as pipe laying will permit.
2) Backfill materials shall be of suitable material and be capable of being
compacted to a minimum of ninety-eight (98) percent ASTM D698
(Standard Proctor) maximum density at optimum moisture content.
3) Initial and Final backfill shall be of the Type 1 or Type II material as
follows:
a) Type 1 Material: Excavated material from the trench or materials
from other sources which are free from large clods, roots or stones
larger than 1 inch may be used as initial backfill in trenches (see
Pipe Trench Detail).
b) Type 2 Material: Excavated material from the trench or materials
from other sources which are free from large clods, roots or stones
larger than 8 inches may be used as final backfill in trenches but
shall not be used in the final twelve (12) inches of fill (see Pipe
Trench Detail).
4) Backfill around the pipe by placing in layers no more than six (6) inches in
depth. Backfill shall be compacted with light tamps for the full width of the
trench to provide adequate support for the bottom and sides of the pipe.
Backfill shall be carried up evenly on both sides of the trench excavation.
Particular care is required in backfilling gravity sewer pipe to prevent
excessive pipe deflection.
e) Compaction
1) When existing plans and grades require the use of fill to reach the required
elevation, the contractor shall deposit suitable material from previously
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July 2015 Brunswick County Engineering Department Revision 1.01
excavated areas or use borrow material. Such material shall be free from
debris, roots, trash, stones, or other harmful substances, and shall be spread
in successive layers of loose material not more than six (6) inches in depth.
2) Each layer shall be spread uniformly by motor grader or other approved
device and rolled with an approved tamping or three -wheeled power roller
until thoroughly compacted to a minimum of ninety-eight (98) percent
ASTM D698 (Standard Proctor) maximum density at optimum moisture
content. Rolling with rubber tired vehicles or track type equipment will not
be allowed.
6.0 Crushed Stone
a) Crushed stone shall be size # 57 washed stone only
7.0 Concrete
a) Concrete placed for cradles, thrust blocks, or encasement shall be 3,000 psi
minimum strength at twenty-eight (28) days hydration.
8.0 Foundation
a) Foundation shall be required in wet, yielding and mucky locations. Foundation
shall be constructed by removal of wet, yielding or mucky material and its
replacement with sufficient Class I material to correct the instability. Foundation
shall only be installed with the approval of the Engineer or Brunswick County staff.
Undercutting and filling with stone will not be allowed or paid for in order to
control water in the excavation trench.
9.0 Undercutting
a) Undercutting, unless authorized by the Engineer, shall be replaced and compacted
at the contractor's expense. If the material, after excavation to subgrade, is found
to be soft, spongy or unfit for use as subgrade, such unsuitable material shall be
removed to a depth as directed by the Engineer and the subgrade shall be brought
to proper elevation by filling with suitable material from the excavation or from an
approved borrow site.
10.0 Borrow Material
a) The Contractor will supply all borrow material necessary and will provide all labor
and equipment necessary to dig and haul such borrow material. Any and all borrow
material utilized shall be of suitable quality and meet the requirements of this
technical specification.
11.0 Excess Water Control
a) Grade and maintain all areas of the site to preclude surface runoff into excavations
and prevent any water accumulation in the excavation.
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July 2015 Brunswick County Engineering Department Revision 1.01
b) Excavations should be kept free of surface water and/or groundwater. Provide and
maintain at all times the necessary means and devices to prevent water from
entering the excavations and for removing all water entering the excavations during
pipe laying operations. Dewatering shall continue until structure is backfilled and
compacted.
c) Include cost of dewatering in the unit cost for pipe. Separate payment will not be
made for dewatering operations by Brunswick County.
12.0 Contaminated Soils — Excavation, Removal, and Remediation
a) In the event that contaminated soils are suspected or encountered the contractor
shall stop digging in the suspect area and immediately notify both the Engineer and
Brunswick County staff.
b) It shall be the utility contractor's responsibility to hire a soils testing firm to
examine the suspect area for type and density of contamination. Should testing
confirm the presence of contaminated soils, the following steps shall be taken:
1) Excavate contaminated material in a manner consistent with all
jurisdictional regulations.
2) Immediately remove contaminated material from the site. Contaminated
materials may not be stockpiled for any amount of time.
3) Material is to be disposed of at a permitted facility. Tickets must be
produced to the Engineer and County staff accounting for every cubic yard
of material removed.
4) Per direction of the Engineer and / or Brunswick County, the pipe material
shall be changed to pressure class 350 DIP with Nitrile gaskets.
5) The trench is to be bedded and backfilled with select fill per Brunswick
County specifications herein.
13.0 Field Quality Control
a) Field inspection, sampling and testing will be performed as required at either the
direction of the Engineer or Brunswick County
b) If required, an independent soils engineering and testing laboratory shall perform
sufficient tests and inspection procedures, to the satisfaction of the Engineer and
the County, both in the field and lab to ensure that the provisions of this
specification are met. The testing shall be paid by the utility contractor. The testing
lab shall be approved by the Engineer and / or Brunswick County.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 016
CONCRETE CURBS, GUTTERS, DRIVEWAYS,
SIDEWALKS AND CATCH BASINS
1.0 General
a) It shall be the contractor's responsibility to furnish all plant, labor, equipment and
materials, and for performing all related activities necessary for the construction
and/or replacement of concrete curbs, gutters, sidewalks and driveways, and other
related concrete structures shown on the contract drawing or as removed by the
contractor during utility installation.
2.0 Materials
a) All concrete used shall be a minimum 3,000 psi standard strength mixture at
twenty-eight (28) days hydration.
b) Reinforcement: Reinforcing will generally not be required unless the project
plans call for reinforcing of a structure. In these situations reinforcement shall
conform to the approved plans and specifications by the Engineer or will be
reinforced at the direction of Brunswick County staff.
3.0 Alignment and Grade
a) Alignment and grades for replacement structures shall conform to the adjacent
structures unless otherwise specified by the Engineer and/or Brunswick County.
Alignment and grades for new concrete structures shall conform to the plans and
details designated on the drawings. Alignments and grades are the responsibility
of the contractor utilizing industry standard approved methods or as directed by
the Engineer. In the event any of the concrete structures placed are damaged from
any cause or prove defective in any way, or is out of alignment or grade, the
contractor shall remove such sections and replace at his own expense.
4.0 Excavation and Subgrade Preparations
a) Excavation and subgrade preparation for all concrete structures shall be in strict
compliance with the approved plans, Brunswick County Technical Specification
013 -Excavation, Grading, Trenching, and Back Win or as directed by the
Engineer.
5.0 Replacement Sections
a) Replacement concrete structures shall conform to the dimensions and shape of the
existing remaining structures except as otherwise stated herein. New structures
shall conform to the design and dimensions shown in the approved plans or as
directed by the Engineer and / or County staff.
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September 2012 Brunswick County Engineering Department Revision 1.00
6.0 Sidewalks and Driveways
a) All sidewalks shall be constructed or reconstructed to a minimum uniform
thickness of four (4) inches and to the width of the sections being replaced or, for
new sidewalks, to the width designated on the approved plans. All driveways
shall be constructed to a minimum uniform thickness of six (6) inches including
that section which crosses sidewalk areas, unless otherwise directed by the
Engineer and / or County staff. The driveway flared section at the road shall
conform to the exact dimensions and shape of that which was removed.
7.0 Construction Forms
a) Concrete Curb and Gutter Forms: Wooden or steel forms, satisfactory to the
Engineer, shall be used for the construction of curb and gutter. They shall be set
true to alignment and grade as required by the Engineer and substantially braced.
Metal templates, not more than three -sixteenth (3/16") inch in thickness, and
manufactured in accordance with the curb and gutter section, shall be set in the
places provided in the forms not more than ten (10') feet apart. The forms and
templates shall be thoroughly cleaned and oiled after each operation. Templates
shall be adjusted under the supervision of the Engineer so as to prevent short
sections (less than 5 feet).
b) When back and front forms have been set to exact grade and secured, the dividing
plates shall be inserted and trued up. With these forms as templates, fine grading
to exact subgrade elevation shall be completed by hand. Face forms shall then be
set. The contractor shall use every effort to observe any possible misalignments
in grades and shall call such to the attention of the Engineer promptly.
c) Sidewalks and Driveways Forms: Forms shall be of wood or metal, straight and
free from warp, and of sufficient strength to resist springing during the process of
depositing and consolidation of the concrete. The width of the forms for sidewalk
and driveways shall be equal to the full depth of the sidewalk or driveway. Forms
shall be securely staked and braced true to the line and grade set by the Engineer
in the approved plans. Suitable metal or wooden division plates shall be provided
to completely separate adjacent slabs during construction. Forms shall be clean
and well oiled before being set. Sidewalks shall be marked in sections with a
proper lining tool to form squares the size of which will depend upon the width of
the walks. The edges of driveways will be worked with an edging tool and will
be sectioned into squares or marked as directed by the Engineer.
d) Driveway construction joints shall not be spaced less than five (5) feet apart. In
no case shall the next expansion joint on the remaining drive be closer than 5 feet
from the new construction joint.
8.0 Construction
a) Concrete shall not be placed in any forms until the forms and subgrade have been
properly established per the approved plans.
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September 2012 Brunswick County Engineering Department Revision 1.00
b) Concrete Curb and Gutter Construction:
1) The forms for curb and gutter shall be placed in accordance with the
proper alignment and grade as directed by the Engineer in the approved
plans, and all attachments, templates, stakes, bracings, etc., shall be
securely set in place prior to depositing of concrete.
2) Careful check will be made of all forms prior to pouring and the contractor
shall obtain a visual inspection and approval of all forms prior to pouring
concrete therein.
3) When sufficient concrete has been placed in the forms, it shall be well
spaded along areas in contact with the forms in order to eliminate all
honeycombing and floated to the proper alignment and grade, after which
it shall be toweled smooth and very lightly brushed. Templates shall be
removed by stages, but not entirely until the concrete has become
thoroughly hard. After removal of the templates, there must be a clear
division throughout between these sections. Edging tools will be used to
form an edge along the back and front form and at each template.
4) All concrete pours shall terminate at a template. If pouring is to be
resumed within one hour or less, any excess concrete that exists after the
template has been reached may be spread in the bottom two (2) inches of
the gutter form adjoining the completed curb.
5) At catch basins, there will be a short section of gutter only, the curbing
being replaced by the casting. The catch basin casting shall be parallel
with, and on the grade of the back form of the curb and gutter section.
The gutter area shall be so shaped and sloped as to increase in slope
toward the curbing to an extent that when opposite the catch basin
casting, it will provide a minimum of eight (8") inch clear opening below
the casting top. This warped section at, and adjacent to, each catch basin
shall have the exact same finish texture as that of the other curbing
present and shall be poured at the same time where possible. A double ply
of 30-pound building felt shall be inserted on all sides of catch basin
casting covers that come in contact with any concrete. No felt shall be
placed against catch basin leg castings.
6) The use of excessive grout (mud) continuously along the curb and gutter
section will not be tolerated. The use of "mules" shall be limited to
obtaining the desired finish - they should not be allowed to alter the
section of the curb. No floating and little toweling should be necessary
against the curb face in order to obtain a true and proper section. Such
section should be obtained with the curb face form board, the alignment
of which must be extremely good.
7) The curb and gutter at street corners shall be constructed on a thirty-five
(35) foot radius unless otherwise instructed. At driveways the curb and
gutter shall be constructed on a four and one-half (4 '/2) foot radius unless
otherwise directed by the Engineer.
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September 2012 Brunswick County Engineering Department Revision 1.00
c) Sidewalks and Driveway Construction:
1) After the forms have been set, the contractor shall inspect the form for
proper line and grade and shall check the subgrade for proper compaction
before allowing any concrete to be placed.
2) All materials incorporated in this concrete shall conform to the
provisions as set out hereinbefore and shall be mixed and deposited
in accordance with the requirements of these specifications.
3) When sufficient concrete has been deposited in the forms it shall
be well "spaded" along all areas in contact with the forms in order
to eliminate all "honeycombing".
4) Sidewalks shall be "scored" (1" deep) in sections six feet or less in
width. If sidewalk is greater than six feet in width scoring shall be
as directed by the Engineer. All "scores" shall be straight and
rounded at the surface with the proper edging tool, or as directed
by the Engineer.
5) Expansion joints shall be installed for every 30 linear feet of
sidewalk, against all structures, pavement and curbs, and at such
other places as shown on the plans and details, or as directed by the
Engineer.
6) All concrete pours shall terminate at a template.
7) If pouring is to be resumed within one hour or less, any excess
concrete that exists after the template has been reached may be
spread in the bottom two (2) inches of the adjoining sidewalk
section.
8) All driveways shall be re -constructed to previous widths, depths,
and also with equal radii or angles at the street.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 017
ASPHALT PAVING
1.0 General
a) Brunswick County does not own and maintain any paved streets, roads, or parking
lots other than those that may be found on County owned property. Streets in
private subdivisions are designed by an Engineer working for a developer and are
generally designed and constructed to the NCDOT subdivision street standards
with regards to geometry and load bearing capability. These streets are owned
and maintained by either the developer or the HOA / POA.
b) The intent of this specification is to provide general direction to a contractor that
is installing asphalt paving on a County utility project, or at the County's direction
for street repairs, patching, drives, parking areas, or the final layer of asphalt
within an existing subdivision. It is not the intent of this specification to be a
design guideline for street construction — all street construction shall conform
with the plans and specifications prepared by an Engineer and with all applicable
NCDOT street design requirements.
c) The contractor shall provide all plant, labor, equipment, and materials in
connection with the construction of a hot -mix pavement consisting of a surface
course on a previously prepared base, or over an existing initial layer of asphalt,
or for minor street patching and repairs, complete, in strict accordance with this
specification and any applicable approved drawings prepared by the Engineer.
2.0 Surface Preparation
a) The base course shall be placed and constructed as required in the current North
Carolina Department of Transportation (NCDOT) Standard Specifications for
Streets and Roads.
b) All drainage structures and pipes shall be properly installed at the locations shown
on the plans.
c) The surface shall be graded to subgrade and compacted as specified by the
Engineer. Surfacing shall be finished by fine grading to the required lines, grades,
and sections, and by re -compacting the subgrade with heavy rollers.
d) The bituminous surface course shall be of the type as shown on the plans, and
shall consist of fine and coarse mineral aggregate and mineral filler uniformly
mixed with hot bituminous material placed and compacted on a prepared base
course to the depth specified or as shown on the plans.
e) Newly placed and compacted asphalt surface course shall be barricaded and
protected from all defects for a period of at least eight (8) hours until they have
become properly hardened by cooling. Only local traffic will be allowed to egress
and ingress.
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September 2012 Brunswick County Engineering Department Revision 1.00
f) The contractor shall maintain the pavement in an acceptable condition until final
acceptance of the project.
3.0 Adjustment of Existing Manholes and Valve Boxes
a) All existing manhole covers, monument boxes, valve boxes, sewer cleanout
boxes, etc., shall be adjusted to match the grade of the proposed overlay.
4.0 Cutting and Replacing Pavement for Utility Installation or Repairs
a) Pavement shall be neatly cut to a straight edge prior to trenching operations. The
cuts shall be made per the approved plans. Ragged and irregular edges shall be
redone. Concrete pavement shall be cut with suitable concrete saw cutting
equipment.
5.0 Pavement Replacement
a) Pavement shall be repaired within the same week that it is cut. If inclement
weather delays pavement replacement, the contractor shall not cut additional
pavement without specific approval from the Engineer or County staff.
b) The surface course shall be hot asphalt laid over the leveling or tack coat to the
compacted thickness as shown on the approved plans. After compaction, the
pavement surface shall be smooth and true to the established crown and grade.
Defects shall be neatly cut out and replaced. Sections of new pavement shall be
protected from traffic until the asphalt has properly hardened.
c) All settlement and damage occurring during construction and the warranty period
shall be repaired by the contractor at his cost.
6.0 Warranty
a) The warranty period for asphalt paving shall be one (1) year from the date of
acceptance by Brunswick County.
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March 2019 Brunswick County Engineering Department Revision 1.13
Technical Specification 018
WATER DISTRIBUTION SYSTEM
1.0 General
a) It is the intent of this specification to ensure that all water system infrastructure
constructed within the service area of the Brunswick County Public Utilities
Department meets or exceeds all local, state, and federal rules and regulations as
applicable. This specification also provides technical guidance to contractors
and engineers to ensure that all water system infrastructure is properly
constructed, tested, chlorinated, and placed in service to protect the public.
2.0 Materials and Requirements for Water Mains
a) General
1) To the maximum extent possible all materials shall be manufactured in the
United States. This includes all pipe, valves, fittings, hydrants, meter
boxes, etc.
2) All pipe material shall be marked with the manufacturer, type, class,
thickness, and date of production in lettering legible to the Engineer and
County staff.
3) The engineer is responsible for reviewing all shop submittals for approval.
County staff may assist as needed to answer any questions concerning
material suitability.
4) All piping material must have a minimum pressure rating of one and one-
half (1.5) times the normal working pressure of the pipe.
5) All pipes, valves, hydrants, fittings, etc., must conform to the applicable
AWWA standards.
6) Water mains shall be constructed of AWWA C900 PVC, minimum DR-
18, except when DIP, HDPE, or Fusible PVC mains are required.
7) All pipes shall be shipped with gaskets installed inside the pipe bell.
8) Water main installation shall conform to AWWA C600: Standard for
Installation of Ductile Iron Pipe (DIP), or AWWA C605: Standard for
Installation of Polyvinyl Chloride (PVC) pipe
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March 2019 Brunswick County Engineering Department Revision 1.13
b) Ductile Iron Pipe (DIP)
1) All sizes of pipe shall be manufactured to a nominal laying length of 18'-
0" to 20'-0", except to make adjustments for bends, tees, and other fittings.
2) DIP shall conform to ANSI / AWWA C150 / A21.50 and ANSI / AWWA
C151 / A21.51, with interior cement mortar lining and an exterior
asphaltic coating for corrosion resistance.
3) Cement mortar linings shall conform to ANSI A21.4 / AWWA C104.
4) DIP that has an interior lining of Protecto 401 (or equivalent) for use in
sewer systems shall not be permitted on potable water systems.
5) Joints shall be the push -on or mechanical joint type conforming to ANSI /
AWWA C111 / A21.11 as modified by ANSI / AWWA C151 /
A21.51.
6) Fittings and specials shall be cast or ductile iron conforming to ASNI
2 1. 10 and shall be rated for one hundred and fifty (150) pounds per square
inch minimum pressure.
7) Wall thickness shall be in accordance with Table 51.1 of ANSI/AWWA
C151/A21.51 with working pressure of one hundred and fifty (150) psi.
Final pipe class shall be determined based on specific structural
calculations as they relate to conditions encountered during design.
Brunswick County reserves the right to designate the final pipe
thickness.
a) (4) inch — (12) inch diameter pipe: minimum pressure class 350
b) (14) inch — (20) inch diameter pipe: minimum pressure class 250
c) (24) inch pipe: minimum pressure class 200
d) Flanged pipe shall be minimum pressure Class 53
8) Rubber gaskets and lubricant shall conform to ANSI/AWWA
C111/A2L11.
9) No metric sized pipe shall be permitted.
10) In corrosive, contaminated, and dredged soils, DIP and all fittings shall be
wrapped in a polyethylene encasement per ANSI / AWWA A21.5 / C105
Polyethylene Encasement for Ductile Iron Pipingfor Water and Other
Liquids. All fasteners shall be stainless steel Type 304, minimum grade.
11) Acceptable products are American Cast Iron Pipe Company, Griffin Pipe
Company, U.S. Pipe Company, or approved equal.
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March 2019 Brunswick County Engineering Department Revision 1.13
c) Polyvinyl Chloride Pipe PVC
1) All sizes of pipe shall be manufactured to a nominal laying length of 18'-
0" to 20'-0" except to make adjustments for bends, tees, and other fittings.
2) Two (2) inch PVC mains shall be SDR-21, gasketed pipe, in accordance
with ASTM D2241 and shall bear the seal of the National Sanitation
Foundation (NSF).
3) Four (4) inch through twelve (12) inch PVC mains shall be AWWA C900
Class 150 (DR-18) and shall bear the seal of the NSF. Joints shall
conform to ASTM D3139 or ASTM D3212.
4) Fourteen (14) inch through thirty-six (36) inch PVC mains shall be
AWWA C900 Class 235 (DR-18) and shall bear the seal of the NSF.
Joints shall conform to ASTM D3139 or ASTM D3212.
5) PVC mains shall be manufactured with PVC material conforming to PVC
1120.
6) Fittings shall be molded PVC with joints similar to the PVC pipe.
Fabricated fittings using solvent welded joints are not acceptable.
Fittings may also be DIP fittings listed and approved for use with PVC
pipe and shall have a cement mortar lining on the interior and an asphaltic
coating on the exterior for corrosion resistance.
7) All PVC water mains shall be factory dyed industry standard blue.
8) Push on joints shall conform to ASTM D3139 with an elastomeric gasket
and the joint pressure rating shall not be less than the pipe pressure
rating.
9) In corrosive, contaminated, and dredged soils, all fittings shall be wrapped
in a polyethylene encasement per ANSI / AWWA A21.5 / C105
Po yethylene Encasement for Ductile Iron Piping for Water and Other
Liquids. All fasteners shall be stainless steel Type 304, minimum grade.
10) Acceptable products are Diamond Plastics Corporation, J M Eagle
Manufacturing Company, National, Certainteed, North American, or
approved equal.
d) Fusible Polyvinyl Chloride (Fusible PVC)
1) Fusible PVC pipe shall be in the four (4) inch to thirty-six (36) inch
diameter range.
2) Fusible PVC shall be AWWA C900 with National Sanitation
Foundation (NSF) certifications NSF— 61 and NSF — 14.
3) Fusible PVC shall conform to ASTM cell classification 12454.
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March 2019 Brunswick County Engineering Department Revision 1.13
4) Fusible PVC shall have a minimum safety factor of two (2.0).
5) Fusible PVC shall be joined by the thermal butt fusion method in
accordance with ASTM F-1674 and D-638.
6) Four (4) through twenty-four (24) inch Fusible PVC (DIPS) shall be
minimum DR-18.
7) Thirty (30) inch Fusible PVC (DIPS) shall be DR-25.
8) Thirty-six (36) inch Fusible PVC (DIPS) shall be DR-32.5.
9) All Fusible PVC water mains shall be factory dyed industry standard blue.
10) Fittings and specials shall be as stated in Section (4.0) of this
specification.
11) Acceptable products are Fusible PVC TM by Underground Solutions, Inc.
e) High Density Polyethylene Pipe (HDPE)
1) HDPE mains shall be high density polyethylene conforming to AWWA
C906 with PE 4710 materials and shall conform to ASTM F714
specification for HDPE pipe.
2) HDPE shall be joined by the thermal butt fusion method in accordance
with ASTM D3261.
3) HDPE shall be minimum DR-9 rated at a minimum two hundred (250)
pounds per square inch.
4) All HDPE water mains shall have a factory standard blue stripe on the
pipe.
5) Fittings and specials for HDPE mains shall be per the HDPE
manufacturer's recommendations and shall be submitted as shop
submittals by the utility contractor to the engineer for review and approval
prior to use. All fittings and specials shall conform to ASTM D3350 for
fittings materials.
6) HDPE used for horizontal directional drills (HDD) shall have the pipe
diameter increased in order to maintain equivalent inside diameter as the
open cut installed pipe it connects to.
7) Acceptable products are Mono -Line Pipe System by Joseph T. Ryerson
and Sons, Inc.; Driscopipe 1000 by Phillips Products, Inc.; Sclairpipe by
Dupont of Canada; JM Manufacturing Company Inc. or approved equal.
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March 2019 Brunswick County Engineering Department Revision 1.13
3.0 Materials and Requirements for Water Services
a) Water services that are less than fifty (50) percent of the outside diameter of the
supplying main may utilize a wide band body tapping saddle. All other water
service connections shall use a tapping sleeve.
b) One (1) inch service lines and tapping saddles — three quarter 3/4, inch &
one (1) inch meters
1) Service line piping shall be minimum one (1) inch diameter for (3/4) and
(1) inch water meters and shall be HDPE tubing, SDR 9, 200 psi,
conforming to ASTM D2737 / AWWA C901. No joints are allowed on a
service line between the main service tap and the meter stop.
In proven contaminated soils the service line shall be Type K copper
with rated and approved gaskets for contaminated soils.
2) Service saddles shall be wide band body service saddles, ACIPCO, US
Pipe, McDonald, Mueller, Smith Blair, Ford, JCM, Romac, or approved
equal. All fasteners shall be minimum high strength alloy steel.
3) Size of tap shall match that of the service line (1-inch minimum tap).
4) The corporation stop shall have AWWA inlet threads, ball type, outlet
connection to be CTS /OD, conductive compression type (grip nut). Size
of corporation stop shall match that of service line (1-inch minimum).
Corporation stops shall be Mueller B 25028, Ford —Ball Corp FB 1100 or
1000, McDonald — Ball Corp 4704 —BT, or approved equal.
c) Two (2) inch service lines and tapping saddles — one and one-half (1.5,) inch &
two (2) inch meters
1) Services shall be two (2) inch diameter for one and one-half (1.5) inch and
two (2) inch water meters and shall be HDPE tubing, SDR 9, 200 psi,
conforming to ASTM D2737 / AWWA C901. No joints are allowed on a
service line between the main service tap and the meter stop.
In proven contaminated soils the service line shall be Type K copper
with rated and approved gaskets for contaminated soils
2) Service saddles shall be wide band body service saddles, McDonald 3800
series, Mueller H 13000 or DR 2S series, Smith Blair 317, Ford FC 202,
JCM 406, Romac 202, or approved equal. All fasteners shall be minimum
high strength alloy steel.
3) Tapping valve shall be a two (2) inch, resilient wedge gate valve, Mueller
A 2360, or approved equal, installed with a valve box and concrete collar
per County Standard Detail.
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March 2019 Brunswick County Engineering Department Revision 1.13
4) Large meter boxes with meter setters are required for one and one-half
(1.5) inch and two (2.0) inch water meters and shall be provided by the
contractor and shall accommodate the Sensus AMR/AMI water meter. The
contractor shall submit the proposed large meter box and lid to the
Engineer for approval prior to installing the meter box.
d) Four (4) inch service lines — three (3) inch & four (4) inch meters
1) Service lines shall be four (4) inch diameter for three (3) inch and four (4)
inch water meters and may be HDPE, DIP, or PVC material conforming to
technical specifications for these materials per Section (3.0) of this
Specification. Water meters three (3) inch and larger shall be installed in a
meter vault per County Water Standard Details — Large Meter Vaults.
2) Tapping sleeves are required per County Standard Details. Tapping
saddles are not allowed on any services larger than two (2) inch. See
Section (12) of this specification for tapping sleeve information. All
fasteners shall be minimum high strength alloy steel.
e) Services for water meters larger than four (4) inch shall be sized to match the
installed meter size.
f) All services shall be installed as shown on the approved plans and the tap shall be
made perpendicular to the main and run straight to the meter box or vault.
Variations from this requirement due to field conditions are only by approval of
the County in advance of installation.
g) Locating wire is required on water services and water mains. See Section (14) of
this specification for locating wire information.
h) Service taps shall be made at the 10:00 o'clock or 2:00 o'clock position on the
water main. Service taps shall be staggered from one side of the main to the other
with a minimum distance of eighteen (18) inches between taps. Taps are to be a
minimum twenty (20) inches apart if made on the same side of the main.
i) Services shall not be installed by the contractor until all the mains have passed
hydrostatic testing, cleaning, and chlorination results are satisfactory and provided
to County staff.
j) No taps are allowed on a fire hydrant leg.
k) No taps are allowed where rodding is in place.
1) No burned taps are allowed.
m) No taps are allowed on horizontally directionally drilled (HDD) pipe.
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March 2019 Brunswick County Engineering Department Revision 1.13
n) Brunswick County Public Utilities is standardizing on the Sensus AMR / AMI
water meter. Water meters shall be Sensus AMR / AMI, or approved equal, and
shall be provided with the MXU unit and touch read pad.
o) Water meter boxes for standard 5/8" x 3/4"' water meters shall be:
Single Meter Boxes:
Ford
LYLV 141-243-TP-NL
McDonald
776-208PC2G437
Mueller
H-1462-K
1) Or approved equal — all boxes must accommodate the Sensus water meter
with AMI/AMR technology to include the MXU unit and touch read pad
2) Water meter boxes for meters larger than 5/8" x 3/4" shall be provided by
the contractor and sized appropriately for the meter being installed
Double Meter Boxes:
Ford DGHC 118-C 14439-002-NL
McDonald 773N208BCGP 434TCX00I
1) Or approved equal — all boxes must accommodate (2) Sensus 3/4-inch water
meters with AMI/AMR technology to include the MXU units and touch
read pad.
p) All new residential subdivisions that have county public sewer shall install a
double water meter box, or two single gang meter boxes, on the one (1) inch
service lateral on each lot to accommodate an irrigation meter for separate
billing purposes — refer to county water standard detail for water services.
q) Water meters shall be in non -traffic areas. Driveways shall not be formed around
meter boxes and the nearest distance from the meter box to the driveway shall be
no less than eighteen (18) inches.
r) Large water meter vaults shall be per the County Standard Details for meter
vaults. Quazite or G1asMasters polymer concrete enclosures, minimum Tier 22
rating for both the box and lid, are an approved "or equal" to a standard concrete
vault. Contact County Engineering with any questions concerning large water
meter vaults.
4.0 Materials and Requirements for Fittings and Specials
a) Fittings and specials shall be class (54) ductile iron per ANSI / AWWA A21.11 /
C111, ANSI / AWWA A21.53 / C153, and ANSI / AWWA A21.51 / C151,
minimum class 350 for (18) inch and smaller fittings and minimum class 250 for
(20) inch and larger fittings.
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March 2019 Brunswick County Engineering Department Revision 1.13
b) Profiles of fittings and specials may have special dimensions as required by the
pipe manufacturer.
c) Ductile iron fittings and specials shall be cement mortar lined per ANSI / AWWA
A21.4 / C 104 and have an asphaltic coating on the exterior for corrosion
resistance.
d) No metric sized fittings shall be permitted.
e) All fittings to be shipped with gaskets, glands, nuts, and bolts unless specified
otherwise. Nuts and bolts shall be high strength alloy steel.
5.0 Materials and Requirements for Restrained Joints, Piping, and Fittings
a)
b)
c)
d)
e)
Restrained joints are required to prevent movement of system piping caused by
forces in or on buried piping, tees, valves, branches, bends, plugs, etc.
Restrained joints shall be installed as shown on the approved plans, standard
details, or as directed by county staff or the Engineer.
Concrete thrust blocking shall be installed as shown on the approved plans,
standard details, or as directed by county staff or the Engineer.
All carrier pipe installed inside a casing shall be pressure class 350 ductile iron
pipes per county standard details with restrained joints.
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) Install restraints in strict accordance with the manufacturer's
recommendations.
2) 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 aforementioned boltless, integral, positive locking restraint
systems are also acceptable for use in open cut pipe installations.
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March 2019 Brunswick County Engineering Department Revision 1.13
3) 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
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) 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/CI I I 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.
5) 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/
CI I I 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.
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
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March 2019 Brunswick County Engineering Department Revision 1.13
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 Materials and Requirements for Pipe Couplings — 4 inches and larger
a) Provide couplings where needed to make piping connections.
b) Provide full-length, mechanical joint, ductile iron solid sleeve with twelve (12)
inch minimum length.
c) Provide ductile iron cut -in sleeve with mechanical restrained joints where
installing fittings in an existing line.
7.0 Materials and Requirements for Fire Hydrants
a) Hydrants shall be the dry barrel type with breakaway flange, shall open left only,
conforming to AWWA Standard C502, latest revision, with a six (6) inch
mechanical joint connection on the inlet end, minimum four and one-half (4.5)
inch valve opening, and two (2.5) inch hose connections and one (4.5) inch
pumper connection, all with American National Standard fire hose coupling
threads.
b) Hydrants shall have breakaway barrel and operating stem with barrel length for
three (3) foot main cover, six (6) inch bottom hub, and one and one-half (1.5) inch
solid operating nut with O-ring seals.
c) Main valve seat shall have bronze to bronze threads into the hydrant shoe.
Hydrant shall be grease lubricated with a thrust bearing to reduce operating torque
or may be oil lubricated.
d) Hydrants shall be rated at one -hundred —fifty (150) psi working pressure and
three -hundred (300) psi test pressure.
e) Hydrants shall be shop painted chrome yellow Tnemenc paint (or approved equal)
and shall be touched up after installation and given one (1) field coat of chrome
yellow enamel. If the hydrant is painted with color other than chrome yellow
from the manufacturer, there shall be three (3) field coats of chrome yellow paint
applied by the contractor after installation.
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March 2019 Brunswick County Engineering Department Revision 1.13
f) Hydrant shall be dry bonnet type and be provided with a drain outlet for draining
when the valve is closed and shall be provided with washed stone per County
Standard Detail to ensure adequate drainage.
g) All fire hydrants installed on water mains 12-inch and smaller shall be installed as
shown on County Standard Detail W-1 using a swivel hydrant tee on the main and
DIP and/or MJ GradeLok restrained joint (Mega -A -Lug or equal) piping between
the hydrant gate valve and the hydrant. Mega -A -Lug is preferred in lieu of
rodding. Thrust blocks are required per detail.
h) All fire hydrants installed on water mains larger than 12-inch shall be installed
with a level invert tee on the main and DIP and/or MJ GradeLok restrained joint
(Mega -A -Lug or equal) piping between the hydrant gate valve and the hydrant.
Mega -A -Lug is preferred in lieu of rodding. Thrust blocks are required per detail.
i) Hydrants shall be installed plumb one -eight (1/8) inch per foot, and set so that the
pumper nozzle is eighteen (18) inches minimum above the final finished grade.
j) Contractor shall be allowed one (1) barrel extension as required to maintain
pumper nozzle at eighteen (18) inches above final finished grade and the fire
hydrant shall not be left too high such that the breakaway will not work properly.
k) Hydrants shall be Mueller, Clow, American Darling, or approved equal.
8.0 Materials and Requirements for Building Fire Sprinkler Systems
a) Backflow prevention devices are required on all fire lines and sprinkler systems to
prevent cross- contamination of the County's water transmission and distribution
system. Refer to the Brunswick County Public Utilities Department's Cross -
Connections and Backflow Protection Policy for additional information.
b) A lockable post indicator valve (PIV) is required at the right-of-way or easement
line on all fire lines to delineate ownership of the fire line between the County and
the property owner. The top of the PIV shall be thirty-six (36) inches above
finished grade. Refer to County Standard Details for fire lines.
c) Backflow prevention devices shall be installed at the right-of-way or easement
line immediately adjacent and downstream of the PIV. With County approval the
backflow prevention device may be installed inside a building's mechanical room
where the sprinkler riser is located.
e) Where a building utilizes a sprinkler system, or has a Fire Department Connection
(FDC), then the required level of backflow protection is a Reduced Pressure Zone
(RPZ) backflow preventer.
f) Fire hydrants shall not be installed on private fire lines.
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March 2019 Brunswick County Engineering Department Revision 1.13
9.0 Materials and Requirements for Water System Valves
a) General Information for all Valves
1) Valves shall be installed on all system branches from feeder mains, on
hydrant legs, at each end of horizontal directional drills per standard
detail, per a), b) and c) as follows, or as directed by county staff or the
engineer:
a) Install three (3) valves at crosses
b) Install two (2) valves at tees
c) Install one (1) valve on a fire hydrant leg
2) For distribution mains isolation valves are required at approximately every
one -hundred (100) feet per one (1) inch diameter of the installed main up
to a maximum distance of two thousand (2,000) feet between valves. For
example, for an eight (8) inch diameter main install a main line isolation
valve every eight hundred (800) feet. Place mail line isolation valves in
close proximity to fire hydrants. Also adjust main line isolation valve
placement to take into account subdivision entrances, driveways, fences,
street intersections, other underground utilities, etc, or as directed by
county staff. Restrained joint pipe is required on the first joint in each
direction from a main line valve as per county standard detail
3) For transmission mains - defined as twelve (12) inch and larger - install an
isolation valve approximately every two hundred (200) feet per one (1)
inch diameter of the installed main up to a maximum distance of five
thousand (5,000) feet between valves. Place main line isolation valves
near fire hydrants. Also adjust main line isolation valve placement to take
into account subdivision entrances, driveways, fences, street intersections,
other underground utilities, etc, or as directed by county staff. Restrained
joint pipe is required on the first joint in each direction from a main line
valve per county standard detail.
4) Place main line isolation valves on the downstream side of the fire hydrant
tee per the direction of water flow.
5) Valves shall be located per the approved plans, at the proper elevation, and
operable. Hard to operate or inoperable valves and fire hydrants are not
acceptable and shall be repaired or replaced prior to system hydrostatic
pressure testing.
6) All valves shall open left — no right hand open valves are allowed.
7) Valves shall be rodded to the cross or tee if within ten (10) feet of the
cross or tee.
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March 2019 Brunswick County Engineering Department Revision 1.13
8) All valves shall have a metal screw type valve box with lid marked
WATER and a concrete collar (in non -traffic areas) installed per the
County Standard Detail for valves and valve boxes. Masonry blocking
shall be used to support the valve box such that it does not rest on the
bonnet of valve — refer to county standard details. Valve lid shall be
painted blue.
9) Maximum depth of the valve stem nut shall be five (5) feet. If valve stem
nut is deeper than five (5) feet below grade then a valve operating nut
extension kit, manufactured by the same company that produced the valve,
must be installed by the utility contractor.
b) Gate Valves
1) All valves shall be in conformance with the latest revision of all reference
standards of AWWA C509 / 515: Resilient Seated Gate Valves for Water
Supply Service.
2) Four (4) inch through twelve (12) inch mains: use resilient wedge gate
valves or 1/4 turn stainless steel ball valves. No valves smaller than four
(4) inch diameter are allowed.
3) All valves shall open left (counter clock wise) — no right hand valves
allowed.
4) Valves shall have a two (2) inch metal operating nut with arrow indicating
direction of opening.
5) Valves shall be designed for a working pressure of not less than one
hundred fifty (150) psi unless specifically approved by county staff or the
Engineer.
6) Valves shall be equipped with a non -rising stem. Valves installed in
vaults or manholes shall be provided with hand wheel actuators.
7) All valves shall have a screw type valve box and a four (4) inch thick
concrete collar in non -traffic areas per county standard detail.
8) Resilient Seated Wedge Gate Valves:
a) Iron body, bronze mounted, double disc, parallel seat type, factory
tested to three hundred (300) psi, valve ends to be constructed for
use with mechanical joints or push on joints.
b) Bonnet and body flanges shall be fully machined to assure proper
sealing of the gasket.
c) Shall have O-Ring sealed stems with one O-Ring located below the
thrust collar and with two O-Rings located above the thrust collar.
The thrust collar between the two lower O-Rings shall be factory
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March 2019 Brunswick County Engineering Department Revision 1.13
filled with a lubricant to provide permanent lubrication of the thrust
collar area.
d) Provide integrally cast bronze or stainless -steel thrust collar.
e) An antifriction thrust washer shall be provided both above and
below the thrust collar for ease of operation.
f) Acceptable product: Mueller, M & H, American Flow Control,
Clow, or approved equal.
c) Butterfly Valves
1) Butterfly valves shall be installed on water mains sixteen (16) inch
diameter and larger.
2) Butterfly valves shall meet the requirement of AWWA C504, latest
revision.
3) Valves shall have mechanical joints.
4) Operating stem and nut shall be two (2) inch and open left only.
5) Resilient and elastomer seats are to be synthetic rubber (EPDM).
6) Shafts to be turned, ground and polished, constructed of 18-8 Type 304
stainless steel.
a) Shafts to be of one-piece design.
b) Attach disc to shaft with stainless steel tapered pins and locking
nuts.
7) Provide operators with not less than maximum operator torque, as
determined in accordance with Appendix A of AWWA C504, to operate
valves under actual line pressures and velocities:
a) Provide worm and gear, or traveling nut type, self-locking to
prevent the valve disc from creeping or fluttering when it is in any
intermediate position between open and closed.
b) Gear operators to be permanently lubricated, totally enclosed, with
adjustable stops for the open and closed position.
c) All exterior fasteners shall be minimum high strength alloy steel.
8) Epoxy coated inside and outside conforming to AWWA C550.
9) Rated for a one hundred fifty (150) psi working pressure.
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March 2019 Brunswick County Engineering Department Revision 1.13
10) Acceptable product: Mueller, American Darling, Pratt, or approved equal.
d) Tapping Valves — less than 30 inches
1) Tapping valves smaller than thirty (30) inches shall conform to the
following:
a) Resilient seated wedge type conforming to AWWA C509 / C515.
b) Epoxy coated inside and outside conforming to AWWA C550.
c) Both ends shall be flanged with tapping boss by mechanical joint
conforming to ANSI B16.1, Class 125 and ANSI / AWWA
C I I I / A21.11 respectively.
d) Rated for two hundred fifty (250) psi working pressure.
e) All exterior fasteners shall be minimum high strength alloy steel
f) Acceptable Product: Mueller T-2360 -16, AVK Series 25, or proved
equal.
e) Tapping valves(30) inches and larger
1) Bronze seat, double disk type, conforming to AWWA C500, or resilient
seated wedge conforming to AWWA C515.
2) Epoxy coated inside and out conforming to AWWA C550.
3) Equipped with four (4) inch by-pass valves.
4) Ends shall be flanged with tapping boss by mechanical joint conforming to
ANSI B16.1, Class 125 and ANSI/AWWA C111/A21.11 respectively.
5) Rated for (200) psi working pressure.
6) Acceptable product: Mueller t-2360 -16, AVK Series 25 or approved
equal.
10.0 Materials and Requirements for Valve Boxes and Concrete Collars
a) Install per county standard details at each water valve.
b) Cast iron or ductile iron, screw type, with flared base, length as required for the
buried valve, Valve Box Adaptor II, by Adaptor Inc., or approved equal.
c) The word "WATER" shall be cast in the cover.
d) The contractor shall spray paint the cover blue after installation.
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March 2019 Brunswick County Engineering Department Revision 1.13
e) Install precast concrete ring around valve box in unpaved non -traffic areas per
county standard detail.
11.0 Materials and Requirements for 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 in public rights -of -way shall be concrete, 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. Valve markers in utility
easements shall be fiberglass and extend sixty (60) inches above finished grade.
Refer to county standard details for additional information.
c) Valve markers are not required for fire hydrant leg isolation valves.
d) Valve markers shall be painted blue for water mains.
e) Concrete valve markers shall have a bronze, stamped, insert on top of marker per
county standard detail.
12.0 Materials and Requirements for Tapping Sleeves (services larger than 2 inch)
a) Tapping sleeves shall have outlet flange counter bored to accept a mating tapping
valve for true alignment of the tapping sleeve, tapping valve, and tapping
machine.
b) Sleeves shall be stainless steel, split type, with gasket and flanged outlet.
c) Sleeve fasteners shall be minimum high strength alloy steel.
d) Provide for a minimum working pressure of one hundred fifty (150) psi.
e) Provide (1/4) inch NPT test plug on the tapping sleeve.
f) Air test of tapping sleeve — minimum fifty (50) psig for five (5) minutes - shall be
witnessed by county staff prior to the contractor performing tapping
operations on county water mains. No taps are allowed without county staff
present.
g) Acceptable tapping sleeves are:
1) Romac, Ford, and Mueller for mains four (4) inches through twenty-four (24)
inches diameter.
2) Dresser, Cascade, and JCM for mains thirty (30) inches and larger.
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March 2019 Brunswick County Engineering Department Revision 1.13
13.0 Materials and Requirements for Curb Stops and Water Meter Boxes
a) All new residential subdivisions that have public sewer shall install a double
water meter box on each lot to accommodate an irrigation meter.
b) See Section 3.0 (o) of this specification for approved water meter boxes.
c) All single gang water meter boxes will have an in -line curb stop valve and an in -
line check valve per county standard detail.
d) All irrigation meters, and all non-residential water meters, must have an approved
backflow prevention device installed per county standard detail.
e) Brunswick County is standardizing on the Sensus AMR / AMI water meter. All
water meter boxes used in the service area of Brunswick County Public Utilities
must accommodate the Sensus AMR / AMI water meter.
14.0 Materials and Requirements for Locating Wire, Marking Tape, and Marker Balls
a) Tape shall be three (3) inches wide, blue in color, bearing continuous message
"CAUTION WATER LINE BURIED BELOW". Tape shall be made of plastic or
other permanent material, and shall be buried continuously above the water main
at a depth of eighteen (18) inches below finished grade.
b) All water 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 in valve boxes per County Standard Detail. In any event, 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 water main at minimum
ten (10) feet intervals.
c) The contractor shall be required to perform a signal strength test of the installed
tracer wire at the end of the project with county staff present. Refer to Brunswick
County standard details for tracer wire information.
d) Individual water services shall have tracer wire installed from the main to the
meter box.
e) In addition to the tracing wire, electronic marker balls shall be installed on the
water main in accordance with Brunswick County Technical Specification TS
035: Electronic Markers for Water and Sewer Pressure Mains.
15.0 Separation of Water Mains and Sewer Mains
a) Horizontal and Vertical Separation
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March 2019 Brunswick County Engineering Department Revision 1.13
1) Minimum horizontal separation between water mains and sanitary sewer
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 main provided that:
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 undistributed earth,
c) In either of the above cases, crown elevation of the sewer shall be
at least eighteen (18) inches below invert elevation of the water
line.
3) Sewers crossing 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 sewer 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 sewer must be laid above a water
main, then both the water main and sewer 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 sewer main at
water main / sewer main crossings. Fernco couplings are not permitted to
be used. Special structural support for the water and sewer mains may be
required.
16.0 Hydrostatic Testing
a) Conduct hydrostatic testing in accordance with AWWA C600 (DIP) or AWWA
C605 (PVC) as applicable. Conduct tests on each line or valved section of line.
Water mains shall be tested to one -hundred and fifty (150) percent of the pipe
working pressure, but in no case shall the hydrostatic test pressure be less than
(150) psig for a minimum of two (2) hours and shall be witnessed and certified by
county staff and / or the Engineer.
b) Slowly fill the main to expel air from the main through the air release valves, fire
hydrants, blow offs, or other appurtenances. If permanent air release valves are
not located at all high points, the contractor shall install corporation cocks at such
points so that air can be expelled as the line is filled with water. After all the air
has been expelled, the corporation cocks shall be closed, and the test pressure
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March 2019 Brunswick County Engineering Department Revision 1.13
applied. At the end of the pressure test, the corporation cocks shall be removed
and plugged.
c) Hydrostatic pressure testing shall not be made until seven (7) days after
installation of piping to be tested is backfilled, and a minimum forty-eight (48)
hour notice to county staff is required.
d) Directionally drilled pipe must be pressure tested after any manufacturer's
required pipe relaxation period, as applicable, to ascertain the successful
completion of the directional drill. All directionally drilled piping shall be tested
again with the complete system and witnessed by county staff and /or the
engineer.
e) A suitable test pump, furnished by the contractor, shall be connected to the line by
means of a tap in the line, or other suitable methods, and the proper test pressure
slowly applied to the line.
17.0 Water Main Flushing and Chlorination
a) Conduct disinfection in accordance with AWWA C651 and 15A NCAC 18C
.1003 before placing a newly installed water main in service:
1) Upon completion of construction thoroughly flush the water main to
remove all sediment, stone, and other foreign matter.
2) Hydrostatically pressures test the water main per Section (16) of this
specification.
3) The water main shall be disinfected by the addition and thorough
dispersion of a chlorine solution in concentrations sufficient to produce a
chlorine residual of at least fifty (50) milligrams per liter (or ppm) in the
water throughout the water main system.
4) All installed valves or other appurtenances shall be operated several times
while line is filled with chlorinating agent to ensure proper filling of the
entire system.
5) The chlorine solution shall remain in contact with the interior surfaces of
the piping system for a minimum period of twenty-four (24) hours.
6) At end of retention period flush the system with potable water. At least
(10) ppm of chlorine shall remain in the water at the extreme end of the
system.
7) If the initial disinfection procedure fails to produce satisfactory laboratory
results the system must be disinfected again as needed by the contractor
until satisfactory results are obtained.
8) Originals of the laboratory test results shall be provided to county staff.
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March 2019 Brunswick County Engineering Department Revision 1.13
b) Acceptance:
1) Provide separate samples for each sample location free of coliform
bacteria:
a) Contractor shall submit water samples to an approved laboratory
for testing.
b) Contact County Engineering or Public Utilities for assistance and
verification of sampling — a minimum forty-eight (48) hour notice
is required.
c) The sample results shall include the free chlorine residual at the
time the samples were collected.
d) All sample locations are to be given an identifying label.
e) The certified laboratory results shall indicate the absence of
coliform bacteria in the water samples.
2) At a minimum, sample locations shall be as required by NCDENR and the
following:
a) The tie-in location of new and existing water lines.
b) The end of all dead-end lines.
c) At intervals of no more than (1,200) feet for all new lines longer
than (1,200) feet in length.
c) Disposal of Chlorinated Water
1) The contractor is cautioned that the spent chlorine solution must be
disposed of in such a way as not to be detrimental to animal, plant, or fish
life.
18.0 Operation of Brunswick County Water System Valves and Fire Hydrants
a) No county valves or hydrants shall be operated by the contractor without prior
approval of county staff.
b) All hydrant and blow -off operations shall be done in a manner so that private
property is not impacted and there shall be no flooding of streets, driveways, or
roadways or any other traffic problems created.
c) The contractor shall contact county staff prior to performing system flushing or
blow -off operations with a minimum forty-eight (48) hour notice.
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September 2015 Brunswick County Engineering Department Revision 1.01
Technical Specification 019
STORM WATER DRAINAGE SYSTEM
1.0 General
a) This specification provides general guidance for the installation, repair, removal,
and reinstallation of storm water drainage systems and separation clearances
required to public utilities.
b) The contractor under this section is responsible for the removal and re-
installation and/or installation of all storm water drainage pipes, manholes,
headwalls, and other related structures where shown on the plans or as may be
disturbed during construction. Re -installation and/or installation will conform to
the requirements as specified in the North Carolina Department of Transportation
(NCDOT) "Standard Specifications for Roads and Structures" and all applicable
State and local rules concerning separation requirements to other utilities.
2.0 Reuse and Replacement of Drainage Pipe and Structures
a) The contractor shall be required to exercise extreme care in the removal and
handling of existing drainage pipe and structures to prevent damage. Existing
reusable drainage pipe removed shall be temporarily cleaned and properly stored
for re -installation upon completion of the contracted work.
b) The contractor is to replace all damaged drainage pipe with new re -
enforced pipe and shall dispose of damaged material.
c) Existing drainage pipe that is not suitable for reuse as determined by the Engineer
shall be replaced for the unit price found on the Bid Form. If the replacement
drainage pipe is not of the sizes or material found in the Bid Form, the Contractor
shall replace the pipe for price of material only. Contractor is to provide invoices
to satisfaction of the Engineer for the cost of material. Any drainage pipe
damaged as a result of Contractor's actions shall be replaced at Contractor's
expense.
d) All pipe shall be replaced as nearly as possible to the original grade and
alignment; however, the grade and alignment shall be uniform. The covers and
frames from displaced manholes and structures shall also be removed and stored
for use on replacement manholes and structures.
3.0 Replacement Drainage Pipe
a) Replacement drainage pipe for damaged sections shall be of size and grade of that
being replaced except that all replaced pipe shall be reinforced. Concrete pipe
shall conform to ASTM C-76, latest edition Class III with tongue and groove
joints and preformed mastic joint filler. Size requirements shall meet minimum
NCDOT standards in public rights -of -way.
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September 2015 Brunswick County Engineering Department Revision 1.01
4.0 Replacement Drainage Structures
a) Replaced manhole and inlet structures shall be precast concrete with preformed
holes or knockout panels unless otherwise approved.
5.0 Execution
a) Excavation, trenching, backfilling, and compaction shall be in compliance with
Brunswick County Technical Specification 013: Excavating, Grading, Trenching,
& Bacj�[illing.
Proper clearance between storm drainage pipe and public water, gravity sewer,
low pressure sewer, and transmission force mains shall be provided as indicated
in the Brunswick County Standard Details and per these minimum separations:
1) Minimum horizontal separation: 5 feet
2) Minimum vertical separation - without engineered support: 24 inches
3) Minimum vertical separation — with engineered support: as approved
by county staff
6.0 Drainage Pipe:
a) Replacement drainage pipe shall be new pipe that is free of defects. Store in an
acceptable manner until ready for installation. The pipe shall be installed from
the lowest point of the system, true to line and grade, with bell or groove and
facing upstream. The trench shall be maintained free of surface or ground water.
Great care shall be taken to obtain well aligned and tight pipe lines to assure good
flow and the exclusion of infiltration by ground water as much as possible.
Installation shall conform to the respective recommendations of the pipe
manufacturers or trade association.
b) Special care shall be taken to insure the pipes are well bedded on a solid
foundation, and no pipe shall be brought into position until the preceding length
has been thoroughly embedded and secured in place. Whenever a pipe requires
cutting to fit into the line or to bring it to the required location, the work shall be
done in a satisfactory manner, so as to leave a smooth end, and without extra
compensation. The pipe should be cleaned of all debris and soil as a result of
construction.
7.0 Drainage Structures:
a) Provide six (6) inches Class 1 gravel beneath structures to six (6) inches outside
of structure. Precast structures shall be set plumb, with pipes centered within
knockout panels. Provide opening of minimum size to accommodate pipe. Grout
pipe in place with non -shrink grout.
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September 2015 Brunswick County Engineering Department Revision 1.01
c) Inverts shall be pre -formed or formed with concrete or brick and concrete. All
lines entering structures shall be placed upon the concrete slab prior to beginning
any brick work. Any masonry work shall be brought up snugly around the lines
and a tight connection made to preclude any washout and cavities at the basin.
Provide minimum one (1) inch per foot slope to the flow line of the structure.
4.0 Technical Assistance
Contact the Brunswick County Stormwater Engineer as needed with any questions
concerning work on new or existing storm water drainage systems.
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April 2020 Brunswick County Engineering Department Revision 1.10
Technical Specification 021
LOW PRESSURE SEWER SYSTEMS AND GRINDER PUMPS
1.0 General
a) Gravity sewer systems are the preferred alternative for service to Brunswick
County residential and commercial customers. Some situations require the use of
alternative sewer systems such as vacuum systems or low-pressure sewer systems
utilizing grinder pumps.
b) It is the intent of this specification to provide technical guidance and information
concerning the design and installation of low-pressure sewer systems and grinder
pumps that are permitted and installed in Brunswick County's Public
Utilities' service area.
c) The design engineer shall be familiar with all NCDEQ / DWQ rules and
minimum design criteria for low pressure sewer systems and grinder pumps.
d) Refer to the design section -- Part E -- of this Design Manual for detailed design
guidance for low pressure sewer systems utilizing grinder pumps.
2.0 Low Pressure Sewer System Main and Service Lateral Materials
a) Low pressure sewer system mains shall be:
1) PVC pipe manufactured in accordance with ASTM D1785, ASTM D2241,
ASTM D2672, or AWWA C900 as follows:
• Pipes (2) — (4) inches diameter: minimum SDR-21
• Pipes larger than (4) inch diameter: minimum DR-18
• Pipes less than (2) inch diameter: SDR-21 and /or Schedule 40 PVC
• All low-pressure sewer main piping installed in NCDOT rights -of -way
shall be minimum DR-18
2) DIP manufactured in accordance with AWWA C 15 0 and 151 with pressure
Class 350 (only with express written approval from county Public Utilities
or Engineering Department)
3) HDPE pipe manufactured in accordance with ASTM D2239, D3035, or
AWWA C901.
4) Fusible PVC pipe manufactured in accordance with AWWA C900 with
ASTM cell classification 12454.
5) ABS pressure pipe is prohibited for low pressure sewer systems in
Brunswick County.
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April 2020 Brunswick County Engineering Department Revision 1.10
b) All low-pressure sewer pipes shall be marked with diameter, manufacturer's name
or trademark, pressure pipe type, grade and class, and shall be clearly visible for
inspection purposes.
c) All piping shall be installed in accordance with force main piping requirements
per Brunswick County Technical Specification TS 022: Waste Water Force
Mains and all NCDEQ / DWQ guidance document requirements.
d) The sewer mains shall be located, to the maximum extent possible, in areas where
damage is less likely and disruption to the neighborhood is minimized.
e) Low pressure sewer system mains installation and testing:
1) Install low pressure sewer pipe with a minimum cover depth of thirty-six
(36) inches, unless approved in writing by Brunswick County. Limit trench
widths to disturb as little undisturbed soil as possible. Trench backfill
beneath pavement should be compacted in nine -inch lifts.
2) Provide thrust restraint as required at all bends greater than (22.5) degrees
and all tees, wyes, stops, valves or changes in pipe size, or per written
approval of plans. Concrete thrust blocking and restrained joints are
acceptable forms of thrust restraint per county standard details.
3) Prior to commencement of pressure and leakage tests, all piping shall be
pigged or flushed at minimum of (2.5) feet per second velocity to result in
at least a 100% turnover of the water in the pipeline.
4) All piping shall be tested to (150) percent of the maximum operating
pressure — (100) psig minimum - for a period not less than (2) hours and
shall be witnessed by the design engineer and county staff.
5) For water main crossings refer to Brunswick County's Water and Sewer
Crossings Standard Details and comply with all DEQ / PWSS / DWQ /
NCAC rules on water and sewer main crossings.
f) Low pressure sewer service laterals shall be:
1) Two inch, AWWA C901, SDR- 9, polyethylene (PE), CTS, with a
minimum pressure rating of (200) psi.
2) Service taps and laterals shall consist of the tapping saddle and valve,
service line tubing, and the service box. No joints are permitted in the
service lateral from the main to the service box. The service box shall be
located in non -traffic areas. Driveways shall not be formed around service
boxes and the nearest distance from the service box to the driveway shall be
no less than eighteen (18) inches. Service boxes shall contain an isolation
plug valve and check valve with the isolation valve installed between the
main and the check valve to allow for check valve replacement. The lid of
the service box shall be marked SEWER and the lid painted green.
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April 2020 Brunswick County Engineering Department Revision 1.10
3) Refer to county low pressure system standard details for more information.
g) Push on joints shall be:
1) A single elastomeric gasket type with a pressure rating not less than the pipe
pressure rating and meeting the performance requirements of ASTM
D3139.
h) Restrained joints (RJ) shall be:
1) Required where indicated on the approved drawings.
2) DIP: the restrained joint system shall have a pressure rating equal to or
greater than that of the pipe on which it is used; push — on type joints shall
be a standard manufacturer's RJ system such as Snap -Lock (Griffin Pipe),
T R Flex (U.S. Pipe), Clow Super Lock, or written approved equal;
mechanical type joints shall be Meg -A -Lug (EBAA Iron), Cam -Lock,
Sigma Corporation, or written approved equal.
3) PVC: the restrained joint system shall have a pressure rating equal to or
greater than that of the pipe on which it is used; push — on type joints shall
be a standard manufacturer's RJ system such as Snap -Lock (Griffin Pipe),
T R Flex (U.S. Pipe), Clow Super Lock, or written approved equal;
mechanical type joints shall be Meg -A -Lug (EBAA Iron), Cam -Lock,
Sigma Corporation, or written approved equal.
4) All retainer gland type RJ shall be Meg -A -Lug (EBAA Iron), Cam -Lock,
Sigma Corporation, or written approved equal.
5) PVC and/or DIP to IPS pipe: deep bell, ductile iron, with knuckle restraint,
as manufactured by Sigma, HARCO, or written approved equal.
i) Vent pipe (if required for floodplain applications) shall be:
1) (2) inch, Schedule 80 PVC, vented through the side wall of the grinder tank,
and shall replace the standard top mounted mushroom vent, and the vent
pipe opening shall be screened and terminate a minimum of (2) feet above
the (100) year flood elevation or as directed by the Engineer.
j) Fittings shall be:
1) Fittings for PVC pipe three (3) inches and smaller: deep bell, ductile iron,
with knuckle restraint, as manufactured by Sigma, HARCO, or written
approved equal. Glue joint fittings are also acceptable for PVC pipe three
(3) inches and smaller.
2) Fittings for PVC pipe four (4) inches and larger: AWWA C 115, ductile iron
shall have a ceramic epoxy Protecto 401, Ceramapure PL90, lining, or
written approved equal, with the exterior coated with coal tar epoxy or other
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April 2020 Brunswick County Engineering Department Revision 1.10
bituminous coating to resist ground corrosion, as manufactured by Sigma,
HARCO, or written approved equal.
k) Air Release Facilities:
1) Air release facilities shall be similar to that specified in the Brunswick
County Technical Specification TS 022: Wastewater Force Mains. Air
release facilities shall be located at summits of all pressure sewer systems
and properly sized to prevent buildup of air or gases.
2) All air releases shall be automatic type. Manual air releases are not
permitted. Comply with all NCDEQ / DWQ / NCAC rules on locations of
air release valves.
3) Boxes and vaults for air release facilities, cleanouts and other appurtenances
shall be sized to permit easy removal of the facilities and permit operations
of the valves. "Sewer" shall be clearly marked on the box or vault cover.
per county standard details.
1) Locating wire and marker balls:
1) All low-pressure sewer main piping shall have a #12 AWG, high strength
copper clad steel conductor (HS-CCS) such as Copperhead Superflex, Pro
Trace High Flex, or written approved equal, with HDPE insulation, and
rated for direct burial. Listed and written 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 low-pressure sewer 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 installation with County staff present.
2) In addition to the tracing wire, electronic marker balls may be required on
the low-pressure sewer main. Refer to Brunswick County Technical
Specification TS 035: Electronic Markers for Water and Sewer Pressure
Mains for technical and installation requirements.
m) Low pressure connection to existing county sewer system:
1) All low-pressure connections to gravity sewer systems shall be made at a
manhole and enter at the existing invert to minimize turbulence of flow and
the release of hydrogen sulfide gas. If the low-pressure sewer main cannot
enter at the existing invert, then a restrained joint inside drop must be
constructed per county standard details.
2) Where low-pressure sewer mains connect to an existing gravity sewer
manhole, the manhole shall be polymer concrete or plastic polypropylene
to protect against hydrogen sulfide corrosion per Brunswick County
Technical Specification TS 020: Gravity Sanitary Sewer Systems — Section
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April 2020 Brunswick County Engineering Department Revision 1.10
5.0 (c) (11). If the existing manhole is concrete, either it shall be replaced
by a plastic polypropylene or precast polymer concrete manhole, or a
transitioning manhole made of polymer concrete or polypropylene shall be
added. If a transitioning manhole is installed, the distance between the
existing manhole and the transitioning manhole shall be no less than thirty-
six (36) inches unless otherwise approved in writing by county staff. Where
pressurized sewer mains connect to a gravity sewer manhole, the inside
diameter of the manhole shall be four (4) feet minimum.
3) For new low-pressure sewer mains connecting to an existing county gravity
system that requires the cut in of a new manhole:
The new sewer manhole shall be plastic polypropylene or precast polymer
concrete sections conforming to applicable standards outlined in Brunswick
County Technical Specification 020: Gravity Sanitary Sewer System
Section 5, and ASTM C478, as manufactured by Nyloplast ® ADS,
Armorock, Meyer Polycrete, or written approved equal. Riser section joints
shall be bell and spigot / ship -lap design seamed with butyl mastic and/or
rubber gaskets (ASTM C 990) so that on assembly the manhole base,
riser(s), and top sections make a continuous and uniform manhole structure.
A carbon filter must be provided on any manhole that has a low-pressure
sewer system connection.
n) In -line cleanouts and shutoff valves:
1) In -line cleanouts and shutoff valves shall be provided on low pressure sewer
main lines per county standard detail.
2) Spacing of cleanouts and shutoff valves shall not be less than six hundred
(600) feet of main line in high density areas and not less than one -thousand
(1,000) feet in low density areas.
3) Cleanouts shall be provided on the upstream side of all directional drills
with a vertical elevation change of ten (10) feet or greater.
4) In -line isolation valves are required of both sides of all directional drills per
county standard detail.
3.0 Packaged Grinder Pump Systems
a) Simplex residential packaged low-pressure sewer grinder pumps shall be:
1) Barnes OGP 2 HP, or written approved equal
b) Commercial and industrial duplex pump stations shall typically be permitted in the
owner's name and shall be operated and maintained by the owner. The design
engineer shall model the system and select a pump with the appropriate discharge
head conditions to operate satisfactorily under all operating conditions. Contact
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April 2020 Brunswick County Engineering Department Revision 1.10
county engineering staff for assistance with system modeling information and
sewer system pressure data.
Per the county Grinder Pump Maintenance Program, duplex pump stations may be
permitted in the county's name for operation and maintenance in limited
applications. In these limited applications, the engineer shall use the Barnes OGP
two (2) HP pump system, or written county approved equal, and shall verify its
adequacy for the design flow and discharge head conditions. A duplex grinder
pump station permitted in the county's name shall only serve one building. Any
proposed pump station that requires a larger pump horsepower will not be accepted
for county ownership and maintenance.
c) Packaged System Requirements
1) Wetwell:
Fiberglas, minimum storage of three hundred and sixty (360) gallons above
the PUMP OFF level, (4) inch diameter PVC inlet flange for Schedule 40
PVC sanitary line, pump discharge brass adapter socket, easily adaptable
to either (1.5) inch for residential, or (2) inch for commercial applications,
PVC or HDPE pipe materials, aluminum lid, mushroom vent on tank lid,
extended base, integral to the tank, for anchoring the anti -flotation concrete
ballast to tank, contractor shall provide concrete ballast as required, wet well
shall not be installed in the rear of the house or inside any fenced area,
removal of pumps and / or operation of discharge valve shall not require
personnel entry into the tank.
For floodplain applications: watertight lid, solid, no mushroom vent on lid,
(2) inch NPT female hub shall be provided in place of the mushroom vent
for installation by the contractor for side wall venting of the tank utilizing
Schedule 80 PVC vent piping.
2) Pump and motor:
Vertical rotor, motor driven, solids handling type, double O-ring seal at all
casting joints, pump castings cast iron, fully epoxy coated 8-10 mils
nominal dry thickness, rotor shall be stainless steel, through -hardened,
polished, maximum discharge pressure shall not exceed 150 psi, minimum
1.0 HP with 2.0 HP standard.
3) Electrical:
240 VAC, 60 Hz, single phase, 3450 RPM, pump cord length (15) feet
minimum, UL and CSA listed, quick connect cord for watertight attachment
to pump.
Note: Pumps will not operate on 208 VAC circuits and shall not be
connected to 208 VAC circuits. Buildings with 208 VAC electrical systems
shall require a 208 / 240 VAC transformer to provide the required 240 VAC.
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April 2020 Brunswick County Engineering Department Revision 1.10
4) Grinder:
Mounted directly below the pumping elements, direct -driven, fastened to
the pump motor shaft by means of a threaded connection only, cutter teeth
hardened to Rockwell 50-60 for abrasion resistance, solids must be fed in
an upward flow direction.
5) Integral Check Valve:
Factory installed, gravity operated, flapper type integral check valve built
into the stainless -steel discharge piping, must provide a full -ported
passageway when open, working parts constructed of 300 series stainless
steel and fabric reinforced synthetic elastomer to ensure corrosion
resistance.
6) Level Controls:
Starting controls to be located in the cast iron enclosure of the core unit —
plastic enclosure for starting controls is not acceptable, provide float
switch type level controls for PUMP OFF, PUMP ON, and HIGH LEVEL
ALARM in the wet well for simplex grinder pump stations, provide float
switch type level controls for PUMPS OFF, LEAD PUMP ON, LAG PUMP
ON, and HIGH LEVEL ALARM for duplex grinder pump stations, pump
on / off and high level alarm functions shall not be controlled by the same
switch.
Float switches shall consist of a mercury tube switch sealed within a
corrosion resistant polypropylene housing with a minimum (18) gauge, (2)
wires, SJOW / A jacketed cable. The cable shall be of sufficient length to
reach the connection junction box without splicing. The floats shall be
suspended from a stainless -steel support bracket mounted inside the wet
well such that any adjustment or replacement may be done without entering
the tank. Float level controls shall be UL / CSA listed and approved.
7) Power and Control Cables:
The power and control cables shall be a minimum of (25) feet long or as
needed to connect the wet well to the pump control panel. The power and
control cables shall not be spliced between the wet well and pump control
panel. The cables shall be UL / CSA listed and approved. The power and
control cables shall be installed in minimum (1.5) inch PVC conduit
(simplex pump) and minimum (2.0) inch PVC conduit (duplex pumps). The
conduit ends shall be sealed at each end with non -hardening duct sealant.
At the discretion of Brunswick County Public Utilities a direct burial rated
power and control cable assembly may be utilized. Any direct burial cable
assembly shall be UL / CSA listed and approved.
Connection of power and control cables at the wet well shall be a sealed
watertight connection. Power cable shall be sealed at the motor and
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April 2020 Brunswick County Engineering Department Revision 1.10
clamped in place with a rubber watertight seal bushing to seal the outer
jacket against leakage and to provide for strain relief. Cables shall
withstand a pull of 300-pound force.
8) Control Panel:
Automatic control panel, NEMA 4X rated, UV resistant, UL listed for wall
or pole mounting, hinged, lockable cover, high level alarm with red lexan
(polycarbonate) alarm light and alarm horn, must be mounted so the alarm
light is visible from the street, control panel must be within line -of -sight of
the wet well, a placard shall be affixed to the control panel with the
Brunswick County Public Utilities emergency phone number on the placard
for the owner's use and a 2nd copy of the placard placed inside the panel.
All internal wiring to be neat and color coded. A schematic wiring diagram
shall be permanently affixed to the inside of the panel door. An
installation and service manual for each control panel shall be provided
Brunswick County Public Utilities.
All conduits shall enter the bottom of the control panel and utilize a
watertight hub — Myers or written approved equal.
9) Local Disconnects:
Simplex Pump local disconnect: Single family residential grinder pumps
are required to have the pump alarm and control circuit powered
independently of the pump power circuit. Therefore, two local disconnects
are required adjacent to the grinder pump control panel:
Pump Alarm & Control Circuit: 120 VAC, single phase, (15) amperes,
single pole disconnect
Pump Power Circuit: 240 VAC, single phase, (30) amperes, double
pole disconnect
Disconnects shall be UL listed and rated for outdoor applications and
installed per all NEC and Authority Having Jurisdiction (AHJ)
requirements.
The disconnects are required on the homeowner's branch circuit supplying
the grinder pump panel and shall be installed before county staff will
energize the grinder pump system.
Duplex Pump local disconnect: 240 VAC, double pole, single phase, (60)
ampere rated electrical disconnect is required adjacent to the grinder pump
control panel. Disconnect to be UL listed and rated for outdoor applications
and installed per all NEC and Authority Having Jurisdiction (AHJ)
requirements.
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April 2020 Brunswick County Engineering Department Revision 1.10
This disconnect is required on the branch circuit supplying the duplex
grinder pump panel and shall be installed before county staff will energize
the grinder pump system.
10) Warranty:
Minimum (2) year parts and labor warranty on the complete station and
accessories, including, but not limited to, the control panel, pump and motor
assembly, and integral check valve.
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April 2020 Brunswick County Engineering Department Revision 1.08
Technical Specification 022
WASTEWATER FORCE MAINS
1.0 General
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
DEQ/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 C of this Brunswick County Engineering Design
Manual, Technical Specification and Standard Details for Water and Sewer
S y stems 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 upstream direction
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
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)
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April 2020 Brunswick County Engineering Department Revision 1.08
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) 4 — 60 inches: Polyvinyl Chloride (PVC), AWWA C900, DR-18 minimum
2) 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)
3) 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
4) High Density Polyethylene, (HDPE), PE 4710, ASTM D2239, minimum
DR-9
5) Polyvinyl Chloride (PVC), Schedules 40 and 80, ASTM D 1785.
b) Minimum force main piping size: 4 inch (unless written approved low-pressure
sewer mains).
c) DIP shall be lined internally with Protecto 401, Ceramapure PL90, ceramic epoxy
lining or written approved equal for internal corrosion resistance.
d) DIP shall have an exterior bituminous asphaltic coating for corrosion resistivity.
e) DIP pressure class per pipe size shall be:
Pipe Size inches
Pressure Class(psi)
4 - 12
350
14 - 20
250
24 - 64
200
f) 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
have a factory applied green strip. All pipe used for force main construction shall
be labeled or otherwise identified as conveying wastewater per NCDEQ
"Minimum Design Criteria for the Fast Track Permitting of Pumn Stations and
Force Mains"
g) HDPE pipe shall conform to ASTM D3035 and ASTM F714 with PE 4710
material
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April 2020 Brunswick County Engineering Department Revision 1.08
h) HDPE force mains shall be joined by the thermal butt fusion method in
accordance with ASTM A2657 and the manufacturer's installation
recommendations.
i) Fusible PVC force mains shall be joined by the thermal butt fusion method in
accordance with ASTM D638 and the manufacturer's installation
recommendations.
j) All piping shall be clearly marked with Manufacturer, Type, Pressure Class
and/or DR number, and date of production.
k) 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.
1) 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 have restrained joints per county
standard details and this technical specification
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) PolMinyl 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.
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April 2020 Brunswick County Engineering Department Revision 1.08
Mechanical joint restraints shall conform to ANSI/AWWA A21.11/
CI I I 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 written 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/CI I I
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 written 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.
h) Ductile Iron Pipe (DIP)
1) Must have written permission of county staff to use DIP.
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 written 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 ANSI/AWWA A21.11/C111 and
ANSI/AWWA A21.53/C153, latest revision.
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April 2020 Brunswick County Engineering Department Revision 1.08
The restrained joint system shall be a manufacturer's standard restrained
joint system manufactured by EBAA Iron, Inc., Smith -Blair, Inc., JCM,
Inc., or written 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
ANSI/AWWA A21.11/CI I I and ANSFAWWA 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 written 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.
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 CI11. 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 CI 11.
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 CI11/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, Ceramapure PL90, or equal and coated on the
exterior with a bituminous asphaltic coating for corrosion resistivity.
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April 2020 Brunswick County Engineering Department Revision 1.08
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 O-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 written
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 for above ground connection and mechanical joints for
underground connections, ports shall be 100% port, with a minimum one -hundred
fifty (150) psi pressure rating, cast iron body, plugs shall be cast iron or Ductile
Iron, of one piece construction, resilient faced, with all exposed nuts, bolts,
springs, washers, etc, a minimum Type 316 stainless steel. Plug valves shall be
DeZurik, Kennedy, Milliken, Pratt or written 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.
d) To the maximum extent possible all plug valves shall be located outside of roads,
streets, driveways, and other paved areas.
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April 2020 Brunswick County Engineering Department Revision 1.08
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.
d) Concrete valve markers shall have a bronze, stamped, insert on top of marker per
county standard detail.
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April 2020 Brunswick County Engineering Department Revision 1.08
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 written 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 markup 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 G1asMasters polymer
concrete box, or written 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.
10) Valves shall be mounted on McDonald 3800 series stainless steel saddle
with Type 304 stainless steel or better valve and nipples.
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April 2020 Brunswick County Engineering Department Revision 1.08
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 written
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.
c) 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: 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:
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April 2020 Brunswick County Engineering Department Revision 1.08
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) When installing a force main above or below a water main or storm drain,
all minimum separations and material requirements must be met, as
defined by 15 NCAC 02T .0305 and 15A NCAC 18C .0906 (b) and (c);
outlined below:
a) Sewer mains shall be laid at least ten (10) feet horizontally from
existing or proposed water mains, unless local conditions or barriers
prevent a 10-foot separation, in which case;
b) The sewer main shall be DR-18 or better and shall be laid in a
separate trench, with eighteen (18) inch minimum separation
between the invert of the water main and the crown of the sewer
main; or the water main shall be laid in the same trench as the
sewer, with the water main located at one side on a bench of
undisturbed earth and with the elevation of the bottom of the water
main at least eighteen (18) inches above the top of the sewer.
c) When a pressurized sewer main crosses a water main, the sewer
main will be built to water main rules (15A NCAC 18C .0906);
where one full length of water pipe shall be located so that both
joints will be as far from the sewer as possible. If separation
requirements cannot be achieved, the sewer main shall be
constructed in a manner concurrent with Brunswick County
standard detail S-15.
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.
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April 2020 Brunswick County Engineering Department Revision 1.08
16.0 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.
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
polymer concrete or plastic polypropylene to protect against hydrogen sulfide
corrosion per Brunswick County Technical Specification TS 020: Gravi
Sanitary Sewer Systems — Section 5.0 (c) (11). If the existing manhole is
concrete, it will be required to either replace the existing concrete manhole with a
plastic polypropylene or precast polymer concrete manhole or add an additional
polymer concrete or polypropylene transitioning manhole. If a transitioning
manhole is installed, the distance between the existing manhole and the
transitioning manhole shall be no less than thirty-six (36) inches, unless approved
in writing by Brunswick County.
h) New gravity manholes, and transitioning manholes installed to allow a new force
main to connect to an existing sewer system, shall be plastic polypropylene or
precast polymer concrete sections conforming to ASTM C478 as manufactured by
Nyloplast ® ADS, Armorock, Meyer Polycrete, or written 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.
i) 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.
17.0 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.
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April 2020 Brunswick County Engineering Department Revision 1.08
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 with the required valves in place at each end of the HDD.
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June 2017 Brunswick County Engineering Department Revision 1.02
Technical Specification 025
LANDSCAPING
1.0 General
a) The contractor shall be responsible for providing all labor, materials, tools,
equipment, topsoil, fertilizer, lime, mulch, seed, or sod if necessary for restoration
and stabilization of areas disturbed under this contract.
b) All areas disturbed, whether in street rights -of -way, permanent easements or
temporary construction easements, shall be restored by the contractor upon
completion of backfilling. The contractor may be required to restore original
structures, decorative vegetation, grass seed, sod, and shrubbery removed to as
near the original condition as possible and to the approval of the Engineer and / or
Brunswick County. County staff can provide the contractor with the terms and
conditions of any county negotiated easement with regards to final restoration
conditions.
2.0 Protection Measures
a) The utility contractor shall make every effort to avoid damage to existing trees,
shrubs, flower beds and structural improvements. Such measures shall include,
but not be limited to the following:
1) Remove and replant small trees and shrubs.
2) Remove and reinstall fences, mailboxes, planters, trash racks and similar
improvements.
3) Tie back ornamental branches that interfere with construction to avoid
damage.
4) Trim damaged branches of vegetation to improve appearance.
5) Treat tree trunks damaged by construction or removed with an asphalt tree
dressing compound.
6) Use small rubber tired back hoes, trench boxes and special equipment in
areas restricted in work space.
7) Stripping areas of grasses normally established by sodding or sprigging
such as Zoysia, hybrid Bermudagrass, St. Augustine, Bahia, Carpetgrass,
etc., maintaining with proper moisture content and re -sodding original
lawn materials. The contractor shall re -sod at their cost if stripping of
grasses and /or sod per this section is disregarded.
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June 2017 Brunswick County Engineering Department Revision 1.02
3.0 Submittals
a) The utility contractor shall submit the names and composition of the fertilizers,
sod and seed mixtures and mulch type to the Engineer prior to initiation of
restoration activities for review and approval.
4.0 Lawn and Roadway Shoulder Replacement
a) The utility contractor shall re-establish turf in all areas where grass existed prior
to construction, and is disturbed or damaged by construction activities without
additional compensation.
1) Lawns:
a) The type of turf shall be equal to that existing prior to construction
in disturbed areas on private property. The contractor shall be
required to either seed or sod disturbed areas to provide a grass
stand equivalent to that existing prior to the disturbing activities.
2) Roadway right-of-way / easements / public property
a) The type of turf shall be equal to that existing prior to construction
in disturbed areas which are located inside of the right-of-way. At
a minimum, the contractor shall be required to provide a
satisfactory stand of perennial grass with a root system sufficiently
developed to survive dry periods and winter weather, capable of
re-establishment in the spring. In well maintained areas within the
roadway right-of-way, easements, and public property the
Engineer may require sod to be installed. The Engineer may direct
areas with irrigation systems to be sodded.
5.0 Materials
a) The contractor shall use the following materials on the project unless otherwise
approved by the Engineer and /or any special requirement of NCDOT for
restoration work within NCDOT rights -of -way:
1) Topsoil:
a) Where topsoil has been previously hauled in, it shall be restored by
removal, stockpiling and replacing, or by hauling in new topsoil.
2) Seed:
a) The seed shall have 97% purity and 90% germination guarantee.
All seed must meet the requirements of the North Carolina
Department of Agriculture. Bags shall be labeled to describe the
composition, purity, germination, and the presence of restrictive or
prohibited agents. Damp or moldy seed will be rejected.
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June 2017 Brunswick County Engineering Department Revision 1.02
3) Turfgrass sod shall be of good quality, free of weeds, disease and of good
color and density. Turfgrass sod composition shall match the varieties
replaced and shall be supplied by a reputable sod producer.
4) Fertilizers:
a) Fertilizer shall be 10-10-10 or equivalent of uniform, free -flowing
granules. The fertilizer shall be delivered to the site in the original
containers labeled with contents and producer's name. The
Engineer may require additional or a different fertilizer based on
seed performance or soil test.
5) Lime:
a) The dolomitic lime shall consist of ground agriculture limestone
containing not less than 85% of combined calcium and magnesium
carbonates with 60% passing a #60 mesh sieve and 95% passing a
# 10 mesh sieve.
6) Mulch:
a) Mulch shall consist of dry, unchopped, unweathered small grain
straw or hay free of seeds of competing plants. Apply 1 to 2
tons/acre on all seeded areas. All slopes with straw mulch
exceeding 3:1 slope shall have an asphalt tack applied at the rate of
225 gallons/acre. Straw mulch that is matted or lumpy shall be
loosened and separated before being used. The utility contractor
may use alternate mulches upon approval of the Engineer.
7) Asphalt Binding Material:
a) The asphalt binding material for anchoring mulch shall consist of
emulsified asphalt per North Carolina Department of
Transportation specifications.
8) Water:
a) Water shall be potable, and free of contents which could retard
grass growth.
6.0 Preparation of Disturbed Areas
a) Uncultivated Areas:
1) All uncultivated areas that are disturbed by the pipe laying operation shall
be restored to good condition with similar materials as original.
Restoration includes, but is not limited to, asphalt, paint stripes, concrete,
curbs, culvert pipe, mailboxes and signs. Areas shall be cleaned and
surplus materials removed.
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June 2017 Brunswick County Engineering Department Revision 1.02
2) Natural areas shall be graded to final grade, limed, fertilized, seeded and
mulched as required and as described in Part 6.0 Cultivated Areas, except
no topsoil application is required. Wetland areas are to be restored with
original vegetation or with plants of same species as specified by the
regulating authority. Topsoil will not be required on road shoulder
adjacent to uncultivated areas except in those areas where suitable erosion
ground cover is unattainable through seeding.
b) Cultivated Areas:
1) Existing seeded and/or planted areas disturbed by construction shall be
dressed with topsoil, limed, fertilized, seeded and mulched. Furnish and
apply soil conditioners and seed as specified.
2) Excess stone from construction activities left on private property or rights -
of -way shall be removed by the Contractor, at his expense, to prevent
damage to maintenance equipment and operations.
c) Topsoil:
1) After approval of rough grading, the Contractor shall place the topsoil on
all cultivated areas damaged by his operations, except for road shoulders
adjacent to undeveloped and uncultivated areas. Topsoil shall be at least
four (4) inches deep. All topsoil from stripping which is not used at the
job site shall be removed from the site.
d) Soil Conditioners:
1) Lime and fertilizer shall be spread and thoroughly worked into the topsoil
at the rates of 3,000 lbs/acre and 1,000 lbs/acre, respectively. Then the
soil shall be raked until the surface is finely pulverized and smooth and
shall be compacted with rollers, weighing not over 100 pounds per linear
foot of tread, to an even surface conforming to the prescribed lines and
grades.
e) Seeding / sodding:
1) Seeding / sodding shall be done when weather conditions are approved as
suitable. If there is a delay, during which weeds grow or soil is washed
out, the Contractor shall remove the weeds or replace the soil before
seeding / sodding, without additional compensation. Immediately before
seeding / sodding is started, the soil shall be lightly raked.
2) Seed shall be sown during the following dates at the following pound per
acre rates. On a calm day and preferably by machine, but if by hand, only
by experienced workmen. Hydroseeding may be permitted.
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June 2017 Brunswick County Engineering Department Revision 1.02
a) For soils with good moisture retention from February 15 to April
30 or September 1 to October 31. Seed with 80 lbs tall Fescue, 50
lbs unhulled Common Bermuda Grass, 40 lbs Kobe Lespedeza.
b) For soils with poor moisture retention from April 1 - July 15, seed
with 50 lbs unhulled Common Bermuda Grass, 5 lbs Centipede
Grass and 10 lbs German Millet.
c) Temporarily seeding all other times (to be reseeded at the first
available date listed in 1 or 2 above), 120 lbs rye (grain), 50 lbs
Kobe Lespedeza.
3) Seed shall be raked lightly into the soil to a depth of 1/4 inch and rolled
with a roller weighing not more than 100 pounds per linear foot of tread.
4) Wherever poor germination occurs in areas larger than three (3) square
feet, the Contractor shall reseed, roll, and water as necessary to obtain
proper germination. The Contractor shall water, weed, cut and otherwise
maintain and protect seeded areas as necessary to produce a dense, healthy
growth of perennial lawn grass.
f) Mulch:
1) All seeded areas shall be mulched unless otherwise indicated in the
Special Provisions or directed by the Engineer.
2) Grain straw may be used as mulch at any time of the year. If permission
to use material other than grain straw is requested by the Contractor and
the use of such material is approved by the Engineer, the seasonal
limitations, the methods and rates of application, the type of binding
material, or other conditions governing the use of such material will be
established by the Engineer at the time of approval.
3) Mulch shall be applied within 36 hours after the completion of seeding
unless otherwise permitted by the Engineer. Care shall be exercised to
prevent displacement of soil or seed, or other damage to the seeded area
during the mulching operations.
4) Mulch shall be uniformly spread by hand or by approved mechanical
spreaders or blowers which will provide an acceptable application. An
acceptable application will be that which will allow some sunlight to
penetrate and air to circulate, but also partially shade the ground, reduce
erosion, and conserve soil moisture. Mulch rate shall be 2 tons per acre.
When there are seasonal limitations on seeding or when other weather or
erosion conditions make it desirable to mulch in advance of seeding, the
Engineer may direct that mulch be applied after the application and
incorporation of limestone into the seedbed, and the fertilizer and seed
then applied later through the mulch in proper season or under more
favorable weather conditions.
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June 2017 Brunswick County Engineering Department Revision 1.02
5) Mulch shall be held in place by applying a sufficient amount of asphalt or
other approved binding material to assure that the mulch is properly held
in place. The rate and method of application of binding material shall
meet the approval of the Engineer. Where the binding material is not
applied directly with the mulch, it shall be applied immediately following
the mulch application. During the application of asphalt binding material,
or other approved binding materials which may cause damage, adequate
precautions shall be taken to prevent damage to traffic, structures,
guardrails, traffic control devices, or any other appurtenances. The
contractor shall either provide adequate covering or change methods of
application as required to avoid such damage. When such damage occurs,
the Contractor shall repair it, including any cleaning that may be
necessary.
6) The Contractor shall take sufficient precautions to prevent mulch from
entering drainage structures through displacement by wind, water, or other
causes and shall promptly remove any blockage to drainage facilities
which may occur.
7.0 Inspection and Acceptance
a) The Engineer and Owner will be furnished with duplicate copies of invoices for
all sod, seed, fertilizer and lime used on the project.
b) At the beginning of the next planting season after that in which the permanent
grass crop is sown, the seeded areas will be inspected. Any section not showing
dense, vigorous growth at that time shall be promptly reseeded by the Contractor
at his own expense.
c) Restoration shall be accepted when a healthy growth of the vegetation is achieved
and maintained to a height of 4" with 85% coverage; provided that no bare spots
larger than 10 square feet exist.
d) No separate payment will be made for Landscaping. All costs incurred by the
contractor for this work shall be included in the unit or lump sum price for the
item of work to which it pertains.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 026
CONCRETE REINFORCEMENT
1.0 General
a) This specification gives general guidance and requirements for the structural
reinforcement of poured in place concrete. Additional requirements may be
required by the Engineer for the project and will be shown on the plans approved
by the Engineer and Brunswick County.
2.0 Reference Standards and Specifications
a) The latest editions of the reference standards listed below form a part of this
specification and are applicable to this project.
b) American Society for Testing and Materials:
1) ASTM A- 615:
2) ASTM A -185:
c) American Concrete Institute:
Deformed and Plain Billet -Steel Bars for Concrete
Reinforcement
Specification for Welded Steel Wire Fabric for
Concrete Reinforcement
1) ACI315: Manual of Standard Practice for Detailing Reinforced
Concrete Structures
2) ACI 318: Building Code Requirements for Reinforced Concrete
d) Concrete Reinforcing Steel Institute
1) CRSI 163: Recommended Practice for Placing Reinforcing Bars
2) CRSI165: Recommended Practice for Placing Bar Supports,
Specifications, and Nomenclature
e) Brunswick County Technical Specification TS 027: Cast -in -Place Concrete
3.0 Submittals
a) The general contractor, or utility contractor, shall submit the following items to
the Engineer for review and approval prior to beginning work:
1) Manufacturer's certificates giving the properties of steel proposed for use.
List the manufacturer's test number and heat number, chemical analysis;
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September 2012 Brunswick County Engineering Department Revision 1.00
yield point, tensile strength and percent elongation. Also identify on the
certificates the proposed location of the steel in the work.
2) Submit the bill of materials along with the shop drawings for review.
d) Shop Drawings:
1) Submit shop drawings for proposed reinforcement materials. Show
reinforcement fabrication, bar placement location, splices, and spacing and
bar designation, bar type, length size, bending number of bars, and other
pertinent information, including dimensions. Information must
correspond directly to data listed on the bill of material.
2) Provide sufficient detail to permit placement of reinforcement without use
of design drawings. Reproduction of design drawings for use as shop
drawings will not be allowed. Begin fabrication of reinforcing steel after
shop drawings have been reviewed and approved by the Engineer.
3) Refer to ACI reference for detailing, location, placing, splicing, etc. of
reinforcing steel to be shown on shop drawings.
4.0 Handling and Storage
a) Store steel reinforcement above the ground on platforms, skids or other supports.
Protect reinforcing, as far as practicable, from mechanical injury, surface
deterioration and rusting caused by exposure to the weather.
5.0 Materials
a) Deformed Bars: Use deformed bars conforming to ASTM A- 615
b) Marking: Clearly mark all bars with waterproof tags showing the number of bars,
size, mark, length, and yield strength. Mark steel with the same designation as the
member in which it occurs. Key marks to the concrete placement number as
designated in the concrete placement sequence shown on the drawings.
c) Welded Wire Fabric: Use welded wire fabric per ASTM A- 185
d) Tie Wire: Use 18-gage annealed steel for tie wire.
6.0 Accessories
a) Submit all accessory items, such as expansion joint fillers, joint sealing
compounds, riser bars, bonding agents, crack fillers, primers, and other accessory
items as a shop submittal to the Engineer for review and approval prior to
beginning work on the project.
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September 2012 Brunswick County Engineering Department Revision 1.00
7.0 Notification
a) Notify the Engineer at least twenty — four (24) hours before concrete placement so
that reinforcement may be inspected and errors corrected without delaying the
work.
b) All reinforcement shall have a minimum two (2) inch clearance from all forms
unless designed to protrude into a subsequent, adjacent, concrete pour.
8.0 Payment
a) Include all work for concrete reinforcement in the unit cost for cast -in -place
concrete. Separate payment will not be made for this item.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 028
GENERAL ELECTRICAL INFORMATION
1.0 General
a) The intent of this specification is to provide technical information and guidance
for the furnishing of all labor, equipment, supplies, and materials, and the
performing of all operations necessary to complete the installation of an electrical
system as indicated on the approved plans or Contract Documents for County
projects.
This work includes, but is not limited to, trenches, wiring, conduit, fittings, outlet
boxes, junction boxes, pull boxes, switches, receptacles, pump stations, panel
boards, lighting fixtures, lamps, relays, timers, alarms, control centers and surge
arrestors.
b) All electrical work shall be performed by a North Carolina licensed electrical
contractor. The electrical contractor may function as a prime contractor or as a
sub -contractor to a North Carolina licensed general contractor.
c) The electrical contractor shall assume complete responsibility for any portion of
the work provided by his subcontractors.
d) All electrical work shall be in conformance with the National Electrical Code
(NEC) and other applicable standards and local rules and codes of the Authority
having Jurisdiction (AHJ).
e) The electrical contractor shall obtain all required permits from the Authority
having Jurisdiction (AHJ) prior to beginning any of the work.
f) Related Brunswick County Technical Specifications are:
1) TS 029: Electrical Services
2) TS 030: Grounding and Bonding
3) TS 031: Surge Protection
4) TS 032: Standby Emergency Power Generator for Sewer Pump Stations
5) TS 033: Automatic Transfer Switch
6) TS 034: SCADA Control System for Sewer Pump Stations
7) Brunswick County Standard Details
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September 2012 Brunswick County Engineering Department Revision 1.00
g) It is the intent and meaning of the project drawings and specifications to require
completely finished work that has been tested and is ready for operation. The
electrical contractor shall take this meaning into consideration and include in his
bid minor pieces of material and labor to allow for contingencies and thus provide
a finished product without numerous requests for minor extra labor and material.
h) All permits for the electrical work shall be obtained and paid for by either the
general contractor or the electrical contractor. All inspections, tests, or additional
fees required for the completion of the work shall also be paid for by either the
general or electrical contractor. Determination of who pays the required fees shall
be a coordination issue between the general and electrical contractor.
i) Work shall be executed as required by the approved drawings and accompanying
technical specifications and shall be done in a neat, workmanlike manner by
skilled mechanics. The electrical contractor is responsible for the finished work
presenting a neat, trim, finished appearance, and capable of passing the final
electrical inspection by the Authority Having Jurisdiction (AHJ).
2.0 Reference Standards
a) National Electrical Code (NEC)
b) National Electrical Manufacturing Association (NEMA)
c) American National Standards Institute (ANSI)
d) National Fire Protection Association (NFPA)
e) Insulated Power Cable Engineers Association (IPCA)
f) Institute of Electrical & Electronic Engineers (IEEE)
g) Underwriter's Laboratories (UL)
h) Electrical Testing Laboratory (ETL)
i) Canadian Standards Association (CSA)
3.0 Submittals
a) The electrical contractor shall submit shop drawings and other required materials
to the Engineer for review and approval prior to beginning work. Such list shall
include the manufacturer, trade name, type, model, series, and other pertinent
information for the major items of electrical equipment proposed to be used by
the electrical contractor.
b) The electrical contractor shall submit a minimum of four (4) sets of all shop
drawings and other materials to the Engineer per this Submittal Section. One set
will be returned to the electrical contractor by the Engineer after review and
approval.
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September 2012 Brunswick County Engineering Department Revision 1.00
c) The electrical contractor shall analyze all shop drawings and other materials
before submittal and ensure that they meet all requirements of the approved plans
and Contract Drawings and Specifications. The electrical contractor shall place
his "Contractor Certification" in the form of an approval stamp on the submittals
prior to delivering the submittal package to the Engineer for review and approval.
d) Certain makes and models of electrical equipment are specified. The electrical
contractor shall submit his proposal for the specified materials and equipment, or
their equivalent, provided the words "or equal" or "or approved equal" follow the
named manufacturers. If the "or equal" or "or approved equal" phrases do not
appear on the plans, Contract Drawings, or Specifications, then the specified
manufacturers shall be furnished without substitution. Equivalent or approved
equal is interpreted to mean an item of material or equipment, similar to that
named and which is suitable for the same use, electrical characteristics, and
capable of performing the same functions as that named. The Engineer shall be
the judge of equipment equality and his decision is final.
e) Where no specific material or equipment type is referenced any first class product
of a reputable manufacturer may be used provided it conforms to the requirements
of the approved plans, Contract Documents, and Specifications. These materials
shall be third party listed as UL, ETL, CSA, etc.
f) If the shop submittals deviate from the approved plans, Contract Documents, or
Specifications, the electrical contractor shall advise the Engineer, in writing, of
the deviations and the reason for the deviation.
g) Approval by the Engineer of the submittals by the electrical contractor shall not
relieve the electrical contractor from the responsibility of furnishing same of
proper dimensions, size, quantity, quality, and all performance characteristics to
efficiently perform the requirements and intent of the approved plans, Contract
Documents, and Specifications.
h) Physical sizes of equipment used in the design layout are those of reputable
electrical equipment manufacturers. The electrical contractor is responsible for
providing equipment that will fit the space provided as shown on the approved
plans, Contract Documents, and Specifications. If the electrical contractor uses an
"approved equal" as reviewed and approved by the Engineer, any resulting
conflicts with space clearances, NEC required clearances, or local codes shall be
the responsibility of the electrical contractor to correct at his expense. The
electrical contractor is responsible for providing all code required electrical
clearances.
i) The approved drawings, Contract Documents, and Specifications indicate the
extent and general arrangement of the various systems. If any departures from
these drawings are deemed necessary by the electrical contractor, detailed
drawings and descriptions of these departures and a statement of the reasons
therefore shall be submitted to the Engineer for approval as soon as practicable.
No departures from the arrangements shown on the drawings shall be made
without prior written approval of the Engineer or County staff.
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September 2012 Brunswick County Engineering Department Revision 1.00
4.0 Drawings and Specifications
a) The electrical drawings and specifications are complementary each to the other,
and what may be called for by one shall be binding as if called for by both. The
drawings are diagrammatic and indicate generally the location of outlets,
switches, devices, equipment wiring, etc., and show the general arrangement of
conduits, raceways, fixtures, and equipment. Drawings shall be followed as
closely as actual building and / or pump station construction allow, and the work
of other trades will permit; however, all work shall suit the finished surroundings.
b) For a Brunswick County sewer pump stations the Class 1, Division 1 and Class 1,
Division 2 hazardous location clearances shall be maintained — no exceptions. If
the electrical contractor cannot install the equipment per the approved plans and
County pump station Standard Details, and maintain the Class 1 Division 1 and /
or Class 2 Division 2 clearances, he is to contact the Engineer immediately to
request a resolution from the Engineer and / or County staff.
c) It is understood that where the words "furnish", "provide", and / or "install" are
used, it is intended that the electrical contractor shall purchase and install
completely all material necessary and required for a particular item, system,
equipment, etc.
d) The electrical work shall conform to the requirements shown on the approved
plans, Contract Documents, Specifications, and Standard Details. General and
Structural drawings shall take precedence over Electrical Drawings. Because of
the small scale of the electrical drawings, it is not practical to indicate offsets,
bends, fittings, and accessories that may be required. The electrical contractor
shall investigate the project site and shall arrange his work accordingly, providing
such fittings and accessories as may be required to meet code and provide the
final finished and functional product, without additional cost to the Owner and as
directed by the Engineer.
5.0 Electrical Equipment and Materials
a) All equipment and materials provided shall be new and unused, and shall bear the
manufacturer's name, trade name, and UL label (or other listing label) as
applicable.
b) Equipment and materials shall be delivered to the job site and protected against
the elements until installed. All items subject to moisture damage shall be stored
in dry, heated and / or cooled, conditioned spaces. Rusty and / or corroded
equipment and materials shall not be used.
c) It shall be the electrical contractor's responsibility to ensure that items to be
furnished fit in the space available.
d) Manufacturer's directions shall be followed completely in the delivery, storage,
protection, and installation of all electrical equipment and materials.
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September 2012 Brunswick County Engineering Department Revision 1.00
e) Anchor bolts, sleeves, inserts, supports, nuts, washers, bushings, etc., shall be
furnished and installed by the electrical contractor.
f) All materials and equipment, installed under this contract shall be firmly
supported and secured to the structure where required.
g) All metal items for use outdoors or in damp locations shall be stainless steel.
h) Current Transformer (CT) cabinets shall comply with the requirements of the
electric utility company.
i) Meter Boxes shall comply with the requirements of the electric utility company.
j) All concrete pads for electrical equipment shall be minimum 3,000 psi, twenty-
eight (28) day compressive strength concrete, or as directed by the Engineer or
County staff. Pads shall be a minimum four (4) inches larger, in all directions,
than the equipment being supported. Use reinforcement as specified in the
approved plans, Contract Documents, Specifications, or as directed by the
Engineer and / or County staff.
6.0 Electrical Equipment Identification
a) Cable labels:
1) Colored adhesive tape, self-adhesive, not less than 3 mils thick by one (1)
to two (2) inches wide.
2) Permanent, heat shrinkable conductor labels.
3) Underground line warning tape, permanent, bright, continuous printed,
vinyl tape, not less than six (6) inches wide by four (4) mils thick,
compounded and approved for direct burial, embedded continuous
metallic strip or core, printed legend shall indicate the type of underground
conductor, installed directly above the underground cable at six (6) to
eight (8) inches below finished grade.
b) Nameplates and signs:
1) Safety signs — comply with 29 CFR, Chapter XVII, Part 1910.145
2) Engraved plastic nameplates and signs, melamine plastic laminate,
minimum one -sixteenth (1/16) inch thick for signs up to twenty (20)
square inches, and one -eighth (1/8) inch thick for larger sizes, engraved
legend, black letters on white face.
3) Nameplates and signs shall be fastened to electrical equipment with high
performance, double coated tape with adhesive, design basis 3M # 0683,
or approved equal.
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September 2012 Brunswick County Engineering Department Revision 1.00
c)
a
e)
Installation:
1) All unit equipment shall contain individual unit nameplates. Nameplates
will also be provided on all individual dry type transformers, individual
panel boards, control panels, motor control centers, disconnect switches,
enclosed circuit breakers, motor starters, push button stations, contactors,
control devices, automatic transfer switches, safety switches, and
combination starters.
2) All pilot lights will include laminated plastic nameplates indicating status
of equipment being monitored.
3) If equipment identification will be applied to surfaces that require a finish
the electrical contractor shall install the identification after completing the
finish work.
Control Cables Labels:
1) Permanent, heat shrinkable matching labels, installed on both ends of each
control and instrumentation conductor and cable, for pump stations the
label text shall match that of the County pump station SCADA / RTU and
pump control panel drawings.
Secondary Phase Conductors:
1) Phase conductors shall be color coded in accordance with the National
Electrical Code (NEC) and the following colors:
a) 120 / 240 VAC
b) 120 / 208 VAC
Phase A:
Black
Phase A:
Black
Phase B:
Red
Phase B:
Red
Neutral:
White
Phase C:
Blue
Ground:
Green
Neutral:
White
Ground:
Green
b) 277 / 480 VAC
Phase A:
Brown
Phase B:
Orange
Phase C:
Yellow
Neutral:
Grey
Ground:
Green with
yellow stripes
2) Colors shall be factory applied the entire conductor length, except the
following field -applied; color coding methods may be used for wire sizes
larger than No. 10 AWG:
a) Colored, pressure sensitive plastic tape in half -lapped turns for a
distance of six (6) inches from terminal points and in boxes where
splices or taps are made. Apply last two (2) turns of tape with no
tension to prevent possible unwinding. Use one (1) inch wide tape
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September 2012 Brunswick County Engineering Department Revision 1.00
in the colors specified. Adjust tape bands to avoid obscuring the
cable identification markings.
7.0 Conductors and Cables
a)
Approved manufacturers:
1) American Insulated Wire Corporation (a Leviton company)
2) General Cable Corporation
3) Houston Wire and Cable
4) Kerite Cable
5) Okonite
6) Senator Wire and Cable Company
7) Southwire Company
8) or approved equal.
b)
Conductor material: copper, stranded conductors for all sizes.
c)
Conduction Insulation Types: THHN-THWN
8.0 Conductor
and Insulation Applications
a)
Use type THHN-THWN, single conductors in raceway for:
1) Service Entrance
2) Feeder concealed in concrete and below slabs -on -grade
3) Exposed Branch Circuits
4) Branch Circuits concealed in concrete and below slabs -on -grade
5) Class 1 Control Circuits
b) Use manufacturer approved pulling compound or lubricant where necessary;
compound used must not deteriorate the conductor or insulation; do not exceed
manufacturer's recommended maximum pulling tension and sidewall pressure
values.
c) Use pulling means, including fish tape, cable, rope, and basket weave wire / cable
grips that will not damage cables or raceways.
d) Identify and label conductors and cables prior to pulling in raceways.
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September 2012 Brunswick County Engineering Department Revision 1.00
9.0 Connectors and Splices
a) Approved manufacturers, wirenuts:
1) AMP, Inc. / Tyco International
2) Cooper
3) GB
4) Ideal
5) King
6) Thomas and Betts
7) 3M Company
8) or approved equal
b) Approved manufacturers, pre -insulated connectors:
1) FCI
2) Greaves
3) Ilsco
4) NSI
5) Penn Union
6) or approved equal
c) Factory fabricated connectors and splices of size , ampacity rating, material, type,
and class for application and service indicated, pre -insulated connectors shall
have one (1) spare port for future connection.
d) For conductors # 8 and smaller use wirenut type twist connectors.
e) For conductors # 6 and larger use pre -insulated solderless connectors with one
spare port for future connections.
f) Pump cable connectors:
1) For conductors # 8 and smaller use waterproof wirenut type twist
connectors, design basis shall be King DryConn.
2) For conductors # 6 and larger use waterproof pre -insulated solderless
connectors, design basis shall be NSI Polaris Blue.
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September 2012 Brunswick County Engineering Department Revision 1.00
g) Tighten all electrical connectors, splices, and terminals according to the
manufacturer's published torque tightening values. If manufacturer's torque
values are not indicated the electrical contractor shall use those specified in UL
486A and UL 48613.
10.0 Field Quality Control
a) After installing conductors and cables, and prior to energizing any electrical
circuitry, the electrical contractor shall inspect the installed system for damage.
b) Make splices and taps that are compatible with the conductor material and that
possess equivalent or better mechanical strength and insulation ratings than
unspliced conductors.
c) Inspect for any physical damage and test conductors and cables for continuity and
shorts:
1) Megger test
a) All current carrying phase conductors and neutrals shall be tested
as installed, and before connections are made, for insulation
resistance and accidental grounds. This shall be done with a five
hundred (500) volt megger.
Minimum readings between conductors and between a conductor
and the grounded metal raceway shall be:
• 25 mega -ohms for # 6 and smaller conductors
• 50 mega -ohms for # 4 and larger conductors
b) The electrical contractor shall correct any malfunctioning
conductors and cables, including replacement if necessary, and
retest to demonstrate compliance and satisfactory testing results.
2) Control and Signal Transmission Media Testing:
a) Test cable segments for faulty connectors, splices, terminations,
and the integrity of the cable and its component parts.
b) Correct malfunctioning conductors and cables at the project site,
where possible, and retest to demonstrate compliance; otherwise,
remove and replace with new units and retest until satisfactory
results are obtained.
3) Neutral — ground bond testing:
a) After all fixtures, devices, switches, and equipment are installed
and all connections completed to each panel, the electrical
contractor shall disconnect the neutral feeder conductor from the
neutral bar and take a megger reading between the neutral bar and
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September 2012 Brunswick County Engineering Department Revision 1.00
the grounded enclosure.
b) If the megger reading is less than twenty-five (25) mega -ohms, the
electrical contractor shall then disconnect the branch circuit neutral
wires from the neutral bar and test each branch circuit neutral
separately, conductor to grounded enclosure, until the low reading
ones are identified. The electrical contractor shall correct are
troubles, reconnect all the branch circuit neutral wires back to the
neutral bar, and re -test until a minimum twenty-five (25) mega -
ohms from the neutral bar to the grounded enclosure can be
achieved with only the neutral feeder disconnected.
d) The electrical contractor shall furnish a megger and demonstrate to the Engineer
and County staff the conductors and electrical panels comply with the above
requirements.
11.0 Raceways and Boxes
a) Approved manufacturers, metallic conduit and tubing:
1)
Anamet Electrical, Inc.
2)
Grinnell Company / Tyco International
3)
LTV Steel Tubular Products Company
4)
Manhattan / CDT / Cole -Flex
5)
O-Z Gedney
6)
Wheatland Tube Company
7)
or approved equal.
b) Approved
manufacturers, non-metallic conduit and tubing:
1)
American International
2)
Anamet Electrical, Inc.
3)
Arnco
4)
Cantex
5)
Certainteed
6)
Condux International
7)
ElecSYS
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September 2012
Brunswick County Engineering Department Revision 1.00
8)
Electri-Flex
9)
Heritage Plastics Centeral, Inc.
10)
Lamson & Sessions / Carlon Electrical Products
11)
Manhattan / CDT / Cole -Flex
12)
Queen City Plastics
13)
RACO
14)
Southern Pipe, Inc.
15)
Spiralduct, Inc. / AFC Cable Systems, Inc.
16)
Thomas & Betts
17)
or approved equal.
c) Approved manufacturers, metal wireways:
1) Hammond
2) Hoffman
3) Rittal
4) Square D
5) or approved equal.
d) The electrical contractor shall include fittings, accessories, couplings, offsets,
elbows, adapters, expansion joints, hold down straps, end caps, terminations, and
other fittings as needed to match and mate with conduit, tubing, and wireways as
required to produce the complete electrical system.
e) Wireway covers shall be the flanged and gasketed type.
f) Approved manufacturers, boxes, enclosures, and cabinets:
1) Austin
2) Hoffman
3) or approved equal.
g) Cast metal outlet, device, pull, and junction boxes shall be NEMA FB 1, with
gasketed covers.
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September 2012 Brunswick County Engineering Department Revision 1.00
h) All conduit at a Brunswick County sewer pump station shall be Schedule 80 PVC
unless otherwise directed by the Engineer or County staff.
i) The minimum conduit or raceway size shall be 3/4 - inch trade size.
j) Raceway fitting shall be compatible with raceways and suitable for use and
location in every respect.
k) Condulet fittings, such as LBs, LLs, LRs, Cs, and Ts, are not allowed in
Brunswick County sewer pump stations.
1) All conduits in County sewer pump stations shall enter the bottom of electrical
equipment and enclosures with a watertight hub, Myers or approved equal, as
shown on the Brunswick County pump station Standard Details.
m) Complete the raceway and / or conduit installation prior to installing conductors.
n) Provide adequate support(s) as needed for raceways and conduits.
o) Install temporary closures to prevent foreign matter from entering raceways,
conduit, and tubing.
p) Protect stub -ups from damage where conduits rise above finished grade. Arrange
such that curved portions of bends are not visible above the finished grade.
q) For raceways and conduit between enclosures within a County sewer pump
station the electrical contractor shall route the conduit from one enclosure to the
next below grade, a minimum of eighteen (18) deep, with the conduit bends non -
visible below grade. Refer to County pump station Standard Details. Horizontal
raceways and conduits shall not be visible above grade.
r) Bends and offsets shall be made such that the interior diameter (I.D.) of the
conduit is not reduced.
s) Raceways and conduits embedded in concrete slabs shall be installed in the
middle 1/3 of the slab with a minimum of two (2) inches of concrete cover.
Secure conduit to reinforcing rods to prevent sagging or shifting during concrete
pouring operations.
t) Join raceways and conduits with fittings designed and approved for that purpose
and make joints tight.
u) Insulating bushings are required on conduit terminations inside enclosures to
protect the conductors.
v) Grounding and bonding bushings are required inside enclosures as required by the
National Electrical Code.
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September 2012 Brunswick County Engineering Department Revision 1.00
w) Conduit terminations inside enclosure shall be square and true, with threaded
hubs, locknuts, and bushings, and securely tightened with the dished side of the
locknut against the enclosure.
x) Install pull wires in empty raceways and conduits for future use. Use
polypropylene or monofilament plastic line with a minimum two hundred (200)
pound tensile strength. Leave a minimum of twelve (12) inches of slack at each
end of pull wire.
y) Install raceway and conduit sealing fittings at suitable, approved, and accessible
locations and fill with UL listed sealing compound or as directed by the Engineer
or County staff.
12.0 Wiring Devices
a) Wiring devices are duplex receptacles, ground fault protected duplex receptacles,
ground fault circuit breakers, standard circuit breakers, arc fault protected duplex
receptacles, arc fault circuit breakers, single pole snap switches, double pole snap
switches, device plates, and other similar equipment.
b) Wiring devices shall be listed and labeled as defined in the National Electrical
Code, Article 100, by a testing agency acceptable to the Authority Having
Jurisdiction (AHJ), and marked for intended use.
c) All receptacles for owner furnished equipment shall match the plug configuration
of the Owner's equipment.
d) Acceptable Manufacturers:
1) Bryant Electric, Inc. / Hubbell Subsidiary
2) Eagle Electrical Manufacturing Company, Inc.
3) Hubbell Incorporated
4) Leviton Manufacturing Company, Inc.
5) Pass & Seymour / Legrand
6) or approved equal.
e) Snap switches shall be heavy duty grade, quiet type, UL listed.
f) Receptacles shall be straight blade type, heavy duty type, UL listed.
g) Ground fault circuit interrupter (GFCI) receptacles shall be the straight blade type,
feed — through capability, heavy duty, UL listed, NEMA rated, 20 ampere
minimum, install in a minimum 2 1/4 inch deep outlet box without the use of an
adapter ring.
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September 2012 Brunswick County Engineering Department Revision 1.00
h) Device plates shall be single and combination types as required to match
corresponding wiring devices.
i) Install level, plumb, and square, flush with finished wall, with long dimension
vertical, unless otherwise directed, and with grounding terminal of receptacles on
top, group adjacent switches under single, multigang wall plates.
j) Ground and bond all wiring devices and equipment in accordance with Article
250 of the National Electrical Code.
k) Tighten electrical connectors and terminals according to manufacturer's published
torque tightening values. If manufacturer's torque values are not indicated, use
those specified in UL 486A and UL 48613.
1) After installing wiring devices and after the electrical circuitry has been energized
the electrical contractor shall test all devices for proper voltage, polarity, ground
continuity, and compliance with all National Electrical Code and local
requirements.
m) The electrical contractor shall test all GFCI devices for proper operation,
according to the manufacturer's written instructions, after the electrical circuitry
has been energized,
n) The electrical contractor shall replace all malfunctioning units with new units and
re -test as specified above.
13.0 Protection of Completed Work
a) The electrical contractor shall effectively protect his work, materials and
equipment from damage during the construction period. All openings into any
part of the conduit system, associated fixtures and equipment must be securely
covered or otherwise protected. Steel conduit and other ferrous metal supplies
shall be stored where they will not be exposed to corrosion.
14.0 Final Inspections and Equipment Demonstrations
a) The electrical contractor shall furnish ladders, tools, testing, equipment, and
employees at the time of final electrical inspection to allow the Engineer, County
staff, and the Authority Having Jurisdiction (AHJ) inspector access to all fixtures,
boxes, panels, etc., as needed in order to successfully pass the final electrical
inspection.
b) The electrical contractor shall furnish all clamp -on type ammeter, voltmeter,
megger, ground resistance tester, etc., as needed for system testing and final
inspection.
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September 2012 Brunswick County Engineering Department Revision 1.00
15.0 Operating Instructions
a) At the completion of the work, and after obtaining the final electrical inspection,
the electrical contractor shall operate, in the presence of the Engineer and County
staff, each component of the system and then the entire system as a whole. When
all the requirements of the approved plans and specifications have been met and
all final punch list items corrected, the electrical contractor shall instruct and train
the County operating and maintenance personnel in the correct and proper
procedures for the operation and maintenance of the electrical system.
16.0 Spare Parts
a) The electrical contractor shall provide any spare parts as required by the approved
plans, Contract Documents, and Specifications. The parts shall be properly
packaged and labeled with the name of the project and delivered to Brunswick
County staff.
17.0 Payment
a) The electrical work shall be bid as specified in the Contract Documents, either
Lump Sum or on a Unit Cost basis. All incidental material required to produce
the complete system shall be included in the Lump Sum or Unit Cost bid. No
separate payment will be made for incidental material required to produce the
finished work.
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September 2017 Brunswick County Engineering Department Revision 1.01
Technical Specification 029
ELECTRICAL SERVICES
1.0 General
a) The intent of this specification is to provide technical guidance and requirements
to the contractor for the installation of electrical services at county owned pump
stations, buildings, and other installations. The contractor shall provide all labor,
materials, tools, equipment, and related items required to furnish, install, and
place into operation the required electrical service as shown on the approved plans
provided by the Engineer.
b) The contractor shall also obtain all electrical permits from the Authority Having
Jurisdiction (AHJ) for the work shown on the approved plans prior to beginning
work.
2.0 Reference Standards
a) All electrical services shall comply with these reference standards and also with
all local codes and ordinances:
1) NEC — National Electrical Code
2) OSHA — Occupational Safety and Health Administration
3) ANSI — American National Standards Institute
4) IEEE — Institute of Electrical and Electronics Engineers
5) NEMA — National Electric Manufacturers Association
6) Brunswick County Standard Details
7) Brunswick County Technical Specification TS 028: General Electrical
Information
8) Brunswick County Technical Specification: TS 030: Grounding and
Bonding
9) Brunswick County Technical Specification: TS 031: Surge Protection
3.0 Coordination
a) The electrical contractor shall be responsible for coordinating with the utility
company and assisting the Owner with obtaining a permanent electrical service
as shown on the approved plans.
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September 2017 Brunswick County Engineering Department Revision 1.01
b) The electrical contractor shall represent the Owner and acquire all service
agreements, etc., and coordinate with the Owner to obtain all required signatures
and return the documents to the utility company after execution as required.
4.0 Installations
a) All electrical work shall be performed in accordance with the National Electrical
Code and the Authority Having Jurisdiction.
b) All permits for the electrical work shall be obtained and paid for by either the
general contractor or the electrical contractor. All inspections, tests, or additional
fees required for the completion of the work shall also be paid for by either the
general or electrical contractor. Determination of who pays the required fees shall
be a coordination issue between the general and electrical contractor.
c) All materials and equipment shall be new and include a third -party label such as
UL, CSA, ETL, etc., listing approval for its installed application.
d) The electrical contractor shall review and be familiar with the plans of other
trades for coordination of the work and related and adjoining work.
e) Any discrepancies in the approved drawings and specifications that will affect the
work shall be brought to the attention of the architect and / or engineer for
resolution prior to submitting bids for the project.
f) The contractor shall provide all National Electrical Code clearances for all
installed electrical equipment. Any conflicts with other trades or inadequate
clearances shall be brought to the attention of the architect and / or engineer by
the electrical contractor for clarification and resolution.
g) Penetrations of structure walls, floors, and roofs shall be sealed watertight.
Interiors of raceway penetrations shall be sealed with non -hardening electrical
putty. All conduit connections at equipment, enclosures, and a pump station
wetwell shall also be sealed with non -hardening electrical putty.
h) All hardware exposed to the weather shall be stainless steel.
i) All conduits shall enter the bottom only of electrical equipment. Myers watertight
hubs, or approved equal, shall be used in outdoor applications.
j) Conduit outlet bodies and / or condulets such as LBs, LLs, and LRs are not
allowed unless specifically approved by Brunswick County.
k) The electrical contractor and any of his subcontractors shall visit the project site
to observe the existing conditions and become familiar with the scope of work
required prior to submitting bids. Work required by existing job conditions not
indicated on the drawings shall be included in the bid.
1) Shared neutral conductors are not allowed.
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September 2017 Brunswick County Engineering Department Revision 1.01
m) The general or electrical contractor shall install all required concrete pads for
utility transformers, standby emergency power generators, vaults, etc., per County
standard details and / or any requirement of the utility company. The electrical
contractor shall coordinate all equipment pad requirements with the utility
company.
n) The electrical contractor shall coordinate the electrical services, metering, and
metering equipment with the utility company for locations, arrangements,
connections, etc.
o) The electrical service entrance raceways shall be installed by the electrical
contractor and sized as shown on the approved plans, contract drawings, or as
required by the utility company. Service entrance conductors will be provided
and installed by the utility company to the line side of the metering equipment.
Service entrance conductors from the metering equipment to the service
equipment shall be installed by the electrical contractor.
p) Current transformer (CT) cabinets and self-contained meter cabinets shall be
installed by the electrical contractor unless directed otherwise by the utility
company. Load side connections shall be made by the electrical contractor.
Coordinate metering requirements with the utility company before beginning
rough -in of service raceways.
q) Sewer pump station services shall be 277/480 VAC, 3 phase WYE, 4-wire, unless
otherwise directed by Brunswick County.
r) The electrical contractor shall provide all equipment, grounding, bonding, and
additional empty conduit as shown on the approved plans, contract documents,
and /or as required by the utility company.
s) All ground wires shall be exothermically welded to ground rods as shown on the
County Standard Details and per Brunswick County Technical Specification TS
030.01: Grounding and Bonding.
t) All concrete shall be 3,000 psi, 28-day compressive strength concrete.
Reinforcement shall be as shown on the approved plans, contract documents,
county Standard Details, county Technical Specifications, or as directed by the
Engineer and / or county staff.
u) An operating test with the Engineer and county staff present is required once the
final electrical inspection has passed, and the permanent meter has been obtained
from the utility company, to demonstrate that the electrical installation is
operating properly.
v) All conduit installed in county sewer pump stations shall be Schedule 80 PVC
unless otherwise approved by Brunswick County.
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September 2017 Brunswick County Engineering Department Revision 1.01
5.0 Submittals
a) The electrical contractor shall submit shop drawings and other submittals to the
Engineer for review and approval prior to beginning work.
6.0 Payment
a) No separate payment will be made for electrical services. All costs incurred by
the contractor for this work should be included in the unit price or lump sum price
for the item of work to which it pertains.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 030
GROUNDING AND BONDING
1.0 General
a) This specification provides general guidance on the grounding and bonding
requirements for electrical systems and equipment.
b) The electrical contractor shall furnish all labor, materials, tools, equipment and
related items required to furnish and install all required electrical grounding and
bonding as required by the National Electric Code (NEC).
2.0 Reference Standards
a) All electrical grounding and bonding shall comply with these reference standards
and also with all local codes and ordinances:
1) NEC — National Electrical Code
2) OSHA — Occupational Safety and Health Administration
3) ANSI — American National Standards Institute
4) IEEE — Institute of Electrical and Electronics Engineers
5) NEMA — National Electric Manufacturers Association
6) Brunswick County Standard Details
7) Brunswick County Technical Specification TS 028: General Electrical
Information
8) Brunswick County Technical Specification TS 029: Electrical Services
9) Brunswick County Technical Specification TS 031: Surge Protection
3.0 Submittals
a) The electrical contractor shall submit shop drawings and other submittals to the
Engineer for review and approval prior to beginning work.
4.0 Grounding and Bonding Conductors
a) Install all grounding and bonding in accordance with the National Electrical Code
Article 250: Grounding and Bonding.
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September 2012 Brunswick County Engineering Department Revision 1.00
b) All grounding electrode conductors at County sewer pump stations shall be
exothermically welded to the pump station grounding electrodes per County pump
station Standard Details.
c) Comply with any other special instructions in the approved drawings or as
directed by the Engineer or Brunswick County staff.
5.0 Field Quality Control
a) If a maximum ground -resistance level has been specified in the Contract
Documents the electrical contractor shall test the completed grounding system at
each location where a ground -resistance level is specified, at the service
disconnect enclosure grounding terminal, at all ground test wells, and / or as
directed by the Engineer.
1) NEC Article 250 requires a single electrode consisting of a rod, pipe, or
plate to have a resistance to ground of twenty-five (25) ohms or less, or an
additional electrode must be installed.
b) The electrical contractor shall measure ground resistance not less than two (2) full
days after the last trace of precipitation, and without the soil being moistened by
any means other than natural drainage or seepage, and without chemical treatment
or other artificial means of reducing the natural ground resistance.
c) Perform the ground resistance tests in accordance with IEEE — 81: Guide for
Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of
a Ground System
d) Provide drawings locating each ground rod and ground rod assembly and other
grounding electrodes, and identify each by letter in alphabetical order, and keyed
to the record of tests and observations. Include the number of ground rods driven
and their depth at each location and include observations of weather and other
phenomena that my affect the test results. Describe any measures taken to
improve test results.
e) If resistance to ground exceeds the specified values the electrical contractor shall
notify the Engineer and include any recommendations to reduce the ground
resistance to meet the specified requirements.
6.0 Payment
a) No separate payment will be made for Grounding and Bonding. All costs
incurred by the electrical contractor for this work should be included in the unit
price or lump sum price for the item of work to which it pertains.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 031
SURGE PROTECTION
1.0 General
a) This specification details the surge protection system to be installed on Brunswick
County electrical services and sewer pump station control panels to protect the
enclosures from transient voltages that may damage or disable electrical
equipment.
2.0 Reference Standards
a) NEC — National Electrical Code
b) OSHA — Occupational Safety and Health Administration
c) ANSI — American National Standards Institute
d) IEEE — Institute of Electrical and Electronics Engineers
IEEE C62.41: IEEE Recommended Practice for Surge Voltages in Low
Voltage AC Power Circuits
e) NEMA — National Electric Manufacturers Association
NEMA ICS 1: Industrial Control and Systems General Requirements
f) Brunswick County Pump Station Standard Details
g) Brunswick County Technical Specification TS 028: General Electrical
Information
h) Brunswick County Technical Specification TS 029: Electrical Services
i) Brunswick County Technical Specification TS 030: Grounding and Bonding
3.0 Acceptable Manufacturers
a)
Square D company
b)
General Electric
c)
Siemens
d)
or approved equal
4.0 Submittals
a) The electrical contractor shall submit shop drawings and other submittals to the
Engineer for review and approval prior to beginning work.
5.0 Installation
a) Electrical services for County buildings and projects other than sewer pump
stations — the electrical contractor shall install the transient voltage surge
arrestor shown on the approved plans or in the Contract Documents.
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September 2012 Brunswick County Engineering Department Revision 1.00
b) County sewer pump station control panels:
1) 277 / 480 VAC, 3- phase panels - install a Square D surge arrestor, 600
VAC, 3 - phase, with LED indicator, part number SDSA3650, per County
pump station standard details.
2) Other than 277/ 480 VAC pump stations — contact Brunswick County
Public Utilities for approved transient voltage surge arrestor to use.
6.0 Payment
a) No separate payment will be made for surge protection equipment. All costs
incurred by the electrical contractor for this work should be included in the unit
price or lump sum price for the Electric Service, or to the item of work to which it
pertains.
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September 2012 Brunswick County Engineering Department Revision 1.00
Technical Specification 035
ELECTRONIC MARKER BALLS FOR
WATER AND SEWER FORCE MAINS
1.0 General
a) It is the intent of this specification to provide technical guidance on the proper
installation of electronic marker balls for water and sewer mains sewer mains
installed in the service area of the Brunswick County Public Utilities Department.
b) The standard utility line locator material is a #12 AWG, high strength, copper
clad steel conductor (HS — CC) tracer wire such as Copperhead SuperFlex, or
approved equal.
c) Electronic marker balls are also required for:
1) Non-ferrous water mains and sewer force mains eight (8) inches in
diameter and larger,
2) Ferrous water mains and sewer force mains greater than twelve (12)
inches in diameter.
d) Contact Brunswick County for additional information and questions concerning
the proper installation and required usage of electronic marker balls.
2.0 Materials
a) Electronic marker balls shall be:
1) Water: 3M Scotchmark Electronic Marker, model # 1403-XR, 4 — inch
diameter, colored blue
2) Sewer: 3M Scotchmark Electronic Marker, model # 1404-XR, 4 — inch
diameter, colored green
3) Reclaimed Water: 3M Scotchmark Electronic marker, model #1408-XR,
4 - inch diameter, colored purple
b) The markers consist of a sealed shell containing a passive antenna with a low
frequency resonance circuit tuned to a certain frequency depending upon the
associated utility. For water and sewer systems the frequencies are:
1) Water: 145.7 kHz
2) Sewer: 121.6 kHz
3) Reclaimed Water: 66.3 kHz
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September 2012 Brunswick County Engineering Department Revision 1.00
c) The locator sends a signal to the marker, which energizes the marker, and the
marker reflects the signal back to the locator. The markers are installed during
new construction or repairs to system mains as specified herein.
3.0 Requirements for Electronic Marker Placement
4.0
a) Electronic marker balls shall be placed at:
Tees Bends Repair points
Crosses Utility crossings Service laterals
Casing ends Water crossings Service stubs
Arcs Rail crossings
and at all changes in pipe diameter.
b) Refer to the Brunswick County Electronic Marker Ball Placement
Standard Detail.
Electronic Marker Installation, Spacing, and Depth
a)
Minimum depth of burial:
b)
Nominal depth of burial:
c)
Maximum depth of burial:
d)
Minimum height above the main:
e)
Minimum distance between markers:
f)
Nominal distance between markers:
g)
Maximum distance between markers:
h)
i)
J)
18 inches
24 inches
48 inches
6 inches
3.5 feet
100 feet
200 feet
On bends and lateral pipe deflections place one marker ball every (25) feet
Markers to be installed above any installed main marking tape
Refer to the Brunswick County Electronic Marker Ball Placement
Standard Detail.
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