PUBLIC WORKS UTILITIES CRITERIA (PWUC)

PUBLIC WORKS UTILITIES CRITERIA

(PWUC)

For Design & Construction:

Electric, Sewer & Water

NAVFAC MARIANAS (NAVFACMAR) PWUC

Revision 2: 15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015

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NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 i

PUBLIC WORKS UTILITIES CRITERIA DESIGN AND CONSTRUCTION: ELECTRICAL,

SEWER, and WATER

Record of Revisions / Changes

Revision #

Date

Description of Changes

02 April 2015

Chapter 1, Section 1.2 & 1.4 added sentence to

include AAFB

Chapter 2, Added new Section 2.1.1 – 2.1.1.2

Government Services; Updated Section 2.3.4 –

2.3.4.1 Metering; Added SCADA Section 2.3.7 –

2.3.7.2.3

Chapter 3, Updated Section 3.3.12 Meters; Added

SCADA Section 3.3.15 – 3.3.15.2.3

Chapter 4, Updated Section 4.4.1 Water Meters;

Added SCADA Section 4.5.8 – 4.5.8.2.3

Chapter 5, Replaced with New Chapter 5, Smart

Grid Section 5.1 – 5.2

15 November 2018

PWUC - Re-format the whole document, Significant

re-write.

Chapter 1, Updated Section 1.1 – added

“Designers”, changed “encouraged” to “required”;

Updated Section 1.2 to indicate “NAFACMAR Public

Works Utilities on Guam.”; Updated Section 1.3 -

changed “and” to “but it”; Updated Section 1.4 –

clarified that electrical distribution is medium voltage

(not high) and added reference to GUARNG

Barrigada Complex; Updated Section 1.5 – Changed

“Utilities” to “UEM”; Updated Section 1.6 – Complete

re-write (incorporated requirement of previous

sections 1.7 & 1.8); Added/Revised Section 1.7 –

Utilities Connections; Added/Revised Section 1.8 –

Meter Installation & Removal; Added Section 1.9 –

Government Services; Added Section 1.10 – BOSC

Services; Added Section 1.11 – Utility Outages;

Added Section 1.12 – Availability of Utilities for

Contractors; Revised previous section 1.9 – now

Section 1.13 references.

Chapter 2 – Updated Section 2.1 – Changed

“Utilities” to “UEM”, significant re-write – removed

section 2.1.1 (requirement is now in Chapter 1);

Updated Sections 2.3.1.7, 2.3.1.9, 2.3.2.2, 2.3.2.8,

2.3.3, 2.3.4, 2.3.5.2, 2.3.5.3; Added 2.3.5.4 -

“Sectionalizing Termination Cabinet (STC)”; Updated

Section 2.3.7, 2.3.8, 2.3.8.1 and 2.3.8.3; Updated

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 ii

Section 2.3.9.4 - Changed “170 MPH” to “180 MPH”;

Updated Section 2.3.10; Updated Section 2.4 – now

“Equipment, Spare Parts & Special Tools”, remove

previous section 2.4.1 related to “utilities for

contractors”; Updated previous Section 2.4.1.3 &

2.4.1.4 – now section 2.4.1.1 & 2.4.1.2; Updated

Section 2.4.4 and added new Section 2.4.4.1.e;

Updated Section 2.4.13.; Removed section 2.8.

Chapter 3 – Updated Section 3.1.9; Removed

Section 3.1.10 (requirement included in Chapter 1);

Updated Section 3.2.1, 3.2.2, 3.2.13, 3.3.12, 3.3.15,

3.3.17, 3.3.19, & 3.5.2; Removed Section 3.7.

Chapter 4 - Updated Section 4.2.1; Updated Section

4.2.7.2 – Changed “…class 200 (DR 14).” to

“….class 235 (DR 18)”; Updated Section 4.2.8;

Updated Section 4.4.1 – complete rewrite; Updated

Section 4.11 – removed “References”, now

“Construction Notes”.

Chapter 5 – Renamed from “SMARTGRID” to

“COMMUNICATIONS & CYBERSECURITY”;

Significant rewrite

Appendices - Added Appendix 1-7

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NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 iv

TABLE OF CONTENTS

CHAPTER 1 - INTRODUCTION ..................................................................................... 1

1.1 GENERAL INFORMATION ............................................................................ 1

1.2 OBJECTIVE ................................................................................................... 1

1.3 PURPOSE AND SCOPE ................................................................................ 1

1.4 APPLICABILITY ............................................................................................. 1

1.5 WAIVER ......................................................................................................... 2

1.6 PROJECT SUBMITTALS ............................................................................... 2

1.7 UTILITIES CONNECTIONS ........................................................................... 2

1.8 METER INSTALLATION & REMOVAL .......................................................... 2

1.9 GOVERNMENT SERVICES ........................................................................... 2

1.10 BASE OPERATING SERVICES CONTRACTOR (BOSC) SERVICES ......... 3

1.11 UTILITY OUTAGES ........................................................................................ 3

1.12 AVAILABILITY OF UTILITIES FOR CONTRACTORS .................................. 4

1.12.1 Paying for Utilities ........................................................................................ 4

1.12.2 Contractor Account / Job Order Numbers .................................................. 4

1.13 REFERENCES ............................................................................................... 5

CHAPTER 2 – ELECTRIC .............................................................................................. 6

2.1 GENERAL INFORMATION ............................................................................ 6

2.2 PRIMARY DISTRIBUTION SYSTEM CHARACTERISTICS .......................... 6

2.2.1 System Voltages ........................................................................................... 6

2.2.2 System Configuration ................................................................................... 6

2.3 EQUIPMENT .................................................................................................. 8

2.3.1 Transformers ................................................................................................. 8

2.3.2 Switchgears ................................................................................................. 10

2.3.3 Relaying ....................................................................................................... 11

2.3.4 Metering ....................................................................................................... 12

2.3.5 Cables .......................................................................................................... 15

2.3.6 Substations (End-of-Line). ......................................................................... 16

2.3.7 SCADA ......................................................................................................... 17

2.3.8 Manholes/Handholes .................................................................................. 18

2.3.9 Overhead Distribution Systems ................................................................. 19

2.3.10 Miscellaneous Equipment .......................................................................... 19

2.4 SPECIFICATIONS ........................................................................................ 20

2.4.1 Equipment, Spare Parts & Special Tools .................................................. 20

2.4.2 Relays ......................................................................................................... 20

2.4.3 Switching ..................................................................................................... 21

2.4.4 High Voltage Cables ................................................................................... 21

2.4.5 Outages ...................................................................................................... 21

2.4.6 Pier (Shore) Power Outlet Assemblies and Cables ................................. 22

2.4.7 Conductors ................................................................................................. 22

2.4.8 Asbestos, Other Environmental Hazards and Personnel Safety ........... 22

2.4.9 Equipment Operation and Maintenance Manuals ................................... 22

2.4.10 Prevention of Damage to Underground Utilities ..................................... 23

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 v

2.4.11 Emergency Eyewash Equipment .............................................................. 23

2.4.12 Warning Signs ............................................................................................ 23

2.4.13 Energization ............................................................................................... 23

2.5 SYSTEM ADEQUACY .................................................................................. 23

2.5.1 Contractor/Designer’s Responsibility ....................................................... 23

2.5.2 System Coordination & Design Analysis .................................................. 24

2.6 DUCT ASSIGNMENT ................................................................................... 24

2.7 TELECOMMUNICATION (INCLUDING TELEPHONE, CATV, AND FIBER

OPTIC CABLES) .......................................................................................................... 24

CHAPTER 3 - SEWER ................................................................................................ 25

3.1 GENERAL INFORMATION. ......................................................................... 25

3.1.1 Subsurface Oil............................................................................................. 25

3.1.2 Existing Underground Utility Lines. .......................................................... 25

3.1.3 Diversion of Sewage/Spills. ....................................................................... 25

3.1.4 Temporary Connections for Contractor Trailers. ..................................... 26

3.1.5 Dewatering into the Sewer Collection System. ........................................ 26

3.1.6 Construction Notes. .................................................................................... 26

3.1.7 Outages. ...................................................................................................... 28

3.2 SEWER LINES. ............................................................................................ 29

3.3 LIFT STATIONS. .......................................................................................... 37

3.4 INDUSTRIAL WASTEWATER DISCHARGE ............................................... 45

3.5 ATTACHMENTS AND FIGURES ................................................................. 46

3.6 Special GWA Requirements for Tie-Ins. ................................................... 63

CHAPTER 4 - WATER ................................................................................................ 64

4.1 GENERAL INFORMATION. ......................................................................... 64

4.2 WATERLINES. ............................................................................................. 66

4.2.9 Cathodic Protection. ................................................................................... 71

4.2.10 Coating for Waterlines under Piers. .......................................................... 71

4.3 WATER VALVES. ........................................................................................ 72

4.3.1 Direction to Open. ....................................................................................... 72

4.3.2 Valve Boxes. ................................................................................................ 72

4.3.3 Corporation Stops for Valves. ................................................................... 74

4.3.4 By-Pass and Gearing. ................................................................................. 74

4.3.5 Butterfly Valves. .......................................................................................... 74

4.3.6 Resilient-Seated Gate Valves. .................................................................... 74

4.3.7 Flange Coupling Adapters. ........................................................................ 74

4.3.8 Anchor Blocks............................................................................................. 74

4.3.9 Service Saddles. ......................................................................................... 74

4.3.10 Backflow Preventers. .................................................................................. 74

4.3.11 Fire Hydrants. .............................................................................................. 75

4.4 WATER METERS. ........................................................................................ 75

4.4.1 Meter Requirements. .................................................................................. 75

4.4.2 Metering Exceptions. .................................................................................. 77

4.4.3 Metering of Lawn Sprinkler Systems. ....................................................... 77

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 vi

4.4.4 Meters 3 Inches and Larger. ...................................................................... 77

4.5 MECHANICAL AND ELECTRICAL EQUIPMENT. ...................................... 77

4.5.1 Equipment. .................................................................................................. 77

4.5.2 Operation and Maintenance (O & M) Manuals. ......................................... 77

4.5.3 Posting of Instructions. .............................................................................. 78

4.5.4 Labeling and Tagging of Electrical Wiring................................................ 78

4.5.5 Training. ....................................................................................................... 78

4.5.6 Special Tool Requirements. ....................................................................... 78

4.5.7 Spare Parts. ................................................................................................. 79

4.5.8 SCADA ......................................................................................................... 79

4.6 MISCELLANEOUS APPURTENANTS. ....................................................... 80

4.7 STORAGE. ................................................................................................... 80

4.8 PUMP STATIONS. ....................................................................................... 83

4.9 WELLS. ........................................................................................................ 84

4.10 CROSS-CONNECTION CONTROL AND BACKFLOW PREVENTION. ..... 84

4.11 CONSTRUCTION NOTES. ........................................................................... 85

CHAPTER 5 - COMMUNICATIONS & CYBERSECURITY ......................................... 86

5.1 OVERVIEW .................................................................................................. 86

5.2 GENERAL REQUIREMENTS FOR ICS ....................................................... 86

5.3 CYBERSECURITY ....................................................................................... 91

APPENDICES:

APPENDIX 1 – FORM - UTILITY CONNECTION PERMIT APPLICATIONS

APPENDIX 2 – INSTRUCTIONS - UTILITY CONNECTION PERMIT APPLICATIONS

APPENDIX 3 – FORMS & INSTRUCTIONS - METER CHANGE RECORD

APPENDIX 4 – FORM - NAVFAC MARIANAS ICS CHECKLIST v2.1

APPENDIX 5 – INDUSTRIAL CONTROL SYSTEM (ICS) BASELINE PROCUREMENT

GUIDANCE v2.1

APPENDIX 6 – FORM - SYSTEM AUTHORIZATION ACCESS REQUEST (SAAR)

FOR INDUSTRIAL CONTROL SYSTEMS (ICS)

APPENDIX 7 – FORM - INFORMATION SYSTEM (IS) PRIVILEGED ACCESS

AGREEMENT AND ACKNOWLEDGMENT (PAA) OF RESPONSIBILITIES

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 1

CHAPTER 1 - INTRODUCTION

1.1 GENERAL INFORMATION

Engineers, Designers and Contractors are required to consult with

NAVFACMAR Public Works Department (PWD) on design and

construction for projects on Public Works Utilities Systems.

Recommended changes and/or deviations to these criteria with supporting

rationale shall be sent to Utilities and Energy Management Product Line

Coordinator (UEM PLC) for review and consideration.

1.2 OBJECTIVE

The purpose of this document is to provide common technical guidance

and to ensure quality and consistency in design and construction for the

NAVFACMAR Public Works Utilities Systems on Guam.

1.3 PURPOSE AND SCOPE

This document prescribes design and construction standards necessary

to support NAVFACMAR Public Works Utilities. It has been developed

from previous “lesson-learned” projects and it is intended for use by

experienced engineers and contractors.

This document does not negate other referenced technical standards and

common industry practices but is provided as additional criteria

specifically for NAVFACMAR Public Works Utilities projects.

This document does not constitute a detailed technical design,

construction, maintenance or operation manual, but it is issued as a

requirement for all NAVFACMAR Public Works Utilities projects.

1.4 APPLICABILITY

This document applies to all designers and contractors preparing design

or performing construction projects involving NAVFACMAR Public Works

Utilities Systems on Guam projects including assets that are under

NAVFACMAR PWD Utilities & Energy Management (UEM) at Navy Base

Guam (NBG), Andersen Air Force Base (AAFB) & Marine Corp Base

Guam (MCBG) (i.e., medium voltage electrical distribution, water

distribution and sanitary sewer systems) and at Guam Army National

Guard (GUARNG) Barrigada Complex (i.e., water distribution and sanitary

systems). Include this document as reference to RFPs.

Designers/Contractor should address any questions to the UEM PLC

regarding applicability for their project.

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 2

1.5 WAIVER

Where a valid need exists and an alternate solution involving sound

engineering and construction is available, designers and/or contractors

can submit request for a criteria waiver to NAVFACMAR PWD UEM.

Requests for waiver should include justification, criteria used, and other

pertinent data.

1.6 PROJECT SUBMITTALS

Provide a minimum of three sets (hard/paper & electronic copies on

optical disc [CD-R or DVD-R]) of design plans (with applicable Basis of

Design, Calculations, Specifications, Response to Comments &

correspondence), Shop Drawings, As-Built plans and Electronic

Operations & Maintenance Systems Information (eOMSI) for review,

comment, acceptance and for record purposes to NAVFACMAR PWD

UEM via Contracting Officer.

Provide As-Built plans & eOMSI submittal to NAVFACMAR Base

Operations Support Contractor (BOSC) technical library & respective

Installation technical library.

Electronic submittals shall include native file formats (Word, Excel, GIS,

AutoCAD, etc.) & pfd.

1.7 UTILITIES CONNECTIONS

The Customer/Customer Representative, Project Manager or Engineer-In-

Charge must contact the UEM as early as in the planning process to verify

the availability of utility services.

Forward the utility connection permit application package (see Appendix 1

& 2 for reference) to the Installation PWD UEM for review & approval.

1.8 METER INSTALLATION & REMOVAL

NAVFACMAR PWD UEM shall be informed of any meter (electric, water &

sewer) installation and removal. Forward the meter change form (see

Appendix 3 for reference) to the Installation PWD UEM for review,

approval & acceptance.

NAVFACMAR UEM Billing & Allocations group shall be informed of the

installation or removal.

1.9 GOVERNMENT SERVICES

Project (MILCON, SRM, Special projects) submittal reviews, facilities

escort, site visits, utility service connections, shall be cost reimbursable

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 3

using project funding, as applicable. Project Manager / Contracting Officer

to coordinate with NAVFACMAR UEM & Financial Management (FM) with

regards to providing funding document & setting up a Job Order Number

(JON).

Escort Services: On occasion, facilities engineering studies/investigations

commissioned by other Navy Activities require others (A-E, outside

consultants or other Navy Personnel) to access secured NAVFACMAR

UEM operational areas (e.g. substation, booster pump facilities, sewer lift

stations, etc.) where qualified NAVFACMAR PWD UEM escorts will be

required. In such instances, the Navy facility sponsor (Project Manager /

Contracting Officer) shall establish a Job Order account with the

NAVFACMAR FM & UEM to reimburse the affected NAVFACMAR PWD

UEM Work Center for escort by qualified maintenance personnel at the

prevailing/established Work Center hourly labor rate. Such escort services

will need to be arranged in advance with the supervisor of the affected

NAVFACMAR PWD UEM Work Center.

The resources of NAVFACMAR PWD UEM or the NAVFACMAR BOSC

shall not be committed to any Project team/Contractor’s work plan without

proper coordination.

1.10 BASE OPERATING SERVICES CONTRACTOR (BOSC) SERVICES

Facilities escort & site visits shall be coordinated with the respective Utility

Annex Contracting Officer Representative (COR) & BOSC Annex

Manager. Project Manager / Contracting Officer to coordinate with

NAVFACMAR UEM & Financial Management (FM) with regards to

providing funding document & setting up a Job Order Number (JON).

1.11 UTILITY OUTAGES

Contractor shall follow provisions in the contract related to utility outage

request.

NBG Utility (Electric, Water & Sewer) outages, De-energization, or

Energization support shall be coordinated with the NAVFACMAR BOSC

Service Support Center. Cost related to Utility service outages /

connections, shall be paid by Contractor to BOSC.

AAFB Utility (Electric) outages, De-energization, or Energization support

shall be coordinated with the NAVFACMAR BOSC Service Support

Center. Cost related to Utility service outages / connections, shall be paid

by Contractor to BOSC.

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 4

AAFB Utility (Water & Sewer) outages support shall be coordinated with

36 CES Customer Service / Operations Support. Cost related to Utility

service outages / connections, shall be paid by Contractor by providing

Job Order Number to Work Center Supervisor when requesting support.

1.12 AVAILABILITY OF UTILITIES FOR CONTRACTORS

Reasonable amount of utilities (normally electricity & potable water) will be

made available to the Contractor at the prevailing rates at the time of use.

Requests for installation of Contractor field offices utility services shall be

forwarded to the Contracting Officer in accordance with the contract

specifications. Request shall include the following information:

a. Site Plan, showing location of Contractor field offices, source/point of

connection of electrical power or water, & proposed route of service

conductors/water line. Plans proposing to route cables in the Navy's

underground distribution system shall indicate the duct(s) to be used.

b. Electric One-Line Diagram, including load (kVA) and voltage

requirements. Meter shall be provided by the contractor.

c. Water One-Line Diagram, including water flow & pressure requirement,

and pipe size. Back flow preventer (BFP) & meter shall be provided by

the contractor.

d. Meter (Electric or Water) & BFP to be used shall be calibrated. Provide

calibration certificate to NAVFACMAR UEM representative.

Calibration certificate shall be effective during the contract duration.

1.12.1 Paying for Utilities

For all construction projects where Government utilities are required for

the Contractor’s use, typically for office trailers, the Navy contractually

requires that the Contractor pay for Government utility service used

(potable water, electricity, sewer, etc.). The Contractor shall also be

responsible for, and pay for, associated costs of connecting,

disconnecting, conveying utilities to the work site, meters, transformers,

backflow preventers, etc. as necessary. Utility billing accounts shall be

established with NAVFACMAR UEM. Coordinate with the Contracting

Officer.

1.12.2 Contractor Account / Job Order Numbers

Contractors performing work shall establish separate job order numbers

with the NAVFACMAR UEM & Financial Management (FM) for the use of

any Navy-supplied electrical, potable water and wastewater provisions

and services to be provided during the construction phase. Such accounts

are usually established through the facilities project / Contract

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 5

administrator. Establish a separate NAVFACMAR Contractor account

(Job Order Number) for required support by Government forces, to

reimburse the affected NAVFACMAR Work Centers for pre-arranged

services, materials and utility consumption. For projects located at the

AAFB, Contractors shall provide Job Order Number to work center

supervisor when requesting support.

Because the primary mission of NAVFACMAR UEM is to ensure reliable

utility services to its customers, Emergency response efforts by

government personnel (including NAVFACMAR BOSC) required to

mitigate a utility emergency situation (i.e. electrical system damage,

sanitary sewage overflows, broken waterlines, etc.) resulting from

construction operations may also be charged to such Contractor accounts.

The resources of NAVFACMAR PWD UEM or the NAVFACMAR BOSC

shall not be committed to any Contractor’s work plan.

1.13 REFERENCES

The “Facilities Criteria (FC)”, “Unified Facilities Criteria (UFC), and “Unified

Facilities Guide Specifications (UFGS)” have valuable information and

requirements relating to subjects that are addressed by these criteria.

Contractor shall comply with the applicable Facilities Criteria (FC), Unified

Facilities Criteria (UFC) and Unified Facilities Guide Specifications

(UFGS) located at http://www.wbdg.org.

If there is a conflict between these criteria and/or other NAVFAC

publications and Government of Guam Standards, the engineer or

contractor shall contact the Contracting Officer or Project Design

Engineer. Where perceived conflicts may exist, the more stringent

requirement will apply. The Contracting Officer or Project Design Engineer

shall contact NAVFACMAR PWD UEM for further guidance.

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 6

CHAPTER 2 – ELECTRIC

2.1 GENERAL INFORMATION

This section covers electrical materials, equipment, and installation

techniques used in general construction for electrical systems to be

maintained by NAVFACMAR PWD UEM.

2.2 PRIMARY DISTRIBUTION SYSTEM CHARACTERISTICS

2.2.1 System Voltages

2.2.1.1 Primary distribution system voltage

Primary distribution system voltage is predominantly and preferred

13.8kV, 3 phase, 3 wire, except in few existing areas with 13.8/7.97kV

and 4.16/2.4kV.

2.2.2 System Configuration

2.2.2.1 Radial Feed - Systems are generally radial in configuration from the main

substations switchgears.

2.2.2.2 Loop Feed - Switches or other means of loop feed capability are required

for new distribution transformers for back feed capabilities.

2.2.2.3 Double Dead Ended with Secondary Tie for Shore Power Stations

2.2.2.4 System Tie Feeders shall not be used to directly supply loads.

2.2.2.5 Dedicated shore power feeders shall not be used to supply non-shore

power loads. Exception: Industrial loads associated with the pier.

Dedicated underground electrical feeders shall provide Shore-to-Ship

power only to ships/vessels. Provide a separate pad mounted transformer

as a source feeder to industrial power at the wharf.

Figure 2-1 shows details for a 60 A industrial receptacle. Figure 2-2 typical

details for a 200 A industrial receptacle.

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 7

Figure 2-1: Typical 60 A Industrial Receptacle

Figure 2-2: Typical 200 A Industrial Receptacle

NAVFACMAR PWUC

15 November 2018

This PWUC supersedes: PWUC dated 14July2011; Revision 1 dated 02April2015 8

2.3 EQUIPMENT

2.3.1 Transformers

2.3.1.1 Size – Distribution transformer size shall be limited to limit the short circuit

current to within economical standard rating of the designed panelboard

size associated with the electrical load. The size limit shall depend upon

the secondary voltage of the transformer. Electrical designs shall include

design analysis and transformer size calculations to be included in the

basis of design and summary of electrical load calculations. Station Class

Power transformers shall be provided with transformer monitor with

SCADA features.

2.3.1.2 Protection

2.3.1.2.1 Primary Protection - All transformers shall be provided with appropriate

primary protective devices, such as fuses, circuit breakers, interrupter

switches, and/or relays, applicable and designed according to the

transformer size.

2.3.1.2.2 Secondary Protection – should not be more than (1.25) X Secondary FLC

or as required by the NEC.

2.3.1.3 Transformer Taps (see section 2.2.1 System Voltages above) - Provide

four 2-1/2 % full capacity primary taps; two above and two below rated

primary voltage.

2.3.1.4 Pad mounted transformer windings shall be made out of copper. Station

class transformer windings shall be made out of copper or aluminum.

2.3.1.5 Transformers shall be insulated with non-PCB mineral oil or other

approved environmentally friendly insulating oil due to recycling and

disposal issues.

2.3.1.6 Submittal Requirements – Designers/Contractors shall submit the

required complete transformer specifications to the NAVFACMAR PWD

Utilities and the Project Design Engineer for review and acceptance prior

to procurement. Transformer data shall include, but not limited to the

following: winding and core materials and design, test data on insulation,

conductors, resistance, dielectric strength, and losses.

2.3.1.7 Pad Mounted Transformers

a. Maximum size – 1000kVA. Transformers rated above 1,000kVA,

serving 480/277 volt loads and above 2,500 kVA serving 480/277 volt

loads must be in a secondary unit substation configuration. On

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upstream of a transformer larger than 1,000kVA, provide pad mounted

VFI switchgear with Tri-phase control devices and complete with

features such as overload, ground and instantaneous fault protection.

The pad mounted VFI switchgear shall be selectively coordinated with

all supply side overcurrent protective devices.

b. Do not use dead front transformers if the available fault current

exceeds 10,000 amperes symmetrical.

c. Constructed of stainless steel.

d. Provide liquid (oil) level indicator.

e. For loop feed systems, provide 3 each two-position load break primary

switches with one set of primary fuses.

f. For loop feed systems supplying single phase transformers, provide

three phase primary switches.

g. For loop feed systems and cable risers, provide auto-resetting,

directional fault indicators for each phase.

h. For loop feed systems, provide cable fault indicator for each phase.

The indicator shall be installed in the out-going side of the loop elbow.

i. Provide test point for the load break elbows.

j. Provide standard fuses instead of current limiting fuses. Exception: For

pad mounted transformers connected directly to 13.8kV radial feeders,

current limiting fuses will be allowed to reduce the available fault

current. Expulsion and Current Limiting Fuse ratings shall be indicated

in the Design Plans and As-Built Drawings.

k. Provide temperature gauge. On transformers over 500KVA, provide

temperature sensor and all communications infrastructure and

integration to the SCADA front end.

l. Provide spare set of fuses.

m. All kWh metering shall be installed on the pad mounted transformer’s

concrete enclosure and not on the transformer’s metal enclosure.

n. Provide bushing mounted elbow type arresters at the end of all radials

and in normally open locations in loops. Provide arresters for all

voltage levels above 5kV.

2.3.1.8 Pole Top Transformers

a. Maximum number of transformers on a single pole shall be three. Limit

pole-mounted transformer sized as follows:

• Three phase installations – limited to three 25kVA transformers or

smaller.

• Single phase installations – limited to one 75 kVA transformer or

smaller.

b. Transformer kVA size shall be labeled on the tank; labels with a

minimum of 4” high lettering.

c. Covers shall be constructed of stainless steel.

d. Provide external tap changer.

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2.3.1.9 Provide transformer identification number on transformer enclosure.

Stencil in 4 inch high white lettering. Transformer ID label shall include the

facility or building number it is feeding, the transformer’s kVA and voltage

rating (e.g. 13.8 kV 480/277VAC)

2.3.1.10 For loop feed systems supplying single phase transformers, identify

transformer phase assignment (i.e. AB, BC, CA) and balance single phase

loads. Provide cable tags identifying phase inside of primary compartment.

2.3.2 Switchgears

2.3.2.1 Breaker Control Voltages

a. Switching Station: 125VDC trip and close

b. Remote or End-of-Line Station (small sizes on isolated areas): use

48VDC or 120VAC trip and close

2.3.2.2 Breaker Indication Lights and Controls

a. Provide the following indication light colors for primary and secondary

power breakers:

1. Green – Normally Open

2. Yellow – Open (Tripped)

3. Red – Normally Closed

b. Indication lights shall be “push-to-test,” transformer, resistor on diode

type.

c. Controls for breakers shall be compatible with existing SCADA

controls and shall be integrated into the SCADA front end. Follow

section 5.

d. Provide each draw out breaker with three position operation. The

connected position and the test/disconnect position shall be clearly

identified by an indicator on the circuit breaker front panel.

e. Provide a portable lifter rated for lifting and lowering circuit breakers

from two-high cubicles. Portable lifter shall have swivel casters in front

for ease of movement.

2.3.2.3 Lightning Arrestors – shall be metal oxide varistor (MOV) type.

2.3.2.4 Busing - Primary and secondary bus shall be copper, fully insulated.

2.3.2.5 Insulators

a. Primary switchgears installed outdoors shall have insulators made of

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porcelain due to Guam environment.

b. Primary switchgears installed indoors shall have insulators made of

porcelain or approved polymer material.

2.3.2.6 Provide bus bar connection from primary switchgear bus to any required

Potential Transformers instead of cable connection due to higher

probability of failure for cable connections.

2.3.2.7 Cable entry into switchgear shall be sealed to prevent rodent entry. All

spare conduit entry into switchgear shall be capped. All entry into

switchgear from manholes shall be sealed in the manhole, including ducts

with cables.

2.3.2.8 Primary Pad Mounted Switches:

a. Provide vacuum bottle technology with appropriate vacuum fault

protection switch. Fault protection relay shall be SCADA ready. Air-

insulated switch is prohibited for corrosive or coastal environment. The

number of switch-ways will be in accordance with the appropriate

design application (depending on the intended system configuration, a

3-way, 4-way, 5-way or at times 6-way switch may be required.

b. Provide key interlock for dual feed system.

c. Require cable fault indicators at switch. The indicators shall be

installed in the out-going side of the loop elbow.

d. Provide type 304L or 316 factory-painted stainless steel enclosure.

e. Provide temporary grounding sets.

f. Switch shall be installed on concrete pad. Seal around opening

between bottom of the switch and concrete pad with sealant or

caulking to resist water, sunlight, and oils.

g. Provide VFI protection device equipped with programmable tri-phase

with ground-trip electronic control logic, relay action indicator or

detector, and port for laptop connection. The device shall be capable of

storing fault events log data. Provide applicable software.

h. Provide high fire point liquid insulation and vacuum bottle interruption,

dead front with stainless steel tanks and operator full size viewing

windows for each way, three position (On/Off/Ground).

i. Provide NEMA ground pad (welded to tank).

2.3.3 Relaying

Provide relaying protections in accordance with the specified guidelines,

standards, and specifications.

2.3.3.1 CT Type - Provide separate CT's for metering (metering accuracy) and

relaying (relaying accuracy).

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2.3.3.2 Installation

a. Meters and relays shall be mounted no lower than 2'-0" from the

bottom of device to floor and no higher than 6'-0" from the top of device

to floor.

b. Meters shall follow section 2.3.4 Metering.

2.3.3.3 Relays shall be microprocessor-based multi-function, programmable type,

capable of communicating directly with the SCADA system, unless

otherwise specified by NAVFACMAR PWD Utilities. If relays being

provided do not already exist in the NFM PWD System, maintenance

instruction/documentation, programmable software, and test instrument

shall be furnished and included as part of the project. Coordinate with

NFM UEM concerning any additional microprocessor-based relay features

or functions available to the device that shall be enabled or activated.

2.3.4 Metering

For each facility or structure that is connected to the NAVFAC Marianas

electrical distribution system, provide a kilowatt-hour and demand meter.

Meters are owned and maintained as a functional part of the electrical

distribution system, as well as the enclosures, switches, cabling, and other

accessories that are critical to meter operation. Low voltage secondary

cables and pathways are owned and maintained as an inherent part of the

facility.

2.3.4.1 The NAVFAC Marianas Advanced Metering Infrastructure (AMI) system is

the required system for utility revenue meters to connect to. The AMI

system uses Modbus/TCP over Cat6 Ethernet and single mode fiber to

network all meters back to centralized servers. New utility revenue meters

are required to be AMI meters, and shall be compatible, programmed, and

integrated with the AMI system in conformance to the AMI system

architecture. All projects that will provide a new AMI meter shall include

the following as part of planning, design, and construction:

a. Installation of new or upgraded OSP fiber optic cable infrastructure

from the nearest NCTS wire center to the facility or structure that is

being metered, as needed, to ensure at least two pairs of single mode

fiber are available for use.

b. Installation of new or upgraded fiber optic cable termination panel,

network switch, enclosure, intrusion detection relay and lock, and

mounting pedestal, at the facility or structure that is being metered, as

needed, to ensure conformance to the AMI system architecture.

c. Installation of new or upgraded AMI meter socket and enclosure,

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intrusion detection relay and lock, network cabling and drops, and

electrical circuit (must homerun to a point upstream of the electrical

meter), as needed, to ensure conformance to the AMI system

architecture.

d. Installation and commissioning of AMI meter, accessories, and all

other AMI equipment, to also include submission of a change request

form, cybersecurity commissioning as outlined in Section 5, delivery of

AMI system inventory and network diagram documentation updates,

and meter changeover documentation required by the NAVFAC

Marianas UEM billing group. Provide wiring with ring lugs for all meter

connections.

Meters shall be socket-type, ANSI class 0.2 or better, and able to

communicate via an optical interface and Modbus/TCP over Ethernet.

Meters shall have at least 32MB of non-volatile memory and shall be

capable of automatically recording consumption data over time using a

configurable time interval (standard setting will be 15-minute interval).

Meters shall have Modbus mastering capability, and shall be capable of

querying water meter RTUs via the network and storing water

consumption and peak flow data over time using a configurable time

interval (standard setting will be 1-hour interval). Meters shall be capable

of measuring delivered kWh energy (delivered, received, net) and

delivered kW demand (instantaneous, cumulative, peak), kVARh/kVAR,

kVAh/kVA, PF (min, instantaneous, average), harmonic measurements

(%THD voltage and current), voltage quality measurements (sags, swells,

imbalances), and shall be capable of detecting and recording events for

the conditions of voltage sags and swells, low power factor, high

harmonics, high neutral current, hardware/memory failure, low battery,

and wiring errors (e.g. reverse rotation on any phase). Meters shall also

be equipped with digital input and output capability (e.g. KYZ pulse, relay).

Meter data and programming shall conform to the latest “AMI to MDM Call

for Consistency” document and shall be programmed and integrated to be

capable of automated remote reading. Submit a request for NAVFAC

Marianas UEM to provide Device ID, Meter Point ID, and IP

address/subnet mask/default gateway, prior to programming/configuration.

Request must include project name, work description, ready-for-

construction (RFC) site plan and one-line schematic.

Meter enclosures (and enclosures for associated equipment) shall be

located on the facility exterior wherever possible, in a location that will

ensure that utility personnel are able to freely access utility meters and

their respective enclosures. If a suitable wall is not available for mounting

AMI equipment, a reinforced concrete utility pedestal shall be provided to

mount all necessary AMI equipment. Provide reinforced concrete bollards

to prevent vehicle damage to AMI equipment if it is located such that it is

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susceptible to damage caused by vehicle traffic, but do not place bollards

in such a way that access to the enclosures and equipment is limited. All

enclosures shall be capable of being secured via padlock, and shall be

rated NEMA 4X stainless steel grade 316 or better, except that socket

enclosures are permitted to be NEMA 3R stainless steel grade 304. Equip

enclosures with molybdenum alloy stainless steel padlocks, common

keyed to match existing. Provide surge protection devices and grounding

as needed to protect AMI devices, accessories, and communications

pathways. Provide a door sensor on the interior of each enclosure, to be

wired as a digital input for intrusion detection purposes.

Provide test switches (ten-pole blocks) equipped with shorting bars (to

prevent “open secondary” for current transformers), to enable technicians

to remove the meter from the circuit for testing/maintenance purposes

without effecting an outage. Provide wiring and cabling that is color coded

in accordance with the latest applicable UFGS for electrical metering (26

27 14.00 20 at the time of this writing). Wiring must also be

marked/labeled at both ends, in a way that is easily correlated with project

record drawings. All wiring shall be performed in a professional manner

with wire bundled and supported.

Coordinate all meter installations with the BOSC. The installer and the

BOSC shall ensure that meter changeover information is properly

documented at the time of any meters being changed out, using a form to

be provided by NAVFAC Marianas UEM. Facility owner/activity must be

identified properly on the form to ensure recording for billing purposes.

Electrical metering characteristics after the changeover shall be verified to

determine if any possible wiring errors or equipment malfunctions have

occurred and (if any) shall be resolved at the time of the changeover.

Provide complete manufacturer documentation including installation,

maintenance, testing, and user manuals. Manufacturer documentation

shall also be provided for all other provided devices, accessories, and

software.

If provided meter is not directly supported by the manufacturer for the

existing AMI system front-end software (Schneider Electric ION

Enterprise), provide software drivers that will enable the AMI system

software to remotely interface with the provided meters, and to

automatically retrieve meter data. Software drivers shall become property

of the Navy, or shall be licensed to the Navy for unlimited utilization within

the Navy. Turn over the source code and original files for all scripts,

drivers, and/or configuration files that are created for the fulfillment of the

project, and the Navy shall retain full ownership and all rights for such

documents. AMI system access requirements and restrictions for

personnel performing software integration work are given in Section 5.

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Requirements for network devices and pathways are given in Section 5.

2.3.4.2 CT Type

a. Provide separate solid core CT's for metering (metering accuracy, +/-

0.3% or better) and relaying (relaying accuracy). Split core CT is not

acceptable.

2.3.4.3 Installation

a. Meter base shall be mounted approximately 4’-0” from the floor.

Switchboard type meters shall be mounted no lower than 2'-0" from the

bottom of device to floor and no higher than 6'-0" from the top of device

to floor.

2.3.5 Cables

2.3.5.1 Splicing Method and Material Restrictions

a. For heat-shrinkable joints: Do not use this method in an oil-

contaminated manhole.

b. Primary cable splices shall be made only in electrical manhole not

handhole.

2.3.5.2 Size

a. 500 kcmil copper: Distribution.

b. EPR, 15 kV, 133% UGN application, 5 mil, 25% overlap tape shield.

c. Single conductor

d. Provide counterpoise ground wire with all underground installations.

e. Provide complete grounding system in all underground electrical

structure installations.

2.3.5.3 Installation in Manholes

a. Do not install more than 8 primary cables in one manhole.

b. Recommend do not install more than 2 circuits in one manhole.

c. Do not completely loop primary cables in congested manholes.

Provide sufficient slack in cables for 1 set of splices.

d. Provide phenolic cable nameplates/tags (1/16” thick) secured by nylon

tie wrap for primary and secondary cables. Nameplates shall be

engraved with yellow background and black letters (1” high). Cable

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tags shall include the circuit ID number, system voltage, phase, cable

size, “from” where it originates and “to” where the cable goes.

e. Underground conduits shall be a minimum of 6” along main run

between underground structures (for Air Force, conduits may be a

minimum of 5”).

f. Ductbanks shall be reinforced for seismic conditions.

g. There shall be no separate splices, Bolted-T connections or load

junction in a primary electrical manhole.

2.3.5.4 Sectionalizing Termination Cabinet (STC)

a. Provide STC instead of separable (Y or Bolted-T) splices.

b. Provide pad-mounted, dead-front sectionalizing termination cabinets,

600 Amps, 3 phase, 15kV, 600 Amps dead-break/200 Amps load-

break bushings, 95kV BIL in IEEE C57.12.28 compliant stainless steel

enclosures. Provide high profile sectionalizing termination cabinets

when the conductor size is larger than 4/0 AWG to meet the cable

bending radius requirement. Install fault indicators on all outgoing

circuit feeds.

c. The STC’s bushing center point shall be at a minimum height of its

concrete pad finished grade. Low profile STC is not recommended.

d. Provide cable fault locator to each phase of the outgoing (lateral)

cables.

e. New fault indicators shall be intended for underground application trip

level selection with auto adjusting, fault sensing range from 50 to

1200A, and minimum operating current of 3A. Provide battery powered

fault indicator for lines with less than 3A load current. Self-powered

fault indicators shall be provided for all main feeders and battery

powered fault indicators shall be provided for branch lines to

transformers.

f. Provide tags for all underground cables in all accessible locations such

as in manholes, transformers, switchgear and sectionalizing

termination cabinet.

2.3.6 Substations (End-of-Line).

Provide complete grounding system in all underground electrical structure

installations.

2.3.6.1 For new stations, provide 2 incoming primary circuits with individual

overcurrent protection.

2.3.6.2 Always provide CLF's for fused primary switches.

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2.3.6.3 New Substation Buildings

a. At a minimum, provide 4" C to nearest MH for future telephone,

SCADA requirements, unless otherwise specified in the project

specifications. Provide communications pathway to the SCADA front

end. New substation control systems shall follow section 5.

b. Provide door hasp for substation security; NAVFACMAR PWD Utilities

will furnish its own padlock.

c. Provide double doors for all entry points.

d. Provide primary and secondary power cable trench from point of

substation entry and between primary switchgear, transformer and

secondary switchgear. This will allow installation and replacement of

cables with less effort. Cables in trench shall be fireproofed and

supported.

2.3.6.4 For outdoor substations with separate primary switchgear install a cable

(instead of bus) connection between the transformer and primary

switchgear.

2.3.6.5 Secondary Main Breaker Section:

a. Require an individual breaker section, separate from secondary

switchboard, to be provided. The purpose of the section is to establish

a demarcation point to identify the ownership between NAVFACMAR

PWD Utilities and customer.

b. Require a draw out type breaker with solid-state trip device.

2.3.7 SCADA

2.3.7.1 When adding new SCADA components, the new components shall be

compatible with and integrated for operation under the existing Navy

Electrical System SCADA system. New remote SCADA components shall

connect and be integrated to the central control station front end. The

communication medium shall be fiber unless a waiver is received from

Utilities. Communications and requirements for cybersecurity shall follow

section 5. At a minimum, monitoring points shall include frequency,

voltage, current, power, power factor, intrusion detection, and breaker

status. Logging of these point’s values shall occur at a minimum of 15

minute intervals. Control shall allow operation to open and close breakers

remotely from the front end.

Contractor integrating new remote with existing master shall have the

following (or equal) qualifications:

a. Certified by master station software vendors as “qualified” via

attendance in formal training classes, etc.

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b. Minimum 3 years of experience integrating specific remote equipment

(RTU, Automation Controller, etc.) with existing master.

It is not acceptable for the Contractor to claim a status of “qualified” by

taking master station software training classes after contract award.

The project shall include the following general requirements:

a. On-site training for Engineers and O&M personnel.

b. Factory training if necessary.

c. Site specific documentation (schematics, wiring diagrams, training

documentation, user & troubleshooting manuals, etc.).

d. Configuration of master to remotely monitor/control new remote points

and historize as necessary.

e. Creation of new remote station one-line diagrams and reports in

master station HMI as necessary.

f. Site Acceptance Testing (SAT) and Factory Acceptance Testing (FAT),

if deemed necessary.

g. New remote equipment (RTU, Automation Controller, etc.) shall have

at least 50% expansion capability fir additional points.

h. New equipment spare parts.

When providing and integrating Intelligent Electronic devices (IEDs),

include the following:

a. Logic diagrams with accompanying narratives.

b. IEDs configuration files.

c. IEDs Front Panel Faceplate display in master station HMI for each

IED. This IED HMI faceplate shall display the correct status (ON/OFF)

of each IED Target LED.

2.3.8 Manholes/Handholes

2.3.8.1 For new manholes/handholes:

a. Provide a manhole cover with the word “ELECTRIC” stamped in the

center. Bond manhole cover with a minimum 6 AWG conductor to the

manhole ground loop.

b. Prevent surface water entry by elevating entry opening above

surrounding terrain except in sidewalks. Manholes/handholes are not

allowed in roadway areas. Underground electrical lines shall not be

designed within the roadway areas unless the electrical line’s crossing

is required for tie-in and/or completing the design for the service area.

c. Coat exterior walls to prevent infiltration of liquids such as water and

oil.

d. Provide closed sump if located below sea level or in liquid (water, oil,

etc.) saturated soil. Otherwise, provide open sump.

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e. Seal all ducts entering manhole/handhole.

2.3.8.2 For new manholes/handholes, provide:

a. An identification number embedded on the manhole rim on at least four

different locations.

b. Manholes, sized accordingly to provide adequate space for personnel,

cables and future requirements. Minimum size of manhole shall be in

accordance with applicable UFC standards, unless otherwise specified

in the contract specifications or by NAVFACMAR PWD Utilities.

2.3.8.3 For new handholes, provide concrete covers to prevent unauthorized

access. For medium voltage handholes with concrete cover, provide ID

labels engraved onto the concrete frame or concrete cover. Minimum size

of handhole shall be of 4’ x 4’ x 6’; unless otherwise specified by

NAVFACMAR PWD Utilities.

2.3.9 Overhead Distribution Systems

2.3.9.1 Fuse cutouts shall be load break cutouts and made of porcelain material.

2.3.9.2 Do not connect to existing primary overhead lines using a mid-span tap

and slack span for the following reasons:

a. Lower strength of connection, especially during poor weather

conditions.

b. Our shops normally do not stock the connectors for mid-span taps.

c. A higher probability that the primary line must be de-energized for

maintenance and repair due to the slack span.

2.3.9.3 Minimum size of new primary lines shall be #2 (solid).

2.3.9.4 Poles shall withstand the 180 MPH wind speed and loading criteria.

2.3.9.5 Minimum diameter for pole ground rod shall be 3/4” diameter X 10’ length

and made of copper clad steel.

2.3.10 Miscellaneous Equipment

2.3.10.1 Heaters

a. Heater for primary and secondary switchgear is required.

b. Heaters must be operational after the switchgear is installed, before

and during commissioning. Heaters shall have thermostatic control and

shall have automatic control features.

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2.3.10.2 When retrofitting existing equipment, the design shall provide the

nameplate data.

2.3.10.3 Installation of Equipment Not Owned by NAVFACMAR PWD Utilities.

Equipment not owned by NAVFACMAR PWD Utilities shall not be located

in, attached to or consuming electrical power from NAVFACMAR PWD

Utilities electrical facilities (substations, switching stations, etc.). If this is

not possible the owner of the equipment shall submit a written request to

NAVFACMAR PWD Utilities explaining why alternative equipment location

is not possible. If the request is approved:

a. The equipment shall be tagged clearly identifying the owner.

b. NAVFACMAR PWD Utilities reserves the right to remove or relocate

the equipment

c. We may require the installation of a kWh meter for electrical billing

purposes.

d. If electrical service is supplied from a panel board in the facility, the

equipment owner will have to depend on NAVFACMAR PWD Utilities

forces to allow access into the facility for resetting the panel board

circuit breaker, etc.

2.4 SPECIFICATIONS

2.4.1 Equipment, Spare Parts & Special Tools

2.4.1.1 All equipment containing dielectric fluid shall be accompanied by the

manufacturer's certification that the equipment contains no detectable

PCB's or that the PCB level is less than 1 PPM, IAW OPNAVINST

5090.1A (Environmental Natural Resources Program Manual) dtd 2 Oct

90.

2.4.1.2 Provide spare parts and special tools for equipment to be provided under

contract - fuses, circuit breaker test set, tools, protection relay test kit, etc.

2.4.2 Relays

2.4.2.1 Testing

a. Relay Wiring Testing: Testing and verification of CT ratio and polarity

and relay operation shall be done by primary current injection.

b. Differential protective relaying circuits shall be tested under load in

addition to the primary current injection testing.

2.4.2.2 Time-Current Curves: Submit original manufacturer's published time-

current curves of transformer fuses, secondary breakers, relays, etc. for

application of relay settings.

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2.4.3 Switching

Only the BOSC Utilities Electrical Power Distribution personnel are

authorized to perform switching. Do not use the term "de-energize".

2.4.4 High Voltage Cables

2.4.4.1 Hi-Pot Testing

a. Conduct the tests in three phases: 1) For the existing conductors,

2) For the new conductors after installation, splices and

terminators/connectors and before terminating to equipment or splicing

to existing conductors, 3) For any of the combined new and existing

conductors or new terminators/connectors and existing conductors.

b. New Cables: Perform field acceptance tests on new cables in

accordance with ANSI/NETA ATS and IEEE 400.2. Tests must be

shield continuity test, insulation resistance test and very low frequency

(VLF) alternating voltage withstand test/Hi-Pot for a duration of 60

minutes using a sinusoidal waveform.

c. Existing Cables/Existing cables connected to new connector,

terminator and or new cables: Perform field maintenance tests on

combined existing cables, new connector, terminator and or new

cables in accordance with ANSI/NETA MTS and IEEE 400.2. Tests

must be insulation resistance test and very low frequency (VLF)

alternating voltage withstand test/Hi-Pot for a duration of 30 minutes

using a sinusoidal waveform.

d. Furnish a copy of Hi pot test report certified and signed by the

Contractor and DOR to NAVFACMAR PWD Utilities for review and

comments upon completion of testing.

e. Label all medium voltage cables – Tags or labels shall include the

voltage rating, phase size of cable, circuit identification, and “to” and

“from” information. Cable tags shall be in conformance with UFC and

UFGS criteria.

2.4.5 Outages

2.4.5.1 Electrical outages shall be requested in writing in accordance with the

contract requirements.

2.4.5.2 Electric Power Generator support for scheduled electrical outages on

critical facilities (including housing) due to construction contract work shall

be provided by the Contractor.

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2.4.6 Pier (Shore) Power Outlet Assemblies and Cables

2.4.6.1 Insulation resistance readings for 600 volt class shore power cables shall

not be less than 100 mega ohms.

2.4.6.2 Single conductor, 600A pier receptacles shall meet standard configuration.

2.4.6.3 Each pier receptacle shall be 400A minimum load tested as a complete

system for a period of not less than 4 hours. NAVFACMAR PWD will not

provide the load bank to load test the pier receptacles. Power required to

load test shall be charged to the Contractor.

2.4.7 Conductors

2.4.7.1 All conductors (primary and secondary) including equipment buses,

transformer windings, etc. shall be made of copper subject to UFC 3-550-

01 Par 3-11.1 restrictions.

2.4.8 Asbestos, Other Environmental Hazards and Personnel Safety

2.4.8.1 NAVFACMAR PWD Utilities has information on the removal of asbestos

fireproofing on primary cables in manholes. However, the designer is still

required to field verify conditions.

2.4.8.2 NAVFACMAR PWD Utilities is not responsible for ensuring a safe working

environment in manholes. Therefore, NFM is not responsible for testing for

and removing asbestos, water, oil and oily water from manholes in support

of a construction contract. Provide dewatering in accordance with

approved waste water disposal plan.

2.4.8.3 All Contractors shall coordinate entry into manholes and substations with

BOS Contractor via the Contracting Officer for the project. Cost associated

with the support of the BOS Contractor shall be charged to the

Construction Contractor.

2.4.9 Equipment Operation and Maintenance Manuals

2.4.9.1 NAVFACMAR PWD Utilities requires a minimum of three bound manuals

and one digital version for new equipment. If new equipment is to be

installed at multiple substations/locations, then the manuals shall be

separated and identified by substation/location.

2.4.9.2 Submit the O&M manuals to NAVFACMAR PWD Utilities prior to start of

acceptance (walk thru) inspection.

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2.4.10 Prevention of Damage to Underground Utilities

2.4.10.1 Although clearances are issued by the BOSC, toning prior to any

excavation is highly recommended. Contractor shall refrain from utilizing

mechanized heavy equipment when excavating near known underground

utility lines. Excavation should be performed by means of hand-held tools

(e.g., shovel and pick) or small power tools. When hand-held power tools

are utilized, extreme care must be practiced to avoid causing damage to

any existing underground utility lines.

2.4.11 Emergency Eyewash Equipment

2.4.11.1 Emergency eyewash equipment shall conform to ANSI Z358.1 (Plumbed

and Self-Contained Eyewash).

2.4.12 Warning Signs

2.4.12.1 Provide warning signs for new substations with equipment ratings that

exceed 600 volts as required by ANSI Z35.1. Metal signs with the legend

“DANGER HIGH VOLTAGE KEEP OUT” shall be provided in three lines of

nominal 3-inch high letters and installed on the exterior walls (front, sides

and rear) of the pad mounted equipment concrete enclosure.

2.4.13 Energization

Field test of all equipment (transformer, switchgears, cables, and other

testing requirements results) shall be performed in accordance with the

contract specifications. Contractors and Electrical Designer of Record

shall certify and sign the test results and provide to NAVFACMAR PWD

Utilities and the Project Design Engineer for review and acceptance.

Copy of test results shall be provided to BOSC for review prior to

energization date.

Field inspection to the new electrical equipment and any existing

equipment affected by the construction work shall be performed prior to

energization. PWD UEM/BOSC Utilities Engineering shall be informed in

advance concerning any scheduled electrical utility inspection.

2.5 SYSTEM ADEQUACY

2.5.1 Contractor/Designer’s Responsibility

It is the Contractor/Designer's responsibility to evaluate & ensure that the

existing electrical system can accommodate any proposed increase in

load. If the existing electrical system cannot accommodate the proposed

increase, Contractor/Designer shall include in the design any necessary

upgrades to accommodate the increase in load. Cost of upgrades shall be

funded by the proposed project. Coordinate with NAVFACMAR UEM.

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2.5.2 System Coordination & Design Analysis

System coordination study and design analysis, recommended ratings,

and settings of protective devices shall be accomplished by a registered

professional electrical engineer with a minimum of 5 years of current

experience in the coordination of electrical power systems. The complexity

and extent of the study is dependent on the work required (e.g. type and

load of facility addition, reconfiguration or replacement of utility

infrastructure, etc.). It is the Contractor/Designer's responsibility to ensure

that the protective devices specified for any project coordinate properly

with any existing upstream/downstream protective devices.

2.6 DUCT ASSIGNMENT

2.6.1 The identifying, routing and assignment of ducts will be the Design

Engineer's responsibility.

2.6.2 NAVFACMAR PWD Utilities requirements are summarized below:

a. Verifying the existence and serviceability of existing ducts is the

responsibility of the requesting party.

b. The last spare duct in each duct section is reserved for emergencies,

and therefore is not available for use.

2.7 TELECOMMUNICATION (INCLUDING TELEPHONE, CATV, AND

FIBER OPTIC CABLES)

Designers/Contractors shall coordinate design and construction with the

respective telecommunication owners, unless otherwise specified in the

projects’ specifications.

Designers/Contractors shall provide the necessary ducts and fiber optic

cables/connections for the appropriate Industrial Control System (e.g.

DDC, SCADA, AMI) required to be installed and shall follow section 5.

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CHAPTER 3 - SEWER

3.1 GENERAL INFORMATION.

This section covers general information for sewer facilities including

wastewater distribution and lift station systems, as applicable.

3.1.1 Subsurface Oil.

When performing excavations in areas where oil may be encountered,

include appropriate construction/contract provisions to address the

handling and disposal of the oil as necessary and to prevent the inflow of

this ground oil into the sewer collection system from construction activities.

3.1.2 Existing Underground Utility Lines.

Plans and specifications shall require the toning of any area to be

excavated for underground utility lines. In areas where non-metallic pipe

lines may be present, ultrasonic detection methods or field-locating grade

nodes (manholes, cleanouts) may be used as appropriate. Gravity sewer

alignments and depths can generally be determined from open

inspections of existing grade provisions (manholes and cleanouts).

Ground Penetrating Radar (GPR) systems shall be used prior to

excavation in all Shipyard areas. Research “as-built” construction

drawings, and perform field investigations, to ensure that all known

underground utility lines are identified on the construction drawings prior to

actual field excavations. Perform soil borings sampling and testing when

required. Include a note and/or specification to indicate the cost of

repairing any damaged underground utility line shall be borne by the

Contractor regardless of whether or not the utility lines are depicted on the

construction drawings.

3.1.3 Diversion of Sewage/Spills.

Plans and specifications shall require the Contractor to be responsible for

diverting sewage as necessary for performance of work. The Government

will not perform sewage diversion operations for the Contractor however

will provide an end point for sewer disposal. The Contractor shall supply

all labor and equipment necessary to compliantly perform his operations

which may include the use of bypass pumps, tank trucks, temporary

piping/hoses, etc. The Contractor will also be responsible for any sewage

spills and regulatory fines resulting from construction operations. See

section 3.1.7 for outages.

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3.1.4 Temporary Connections for Contractor Trailers.

Any Contractor requiring a temporary sewer connection shall submit a

request to perform work on the Navy’s sewerage system with plans or

sketches to NAVFACMAR BOSC for review and approval prior to making

the connection (see section 3.5.1). The Contractor is responsible for

metering utility consumption for billing purposes. The submittal should be

made through the Contracting Officer or facilities Project Manager as

appropriate. Upon completion of the work, the Contractor shall terminate

the connection as prescribed by NAVFACMAR BOSC. Onsite

Government inspection may be required. Abandoned temporary

connections with open cleanouts are not allowed.

3.1.5 Dewatering into the Sewer Collection System.

Construction dewatering into the Navy’s sewer collection system is not

permitted. Batch discharges of other types of wastewater into the Navy’s

sewer collection system require case by case approval by NAVFACMAR

EV. Discharges of hydro-test water, dechlorinated water from pipe line

disinfection and flush water from storm drain cleaning is not permitted into

the Navy’s wastewater collection system. These are considered to be non-

industrial wastewaters that can be disposed of by means other than by

discharge into the domestic sewer collection system.

3.1.6 Construction Notes.

Construction drawings should include pertinent project-specific sewer

notes or construction notes to clarify or bring attention to certain

construction requirements that directly or indirectly affect the Navy’s sewer

collection/transmission systems and those who work on these systems.

Some of the following sewer notes may apply to typical sewer construction

work. The designer may choose to modify these notes and/or provide

other project-specific notes as deemed applicable to the scope of work.

a. The Contractor shall be responsible for performing and maintaining

any incidental sewage bypass pumping or diversion work that will be

required to accomplish the construction work.

b. For any new concrete surface that will be exposed to sewage flow, the

Contractor shall maintain sewage bypass/diversion operations for the

duration of the specified curing time for the concrete.

c. The Contractor shall be responsible for providing and maintaining

temporary power as necessary to maintain normal lift station

operations.

d. The Contractor shall be responsible for damage to any Government

utility system resulting from construction operations; any damage shall

be reported immediately to the Contracting Officer or appropriate

Government Representative. Any sewer repair performed by the

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Contractor shall be inspected by the NAVFACMAR PWD Utilities via

the Contracting Officer’s representative prior to backfilling.

e. The Contractor will be responsible for regulatory fines or penalties that

may be imposed by environmental regulatory agencies (NAVFACMAR

EV and/or EPA) in the event of sewage overflow or spill resulting from

construction operations.

f. The Contractor shall reimburse the Government for any emergency

response effort that may be required by Government forces to mitigate

the adverse effects of any sewage overflow or spill resulting from the

Contractor’s operations.

g. Any sewer manhole to be abandoned shall have its cone section

removed and disposed of, pipe penetrations plugged with Class “C”

concrete and the remaining riser structure backfilled and compacted to

finish grade.

h. Cleanouts on any abandoned service lateral shall be plugged and

terminated a minimum of 12 inches below finish grade.

i. Prior to abandonment, pipe shall be filled with flowable fill as noted.

j. The Contractor shall contact NAVFACMAR BOSC Wastewater

Manager (phone: 339-1794) via the Contracting Officer’s

representative to make arrangements for the Government to take

custody of salvageable sewer manhole frames and covers. Manhole

frames and covers not accepted by the Government shall be disposed

of by the Contractor.

k. When working on dockside or under pier ship wastewater collection

system piping, the Contractor shall first mechanically secure and tag

out hose connections along the entire length of the common pressure

manifold prior to working on the system.

l. Potentially lethal levels of hydrogen sulfide (H2S) gas may develop in

the gravity sewer collection system.

m. The Contractor shall ensure that loose material, tools and equipment

from construction operations are appropriately removed from the sewer

collection system. Any damage to downstream lift station equipment

resulting from negligence will be assessed to the Contractor.

n. Prior to securing potable water outages in mains or service

connections, the Contractor shall first provide and maintain a backup

seal water provision to lubricate pump seals at the affected sewer lift

station shown on the plans. Coordinate access to the affected lift

station, at least 3 days in advance of the outage, with the

NAVFACMAR BOSC Wastewater Manager (phone: 339-1794) via the

Contracting Officer’s representative.

o. Adjust all manhole frames and covers to the new finish grade and

ensure the adjustments prevent surface runoff inflow. Mark all covers

as SEWER.

p. Provide 3 days advance notice to NAVFACMAR PWD Utilities via the

Contracting Officer, for joint ROICC or FEAD/NAVFACMAR PWD

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Utilities inspection of any new wye saddle construction for new service

connections to existing sewer mains.

q. During periods of non-work and for the duration of contract work within

the secured perimeter of the lift station, the Contractor is responsible

for securing access gates, doors and security. After normal working

hours, the Contractor is responsible for properly securing access

gates, doors and security fencing.

r. Upon completion of the sewer construction, make advance

arrangements (3 working days minimum), through the Contracting

Officer’s representative, with NAVFACMAR PWD Utilities

Water/Wastewater Superintendent (phone: 339-2397) for final

acceptance inspection of the new sewer construction.

s. Construction dewatering into the Navy’s sewer collection system is

prohibited.

3.1.7 Outages.

As much as possible, sewage flow shall not be interrupted. Contractor-

provided bypass measures should be incorporated into the design of the

project. When brief outages will be required at sewage lift stations for

work involving motor controls, control valves and pressure mains, the

designer should determine a reasonable outage period based on available

engineering information. The designer should also coordinate construction

requirements with the NAVFACMAR BOSC Wastewater Manager (phone:

339-1794). The ideal time for lift station outages would be during low-flow

periods, normally at midnight. The designer should, during the design

phase, discuss the details of such planned outages with the Lift Station

section Supervisor. In rare situations, Government forces may be

required to assist the Contractor by securing operational controls during

the outage period. Such Government services will be charged to a pre-

established and cost-reimbursable Contractor or project-sponsor job order

account and shall be arranged/planned in advance with the NAVFACMAR

BOSC. For lift station outages, the Contractor should also plan for and

provide standby emergency contingencies, to prevent system overflows

(Contractor’s responsibility). Contractors shall provide and maintain

interim emergency generators or portable pumping provisions to maintain

normal sewage flow as needed to perform the work.

3.1.8 Requests for Information from Government Contractors and Outside

Parties.

All requests for information on the Navy’s wastewater system by

Government Contractors and other outside parties shall be made via the

cognizant Navy Contract Administrator, Project Design Engineer,

Program/Project Manager or responsible Navy Facilities Representative

who will validate the requests against the scope of contracted services to

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ensure that only information pertinent to the scope of contracted services

is released. The Navy makes no representation that released documents

and files (e.g. record drawings, maps, reports, studies, etc.), hard copy or

otherwise, or the information they contain, are accurate, current or

complete.

3.1.9 Contractor Submittals.

Contractor submittals, as noted, shall be forwarded to NAVFACMAR PWD

UEM, via the Contracting Officer, for review and approval as applicable.

Also see Chapter 1 for project submittals.

3.1.9.1 Post-Construction CCTV Video.

Provide a post-construction video recording (DVD) of the pipe interior for

all new or replaced sewer mains (manhole-to-manhole). See section

3.2.12.5.

3.2 SEWER LINES.

This section covers requirements for new sewer installations and repairs,

as applicable.

3.2.1 General Location.

Structures (including but not limited to buildings, backflow preventers,

transformer pads, mechanical equipment and anchor walls) shall not be

built over new or existing sewer lines. As a general rule-of-thumb,

consider a 1:2 depth-to-width sewer line excavation clearance. For

structures that can transmit live loads to the foundation (e.g. – flag poles,

utility poles), a structural or soils engineer should establish the appropriate

horizontal setback distance, but in no instance shall any structure be

located closer than 3-feet from any sewer line. To the fullest extent

possible, a horizontal clearance of at least 10-feet shall be provided

between water lines and sewer lines. New sewers crossing above potable

water lines must be constructed of suitable pressure pipe or fully encased

in concrete horizontally 10 feet on each side of the crossing with a vertical

distance of 12 inches from the bottom elevation of the concrete

encasement or pressure pipe to the top elevation of the water pipe. Force

mains will have no joint closer horizontally than 3 feet to the crossing,

unless the joint is encased in concrete. The thickness of concrete

encasement will be a minimum of 4 inches at pipe joints. Depressed

sewers crossing potable water lines must be installed below the water line

with a minimum vertical clearance of 2 feet. Sewer joints will not be closer

horizontally than 3 feet to the crossing, unless the joints are fully encased

in concrete as required above. Sewerlines shall not be designed within

roadway areas unless the sewerline’s crossing is required for tie-in and/or

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completing the design for the service area.

3.2.2 Manhole and Valve Locations.

Traffic rated manholes and valve structures shall be located adjacent to

roadway areas or in serviceable vehicle corridors, especially in family

housing areas. This is to ensure that maintenance vehicles are not forced

to drive over grassed lawns or landscaped areas. Adequate clearance or

minimum of 5 feet between the edge of a building (wall and roof line) and

other structures should be provided to enable repair of the lines by use of

heavy equipment. Traffic rated manholes and valve structures shall be

required in all areas. Manholes and valve structures shall not be allowed

in roadway areas. In family housing areas, concrete and grout shall be

provided to remove trip hazards and sharp edges of manhole frames and

structures.

3.2.3 Cover.

The minimum cover for sewer lines and force mains shall be 3 feet

(sufficient cover shall be provided to protect the pipe from superimposed

surface loads in accordance with applicable UFC standards). Require the

installation of a buried warning and identification tape on all sewer lines

and installation of tracer wire over non-metallic sewer pipes.

3.2.4 Pipe Jackets.

Use reinforced concrete pipe jackets where minimum pipe cover is not

available. Use of reinforced concrete pipe jackets should also be

considered at sewer and water line crossings, where minimum horizontal

and vertical clearances between sewer and water lines cannot be

obtained. All concrete jackets shall be structurally reinforced. Concrete

jackets shall fully envelop the nearest pipe joint to ensure that no adverse

shear stresses are placed on the joint.

3.2.5 Deflections.

Maximum deflection for pipe joints shall be limited to 80% of the deflection

recommended by the manufacturer.

3.2.6 Velocity.

Flow velocities for gravity and pressure mains shall be as follows:

a. Flow velocities in gravity mains shall be within the range of 2 feet per

second to 10 feet per second. Design sewers to give mean velocities

of not less than 2 feet per second when flowing full.

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b. Flow velocities in pressure mains shall be designed to be within the

range of 3-5 feet per second to ensure adequate scouring during

diurnal peak flow periods. In order to minimize pipe friction losses,

maximum transmission velocities shall not exceed 6 feet per second

under normal operating conditions.

3.2.7 Flow.

Manning design flow calculations shall be submitted with design review

submittals. In the absence of any hydraulic assessment based on actual

measured flow data, and as a condition of allowing a service connection,

NAVFACMAR PWD Utilities may require that any facility project that

proposes to increase flow in an existing system also upgrade the size(s) of

downstream collection mains as deemed necessary to compliantly

accommodate peak design flows. This assessment is best made during

the planning stage of a project, through consultation with NAVFACMAR

PWD Utilities prior to developing project cost estimates. Generally, it is not

desirable to design sewers for full flow, even at peak rates. Therefore

trunk and interceptor sewers will be designed to flow at depths not

exceeding 90 percent of full depth; laterals and main sewers, 80 percent;

and building connections, 70 percent. This design approach will provide

sufficient air space above the liquid space to assure proper ventilation,

preventing the accumulation of explosive, corrosive or odorous gases,

reducing the generation of hydrogen sulfide, and preventing the sudden

loss of carrying capacity with surcharging at manholes. However,

regardless of flow and depth, the minimum sizes to be used are 6-inch for

building connection and 8-inch for all other sewers. Building connection

that do not carry sanitary waste and will transport liquids with little or no

solids can be smaller than 6-inch, but no smaller than 4-inch. Industrial

applications will use the same design criteria as sanitary sewers, except

pipe material that is resistant to the waste will be specified. To minimize

the propensity for pump cavitation problems and to ensure that an efficient

hydraulic transmission system is provided, provide Hazen-Williams

hydraulic system calculations to justify transmission system designs.

3.2.8 Pipe Slope.

Minimum pipe slopes for design purposes are as follows:

Diameter (inches) Min. Slope (ft/ft)

6 0.0060

8 0.0044

10 0.0032

12 0.0032

15 and larger 0.0020

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3.2.9 Pipe Bedding.

To minimize the development of concentrated stresses at pipe joints,

provide graded granular trench bedding material around the entire

circumference of all new sewer pipes. Provide a cross-sectional detail to

depict this requirement.

3.2.10 Thrust Blocks.

Particular attention and caution shall be exercised when working near

pressure main thrust blocks; the designer should include appropriate

provisions in the design to prevent the disturbance of supporting soil

around thrust blocks during construction operations. Thrust blocks for

underground pressure lines are not typically shown on as-built file

drawings. Soil buckling around thrust blocks for sewer force mains and

water mains can result in major damage to underground utilities.

3.2.11 Landscape Setback.

Trees shall not be planted closer than 20 feet, and shrubs/hedges not

closer than 5 feet from a new or existing sewer line. In exceptional

situations where landscape setback requirements cannot be met, dwarf

palm trees (such as Manila or Dwarf Date) may be planted up to 10 feet of

a sewer provided the requestor (Class 1 property owner) is able to

demonstrate that such plantings will not cause any damage to

underground utility lines (e.g. – feeder roots will not penetrate gravity

sewer pipe joints). Also, in the event excavation for future repairs to the

underground utility lines become necessary, NAVFACMAR PWD Utilities

will not fund for removal, relocation, disposal or replacement of any

affected planting. The requestor shall fund for and make any necessary

alternative arrangements with the Outdoor Circle (or any other concerned

party), as necessary, to ensure that NAVFACMAR PWD Utilities is able to

focus its limited resources in addressing wastewater mission

requirements.

3.2.12 Gravity Lines.

3.2.12.1 Cleanouts.

Cleanout assemblies shall be constructed of cast iron (no-hub) pipe with

“MG” couplings (sometimes called “portable hubs”), approved equal, or

stainless steel couplings. MG couplings are preferred to stainless steel

couplings due to its greater pull resistance and maximum joint strength.

The diameter size of all cleanouts shall be equal to the size of the

downstream pipe (e.g. A nominal 4-inch cleanout should be installed on a

4-inch lateral, a nominal 6-inch cleanout should be installed on laterals 6-

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inches and larger). With full-sized cleanouts, the proper maintenance

cleaning heads can be used to restore the pipe to its full hydraulic

capacity.

For all building sewers, including housing units, a sanitary cleanout shall

be installed 5-feet from the building line, except where private utility sales

agreements state otherwise. Additional building sewer cleanouts shall be

installed at intervals not to exceed one hundred (100) feet (30.4m) in

straight runs and at each horizontal change in direction in a sewer service

lateral.

a. MG couplings (or approved equal) shall have a cast iron housing

conforming to ASTM A-48, Class 30-A. The housing coating shall be a

bituminous material. Gaskets shall be neoprene. Bolts and nuts shall

be 18-8 stainless steel.

b. The ends of the cast iron cleanout pipe shall have an inner pipe thread

to receive either raised or countersunk brass cleanout plugs (outer

plug thread).

c. Prior to installation, the cleanout plug threads shall be greased to

facilitate subsequent removal when performing line cleaning

operations.

d. All cleanouts in grassed or landscaped areas shall be provided with an

18” square protective concrete grade collar. See section 3.5.4 for

special details.

e. The type of pipe material downstream of the cast iron cleanout

assembly shall be etched into the curing concrete grade collar (“PVC”

for Polyvinyl Chloride Pipe, “CI” for Cast Iron Pipe). This will help

maintenance personnel in determining the appropriate type of cleaning

head to use when accessing the cleanout and will be especially

beneficial when responding to emergencies at night.

3.2.12.2 Pipe Material.

Provide PVC pipe materials (other materials, such as HDPE, may be

installed only with prior approval by NAVFACMAR PWD Utilities). When

using PVC, specify SDR 35 or AWWA C-900. SDR 35 PVC pipe should

indicate that the pipe is to be laid on a “uniform straight grade”. In areas

where stiff fat clay in encountered, stiffer C-900 PVC pipe has been

effective in resisting sagging and bowing due to ground movement. C-900

PVC pipe is also available with a double-gasketed, push-on, pressure-

rated joint that is effective in controlling inflow and infiltration. For sewer

installations within or near the water table, specify this type of pipe.

However, it is preferred new sewer lines always be designed above the

ground water table. Because PVC is not ultraviolet resistant, include

appropriate provisions in the specifications requiring the Contractor to

properly protect PVC pipe staged at the job site.

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The NAVFACMAR BOSC Line Maintenance section stocks small

quantities SDR 35 and C-900 PVC pipe for emergency repairs rather than

other types of pipe. For this reason, PVC pipe should be specified for new

projects, with the class of pipe to be determined by the available

engineering data such as design pipe grades and soil characteristics

inherent to the project site.

3.2.12.3 Fittings.

The type of fittings to be specified will be determined by the type of pipe

used. Sanitary fittings shall be specified in all cases. Push-on type plastic

or PVC fittings without sanitary sweeps will not be permitted. When

specifying fittings for C-900 PVC pipe, the designer should check to

ensure that the inside diameter of the fitting corresponds to the inside

diameter of the C-900 PVC pipe specified since the inside pipe diameter is

variable in achieving the desired shell thickness (stiffness). “Lips” at

improperly specified fittings can snag solids resulting in hydraulic flow

constrictions. If no-hub cast iron pipe installation is permitted, approved

cast iron or stainless steel fittings shall be used.

3.2.12.4 Manholes.

Manholes shall be either pre-cast or cast-in-place reinforced concrete.

Details of manholes shall clearly indicate a properly formed channelized

base and shall indicate proper water-tight grouting of all pipe penetrations

and precast sections. Manholes shall be provided without rungs.

Deteriorated rungs often provide a false sense of security and pose a real

safety hazard; NAVFACMAR BOSC maintenance personnel will use

ladders to gain access to manhole confined spaces. Rungs, in general,

also interfere with current confined space entry procedures.

All influent pipe connections to manholes shall be made at the properly

channelized invert of the manhole, whether it is a direct connection or a

drop connection. “Waterfall” type connections are substandard and will

not be permitted. All pipe penetrations shall be made perpendicular to the

circumference of the manhole – angled deflections at existing flow

channels will not be permitted. Manhole frames shall be firmly

(structurally) affixed to the top of the manhole cone and grouted around

the ring of the frame. Standard-sized frames and covers shall be specified

as depicted in approved standard details. Where a large junction structure

is required, include a sufficient number of manholes on the structure to

allow full direct access to all points in the structure.

Manholes shall not be situated in sump depressions or drainage swales

where rainfall runoff can accumulate. The designer should carefully check

finish grades to ensure that this manhole-orifice situation does not occur.

The intent is to minimize direct inflow for all new manhole installations.

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In rare situations where connections are made to existing manhole

structures, where excavation for connection to the invert would encounter

subsurface oil or ground contaminant, special interior manhole drop

connections may be permitted on a case-by-case basis. Such special drop

connections would typically consist of a straight-vertical sanitary tee fitting

connection with an open-vented top; there shall be a base fitting to direct

the flow into the existing base flow channel. The drop pipe shall also be

structurally affixed to the interior wall of the manhole using stainless steel

straps and mounting hardware. See section 3.5.4 for special details.

3.2.12.5 Post-Construction CCTV Inspection.

On contracts that involve the construction of new sewer mains (manhole-

to-manhole), the replacement of sewer main pipe with new sewer pipe

(manhole-to-manhole), or for projects where subsequent heavy grade

compaction is performed after the laying of sewer collection mains, the

contract documents shall include the requirement that a post-construction

video recording of the interior of the constructed sewer main be submitted

to NAVFACMAR PWD Utilities. The video shall include a progressive

video recording of the main section using standard pipeline video

equipment. The equipment used to video-document the interior of the

main shall either be equipped with an inclinometer indicator that portrays

the slope of the main on the video recording, or the video shall be

recorded with partial flow in the main (or with a fully wetted invert) such

that an assessment can be made of the trueness of grade (workmanship).

The video shall also clearly depict all pipe joint sections along the entire

length of pipe in a continuous recording sequence. The submittal of the

video documentation shall be made a “Records” submittal requirement

and will be reviewed by NAVFACMAR PWD Utilities prior to final Navy

acceptance of any constructed wastewater provision. Past random post-

construction video inspections performed by NAVFACMAR PWD Utilities

have revealed separated pipe joints (which have the potential of evolving

into sink holes) and detrimental sags (which collect grease) in newly-

constructed sewer mains. Such deficiencies require corrective action

through rework. Despite typical grade control measures and Contractor

QC efforts, it appears that some of the damage to the new mains may

occur during trench compaction. Pipe joint separation and sags that can

occur during trench compaction operations can be minimized in a number

of ways: (1) if PVC sewer pipe is used, double-gasketed push-on joints

generally offer better shear and pull resistance over “mission” (rubber)

couplings, and they also offer better joint stiffness (less joint deflection);

(2) granular pipe support (self-compacting 3B-fine material) is provided

around the full circumference of the pipe in order to minimize pipe

movement during compaction.

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3.2.13 Pressure Mains.

3.2.13.1 Pipe Material.

Sewer pressure mains shall be PVC C900/C905 heat fusion joint, or push-

on joints w/ mechanical restraints or ductile iron with 316 stainless steel

nuts and bolts unless otherwise approved by the NAVFACMAR PWD

Utilities. In some situations, the use of high-density polyethylene (HDPE)

pipe may be permitted provided thermal expansion factors are considered

in the design. All ductile iron pipes without cathodic protection systems

shall be installed with polyethylene encasement. If non-metallic pipe is

approved for use, require that tracer wire be provided in addition to buried

warning and identification tape. Specifications shall require that all

pressure mains be leak-tested prior to final acceptance.

3.2.13.2 Air Release Valves.

Appropriate air release provisions shall be installed at all high points in the

pressure main where air can accumulate. Air release valves specified

shall be designed specifically for sewage applications and all interior

mechanical components shall be fabricated of stainless steel. Valves with

plastic components are not acceptable.

3.2.13.3 Pressure Cleanouts.

If isolation valves are installed in a pressure main, install pressure

cleanouts immediately downstream of the isolation valve. On long

pressure main runs, this would permit damaged sections of the pressure

main to be bypassed for repairs. Viton-gasketed stainless steel pressure

blank covers, or approved equal, shall be installed such that the cleanout

flange face is parallel to the finish grade, 12-inches below grade and

within a manhole structure.

3.2.13.4 Dock-side Ship Wastewater Collection System.

Dock-side ship wastewater collection systems normally consist of dock-

side hose connections to under-pier pressure manifold piping.

Occasionally, control valves are installed in the manifold pressure piping

to pressure-isolate sections of the collection manifold. Such control valves

are normally located in valve pits which are accessible from the deck.

Ensure that dock-side control valves are easily and safely accessible for

servicing and maintenance. Occasionally, check valves become clogged

and removal is required for servicing. These valves shall be located to

facilitate easy removal. If grates are utilized to secure deck-side valve pits,

ensure that these grates are easily removable by a single worker. Also

ensure that all nuts and bolts are easily accessible for removal of the

valve. Access to all valves shall be provided from the deck, and

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structurally sound working platforms shall be provided as necessary.

a. Specify flanged-end valves with 316 stainless steel nuts and bolts--

galvanized or zinc-coated steel nuts and bolts will not be accepted.

b. Wherever possible, pinch valves shall be specified in lieu of plug

valves. Pinch valves require minimum maintenance and are proven to

be more cost effective than plug valves. If the use of pinch valves is

allowed, the designer shall verify that the pinch valve is able to meet

the discharge pressures anticipated at the collection manifold from all

types of ships that discharge CHT at the serviced berth(s).

c. Under pier pipe hangers and other structural support provisions,

including hanger rods and nuts/bolts, shall be 316 stainless steel.

Locking nuts shall be provided for all pipe-support saddle assemblies

and on all threaded hanger rods.

d. Standard 4” dockside CHT hose risers are terminated with a female

cam-lock fitting (bronze to bronze flange) with a male cam-lock plug

(bronze) that is affixed to the riser assembly with a corrosion-resistant

chain. Provide a pressure isolation valve on each hose riser. On a

case-by-case basis, consult with NAVFACMAR BOSC Port Operations

for specifics regarding design and construction of CHT hose riser

assemblies.

3.2.13.5 Transition Manhole (Pressure Sewer to Gravity Sewer)

Manholes must be placed where pressure sewer connect to gravity main

line after the point at which the pressure line is in laminar non pressurized

flow. The pressure line must enter the manhole at laminar flow and

discharge into a channel in a Y-configuration in the direction of the gravity

flow at the gravity invert elevation.

3.3 LIFT STATIONS.

This section covers requirements for lift stations systems.

3.3.1 Equipment.

In the design of a lift station system, the designer should provide the

drawings a narrative on the sequence of operation of the equipment

including electrical interlocks, alarms, timers, etc. The rationale behind the

operation should also be provided. All equipment and major operational

components shall be affixed with a manufacturer’s nameplate data tag that

includes the make, model, serial number and factory specified operational

parameters such as amperage, voltage, frame size, frequency, etc. This

information shall also be included in the O&M Manuals provided to the

Government. Equipment located inside wetwell spaces shall be explosion

proof. Provide digital controller and integration into the SCADA system per

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section 3.3.15.

3.3.2 Electrical Wiring Diagram.

A copy of the station’s electrical wiring diagram which depicts all breakers,

relays, controls, switches, etc. shall be included in the final O&M manual.

A laminated copy is also to be posted in a conspicuous location at the lift

station as approved by the Contracting Officer.

3.3.3 Operation and Maintenance (O&M) Manuals.

For each operational sub-system, the Contractor shall provide manuals

that are tailored to each individual component of the sub-system. The

Contractor shall utilize specific information from the design drawings and

equipment operating manuals to assemble the lift station O&M manuals

that describe in detail the sequence of operation and the relationship

between each component in the overall operation of each sub-system.

Detailed preventive maintenance schedules and procedures shall also be

included in this manual. The O&M manuals shall also include the

manufacturer’s factory-certified pump curves if new pumps are installed as

part of the project. Of the total numbers of sets of O&M manuals that are

to be provided by the Contractor, three (3) sets shall be provided to the

NAVFACMAR BOSC Wastewater Manager (phone: 339-1794) via the

Construction Management Engineer (CME) prior to the final acceptance

inspection of the work.

3.3.4 Posting of Instructions/Diagrams.

For new and/or modified equipment such as generators, process

equipment, pumps, valves, etc., require the posting of laminated or flexi

glass-housed instructions and diagrams. Specify the specific information

to be posted for each piece of equipment and the type of mounting

material to be used. The locations of where to post instructions/diagrams

are to be approved by the CME. Some types of posted information

include:

a. Start-up sequence, normal running and shutdown sequences, along

with maintenance checks and lubrication requirements, etc.

b. Information extracted from the design drawings and equipment

manuals. Include sub-system schematic diagrams.

3.3.5 Labeling and Tagging of Electrical Wiring.

For all electrical work related to sewage equipment, require that the

Contractor (or entity performing the work) label and tag all electrical

connections in control boxes, power panels and motor control panels.

Require also that the wiring be neatly bundled and that an “As-built” point-

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to-point wiring diagram be mounted inside each electrical panel. The

wiring diagram shall show the labels assigned to each circuit. This

diagram shall also be included in the lift station O&M Manuals.

3.3.6 Training.

If training is required for the operation and/or maintenance of new

equipment or a new process, indicate in the specifications the specific

training requirements by specifying topics or equipment for which training

is to be provided, qualifications of the instructors and duration of training.

Require that the Contractor submit a lesson plan for approval by the

Contracting Officer. O&M Manuals should be provided to the Government

trainees prior to the formal training session(s).

3.3.7 Special Tool Requirements.

On occasion, special tools will be required for such work as operation,

calibration, adjustment or service maintenance. For any type of

equipment, if such special tools are required (including instruments and

meters), the specifications are to require that these items be furnished as

part of the contract. A list of special tools shall be provided in the O&M

Manuals provided to the Government.

3.3.8 Spare Parts.

At least one (1) set of all manufacturer-recommended spare parts shall be

provided with all operational equipment. This includes such items as “O”

rings, bearing sets, belts, valve and pump packing material, etc. in

addition, for chart recording equipment, a one-year supply of charts and

ink shall be provided. A list of spare parts shall be included in the O&M

Manuals provided to the Government.

3.3.9 Contractor-Furnished Fuel, Lubrication, Etc.

If fuel, lubrication, etc. are required for startup and/or testing of any

equipment (e.g. emergency generators), the materials and associated

labor are to be provided by the Contractor.

3.3.10 Cathodic Protection.

Sewer facilities may be located around the coastal areas where

underground structures such as drywells are subject to contact with high-

chloride ground water. The designer should determine the need for

cathodic protection of such facilities as underground “can-type” lift

stations. The designer should also check to determine if the new facility

will be in the vicinity of existing impressed current systems; the new facility

should be designed accordingly. If protecting a “can-type” underground

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drywell, the design should include electrically-isolated pressure couplings

on any metallic discharge pressure main exiting the lift station facility to

ensure electrical discontinuity between the station structure and the

pressure main piping. Due to varying ground current conductivity

characteristics encountered with subsurface soil variation, any cathodic

protection of pipelines should be independent of the system protecting the

lift station. To the fullest extent possible, use of cathodic protection for

wastewater systems should be avoided by specifying on-metallic (non-

anodic) materials.

3.3.11 Location of Control Panels, Breaker Panels, Etc.

Occasionally, sewerage of a new naval facility requires the construction of

an appurtenant lift station. Lift stations that will be operated and

maintained by the NAVFACMAR BOSC are required to meet the minimum

lift station design standards provided herein. All lift station control panels,

breaker panels, telemetry panels, etc. are to be located at the lift station

site. Access to these lift station panels by NAVFACMAR BOSC lift station

personnel must not be encumbered by access controls other than lift

station access control gates, especially after normal working hours. Also,

electrical junction boxes and splice boxes shall not be located in the lift

station wetwell.

3.3.12 Meters.

All lift stations shall be equipped with an electrical consumption meter. All

lift stations with variable speed motor controls shall be equipped with

magnetic sewage flow meters and electronic recorders. Generally, all

duplex lift stations with individual constant speed primary pumps rated at

200 gallons per minute or greater will require a sewage flow meter with an

electronic recorder. Consumption meters shall follow sections 2.3.4.

and/or 4.4. Meters used in the SCADA system shall follow guidance in

section 3.3.15. Provide test valves.

3.3.13 Potable Water Supply with Backflow Preventer.

All lift stations shall be provided with a potable water supply with a

standard hose bib and a reduced-pressure type backflow preventer of a

design approved by the NAVFACMAR BOSC Potable Water Division.

3.3.14 Variable Frequency Drives.

For all lift stations where variable speed pumping is required, variable

frequency drives (VFD) shall be specified. The VFD installation shall

include built-in harmonic filtering to prevent spikes from transitioning back

into the alternating-current power supply, an external bypass feature to

allow manual operation of the pump motor in the event of VFD

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malfunction, and a built-in feature to prevent back-spin of the pump

motors. The VFD shall be the constant-torque type and shall be provided

with a manual bypass and programmable restart feature that allows for a

minimum of five (5) programmable restarts. The selected VFD shall be

oversized 10% above the motor amperage rating and shall be climate-

protected according to the manufacturer’s recommendations. External

power surge protection shall be provided to protect the VFD from unstable

source power, external power spikes, and lightning. The Contractor shall

be required to provide the NAVFACMAR BOSC Wastewater Manager

(phone: 339-1794) via the Contracting Officer’s representative one set of

manufacturer-recommended spare parts.

3.3.15 SCADA

3.3.15.1 When modifying or adding new SCADA components, the components

shall be technically and operationally compatible with the existing Navy

Waste Water SCADA system. The installer shall integrate all modified or

added components with the existing SCADA system such that the

following criteria are satisfied:

a. All components shall have permanent communications paths to the

SCADA system server at Apra Harbor Waste Water Treatment Plant

(WWTP) control room.

b. Communications and requirements for cybersecurity shall follow

section 5.

c. Minimum points are to include pressure, flow rate, water level, intrusion

detection, alarms for failure or warning conditions, and motor/pump

control and status (runtime, temperature, speed, notifications of

failures or malfunctions, etc.).

3.3.16 Sewage Pumps and Ejectors.

In the past, there have been a number of packaged-type pneumatic

sewage ejector stations constructed for the Navy’s various sewage

collection systems. These pneumatic ejectors have proven to be very

costly to maintain and will no longer be accepted. Wet wells with duplex

submersible pumping units shall be specified in lieu of pneumatic ejectors.

Sewage pumps shall be capable of passing 3-inch solids and shall be

manufactured specifically for sewage applications. The Contractor shall

be required to provide the NAVFACMAR BOSC Wastewater Manager

(phone: 339-1794) one set of manufacturer-recommended spare parts

(wear rings, mechanical pump seal kits, etc.). Also, affixed to each pump

and pump motor shall be an embossed metallic manufacturer’s nameplate

data tag that identifies the model and serial numbers and factory-certified

operational data. Factory-certified pump curves shall be included in the

O&M Manuals provided to the Government. Elapsed time (run time)

meters shall be provided for each sewage pump motor.

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Flow velocities in pressure mains shall be designed to be within the range

of 3-5 feet per second to ensure adequate scouring during diurnal peak

flow periods. In order to minimize pipe friction losses and system energy

consumption, maximum transmission velocities shall not exceed 6 feet per

second. Hydraulic calculations that demonstrate proper transmission

system sizing (force main and pump) shall be submitted with design

review submittals.

3.3.16.1 Pump Types.

Submersible pumps, self-priming suction pumps and vertical dry-pit

centrifugal sewage pumps will be considered for use in the Navy’s

wastewater collection systems. If provided, submersible pumps shall be

furnished with stainless steel guide rails and stainless steel lift chains.

Use of pumps other than submersible pumps must be reviewed and pre-

approved by the NAVFACMAR BOSC Lift Station section (For NBG) on a

case-by-case basis. Pump stations with duplex pumping units shall be

designed with 100 percent pumping redundancy which allows for one

pump to be removed for servicing with the remaining pump fully capable of

handling the peak hydraulic pumping demand. Pump stations with more

than two pumps shall be similarly designed with redundant pumping

capability – they must be able to handle the peak hydraulic pumping

demand with its largest pumping unit out of service.

3.3.16.2 Pumping Redundancy Requirement.

Duplex pump systems shall be designed for 100% pumping redundancy --

lift stations shall be designed to compliantly convey the peak design flow

with one of the two primary pumping units out of service.

3.3.16.3 Pump Seals.

For centrifugal dry-pit pumps, pump seals shall be of the mechanical “split-

seal” type which enables the replacement or repair of the pump seals in

the field without the need for pump disassembly and impeller removal.

Seal installation procedures and one set of manufacturer-recommended

spare parts (mechanical split-seal kit which includes special installation

tools) shall be provided to the Supervisor of the NAVFACMAR BOSC Lift

Station section. Consult with the NAVFACMAR BOSC Lift Station

maintenance Supervisor for proper seal selection. Pumps may be ordered

from the manufacturer with the mechanical split-seal pre-installed at the

factory or the pump can be ordered with standard gland packing and the

split seal installed by the Contractor at the job site. In any case, the pump

shall be covered by standard warranty provisions.

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3.3.16.4 Pump Motor Controllers.

There are various types of pump controllers used for sewage lift stations--

hydro-pneumatic bubblers, bulb float switches, axial ball floats, ultrasonic

transducers and pressure transducers. The airline of a hydro-pneumatic

bubbler can sometimes get clogged which will result in a malfunction in

the motor control system. Bulb float switches and balls floats sometimes

malfunction when they get hung up in the oil/grease blanket that forms on

the liquid surface in a wetwell. Ultrasonic transducers can give false

readings when well obstructions such as submersible pump guide rails,

and interior piping and walls are detected. For this reason, do not specify

these types of pump controllers unless otherwise approved by the

NAVFACMAR BOSC Lift Station section.

By far, submersible pressure transducers that sense the varying well head

pressures have proven to be the most reliable type of pump controller

currently available. They also require the least amount of maintenance.

Specify this type of controller for all new projects unless directed otherwise

by NAVFACMAR BOSC Wastewater Manager (phone: 339-1794).

For lift stations with duplex pumping units, the motor control system shall

include an alternator that automatically alternates pump starts to balance

pump/motor run times. Although duplex lift stations are to be designed

with 100 percent pumping redundancy, the motor control system shall also

provide a high wetwell start for the “idle” pump in the event the “active”

pump trips out or malfunctions. Also, the motor control system shall be

equipped with a wetwell level indicator calibrated to correspond to wetwell

level increments of no greater than 3-inches.

3.3.17 Stand-by Emergency Power Generator.

Most of the Navy’s lift stations are located around or near the waterfront.

Others are located near drainage inlets and non-Department of Defense

properties. It is preferred all new critical lift stations be equipped with

standby emergency generators that are capable of handling the full

electrical load of the lift station (environmental compliance requirement).

These generators shall be equipped with an automatic transfer switch

(ATS) to automatically transfer the lift station electrical load to the

stabilized emergency generator in the event of a power failure. ATS shall

be located in the same room as the stand-by power generator. ATS shall

be provided with (open transition) by-pass switch.

Provide removable blanket-type high thermal insulation for the generator’s

exhaust muffler/exhaust piping system.

The appurtenant fuel tank shall be capable of supplying sufficient fuel to

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support a single pumping unit for 48 hours of run time. Include information

and data on emergency generators and automatic transfer switches in the

O&M Manuals provided to the Government.

3.3.18 Valves and Fittings.

Lift station control valves and fittings shall be flanged with 316 stainless

steel nuts and bolts. In order to prevent galvanic corrosion, all metallic

materials that comprise the pressure piping system shall be compatible

with each other. All pressure piping and fittings shall be current industry-

standard and shall be available locally.

For lift stations with submersible sewage pumps, include a station air

release valve at the high point of the discharge piping. This air release

valve shall be designed specifically for sewage applications and all interior

mechanical components shall be fabricated of stainless steel. Valves with

plastic components will not be accepted. Discharge from the air release

valves shall be vented to the wetwell or to an upstream influent manhole.

3.3.19 Wetwell.

Wetwells shall be designed to facilitate accessibility for cleaning purposes.

They should also be properly configured based on the type of sewage

pump specified. Wetwells are generally reinforced concrete structures.

Due to the corrosive wetwell environment, surface concrete laminate

spalls typically occur as the reinforcing bars oxidize. Prior to use, the

inside walls of the well shall be coated with an appropriate type of

enduring protective coating, such as a coal-tar epoxy seal, to preserve

and protect the structural reinforcement. Joints of precast sections, as well

as all pipe penetrations, shall be properly grouted prior to coating. Cast-

in-place concrete shall be allowed to fully cure and any surface cracks that

develop after the curing period shall be properly filled prior to coating the

interior of the well. Ductile iron piping/fittings installed inside wet well shall

be coated with appropriate type of enduring protective coating.

3.3.20 Security.

Fencing and Locking Devices. All lift stations shall be surrounded by a

minimum 7-feet high security fence, a pedestrian swing gate and an

outward swinging vehicle access gate that provides unobstructed access

to the wetwell (for cleaning purposes) and to the lift station pumps and

motors (for overhaul removal). All lift station building structures, vehicle

gates, wetwell hatch doors and valve-pit hatch doors shall be equipped

with padlock hardware. No key-locking hardware will be utilized for

sewage lift stations. All operational lift station control panels and breaker

panels shall be located within the lift station security fence.

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3.3.21 Emergency Pump Connection.

All lift stations shall have an emergency bypass hose connection

assembly to the pressure main exiting the lift station to allow a station lift

bypass with a portable pump. This hose connection assembly shall be

equipped with a plug valve in the closed position and 4-inch or 6-inch

quick-coupling type cam-lock connectors (female) with protective cam-lock

plugs (male). Nominal four-inch assemblies shall be used for all pressure

mains up to 8 inches; 6-inch couplings shall be used for pressure mains

up to 10 inches. This hose connection shall be located within proximity of

the lift station’s wetwell whereby suction hoses from a portable pump will

be able to draw sewage from the station’s wetwell and discharge into the

pressure main via the bypass hose connection assembly.

3.3.22 Lift Station Lighting.

Operational lighting shall be provided at all lift stations for night-time work.

Lighting shall include areas in or around the wetwell and at all control

panels. Any lighting provided in a wetwell or around areas where sewer

gases can vent shall be explosion-proof. Emergency lights shall also be

provided as necessary.

3.3.23 Prequalification of Electrical Contractor.

For all projects requiring work on any sewage lift station motor control

system, include the following electrical contractor prequalification

requirements in the contract solicitation package.

a. The contractor shall have a minimum of 10 years’ experience in

industrial Motor Control Systems (installation, troubleshooting,

repairing).

b. The contractor shall have at least 5 years of experience with

Programmable Logic Control (PLC) sub-systems. The contractor shall

demonstrate an understanding of how PLC sub-systems function in

conjunction with Motor Control Systems.

c. The MCC supplier shall provide start-up and testing services.

3.4 INDUSTRIAL WASTEWATER DISCHARGE

NAVFACMAR EV currently does not have a pretreatment system for

Industrial Wastewater. When an Industrial Wastewater Pretreatment

Program is established this section will be developed further to manage,

regulate and enforce the program.

No one shall discharge or cause to be discharged any industrial

wastewaters into any NAVFACMAR wastewater collection systems

without written approval from NAVFACMAR EV.

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Hydro-test water, chlorinated or de-chlorinated water from pipe line

disinfection operations and flush water from storm drain cleaning

operations will be considered non-industrial wastewaters that can be

disposed of by means other than by discharge into the domestic sewer

collection system

For project designs that involve the discharge of industrial wastewater and

which may require pretreatment devices such as oil-water separators,

grease interceptors, sediment/lint traps, neutralization tanks, silver

recovery units, etc., progress design submittals shall be provided to

NAVFACMAR EV for review and approval prior to construction.

3.5 ATTACHMENTS AND FIGURES

3.5.1 Lift Station Requirements Checklist.

a. Constant-speed duplex pumping units with 100% pumping redundancy

– single pumping unit must be independently able to convey peak

design flow; alternating pump starts with Hand-Off-Auto controls for

each pumping unit. Pumps must be able to pass 3” solids.

b. Dedicated lift station electrical feeder with power panel within the lift

station compound. Electrical consumption meter that conforms to

NAVFACMAR PWD Utilities standards. Standard 110V electrical

outlets.

c. Potable water supply with backflow preventer that conforms to

NAVFACMAR PWD Utilities Potable Water standards.

d. Standby emergency generator (with automatic transfer switch) that is

capable of at least 48-hours of continuous run time for critical sewer

pump stations. Generator shall be housed in a non-corrosive, all-

weather enclosure. Provide lift station master switch (master breaker

or manual throw-switch) to isolate shore power to the lift station for

generator load tests.

e. Bypass riser with female cam-lock fitting and male plug that connects

to the sewer pressure main for either a 4” or 6” discharge hose from a

portable pump (design to dictate sizes of riser & fittings and number of

hose connections). Provide a plug valve and check valve on the riser.

f. Standard control valves (plug/check) on each pump discharge line. For

dry-pit pump designs, provide inlet control valves for each sewage

pump. For dry-pit pump installations, also provide a ¾” stainless steel

ball/shutoff valve on the pump to release entrapped air (in the event of

pump air-lock); direct ¾” air-bleed piping to floor drain or to drywell

sump pit.

g. Force main velocity of 3-5 feet-per-second. Minimum force main size of

4”.

h. Wetwell operational volume and lift station pumps designed for no

more than 5-6 pump starts per hour.

i. “High Wetwell” alarm float (normally-open wetwell float switch).

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3.5.2 Design Review Checklist.

In order to provide design and construction agents with insight on some

common design/construction concerns of NAVFACMAR PWD Utilities a

general design review checklist was developed. In addition to protecting

and preserving the integrity of the Navy’s wastewater systems, such basic

design checks can prevent some common field problems and costly

change orders during construction, as well as operational problems during

post-construction systems maintenance. The design submittal-review

process could be made more efficient if designers are aware of these

basic checklist items. Most of the checklist items below are based on

“lessons learned” from earlier facilities construction projects.

I. General

a. Check hydraulic calculations for proper scouring/flow velocities and

flow capacities.

II. Plans

a. Sewer Notes

1. Check for applicable Sewer Notes from the Sewer Design and

Construction Guide.

2. Include a note stating that any damage to Navy sewer lines shall be

reported immediately to the NAVFACMAR BOSC Service Support

Center (phone: 333-2011) via the Contracting Officer’s

Representative. Any sewer repair performed by the Contractor shall

be inspected and approved by the Line Section of the

NAVFACMAR PWD Utilities prior to backfilling.

3. Include a note requiring the Contractor to field-locate and mark all

sewer lines within the project site prior to performing any site

excavation. Ensure all known sewer lines are depicted on the

various site plans – field topographic surveys should show the

gravity lines between manholes. Gravity mains can generally be

assumed to follow a straight alignment between manhole sections;

field locating some old non-metallic force mains (e.g. - asbestos-

cement pipe) may require the use of ultrasonic detection methods.

b. Design Drawings

1. Ensure that existing sewer lines and manholes are shown on the

various base plans-field topographic surveys should show the

gravity lines between manholes.

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2. Review Electrical/Mechanical site plans against Civil site plans to

check for areas of potential conflict – particularly for electrical duct

crossings and mechanical grade provisions. Ensure Civil Engineer

/ Designer accounts for all crossings on new sewer line profiles.

Where new electrical/communications ducts cross existing sewer

lines, ensure that the plans establish and appropriately address line

invert depths and protection of the existing sewer lines. Since

Electrical and Civil site designs are usually performed

independently, it is imperative that the Electrical, Mechanical and

Civil designers coordinate their respective site design layouts.

Check Mechanical designs for pad-mounted mechanical equipment

and associated power feeders. For the benefit of the Electrical and

Mechanical sub-contractors, and to ensure that their construction

work accounts for the presence of site sewer provisions, the sewer

system should also be shown on the various Electrical and

Mechanical site plans (background).

3. Various Site Plans: Check all site plans to ensure that structures

(including but not limited to buildings, backflow preventers,

transformer pads, mechanical equipment and anchor walls) are not

built over or too close to sewer lines – can use general rule-of-

thumb of 1:1 excavation to width clearance, but not less than the

minimum setback clearances established in the Sewer Design and

Construction Guide. Assume that at some point in the future,

sewer line excavation repairs may become necessary. Project

designs shall include the relocation of existing sewer lines, as

necessary, to comply with the structure setback requirement.

4. Landscape/Demo Plans/Civil: Check Landscape and Demo plans

for tree removals and planting setbacks relative to sewer lines.

Include Landscape/Demo note requiring Landscape/Demo

Contractor to coordinate with the Site Contractor to field-locate and

mark the locations of all sewer lines prior to commencing any site

landscape/demo work. May also be applicable to site

clearing/grubbing. For facility demolitions, ensure that sewer

service connections are properly terminated prior to demolition –

provide details.

5. Check various design plans for locations of light/utility poles, flag

poles, structural guy anchors, sign post footings and fence post

footings for potential conflict with sewer lines – especially if footing

holes may be augered. Include appropriate notes and callouts to

mitigate potential adverse impacts to sewer provisions. Wind loads

on certain types of poles have the potential to exert lateral soil

pressure on nearby sewer pipes; any excavation of the sewer pipe

for repairs could result in collapse of poles due to reduced reactive

soil pressure to support its footing – be especially wary of such

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poles and have the Structural designer check for such loading

conditions.

6. Structural/Civil: For mass excavations parallel to sewer carrier

pipes, as is common along waterfront areas for sheet pile

construction and for deep trench excavations, the Structural design

should require underpinning of the excavations to prevent buckling

of the trench wall (soil slip failure) that could easily result in damage

to adjacent sewer pipes. For gravity mains, pipe joints and

hydraulic profile could be affected; for pressure mains, be

especially cognizant of concrete thrust blocks that could be

undermined by such excavations.

7. Structural (Wall Footings): All structural wall footings crossing

underground sewer lines should be profiled (show sewer crossings

on footing profile) or detailed at sewer crossing locations. The

Structural design shall include appropriate provisions to ensure that

underground sewer lines are adequately protected from footing

loads and possible long-term wall settlement. Address potential

damage to sewer pipe from foundation compaction operations.

8. Civil/Mechanical (Cleanouts): (1) Check for required full-sized

service cleanout 5’ from the building line on each service lateral; (2)

Check for cleanout detail with material schedule that clearly shows

how the main line transitions through the riser section to the brass

cleanout plug; (3) Provide concrete grade collar around cleanout

head.

9. Civil/Landscape Plans (Manholes): (1) Check Grading and

Landscape plans to ensure that work will not result in any buried

manholes or manholes in sump areas – provide notes or callouts as

appropriate to ensure that any affected manhole frame and cover

are adjusted to the new finish grade – provide detail; (2) For work

involving paving, resurfacing or sidewalk/slab construction include

appropriate notes requiring the Contractor to adjust all affected

manhole frames and covers to the new finish grade – provide

detail.

10. Civil: All new sewer lines shall be profiled. Show all underground

crossings along the sewer line profile alignment.

11. Civil: Check to ensure that the following details are provided as

applicable: (1) Trench Section that shows enveloping granular pipe

cushion, tracer wire and buried warning tape; (2) Standard Manhole

Base Channelization Detail – be sure that the design does not allow

for influent pipes to be constructed on top of existing channel

benches – re-channelize all flow channels to Standard.

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12. Civil: Check if the project may require any potable water outages

that could adversely affect lift stations with mechanical pump water

seals.

13. Civil: Ensure that safe vehicular access is provided to all manholes

without having to drive over grassed lawns or landscaped areas.

14. Electrical/Mechanical: Check Electrical and Mechanical designs to

ensure that nothing is grounded to any sewer system provision.

15. In general, City and County Sewer Design Standards would be

acceptable with a few exceptions: (1) Rungs are not desired in

manholes; (2) In rare and exceptional situations, internal manhole

drop piping will be accepted. (3) Manholes and valve structures

shall not be allowed in roadway areas.

16. Lift Stations: Because sewage lift station designs can vary greatly

depending on flow demand, application and location, the cognizant

Navy facilities representative (Planner, EIC/PDE) should consult

with the NAVFACMAR PWD Utilities Collection Systems Engineer,

as necessary, early in the planning/design process to establish site-

specific design requirements. Basic requirements include full-load

standby emergency generator, SCADA connected and integrated to

the Apra Harbor WWTP per section 5 and three comprehensive

sets of O&M manuals to include specified/certified pump and

system curves. NAVFACMAR PWD Utilities Standard Details for a

typical Duplex Submersible Pump Lift Station are available –

contact the NAVFACMAR PWD Utilities Collection Systems

Engineer. Also, a list of basic lift station requirements is provided in

Attachment 5.2.

17. Dockside Ship Wastewater Provisions: Pipe hanger assemblies for

suspended under pier collection manifold piping shall be 316

stainless steel (threaded rods, pipe saddles, nuts & bolts); provide

locking nuts on assemblies. Terminal CHT hose connection risers

shall have a pressure isolation valve and shall have a nominal 4”

female cam-lock hose receptor with male cam-lock plug chained to

the assembly. Ship services require that those receptor fittings be

bronze (consult with Ship Services for specifics when detailing the

hose receptor/riser provisions – dockside provisions should also be

reviewed/approved by Ship Services, NAVFACMAR BOSC Port

Operations.

III. Specifications

a. Check front-end general provisions to ensure that the contract does

not commit NAVFACMAR PWD Utilities Work Centers to any work on

the Contractor’s work schedule. Include such wording as – “Contractor

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shall independently field locate…”, etc.

b. Clearing and Grubbing: Review this spec section against the scope of

work to see if special provisions may be necessary for the protection of

sewer system provisions. Check tree root removals in the vicinity of

existing sewer lines.

c. For new sewer line construction, check to ensure that post-

construction CCTV inspection provision is included in specs.

d. Review demolition specs to ensure that appropriate provisions are

included to protect sewer lines from damage, demolition debris,

landscape removals, etc.

e. Check wording of material and performance specs to ensure that there

is no ambiguity between specs and drawings – in the event of a field

conflict, specs will usually govern over drawings.

f. Contractor shall provide NAVFACMAR PWD Utilities, via the

Contracting Officer, with a copy of all approved material submittals for

wastewater system construction (pipe, fittings, couplings, valves, etc.).

3.5.2 Sewer Design Discussion.

This attachment is intended to provide insight into design and construction

requirements referenced in sections 3.1, 3.2, 3.3, and 3.4 of this

document. Discussion is provided for each section, as noted.

a. Existing Underground Utility Lines (Section 3.1.2).

If sewer manholes are depicted on topographic surveys, the designer

shall ensure that connecting main lines are depicted as well so that

other collateral site designers and construction agents are aware of

where the underground mains are located. This will minimize the

likelihood of damage to Navy sewer mains and costly change orders,

warranty rework or post-warranty latent defect rework.

Figure 3-3 depicts a 2” diameter PVC conduit for a communications

line that was constructed through a 6” diameter clay sewer main.

This was discovered during a CCTV sewer main inspection.

Other types of sewer line damage that have resulted from construction

activities include the following:

Guy anchor rods driven through sewer pipe; electrical grounding rods

driven through sewer pipe; augers (for sign/fence post footing

construction) driven through sewer pipe; deep concrete mounting

bases for light standards constructed over sewer pipe.

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Figure 3-3

Figure 3-4 depicts a deep concrete mounting base for a parking lot

light standard that was constructed directly over a 6” clay sewer main

pipe. The background topographic features on the design site plan

showed the existing sewer manholes, but no connecting mains were

depicted. In multi-discipline project designs, such omissions can result

in field conflict and costly change orders. The sewer main pipe was

crushed, resulting in a major sewage backup.

Figure 3-4

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Figure 3-5 depicts a sewer flush-cleaning head that got stuck on a

grounding rod that was driven through a clay sewer main pipe.

Figure 3-5

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b. Construction Notes (3.1.6).

1. The contractor shall be responsible for performing and maintaining

any incidental sewage bypass pumping or diversion work that will

be required to accomplish the construction work.

2. For any new concrete surface that will be exposed to sewage flow,

the contractor shall maintain sewage bypass/diversion operations

for the duration of the specified curing time for the concrete.

3. The contractor shall be responsible for providing and maintaining

temporary power as necessary to maintain normal lift station

operations.

Discussion for notes “1”, “2” and “3”: Some projects may require a

new manhole to be constructed over an existing live main that

requires the field channelization of the new concrete base or

demolition and reconstruction of the concrete base of an existing

manhole to accommodate a new flow channel. Raw sewage shall

not be permitted to contact the fresh concrete surface during its

specified curing period. Also, brief outages may be necessary when

working on primary or secondary power affecting an existing lift

station. In such instances, the contractor shall provide and maintain

bypass provisions or temporary generator power to maintain normal

lift station operations. In cases where portable generator provisions

may be needed in order to maintain normal lift station operations,

the following note might be more applicable.

4. The contractor shall be responsible for damage to any Government

utility system resulting from construction operations; any damage

shall be reported immediately to the Contracting Officer or

appropriate Government Representative. Any sewer repair

performed by the contractor shall be inspected by the

NAVFACMAR PWD Utilities Inspector prior to backfilling.

Discussion for note “4”: This general comment should be included

on all construction drawings, whether or not work is to be

performed on a utility system, especially when excavation is

involved or where vibratory stresses may affect underground utility

lines (such as pile driving operations or where site demolition may

involve the use of a heavy tracked vehicle like an excavator). Also,

projects that require the construction of wall footings, fence post

footings, sign footings, concrete base mounts for outdoor lighting

structures, guy anchors for poles and electrical grounding rods can

also damage underground utility lines. For underground mounting

structures that have the potential for exerting lateral soil pressures

on adjacent underground utility lines (wind loads on flag poles,

vehicle impacts to sign posts, etc.), a design evaluation should be

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performed by a qualified structural or soils engineer.

5. The contractor will be responsible for regulatory fines or penalties

that may be imposed by environmental regulatory agencies (EPA

and/or State DOH) in the event of sewage overflow or spill resulting

from construction operations.

Discussion for note “5”: The Navy’s wastewater collection,

transmission and treatment systems are under the strict regulatory

guidance of the Federal Environmental Protection Agency (EPA)

Region IX and the State of Hawaii Department of Health (DOH).

6. The contractor shall reimburse the Government for any emergency

response effort that may be required by Government forces to

mitigate the adverse effects of any sewage overflow or spill

resulting from the contractor’s operations.

Discussion for note “6”: This note would typically be used together

with note “e” above. Contractors shall reimburse NAVFACMAR

BOSC for costs associated with such government emergency

response efforts, which may include material, equipment and labor

costs. For certain critical projects, the contractor should have an

account established with NAVFACMAR Comptroller prior to

commencing construction work.

7. Any sewer manhole to be abandoned shall have its cone section

removed and disposed of, pipe penetrations plugged with Class “C”

concrete and the remaining riser structure backfilled and

compacted to finish grade. (and/or)

8. Cleanouts on any abandoned service lateral shall be plugged and

terminated a minimum of 12 inches below finish grade.

9. Prior to abandonment, pipe shall be filled with flowable fill as noted.

Discussion for notes “7”, “8” and “9”: The intent of this requirement

is to minimize the potential for localized soil erosion into abandoned

void spaces that could eventually result in the development of

sinkholes. This also prevents unauthorized connections to

abandoned portions of the collection system. Under certain

situations, NAVFACMAR PWD UEM may require that abandoned

pipe be filled with flowable fill prior to abandonment.

10. The contractor shall contact the Supervisor of the NAVFACMAR

BOSC Line Section to make arrangements for the Government to

take custody of salvageable sewer manhole frames and covers.

Manhole frames and covers not accepted by the Government shall

be disposed of by the contractor.

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Discussion for note “10”: The applicability of this note would be

determined on a case-by-case basis during the design phase

based on the quantity and type(s) of frames and covers. Standard

Type SA and SB frames and covers can be reused by the

NAVFACMAR BOSC Line Section; older types generally do not

have any reuse value.

11. When working on dockside or under pier ship wastewater collection

system piping, the contractor shall first mechanically secure and tag

out hose connections along the entire length of the common

pressure manifold prior to working on the system.

Discussion for note “11”: In the field, it may not be readily apparent

that dockside ship wastewater hose-connection risers are

interconnected through a common under pier pressure collection

manifold. Besides addressing the concern for possible sewage

discharges into harbor waters, the primary intent of this note is to

protect the contractor’s workers from accidents that could result

from unanticipated pressure discharges into the common pressure

manifold from an adjacent ship berthing area, particularly from

submarines (high pressure pneumatic blow downs). The designer

should clearly depict the extent of any common pressure manifold

in the construction drawings.

12. Potentially lethal levels of hydrogen sulfide (H2S) gas may develop

in the gravity sewer collection system.

Discussion for note “12”: For a worker who is not familiar with the

layout and operation of a localized portion of a sewer collection

system, intermittent upstream pressure main discharges into the

gravity collection system may not be readily apparent. During the

time the upstream pressure transmission system is inactive

(associated lift station not actively conveying flow), there is the

potential for hazardous hydrogen sulfide gases to develop in the

airspace of the inactive pressure main pipe. When the associated

lift station initiates flow transmission in certain areas, the hydrogen

sulfide gas that can form in the pressure main pipe can be

evacuated into the downstream gravity collection system which

could have an immediate adverse effect on the air quality in gravity

system manholes immediately downstream of the pressure main

discharge. The same kind of hazard can be encountered in gravity

manholes immediately downstream of anaerobic ship/submarine

collection and transfer (CHT) tank discharges. Under such

circumstances, continuous monitoring of the air quality in the

manhole space may not be sufficient to protect the life and safety of

worker inside the manhole unless the worker is fully equipped with

a self-contained breathing apparatus (SCBA). The designer should

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ensure that applicable confined space entry requirements and

specifications are included in the construction contract.

13. The contractor shall ensure that loose material, tools and

equipment from construction operations are appropriately removed

from the sewer collection system. Any damage to downstream lift

station equipment resulting from negligence will be assessed to the

contractor.

Discussion for note “13”: Such items as grout mix buckets and

brushes (from manhole interior finishing), lengths of tracer wire,

cable strands, mop heads, etc. have been dislodged from pump

impellers. Also, backfill gravel and pavement base course material

have been removed from gravity collection mains.

14. Prior to securing potable water outages in mains or service

connections, the contractor shall first provide and maintain a

backup seal water provision to lubricate pump seals at the affected

sewer lift station shown on the plans. Coordinate access to the

affected lift station, at least 3 days in advance of the outage, with

the NAVFACMAR BOSC Lift Station Supervisor.

Discussion for note “14”: The sewage pump seals at most large

(multi-level) Navy sewage lift stations are lubricated with water from

the Navy potable water distribution system. Prolonged water

outages will result in damage to pump seals and could ultimately

result in pump failure. The designer should first identify any sewage

lift station that may be affected by the water outage (plan file

research, field investigation and/or consultation with cognizant

NAVFACMAR Potable Water personnel) and ascertain whether its

pumping units utilize potable water for pump seal lubrication

(contact the NAVFACMAR BOSC Lift Station Supervisor).

15. Adjust all manhole frames and covers to the new finish grade.

Discussion for note “15”: There have been roadway resurfacing

projects and pedestrian walkway projects that have effectively

buried sewer manholes. This note should also be used on projects

that involve the changing of finish grades in the vicinity of

manholes. It is generally assumed that the designer for such

projects will exercise due diligence in researching and identifying

any and all underground utility systems that may be affected. On

projects that involve manhole frame/cover adjustments, the

designer should also provide a detail for the adjustment.

16. Make advance arrangements (3 working days minimum), through

the Contracting Officer, with the Line Section Supervisor of

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NAVFACMAR PWD Utilities for joint ROICC/NAVFACMAR PWD

Utilities inspection of any new wye saddle construction. (applicable

to new service connections to existing sewer mains)

Discussion for note “16”: The construction contract shall require

that a project account be established with the NAVFACMAR

Comptroller for these special Government inspections; the

cognizant ROICC construction contract administrator should

provide the NAVFACMAR PWD Utilities with the applicable job

order number for the inspection at the time of scheduling the

inspection. Such inspections will be required for all construction

projects where work is performed on the Navy’s sewer system,

even when such connections are an incidental part of a larger

project scope. Poor workmanship in the construction of wye saddle

connections has been a contributing factor in some line blockages;

for this reason, sanitary wye fittings are preferred where possible.

For new service connections to existing sewer manholes, the joint

ROICC/ NAVFACMAR PWD Utilities inspection can be performed

during the final acceptance inspection for the overall construction

project.

17. During periods of non-work and for the duration of contract work

within the secured perimeter of the lift station, the contractor is

responsible for securing access gates, doors and security. After

normal working hours, the contractor is responsible for properly

securing access gates, doors and security fencing.

Discussion for note “17”: In most instances, it might be appropriate

to use this construction note in conjunction with earlier note “e”.

During lunch breaks away from the lift station site, workers shall

lock the access gate(s) to the lift station to prevent unauthorized

entry. In some cases, the contractor may be permitted to

temporarily remove perimeter chain link fence fabric to facilitate

construction work at the lift station. In such instances, the

contractor shall permanently re-affix the chain link fabric using

appropriate hardware in order to prevent unauthorized access

whenever the work site is left unattended.

18. Upon completion of the sewer construction, make advance

arrangements (3 working days minimum), through the Contracting

Officer, with NAVFACMAR PWD UEM for final acceptance

inspection of the new sewer construction.

Discussion for note “18”: Field construction that is not covered by a

CCTV inspection submittal (refer to Section 2.13.5, Post-

Construction CCTV Inspection) will be addressed during the final

walk-through inspection.

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19. Construction dewatering into the Navy’s sewer collection system is

prohibited.

Discussion for note “19”: Environmental compliance requirement as

directed by the Navy’s Federal Facility Compliance Agreement with

EPA Region IX.

c. Pipe Bedding (3.2.9).

Figure 3-6 depicts a fracture originating at a clay pipe joint with

groundwater inflow. The 45-degree angle of the fracture relative to

horizontal and vertical sectional planes suggests shear stress at work

on the joint face. Providing graded granular trench bedding material

around the entire circumference of the pipe will minimize the

development of concentrated stresses at pipe joints.

Figure 3-6

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d. Emergency Pump Connection (3.3.21).

Figure 3-7 depicts a “riser” type hose connection assembly with a female

cam-lock hose receptor and male plug, check valve and plug valve.

Figure 3-7

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3.5.3 Special Details.

Figure 3-8

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Figure 3-9

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3.6 Special GWA Requirements for Tie-Ins.

Contractor shall comply with GWA Final Developer Guidebook 2010 for

tie-in connections to existing GWA sewers.

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CHAPTER 4 - WATER

4.1 GENERAL INFORMATION.

This section covers general information for the water distribution system,

and water related facilities, including pump stations and reservoirs, as

applicable.

4.1.1 Subsurface Oil.

For all excavation work in the Naval Station, and Fleet Industrial Supply

areas, subterranean oil may be encountered. Check with the

NAVFACMAR EV coordinator for known or suspect contaminated soil

locations. Include appropriate construction and contract specifications to

address the handling and disposal of contaminated materials as

necessary.

4.1.2 Existing Underground Utility Lines.

Plans and specifications shall require toning for underground utilities.

Toning of the excavation area shall be performed prior to commencement

of any excavation work. In areas where nonmetallic pipe lines may be

present, ultrasonic detection methods or field-locating grade nodes

(manholes, valve boxes, cleanouts, etc.) may be used as appropriate.

Ground Penetrating Radar (GPR) systems shall be used prior to

excavation in all Shipyard areas. Research as-built construction drawings

and perform field investigations to ensure all known underground utility

lines are identified on the construction drawings prior to actual field

excavations. Perform soil borings sampling and testing when required.

Include a note and/or specification to indicate the cost of repairing any

damaged underground utility line shall be borne by the Contractor

regardless of whether or not the utility lines are depicted on the

construction drawings.

4.1.3 Outages.

The contractor shall request water outages via the NAVFACMAR BOSC

Service Support Center (telephone number 333-2011) via the Contracting

Officer’s representative, thirty (30) days prior to the desired date of the

outage. The contractor shall ensure that approval has been obtained for

the outage prior to performing work. All water outages shall be performed

by the NAVFACMAR BOSC, unless otherwise directed by the CME.

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4.1.3.1 Outage Duration.

Coordinate the water outage duration with the NAVFACMAR BOSC.

Water outages affecting an individual facility should not exceed four (4)

hours. Provide temporary water service to affected facilities when water

outages exceed four (4) hours, unless an outage duration beyond four (4)

hours is approved by the facility or housing manager and the Guam Naval

Base Fire Chief.

4.1.4 Connections to the Water Distribution System.

The Contractor shall provide the NAVFACMAR BOSC fourteen (14) days’

notice prior to connecting to any waterline.

4.1.4.1 Wet Tapping Mains Twelve Inches (12”) and Smaller.

a. The contractor shall be responsible for the following:

1. Material, Labor and Equipment – Except as otherwise indicated, the

contractor shall provide all material, labor and equipment to

connect new exterior water lines to the existing NAVFACMAR PWD

water distribution systems by use of tapping sleeves and tapping

valves or corporation stops.

2. Timing – The contractor shall perform the disinfection work at the

connection just prior to installation of the tapping. The disinfection

work shall be performed in the presence of the CME, NAVFACMAR

PWD Utilities personnel, and NAVFACMAR EV personnel. The

disinfection work shall be performed by a licensed Level 2 Water

System Operator.

3. Coordination and Notification - The contractor shall coordinate work

with the NAVFACMAR BOSC. The Contractor shall provide

NAVFACMAR BOSC a minimum of 14 days advance notice prior to

the date of the tap. Point of contact on this matter is NAVFACMAR

BOSC Service Support Center, telephone number 333-2011.

4. Payment of Government Services - Work by NAVFACMAR PWD

UEM on NAVFACMAR projects shall be done on a cost

reimbursable basis. All contracts requiring tapping of existing

NAVFACMAR PW exterior water lines shall reflect this

reimbursement requirement (see section 4.1.6).

b. The Contractor will provide, install and operate the tapping machine.

The equipment necessary for the installation and operation of the

tapping machine as well as the necessary cutting blades will also be

provided by the Contractor. Disinfection of the tapping machine will be

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done by the Contractor. All other work not specifically indicated as

being performed by the government shall be done by the contractor.

4.1.4.2 Tapping Sleeve and Valve Materials.

Tapping sleeves shall be either cast or ductile iron with mechanical joint

ends, unless otherwise approved by NAVFACMAR PWD UEM. All

tapping sleeves and tapping valves shall be a matched set and conform to

AWWA specifications. (The project designer shall indicate the appropriate

AWWA specifications.) The tapping valve shall be flanged by mechanical

joint for connecting to the tapping machine.

4.1.4.3 Other Connections Including Wet Tapping Mains for Larger than 12”

Lines.

The contractor shall perform all connection work. The connection work

shall be performed in the presence of the CME. The contractor shall

provide the NAVFACMAR BOSC a minimum of fourteen (14) days

advanced notice for the above purpose. All work and services provided by

the NAVFACMAR PWD UEM are on a cost reimbursable basis.

4.1.5 Contractor Submittals.

Contractor submittals shall be forwarded to NAVFACMAR PWD UEM, via

the Contracting Officer, for review and approval as applicable. See

Chapter 1.

4.2 WATERLINES.

This section covers requirements for waterline installations and repairs, as

applicable.

4.2.1 General Location.

Structures shall not be located over existing waterlines, except that a

building may be extended over laterals if the lateral serves only that

building. Waterlines shall not be designed within roadway areas unless the

waterline’s crossing is required for tie-in and/or completing the design for

the service area.

4.2.2 Clearances.

4.2.2.1 Clearances from Structures and Other Utilities (Excluding Sewer Lines).

Adequate clearance or a minimum of 5 feet between the edge of a

building (wall and roof line) and a waterline should be provided to enable

repair of the lines by use of heavy equipment. Three (3) feet horizontal

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clearance shall be provided between waterlines and other utilities (except

sewer lines). Vertical clearances shall be a minimum of six (6) inches.

Whenever concrete jackets are involved, the clearances shall be the total

clear distance between the concrete jacket and the utility line.

4.2.2.2 Horizontal Clearances from Sewer Lines.

A horizontal clearance of 10 feet shall be provided between water lines

and sewer lines or manholes. If this clearance cannot be provided

because of site conditions, the new waterline may be laid closer to 6 feet

clearance between the lines provided the following requirements are met:

a. The bottom (invert) of the water piping shall be at least 12 inches

above the top (crown) of the sewer piping. Where this vertical

separation cannot be obtained, the sewer piping shall be constructed

of AWWA-approved water pipe and pressure tested in place without

leakage prior to backfilling.

b. The sewer manhole shall be of watertight construction and tested in

place.

Note: Where water mains and sewers follow the same roadway, they will

be installed on opposite sides of the roadway, as approved by

NAVFACMAR PWD UEM.

4.2.2.3 Vertical Clearances from Sewer Lines.

Water piping shall cross above sewer piping and shall be laid to provide a

separation of at least 24 inches between the bottom of the water piping

and the top of the sewer piping. If this provision cannot be obtained

because of site conditions, the following requirements shall be met.

a. If the new waterline crosses above the sewer line, provide a concrete

jacket for the sewer line a horizontal distance of three (3) feet on both

sides of the crossing.

b. If the new waterline crosses below the sewer line, provide a concrete

jacket for the sewer line a horizontal distance of five (5) feet on both

sides of the crossing. Provide adequate structural support for the

sewer piping to prevent excessive deflection of the joints and settling

on and breaking of the water piping. The length of the water piping at

the crossing shall be a minimum of twenty (20) feet, and shall be

centered at the point of the crossing so that the joints shall be

equidistant and as far as possible from the sewer piping.

c. No water piping shall pass through or come in contact with any part of

a sewer manhole.

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4.2.3 Cover.

The minimum cover for transmission mains shall be three (3) feet. The

minimum cover for water service laterals 2-1/2 inches and smaller shall be

2.5 feet in paved areas, and 2 feet in non-paved areas. The maximum

cover over waterlines shall be eight (8) feet.

4.2.4 Pipe Jackets.

Use reinforced concrete pipe jackets where minimum pipe cover is not

available, and where minimum vertical clearances between sewer and

water lines cannot be obtained. When concrete jackets are provided, they

shall be provided with reinforcement. All concrete jackets shall start and

end at a pipe joint and the jacket shall be placed in a manner that will

allow the aforementioned joints to deflect.

4.2.5 Warning Tape and Tracer Wire.

Require the installation of buried warning and identification tape for all

waterlines. Require a tracer wire be provided for all non-metallic pipes. At

water valve buffalo boxes, the tracer wire shall be cut and both ends shall

extend to within 6” from the top of the boxes. At water valve boxes the

tracer wire shall extend into the box.

4.2.6 Deflections.

Maximum deflection for pipe joints shall be limited to 80% of the deflection

recommended by the manufacturer.

4.2.7 Pipe and Fittings.

Water distribution mains indicated as 100 through 400 mm (4 through 16

inches) diameter pipe sizes shall be polyvinyl chloride (PVC) plastic pipe,

and as an option ductile-iron may be considered. Provide high density

polyethylene (HDPE) pipe for 400 mm (16 inch) diameter or larger pipe

sizes. Verify with NAVFACMAR PWD utilities for the appropriate use of

HDPE as water distribution mains. The designer shall have the option of

selecting High Density Polyethylene (HDPE) Plastic Piping, but shall verify

if there are any adverse effects with long term exposure to chlorinated

water on HDPE pipe. Pipe, tubing, and heat-fusion fittings for High Density

Polyethylene pipe shall conform to AWWA C906, ASTM D 3035 and

ASTM D 3261. The designer shall have the option of selecting Fusible

Polyvinyl Chloride (PVC) Pipe, conforming to AWWA C-900/C-905, but

shall verify with the Contracting Officer prior to designing.

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4.2.7.1 Ductile Iron.

Ductile iron pipe and fittings shall conform to AWWA C151. Four (4) inch

diameter mains shall be thickness class 53 (minimum). Mains six (6)

inches in diameter and larger shall be thickness class 52 (minimum).

Loading and pressure considerations shall determine if a higher class is

required. Flanged pipe shall conform to AWWA C115, and flanged fittings

shall conform to AWWA C110 or AWWA C153. Pipe and fittings shall

have cement-mortar lining conforming to AWWA C104, standard

thickness. Provide polyethylene encasement except when cathodic

protection is provided.

4.2.7.2 PVC

PVC pipe shall conform to AWWA C900, and shall be a minimum

pressure class 235 (DR 18). Pipes fourteen (14) inches through thirty-six

(36) inches in diameter shall conform to AWWA C905. Fittings for PVC

pipe shall be ductile iron.

4.2.7.3 Minimum Size

Minimum diameter for distribution mains and fire branches is six (6)

inches.

4.2.8 Disinfection

All new or repaired potable water lines, fire protection main lines

connected to the potable water system and that are upstream of the

backflow prevention device, irrigation lines that are upstream of the

backflow prevention devices and affected portions of existing potable

water lines shall be flushed and disinfected. All work shall be done at the

contractor’s expense. The disinfection work shall be performed by a

licensed Level 2 Water System Operator.

4.2.8.1 Disinfection of New Waterlines.

Include following notes in the project specifications or in notes on the

drawings.

a. Disinfection of water lines, including flushing and bacteriological

testing, shall be in accordance with AWWA C651 (latest edition) except

as otherwise indicated below.

b. All connections to existing water lines shall be done in a “dry” trench.

When the existing water line has to be dewatered, the contractor shall

accomplish the dewatering of the line in a manner such that the

connection to the existing system can be done in a “dry” trench. The

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contractor shall submit a dewatering plan for approval.

c. For new pipe sections, chlorine shall be applied by the continuous feed

method unless prior approval has been obtained to use a different

method. Calcium hypochlorite granules shall be placed in new pipe

sections (except solvent-welded plastic and screwed joint steel pipe)

during construction as specified in AWWA C651.

d. When the line is chlorinated, water entering the line shall receive a

dose of chlorine fed at a constant rate such that the water will have not

less than 50 mg/L of free chlorine.

e. At the end of a 24-hour period the treated water shall have a residual

of not less than 25 mg/L free chlorine.

f. During the chlorination period all valves and hydrants in the section

being treated shall be operated a sufficient number of times to

thoroughly disinfect the appurtenances.

g. All meters shall be disinfected with the water line except when

otherwise approved by the Contracting Officer.

h. The contractor shall notify the CME three (3) working days prior to

connecting to an existing Navy water line or disinfecting a new or

existing line.

4.2.8.2 Disinfection for Repair and Connections to Existing Lines. Include

following notes in the project specifications or in notes on the drawings.

a. Disinfection procedures for repairs/ connection work shall be as

indicated in AWWA C651 under the paragraph titled “Disinfection

Procedures When Cutting Into Or Repairing Existing Mains” except

that a 5% hypochlorite solution shall be used.

b. All tapping sleeves shall be disinfected as follows:

1. Thoroughly clean the exterior surface of the main to be tapped, the

surfaces of the tapping sleeve and the surfaces of the tapping

equipment that will come into contact with the water.

2. Thoroughly swab the main, the tapping sleeve and the tapping

equipment with a 5% sodium hypochlorite solution.

3. Any surfaces that become contaminated after being disinfected

shall be re-cleaned and re-swabbed as indicated above.

c. After final flushing and prior to placing new lines in service,

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bacteriological tests shall be performed as indicated in AWWA C651

and as follows:

1. Standard Conditions: At least one sample shall be collected from

the end of each new main and one from the end of each new

branch line. In addition, one additional sample shall be collected for

each 4,000 feet of main or branch line. For example: for a 9,000

feet main, 3 samples are required i.e. 2 additional samples and one

sample at the end. The location of the additional samples shall be

determined by the contractor and approved by the Contracting

Officer.

2. Special Conditions: If during construction, trench water has entered

the line or if in the opinion of the Contracting Officer excessive

quantities of dirt or debris have entered the line, samples shall be

taken at intervals of approximately 200 feet and shall be identified

by location.

d. Disinfection of mains and branch lines shall be repeated until samples

show the absence of coli form organisms.

e. Final bacteriological test results, that show the absence of coli form

organisms, shall be provided to the CME at the final inspection of the

project or prior to placing the line in service whichever occurs first. The

location where the bacteriological samples were taken shall be

identified.

f. The contractor shall notify the CME three (3) working days prior to

connecting to an existing Navy water line or disinfecting a new or

existing line.

4.2.9 Cathodic Protection.

Unless specified otherwise, all runs of metallic pipes of 1000 feet or longer

shall be provided with cathodic protection if the field conditions indicate

that such protection is required. If cathodic protection is provided,

polyethylene encasement shall not be provided. Check if the existing

waterline that the project will be connected to has a cathodic protection

system or provisions for such a system, and for existing impressed current

systems in the vicinity of any new waterline. Design the connection point

and new waterlines accordingly.

4.2.10 Coating for Waterlines under Piers.

New waterlines under piers shall have an epoxy-polyamide coating

system conforming to MIL-P-24441. In addition, the word “water” shall be

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stenciled onto the pipe.

4.3 WATER VALVES.

This section covers requirements for water valve installations.

4.3.1 Direction to Open.

The standard direction of opening shall be left (counterclockwise) as

viewed from the top.

4.3.2 Valve Boxes.

Provide a valve box (not buffalo box) for all butterfly valves, for all gate

valves 16” and larger and for those gate valves which have more than 5’

of cover measured from the top of the valve stem to the finish grade.

When such a box is provided, the box shall have a 6” CI frame and cover

over the valve operator to allow operation of the valve from ground level

and the valve shall be NRS type. This latter requirement may not apply to

large valves in meter boxes. These will be treated individually.

4.3.2.1 Painting of Valve Box Covers.

All valve covers shall be painted yellow except that covers for valves

controlling fire hydrants shall be painted white, and covers for valves that

are normally closed shall be painted yellow with a painted red diamond

centered on the top of the cover. Valve box frames shall be painted with

the same color as their cover except for valves that are normally closed,

which shall be painted only red. Mark all covers.

4.3.2.2 Identification Tags.

Provide identification tags for valves, and affix to the underside of all new

valve box or manhole covers. See Figure 4-1.

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Figure 4-1

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4.3.3 Corporation Stops for Valves.

All valves 16” and larger shall be provided with a corporation stop on each

side of the valve.

4.3.4 By-Pass and Gearing.

Gate valves 16” and larger shall be provided with a by-pass and gearing.

4.3.5 Butterfly Valves.

Except where tapping valves are required for all valves 12” and larger

shall be butterfly valves conforming to AWWA C504, CLASS 150B. Valves

shall be short body type with a cast iron body. Provide bypass.

4.3.6 Resilient-Seated Gate Valves.

Except for high pressure water systems and special cases, require that

gate valves 4” to 12” be resilient-seated type, conforming to AWWA C509.

The valves shall also be suitable for throttling and be coated on the interior

and exterior with an epoxy coating. The interior epoxy coating shall be

suitable for potable water use. All buried valves shall be NRS type.

Valves in boxes (non-buffalo type boxes) shall be labeled on the drawings

as to type of operating mechanism i.e. OS & Y or NRS. (Note: these

valves have a working pressure of 200 psi, therefore any references to

150 class valves should be deleted).

4.3.7 Flange Coupling Adapters.

Whenever possible, valves in boxes (non-buffalo type boxes) shall be

provided with flange coupling adapters.

4.3.8 Anchor Blocks.

Reinforced concrete anchor blocks with 316 stainless steel straps and

anchor bolts shall be provided for all valves connected to PVC pipes.

4.3.9 Service Saddles.

When required, service saddles shall be bronze with a 316 stainless steel

double strap.

4.3.10 Backflow Preventers.

An approved backflow prevention device on a service lateral shall be

required if there is a potential for contamination to the NAVFACMAR PW

water supply and distribution system. NAVFACMAR BOSC will determine

the degree of hazard for any new facility.

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4.3.10.1 Testing and Inspection.

Require that all installed backflow preventers be tested and inspected by

the contractor using a certified tester at the time of the tap. Backflow

preventer testing and inspection by the NAVFACMAR BOSC shall be

done on a cost reimbursable basis. Also require that all discrepancies

found shall be repaired at the contractor’s expense.

4.3.11 Fire Hydrants.

Only wet barrel type fire hydrants shall be specified. All fire hydrants shall

be painted yellow, color 13655 of Federal Standard No. 595a.

4.4 WATER METERS.

This section covers requirements for water meter installations.

4.4.1 Meter Requirements.

For billing purposes, all potable water shall be metered for revenue

purposes by either a master meter for the area or by an individual meter

for the facility or site except as otherwise indicated. When a new service

is within an area which already has a master meter, a new meter is always

required if the activity who requires the service is different from the one

who is billed by use of the master meter. Meters are owned and

maintained as a functional part of the water distribution system, as well as

the enclosures, switches,

For each facility/building consuming water, provide water consumption

meters. Meters are owned and maintained as a functional part of the water

distribution system, as well as the enclosures, switches, cabling,

encoders, RTUs, and other accessories that are critical to meter

operation.

The NAVFAC Marianas Advanced Metering (AMI) system is the required

system for utility revenue meters to connect to. The AMI system uses

Modbus/TCP over Cat6 Ethernet and single mode fiber to network all

meters back to centralized servers. New utility revenue meters are

required to be AMI meters, and shall be compatible, configured, and

integrated with the AMI system in conformance to the AMI system

architecture. All projects that will provide a new AMI meter shall include

the following as part of planning, design, and construction:

a. Installation of new or upgraded OSP fiber optic cable infrastructure

from the nearest NCTS wire center to the facility or structure that is

being metered, as needed, to ensure at least two pairs of single mode

fiber are available for use.

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b. Installation of new or upgraded fiber optic cable termination panel,

network switch, enclosure, intrusion detection relay and lock, and

mounting pedestal, at the facility or structure that is being metered, as

needed, to ensure conformance to the AMI system architecture.

c. Installation of new or upgraded meter vault, service pipe, meter

bypass, valves, network cabling and drops, and electrical circuit (must

be homerun to a point that is upstream of any electrical meter), as

needed, to ensure conformance to the AMI system architecture.

d. Installation and commissioning of AMI meter, accessories, and all

other AMI equipment, to also include submission of a change request

form, cybersecurity commissioning as outlined in Section 5, delivery of

AMI system inventory and network diagram documentation updates,

and meter changeover documentation required by the NAVFAC

Marianas UEM billing group.

Provide a test/calibration valve for meter calibration to be checked without

needing to remove the meter. Meters shall be equipped with absolute

encoders and RTUs that are capable of providing consumption and peak

flow data via Modbus/TCP. Configure meter equipment with the nearest

appropriate AMI electric meter so that the electric meter automatically

queries and records consumption and peak flow data via the network.