Chievres Replace Util_Design Analysis RTA Apr 28 2021 (No appendices).pdf

Ready To Advertise Design Analysis Report

Utility Repair Project (Domestic Water, Fire Protection, and Sanitary Sewer Systems) Chièvres Air Base, Benelux, Belgium

Submitted to

U.S. Army Corps of Engineers Contract W912GB19D0011 Task Order 003

28 April 2021

Submitted by

WSP USA

33301 Ninth Avenue South, Suite 300 Federal Way, Washington 98003-2600

TPF ENGINEERING sa/nv Building Division de Haveskerckelaan 46 B-1190 Brussels (Belgium)

193690-03

Ready To Advertise WSP USA, 193690-03 Utility Repair Project 28 April 2021 Chièvres Air Base, Benelux, Belgium Page ii of iv

UTILITY REPAIR PROJECT

(DOMESTIC WATER, FIRE PROTECTION, AND SANITARY SEWER SYSTEMS)

CHIÈVRES AIR BASE, BENELUX, BELGIUM

TABLE OF CONTENTS

SECTION PAGE

1.0 INTRODUCTION

1.1 Purpose

1.2 Authorization

1.3 Project Description

1.4 Existing Conditions

1.5 Criteria

2.0 DESIGN ANALYSIS

2.1 Civil

2.1.1 Civil Standards and References

2.1.2 Earthwork Standards and References

2.1.3 Sanitary Sewer Standards and References

2.1.4 Storm Drainage Standards and References

2.1.5 Domestic Water Standards and References

2.1.6 Domestic Water – Existing Conditions

2.1.7 Domestic Water – Proposed Conditions

2.1.8 Sanitary Sewer

2.1.9 Storm Drainage

2.2 Fire Protection

2.2.1 Introduction

2.2.2 Project Description

2.2.3 Existing Conditions

2.2.4 Applicable Codes and Standards

2.2.5 Classification of Occupancy

2.2.6 Construction

2.2.7 Interior Finish

2.2.8 Means of Egress

2.2.9 Water Supply and Distribution

2.2.10 Automatic Fire Sprinkler System

2.2.11 Standpipe System

2.2.12 Portable Fire Extinguishers

2.2.13 Fire Alarm System

2.2.14 Fire Department Access

2.2.15 Host Nation Requirements

2.2.16 Fire Protection and Life Safety Conclusion

2.3 Structural

2.3.1 Standards and References

2.3.2 Site Conditions

Chièvres Air Base, Benelux, Belgium Page iii of iv

2.3.3 Fire Protection Water Supply Tank and Pump House

2.3.4 Underground Wastewater Wet Well

2.3.5 Design Loading Criteria

2.3.6 Geotechnical Information

2.3.7 Material Summary

2.4 Landscaping

2.4.1 Standards and References

2.4.2 Plant Material

2.4.3 Irrigation

2.5 Environmental

2.5.1 Standards and References

2.5.2 Environmental Screening Survey

2.6 Permit

2.6.1 Environmental and Construction Permit

2.6.2 Tree Cutting Plan

2.6.3 Soil Survey Report

2.7 Mechanical

2.7.1 Standards and References

2.7.2 Domestic Water

2.7.3 Sanitary Sewer Water

2.8 Electrical

2.8.1 Standards and References

2.8.2 General

2.8.3 Power

2.8.4 Electrical Tie In

2.8.5 Low-voltage Switch Gears

2.8.6 Low-voltage Distribution System

2.8.7 Lighting Systems

2.8.8 Process Control and Operating

2.8.9 Electric Energy Metering

2.8.10 Heating of the Technical Buildings

2.8.11 Lightning Protection and Grounding Systems

2.8.12 Power Supply Systems, Miscellaneous

2.8.13 Signal Communication – Alarms Report from the Technical

Installations

3.0 ACRONYMS AND ABBREVIATIONS

LIST OF FIGURES

Figure 1. Vicinity Map Figure 2: Typical Ion Exchange Configuration Figure 3: Example of a Typical Ion Exchange System with Its Valves System Figure 4: Example of a Typical Configuration for an Underground Pumping

Station Figure 5: Example of Flygt Pump Figure 6: Performance Curves of the Pump Figure 7: Schematic of Proposed Pump

Chièvres Air Base, Benelux, Belgium Page iv of iv

LIST OF APPENDICES

Appendix A DD1391 dated 30 September 2019 Appendix B Environmental Survey Appendix C Geotechnical Report Appendix D Water Flow Tests Appendix E Calculations Appendix F Construction Schedule Appendix G Value Engineering Report, September 28, 2020, v13 Appendix H Meeting Minutes Appendix I Design Clarifications Appendix J Correspondence Appendix K Review Comments Appendix L Code Conflicts and Resolution Appendix M Soil Study Report (French version)

Ready To Advertise Design Analysis WSP USA, 193690-03

Chièvres Air Base, Benelux, Belgium Page 1 of 41

1.0 INTRODUCTION

1.1 PURPOSE

This design analysis provides a basis for project design requirements for the Utility Repair Project (domestic water, fire protection, and sanitary sewer systems) at Chièvres Air Base (CAB) Benelux, Belgium. The design analysis includes written documentation covering general project design parameters, functional and technical requirements, design objectives, design assumptions, and calculations.

1.2 AUTHORIZATION

The U.S. Army Corps of Engineers (USACE) Europe District has authorized the WSP team, under Contract W912GB19D0011 and Task Order 003 W912DW19F0419, to design the repairs to existing utility infrastructure components to meet safety, quality, and service requirements; this includes repairs to the domestic water supply, fire protection, and sanitary sewer systems.

1.3 PROJECT DESCRIPTION

The proposed project will repair utility infrastructure components to meet safety, quality, and service requirements, including repairs to the domestic water supply, fire protection, and sanitary sewer systems. See Figure 1, Vicinity Map.

Figure 1. Vicinity Map

Chièvres Air Base, Benelux, Belgium Page 2 of 41

The domestic water supply system repairs include the following items.

• Upsizing the potable domestic water supply main lines

• Adding point of entry perfluorooctane sulfonate (PFOS) removal through ion exchange systems at the Chièvres and Brugelette connection areas (two locations) to return the Chièvres connection back to operation

• Adding backflow preventers to inhibit unwanted flows into the potable domestic water system

• Repairing water meters

• Repairing service connections, including new service laterals to new gate valves (in manholes) that connect to the existing service mains to the buildings as detailed on the contract plans

• Providing new connection to existing domestic service laterals supplying aboveground fire sprinkler water tanks

The fire protection system repairs include the following items.

• Separating the potable domestic water supply system from the fire protection system

• Upsizing the fire protection water supply distribution and service mains to support fire flows

• Providing sectional valves along the new fire water loop to allow for isolation of underground fire mains in the event of a leak

• Connecting all existing fire hydrants to the new fire water loop

• Adding a pre-fabricated, non-combustible fire booster pump house in the Operations District to include two diesel-drive fire pumps (primary and secondary), complete automatic fire sprinkler system, heating, lighting, ventilation, and an addressable fire alarm system

• Adding a new fire hydrant in the Operations District directly adjacent to the new fire booster pump house

• Adding two aboveground fire water storage tanks to provide adequate on-site fire water supply

The sanitary sewer system repairs include rerouting of force mains and sewage flows to the municipal sanitary sewer treatment facilities in the city of Brugelette, including the repairs to the following items.

• Force main lines

• Force main cleanouts

• Force main connection

Chièvres Air Base, Benelux, Belgium Page 3 of 41

• Wet well/dry well station

• Sewer pump

Additionally, the sanitary sewer repairs include replacement of a segment of the existing sanitary sewer force main conveying effluent from the sanitary sewer lift station located to the west of the hangars in the Operations District toward Gate 13.

All utility system repairs will require significant trenching of utility runs, site restoration, and landscape restoration.

The estimated construction cost (ECC) is below the construction cost limitation (CCL) listed in the Scope of Work, however, three “stand-alone” bid option items have been identified in order to be able to award the construction contract if bids come in higher than the DD 1391 (see appendix A). Bid option 1 includes the removal of all existing valve boxes, valves, etc. Bid option 2 is the construction of the Ion Exchange system and building in the Community Support District at the Brugelette domestic water connection. (Note that the Ion Exchange system and building in the Operations District is in the Base Bid and will be constructed.) Bid option 3 is for the complete construction of the sanitary sewer system repairs including lines, connection, wetwell and sewer pump.

Note that if Bid option 2 is awarded (Ion Exchange system at Brugelette) but Bid option 3 is not, sanitary sewer for the Ion Exchange will need to be connected to the existing sanitary sewer system as identified on the drawings instead of the new system.

1.4 EXISTING CONDITIONS

CAB provides aviation support and other base operations support that is part of U.S. Army Garrison (USAG) Benelux, including the U.S. facilities at Supreme Headquarters Allied Power Europe (SHAPE). CAB is located approximately 40 miles southwest of Brussels and 11 miles northwest of the city of Mons, a primarily agricultural region. CAB is approximately 1,000 acres and comprises four districts:

Airfield, Community Support, Operations, and NATO Special Operations Forces (SOF). The CAB Airfield District occupies approximately two-thirds of the installation and consists of an 8,200-foot Class B runway and a decommissioned runway/taxiway now classified as a landing zone. Most of the land contained within the Airfield District is composed of undeveloped active farm fields that local citizens use through legacy ownership leaseholds and is not part of the scope of this project.

The other three districts, namely the Community Support District, Operations District, and NATO SOF District, are considered “developable” portions of the installation and are the primary focus of the project. The population at CAB is expected to grow because of the increase of personnel and plans to relocate military family housing and select users from other Benelux installations and SHAPE locations to CAB.

1.5 CRITERIA

Per the project DD1391 program documents dated 30 September 2019 (Appendix A), the project is programmed as an FY21 SRM design-bid-build project. All utility

Chièvres Air Base, Benelux, Belgium Page 4 of 41 system repairs will require significant trenching of utility runs, site restoration to include pavement repairs, and landscape restoration of softscape areas.

Additionally, to resolve questions and criteria clarifications during the design process, the design team issued design clarifications (DCs) for USACE and CAB Department of Public Works (DPW) response. These DC responses are documented in Appendix I.

Chièvres Air Base, Benelux, Belgium Page 5 of 41

2.0 DESIGN ANALYSIS

2.1 CIVIL

2.1.1 Civil Standards and References

• UFC 3-201-01 Civil Engineering, with Change 2 Other Codes and Standards

• EN 1992 Eurocode 2, Design of Concrete Structures

• EN 1993 Eurocode 3, Design of Steel Structures

• EN 1996 Eurocode 6, Design of Masonry Structures

• EN 12056, Gravity Flow Drainage Lines within Buildings

• NBN 744 (+A1), Steel pipes for water, gas and sewerage lines

• NBN EN 12201 Plastic piping systems for water supply and connections and sewerage manifolds with pressure - Polyethylene (PE)

• NBN EN 12666 Plastic piping systems for underground non-pressure connections and sewerage manifolds - Polyethylene (PE)

• NBN EN ISO 3126 2005 plastic piping systems - Plastic components - Determination of dimensions

• Walloon Standard Specification Qualiroutes 2012 (edition 1 January 2019 or later) (http://qc.spw.wallonie.be/fr/qualiroutes/index_cctquali.html)

2.1.2 Earthwork Standards and References

• UFC 3 220 01 Geotechnical Engineering

• UFC 3 220-04FA Backfill for Subsurface Structures

• UFC 3 220 Dewatering and Groundwater Control

• Earthwork activities consist mostly of utility trenching

• Royal Decree of 25 January 2001 concerning temporary or mobile construction sites (M.B. 7.2.2001)

• Walloon Standard Specification Qualiroutes 2012 (edition 1 January 2019 or later) (http://qc.spw.wallonie.be/fr/qualiroutes/index_cctquali.html)

2.1.3 Sanitary Sewer Standards and References

• UFC 3-240-02 Domestic Wastewater Treatment, with Change 1

• UFC 3-240-03 Operation and Maintenance (O&M): Wastewater Treatment

• UFC 3-230-03 Water Treatment, with Change 1

• Prescriptions and requirements of the company (Ipalle) managing the municipal sewer infrastructure and municipal wastewater treatment plants (WWTPs) http://qc.spw.wallonie.be/fr/qualiroutes/index_cctquali.html

Chièvres Air Base, Benelux, Belgium Page 6 of 41

• Walloon Standard Specification Qualiroutes 2012 (edition January 1, 2019 or later) (http://qc.spw.wallonie.be/fr/qualiroutes/index_cctquali.html)

2.1.4 Storm Drainage Standards and References

• UFC 3-201-01 Civil Engineering, with Change 2

• Walloon Standard Specification Qualiroutes 2012 (edition January 1, 2019 or later) (http://qc.spw.wallonie.be/fr/qualiroutes/index_cctquali.html)

2.1.5 Domestic Water Standards and References

• UFC 3-230-01 Water Storage and Distribution, with Change 1

• UFC 3-230-02 O&M: Water Supply Systems

• EN 806, Technical Regulations on Potable Water Installations

• EN 1717, Protection against pollution of drinking water in indoor systems and general requirements for backflow protection devices

• NBN EN 805 (2000) Water supply – Requirements for networks outside buildings and their components

• Walloon Standard Specification Qualiroutes 2012 (edition January 1, 2019 or later) (http://qc.spw.wallonie.be/fr/qualiroutes/index_cctquali.html)

• Belgian Federation for the Water Sector, BELGAQUA, 1 May 2016 (or later), Conformity Control of Devices and Appliances to be connected to the Drinking Water Supply Network - Certification of Backflow Prevention Valves and Protections against Contamination of Water intended for human consumption (http://www.belgaqua.be/media/5509/procedures-eng.pdf)

• Société wallonne des eaux (SWDE), New connection to the drinking water supply

– steps to follow and preparatory work

• Prescriptions and requirements of the water distribution company (SWDE)

2.1.6 Domestic Water – Existing Conditions

Currently, CAB purchases water from SWDE, a local municipal water company within Wallonia. CAB receives its water supply at two locations. The first supply point is located at the southeast area of the Community Support District through an existing 200-mm (12-inch) cast-iron distribution main from the city of Brugelette located on the southern side of the Chaussée de Mons. This existing distribution main is tapped approximately 175 meters (575 feet) southwest of Gate 2 for both a 150-mm (6-inch) fire service and 200-mm (8-inch) potable service. From the municipal connection, the lines continue to Pump House B20050 and the water is then distributed throughout CAB. The second supply point is at the northwest area of the Operations District at Gate 13 via a connection to an existing meter. Currently, this supply point is inactive because of detected levels of PFOS that are above maximum U.S. standards.

http://qc.spw.wallonie.be/fr/qualiroutes/index_cctquali.html http://qc.spw.wallonie.be/fr/qualiroutes/index_cctquali.html http://www.belgaqua.be/media/5509/procedures-eng.pdf

Chièvres Air Base, Benelux, Belgium Page 7 of 41

2.1.7 Domestic Water – Proposed Conditions

Supply for the potable water and fire protection will be separate. The first connection will be at the southeast area of the Community Support District. The existing 200-mm (12-inch) cast-iron distribution main that runs from the city of Brugelette has a connecting water service to CAB that runs into an existing vault on the south side of Chausse de Mons. A new 200-mm (8-inch) high-density polyethylene (HPDE) potable main will be connected at the existing vault. All connections will be made in accordance with EN 1717 to comply with necessary backflow prevention. The water will run through a proposed ion exchange treatment system that will ensure water quality standards are met. The ion exchange treatment system is discussed further in the Mechanical section below. After the ion exchange building, the water piping will be separate for domestic water and fire water.

The second connection will be made on the northwest side of CAB, in the Operations District. The existing 125-mm public distribution main runs along Rue de Mons, and the water main to CAB enters through Gate 13. The existing metered connection will be maintained, then the water will be routed into the ion exchange building. The 200-mm (8-inch) potable water line will connect to an ion exchange treatment system to ensure water quality standards are met. The potable water system will create a loop throughout CAB with necessary service lateral stub-outs as required to connect to existing service laterals and supply all facilities. A separate fire main will supply all facilities with necessary stub-outs as required. See Fire Protection section for more details.

2.1.8 Sanitary Sewer

The CAB existing sanitary sewer collection system primarily consists of 150-mm (6-inch) minimum diameter vitrified clay pipe, with some newer pipes consisting of PVC material. The collection system was constructed in the 1940s with more recent expansions in the 1980s.

In the Community Support District, there are nine major structures and one auxiliary structure served by the sanitary collection system, which flows by gravity to the existing WWTP located in Building 20094. Discharge from the WWTP goes to a stormwater retention pond immediately north of the plant. The pond has a relief structure that discharges to the Brune River. Wasted sludge and settled solids are transferred to a concrete underground storage tank and is removed by an outside contractor. The proposed improvements in the CAB Utility Repair Project for the Community Support District include installation of a wastewater pump station and wet well adjacent to the existing WWTP, as well as a force main to redirect flows to the collection system of Brugelette for treatment. The new pump station will provide a pumping capacity ranging from 265 to 378 liters (70 to 100 gallons) per minute.

The wet well will provide a 4-hour peak-flow storage capacity, solids screening or grinder, odor control provisions, and a standby generator.

The Operations District consists of four aircraft hangars and nine additional structures connected to a gravity sewer. All sanitary sewer flows are collected south of Hangar 6 and discharge to a duplex submersible pump station located near Building 20029.

This pump station then discharges to an 80-mm (3-inch) force main to a drop

Chièvres Air Base, Benelux, Belgium Page 8 of 41 manhole near Gate 13. Flow continues by gravity sewer to the city of Chièvres collection system. The pump station near Building 20029 also has a 300-mm (12-inch) overflow connection that discharges to a stormwater retention pond west of the pump station. The pond has a relief structure that discharges to the LaPetite River.

Proposed improvements for the Operations District include installation of a 100-mm (4-inch) force main from the existing pump station’s wet well to a proposed sanitary transition manhole. From the manhole, sanitary effluent will then flow to the Chièvres municipal system via the existing 250-mm (10-inch) gravity sewer.

Additional proposed improvements for the Operations District include rerouting an existing 100-mm (4-inch) sanitary sewer force main to run parallel to the CAB perimeter. The relocated 100-mm (4-inch) force main will connect to an existing 250-mm (10-inch) gravity sewer main that flows to Chièvres.

2.1.9 Storm Drainage

The CAB existing storm drainage system primarily consists of 80-mm- to 1,200-mm-diameter conveyance piping.

The new pump house and ion exchange buildings require storm drainage service piping to convey roof runoff to the existing storm drainage conveyance system. The storm drainage service pipes are 100-mm in diameter. A storm drainage catch basin will be added near the new fire protection tanks to convey the flows from the annual testing of the fire protection tanks.

2.2 FIRE PROTECTION

2.2.1 Introduction

This document describes, in conceptual terms, the fire protection features of the Chièvres Air Base (CAB) Utility Repair Project in Chièvres, Belgium. The purpose of this document is to fulfill the requirements of UFC 3-600-01: 1-7.2.2, which requires that a Fire Protection Design Analysis be provided to discuss the minimum fire protection and life safety features of the project.

2.2.2 Project Description

The CAB Utility Repair Project involves the replacement and upgrade of the existing underground fire protection water loop, which is currently deficient and unable to supply the required fire demand to several portions of the Base. Additionally, the existing underground domestic water loop is being replaced, as well as the sanitary sewer system. Refer to Section 1.3 of this document for more information on project scope.

Two new aboveground fire water storage tanks, each with a capacity of 1,450 cubic meters (383,050 gallons), will be provided. The tanks are sized based on the required fire flow as determined by UFC 3-600-01 and NFPA 1. The tanks will be connected to two diesel-drive fire pumps, each rated for 9,463 L/min (2,500 gpm) at 9.6 bar (140 psi) to boost the available campus fire water pressure. The fire pumps are each sized to provide the required fire flows; one will be the primary fire pump and the other will be the secondary fire pump, at the request of the Authority Having

Chièvres Air Base, Benelux, Belgium Page 9 of 41

Jurisdiction (AHJ). The new fire booster pump house and storage tanks will be located in the Operations District.

2.2.3 Existing Conditions

There are currently two water distribution system supply points to CAB. They are in the Community Support District and the Operations District and water is primarily distributed in dual-purpose (potable and fire service) supply mains.

Currently, only the Community Support District supply point is operational, as a result, CAB receives all its water from the city of Brugelette via a 200-mm (8-inch) water distribution main along the south side of the Chaussee de Mons. The existing Brugelette water distribution main is tapped for both a 160-mm (6-inch) fire connection and 200-mm (8-inch) potable service connection located southwest of Gate 2. The two mains connect in the pump house (Building 20050), which distributes water throughout CAB.

The supply point in the Operations District is supplied from the city of Chièvres. The supply main near Gate 13 is 125 mm (5 inches) and is presently shut off because of detected levels of PFOS, per U.S. standards. This water distribution main connects to a 300-mm (12-inch) water distribution main where it meets Grand Rue in Chièvres, per the accepted final version of the Utility Master Plan and Capacity Study, dated November 2019.

In most cases, existing fire hydrants throughout CAB are connected to the 160-mm (6-inch) underground water loop. Within the Operations District, there is an existing fire pump and underground water storage tank located adjacent to Building 20120 (Headquarters), which supplies the fire hydrant loop around the building.

Additionally, Building 20182 (Personnel Housing) is provided with an existing fire water booster pump for the fire sprinkler system.

Existing automatic fire sprinkler protection is provided in the following buildings.

Community Support District

• Commissary (Building 20200)

• Exchange Main Retail Store (Building 20150)

• Army Lodging (Building 20191)

• Personnel Housing (Building 20182)

• Headquarters (Building 20120)

• Exchange Service Outlet (Building 20005)

SOF District

• Building 20115

2.2.4 Applicable Codes and Standards

This report documents general fire protection features based on the requirements of applicable U.S. codes and standards, notably the Unified Facilities Criteria (UFC) and Host Nation codes and standards. The applicable codes and standards for this project as it relates to fire protection and life safety include the following.

Chièvres Air Base, Benelux, Belgium Page 10 of 41

Unified Facilities Criteria (UFC)

• UFC 1-200-01, Department of Defense (DoD) Building Code, 8 October 2019

• UFC 3-230-01, Water Storage and Distribution, 1 September 2018 with Change 1, 1 October 2018

• UFC 3-260-01, Airfield and Heliport Planning and Design, 4 February 2019

• UFC 3-600-01, Fire Protection Engineering for Facilities, 8 August 2016 with Change 3, 10 May 2019

• UFC 4-010-01, DoD Minimum Antiterrorism Standards for Buildings, 12 December 2018

• UFC 4-021-01, Design and O&M: Mass Notification Systems, 9 April 2008 with Change 1, January 2010

National Fire Protection Association (NFPA)

• NFPA 1, Fire Code, 2018 Edition

• NFPA 10, Standard for the Installation of Portable Fire Extinguishers, 2019 Edition

• NFPA 13, Standard for the Installation of Sprinkler Systems, 2019 Edition

• NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, 2019 Edition

• NFPA 22, Standard for Water Tanks for Private Fire Protection, 2018 Edition

• NFPA 24, Standard for the Installation of Private Service Mains and Their Appurtenances, 2019 Edition

• NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, 2020 Edition

• NFPA 37, Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, 2018 Edition

• NFPA 70, National Electrical Code, 2020 Edition

• NFPA 72, National Fire Alarm and Signaling Code, 2019 Edition

• NFPA 101, Life Safety Code (LSC), 2018 Edition

• NFPA 291, Recommended Practice for Fire Flow Testing and Marking of Hydrants, 2019 Edition

International Code Council (ICC)

• International Building Code (IBC), 2018 Edition – as referenced by

UFC 3-600-01

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Host Nation (Belgium)

• Belgium Royal Decree of the 7 July 1994, with 18 January 2017 revision

• EN 10217-1: 2019, Welded steel tubes for pressure purposes

• EN 10255-M: 2004, Non-alloy steel tubes suitable for welding and threading

• EN 12845: 2015 + A1 (2020), Fixed fire-fighting installations - Sprinkler-type automatic extinguishing systems - Design, installation and maintenance

• Code for Health and Safety in the Workplace, Book III, Title 3 (Codex)

• General Regulation for Protection at Work (ARAB) – Article 52

• NBN EN 54: 2011, Fire Detection and Fire Alarm Systems

• NBN S21-100: 2015 + A1 (2018), Fire Detection and Alarm Systems, Parts 1 and 2

• NBN EN 558: 2017, Industrial valves – Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems – PN and Class designated valves

(When conflict arises between the U.S. and Belgian laws and regulations, the AHJ will review and confirm which will be applicable.)

2.2.5 Classification of Occupancy

The new fire booster pump house is considered a Use Group U, as defined by Section 312 of the IBC. Under LSC, the structure is considered a Special-Purpose Industrial occupancy [LSC: 6.1.12].

2.2.6 Construction

The new fire booster pump house will consist of unprotected, noncombustible (steel) construction. It is classified as Type IIB (IBC) and Type II (000), as defined by the

LSC.

The minimum allowable construction type of the fire booster pump house is based on the height, area, occupancy, open street frontage, and presence of automatic sprinkler protection provided. The allowable heights and areas for a Type IIB building for the given occupancy types are listed in the table below based on IBC Tables 504.3, 504.4, and 506.2.

Group U Permitted Height 22.8 meters (75 feet) Permitted Number of Stories 3 Allowable Area 3,751 square meters (40,375 square feet)

The proposed construction type complies with the applicable height and area limitations.

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IBC: 705.5 requires exterior walls to be fire-resistance rated if required by IBC Tables 601 and 602. The required exterior wall rating and opening protection are based on occupancy and fire separation distance. To determine the fire separation distance, buildings on the same lot are assumed to have an imaginary line between them [IBC: Table 602]. There are no adjacent buildings located within 9 meters (30 feet) of the new fire booster pump house. Therefore, exposure protection is not required.

Buildings whose exterior bearing walls, exterior non-bearing walls, and exterior structural frames are not required to be fire-resistance rated by IBC Table 601 or 602 are permitted to have unlimited, unprotected openings [IBC: Table 705.8]. Therefore, the new fire booster pump house is permitted to have unlimited, unprotected openings.

2.2.7 Interior Finish

Interior finishes throughout the new fire booster pump house must meet the flame spread and smoke development rating requirements of LSC: 40.3.3.2/10.2. Interior wall and ceiling finishes must be Class A, Class B, or Class C. Interior floor finishes in exit access corridors must be Class I or Class II.

2.2.8 Means of Egress

As required by UFC 3-600-01, egress must meet the requirements of the LSC. The calculated occupant load of the new fire booster pump house is determined in accordance with LSC: 7.3.1.2. An occupant load factor of 46.5 gross square meters/person (500 square feet/person) is used and results in an occupant load of two persons.

Travel distance, common path of travel, and dead-end limits for Special-Purpose Industrial occupancies must comply with LSC: 40.2.5/40.2.6, as follows.

Arrangement of Means of Egress Required Dead-End Corridors 15 meters (50 feet) Common Path of Travel 30 meters (100 feet) Travel Distance to Exit 122 meters (400 feet)

A single means of egress is permitted from the fire booster pump house as the exit can be reached with the maximum common path of travel (30 meters [100 feet]) in accordance with LSC: 40.2.4.1.2.

A set of 2-meter-wide (6-foot) doors will be provided with access directly to the exterior. The means of egress must be continuously maintained free of all obstruction (including snow and ice) or impediments to full instant use in the case of fire or other emergency [LSC: 7.1.10.1].

Illuminated exit signs will be provided above the exit doors in the fire booster pump house [LSC: 7.10.1.5]. Emergency lighting will be provided throughout the fire booster pump house, including at the exterior exit doors. Emergency illumination must be provided for a minimum of 90 minutes [LSC: 7.9.2.1]. Emergency lighting

Chièvres Air Base, Benelux, Belgium Page 13 of 41 must provide an initial illumination of at least an average of 10.8 lux (1 foot-candle) and a minimum of 1.1 lux (0.1 foot-candle) along the path of egress at the floor level.

Illumination levels are permitted to decline to not less than an average of 6.5 lux (0.6 foot-candle) at the end of 90 minutes [LSC: 7.9.2.1.2]. Emergency lighting will be provided with battery backup.

2.2.9 Water Supply and Distribution

A new, dedicated underground fire-water distribution system loop will be provided for this project. The new water supply will consist of two aboveground fire water storage tanks, two diesel-drive fire pumps located in the new fire booster pump house, and a 350-mm (12-inch) underground fire water loop that will connect to existing underground fire service laterals and fire hydrants. All new underground fire piping is HDPE.

UFC 3-600-01 classifies underground fire-water piping into three different categories as follows.

• Distribution Main – A pipe that connects the water source (tanks) to Service Mains. [UFC 3-600-01: 2-1.5]

• Service Main – A pipe that transports water from the Distribution Main to the Service Lateral, connects three or more fire hydrants, or a fire pump to more than one building. [UFC 3-600-01: 2-1.37]

• Service Lateral – A pipe that connects the Service Main and terminates at a fire hydrant or Facility. A Service Lateral is a private fire service as defined by

NFPA 24. [UFC 3-600-01: 2-1.36]

The CAB underground fire-water distribution system will be upgraded as necessary to meet UFC 3-600-01 and NFPA 24. The new underground fire loop will be sized to deliver the required fire flow (see below) along any point. Additionally, the new underground fire loop will provide at least 50 percent of the required fire flow (see below) in case of a single break and must not dead-end [UFC 3-600-01: 9-3.2.2]. The new 350-mm (12-inch) fire loop must be sized so that the minimum residual pressure available at 150 percent fire pump rating is not less than 1.4 bar (20 psi) [UFC 3-600- 01: 9-3.2.4] at any point along the Service Main.

Fire Flow The required fire flow has been evaluated in accordance with NFPA 1 (as required by UFC 3-600-01: 9-2 for various buildings on CAB. Per Figures 2.4, 2.5, and 2.6 of the Utility Master Plan and Capacity Study, the required fire flows have been determined for all existing buildings at CAB. Building 20003 (Storage) is 2,450 square meters (26,387 square feet) in gross floor area, of Type II (000) construction, and is not currently provided with automatic fire sprinkler protection. As such, the resulting required fire flow is 13,249 L/min (3,500 gpm) for 3 hours [NFPA 1:

Table 18.4.5.2.1].

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Water Supply Tests Fire hydrant flow testing was conducted on 27 May 2020 by ANPI. Copies of the flow test reports are included in Appendix D. Based on the results of the flow tests, there is not enough available flow (68 cubic meters/hours [300 gpm]) from the existing 200-mm (8-inch) Brugelette connection to supply the fire flow. On the Chièvres side, the available flow (170 cubic meters/hour [750 gpm]) from the existing 125 mm (5 inches) is better than the Brugelette side but is still inadequate to meet the required fire flow. As such, on-site fire water storage tanks are provided.

On-Site Fire Protection Water Storage Tanks The new on-site fire protection water storage tanks must comply with NFPA 22 and UFC 3-600-01. The required volume of the tanks is based on the required fire flow.

As indicated above, the most demanding fire flow is 13,249 L/min (3,500 gpm) for three hours. As such, the calculated required volume of the tank is as follows.

3,500 gpm x 180 minutes = 630,000 gallons (2,385 cubic meters)

However, UFC 3-600-01: 9-4.2.1 requires that the total usable supply stored must be 120 percent of the maximum required fire-water demand. As such, the actual required tank volume is 756,000 gallons (2,862 cubic meters).

To allow for future flexibility should all buildings on CAB be provided with automatic fire sprinkler protection, two fire water tanks, each with a capacity of 1,450 cubic meters (383,050 gallons), will be provided with a common discharge pipe to the new fire pumps.

The new fire water storage tanks must be capable of being self-replenished to their respective required volumes within 48 hours during normal domestic and industrial consumption of the supplying utility [UFC 3-600-01: 9-4.3]. The new aboveground fire-water storage tanks are being located in the Operations District and will be replenished by the new domestic water loop via the connection to the existing Chièvres (city) water supply. Refer to Contract Drawing UT101 for tank locations.

The existing aboveground water storage tanks and fire pumps supplying the fire sprinkler systems in the buildings identified in Section 2.2.3 will be retained as their removal is not included in the scope of work. Each tank will be connected to the new domestic water loop for the purposes of tank refill.

Fire Pumps As the new fire protection water supply is being provided from on-site aboveground storage tanks, a fire pump is required to boost the available system pressures throughout the new underground fire loop around CAB.

As required by the government, the new fire pumps are diesel-driven to coincide with existing fire pumps and concerns the reliability of the electric power source at CAB.

To promote redundancy and minimize system outages, a primary and backup fire pump is required. The design and installation of the new fire pumps are required to meet NFPA 20 and UFC 3-600-01.

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The new fire pumps will be located in a standalone fire booster pump house adjacent to the aboveground fire-water storage tanks in the Operations District. The fire booster pump house is approximately 63 square meters (680 square feet) and sized to provide a minimum 915-mm (3-foot) clearance for access to and in front of all equipment and 150 mm (6 inches) behind the equipment [UFC 3-600-01: 9-5.1.5].

Based on the required fire flow of 13,249 L/min (3,500 gpm) for Building 20003 and Physical Fitness Center (Hangar 4), the new fire pumps are sized to be 9,475 L/min (2,500 gpm) each, as rated pump capacity must not exceed 140 percent of the required system demand [UFC 3-600-01: 9-5.1.7]. The fire pumps will each have a rated pressure boost of 9.6 bar (140 psi).

Refer to Appendix E for preliminary hydraulic calculations indicating the available flow and pressure at various locations along the new underground fire loop.

Fire Hydrants and Sectional Valves Unless otherwise noted below, all existing fire hydrants at CAB must be connected to the new, dedicated underground fire loop. A new fire hydrant is provided in the Operations District adjacent to the new fire booster pump house and is located within 45 meters (150 feet) of the new fire department connection serving the fire booster pump house fire sprinkler system, as required by UFC 3-600-01.

Sectional valves will be provided such that not more than five fire hydrants or service laterals to not more than three buildings are out of service due to a single break [UFC 3-600-01: 9-3.4.3]. As indicated in the Government response to DC0022, all new fire protection sectional valves shall be underground flanged gate valves meeting NBN EN 558: 2017. New sectional valves must open by counter-clockwise rotation of the stem in accordance with UFC 3-600-01.

New service laterals serving fire hydrants must be at least 150 mm (6 inches) in diameter [UFC 3-600-01: 9-3.3.2] and not more than two fire hydrants can be located on a service lateral [UFC 3-600-01: 9-3.3.1].

There is an existing 230 cubic meter (60,760 gallon) aboveground fire water storage tank and fire pump supplying the fire hydrant loop around Buildings 20005 and 20120. Per the Government response to DC0023, the existing fire hydrant loop will be connected to the new fire water loop. DPW will be responsible for disconnection of the existing fire water tank and fire pump supplying the fire hydrant loop; it is not included in the scope of work for the Contractor.

2.2.10 Automatic Fire Sprinkler System

A wet-pipe hydraulically calculated automatic fire sprinkler system will be provided in the new fire pump booster house. As the new fire pumps are diesel-driven, the fire booster pump house will be designed as an Extra Hazard occupancy in accordance with UFC 3-600-01 [NFPA 20: 4.14.1.3]. Intermediate-temperature (93 degrees C [200 degrees F]) standard spray, quick-response upright sprinklers will be provided and spaced at a maximum coverage area of 9.3 square meters (100 square feet).

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The minimum design density is 12 mm/min (0.30 gpm/sq ft) over the entire area of the structure [UFC 3-600-01: Table 9-3]. A hose stream allowance of 1,900 L/min (500 gpm) is required for a duration of 90 minutes [UFC 3-600-01: Table 9-4].

A preliminary hydraulic calculation for the fire booster pump house fire sprinkler system is included in Appendix E.

2.2.11 Standpipe System

A standpipe system is not required for the new fire booster pump house [UFC 3-600- 01: 9-10.2.1].

2.2.12 Portable Fire Extinguishers

Per U.S. codes, general-purpose fire extinguishers are not required in the new fire booster pump house as it is provided with complete, automatic fire sprinkler protection and a fire alarm system [UFC 3-600-01: 9-17.1].

However, fire extinguishers are required by Belgium Royal Decree and will be provided in the new fire booster pump house. A Type 10A-120B:C fire extinguisher will be provided and include a wall bracket.

2.2.13 Fire Alarm System

A fire alarm system will be provided with the new fire booster pump house to monitor the fire pumps, fire-water storage tanks, and the new fire sprinkler system. A mass notification system is not required as the fire booster pump house is not considered an inhabited building, as defined by UFC 4-010-01 [UFC 4-021-01:

2-6.2.1]. The design of the fire alarm system is required to comply with the requirements of NFPA 72, UFC 3-600-01, NBN EN 54, and NBN S21-100. Fire alarm products are required to be in accordance with NBN EN 54 and ‘CE’ marked (Europe) or UL listed (USA).

A new fire alarm control panel (FACP) will be provided in the fire booster pump house. The following fire alarm initiating devices are provided:

• Addressable interface (monitor and control modules)

• Smoke detector (above FACP as required by NFPA 72)

• Manual fire alarm call point (within 1.5 meters [5 feet] of exit doors)

• Carbon monoxide (CO) detector

Occupant notification in the fire booster pump house will consist of both audible and visible signals. Audible signals will be provided by horns using a Temporal 3 signal.

Visible signal will be provided by strobes. The occupant notification scheme will be general evacuation.

CO detection will be provided in the new fire booster pump house for the new diesel-drive fire pumps. Activation of a CO detector must initiate an audible alarm distinctly different from other audible signals in the building [UFC 3-600-01:

9-19.3.2].

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The following will initiate an alarm signal:

• Manual fire alarm call point

• Smoke detector

• Sprinkler water flow switch

• Fire pump run (no activation of fire alarm notification appliances)

• Carbon monoxide detector (distinct “Carbon Monoxide Detector” alarm)

The following will initiate a supervisory signal:

• Valve supervisory (tamper) switches

• Diesel tank low fuel level

• Fire water storage tank high water level

• Fire water storage tank low water level

• Fire water storage tank low water temperature

• Low water temperature in fire storage tanks

The following will initiate a trouble signal:

• Fire booster pump house low temperature sensor

• Fire pump engine trouble

• Fire pump engine overspeed

• Low oil pressure

• Battery charger or battery failure

• Starting contactor coil failure

• Ground fault in fire alarm system wiring

• Open circuit in fire alarm system wiring

• Short in fire alarm system wiring

• Loss of power to FACP

All fire alarm signals will be transmitted to the Base Military Police Station (Building 20134) via the existing underground fiber-optic cable network in accordance with CAB and 2nd Signal standards. The new fire alarm system must be compatible with the existing base-wide system.

All new fire alarm conductors will be installed in accordance with Host Nation wiring protection methods and NFPA 70. Per Host Nation requirements, fire alarm cable must be in accordance with NBN S21-100. New detection, notification, and signaling line circuits are required to be Class B pathways [UFC 3-600-01: 9-18.9.1]. However, Class A pathways will be provided for signaling line circuits based on the Belgium Royal Decree.

Initiating device circuit and signaling line circuit wiring must be solid copper cable in accordance with the manufacturer’s requirements. Copper signaling line circuits and initiating device circuit field wiring must be No. 18 AWG size conductors at a minimum. Visual notification appliance circuit conductors, that contain audible alarm appliances, must be copper No. 14 AWG size conductors at a minimum. Wire size

Chièvres Air Base, Benelux, Belgium Page 18 of 41 must be sufficient to prevent voltage drop problems. Circuits operating at 24 VDC must not operate at less than the listed voltages for the detectors and/or appliances.

Power wiring, operating at 120 VAC minimum, must be a minimum No. 12 AWG solid copper having similar insulation. Non power-limited cables must comply with

NFPA 70.

2.2.14 Fire Department Access

Fire department access to the new fire booster pump house will be provided in accordance with UFC 3-600-01 and NFPA 1. A new all-weather fire department access road will be provided. Refer to Contract Drawing UT101.

The access road must be paved and extend to within 10 meters (33 feet) of the exterior doors [UFC 3-600-01: 9-1.1]. The fire department access road must have an unobstructed width of not less than 6 meters (20 feet), unless otherwise approved by the AHJ [NFPA 1: 18.2.3.5.1.1].

If a dead-end fire department access road exceeds 46 meters (150 feet), approved provisions for the fire apparatus to turnaround are required [NFPA 1: 18.2.3.5.4].

2.2.15 Host Nation Requirements

The following Host Nation requirements are more restrictive than the applicable U.S.

requirements.

• Fire alarm circuits are required to return to the fire alarm panel by Host Nation standards to allow fire alarm functionality given a single fault/break/short in a circuit. UFC 3-600-01 requires only Class B circuits for this project.

• A portable fire extinguisher is required in the new fire booster pump house by the Belgium Royal Decree.

• The ambient temperature of the new fire booster pump house is required to maintain 10°C (50°F) in accordance with EN 12845.

2.2.16 Fire Protection and Life Safety Conclusion

The fire protection and life-safety design narrative is provided to ensure compliance with the applicable U.S. and Host Nation codes and standards for fire protection and life safety.

2.3 STRUCTURAL

2.3.1 Standards and References

• UFC-1-200-01 General Building Requirements, 1 October 2019

• UFC 3-301-01 Structural Engineering, 1 October 2019

• UFC 4-010-01 DoD Minimum Antiterrorism Standards for Building, 12 December 2018

• International Building Code, 2018 Edition

• ACI 318-14/ACI 318R-14 Building Codes Requirements for Structural Concrete

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• ACI SP-66 ACI Detailing Manual, 29 June 2015

• AISC 360-16 Specifications for Structural Steel Buildings

• AISC 341-16 Seismic Provisions for Structural Steel Buildings

2.3.2 Site Conditions

The project site is in a region known to not be seismically active. A geotechnical engineering report was prepared based on evaluation of the site soils that was conducted and is included as an appendix. Based on the geotechnical report, the bearing pressure at the surface is 40 KPa.

Due to the high load demand required for the project, particularly at the water tank area, a deep foundation is necessary. An 800 mm (31-inch diameter) approximately 10 meter (33 feet) deep auger cast pile foundation is used to support the fire protection water supply tanks.

2.3.3 Fire Protection Water Supply Tank and Pump House

With the upgrade to the fire protection system, the water supply needs to be increased. At the northeast area of the project, two large flat-bottom steel water tanks and a pump house will be constructed to accommodate these increased demands. The tanks are 13.837 meters (45 feet) in diameter and 10.2 meters (33 feet) tall, with a capacity of 1,450 cubic meters (383,049 gallons). The tanks will bear directly on a reinforced concrete mat supported by 800-mm-diameter (31-inch-diameter) reinforced concrete augur cast pile foundation. The tanks shall be prefabricated steel tank. All components of the water tanks shall be provided by the contractor, including the anchor design, and is identified as part of the deferred submittals.

The pump house is a prefabricated building with a minimum dimension of 7 by 8 meters (23 by 26 feet) in plan and 3.5 meters (11.48 feet) tall anchored into its own mat foundation located between the two water tanks. Pump house equipment is expected to be on skids anchored into the mat foundation. Structural and architectural features of the pump house shall be included as deferred submittals and shall be reviewed and approved to meet the required loading specifications.

The two cast-in-place reinforced concrete mat foundations are expected to be

1.50 meters (5 feet) thick with a plan dimension of 18 meters x 18 meters (59 feet x 59 feet). The proposed pile dimension is provided but we expect that the pile foundation contractor will provide a more site specific design that will adequately fit the actual geotechnical condition in the area.

2.3.4 Underground Wastewater Wet Well

An underground cast-in place reinforced concrete wastewater wet well will be constructed on the northeast side of the project. The proposed location is on the north side of the existing WWTP. Location was proposed to minimize effect on the existing treatment plant while in operation during construction.

However, this consideration will require mitigation for the existing trees.

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The wastewater wet well will have an approximate plan dimension of 9-meter by 7-meter (30- by 23-foot) area. Depth of the wet well is approximately 8 meters (26 feet) below the existing finish grade level. This is due to the lowest elevation of the outfall and the required tank storage capacity. The wet well will have 600-mm (24-inch) cast-in-place reinforced concrete side walls with a minimum 600-mm (24-inch) cast-in-place reinforced concrete slab roof. The wet well will have an overall height of 5.1 meters (17 feet).

A steel metal grating platform for maintenance is supported by steel members attached to the concrete walls. Maintenance access manholes, as well as removable lid for equipment servicing, is provided.

2.3.5 Design Loading Criteria

All concrete structures shall be analyzed based on the Load Resistance Factor Design.

• Self-Weight Dead Loads (SW) The dead load contributed by the self-weight of the structural members are calculated by the software from actual volume and material density of the sections under analysis.

• Superimposed Dead Load (SDL) Superimposed dead loads refer to “permanent” loads that are not contributing to the structural strength of the structure but are not expected to be relocated during the normal life of the structure, such as pipes, ceilings, and floor finishes.

Superimposed Dead Load (SDL) kg Building Point Load Comments Fire Tank 1540500 Pump House 14500

• Live Loads (LL) and Roof Live Loads (RLL)

Uniformly Distributed Live Loads and Roof Live Loads (LL and RLL) kPa Occupancy Use Area Load Comments

Roof 0.96 Mechanical 9.6

• Snow Load…