WWYK263009_65 Design Analysis_Part8.pdf

3.1.4 Lockout/tagout electric service to any foam concentrate pumps (when installed).

3.1.5 Ensure eduction concentrate system (when provided) valves between concentrate tank and educator are locked out/tagged out.

3.1.6 Ensure all water features remain in full service.

3.2 High-Expansion Foam (Hi-Ex) Systems

3.2.1 Lockout/tagout all high-expansion OS&Y water control valves.

3.2.2 Lockout/tagout all control valves on the Hi-Ex concentrate system.

3.2.3 Remove and tagout any solenoid coils from solenoid-operated valves.

3.2.4 Ensure bladder tank (when used) pressurization valves are locked out preventing and pressurization of the bladder prevent under all future operations. Ensure concentrate tank discharge valves are locked out/tagged out.

3.2.5 Ensure eduction concentrate system (when used) valves between concentrate tank and educator are locked out/tagged out.

3.2.6 Lockout/tagout electric service to any foam concentrate pumps (when installed).

3.2.7 Ensure all sprinkler system risers remain in full service.

4. Lock-out/Tag-out Technical Procedures

4.1 For ball valves and wheel handle valves purchase lock-out devices and seal the valves in the appropriate position using aircraft safety wire and seals or plastic seals which must be broken to change the valve position. Available from local industrial and safety supply stores or multiple on-line sources.

4.2 For electrical switches use approved lock-out devices for the specific type of switch or breaker devices and seal the switch in the appropriate position using aircraft safety wire and seals or plastic seals which must be broken to change the switch/breaker position. Typically, available from local industrial and safety supply stores or multiple on-line sources.

4.3 Tag each locked out valve and switch indicating “WARNING - Out of Service or WARNING - Do Not Operate,” date when locked out, craft person who locked out the valve/switch, where to contact before activating/unlocking the switch or valve (typically a 24/7 reporting number like service call).

Tags typically available from local industrial and safety supply stores or multiple on-line sources.

5. System Status

5.1 Ensure using organization(s) and facility managers are aware the foam fire suppression system use has been terminated by the lockout/tagout process. Any tampering with the locked-out/-tagged-out features must be immediately reported to Civil Engineering.

5.2 Ensure fire emergency services update pre-plans and facility inspection records to included computer aided dispatch data bases indicating hangars and other facilities converted to water only protection.

Ensure appropriate installation risk assessment action is taken and documented appropriately at the required authority level.

5.3 Ensure maintenance activities update periodic inspection, test, and maintenance records as appropriate and included a new annual requirement to visually inspect the lockout/tagout devices ensuring valves and switches are sealed in the correct position and indicating there has been no tampering with the system configuration.

5.4 Installations must report each facility when the lockout/tagout process has been completed in the CE Dash, Fire Protection Engineering Workspace, Foam Fire Suppression Data Call at Foam Fire Suppression System Data Call (dps.mil) or https://usaf.dps.mil/teams/10758/FPETeam/SitePages/Foam%20Fire%20Suppression%20System%20 Data%20Call.aspx. Instructions for completing the data call information are found on the site. Users will record the date each facility is lock out and tagged out in the “Comments” field in each facility record. If a facility is not in the existing data installation users will create a new facility data file.

6. Generated Waste

6.1 No waste (foam concentrate, foam solution, rinsate) is anticipated to be generated or released executing this lock out/tag out process.

6.2 In the unexpected chance waste is released, it must be collected and stored in new or previously foam concentrate contaminated drums or totes and stored in the foam equipment room of the facility for remediation under later program guidance. Clean totes can be acquired through DLA. Do not use drums or totes contaminated with any other chemicals.

7. Future Going Forward from Locked Out / Tagged Out

7.1 High expansion foam and low expansion fluorine free foam use is limited to applications as an interim bridging agent pending programming and transition to chemical free protection methods for Tier 1 facilities.

7.1.1 High-Expansion foam protected Tier 1 facilities (Table 1) will continue in-service with high expansion foam until new ignitable liquid drainage floors are programmed and installed; they will be fully maintained IAW UFC 3-601-02.

7.1.2 Low-expansion foam protected Tier 1 facilities (Table 1) will continue in-service with AFFF concentrate until AFFF is replaced with the new Military Specification low expansion fluorine free foam concentrate; they will be fully maintained IAW UFC 3-601-02. 7.2

7.1.3 The locked out/tagged out facilities will be repaired to a uniform risk profile across the DAF using the modernization guidance and prioritization scheme to be included in the next UFC 4- 211-01 change.

For questions or additional information contact the AFCEC Reach Back Center, AFCEC.RBC@us.af.mil.

https://usaf.dps.mil/teams/10758/FPETeam/SitePages/Foam%20Fire%20Suppression%20System%20Data%20Call.aspx https://usaf.dps.mil/teams/10758/FPETeam/SitePages/Foam%20Fire%20Suppression%20System%20Data%20Call.aspx https://usaf.dps.mil/teams/10758/FPETeam/SitePages/Foam%20Fire%20Suppression%20System%20Data%20Call.aspx https://usaf.dps.mil/teams/10758/FPETeam/SitePages/Foam%20Fire%20Suppression%20System%20Data%20Call.aspx mailto:AFCEC.RBC@us.af.mil

APPENDIX 2: DESIGN AND CONSTRUCTION GUIDANCE FOR

INCORPORATING AIR FORCE FOAM SUNDOWN POLICY IN

PROJECTS

This guidance is intended to assist program managers, project designer, and construction managers in applying the revised new aircraft hangar fire protection policy to ongoing aircraft hangar projects. This guidance is structured around the traditional decision points in the design and construction process; however, application is not limited and may be used by project management as necessary. If there is no SAF/IE Tier 1 approval document contained in APPENDIX 1: TECHNICAL LOCKOUT/TAGOUT GUIDANCE FOR , then the hangar is Tier 2. Most hangar projects will be Tier 2 hangar projects, the following guidance will apply based on the current project design or construction status. The Sundown Policy directs no new hangar will enter service with a foam fire suppression system. Since Tier 2 will be the predominant hangar type this guidance will address Tier 2 guidance first:

• Tier 2 – Projects 35% or less design complete, revise to comply with the revised UFC 4-211-01, Chapter 5 criteria.

o Sprinkler – Not less than 0.2 gpm/ft2 over 5000 ft2; DoD (including AF) has been designing to this requirement for many years. There is no change to these long-standing criteria.

o Detection – Do not provided IR detection; delete all optical detection.

o High- expansion foam – Delete all features.

o Trenches – Provide drainage trench at aircraft doors for environmental protection to prevent fluids from escaping the hangar. Trenches are not part of the hangar aircraft servicing area fire protection scheme. AF has been designing to this requirement since 2017.

Design trench capture and out fall rate for aircraft leak/dump rate (gpm) plus 300 gpm for floor wash/rinse. Maximum flow rate will vary based on aircraft. Minimum design trench capture and outfall rate without overflowing is not less than 500 gpm.

• Tier 2 – Projects greater than 35% design complete.

o Sprinkler – Not less than 0.2 gpm/ft2 over 5000 ft2; is what DoD (including AF) has been designing to for many years. There is no change to these long-standing criteria.

o Detection – Delete all IR detection features, as feasible.

o High- expansion foam – Delete all features beyond the manifold header, as feasible.

Modify the manifold header design to remove the high-expansion riser or blind flange the manifold header where the riser connection would have been made.

Delete all foam concentrate storage and eduction/injection features.

Delete all piping and high-expansion generators.

Delete the fire suppression releasing panel intended to activate the high-expansion foam system.

Delete all foam start and stop stations.

o Trenches – Provide drainage trench at doors for environmental protection to prevent fluids from escaping the hangar per existing project design direction. Trenches are not part of the hangar aircraft servicing area fire protection scheme.

• Tier 2 – Awarded Projects in Execution.

o Sprinkler – Not less than 0.2 gpm/ft2 over 5000 ft2; is what DoD (including AF) has been designing to for many years. There is no change to these long-standing criteria.

o Detection – PM’s decision how to modify project to delete all IR detection features if possible and at no cost to the government.

If PM can’t delete, modify to provide evacuation alarm only upon activation of a single detector activation.

o High- expansion foam – PM’s decision how to modify project to delete all features if possible.

When construction of the high expansion foam system has not begun actual installation, modify, if possible, to delete all features and blind flange the high expansion risers at the manifold connection point. Consideration may be given to accepting the components without installation if the Contractor officer approves. Bottom line would be to avoid the installation of these features, if possible, even if components must still be accepted.

In the event features are or must be installed (see guidance for Tier 2 – Projects construction complete following).

Remove the foam start /stop stations and signage after testing. If installed, modify project, if possible, to remove the stations and blank cover the enclosures. Remove the signage. All removed parts must be labeled and packaged for long term storage in the fire protection equipment room.

o Trenches – Provide drainage trench at doors per contract requirements for environmental protection to prevent fluids from escaping the hangar. Trenches are not part of the hangar aircraft servicing area fire protection scheme.

• Tier 2 – Projects construction complete.

o Detection – Must modify to provided evacuation alarm only activation on a single detector activation or if possible, remove all IR detection.

o High-expansion foam – PM’s decision how to modify project. Recommended actions include:

If installed, acceptance discharge testing using foam concentrate and all other testing required in accordance with contract must be accomplished.

Residual foam concentrate remaining post testing should be removed by contractor and no additional foam concentrate of any type is installed in the system.

After required testing, lock out/tag out all high expansion foam eduction system features;

abandon high-expansion features in place.

Remove manual start and stop stations and signs after acceptance testing. Manual start and stop stations may have wires terminated with heat shrink end terminals and blank NEMA 4 enclosures covers installed. All removed parts must be labeled and packaged for long term storage in the fire protection equipment room.

There are no Tier 1 hangars programmed or in design at this time. There is only one Tier 1 hangar in construction currently. The following applies to Tier 1 hangars. The AF Sundown Policy intent is no new hangar should enter service with an operational foam fire suppression system and any new Tier 1 hangar will use ignitable liquid drainage floor assemblies for fire protection. Additional FSS features or modifications unique to special purpose hangars/facilities will be individually evaluated by the Designated FPE.

• Tier 1 – Projects 35% or less design complete. No current projects programmed or in design.

• Tier 1 – Projects greater than 35% design complete. No current projects programmed or in design.

• Tier 1 – Awarded Projects in Execution. Only project in execution is Hangar 21 at Joint Base Andrews.

No change to the installed system. When the system reaches end of life, ILDFA will be programmed to replace existing foam system.

The AFCEC/CO and CF teams can be reached through the AFCEC Reach Back Center afcec.rbc@us.af.mil to address individual issues for specific projects.

mailto:afcec.rbc@us.af.mil

APPENDIX 3: PROGRAMMING GUIDANCE

It is imperative to program projects for Aqueous Film Forming Foam (AFFF) systems and High Expansion Foam Systems (HEFS) elimination to enable Total Force higher headquarters can advocate for funding and make data driven decisions. To develop and program AFFF system and HEFS elimination projects, bases must follow the guidance below after consulting with the design engineers and existing data for AFFF systems and HEFS. Programming repair projects must be completed by 1 March 2023.

Repairs to convert systems will follow decentralized and centralized guidelines. Smaller scope/cost projects will be decentralized unless the value meets the centralized thresholds and will compete for funding under established rules.

At minimum, the following programming database (e.g., NexGenIT) data fields appropriate must be filled in:

project number, title, facility number(s), programmed amount, design FY, execution FY, and time on target date (if applicable).

For fire suppression system (FSS) facility repairs containing AFFF, assume funding is available in FY23 for design and FY24 for execution. If funding does not materialize, projects should move to the following year.

Programmers may program projects in later fiscal years as mission and manpower dictates, however, at minimum, projects must be programmed within a four-year window (FY23-26) to complete a total conversion to water fire suppression systems in facilities by 1 October 2026.

AFFF conversion projects planned as a single acquisition across multiple facilities shall follow umbrella project programming guidance. Programmers will create the umbrella project number, serving as the “parent” project unifying the “child” requirements. Projects for AFFF facilities will include modification or replacement of existing FSS to meet UFC 4-211-01 or interim guidance in APPENDIX 4: UFC 4-211-01 CHAPTER 5 CHANGES DAF FOAM SUNDOWN POLICY. Projects for HEFS facilities will include modification of existing FSS to meet UFC 4-211-01 or interim guidance in APPENDIX 4: UFC 4-211-01 CHAPTER 5 CHANGES DAF FOAM SUNDOWN POLICY. For work accountability (audit readiness), a project number is necessary for each facility. In this situation, the parent project number represents the overall requirement, and each child projects represent the work in each of the multiple facilities. The 2-digit suffix for multiple-facility projects is comprised of the letter “M” and an alphabetic identifier for each included facility. If the parent project is FXSB204567, and includes similar work in separate facilities, the project number of each child will be FXSB204567MA, FXSB204567MB, FXSB204567MC, etc.

All projects are classified as REPAIR work. Though the action is typically stated in the project title, do not take up space in the project title for these projects by adding “Repair” to the front of the title. Reference paragraph PROJECT TITLE NOMENCLATURE below for project title guidance.

There are five common FSS at installations. Below is description of the systems with associate programming scope required to meet the FY2020 National Defense Authorization Act and the Sundown Policy for Foam Fire Suppression Systems. Should an installation have question or concern in determining the type of system and scope required for programming, please contact AFCEC/COSM through the AFCEC Reach Back Center on CE DASH or at afcec.rbc@us.af.mil. After the FSS descriptions, there are specific project title nomenclature requirements that shall be followed.

1. AFFF Systems1 (Low Level nozzle systems without overhead sprinklers) (UFC 4-211-01 para 5-

17.2A)

a. Required programming projects and associated scope:

i. There are no Tier 1 facilities in this category.

ii. For Tier 2 facilities: After the removal and disposal project, this project will repair the existing system and provide an overhead UFC-compliant water-only system.

b. Reference UFC 4-211-01 para 5-17.2 or APPENDIX 4: UFC 4-211-01 CHAPTER 5 CHANGES

DAF FOAM SUNDOWN POLICY for more technical details.

c. Reference PROJECT TITLE NOMENCLATURE section below for project title.

Note 1: If the installation plans to complete a whole hangar/facility renovation which includes FSS repair, the FSS system shall follow scope contained in paragraph ii. Additionally, the installation will still need to program a stand-alone FSS repair project. This will enable HHQs to accurately pull data and accurately requests funds.

2. Fuel Servicing Hangars and HAS/PAS with Legacy Installed Foam Systems1 (UFC 4-211-01 para

5-17.3)

a. Required programming projects and associated scope:

i. After the removal and disposal project, this project will repair the facility by removing existing system and provide an overhead UFC-compliant water-only system.

b. Reference UFC 4-211-01 para 5-17.3 or APPENDIX 4: UFC 4-211-01 CHAPTER 5 CHANGES DAF FOAM SUNDOWN POLICY for more technical details for aircraft hangars and UFC 3-600- 01 for other facilities.

c. Reference PROJECT TITLE NOMENCLATURE section below for project title.

Note 1: If the installation plans to complete a whole hangar/facility renovation which includes FSS repair, the FSS system shall follow scope contained in paragraph i. Additionally, the installation will still need to program a stand-alone FSS repair project. This will enable HHQs to accurately pull data and accurately requests funds.

3. AFFF Systems1 (Foam-water sprinklers with low-level foam nozzles or trench nozzles and foam-water sprinklers without low-level foam nozzles)

a. Required programming projects and associated scope:

i. For Tier 1 facilities: FFF will replace AFFF as part of a centralized contract. The system will be used until end of life. At that point, installations will program the installation of ignitable liquid drainage floor assemblies in lieu of a foam system.

ii. For Tier 2 facilities: After the removal and disposal project, this project will repair the existing system by modifying existing system and provide an overhead UFC-compliant water-only system.

b. Reference UFC 4-211-01 para 5-17.4 or APPENDIX 4: UFC 4-211-01 CHAPTER 5 CHANGES DAF FOAM SUNDOWN POLICY for more technical details.

c. Reference PROJECT TITLE NOMENCLATURE section below for project title.

Note 1: If the installation plans to complete a whole hangar/facility renovation which includes FSS repair, the FSS system shall follow scope contained in paragraph i or ii. Additionally, the installation will still need to program a stand-alone FSS repair project. This will enable HHQs to accurately pull data and accurately requests funds.

mailto:afcec.rbc@us.af.mil

4. AFFF Low Level Nozzles with Water Sprinklers over-head1

a. Required programming projects and associated scope:

i. No Tier 1 facilities are in this category.

ii. For Tier 2 facilities: After the removal and disposal project, this project will repair the existing system by modifying existing system and provide an overhead UFC-compliant water-only system.

b. Reference UFC 4-211-01 para 5-17.5 or APPENDIX 4: UFC 4-211-01 CHAPTER 5 CHANGES DAF FOAM SUNDOWN POLICY for more technical details.

c. Reference PROJECT TITLE NOMENCLATURE section below for project title.

Note 1: if the installation plans to complete a whole hangar/facility renovation which includes FSS repair, the FSS system shall follow scope contained in paragraph ii. Additionally, the installation will still need to program a stand-alone FSS repair project. This will enable HHQs to accurately pull data and accurately requests funds.

5. High Expansion Foam Systems1

a. Required programming projects and associated scope:

i. Currently, there is no requirement to dispose of HEF foam after lock out/tag out. Installations have the option to fund removal if desired. Otherwise leave in place and remove in the future when the FSS undergoes a life cycle repair.

ii. For Tier 1 facilities: This system will be used until end of life. At that point, installations will program the installation of ignitable liquid drainage floor assemblies in lieu of a foam system.

iii. For Tier 2 facilities: This project will repair the existing system by modifying existing system and provide an overhead UFC-compliant water-only system.

b. Reference UFC 4-211-01 para 5-17.10 or APPENDIX 4: UFC 4-211-01 CHAPTER 5 CHANGES DAF FOAM SUNDOWN POLICY for more technical details.

Reference

c. PROJECT TITLE NOMENCLATURE section below for project title.

Note 1: If the installation plans to complete a whole hangar/facility renovation which includes FSS repair, the FSS system shall follow scope contained in paragraph ii or iii. This will enable HHQs to accurately pull data and accurately requests funds.

PROJECT TITLE NOMENCLATURE

Bases must follow the below nomenclature to ensure Higher Headquarters can rapidly and accurately pull project data and associated costs for funding advocacy.

1. AFFF FSS Repair from Foam to Water FSS Project’s Project Title Nomenclature:

• AFFF to Water FSS - BXXX, Facility Type

(Bolded words must be exact. Input installation specific data for non-bolded words.)

o Examples:

AFFF to Water FSS – B949, Haetae Hangar AFFF to Water FSS – B1750, B-2 Mx Hangar AFFF to Water FSS – B19, Fuel Storage Facility

2. HEFS FSS Repair from Foam to Water FSS Project’s Project Title Nomenclature:

• HEFS FSS to Water FSS - BXXX, Facility Type (Bolded words must be exact. Input installation specific data for non-bolded words.)

o Examples:

HEFS FSS to Water FSS - B849, Black Cat Hangar HEFS FSS to Water FSS – B1731, Fuel Mx Dock HEFS FSS to Water FSS – B1234, Fuel Storage Facility

APPENDIX 4: UFC 4-211-01 CHAPTER 5 CHANGES DAF FOAM

SUNDOWN POLICY

(Pending Revision of UFC 4-211-01, 13 April 2017 with Change 3, 20 April 2021)

Replace 5-1 with the following: 5-1 GENERAL Apply Chapters 1, 2, 3, 4, 5 and all Appendices to Air Force projects. This UFC additionally applies to all Air Force RPA hangars. Refer to the Air Force RPA General Maintenance Hangar Facility Design Guide located on the Whole Building Design Guide for additional RPA hangar requirements. Address facility design and construction standards or other technical support questions to the AFCEC Reach Back Center at AFCEC.RBC@us.af.mil.

This UFC contains specific criteria, guidance, and procedures for the phase out of AFFF (PFAS) in accordance with the 2020 National Defense Authorization Act (NDAA) and for the phase out of all foam fire extinguishing agents in Air Force aircraft hangars. The guidance modernizes and standardizes hangar fire protection across the entire Air Force infrastructure enterprise and establishes a unified risk acceptance model for Air Force aircraft hangars.

Insert new 5.1.1: 5-1.1 Implementing Direction

This Chapter provides consolidated technical direction implementing Department of the Air Force Policy requirements in:

• AF/A4 Policy Memorandum, Aircraft Hangar Fire Suppression System Modernization dated 3 June 2019 (completion suspense 30 September 26),

• 2020 National Defense Apportions Act, 19 December 2020, PFAS elimination (completion suspense 30 September 2024),

• SAF/IE Assessment of Risks with Respect to Options for Replacing Fluorinated Aqueous Film Forming Foam (AFFF) Fire Suppression Systems in Department of Defense Facilities, Version 1.0 | July 7,

• SAF/IE Policy memorandum SAF/IE Sundown Policy for Foam Fire

Suppression Systems dated 16 November 2021 with Change 1 13 May 2022 (Programming suspense 7 June 2022; no suspended completion date)

• AF/A4C-2 Memorandum Exemption to UFC 1-200-01 DoD Building Code with

Change 2, UFC 3-211-01, Aircraft Maintenance Hangars, and UFC 4-211-02 Aircraft Corrosion Control and Paint Facilities, to implement Sundown Policy for Foam Fire Suppression Systems, 18 January 2022.

mailto:AFCEC.RBC@us.af.mil mailto:C@us.af.mil

Insert new 5-1.2: 5-1.2 Hangar Classification.

Air Force general purpose aircraft maintenance hangars will be classified in two categories Tier 2 – the default classification, and Tier 1 – critical hangars where loss of the hangar or assets in the hangar will directly impact/reduce the Air Force’s ability to serve national military objectives. Tier 1 designation must be approved by SAF/IE.

Air Force special purpose hangars are unique facilities designed and designated to serve as; Corrosion control hangars (UFC 4-211-02), Aircraft Fuel system Maintenance hangars (this UFC), hangars approved for fuel servicing (this UFC), and hangars approved for integrated combat turns (this UFC). Except as otherwise specified Air Force special purpose hangars will include the additional features covered in this UFC.

[C] 5-1.2 The fire protection and life safety requirements for special purpose hangars are specifically identified in this UFC or other UFCs and while similar to Tier 1 and Tier 2 requirements for general purpose hangars there are variations necessary to meet the unique mission requirements of each special purpose type.

Renumber current 5-1.1 and 5-1.2 to 5-1.3 and 5-1.4

Revise 5-2.2.4 to read: 5-2.2.4 Monitoring System Construction Provide a containment system monitoring panel with a minimum NEMA 250 Type 3 enclosure rating.

Rate any devices, conduits, or electrical enclosures installed below grade for prolonged submersion, minimum NEMA 250 Type 6P. Provide any devices, conduits, or electrical enclosures within the tank for an electrical (hazard) classification of Class I Division 1.

Replace 5-6 thru 5-6.5 with the following: 5-6 FIRE PROTECTION AND LIFE

SAFETY

5-6.1 General

Construct / modify all hangars in accordance with NFPA 409, except were modified by this UFC

5-6.1.1 Tier 1 - General Purpose Hangars

5-6.1.1.1 Flammable Liquids Spill and Fire Control System

New Tier 1 hangars will include a listed ignitable liquid drainage floor assembly (meeting FM Approval Standard 6090) recessed into the concrete floor for new construction.

Modernization and life-cycle upgrade projects in existing Tier 1 hangars will include a listed ignitable liquid drainage flooring assembly (meeting FM approval standard 6090) installed on top of the existing concrete floor slab.

5-6.1.1.2 Fire Sprinkler Protection System.

New Tier 1 hangars will include an automatic sprinkler system, conforming to the requirements of this UFC providing not less than 8 L/min/m2 (0.2 gpm/ft2) over the most remote 464.5 m2 (5000 ft2) design area.

5-6.1.2 Tier 2 - General Purpose Hangars

5-6.1.2.1 Flammable Liquids Spill and Fire Control System

None required.

5-6.1.2.2 Fire Sprinkler Protection System.

Tier 2 hangars will include an automatic sprinkler system, conforming to the requirements of this UFC providing not less than 8 L/min/m2 (0.2 gpm/ft2) over the most remote 464.5 m2 (5000 ft2) design area.

5-6.2 Fire Protection Controls and Notification.

Table 5-1 Sample Air Force Functional Matrix identifies the system operating inputs and expected operating functions expected to occur. This functional must be tailored by the QFPE for the specific project and any additional inputs/outputs included in the matrix.

5-6.2.1 Hangar Servicing Area Fire Alarm Control Unit

Provide a factory assembled listed fire alarm control unit to monitor and control the manual alarm stations and fire suppression systems in the aircraft servicing area.

Listed releasing service units are required in hangars when pre-action or other releasing service is required.

When releasing service is required, provide a 2-position non-key operated switch located within the controls enclosure, when activated inhibits the releasing and notification. When the switch is placed in the inhibit mode/position, only the releasing and alarm functions of controls are disabled while leaving all other functions operational.

[C] 5-6.1.2.1 SAF and HAF have assessed the risk of a flammable liquid fire in a hangar and the potential impact of a fire. It was determined there is only a remote chance of a spill fire and a Tier 2 hangar does not warrant the installation of flammable liquids fire suppression features or flammable liquid spill controls. See the SAF/IE Assessment of Risks with Respect to Options for Replacing Fluorinated Aqueous Film Forming Foam (AFFF) Fire Suppression Systems in Department of Defense Facilities, Version 1.0 | July 7, 2021

Table 5-1: Sample DAF Functional Matrix

ALARM CONDITIONS

REQUIRED

RESPONSE

ANNUNCIATION AT

LOCAL PANEL

NOTIFICATION AUXILIARY FUNCTIONS

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AIRCRAFT SERVICING AREA

MANUAL PULL STATION

IMMEDIATE X X X

PRESSURE SWITCH OR FLOW SWITCH

AIRCRAFT SERVICING AREA SPRINKLER SYSTEM X X X

ONE OR MORE OPTICAL FLAME DETECTOR(S) WITHIN

THE PROTECTED AREA

IGNITABLE LIQUID DRAINAGE FLOOR ASSEMBLY

AUTOMATIC DISCHARGE TO CONTAINMENT X X X X X

ADJACENT / SUPPORT AREA

MANUAL PULL STATION X X

PRESSURE SWITCH OR FLOW SWITCH

ADJACENT/SUPPORT AREA WATER SPRINKLER

SYSTEM

X X

HEAT DETECTION IN THE HANGAR BAY

(IF PROVIDED FOR PRE-ACTION SPRINKLER) X X X X

FLOW DETECTION IN IGNITABLE LIQUID FLOOR

DRAINAGE ASSEMBLY (not maintenance activated/commanded) X X X X

CONTAINMENT HIGH LEVEL ALARM 9WHEN MONITORED

BY THE FIRE ALARM CONTROL X X X

SUPERVISORY CONDITIONS

COMMON SUPERVISORY

2 HOURS FOR

INVESTIGATORS

(can be emergency responders, alarm center runners, maintainers or user representative as directed in local policy guidance)

X X

NITROGEN SYSTEM FAILURE ON PRE-ACTION

SPRINKLER SYSTEMS

X

IGNITABLE LIQUID DRAINAGE FLOOR ASSEMBLY

MANUAL WASH DOWN SYSTEM ACTIVATED

(maintenance activated/commanded)

X X

IGNITABLE LIQUID DRAINAGE FLOOR ASSEMBLY

AUTOMATIC DISCHARGE TO CONTAINMENT (pumps operating when provided)

X X

CONTAINMENT LEVEL EXCEEDS 5% LEVEL INDICATION X X X

PRE-ACTION SUPERVISED SOLENOID

DISCONNECT (IF PROVIDED) X X X

OPTICAL FLAME DETECTION INHIBIT SWITCH

IMPROPERLY POSITIONED VALVE (CLOSED OR OPEN) X X X

TROUBLE CONDITIONS

COMMON TROUBLE

4 HOURS FOR

MAINTAINERS X X

BREAK IN A CONDUCTOR X X

ACCIDENTAL GROUND X X

EDITED BY QFPE: NAME,

ORGANIZATION / DATE

[C] Table 5-1 Do not copy this sample table directly into contract documents and drawings without editing for the specific hangar project.

5-6.2.2 Auxiliary Notification Devices

When an ignitable liquid drainage floor assembly is installed provide blue rotating or flashing beacons not less than 400 cd (120/208VAC) or equivalent 360-degree LEDs.

Control the beacon activation through the ignitable liquid drainage floor assembly control panel. A backup power supply or supervision of the power supply supplying the beacons is not required when supplied from the dedicated fire protection features panel. Mount beacons 20 - 30 ft. (6.1 - 9.1 m) above the floor of the aircraft servicing bay. Provide a sign below each device with 3-inch red letter on a yellow or lime-yellow background, with wording "DRAINAGE FLOOR ACTIVATED". Blue beacons are in addition to any general fire alarm clear visual notification devices.

• For single door hangars, provide one beacon approximately centered on each of the three walls.

• For drive through hangars, provide one beacon 10-25 ft. (3.0-7.6 m) from each corner of the aircraft servicing bay.

Replace 5-11.1 through 5-11.1.3 with the following: 5-11 FLOOR AND TRENCH

DRAINS

5-11.1 Tier 1 – Ignitable Liquid Floor Drainage Assembly

Hangar floor drainage is provided by the listed ignitable liquid drainage flooring floor assembly (FM approval standard 6090) recessed into the concrete floor; no additional drainage or door trench drain is required.

Hangar floor drainage in legacy hangars is provided by the listed ignitable liquid drainage flooring assembly (FM approval standard 6090) installed on top of the existing concrete floor slab; existing door trench drains may remain.

The use of trench drains complying with Section 7.11 of this UFC without the low-level foam-water nozzle system are a permitted alternative to ignitable liquid drainage floor assemblies, when approved by the CFPE.

[C] 5-11.1 Ignitable liquid floor drainage assemblies are an equivalent to foam-based fire suppression systems flammable liquids applications in aircraft hangars. (NFPA 409). The floor assemblies also perform the same function as the trench drains in section 5-2.3;

therefore, in Tier 1 hangars only the floor assembly is required providing fire control/-suppression as well as general purpose and environmental drainage.

5-11.2 Tier 2 – Door Trench Drains

Provide trench drains across the full width at each aircraft movement door for all new Tier- 2 aircraft servicing bays to remove liquid spills, rain water and other fluids. Compressed air, water service lines, ventilation air, and other utilities mounted to the sides of the trench drain are permitted. The floor of the drainage trench must be clear to prevent damming or restricting liquid flow in the trench.

Projects in legacy Tier 2 hangars do not require new or upgraded drainage for fire protection applications. New or upgraded drainage for general purpose or environmental applications is authorized when required by other guidance.

[C] 5-11.2 The SAF/IE Sundown Policy assessment of risk establishes there is not a requirement for the control/suppression of flammable fire events in the majority of aircraft hangars (Tier 2) because of the infrequent occurrence of fuel spills and fire events. Fire control methods including spill fire controls are limited to critical hangars (Tier 1) housing the most critical mission assets and other special purpose hangars identified in this Chapter.

5-11.2.1 Trench Sizing Trench will be sized to accommodate floor rinse water 1136 lpm (300 gpm) and full flow from the aircraft dump valve without overflowing the trench. To allow for sufficient space for maintenance in the trench, consider the volume of piping within the trenches and turning radius of the fittings in the design.

Slope drainage trench inverts at a minimum 1.0% ± 0.5% towards the out fall point(s) from the drainage trench. Capture oily wastewater contaminants from the aircraft servicing area door trench system, as directed by the office overseeing environmental policy for the installation using an oil/water separator or other approved methods.

5-11.2.2 Trench Covers

Provide ductile iron or galvanized steel trench drain design to withstand a minimum proof-load of not less than 50,000 pounds from a tire with a 250-psi pressure or the most critical of the aircraft wheel loads listed in this UFC, whichever is greater.

5-11.3 Floor Drainage Outfall

Floor drainage outfall must be gravity based. Route the outfall from trench drains and ignitable liquid drainage floor assemblies to containment tank/structure unless required otherwise by installation environmental activity.

Pumped outfall to above grade containment tank/structure must be approved by the local environmental activity office and the AHJ. Outfall pumps must be located exterior to the hangar with appropriate weather protection or against an exterior wall within the hangar protected by bollards or chain-link fencing.

[C] 5-11.2.2 The volumes used for trench sizing are intended to prevent these worst-case events from overflowing the drain and compromising the general purpose and environmental function of the drain and do not indicate the trench drain provides any fire control or suppression protection/function. The flow should never be less than 250 gpm rinse water and the aircraft dump flow less than the aircraft specific Technical Order, unless revised by the DFPE.

5-11.3.1 Diversion Valve

When required based on local environmental guidance provide an automatic diversion valve allowing drainage outfall to be directed to an approved waste stream (sanitary, industrial, storm, etc.) or to retention/containment. Control of the diversion valve must be by the ignitable liquid drainage floor assembly control panel.

5.11.3.2 Retention/Containment Capacity

The containment must provide not less than 18,927 l (5,000 gallons) of containment volume plus any required head space for valves and controls. Do not use the trenches, ignitable liquid drainage floor assembly, or piping of the containment system to contain any of the required volume. Discharge of fire sprinkler water, ARFF vehicles and hose streams is not required to be included in the containment volume. Fire events are considered catastrophic events and not planned or routine discharge volumes.

5-11.3.2.1 Tier 1 with ignitable liquid drainage floor assemblies design the containment system to accommodate the anticipated spill volume and a 20-minute operation the ignitable floor assembly flushing water discharge.

5-11.3.2.2 Tier 2 with door trench drains design adequate capacity to contain the maximum fuel spilled from the failure of a single fuel tank/bladder on the anticipated aircraft(s) in the aircraft servicing bay and not less than 20 minutes of floor rinse water discharge.

5-11.3.4 Containment System Monitoring

Provide the containment system with a remote capacity monitoring panel. Provide monitoring panel with audible and visual (yellow strobe or beacon) alarms.

Automatically activate audible and visual alarms when the capacity level exceeds 5%.

Provide a silence switch for the audible alarm. Constantly illuminate visual alarms at the panel until the level condition is returned to normal. Containment system monitoring must be through the ignitable liquid drainage floor assembly control panel or through a separate control panel in the absence of an ignitable liquid drainage floor assembly located in the aircraft servicing area. Provide an alarm to the FACU and Energy Management Control System when the capacity level exceeds 5%.

5-11.3.5 Monitoring System (When Provided)

Provide a containment system monitoring panel with a minimum NEMA 250 Type 4 panel.

Rate any devices, conduits, or electrical enclosures installed below grade for prolonged submersion, minimum NEMA 250 Type 6P. Provide any devices, conduits, or electrical enclosures within the tank for an electrical (hazard) classification of Class I Division 1.

Replace 5-12 with the following: 5-12 AIRCRAFT FUEL SYSTEM MAINTENANCE

HANGARS

Hangars for aircraft fuel system maintenance are special purpose hangars and the requirements of this section apply to Tier 2 hangars used for that purpose. Tier 1 hangars are not anticipated to be used for fuel system maintenance activities. The requirements of this section are based on the hazardous operations being conducted.

Facilities meeting the previous fire and safety requirements for fuel systems repair facilities in accordance with DAF guidelines remain compliant.

Replace 5-12.2 with the following: 5-12.2 Permitted Operations, Fuel systems repair facilities are intended to support the complete range of fuel system maintenance operations normally restricted from being conducted inside other hangars and structures. Normally restricted operations permitted in fuel systems repair facilities include, but are not limited to: fuel cell repair, defuel/refuel/fuel transfer specifically required to achieve a fuel system maintenance objective, de- puddling/purging of fuel tanks/cells for entry, ventilation in preparation for entry, ventilation during entry, and fuel systems components and fuel tank/cell pressurization testing. Facilities complying with this Section are not appropriate for preflight and post-flight fuel servicing operations T.O. 25-00-172; see Section 5-15 for flight related fuel servicing and the related approval process in accordance with DAFI 91-202.

Replace 5-12.4 thru 5-12.4.3 with the following: 5-12.4 Fire Protection Criteria

Provide new fire protection features in accordance with this UFC for Tier 2 hangars. For legacy hangars comply with the requirements of Sections 5-17.1 thru 5-17.10 as appropriate

Replace 5-12,7 thru 5-12.7.1 with the following: 5-12.7 ELECTRICAL

Grounding. Provide sufficient grounding points throughout the facility to include grounding bars in the aircraft servicing bay along the walls with a maximum space of 50 linear feet (15.24 m) and along the walls near tank storage and repair workbenches in the Fuel Foam/Cell Repair Room.

5-12.7.1 Hazardous (Classified) Locations Design hazardous (classified) locations including the fuel cell aircraft servicing bay, fuel bladder/cell repair room, and adjacent spaces in accordance with 3-9.4: Hazardous (Classified) Locations and TO 00-25-172 Ground Service of Aircraft and Static Grounding/Bonding paragraph 1.2.7 for definitions and 4-14 specific requirements and TO 1-1-3 Inspection and Repair of Aircraft Integral Tanks and Fuel Cells.

Design the fuel bladder/cell repair room as a Class I Division 2 hazardous (classified) location to the ceiling/deck in accordance with NFPA 70. At a minimum, classify adjacent spaces not suitability cutoff as defined in 3-9.4 Hazardous (Classified) Locations as Class I Division 2 up to 18 inches (460 mm) above the floor of the fuel bladder/cell repair room. In the aircraft servicing bay, provide wall mounted outlets designed for Class I Division 1 or 2 hazardous (classified) locations throughout all areas.

This is an aircraft maintenance (user) safety requirement and is intended to prohibit the use of unclassified tools or equipment in the classified area around the aircraft.

Replace 5-14 thru 5-14.1.4 with following: 5-14 FACILITIES FOR UNFUELED

AIRCRAFT

Air Force Air Logistics Complexes (ALCs) have programmed depot maintenance (PDM) special purpose hangars where aircraft are disassembled, repaired, maintained, refurbished, and/or returned to flying status. These hangars are dedicated to specific industrial processes as part of the intermediate and depot level maintenance activities.

Air Force Plants (AFPs) are Government-Owned/Contractor-Operated (GOCO) industrial installations have production, fabrication, and test facilities dedicated to specific industrial processes as part of their aircraft production activities. These facilities were constructed in accordance with protection features detailed in NFPA 409 Aircraft Hangars.

5-14.1 Legacy Unfueled Aircraft Hangars

Previously approved unfueled aircraft hangars are considered Tier 2 compliant. Legacy hangars servicing unfueled aircraft with foam fire protection features are modernized in accordance with Sections 5-17.1 thru 5.17.10

5-14.2 New Unfueled Aircraft Hangars

New unfueled aircraft hangars comply with Tier 2 general purpose hangar requirements.

5-14.3 Marking

These facilities must be identified by permanent ANSI or OSHA compliant warning signs indicating “Only unfueled aircraft are permitted to be stored or serviced in this hangar” See UFC 4-211-01 & T.O. 1-1-3. Signs must be not less than 12” wide x 18” tall. Signs must be displayed on the exterior and interior of the hangar at the following locations. The exterior side of the hangar aircraft movement doors within 5 feet of the opening edge. Each interior wall centered along the wall’s length. Signs must be mounted 7 feet to the bottom edge of the sign above the hangar floor or pavement surface. See Figure 5-1: ANSI Warning Sign.

Figure 5-1: ANSI Warning Sign

Replace 5.-15 thru 5-15.8.3 with the following: 5-15 HANGAR REQUIREMENTS FOR

AIRCRAFT FUEL SERVICING

Hangars for fuel servicing for flight operations are special purpose hangars and the requirements of this section apply to Tier 1 and Tier 2 hangars. The requirements of this section are based on the hazardous operations being conducted.

Fuel servicing is prohibited inside of structures by National Fire Protection Association Standard 407, Aircraft Fuel Servicing, Air Force T.O. 00-25-172 Ground Servicing of Aircraft, and NAVAIR 00-80T-109 Aircraft Refueling NATOPS Manual.

5-15.1 Facility Criteria Limitation

Fuel servicing operations inside of new or existing structures must be authorized in accordance with the DAFI 91-202 required SSEA process. Compliance with this UFC’s facility criteria alone is not authority to conduct fuel servicing operations inside of structures. The criteria in this Section are the minimum general facility requirements necessary to apply for evaluation under DAFI 91-202 and T.O. 00-25-172 Ground Servicing of Aircraft for a System Safety Engineering Analysis (SSEA) evaluation for approval of fuel servicing inside structures.

Existing legacy approvals to conduct fuel servicing inside structure are documented in T.O. 00-25-172 Ground Servicing of Aircraft, Table 4-2 and remain valid only as long as the original fire protection, ventilation, and electrical features remain in operation, or the structure has been modernized in compliance with Section.

5-15.2 Separation

Provide a 1-hour fire resistive masonry wall construction between aircraft fuel servicing areas the rest of the building and all other aircraft servicing areas.

Alternative provide 2-hour fire resistive wall of any construction type between aircraft fuel servicing areas the rest of the building and all other aircraft servicing areas.

Combinations of the construction types is not allowed

5-15.3 Electrical

Class I Division2 (CID2) (Zone 2) to not less than the height of highest door.

[C] 5-15.3 Operations alternative in an existing legacy building, provide a shunt trip to de-energize all electrical not required for the fuel servicing operation.

5-15.4 Fueling System

Type V fuel system preferred; in absence of Type V, pantographs inside the hangar supplied by aircraft refueler vehicles connected to a single point connection outside the hangar.

[C] 5-15.1 See T.O. 00-25-172 Table 4-2 for the current list of facilities approved for in structure aircraft fuel servicing operations. Only the specific facility and aircraft type included in the Table in T.O. 00-25-172 are approved. The system safety engineering analysis process is managed by AFMC AFLCMC/SES and AFSEC.

In-hangar fuel servicing criteria is based on a single aircraft in a fire-separated area undergoing fuel servicing in accordance with approved SSEA operating procedures after a formal SSEA and approval process. A System Safety Engineering Analysis (SSEA) is allowed to require additional facility features for specific aircraft, fueling methods, facility types before permitting fuel servicing.

[C] 5-15.1 Under the conditions of pressurized fuel servicing fuel type (AVGAS, JP-4, JP- 5, JP-8, JP-10, and all similar fuels) does not change/modify the requirements of this UFC. This criteria in this UFC is not appropriate/adequate for gaseous or liquefied gaseous fuels, propellants or oxidizers.

[C] 5-15.1 Previous SSEA approvals do not apply to new construction or existing construction not specifically identified in a SSEA report.

[C] 5-15.2. Only one aircraft is allowed in an unseparated location during fuel servicing operations. Exception: SSEA approvals for multiple aircraft under specific combat situations/limitations.

5-15.5 Wall Surfaces

Wall surfaces in direct line with aircraft fuel vents must have an impervious surface unaffected by aircraft fuels and fuel sprays. Concrete, CMU, and metal surfaces painted or unpainted meet these requirements, sheetrock including type X and other moisture resistant types painted or unpainted are not allowed. Other materials must be submitted for DFPE approval

5-15.6 General Fuel Servicing Area Ventilation

Provide ventilation in accordance with this UFC, UFC 3-410-01, and UFC 3-410-04N.

The ability to vary the amount of outside air needs to be in the design. Locate outside air intakes in areas free from contamination. Provide a system capable of ventilating the bay at not less than 1.7 cfm/ft2 during fuel servicing and for a period of time not less than 1 hour following fuel servicing. Ventilate the aircraft servicing bay space at all other times at a minimum ventilation rate of 0.05 cfm/ft2. Control the ventilation system by monitoring the concentration of vapors in the space. The use of photoionization detectors (PID) is the preferred method. The level must be maintained below 100 milligram per meter cubed milligram per meter cubed (mg/m3) (14.4 parts per million (ppm)) for JP-8 per the National Institute of Occupational Safety & Health (NIOSH) recommended exposure limit. During maintenance periods, operate the system to maintain fuel vapor concentrations below 14.4 ppm. A minimum of three monitoring points is required unless the size of the hangar is within the listed coverage of two sensors will adequately protect the space.

5-15.6.1 Emergency Fuel Servicing Area Ventilation

A separate emergency ventilation system will be used to ventilate the aircraft servicing bay in the event of high fuel vapor concentrations in the hangar. The emergency ventilation system will energize to maintain the space at or below 14.4 ppm. The ventilation rate is based on providing a minimum of 20 air changes per hour (ACH) at up to 2 ft. (610 mm) above the finished floor. In aircraft servicing bays with lifts, landing gear pits and recessed inspection areas, locate an additional detector in each below-floor area, and increase the emergency ventilation rate to 30 ACH to ensure proper ventilation and removal of the vapors.

5-15.6.2 Positive Pressure Ventilation

Provide office space, break room, and support equipment/tool room with positive pressure ventilation to prevent vapors and gases from…