240176_ATT01_Design Narrative_Amendment 2.pdf

Design Narrative_v3_05/02/23

CUI

Design Narrative

Replace Industrial Waste Lift Stations 6n & 6S, B62501

Project Number: WWYK240176 Work Order: 15311657

Tinker Air Force Base, Oklahoma

August 6, 2026

Prepared By:

Tepa Companies 7535 5th Street, Building 400 Tinker AFB, OK 73145

Design Narrative WWYK240176 - Replace Industrial Waste Lift Stations 6n & 6S, B62501 i | August 6, 2026

CONTENTS

1. Overview

2. Applicable Codes and Standards

2.1 General

2.2 Civil

2.3 Architectural

2.4 Structural

2.5 Mechanical / Plumbing

2.6 Electrical

3. Civil Design Narrative

3.1 Existing Conditions

3.2 Design Approach

3.3 Grading and Drainage

3.4 Environmental Management (EM) Survey

3.5 Design Considerations and Assumptions

4. Structural Design Narrative

4.1 General Design Parameters and Assumptions

4.1.1 Concrete and Reinforcing Steel

4.1.2 Reinforced Concrete Design

4.1.3 Structural Steel

4.1.4 Steel Design

4.1.5 Structural Loads

4.2 Structural Demolition- N/A

4.3 Structural Construction- N/A

5. Mechanical / Plumbing Design Narrative

5.1 General Design Parameters and Assumptions

5.1.1 Elevation, Latitude/Longitude, Climate Zone

5.1.2 General Indoor Temperature/Relative Humidity Parameters: N/A

5.2 Building HVAC Loads: N/A

5.3 Indoor Air Quality: N/A

5.4 Validation of Existing HVAC Systems: N/A

5.5 Life Cycle Cost Analysis (LCCA)

5.6 Demolition

5.7 Mechanical Construction

5.7.1 Industrial Waste Lift Station

5.7.2 Vibration Control – N/A

5.7.3 Energy Conservation

5.7.4 Controls

5.7.5 System Commissioning, Testing and Balancing

Design Narrative WWYK240176 - Replace Industrial Waste Lift Stations 6n & 6S, B62501 ii | August 6, 2026

6. Electrical Design Narrative

6.1 General Design Parameters and Assumptions

6.2 Electrical Demolition

6.3 Electrical Construction

APPENDICES

Appendix A: Acronyms and Abbreviations

Appendix B: Civil Calculations and Cutsheets Appendix C: Architectural Calculations and Cutsheets Appendix D: Structural Calculations and Cutsheets Appendix E: Mechanical / Plumbing Calculations and Cutsheets

Appendix F: Electrical Calculations and Cutsheets Appendix G: Fire Protection Calculations and Cutsheets

1 | August 6, 2026

1. Overview This project replaces the existing Industrial Waste Lift Stations 6N and 6S at Building 62501 with a new system that meets current standards and provides reliable service. Work includes removing the existing stations, installing new lift station equipment and valve vaults, and connecting them to the existing industrial waste system. Mechanical upgrades include a new wet well, new submersible pumps, containment piping, and improved screening to manage future flows, and maintenance needs. Site grading and drainage improvements will support the new installation. Electrical upgrades will include new controls, power improvements, and integration with the base monitoring system.

Construction will be sequenced to keep one lift station in service at all times and minimize disruptions.

2. Applicable Codes and Standards

2.1 General

• ICD/ICS 705 Technical Specifications for Construction and Management of Sensitive Compartmented Information Facilities

• IBC International Building Code (as amended by UFC 1-200-01)

• IEBC International Existing Building Code

• NFPA 101 Life Safety Code

• TAFB Facility Standard

• UFC 1-200-01 DoD Building Code

• UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings

• UFC 4-010-05 Sensitive Compartmented Information Facilities Planning, Design, and Construction

2.2 Civil

• FAA Advisory Circular 150/5340-1L

• BASH Manual

• UFC 3-201-01 Civil Engineering

• UFC 3-240-01 Wastewater Collection and Treatment

• UFC 3-230-01 Water Storage, Distribution, and Transmission

• UFC 3-250-01 Pavement Design for Roads and Parking Areas

• UFC 4-022-02 Security Fences and Gates

2.3 Architectural

• ABA Architectural Barriers Act Standards

• UFAS Uniform Federal Accessibility Standards

• UFC 3-101-01 Architecture

• UFC 3-110-03 Roofing

• UFC 3-120-10 Interior Design

• UFC 3-190-06 Protective Coatings and Paints

• UFC 3-201-02 Landscape Architecture

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2.4 Structural

• ACI 318-14 Building Code Requirements for Structural Concrete and Commentary

• AISC 360-10 Steel Construction Manual, 14th Ed.

• ASCE 7-10 Minimum Design Loads for Building and other Structures

• AISI S100-12 North American Specification for the Design of Cold-formed Steel

Structural Members

• UFC 3-301-01 Structural Engineering

• UFC 3-310-01 Seismic Design of Buildings

2.5 Mechanical / Plumbing

• ANSI/ASHRAE/ Peak Cooling and Heating Load Calculations in Buildings Except ACCA Standard 183 Low-Rise Residential Buildings

• ASHRAE 55 Thermal Environmental Conditions for Human Occupancy

• ASHRAE 62.1 Ventilation for Acceptable Indoor Air Quality

• ASHRAE 90.1 Energy Standard for Buildings Except Low-Rise Residential

Buildings

• IECC International Energy Conservation Code

• IMC International Mechanical Code (as amended by UFC 3-410-01)

• IPC International Plumbing Code (as amended by UFC 3-420-01)

• TAFB Mechanical Standard

• UFC 3-401-01 Mechanical Engineering

• UFC 3-410-01 Heating, Ventilating, and Air Conditioning Systems

• UFC 3-410-02 Direct Digital Control for HVAC and Other Building Control

Systems

• UFC 3-410-04 Industrial Ventilation

• UFC 3-420-01 Plumbing Systems

• UFC 3-430-01FA Heating and Cooling Distribution Systems

• UFC 3-450-01 Noise and Vibration Control

2.6 Electrical

• NFPA 70 National Electrical Code

• NFPA 780 Standard for Installation of Lightning Protection Systems

• TAFB Electrical Standard

• UFC 3-501-01 Electrical Engineering

• UFC 3-520-01 Interior Electrical Systems

• UFC 3-530-01 Interior and Exterior Lighting Systems and Controls

• UFC 3-575-01 Lightning and Static Electricity Protection Systems

• AFMAN 32-1065 Grounding and Electrical Systems

3 | August 6, 2026

3. Civil Design Narrative The civil requirements for the project include (but are not limited to):

• Demolish and remove the existing lift station structures.

• Prepare the site to accommodate the installation of new lift stations and valve vaults.

• Coordinate with existing utilities to avoid conflicts during construction.

• Provide stable, properly graded surfaces around the new structures.

• Improve drainage and maintenance access.

• Minimize service interruptions during tie-in activities.

3.1 Existing Conditions

The project area includes two existing industrial waste lift stations, 6N to the north and 6S to the south, both located within a fenced area. Lift Station 6N currently receives the majority of the industrial waste flow, while 6S only receives a smaller tributary amount. The site is mostly covered with grass and enclosed by fencing, with gravel access provided to 6N. Drainage generally flows away from the lift stations, though some localized grading improvements are needed to prevent ponding.

3.2 Design Approach

The civil design focuses on rerouting the flow from Lift Station 6S into Lift Station 6N, then removing the old lift stations and installing a new lift station at the former 6S location. The flow reroute will be completed first to maintain continuous system operation. After rerouting, 6S will be demolished, and the existing pit will be reused for the new lift station. Once the new lift station is operational, 6N will be demolished.

3.3 Grading and Drainage

Grading will be designed to provide positive drainage away from the new lift station areas, avoiding low spots and ponding. Concrete pads will be constructed around the new lift stations and valve vaults to provide stable bases and improved maintenance access, while gravel walkways will be added to further support operations.

3.4 Environmental Management (EM) Survey

During the demolition of the industrial waste station, it is presumed that asbestos-containing materials (ACM) and/or lead-based paint (LBP) will be present. The contractor is required to test for these materials once they are exposed. If the contractor encounters any suspect environmental conditions at any time, they must immediately notify the Contracting Officer (CO) and the Contracting Officer's Representative (COR).

An EM survey indicates there are no asbestos containing materials (ACM), heavy metals (HM or lead based paint (LBP) concerns for area(s) where work is to be performed. If at any time the Contractor encounters suspect environmental conditions, they shall notify the CO and the COR.

(a) Any dewatering needs to be pumped and hauled to the IWTP

(b) Any excavation needs to be stored in a lined container, tested, and disposed of in accordance with the sampling results. (Ref. Tinker Hazardous Waste Management Plan).

If at any time the Contractor encounters suspect environmental conditions not identified above, they shall notify the CO and the COR.

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3.5 Design Considerations and Assumptions

Utility records and topographic data will be verified in the field before final design to confirm accuracy. Existing soils are assumed to have adequate bearing capacity for proposed structures.

Dewatering may be required during excavation depending on groundwater conditions.

Construction will be sequenced so that at least one lift station remains operational at all times.

All work will comply with UFC 3-201-01 (Civil Engineering), UFC 3-230-01 (Pumping Facilities), UFC 3-240-01 (Wastewater Collection and Treatment), EPA regulations, and Tinker AFB design standards.

4. Structural Design Narrative

4.1 General Design Parameters and Assumptions

4.1.1 Concrete and Reinforcing Steel

• Structural Cast-In-Place Concrete, Unless Otherwise Indicated: 4000 psi.

• Concrete for Paving, Sidewalks, slab-on-grade, and Other Flatwork: 4000 psi

• Cement: Type II or I/II for cast-in-place concrete.

• Reinforcing Steel (Deformed Bars): ASTM A615, Grade 60.

• Reinforcing Steel to Be Welded (Deformed Bars): ASTM A706, Grade 60.

• Anchor Bolts: ASTM F1554, Gr 36, Galvanized.

4.1.2 Reinforced Concrete Design

Design of Slab-On-Ground: Slabs-on-ground shall be designed in accordance with ACI 360R-10 and

ACI 318-14.

4.1.3 Structural Steel

• W and WT Shapes: ASTM A992 or ASTM A572, Grade 50, with special requirements per AISC Technical Bulletin #3.

• Other Rolled Sections and Plates: ASTM A36 or ASTM A572, Grade 50.

• Square or Rectangular Tubes (HSS): ASTM A500, Grade B.

• High Strength Bolts: ASTM A325, with compressible washer type direct tension indicators or twist of type tension control bolts.

• Anchor Bolts: ASTM F593, Type 304.

4.1.4 Steel Design

Structural steel design will be performed in accordance with the requirements of the American Institute of Manual Steel Construction (14th Edition), AISC 360-10.

4.1.5 Structural Loads

4.1.5.1 Dead Loads

Dead loads will be considered resulting from fixed construction, materials, and equipment. Dead loads will be determined and applied in accordance with ASCE 7-10, and other pertinent standards and vendor-supplied information.

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4.1.5.2 Live Loads

Live loads are those loads produced by the use and occupancy of the building or structure, and do not include loads such as wind/seismic loads, rain loads, flood loads, or dead loads. Minimum uniformly distributed live loads will be as required by

ASCE 7-10.

4.1.5.3 Wind Loads

General: Wind loads for structural design of main wind force resisting systems and components and cladding shall be determined and applied in accordance with ASCE 7- 10, Directional procedure.

Wind Speed: The minimum 3-second gust design wind speed shall be determined from Figure 26.5 of ASCE 7-10. A basic wind speed of 120 mph will be appropriate for the project location.

Exposure Category: Building exposure classification C, as defined by ASCE 7-10, shall be used for this building.

Risk Category: Building risk category IV, as defined by ASCE 7-10, shall be used for this building.

4.1.5.4 Load Combinations

Load combinations using strength design and service-level combinations shall be as defined in ASCE 7-10.

4.1.5.5 Seismic and Snow Loads

Seismic loads shall be determined in accordance with IBC 2015. The structure will be designed as Seismic Design Category of “C” based on the seismic parameters defined in

IBC 2015.

Snow loads shall be determined in accordance with IBC 2015. The ground snow load shall be 10 pounds per square foot.

4.2 Structural Demolition- N/A

4.3 Structural Construction- N/A

5. Mechanical / Plumbing Design Narrative The mechanical requirements for the project include (but are not limited to) Industrial Waste Lift Station (IWLS), Industrial Waste Valve Vault (IWVV), and Meter Vault (MV):

• Installation shall be designed and constructed IAW UFC 3-420-01 Plumbing Systems, UFC 3-240-01 Domestic Wastewater Treatment, and the TAFB Mechanical Standard.

• Provide sump of approximately 5,000-gallon capacity (10’ diameter X 22’ depth) with three submersible pumps for 3” spheres, DOR to confirm 100 GPM, 10 HP pumps with N+1 system redundancy. Pump flow rate to ensure 2 ft/sec in outlet piping. Provide inlet strainer basket compatible with pump flow rate and strainer mesh size for current influent paint chip size.

6 | August 6, 2026

• Provide flow meter on pump discharge piping in new meter vault on each IW pipe that routes to the IWTP.

• Provide piping of existing size and configuration to include containment to and from all inlet sources to 6N & 6S to new IWLS. Connect to existing IW piping from new IWVV with containment piping. Connect existing outlet piping with containment to the IWVV.

Configure piping to use either pipe to the IW Treatment Plant.

5.1 General Design Parameters and Assumptions

5.1.1 Elevation, Latitude/Longitude, Climate Zone

Elevation, latitude/longitude, and climate zone were taken from International Energy Conservation Code 2015. Weather data below was taken from UFC 3-400-02 and 2021 ASHRAE Fundamentals Chapter 14.

• Elevation: 1,260 ft.

• Latitude: 35.42 N

• Longitude: 97.38 W

• Climate Zone: 3

• Summer: 100°F DB/74°F WB

• Winter: 13.9°F

5.1.2 General Indoor Temperature/Relative Humidity Parameters: N/A

5.2 Building HVAC Loads: N/A

5.3 Indoor Air Quality: N/A

5.4 Validation of Existing HVAC Systems: N/A

5.5 Life Cycle Cost Analysis (LCCA)

Submersible pumps are the most applicable type of pumps for this service.

Based on the information above, an LCCA was not performed for this project.

5.6 Demolition

Removal of the existing pumps and piping within each sump 6N & 6S.

5.7 Mechanical Construction

5.7.1 Industrial Waste Lift Station

Install three (3) submersible pumps in 10’ diameter by 22’ deep FRP (Fiberglass Reinforced Plastic) sump with rail system. Pump system to provide N+1 criteria to maintain two working pumps.

Provide piping to route through either existing 6” IW to the IWTP with check valves, shut-off valves, and flow metering.

5.7.2 Vibration Control – N/A

5.7.3 Energy Conservation

The following energy conservation measures are being used on this project.

• Pump motor VFD with integral bypass for soft start purposes.

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5.7.4 Controls

Local control will be provided on all new submersible pumps. Pumps will be controlled by packaged pump effluent level control system.

The direct digital controls will be tied into the base side COINe (Community of Interest Network Enclave) and Honeywell EBI DDC system located in B2136 to allow monitoring and troubleshooting remotely as well as at the facility under a sperate contract.

5.7.5 System Commissioning, Testing and Balancing

Provide commissioning of work designed/constructed under this project. Also provide to a firm certified by the Associated Air Balance Council (AABC) or National Environmental Balancing Bureau (NEBB) to perform the testing, adjusting and balancing procedures of air side and water side systems per the requirements of the AABC or NEBB Procedural Standards for Testing, Adjusting and Balancing of Environmental Systems.

6. Electrical Design Narrative Electrical design shall confirm the following:

• Number and size of pumps (gpm, horsepower, and electrical demand in kilowatts)

• Location(s) or the Equipment Rack and associated electrical box(s) above grade or in the vault(s).

• Verify that the existing emergency power system with automatic transfer switch systems for alternative power generation and distribution in an emergency can support the new operations.

• Provide a motor starting analysis and maximum short circuit calculations. Lists maximum short circuit amperage on the drawings and specifies the method of calculation in accordance with Tinker AFB Standards.

• The design engineer shall specify a power system study and ARC fault labeling according to Tinker AFB Standards.

• Preform electrical cable testing on the existing cables’ performance, insulation conductivity, and safety under the various electrical conditions for this lift station upgrade.

6.1 General Design Parameters and Assumptions

The existing electric service for Industrial Waste Lift Station 6N & 6S (Facility B62502) is fed from Panel MDP 2119-PNL-6, which is a 480/277 Volt, 3 Phase, 100 Amp Service (Circuit 1, 3, 5) in (Facility 2119). This panel is on an Emergency Generator.

All enclosures shall be stainless steel 316 (or equal), rated NEMA 4X with level door closures and aluminum dead-front covers. The pump control enclosure shall be of the double door type to locate all 480V equipment on one side and all 120V equipment on the other side. Include a Wiring Color Scheme.

All panels shall have a factor enamel finish.

Conductors for power shall be stranded copper, rated at 75 degrees (C), with insulation suitable for both dry and wet locations. Conductors sizing is to be done in accordance with NEC requirements. Power conductors shall be continuous with no field splices allowed.

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Wire size for controls shall be #14 AWG copper stranded rated for 90 degrees (C). Wire size for Supervisory Control and Data Acquisition (SCADA) controls shall be #16 AWG cooper stranded rated for 90 degrees (C).

Due to the potential presence of corrosive gases, greases, oils and other constituents present, all mounting hardware shall be type 316 stainless steel and seal-offs are to be installed in conduits leading to the pump control panels and junction boxes. All enclosures and disconnects shall be padlock lockable.

The electrical disconnect for the NEMA 4X, stainless steel enclosure. Provide with fusing class size based on the characteristics of the motor loads served and the available fault current.

Provide a surge arrestor in a separate NEMA 4X, SS316 enclosure.

Electrical equipment shall comply with the latest version of the NFPA National Electrical Code (NEC) requirements for Class 1, Group C and D, Division 1 locations. Additionally, equipment located in wet wells shall be suitable for use in corrosive environments. Flexible cable is to be provided with watertight seals and separate strain relief. High water float switches shall be normally open and will be of the non-mercury type.

All electrical equipment and connections located in wet wells and dry wells shall be rated for Class 1, Division 1 service and shall be explosion-proof.

Any underground electrical conduits shall be gray, rigid nonmetallic conduits. Field-manufactured bends are not acceptable. Only fabricated conduit bends are allowed. Buried conduit shall have a cover depth not to exceed 18 to 24 inches. All exposed conduits shall be rigid aluminum.

Motors shall be controlled with variable frequency drives (VFDs) with communication module as specified by Honeywell.

VFDs must be rated for operation at temperatures equal to 50 degrees (Centigrade) or higher.

Consider soft starters in lieu of VFDs; pending review and approval during the pre-design meeting. Coordinate with Mechanical Design.

When VFDs are used, the pump control panel must be insulated and provided with a closed loop, climate controlled with appropriate air conditioning.

Grounding systems shall have a maximum ground resistance per NEC. The Design Engineer will incorporate special soils, such as graphite compounds if needed to improve ground resistance capabilities.

Special considerations for submersible stations include the following:

Design the electrical system, control, and alarm circuits to allow for disconnection outside the wet well. Terminals and connectors shall be protected from corrosion by location outside the wet well in a NEMA 4X stainless steel enclosure.

Locate the motor control center outside the wet well, readily accessible and protected by conduit seals to prevent the atmosphere of the wet well from entering the control center.

Pump motor cables shall meet the requirements of the NEC for cords in industry wastewater pumping stations. Power cord terminal fittings shall be corrosion-resistant and constructed in a manner to prevent moisture entry into the cable. They shall also be provided with strain relief devices.

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The existing Monaco wireless telemetry system shall be retained and made fully operational.

The contractor shall coordinate all work with the existing system to ensure there is no interruption of alarm reporting to the base dispatch center.

6.2 Electrical Demolition

The abandonment and modifications of lift stations shall consist of removing all pumps, motors, and electrical appurtenances above finished grade. Government shall have the opportunity to evaluate infrastructure to be salvaged.

Coordinate with other trades to ensure the electrical service is sequenced with other trades to keep the lift station in operation. The contractor shall protect the existing Monaco controller, Monaco antennas and associated telecommunication cabinets during all phases of construction.

6.3 Electrical Construction

Contractor will be required to verify and trace all existing panel sources, main circuit breakers, branch circuits, and existing loads information.

Provide a 120-volt, 20-amp duplex, GFI, receptacle in an “in-use” weatherproof box equipped with a clear cover. Light switches shall also be installed in a weatherproof box with an “in use” clear weatherproof cover.

Power Monitoring: Coordinate with Honeywell for what information and alarms need displayed and logged. As a minimum SCADA shall display the following:

• KWhr, KVARh, KVAh

• 3 phase voltages (per phase and average)

• 3 phase current (per phase and average)

• Frequency (Hz)

Provide general illumination levels equal to 1.0 foot-candle, on average, in lift station equipment & Control Panel area. Use LED for general illumination. Site lighting is not to interfere with surrounding area.

Provide all electrical and telecommunications infrastructure to support a functional and integrated hardwired Direct Digital Control (DDC) system.

The contractor shall reconnect the new pump control panel to the existing Monaco wireless alarm system. All existing alarms points shall be terminated on the new control panel to ensure full functionality. All remote monitoring and alarm functions shall be accomplished via of the existing Monaco system.

Appendix A

Acronyms and Abbreviations

A Ampere(s)

AABC Associated Air Balance Council

ACCA Air Conditioning Contractors Association

ACI American Concrete Institute

ACS Access Control System

ACT Acoustic Ceiling Tile

AFB Air Force Base

AFF Above Finished Floor

AFI Air Force Instruction

AHJ Authorities Having Jurisdiction

AHU Air Handling Unit

AISC American Institute of Steel Construction

ANSI American National Standards Institute

ASCE American Society of Civil Engineers

ASHRAE American Society of Heating, Refrigeration and Air-Conditioning Engineers

ASTM American Society for Testing and Materials

BTHU British thermal unit

BUR Built-Up Roof

CAC Common Access Card

CBT Computer Based Training

CCTV Closed Circuit Television

CIPS Cyberspace Infrastructure Planning System

CMU Concrete Masonry Unit

COMM Communications

DB Dry Bulb

DoD Department of Defense

DX Direct Expansion

E East

EBI Enterprise Building Integrator

EMI Electromagnetic Interference

EMT Electrical Metallic Tubing

FCI Fire Control Instruments

FCU Fan Coil Unit

FF-L Federal Specification

FPS Feet Per Second

FT Feet

GSA General Services Administration

HR Hour(s)

HSS Hollow Structural Section

HVAC Heating, Ventilation and Air Conditioning

IAW In Accordance With

IBC International Building Code

IC Intelligence Community

ICD Intelligence Community Directive

ICS Intelligence Community Standard

IDS Intrusion Detection System

IEBC International Existing Building Code

IECC International Energy Conservation Code

IMC International Mechanical Code

IN Inches

IPC International Plumbing Code

IT Information Technology kVA Kilovolt-Ampere

LAN Local Area Network

LED Light Emitting Diode

MOD Motorized Damper

N North

NEBB National Environmental Balancing Bureau

NFPA National Fire Protection Association

NIPR Non-Secure Internet Protocol Router

PSF Pounds per Square Foot

RF Radio Frequency

RFI Radio-Frequency Interference

SIPR Secure Internet Protocol Router

SMACNA Sheet Metal and Air Conditioning Contractors' National Association

S South

STC Sound Transmission Class

TAFB Tinker Air Force Base

UFC Unified Facilities Criteria

UPS Uninterruptible Power Supply

V Volts

VAV Variable Air Volume

W West

WB Wet Bulb

WG Water Gauge

§ Subsection

°F Fahrenheit

Appendix B

Civil Calculations and Cutsheets

Appendix C

Architectural Calculations and Cutsheets

Appendix D

Structural Calculations and Cutsheets

Appendix E

Mechanical / Plumbing Calculations and Cutsheets

Appendix F

Electrical Calculations and Cutsheets

Appendix G

Fire Protection Calculations and Cutsheets