Amendment_0004_W912DW18B0003.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

Solicitation No. W912DW18B0003, Amendment 0004 WAARNG Barracks and Dining Facility (DFAC), Yakima Traiing Center (YTC), WA The purpose of this Amendment is to:

1) REVISE Mechanical Performance Requirements to remove Variable Refrigerant Flow (VRF) equipment requirement.

2) UPDATE Cast-In-Place Concrete Specs to include requirements for Gypsum Concrete Underlayment.

3) EXTEND THE BID OPENING/DUE DATE to TUESDAY, APRIL 3, 2018 at 2:00pm Pacif ic Time.

See attached Summary of Changes All other terms and conditions remain unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

1 3

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 22-Mar-2018

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912DW18B0003

X 9B. DATED (SEE ITEM 11)

09-Feb-2018

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer X is extended, is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

22-Mar-2018

CODE

USA ENGINEER DISTRICT, SEATTLE

ATTN: CENWS-CT

4735 EAST MARGINAL WAY SOUTH, BLDG. 1202

SEATTLE WA 98134-2388

W912DW 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912DW18B0003

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE (SF 30)

The following have been added by full text:

SUMMARY OF CHANGES

SUMMARY OF CHANGES

SUMMARY AMENDMENT 0004

1. The purpose of Amendment 0004 is:

A) Revised Mechanical Performance Requirements - removed Variable Refrigerant Flow equipment requirement

B) Cast-in-place Concrete – updated to include requirements for Gypsum Concrete Underlayment

See Attached Sections and Drawings: 01 86 19 M3-101

03 30 00.00 10

C) To Extend the Scheduled Bid Opening/Due date is extended to Tuesday, April 3, 2018 at 2:00 PM, Pacific Time.

2. All other terms and conditions remain unchanged.

3. NOTICE TO BIDDERS: Bidders must acknowledge receipt of this Amendment 0004 by number and date on proposal. Please mark outside of the envelope in which your bid is enclosed to show amendment received.

(End of Summary of Changes)

W912DW18B0003

FY16 YTC WAARNG Barracks & DFAC 12050 Yakima Training Center, WA W912DW18B0003

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 86 19

MECHANICAL PERFORMANCE REQUIREMENTS

04/13

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 MECHANICAL DESIGN - GENERAL

1.3.1 Mechanical Design Criteria - General

1.3.1.1 U.S. Army Corps of Engineers

1.3.1.2 Unified Facilities Criteria (UFC)

1.3.1.3 Engineering and Construction Bulletins (ECB)

1.3.1.4 American Society of Heating, Refrigeration and Air

Conditioning Engineers (ASHRAE)

1.3.1.5 National Fire Protection Association (NFPA)

1.3.1.6 Sheet Metal and Air Conditioning Contractors National

Association (SMACNA)

1.3.1.7 Other Codes and Standards

1.4 MECHANICAL DESIGN - DINING FACILITY

1.4.1 General

1.4.2 Mechanical Design Criteria - Dining Facility

1.4.3 Heating, Ventilation, and Air Conditioning (HVAC) Design

Requirements

1.4.3.1 Weather Data Location

1.4.3.2 Elevation

1.4.3.3 Outside Design Temperatures

1.4.3.4 Inside Design Conditions

1.4.3.5 Degree Days

1.4.3.6 Outside Air Requirements

1.4.3.7 Maximum “U” Values

1.4.4 HVAC Systems

1.4.4.1 General

1.4.4.2 Hydronic System

1.4.4.3 Dining Area

1.4.4.4 Kitchen Areas

1.4.4.5 Ventilation

1.4.5 Heating and Ventilation Controls

1.4.6 Energy Analysis

1.4.6.1 Purpose

1.4.6.2 Proposed Systems

1.4.6.3 Analysis Approach

1.4.6.4 ASHRAE 90.1 - 2007 Appendix G Baseline Systems

1.4.6.5 Energy Use

1.4.6.6 Energy Rates

1.4.6.7 Summary/Results

1.4.7 Plumbing

1.4.7.1 Plumbing System

1.4.7.2 Materials

1.4.7.3 Domestic Hot Water

SECTION 01 86 19 Page 1 R0004

1.4.7.4 Natural Gas

1.4.8 Vapor Intrusion Mitigation

1.4.9 Universal Accessibility (ADA)

1.5 MECHANICAL DESIGN - BARRACKS

1.5.1 General

1.5.2 Mechanical Design Criteria - Barracks

1.5.3 Heating, Ventilation and Air Conditioning (HVAC) Design

Requirements

1.5.3.1 Weather Data Location

1.5.3.2 Elevation

1.5.3.3 Outside Design Temperatures

1.5.3.4 Inside Design Conditions

1.5.3.5 Degree Days

1.5.3.6 Outside Air Requirements

1.5.3.7 Maximum “U” Values

1.5.4 HVAC Systems

1.5.4.1 General

1.5.4.2 Barracks Modules

1.5.4.3 Common Areas

1.5.5 Heating and Ventilation Controls

1.5.6 Energy Analysis

1.5.6.1 Purpose

1.5.6.2 Proposed Systems

1.5.6.3 Analysis Approach

1.5.6.4 ASHRAE 90.1-2007 Appendix G Baseline Systems

1.5.6.5 Energy Use

1.5.6.6 Energy Rates

1.5.6.7 Summary/Results

1.5.7 Plumbing

1.5.7.1 Plumbing System

1.5.7.2 Materials

1.5.7.3 Domestic Hot Water

1.5.7.4 Natural Gas

1.5.8 Vapor Intrusion Mitigation

1.5.9 Universal Accessibility (ADA)

PART 2 PRODUCTS

PART 3 EXECUTION

ATTACHMENTS:

01 86 19-A

-- End of Section Table of Contents --

SECTION 01 86 19 Page 2

SECTION 01 86 19

MECHANICAL PERFORMANCE REQUIREMENTS

04/13

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING

ENGINEERS (ASHRAE)

ASHRAE EQUIP IP HDBK (2012) Handbook, HVAC Systems and Equipment (IP Edition)

ASHRAE FUN IP (2013) Fundamentals Handbook, I-P Edition

ASHRAE REFRIG IP HDBK (2010) Handbook, Refrigeration (IP Edition)

ASHRAE HVAC APP IP HDBK (2012) HVAC Applications Handbook, I-P Edition

ASHRAE 189.1 (2011; ERTA 2012) Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings

ASHRAE 55 (2010; Errata ) Thermal Environmental Conditions for Human Occupancy

ASHRAE 62.1 - 2007 (2007) Ventilation for Acceptable Indoor Air Quality

ASHRAE 62.1 - 2010 (2010) Ventilation for Acceptable Indoor Air Quality

ASHRAE 90.1 - 2007 (2007) Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 90.1 - 2010 (2010) Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 90.1 - 2013 (2013) Energy Standard for Buildings Except Low-Rise Residential Buildings

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 13 (2013) Standard for the Installation of Sprinkler Systems

NFPA 54 (2012) National Fuel Gas Code

NFPA 72 (2013) National Fire Alarm and Signaling Code

SECTION 01 86 19 Page 3

NFPA 90A (2012) Standard for the Installation of Air Conditioning and Ventilating Systems

NFPA 90B (2012) Standard for the Installation of Warm Air Heating and Air Conditioning Systems

NFPA 96 (2011) Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations

NFPA 101 (2012) Life Safety Code

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION

(SMACNA)

SMACNA 1958 (2006) HVAC Systems - Duct Design, 4th Edition

SMACNA 1966 (2005) HVAC Duct Construction Standards Metal and Flexible, 3rd Edition

INTERNATIONAL CODE COUNCIL (ICC)

ICC IMC (2012) International Mechanical Code

ICC IPC (2012) International Plumbing Code

U.S. DEPARTMENT OF DEFENSE (DOD)

UFC 1-200-02 (2013) High Performance and Sustainable Building Requirements

UFC 3-310-04 (2012) Seismic Design for Buildings

UFC 3-400-02 (2003) Engineering Weather Data

UFC 3-410-01 (2013) Heating, Ventilating and Air Conditioning Systems

UFC 3-410-02 (2012) Lonworks (R) Direct Digital Controls for HVAC and Other Local Building Systems

UFC 3-420-01 (2004) Plumbing

UFC 3-580-01 (2007) Telecommunications Interior Infrastructure Planning and Design

UFC 3-600-01 (2013) Fire Protection Engineering for Facilities

UFC 4-010-01 (2012) DoD Minimum Antiterrorism Standards for Buildings

ECB 2011-1 (2011) High Performance Energy and Sustainability Policy

SECTION 01 86 19 Page 4

ECB 2012-7 (2012) Release of MILCON Energy Efficiency and Sustainability Study of Five Types of Army Buildings Summary Report

ECB 2012-13 (2012) Energy Implementation Guidance Update, ASHRAE 189.1, Life-Cycle Cost Analysis Requirements

ECB 2012-14 (2012) Update to High Performance Energy and Sustainability, Leadership in Energy and Environmental Design (LEED) Certification Guidance

ETL 1110-3-489 (1998) Domestic Water Heaters for Barracks

ABA (2008) ABA Accessibility Standard for Department of Defense Facilities

UNDERWRITERS LABORATORIES (UL)

UL 710 (1995; Rev thru Apr 1999) Exhaust Hoods for Commercial Cooking Equipment

U.S. ARMY CORPS OF ENGINEERS (USACE)

TI 800-01 (1998) Design Criteria

U.S. ARMY (DA)

TB MED 530 (2002) Tri-Service Food Code

U.S. GREEN BUILDING COUNCIL (USGBC)

LEED NC (2009) Leadership in Energy and Environmental Design(tm) New Construction Rating System

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-05 Design Data

Dining Facility and Barracks Mechanical and Plumbing Drawings; G Dining Facility and Barracks Mechanical and Plumbing Calculations;

G Dining Facility and Barracks Life Cycle Cost Analysis; G Dining Facility and Barracks Mechanical and Plumbing Specifications;

G

1.3 MECHANICAL DESIGN - GENERAL

1.3.1 Mechanical Design Criteria - General

The following documents shall be used as part of the mechanical design.

SECTION 01 86 19 Page 5

1.3.1.1 U.S. Army Corps of Engineers

TI 800-01, Design Criteria, 20 July 1998 except Chapter 11 Energy Conservation

1.3.1.2 Unified Facilities Criteria (UFC)

UFC 3-420-01 Plumbing UFC 3-400-02 Engineering Weather Data UFC 1-200-02 High Performance and Sustainable Building Requirements UFC 3-410-01 Heating, Ventilating, and Air Conditioning Systems UFC 3-410-02 Lonworks (R) Direct Digital Controls for HVAC and Other Local Building Systems UFC 3-310-04 Seismic Design for Buildings UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings UFC 3-600-01 Fire Protection Engineering for Facilities UFC 3-580-01 Telecommunications Interior Infrastructure Planning and Design

1.3.1.3 Engineering and Construction Bulletins (ECB)

ECB 2011-1, High Performance Energy and Sustainability Policy.

ECB 2012-7, Release of MILCON Energy Efficiency and Sustainability Study of Five Types of Army Buildings Summary Report.

ECB 2012-13, Energy Implementation Guidance Update, ASHRAE 189.1, Life-Cycle Cost Analysis Requirements.

ECB 2012-14, Update to High Performance Energy and Sustainability, Leadership in Energy and Environmental Design (LEED) Certification Guidance.

1.3.1.4 American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE)

ASHRAE EQUIP IP HDBK ASHRAE Systems and Equipment ASHRAE FUN IP ASHRAE Fundamentals ASHRAE REFRIG IP HDBK ASHRAE Refrigeration ASHRAE HVAC APP IP HDBK ASHRAE HVAC Applications ASHRAE 55 Thermal Environmental Conditions for Human Occupancy ASHRAE 62.1 - 2007 and ASHRAE 62.1 - 2010 Ventilation for Acceptable Indoor Air Quality.

ASHRAE 90.1 - 2007 and ASHRAE 90.1 - 2010 and ASHRAE 90.1 - 2013 Energy Standard for Buildings Except Low-Rise Residential Buildings ASHRAE 189.1 - Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings

1.3.1.5 National Fire Protection Association (NFPA)

NFPA, all applicable sections including:

NFPA 13 Standard for the Installation of Sprinkler Systems NFPA 54 National Fuel Gas Code NFPA 72 National Fire Alarm Code NFPA 90A Installation of Air Conditioning and Ventilation Systems NFPA 90B Installation of Warm Air Heating and AC Systems NFPA 101 Life Safety Code

SECTION 01 86 19 Page 6

1.3.1.6 Sheet Metal and Air Conditioning Contractors National Association

(SMACNA)

SMACNA 1958 HVAC Systems Duct Design SMACNA 1966 HVAC Duct Construction Standards – Metal and Flexible

1.3.1.7 Other Codes and Standards

ICC IPC International Plumbing Code ICC IMC International Mechanical Code ABA Architectural Barriers Act Standards

1.4 MECHANICAL DESIGN - DINING FACILITY

1.4.1 General

Mechanical and plumbing design for the Dining Facility shall be performed by the Contractor. Submit mechanical and plumbing drawings, mechanical and plumbing calculations, and mechanical and plumbing specifications for Government review in accordance with Section 01 33 00 SUBMITTAL PROCEDURES. Mechanical and plumbing design shall meet or exceed applicable ASHRAE 189.1 requirements. Design work includes mechanical and plumbing items in LEED NC for design and documentation, including Water Use Reduction, Optimize Energy Performance, Outdoor Air Delivery Monitoring, Indoor Chemical and Pollutant Source Control, and Thermal Comfort - Design.

1.4.2 Mechanical Design Criteria - Dining Facility

In addition to general mechanical criteria listed above, the following are included for the Dining Facility.

TB MED 530 Tri-Service Food Code

NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations

1.4.3 Heating, Ventilation, and Air Conditioning (HVAC) Design Requirements

1.4.3.1 Weather Data Location

Yakima, Washington (DOE Climate Zone 5B (Yakima County)).

1.4.3.2 Elevation

1066 feet above sea level.

1.4.3.3 Outside Design Temperatures

Per UFC 3-400-02:

Summer Dry Bulb (1 percent): 92 degrees F Mean Coincident Wet Bulb: 65 degrees F Winter Dry Bulb (99 percent): 10 degrees F

1.4.3.4 Inside Design Conditions

Winter:

Dining Areas, Dry Bulb: 70 degrees F

SECTION 01 86 19 Page 7

Kitchen Areas, Dry Bulb: 70 degrees F Administration Areas, Dry Bulb: 70 degrees F Storage/Mechanical/Electrical Room, Dry Bulb: 55 degrees F

Summer:

Dining Areas, Dry Bulb: 78 degrees F Kitchen Areas, Dry Bulb: 78 degrees F Administration Areas, Dry Bulb: 78 degrees F Storage/Mechanical/Electrical Room, Dry Bulb: (outside design temp) + (10 degrees F) = 102 degrees F Communications Room, Dry Bulb: 75 degrees F

1.4.3.5 Degree Days

Degree Days, Heating:

6199 (65 degrees F base) per year.

Degree Days, Cooling:

883 (65 degrees F base) per year

1.4.3.6 Outside Air Requirements

Per ASHRAE 62.1 - 2010, Tables 6-1 and 6-4

Cafeteria: 7.5 CFM/person + 0.18 CFM/ft2 Occupancy rate 100 people/1,000 sq. ft.

Kitchen: 7.5 CFM/person + 0.12 CFM/ft2 Occupancy rate 20 people/1,000 sq. ft.

Offices: 5 CFM/person + 0.06 CFM/ft2 Toilets: 50 CFM continuous or 70 CFM intermittent per toilet/urinal (exhaust).

Commercial kitchens: 0.70 CFM/sq. ft (exhaust).

1.4.3.7 Maximum “U” Values

Walls:

ASHRAE 90.1 - 2007: 0.064 Btuh/(sq. ft. deg. F) (baseline steel-framed) ASHRAE 189.1: 0.046 Btuh/(sq. ft. deg. F) (nonresidential, wood-framed)

Roof:

ASHRAE 90.1 - 2007: 0.048 Btuh/(sq. ft. deg. F) (baseline insulation above deck) ASHRAE 189.1: 0.029 Btuh/(sq. ft. deg. F) (insulation above deck)

Doors:

ASHRAE 90.1 - 2007: 0.70 Btuh/(sq. ft. deg. F) (baseline nonresidential) ASHRAE 189.1: 0.45 Btuh/(sq. ft. deg. F)

Windows:

ASHRAE 90.1 - 2007: 0.55 Btuh/(sq. ft. deg. F) (baseline) ASHRAE 189.1: 0.45 Btuh/(sq. ft. deg. F)

SECTION 01 86 19 Page 8

U-values for construction shall be less than or equal to those listed above for ASHRAE 189.1.

1.4.4 HVAC Systems

1.4.4.1 General

The basis of design assumes all kitchen equipment shall use natural gas as the primary form of fuel. HVAC heating equipment shall use hot water as the primary source of heating. Air conditioning shall be provided by two packaged air-cooled unitary VAV rooftop units. Paint roof mounted equipment to match the Dining Facility membrane roof. Minimum outdoor air requirements to satisfy indoor air quality shall be as indicated above.

1.4.4.2 Hydronic System

Hydronic piping shall be Type L copper. The Dining Facility shall have a high-efficiency condensing natural gas fired boiler. A primary heating hot water arrangement shall be used, with redundant pumps. The hydronic system shall supply terminal unit heating coils, and shall be reset based on outside air conditions.

1.4.4.3 Dining Area

Air conditioning and heating to the dining and surrounding areas shall be provided by a single zone variable air volume system. The system shall vary airflow based on the dining room temperature set point and occupancy schedule. Return air flow shall be controlled to follow the trend of the supply air. The system exhaust air shall be used in an energy recovery device to pre-heat the incoming outside air.

1.4.4.4 Kitchen Areas

Air conditioning and heat to the kitchen and surrounding areas shall be provided by a single zone variable air volume system. The system shall vary airflow based on the kitchen temperature setpoint and occupancy schedule.

Return air flow shall be controlled to follow the trend of the supply air.

The system exhaust air shall be used in an energy recovery device to pre-heat the incoming outside air.

Make-up air for the cooking equipment exhaust shall be provided by a packaged make-up air unit positioned on the roof above the kitchen. This system shall utilize natural gas for heating and have a DX coil for cooling. The unit selected shall have heat reclamation capabilities utilizing the exhaust air from appropriate kitchen exhaust hoods. Utilizing the cooking equipment exhaust will greatly reduce energy consumption and move the project significantly closer to meeting energy reduction requirements.

1.4.4.5 Ventilation

The kitchen exhaust hood(s) shall be ultraviolet (UV) type hoods with high efficiency removable grease filters. Exhaust hoods shall use variable speed fans for demand control ventilation based on the cooking equipment requirements. The kitchen, dishwash, pot/pan washing, service spaces, and restrooms shall maintain a negative pressure while the dining, point of sale and queuing areas shall have a positive pressure. Air curtain fan shall be provided over all personnel entry/exit doors and receiving

SECTION 01 86 19 Page 9 vestibule doors. Fans shall be full width of doors and mounted on interior side immediately above door. Emergency Exit Only doors and Mechanical/Electrical Rooms do not require air curtain fans. Kitchen hood systems shall be stainless steel all welded construction and shall include lights, filters, grease troughs and fire protection systems. Hoods shall be UL and NSF approved/certified/listed. Hoods shall be certified to meet International Mechanical Code required velocities for the service application. If face discharge hoods are utilized, they shall be provided with tempered makeup air. Makeup air shall be tempered to 85 degrees Fahrenheit for cooling and 60 degrees for heating. Kitchen hood functions shall be indicated by designating “Type I Grease Laden Air Hood” and “Type II Condensate Laden Air Hood” in the hood schedule. Kitchen hood systems shall be designed and installed in compliance with NFPA 96. Kitchen hoods shall be UL rated in accordance with UL 710. Exhaust hoods shall be provided with independent on/off switch. Areas and kitchen equipment requiring exhaust air systems include the following: restrooms, janitor’s room (minimum 0.5 CFM/square foot), servery and kitchen hoods, dishwashing area, mechanical and electrical rooms. Communications Room shall be positively pressurized.

1.4.5 Heating and Ventilation Controls

A direct digital control (DDC) system shall be utilized for temperature control. Sensors shall monitor building temperature.

A Siemens building management system, fully compatible with the existing Yakima Training Center system used at the Marine Reserve Center, shall be provided to monitor all HVAC functions. The system shall be capable of monitoring all zone temperatures, as well as changing setpoints and logging trend data. Provide natural gas, electric, and water meter interfaces to connect to the Enterprise Energy Data Reporting System (EEDRS) for monitoring natural gas, electric, and water usage.

1.4.6 Energy Analysis

1.4.6.1 Purpose

This analysis shall determine the designed building’s energy performance compared to the American Society of Heating, Refrigeration, and Air-conditioning Engineers ASHRAE 90.1 - 2007 Appendix G baseline building. The analysis shall determine whether the building is meeting the requirement of 30 percent reduction from the ASHRAE 90.1 - 2007 Appendix G baseline building using ECB 2012-13 calculation methods. The results shall also determine the amount of LEED NC (2009) credits the building is eligible to earn. Provide a life cycle cost analysis for their design in accordance with ECB 2012-13.

1.4.6.2 Proposed Systems

See Paragraph HEATING, VENTILATION, AND AIR CONDITIONING (HVAC) DESIGN REQUIREMENTS above.

1.4.6.3 Analysis Approach

Annual energy use is estimated using an 8,760 hour building simulation with Trane TRACE 700. Energy model inputs for the proposed design match values supplied on final submittal drawings, schedules, and design calculations.

All baseline building model inputs match proposed design inputs or are as directed from ASHRAE 90.1 - 2007 Appendix G. Utility rates used are those

SECTION 01 86 19 Page 10 provided by Yakima Training Center.

1.4.6.4 ASHRAE 90.1 - 2007 Appendix G Baseline Systems

Packaged DX AHUs with natural gas boilers (system 3) was applied to the baseline energy model. Cooling capacity was sized at 115 percent, and heating capacity was sized at 125 percent. Domestic hot water was provided by natural gas. All equipment efficiencies correspond to the ASHRAE 90.1 - 2007 requirements based on cooling size.

1.4.6.5 Energy Use

The estimated annual energy usage for each system was obtained from the energy modeling software Trane TRACE 700. TRACE 700 utilizes algorithms from the American Society of Heating, Refrigerating, and Air- Conditioning Engineers (ASHRAE) and Department of Energy (DOE) to calculate the building’s heating and cooling requirements and to model annual energy usage. The software performs an 8,760 hour simulation to accurately model the building’s energy use. The energy used by the building was taken from the output report. A summary of the annual energy use is below.

1.4.6.6 Energy Rates

Electricity - $0.04473 / kWh Natural Gas - $0.955 / therm (uninterruptible service)

1.4.6.7 Summary/Results

Proposed Building Energy Use:

1,828 10^6 Btu / year $21,481 / year

Baseline Building Energy Use:

2,575 10^6 Btu / year $28,791 / year

Project LEED NC v3 Performance 29 percent - 9 points Project Percentage Energy Savings over ASHRAE 90.1 - 2007, 25 percent

1.4.7 Plumbing

1.4.7.1 Plumbing System

Pipe Zones: Zone isolation valves shall be provided so that portions of each system may be isolated for operations and maintenance purposes without affecting the entire system.

1.4.7.2 Materials

Water piping and fittings above-grade shall be Type L copper, hard-drawn.

All piping shall be concealed to the greatest extent possible. Where metallic piping cannot be concealed it shall be stainless steel or chrome-plated. Water meter shall be provided inside the Mechanical Room.

Thermostatically controlled mixing valves shall be provided to distribute water to fixtures at 110 degrees F.

Soil, waste, and vent piping above-grade shall be ABS. Below-grade, SECTION 01 86 19 Page 11 service-weight, gasketed hub-and-spigot piping shall be used. Plumbing materials, installation, backflow prevention, and drainage shall meet the latest International Plumbing Code requirements. Trap primers shall be provided at all floor drains. Grease interceptor located underground, outside the building, shall be provided for waste from the kitchen area.

The grease interceptor shall be provided for collecting and containing grease from waste drain line flows emanating from kitchen food preparation and dishwashing and pot/can wash areas. The grease interceptor shall be located outside of facility in a location that is accessible to a vacuum grease collection truck. Size of the grease interceptor shall be 2,000 gallons. Provide all plumbing connections, including water, drain and gas, to kitchen equipment as indicated on plans.

Fixtures shall be water conservation type in accordance with International Plumbing Code. Fixtures for use by the physically handicapped shall be in accordance with Council of American Building Officials (CABO) A117.1, Accessible and Usable Buildings and Facilities or International Code Council. Vitreous china, nonabsorbent, hard-burned, and vitrified throughout the body shall be provided. Fixtures shall be equipped with appurtenances, such as traps, faucets, stop valves, and drain fittings.

Each fixture shall be equipped with a trap. All kitchen sinks shall be UL and NSF approved/certified/listed.

Water closets shall be siphon jet, white vitreous china elongated bowl, wall-mounted, flush valve type with white open front seat. Water closets shall be low volume flush, 1.28 gallon or less. Urinals shall be water-type, high efficiency, 0.5 gallon or less per flush.

Undercounter-type lavatory shall be white vitreous china and provided with undermounting kit and template, and widespread single spout mixing faucet with separate hot and cold lever handles and strainer drain. Wall-mounted lavatory shall be white vitreous china, and widespread single spout mixing faucet with separate hot and cold wristblade lever handles and strainer drain. Lavatory faucets shall limit flow to 0.5 gpm. Faucet finish shall be satin or brushed chrome. Janitor sink shall be floor-mounted with mixing faucet with lever handles, rigid spout with hose threads, vacuum breaker, wall brace, and pail hook. Exterior wall hydrants shall be provided around the perimeter of the building in sufficient quantity such that all areas can be reached with a 50-foot hose.

Water cooler shall conform to Air-conditioning and Refrigeration Institute (ARI) 1010, "Drinking-Fountains and Self-Contained, Mechanically-Refrigerated Drinking-Water Coolers", shall include stainless steel cabinet, 8 gph rated compressor, front and side push bar actuators, be handicapped accessible and include a water bottle filling feature.

Refrigerant shall be non-CFC/non-HCFC.

Plumbing fixtures for the Dining Facility include the following:

Water Closet (flush valve-type, wall-mounted) Water Closet (Accessible, flush valve-type, wall-mounted) Lavatory Kitchen Sinks Electric Water Cooler (Accessible with bottle filler) Service Sink Wall Hydrant (freeze-proof) Floor Drains

SECTION 01 86 19 Page 12

1.4.7.3 Domestic Hot Water

A high-efficiency, condensing-type natural gas fired hot water heater with a recirculation pump shall provide domestic hot water for the Dining Facility.

Water heaters and storage tanks are required to be maintained at 140 degrees F minimum to reduce the potential for Legionnella Pneumophila (Legionnaire’s Disease). Multiple thermostatically controlled mixing valves piped in parallel shall be used to distribute water to fixtures at 110 degrees F, except for kitchen fixtures such as dishwasher, requiring 140 degrees F.

The optimum selection of storage volume and firing rates shall depend on space requirements for equipment and flues, capital costs, standby energy losses of storage tanks, losses from DHW heaters, and expected replacement costs. Cost comparisons shall be made to optimize the selection, although at this stage, the proposed domestic hot water system is based on reliance on storage versus high firing rates.

1.4.7.4 Natural Gas

Low pressure gas piping inside the Dining Facility shall serve the domestic hot water heater, hot water boiler, gas-fired heaters, and gas cooking equipment in the kitchen.

1.4.8 Vapor Intrusion Mitigation

Provide a passive venting system that uses suction pit and communication pipes below the slab and connects to a vent stack through the roof.

1.4.9 Universal Accessibility (ADA)

Plumbing fixtures in the Dining Facility shall include accessible fixtures.

1.5 MECHANICAL DESIGN - BARRACKS

1.5.1 General

Mechanical and plumbing design for the Barracks shall be performed by the Contractor. Submit mechanical and plumbing drawings, mechanical and plumbing calculations, and mechanical and plumbing specifications for Government review in accordance with Section 01 33 00 SUBMITTAL PROCEDURES. Mechanical and plumbing design shall meet or exceed applicable ASHRAE 189.1 requirements. Design work includes mechanical and plumbing items in LEED NC for design and documentation, including Water Use Reduction, Optimize Energy Performance, Outdoor Air Delivery Monitoring, Indoor Chemical and Pollutant Source Control, and Thermal Comfort - Design.

1.5.2 Mechanical Design Criteria - Barracks

In addition to general mechanical criteria listed above, the following are included for the Barracks:

ETL 1110-3-489 Domestic Water Heaters for Barracks

SECTION 01 86 19 Page 13

1.5.3 Heating, Ventilation and Air Conditioning (HVAC) Design Requirements

1.5.3.1 Weather Data Location

Yakima, Washington (DOE Climate Zone 5B (Yakima County)).

1.5.3.2 Elevation

1066 feet above sea level.

1.5.3.3 Outside Design Temperatures

Per UFC 3-400-02:

Summer Dry Bulb (1 percent): 92 degrees F Mean Coincident Wet Bulb: 65 degrees F Winter Dry Bulb (99 percent): 10 degrees F

1.5.3.4 Inside Design Conditions

Winter:

Living Areas, Dry Bulb: 70 degrees F Administration/Common Areas, Dry Bulb: 70 degrees F Storage/Mechanical/Electrical Room, Dry Bulb: 55 degrees F

Summer:

Living Areas, Dry Bulb: 78 degrees F Administration/Common Areas, Dry Bulb: 78 degrees F Storage/Mechanical/Electrical Room, Dry Bulb: (outside design temp) + (10 degrees F) = 102 degrees F Communications Room, Dry Bulb: 75 degrees F

1.5.3.5 Degree Days

Degree Days, Heating:

6199 (65 degrees F base) per year.

Degree Days, Cooling:

883 (65 degrees F base) per year

1.5.3.6 Outside Air Requirements

Per ASHRAE 62.1 - 2010, Tables 6-1 and 6-4

Bedrooms / Barracks sleeping areas: 5 CFM/person plus 0.06 CFM/ft2 Baths: 25 CFM continuous or 50 CFM intermittent per bath/toilet (exhaust).

Lobbies: 7.5 CFM/person + 0.06 CFM/ft2 Occupancy rate 30 people/1,000 sq. ft.

Corridors: 0.06 CFM/ft2 Offices: 5 CFM/person + 0.06 CFM/ft2 Assembly Rooms: 5 CFM/person + 0.06 CFM/ft2 Occupancy rate 120 people/1,000 sq. ft.

Laundries: 7.5 CFM/person + 0.06 CFM/ft2 Occupancy rate 20 people/1,000 sq. ft.

SECTION 01 86 19 Page 14

1.5.3.7 Maximum “U” Values

Walls:

ASHRAE 90.1 - 2007: 0.064 Btuh/(sq. ft. deg. F) (baseline steel-framed) ASHRAE 189.1: 0.046 Btuh/(sq. ft. deg. F) (residential, wood-framed)

Roof:

ASHRAE 90.1 - 2007: 0.048 Btuh/(sq. ft. deg. F) (baseline insulation above deck) ASHRAE 189.1: 0.029 Btuh/(sq. ft. deg. F) (insulation above deck)

Doors:

ASHRAE 90.1 - 2007: 0.50 Btuh/(sq. ft. deg. F) (baseline residential) ASHRAE 189.1: 0.45 Btuh/(sq. ft. deg. F)

Windows:

ASHRAE 90.1 - 2007: 0.55 Btuh/(sq. ft. deg. F) (baseline) ASHRAE 189.1: 0.45 Btuh/(sq. ft. deg. F)

U-values for construction shall be less than or equal to those listed above for ASHRAE 189.1.

1.5.4 HVAC Systems

1.5.4.1 General

Heating and air conditioning shall be provided by a Variable Refrigerant Flow (VRF) systemfor the Barracks. Minimum outdoor air requirements to satisfy indoor air quality shall be as indicated above. The outdoor units shall be located on the low-sloped roof above the third floor central core area. Outdoor units shall have inverter-driven scroll compressors using R-410A refrigerant that is piped to the indoor fan coil units via the VRF system’s BC controllers.

1.5.4.2 Barracks Modules

Air conditioning and heating for the Barracks shall be provided by a Variable Refrigerant Flow (VRF)heat pump system consisting of indoor fan coil units and an outdoor heat pump unit. The system is capable of simultaneous heating and cooling which will optimize energy efficiency.

When portions of the building are in both heating and cooling modes, the VRF system shall be able to efficiently transfer the heat gain from rooms in cooling to the rooms in heating mode. When all areas are in cooling mode, the system shall perform as a standard A/C split system in which the heat gain from all spaces shall be transferred to the exterior heat pump unit outside. Outside air ventilation shall be provided through an energy recovery unit located at each module.

Each room module shall have a fan coil unit with outside air ducted directly from the module’s exterior wall through the energy recovery unit.

Each fan coil unit and energy recovery unit shall be sized to provide a minimum of 40 cfm of outside air. Air from the fan coil unit shall be provided to the kitchen and the living/sleeping rooms, transferred into the closets, and returned to the unit, as well as exhausted through the energy

SECTION 01 86 19 Page 15 R0004

G3ENDRDN

Rectangle

G3ENDRDN

Rectangle recovery units via the bathroom exhaust system. Occupants shall also have the option of direct ventilation with operable windows; if both windows are open, the fan coil unit shall be disabled.

Each bathroom and shower room shall be exhausted at a minimum rate of 25 cfm on a continuous basis through the energy recovery unit and directly outside the room module’s exterior wall. Exhaust termination on the exterior wall shall be located a minimum distance of 15 feet away from the outside air intake to the room module. The room module kitchen area does not have a range so there is no requirement for a range hood exhaust.

1.5.4.3 Common Areas

The Charge of Quarters (CQ) station, waiting room, and restrooms shall have a dedicated packaged fan coil unit, with outside air ducted to the unit and exhaust from the restrooms and janitor’s closet (minimum 0.5 CFM/square foot). The common area includes laundry rooms with washers and electric clothes dryers. Dryer vents shall be combined into a common duct and exhausted out the exterior wall. A dryer lint trap shall be provided in the common duct to help prevent fires. Makeup air system for the laundry area shall be designed by the Contractor. Additional ideas for the makeup air system include using variable speed control and heat exchange from dryer exhaust to temper the makeup air. Communications Room shall be positively pressurized.

1.5.5 Heating and Ventilation Controls

A direct digital controls (DDC) system shall be utilized for temperature control. Sensors shall monitor building temperature. Barracks module fan coil units shall be controlled by wall-mounted temperature controllers (to adjust temperature within a limited range) with a remote sensor located in the return duct.

A local interface to the DDC shall be provided at the Charge of Quarters (CQ) area to control individual room modules that are not occupied and can be maintained at setback temperatures. Occupancy sensors shall be used inside room modules as a basis for fan coil unit and energy recovery unit operation. Software logic or sensor sensitivity shall have to be included for night time operation when bedrooms are occupied but not activating the occupancy sensors.

A Siemens building management system, fully compatible with the existing Yakima Training Center system used at the Marine Reserve Center, shall be provided to monitor all HVAC functions. The system shall be capable of monitoring all zone temperatures, as well as changing setpoints, and logging trend data. Provide natural gas, electric and water meter interfaces to connect to the Enterprise Energy Data Reporting System (EEDRS) for monitoring natural gas, electric and water usage.

1.5.6 Energy Analysis

1.5.6.1 Purpose

This analysis shall determine the designed building’s energy performance compared to the American Society of Heating, Refrigeration, and Air-conditioning Engineers ASHRAE 90.1 - 2007 Appendix G baseline building. The analysis shall determine whether the building is meeting the requirement of 30 percent reduction from the ASHRAE 90.1 - 2007 Appendix G baseline building using ECB 2012-13 calculation methods. The results shall

SECTION 01 86 19 Page 16 also determine the amount of LEED NC (2009) credits the building is eligible to earn. Provide a life cycle cost analysis for the design in accordance with ECB 2012-13.

1.5.6.2 Proposed Systems

See Paragraph HEATING, VENTILATION AND AIR CONDITIONING (HVAC) DESIGN REQUIREMENTS above.

1.5.6.3 Analysis Approach

Annual energy use is estimated using an 8,760 hour building simulation with Trane TRACE 700. Energy model inputs for the proposed design match values supplied on final submittal drawings, schedules, and design calculations.

All baseline building model inputs match proposed design inputs or are as directed from ASHRAE 90.1 - 2007 Appendix G. Utility rates used are those provided by Yakima Training Center.

1.5.6.4 ASHRAE 90.1-2007 Appendix G Baseline Systems

Packaged DX AHUs with natural gas boilers (system 3) was applied to the baseline energy model. Cooling capacity was sized at 115 percent, and heating capacity was sized at 125 percent. Domestic hot water was provided by natural gas. All equipment efficiencies correspond to the ASHRAE 90.1 - 2007 requirements based on cooling size.

1.5.6.5 Energy Use

The estimated annual energy usage for each system was obtained from the energy modeling software Trane TRACE 700. TRACE 700 utilizes algorithms from the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) and Department of Energy (DOE) to calculate the building’s heating and cooling requirements and to model annual energy usage. The software performs an 8,760 hour simulation to accurately model the building’s energy use. The energy used by the building was taken from the output report. A summary of the annual energy use is below.

1.5.6.6 Energy Rates

Electricity - $0.04473 / kWh Natural Gas - $0.955 / therm (uninterruptible service)

1.5.6.7 Summary/Results

Proposed Building Energy Use:

750.2 10^6 Btu / year $11,524 / year

Baseline Building Energy Use:

1,528.5 10^6 Btu / year $19,904 / year

Project LEED NC v3 Performance 42 percent - 17 points Project Percentage Energy Savings over ASHRAE 90.1 - 2007: 51 percent

The above performance was modeled in Trane TRACE. The proposed system was a VRF system with an EER of 13.8 and a COP of 3.45. No energy savings have

SECTION 01 86 19 Page 17 been associated with the possible inclusion of energy efficient domestic hot water systems (e.g. heat pumps and/or solar domestic hot water heating). The ventilation system is modeled as a DOAS delivering ASHRAE minimum levels of outdoor air.

1.5.7 Plumbing

1.5.7.1 Plumbing System

Pipe Zones:

Zone isolation valves shall be provided so that portions of each system may be isolated for operations and maintenance purposes without affecting the entire system.

For water conservation and sustainability, rainwater collected from roof drains (roof runoff) shall be stored in rain water collection vaults and used as non-potable water for irrigation. In the event minimum rainfall or inadequate storage, potable water shall be used as make up water to satisfy irrigation demands. The system shall consist of collection vaults, hydro pneumatic tanks, pumps, level controls, filtration equipment, and other related equipment and appurtenances necessary to make a complete system. The system shall be clearly marked and labeled in accordance with the latest version of the International Plumbing Code.

1.5.7.2 Materials

Water piping and fittings above-grade shall be Type L copper, hard-drawn.

Water meter shall be provided inside the Mechanical Room. Thermostatically controlled mixing valves shall be provided to distribute water to fixtures at 110 to 120 degrees F.

Soil, waste, and vent piping above-grade shall be ABS. Below-grade, service-weight, gasketed hub-and-spigot piping shall be used. Plumbing materials, installation, backflow prevention, and drainage shall meet the latest International Plumbing Code requirements. Trap primers shall be provided at all floor drains.

Fixtures shall be water conservation type in accordance with International Plumbing Code. Fixtures for use by the physically handicapped shall be in accordance with Council of American Building Officials (CABO) A117.1, Accessible and Usable Buildings and Facilities or International Code Council. Vitreous china, nonabsorbent, hard-burned, and vitrified throughout the body shall be provided. Fixtures shall be equipped with appurtenances, such as traps, faucets, stop valves, and drain fittings.

Each fixture shall be equipped with a trap.

Water closets in the room modules shall be siphon jet, white vitreous china elongated bowl, floor-mounted, tank type with white open front seat. Water closets in the common area shall be siphon jet, white vitreous china elongated bowl, wall-mounted, flush valve type with white open front seat and ADA accessible. Water closets shall be high-efficiency, low volume flush, 1.28 gallon or less.

Undercounter-type lavatory shall be white enameled cast iron and provided with undermounting kit and template, and widespread single spout mixing faucet with separate hot and cold lever handles and pop-up stopper drain.

Private lavatory faucets shall limit flow to 1.5 gpm. Faucet finish shall be satin or brushed chrome. Wall-mounted lavatory shall be white vitreous

SECTION 01 86 19 Page 18 china, and single spout mixing faucet with separate hot and cold wristblade lever handles and strainer drain. Public lavatory faucets shall limit flow to 0.5 gpm. Janitor sink shall be floor-mounted with mixing faucet with lever handles, rigid spout with hose threads, vacuum breaker, wall brace, and pail hook. Kitchenette sink shall be Type 302 or 304 stainless steel, 20-gauge minimum, seamless drawn, undermount, satin finish, sound deadened with single spout mixing faucet with single lever handle. Kitchen faucets shall limit flow to 1.8 gpm.

Bathtub shall be white enameled cast iron. Shower heads shall be 1.5 gpm low flow, with single control pressure compensating mixing faucets. A seamless fiberglass or acrylic surround unit shall be provided at the combination tub/shower.

Garbage disposals in kitchen sinks (if provided as possible bid option) shall be continuous feed with minimum 1/2 horsepower (HP) motor, stainless steel grinding elements, manual motor reset, sound insulation, and plug-type electrical connection. Water supply and drain shall be provided for icemaker located in the common area. Exterior wall hydrants shall be located around the perimeter of the building at areas shown and shall be provided in sufficient quantity such that all areas can be reached with a 50-foot hose. Water cooler shall conform to Air-conditioning and Refrigeration Institute (ARI) 1010, "Drinking-Fountains and Self-Contained, Mechanically-Refrigerated Drinking-Water Coolers", shall include stainless steel cabinet, 8 gph rated compressor, front and side push bar actuators, be handicapped accessible and include a water bottle filling feature.

Refrigerant shall be non-CFC/non-HCFC. Water supply to the GFGI refrigerator is not required.

Plumbing fixtures for the barracks and common areas include the following:

Water Closet (tank-type, floor-mounted) Water Closet (Accessible, wall-mounted) Lavatory (Countertop Undermount) Lavatory (Accessible, Wall-mounted) Kitchen Sink (Countertop Undermount) Electric Water Cooler (Accessible with bottle filler) Laundry Sink (floor-mounted) Service Sink Shower/Bath Unit Washing Machine Outlet Boxes Wall Hydrant (freeze-proof) Floor Drains

1.5.7.3 Domestic Hot Water

(1) A high-efficiency, condensing-type natural gas fired hot water heater with a recirculation pump shall provide domestic hot water for the building.

(2) Water heaters and storage tanks are required to be maintained at 140 degrees F minimum per ETL 1110-3-489 (Domestic Water Heaters for Barracks) to reduce the potential for Legionnella Pneumophila (Legionnaire’s Disease). Multiple thermostatically controlled mixing valves piped in parallel shall be used to distribute water to fixtures at 110 to 120 degrees F. By limiting the temperature to 110 degrees F, individual shower mixing valves could be of the pressure compensating type only, rather than thermostatic mixing type.

SECTION 01 86 19 Page 19

(3) ETL 1110-3-489 indicates that shower and lavatory use are to be calculated at 7.5 minutes and 2 minutes per occupant, with no delay between showers for shared facilities. This results in high peak demand flows, and consequently necessitates the need for large amounts of storage, and high firing capacity heaters.

(4) The optimum selection of storage volume and firing rates shall depend on space requirements for equipment and flues, capital costs, standby energy losses of storage tanks, losses from DHW heaters, and expected replacement costs. Cost comparisons shall be made to optimize the selection, although at this stage, the proposed domestic hot water system is based on reliance on storage versus high firing rates.

(5) The Barracks domestic water heating system shall be integrated with and controlled by the building DDC system. Equipment shall be interlocked and controlled to optimize heater efficiency, so that the system as a whole is operating in the most efficient manner. A suggested system is described below; the contractor is allowed to submit a proposal for an alternate system if it improves overall system efficiency over this design.

(6) The domestic hot water system shall consist of one or more high-efficiency gas fired domestic hot water heaters (primary heaters), in parallel, one or more stainless steel storage tanks, in series, and a heater loop domestic hot water (DHW) pump for each hot water heater, as well as a building loop DHW return pump, a small gas fired water heater, and a small electric water heater. Storage tanks shall be sized to contain enough water at 140 degrees F to provide hot water for the morning shower cycle, assuming 7.5 minute showers for every occupant and 2 minutes of lavatory hot water use, and assuming that for shared barracks modules, one shower directly follows the other.

Hot-water storage tanks shall be constructed by one manufacturer, in accordance with ASME BPV VIII, Div. 1, and ASME stamped for the working pressure of at least 125 psi, and shall have the National Board (AMSE) registration. The tank shall be duplex alloy stainless steel (series 300 and 400) for protection from chloride stress corrosion cracking.

(7) The storage tank(s) shall be set up such that the outlet from the primary heater(s) flows into the first (or only) storage tank through a connection at the top of the tank. Also, there shall be a cold water (CW) connection to the last (or only) storage tank at the bottom of the tank, sized and arranged to provide low velocity entrance and subsequent quiescent flow into the tank. If there are two or more tanks, the bottom of each tank shall have a low velocity CW connection. The connections between tanks shall allow flow in either direction, between the low velocity CW connection on the first tank and the top of the second tank, and from the low velocity CW connection on the second tank and the top of the third tank, etc until the bottom of the last tank is connected to the CW supply as described above. The last (or only) tank shall have an additional connection at the bottom of the tank to allow flow from the tank to the primary heater(s) via the heater loop DHW pump(s). The first tank shall have an additional connection at the top of the tank to allow flow from the tank to the mixing valve, where hot water from the first tank shall mix with cold water to provide 110 degrees F water to the building loop.

(8) The small gas fired water heater shall be located between the outlet in the bottom of the last tank and the heater loop DHW pump(s).

The small electric water heater shall be set at 110 degrees F, and

SECTION 01 86 19 Page 20 located on the 110 degrees F loop at the outlet of the building loop DHW return pump, with a connection from the outlet of the heater to the building hot water supply line, downstream of the mixing valve.

(9) A schematic for the domestic hot water system can be found in Figure A. See Attachment 01 86 19-A after this section.

(10) The hot water heaters and storage tanks shall operate as described below:

During morning showers, stored hot water shall be depleted, and cold water shall be directly…