W912QR24R0027_Specs-0006.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 W912QR24R0027 for the Design/Build for the Renovation of an Army Reserve Center (ARC) and Vehicle Maintenance Shop (VMS) located in Des Moines, IA is hereby amended as follows:

A. The SPECIFICATION SECTIONS have been replaced in their entirety.

01 02 00.00 48 PART 09 PLUMBING DESIGN

01 02 00.00 48 PART 11 HVAC DESIGN

B. Offerors must acknowledge all Amendments.

C. All other terms and conditions remain unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

1 2

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

16C. DATE SIGNED

BY

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 W912QR24R0027

X 9B. DATED (SEE ITEM 11)

03-Apr-2024

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 is extended, X 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

20-Aug-2024

CODE

U. S. ARMY ENGINEER DISTRICT, LOUISVILLE

600 DR. MARTIN LUTHER KING, JR. PLACE

ROOM 821

LOUISVILLE KY 40202-2239

W912QR 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912QR24R0027_Specs-0006

W912QR24R0027

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

(End of Summary of Changes)

515372 Repair of Bldgs. 100 ARC & 101 VMS Des Moines, Iowa

Section 01 02 00.00 48 Part 9 - Page 1 of 7 Certified Final

9.1 DESIGN CRITERIA.

9.1.1 The plumbing system must be designed in compliance with Applicable Criteria located in Part 2 of this section.

9.1.2 For restroom and janitorial layouts of plumbing fixtures, refer to architectural part plans. For recommended locations of plumbing equipment including, but not limited to, water heaters and air compressors, refer to mechanical drawings.

Amendment 0004*******************************************************************************

9.1.3 Existing domestic water, domestic hot water, sanitary waste, and sanitary vent piping must be reused with the exception of revisions required for updated fixture layouts in restrooms, kitchen, and mechanical rooms.

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9.1.4 System design and installation must conform to the mandatory water conservation criteria in ASHRAE Standard 189.1.

9.1.5 Water-softening equipment is not required per existing conditions.

9.1.6 Piping systems must be identified per ANSI requirements. Equipment must be identified with engraved and laminated plastic nameplates or black lamicoid sheets with white lettering. Valves must be provided with tags and indexed to a master schedule.

9.1.7 Equipment and materials must be as specified. Installation must meet the requirements specified. All materials and equipment must be the manufacturer’s latest design.

9.1.8 The Contractor must comply with minimum Antiterrorism/Force Protection criteria in accordance with UFC 4-010-01 requirements.

9.1.9 Systems requiring seasonal drainage must not be used except for lawn irrigation.

9.1.10 No roof-mounted plumbing equipment is permitted, except for solar collectors and associated piping and appurtenances.

9.1.11 Equipment layout must make provisions for manufacturer’s recommended clearance and code requirements.

9.1.12 Systems that are not reused must be demolished. This includes previously abandoned piping, hangers, insulation, electrical connections, and appurtenances.

PART 9

PLUMBING DESIGN

Amendment 0006

AMENDMENT 0006

Section 01 02 00.00 48 Part 9 - Page 2 of 7 Certified Final

9.2 DESIGN NARRATIVE AND CALCULATIONS.

9.2.1 Provide a design narrative and calculations as indicated in the Army Reserve Design Process and Submittal Requirements, UFC 3-420-01, and USACE Louisville Design Guide.

9.2.2 Piping design must be based on the Applicable Criteria for domestic water, sanitary waste and vent piping. All water piping must be sized in accordance with methods outlined in the International Plumbing Code. An isometric diagram of the water system must be included in the design submittal. An isometric diagram of the sanitary sewer system must be included in the design submittal.

9.2.3 Hot water heater sizing must be based on the methods described in the ASHRAE guidelines for the specific building occupancy and usage utilizing the Office Building category.

9.3 PLUMBING FIXTURES AND EQUIPMENT.

9.3.1 Water-conserving plumbing fixtures with fittings and trim must be provided in each building. All existing fixtures must be replaced with new fixtures as defined below.

Fixtures must be water conservation type in accordance with newest version of IPC.

Insulate water and waste piping for accessible lavatories. Fixtures include:

9.3.1.1 Water closets must be wall-mounted vitreous China material with elongated bowls, open-front seats, and 1.28 gpf manual flush valves.

9.3.1.2 Urinals must be wall-mounted vitreous China material with 0.125 gpf manual flush valves.

9.3.1.3 Lavatories must be vitreous China material with manual metering faucets and an individual aerator limited to 0.5 gpm. Lavatory to be counter-mounted or wall-mounted dependent on architectural design.

9.3.1.4 For the breakroom, double basin sinks must be counter-mounted, stainless-steel material with manual gooseneck faucets limited to 1.5 gpm.

9.3.1.5 Mop sinks must be floor-mounted, terrazzo material with a stainless-steel rim guard and a manual faucet limited to 1.5 gpm. Additional accessories such as a wall-mounted mop rack must be provided adjacent to each mop sink.

9.3.1.6 Showers must be prefabricated stall type with 1.8 gpm flow head and valve controls.

9.3.1.7 Electric water coolers must be bi-level wall-mounted type with a sensor operated bottle filling station. Provide adjacent to restroom groups and physical readiness training.

9.3.1.8 Breakroom accessories must include the following: an ice maker box for each refrigerator and a 0.5-inch cold water line connection for a countertop owner furnished device such as a coffee maker.

9.3.1.9 Floor drains must be square with grated covers and a deep seal trap guard.

9.3.1.10 Floor and wall cleanouts must be provided as required in accordance with IPC, Ch.7. Floor cleanout covers must be rated for the expected traffic duty as required.

Section 01 02 00.00 48 Part 9 - Page 3 of 7 Certified Final

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9.3.1.11 Existing roof drains are to be reused unless roof area to be replaced during construction. For disturbed drains, provide new piping, insulation, and overflow drains. Roof drains and drain piping must be protected during construction.

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9.3.1.12 No new non-freeze wall hydrants must be provided. The existing fixtures are sufficient for building use.

9.3.2 Domestic Water Heating Systems.

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9.3.2.1 For B100 ARC, the existing tankless water heater will remain to serve the kitchen and restroom lavatories utilizing the existing pipe mains and existing recirculation pump. At the shower group, provide an electric storage type water heaters in the janitors closet. Due to the proximity of fixtures, hot water recirculation is not required. Domestic water heating is to be electric, and water must be stored at 140 degrees F. The building hot water supply temperature for the fixtures must be 110 degrees F provided through a mixing valve assembly. Additional point-of-use instantaneous electric water heaters are required at remote restrooms.

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9.3.2.2 For B101, electric storage type water heaters must be provided in the mechanical room. Provide heat-pump type. Domestic water heating must be electric, and water must be stored at 140 degrees F. The building hot water supply temperature for the fixtures must be 110 degrees F provided through a mixing valve assembly. The hot water supply temperature for the kitchen fixtures and equipment (except hand sinks) must be 140 degrees F. Provide new recirculation pump.

9.3.2.3 Solar domestic water pre-heating systems are not life cycle cost effective for this facility.

9.3.2.4 The domestic hot water system must be sized to provide adequate hot water for all fixtures that require hot water, including emergency eyewash/showers, lavatories, sinks, showers, etc.

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9.3.2.5 As required in Section 9.3.2.1 and 9.3.2.2, the domestic hot water system must be served by a recirculation system to provide hot water at remote fixtures continuously when the building is occupied. Provide scald protection at each fixture or group of fixtures. Connect the recirculation pump to the building DDC automatic control system and control to schedule operation during occupied periods. The DDC system must have the capability of monitoring and controlling domestic hot water circulation pumps and the temperature of domestic hot water.

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9.3.3 Emergency Eyewashes and Showers.

9.3.3.1 Provide combination emergency eyewash and shower stations throughout maintenance work bays and Battery Room where charging occurs within the vehicle Maintenance Shop, and provide an emergency eyewash in mechanical rooms where water treatment chemicals are present to meet the requirements of ANSI Z358.1, and OSHA. A thermostatic mixing valve must be provided to supply tepid water to the emergency shower and eyewash. Demolish existing units and appurtenances.

9.3.4 Vibration/Noise Isolation.

9.3.4.1 Water hammer arrestors must be used to minimize water system noise.

9.3.4.2 Air compressors must be mounted on vibration isolating springs.

9.3.5 Compressed Air System.

9.3.5.1 For B101 VMS, demolish existing air compressor system. Provide new complete air compressor system. Compressed air system must be UL listed and at a minimum composed of duplex compressors, receiver, aftercooler, distribution piping, piping drops and filter regulator units. System compressor, aftercooler, and receiver must be located in the mechanical room within the Vehicle Maintenance Shop’s Mechanical Room. System must be designed for a working pressure of 125 psi. The compressed air system must be sized to accommodate the number of drops required with a maximum total pressure drop of 5 psi. Each compressed air drop must be sized to provide 30 scfm. Compressor must be sized for full connected load with a 60% diversity allowance. Provide a line size ball type shutoff valve, pipe drip with ball valve drain, a line oiler, a coalescing oil/water filter, and a pressure regulator upstream of each air drop or connection to equipment. Air drops must be provided with quick disconnects.

Contractor must coordinate quick disconnect requirements with the Contracting Officer.

Provide one outlet with hose reel within each maintenance bay, total of 6 drops. Provide an additional outlet within the equipment alcove area. Provide exterior rated hose reel on each end of the building

9.4 PIPING SYSTEMS.

9.4.1 Domestic Water Systems

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9.4.1.1 A separate domestic water service is existing in the mechanical room and requires a new riser. Isolation shutoff valves must be provided. Buildings must be individually metered with the meter located inside the mechanical room of each building.

Refer to Civil Section Part 3 of this section for site utilities and advanced meter requirements. Provide a reduced pressure zone backflow preventer in each incoming domestic water service. Plumbing piping must be sized to accommodate flush valve plumbing fixtures. Under slab supply piping must be limited to the domestic water service entrance only. Water service to VMS B101 is served from B100. Water availability to B101 must be generally continuous during construction at B101.

Provide new smart water meter and connect to building automation system.

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Section 01 02 00.00 48 Part 9 - Page 4 of 7 Certified Final

AMENDMENT 0006

9.4.1.2 The domestic water piping must be extended to fixtures, outlets, and equipment. The domestic hot water and cold-water piping must be arranged and installed to permit draining. The supply piping to each piece of equipment or fixture, except faucets, flush valves, or other control valves which are supplied with integral stops, must be equipped with an accessible shutoff valve to enable isolation of the item

Section 01 02 00.00 48 Part 9 - Page 5 of 7 Certified Final for repair and maintenance without interfering with operation of other equipment or fixtures. Supply piping to fixtures, faucets, hydrants, shower heads, and flushing devices must be anchored to prevent movement. Insulate all domestic cold water, domestic hot water and recirculating water systems.

9.4.1.3 The water heater sizes must be based on ASHRAE guidelines for the specific building occupancy and usage. Water heaters must comply with the energy conservation requirements of ASHRAE Standard 90.1. Water heaters must be provided with fully automatic controls with safety relief valves.

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9.4.1.4 For storage tank water heaters, provide a master mixing valve immediately downstream of the storage tank to lower water supply temperature. Temperature range to be maximum 131 degrees F and minimum 122 degrees. Provide a recirculation pump as required in Section 9.3.2.1 and 9.3.2.2. At lavatories, sinks, and shower heads, providing mixing valve to further lower temperature to 110 degrees F.

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9.4.1.5 Provide a line sized isolation valve at each branch connection. Locate the valve as close as possible to the branch takeoff.

9.4.1.6 Access panels/doors must be provided for valves and appurtenances of the plumbing system located behind hard walls or ceilings.

9.4.2 Sanitary Drain, Waste, and Vent Piping Systems.

9.4.2.1 Refer to Civil Section Part 3 of this section for site utility requirements. Piping system runs within the building are to be kept as short as possible. Metallic or PVC vent piping must be used through the roof from at least 6 inches below the roof to the required point of termination above the roof.

9.4.2.2 All lavatory and sink drains and P-traps must be coordinated with millwork to isolate drains. The building sanitary sewer must be designed in accordance with the International Plumbing Code. Coordinate location of floor sinks and floor drains for floor sloping requirements. Floor sinks and floor drain traps subject to loss of seal by evaporation must be equipped with trap primers except the equipment drain in Weapons Vaults. The equipment drains in Weapons Vault traps will be protected by a trap sealer in lieu of trap primers. Provision must be made to collect condensate from the condensate drains and drain to the sanitary sewer system.

9.4.2.3 Provide floor drains in mechanical rooms near each boiler, air handling unit, pumps, and water heater. Provide floor drains at toilet groups, shower drying areas and within individual toilet rooms for new restroom layout.

9.4.2.4 Provide full size cleanouts in building sewers outside of the building, and on the interior within 5 feet of the exterior building wall. Cleanouts located below grade must be extended to grade level so that the top of the cleanout plug is at or above grade.

Cleanout locations and installation must comply with International Plumbing Code.

9.4.3 B100 ARC Systems

Section 01 02 00.00 48 Part 9 - Page 6 of 7 Certified Final

9.4.3.1 Floor drains and sanitary piping in mechanical room are collapsed. Provide new floor drain and sanitary piping layout within mechanical room. Temporarily relocate and reinstall existing equipment as needed for repairs.

9.4.3.2 Provide a sump pump for new elevator pit drainage. If hydraulic elevator is used, provide an oil water separator or oil minder system to detect oil. Comply with IPC and other referenced criteria. Sump must be sized and installed per ITG 2013-01.

Minimum capacity must be 50 gpm. Hydraulic elevator installations must be provided with audible and visual alarm indicators installed in the elevator machine room.

9.4.3.3 For new Fire Pump Room, a new floor drain must be installed for the fire pump.

9.4.4 For B100 Kitchen, replace fixtures including hand sinks, scullery sinks, floor drains, and trench drains. Replace existing natural gas stove, fryer, and cooktop with electric type. Demolish existing and provide new piping, valves, insulation, hangers and appurtenances for the following connections:

- Domestic hot water and cold water connections to hand sinks, scullery sinks, and dishwasher.

- Direct sanitary connections to hand sinks.

- Indirect sanitary drains for scullery sinks and dishwashers.

Repair or replace flooring for new drains.

9.4.5 Maintenance Bay Systems

9.4.5.1 Provide new water service to the maintenance work bays. Water system must be supplied from the domestic water system and each drop must be provided with hose bibbs with integral vacuum breakers. System must be sized per International Plumbing Code and must meet all of the requirements of the domestic water system.

Provide a line size isolation valve upstream of each water drop. Insulate all cold water systems. Provide one outlet within each maintenance bay, total of 3. Provide an additional outlet within the equipment alcove area.

Amendment 0005*******************************************************************************

9.4.5.2 Replace existing trench drains and integral sand interceptor in service bays. Trench drains and drainage from wash bays must be connected to oil/water separators before discharging to the sanitary sewer.

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9.4.5.3 Provide floor drain at eyewash/safety shower locations except those located within Battery Rooms where charging occurs.

9.4.5.4 Provide an exterior non-freeze hose bibb at each end of the facility.

9.4.6 Natural Gas Piping System.

Section 01 02 00.00 48 Part 9 - Page 7 of 7 Certified Final

515372 Repair of Bldgs. 100 ARC & 101 VMS Des Moines, Iowa

9.4.6.1 For each building, reuse the existing natural gas piping to existing equipment.

New natural gas burning equipment is not allowed in accordance with the Electrification Executive Order (EO) 14057.

9.4.6.2 For the ARC, incoming natural gas pressure after the main meter is 10 psig.

Provide new building regulator to step the pressure down to 2 psi. Replace natural gas piping in the mechanical room. Adjust or replace existing regulators to existing boilers, water heaters, and DOAS units. New natural gas piping must be sized for a minimum pressure of 2 psig at inlet to the buildings. Natural gas piping must be sized in accordance with the Applicable Criteria. Design building gas piping distribution system based on a 2 psig pressure downstream of the gas meter and pressure regulator.

Natural gas service to VMS B101 is served from ARC B100. Natural gas availability to VMS B101 must be generally continuous during construction at ARC B100.

Provide new smart water meter and connect to building automation system.

9.4.6.3 The gas piping from the gas meter to the equipment must be black steel with fittings of malleable iron. Piping connections to all gas burning equipment must be made with rigid pipe and fittings. All gas risers must be anodeless.

9.4.6.4 A ball type gas shutoff valve and union must be provided in an easily accessible place in the gas line to each gas-fired equipment item. Provide a drip leg upstream of the isolation valve.

AMENDMENT 0006

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Section 01 02 00.00 48 Part 11 – Page 1 of 14 Certified Final

11.1 DESIGN CRITERIA.

11.1.1 The HVAC systems must be designed in compliance with Applicable Criteria located in Part 2 of this section.

11.1.2 As a minimum, HVAC control schematics and sequences must meet the requirements of ASHRAE Standard 90.1, Energy Standard for Buildings – Except Low- Rise Residential Buildings and UFC 3-410-02 Direct Digital Control for HVAC and Other Building Control Systems. Provide system enhancements beyond the minimum requirements of ASHRAE Standard 90.1 as required to meet energy conservation requirements in Section 01 02 00.0048 Part 12 - Energy Conservation.

11.1.3 The Contractor is responsible for obtaining any available rebates from the utility and crediting those rebates to the Government in the bid.

11.1.4 Piping systems must be identified per ANSI requirements. Equipment must be identified with engraved and laminated plastic nameplates or black lamicoid sheets with white lettering. VAV units or similar units must be labeled at their underside to allow identification after installation with laminated tags on the ceiling grid below for locating.

Valves must be provided with tags and indexed to a master schedule.

11.1.5 Heating installations must include pressure stack natural-draft Class B vent or venting suitable for condensing flue gases in accordance with NFPA 54 and local codes.

11.1.6 The design of HVAC systems with respect to noise and vibration control must be in accordance with ASHRAE HVAC Applications and UFC standards for maximum Noise Criteria values.

11.1.7 Exhaust vents for all buildings must have low leakage dampers and be located at least 15 feet from outdoor air intakes in accordance with UFC 4-010-01 and USAR Design Guide – USAR Facilities requirements to prevent short-circuiting of exhaust air.

11.1.8 All materials and equipment must be the standard cataloged product of manufacturers regularly engaged in production of such materials and equipment and must be the manufacturer’s latest standard design.

11.1.9 The Contractor must comply with minimum Antiterrorism/Force Protection criteria in accordance with UFC 4-010-01 requirements to include locating outdoor air intakes at least 10 feet above grade with low leakage dampers. Contracting Officer will approve the locations of the emergency air distribution shut-off switches. Switches must be located as per UFC 4-010-01.

PART 11

HVAC DESIGN

Amendment 0006

Section 01 02 00.00 48 Part 11 – Page 2 of 14 Certified Final

11.1.10 Roof-mounted equipment is permitted at this facility only when replacing existing equipment or with COR approval. Coordinate new roof equipment and any new penetrations with new roof manufacturer to maintain warranty. Perform structural analysis to confirm equipment changes on the roof.

11.1.11 Equipment installation and location must accommodate manufacturer’s recommended and required service and maintenance clearances and comply with code requirements. Sufficient space must be provided for the following: changing filters;

cleaning or removing coils; replacement of fans, motors, and coils; access to valves, fan belts, shafts, and controls; and other operations as required to maintain the systems.

Mechanical and equipment room layouts must facilitate ease of maintenance. The bottom of suspended ductwork, piping, and equipment located in the mechanical or equipment rooms must not be lower than 7 feet above finished floor except as approved by the Contracting Officer’s Representative.

11.1.12 Means must be provided to access equipment for maintenance without damage to other building components, or removal of other equipment, including providing and installing ladders, catwalks, or platforms as necessary. Maintenance access must be fixed and must not require the use of cranes or lifts. Components on suspended equipment that require maintenance or service must be easily maintained, repaired, or replaced from the access point. Suspended equipment requiring maintenance must be less than 10’-0” above finished floor.

11.1.13 Provide access doors for access to all components requiring inspection, cleaning, or removal. Means must be provided to allow maintenance staff to easily and quickly find above-ceiling (or otherwise hidden equipment) or other system components requiring replacement or maintenance.

11.1.14 Coordinate building construction and equipment installation to allow replacement of equipment without damage to the building systems or components or removal of other equipment.

11.1.15 Where multiple items of equipment are collocated within a single exterior enclosure, ensure adequate clearance is provided for operation of the equipment, including but not limited to, airflow for chillers, condensing units, or cooling towers, without affecting system capacity. This includes maintaining code-required and manufacturer recommended clearances for maintenance and airflow.

11.1.16 Install all HVAC equipment in accordance with the manufacturer’s installation requirements and recommendations.

11.1.17 Select mechanical equipment utilizing replacement HFC-type refrigerants unless the equipment is only available with HCFC-type refrigerants. Equipment utilizing CFC-type refrigerants must not be used. The Government preference is to not utilize HCFC-22 and other HCFC-type refrigerants. Equipment utilized R-410A and R-22 are not allowed.

11.1.18 Do not route any mechanical piping or ductwork through an electrical room, TER or TR room, nor stairwell unless specifically serving that room. Equipment must not be located over the IT rack, equipment, nor cable tray.

Section 01 02 00.00 48 Part 11 – Page 3 of 14 Certified Final

11.1.19 Systems that are not reused must be demolished. This includes abandoned piping, hangers, insulation, electrical connections, and appurtenances.

11.1.20 New natural gas burning equipment is not allowed in accordance with the Electrification Executive Order (EO) 14057.

11.2 DESIGN CALCULATIONS.

11.2.1 Load Calculations. Provide a design narrative and calculations as indicated in the Army Reserve Design Process and Submittal Requirements. Heat gain and loss calculations must be, at a minimum, in accordance with the current edition of the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) Handbook of Fundamentals and the latest edition of the ASHRAE Cooling and Heating Load Calculation Manual. The load calculations must be in accordance with ASHRAE Non-residential Cooling and Heating Load Calculations. Calculations must be performed on a room-by-room basis. Heating load calculations must not consider lights or internal loads as supplementing the heating system. Clearly describe the features of the systems being used. Demonstrate compliance with ASHRAE 90.1 by completing the compliance forms available from ASHRAE. Summarize the outdoor and indoor design conditions used. State the design objectives and design assumptions to provide a comfortable building environment within ASHRAE 55 requirements. Outline design decisions made that affect the operation and maintenance of the systems. Provide all calculations used to support equipment selections, including but not limited to items such as; hydronic piping analysis, duct design analysis for air handler selection, air separator selection, utility service piping selection, boiler and chiller loads, duct static pressure drop, pipe static pressure drop, psychrometric charts for any system conditioning outside air, etc.

Refer to AF Design Guide for complete list of calculations that must be submitted.

Calculations must be checked for accuracy and initialed or signed by the design professional. The method of zoning the building spaces used for computerized building load calculation input must be clearly shown as part of the calculations.

11.2.2 The cooling coil load must be calculated at the 1.0 percent dry bulb / mean coincident wet bulb (MCWB) temperature cooling outside design condition and the 1.0 percent humidity ratio / mean coincident dry bulb (MCDB) temperature. The equipment must be designed for the greater of the two cooling loads.

11.2.3 Dedicated outdoor air units or energy recovery units must be selected at the outdoor condition indicated in the ASHRAE Fundamentals Handbook at the 0.4% outdoor peak dewpoint and MCDB condition.

11.2.4 Outside Design Conditions. Obtain outside design conditions for cooling and heating from the ASHRAE Handbook – Fundamentals, and in accordance with USAR Design Guide – USAR Facilities. The 1% dry bulb temperature with mean coincident wet bulb temperature must be used for the cooling outside design condition.

The 1% Humidity Ratio (HR) and corresponding mean coincident dry bulb temperature must be used for the high wet bulb cooling outside design condition. The 99% dry bulb temperature must be used for the heating outside design condition.

Section 01 02 00.00 48 Part 11 – Page 4 of 14

11.2.5 Heating and Cooling – Design Conditions: Refer to USAR Design Guide –

11.3 HVAC SYSTEMS – ARMY RESERVE CENTER (ARC)

11.3.1 Boiler System

AMENDMENT 0006

515372 Repair of Bldgs. 100 ARC & 101 VMS Des Moines, Iowa Amendment 0006*******************************************************************************

USAR Facilities for Specific Space Criteria including space setpoints. Provide humidification to maintain minimum 30% relative humidity for space setpoint.

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11.2.6 Occupancy Loads: The sensible and latent loads for the occupied spaces must be in accordance with the ASHRAE Handbook – Fundamentals. The number of people must be determined by user interviews and verified using USAR Design Guide – USAR Facilities and ASHRAE recommendations and requirements.

11.2.7 Lighting Load: Fixture count and heat release data must be used to calculate the lighting cooling loads in each space.

11.2.8 Equipment Loads: A 1.5 watt per square foot allowance must be included for open office spaces. A 200-watt allowance must be included for each computer workstation in private and semi-private offices and Learning Centers. A 100-watt allowance must be included for each desk and instructor position indicated on the furniture plans to accommodate laptop computers in classrooms. These equipment loads are for minimum estimation only and must be verified and updated by the user during design.

11.2.9 Thermal Zones: Supply air must be distributed to each zone using terminal box - either VAV terminals reheat coil or 4-pipe Fan Coil Units. The terminal box modulates the airflow into the zone to maintain the zone space temperature setting.

Individual thermostat control must be provided for each terminal box. The classrooms, simulator room, and conference rooms must have dedicated terminal boxes. Offices must be grouped such that one terminal box serves a maximum of four (4) individual offices with similar heat loads. The command suite must provide individual controls for each office space. Other building spaces with similar heat loads, occupancy and schedule may be grouped together with control areas not to exceed 2,000 square feet.

Spaces with excessive heat loss/gain or spaces affected by solar radiation at different times of day must be independently controlled with a separate terminal box. The boxes must be installed to be easily accessible for maintenance personnel.

11.2.10 Refer to USAR Design Guide – USAR Facilities and UFC 3-410-01 for ventilation requirements, such as within toilets, showers, mechanical rooms, unit storage areas, arms vaults, vehicle maintenance bays, kitchen, and other specific areas. Provide a minimum of 50 CFM to TC/TR rooms for pressurization.

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11.2.11 Life Cycle Cost Analysis: The DOR is not required to complete a Life Cycle Cost Analysis for the HVAC system unless DOR proposes to deviate from the direction provided in the RFP.

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Section 01 02 00.00 48 Part 11 – Page 5 of 14

515372 Repair of Bldgs. 100 ARC & 101 VMS Des Moines, Iowa

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11.3.1.1 Two existing natural gas-fired boilers provide heat for the building. Provide one additional boiler such that the building heating load provided by any two boilers. The new boiler must be electric type. Existing boilers have 1087.5 MBH output capacity.

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11.3.1.2 The new boiler must have an inline primary boiler circulation pump if required by the boiler manufacturer. The existing pump system is a primary/secondary variable speed system with standby variable speed secondary pump. The pumping system is existing to remain. Piping must be modified to accommodate the new boiler. System must be designed in accordance with the boiler manufacturer’s recommendations.

11.3.1.3 Boiler and heating hot water piping in the mechanical room to be resized such that the mains can provide heat for the entire building heat load, including the existing natural gas and electric heat systems. Provide taps in mechanical room for the addition of a future boiler.

11.3.1.4 Demolish existing heating hot water piping and insulation. Provide new piping, insulation, valves, hangers, and appurtenances. Piping must be routed to the various spaces through the hot water heating piping system with distribution to the air handling units, Dedicated Outside Air Unit, Fan Coil Unit, VAV terminal reheat coils, cabinet unit heaters, and unit heaters.

11.3.1.5 Glycol must not be used for the heating hot water system. The control sequence must be updated such that the boiler pumps run at a minimum flowrate during ambient freezing conditions. For any unit serving outside air, the hot water control valve must fully open to allow water to flow through the coil. For any unit serving outside air, a freezestat and sequence must be provided.

11.3.1.6 The hot water supply and return temperatures must be 140 F and 110 F.

11.3.2 Chiller System

11.3.2.1 The existing chilled water system includes a split air-cooled chiller with one evaporator and two condensers, distribution pumps, and appurtenances. The split chiller and associated piping, power, and controls must be demolished. Return existing chilled water pumps to owner. Existing expansion tank, air separator, and buffer tank may be reused if adequately sized for the new system loads. If not properly sized for the system, provide new units.

11.3.2.2 Two packaged air-cooled scroll or rotary screw water chillers, located on grade adjacent to the building, must provide cooling for the building. Each chiller must be sized for 50% of the building load. Piping into the building must be routed underground.

Chilled water system must be sized to serve the rooftop units, fan coil units, new DOAS units, and any other system using chilled water cooling. The chilled water supply temperature must be 44 degrees F, and the chilled water return temperature is 58 degrees F.

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11.3.2.3 Provide a single-loop variable speed pumping system with three variable speed pumps, each with its own variable frequency drive. The pumps must be configured in lead/lag/stand-by. Each pump must be sized for 50% of the flowrate.

11.3.2.4 Within the mechanical room, provide taps on exterior piping for temporary chiller connections. Provide manual isolation valve and removable cap at connection.

11.3.2.5 Propylene glycol must be used to provide chilled water freeze protection.

New pumps must be utilized. Contractor must design and install the proper percentage of glycol antifreeze required for specific outdoor design conditions, applicable system use, and in accordance with glycol manufacturer’s recommendations for application freeze or burst protection. All coils must be selected and de-rated based on the design percentage of glycol.

11.3.3 Rooftop Units

11.3.3.1 The two-story annex addition is served by existing DX cooling rooftop units (RTU) with hot water VAV boxes. RTU s and VAV boxes must be demolished including ductwork, piping, valves, electrical connections, controls, insulation, hangers, and appurtenances.

11.3.3.2 The renovated addition must be served by two rooftop units, installed at the existing locations on the roof. The central Variable Air Volume (VAV) Air Handling Units (AHU) must use chilled water cooling (from Chiller System Section 11.3.2) and hot water heating with reheat (from the Boiler System notated in Section 11.3.1) at the VAV terminal units. Provide economizer control and operation for the VAV air handling units.

Section 01 02 00.0048 Part 12 - Energy Conservation further details the energy requirements of this project.

11.3.3.3 Rooftop units must be installed on an insulated curb and be configured to reuse existing ductwork opening. Provide insulated curb opening for pipe connections.

11.3.3.4 Provide manual isolation valves and motorized two-way control valves at hot water VAV boxes.

11.3.3.5 Return air must be fully ducted back to the rooftop unit.

11.3.4 Provide equipment and controls to maintain a slightly positive building pressure. Ventilation must comply with ASHRAE Standard 62.1 – Ventilation for Acceptable Indoor Air Quality. Contractor may utilize means to dynamically reset the outside air requirements for demand-controlled ventilation.

11.3.5 Fan Coil Unit with DOAS

11.3.5.1 Refer to drawings for areas served by Fan Coil Units (FCUs). Provide new fan coil units, zoned per requirements of this document. New fan coil units must utilize chilled water cooling and hot water heating. Units must be located above ceiling, either cassette type or ducted type, and be low-profile type to prevent lowering of ceiling. FCUs must have MERV 8, disposable filters.

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11.3.5.2 Existing fan coil units, piping, valves, electrical connection, controls, and appurtenances must be demolished. The walls must be infilled and repaired to match existing. The existing motor-operated control valves may be reused if less than 5 years old, in proper working order, and sized appropriately for flow rate.

11.3.5.3 The existing Dedicated Outside Air System (DOAS) units are newly installed and will be reused. Ductwork within zone must be extended to new fan coil units and re-balanced.

11.3.5.4 For areas served by fan coil units without an existing DOAS, provide new roof-mounted DOAS. The DOAS unit will have chilled water cooling and hot water heating. Air must be filtered by MERV 8 pre-filters and MERV 13 final filters. Outside air must be ducted to fan coil units at a minimum of 50 CFM per unit.

11.3.6 Heated Storage spaces are heated by existing hot water unit heaters. Unit heaters and 2-way valves are existing to be reused. New hot water supply and return piping is required.

11.3.7 Restrooms must be exhausted using existing ductwork and exhaust fans.

Provide new exhaust grilles and rebalance for new layout. Make-up air must be provided from adjacent spaces as transfer air. For restrooms with exterior walls, provide supplemental heating via hot water unit heaters for comfort heating.

11.3.8 The locker rooms must be directly air conditioned from the central air handling system or fan coil units, depending on location. The toilet and shower areas must not be directly air conditioned. Air must be transferred from the locker rooms into these areas. Exhaust fans must relieve air from these spaces maintaining a slight negative pressure for odor control.

11.3.9 Provide HVAC systems in the electrical and TR(s) spaces to meet the HVAC requirements of TIA-569, including the Class B requirements for temperature and humidity as outlined in ASHRAE Thermal Guidelines for Data Processing Environments 4th Edition. Specific humidification and/or de-humidification is not required. Provide each space with its own independent thermostat for climate control. Provide each space with positive atmospheric pressure to minimize dust. Temperature set points in each space to match building admin space temperature set points.

11.3.10 Provide hot water heating cabinet unit heaters for the vestibule areas.

Demolish existing heaters including piping, insulation, electrical connections, controls, and appurtenances.

11.3.11 Provide hot water unit heaters for mechanical rooms for freeze protection.

Demolish existing heaters including piping, insulation, electrical connections, controls, and appurtenances.

11.3.12 Provide cabinet electric unit heaters in stairwells for freeze protection.

Demolish existing heaters including piping, insulation, electrical connections, controls, and appurtenances.

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515372 Repair of Bldgs. 100 ARC & 101 VMS Des Moines, Iowa

Amendment 0004*******************************************************************************

11.3.13 For the kitchen, demolish the existing range hood and make-up air unit.

Provide a new exhaust hood, new general exhaust, and new dishwasher exhaust.

Provide new exhaust hood fan and grease ductwork. Outdoor air makeup ventilation must be supplied to the kitchen via a new makeup air unit located on the roof. The Make-up air unit will have hot water heating and chilled water cooling. The kitchen area must be maintained slightly negative with respect to the surrounding rooms.

Provide new ductwork, air terminals, piping, and appurtenances required for a fully operational kitchen.

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11.3.14 For vault areas, provide new wall or shelf-mounted, automatic self-contained dehumidifier. The dehumidifier must have condensate drainage to above ceiling and routed to the mechanical room floor drain or mop sink.

11.3.15 For Physical Training, Provide minimum of 20CFM per person of ventilation and exhaust airflow. Provide sufficient cooling for rigorous activity.

11.3.16 If elevator type is selected such that there is an elevator equipment room.

Provide dedicated cooling and ventilation for equipment in accordance with the elevator manufacturer’s requirements.

11.3.17 The mechanical room, electrical rooms, and fire pump room must be ventilated using exhaust fans and an intake louver or roof hood. Mechanical room ventilation fans must have adequate capacity to limit dry-bulb temperature to a maximum of 10 degrees F above outdoor dry-bulb temperature when the sum of equipment and ambient load is at maximum peak. Mechanical room ventilation fans must start and operate when the space temperature exceeds 80 F. The existing intake louver serving mechanical room is less than 10’-0” above grade and thus is not in compliance with UFC 4-010-01 requirements. Wall opening to be insulated and infilled to match existing wall exterior.

11.4 HVAC SYSTEMS – VEHICLE MAINTENANCE SHOPS.

11.4.1 Heating hot water is provided by two wall-mounted natural gas boilers. The boilers are newly installed and in excellent condition. The boilers, pumps, expansion tank, and air separator are existing to remain and be reused. The piping and valves within the mechanical room will also be reused. The boiler system will serve the heating coils for the make-up air units, fan coil unit, and hot water unit heaters.

11.4.2 Electric or hot water heaters suspended from the roof structure must provide heat for the maintenance bays. Destratification must be installed in each bay for comfort cooling, sized to avoid strobing effect with lighting.

11.4.3 Office and administration heating and cooling must be provided through single zone hot water fan coil unit with DX refrigerant cooling and remote grade mounted air-cooled condensing unit. Ventilation for units to be supplied through outside air connection to mixing box of fan coil unit. Provide a transfer fan to pressurize the vestibule maintaining separation between the office and maintenance bay areas.

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11.4.4 The controlled waste and flammable storage rooms must be heated using explosion-proof electric unit heaters with remote wall-mounted thermostats and must be ventilated with explosion-proof exhaust fans in accordance with NFPA 30. Air inlet and exhaust openings must be at a low level in these rooms arranged to provide air movement across all portions of the floor to prevent accumulation of flammable vapors.

11.4.5 Provide hot water unit heaters for mechanical rooms for freeze protection.

Demolish existing heaters including piping, insulation, electrical connections, controls, and appurtenances.

11.4.6 Toilet rooms must not be directly cooled. Air must be transferred from the adjacent ceiling plenum spaces or rooms into these areas. Toilet rooms located at the perimeter of the building must have supplemental hot water baseboard heating.

11.4.7 Tool, parts and supply rooms must be heated with a dedicated single zone gas-fired furnace. Ventilation for units to be supplied through outside air connection to furnace.

11.4.8 The existing communications cabinet is existing to remain and does not require additional cooling.

11.4.8.1 If bid option including a new Telecommunications Room is awarded, provide a dedicated cooling system in accordance with Section 11.3.9.

11.4.9 Exhaust Systems.

11.4.9.1 Provide individual exhaust systems at each vehicle maintenance bay within the Vehicle Maintenance Shop with individual hose reel drops for each exhaust fan, one fan per bay. Each fan must be controlled by a manually operated switch located within the wheeled vehicle bay served by the fan. Each fan must be sized to serve the anticipated vehicles being maintained, but each fan must not be below 1,400 cfm. Where possible hose reel exhaust should be routed out through the exterior walls and not through the roof.

The terminal hoses must be of sufficient flexibility and length and have appropriate hose connectors to adequately serve the units' vehicles. Designer of Record must review range of vehicles requiring maintenance and size hoses and fans to provide adequate ventilation. Provide one bay with minimum 3,000 CFM flowrate rated for 900 degrees F.

Refer to USAR Design Guide – USAR Facilities.

Makeup air for the individual vehicle tailpipe exhaust must be provided by a wall-mounted intake louver and interlocked damper. This air must be tempered by a hot water make-up air unit. Makeup air may also be provided by the general exhaust system variable flow makeup air unit. A duty cycle of 50% of the capacity of the vehicle exhaust can be considered.

11.4.9.2 Provide a variable flow general exhaust system for the vehicle maintenance bays within the Vehicle Maintenance Shop. Exhaust must be located low in the space and sweep the entire area. The general exhaust system must be equipped with variable frequency drives. The general exhaust system must be sized for a minimum of 1.5

Section 01 02 00.00 48 Part 11 – Page 10 of 14 cfm/sq. ft. Connect the system to the BAS controls for operation and provide a manual “Hand” switch to allow the general exhaust and interlocked makeup air systems to operate manually when the bays are in use. The system must operate at a reduced ventilation rate in accordance with code requirements and AR Design Guide during normal operation.