SOW _ Bldg 170 Boilers and Pumps Replacement.pdf

S T A T E M E N T OF W O R K

For

VGLZ 192044

Building 170 Replace Boilers and Pumps

Selfridge Air National Guard Base, Michigan

Prepared by: Tom Resh 02 March 2020

STATEMENT OF WORK

FOR

Building 170 Replace Boilers and Pumps

Selfridge Air National Guard Base, Michigan

The contractor shall schedule and perform a construction task for the replacement of the existing Building 170 heating boiler system. The Contractor will provide a complete and operable boiler system at building 170. The boiler shall be high efficiency condensing boiler. The design basis for this boiler shall be quantity (2) - 300 MBH Lochinvar Series KHN or equivalent in line with The Selfridge ANG Base Design Standards. The installation and replacement shall include but is not limited to all piping connections, venting, power connections, boiler pumps, hot water pumps, and system start-up and validation. These new pumps and boilers will operate on a loop with the lead / lag configuration which will require some piping changes from the existing configuration.

The hot water and cold water circulation pumps will be replaced. VFDs will be required on all new HHW pumps. CHW pumps and the freeze recirculation pump will not require VFDs.

The period of performance shall be (60) days. The contractor will perform ALL construction in Building 170 on the project in no more than (10) working days. The contractor will submit a detailed work schedule prior to construction that documents the completion in (10) working days or less. Weekend and off shift hours work may be required for this construction but is not preferred.

The existing boilers will be demoed and the new boilers will be installed in the approximate position of the old boilers. Installation drawings and design drawings are provided as schematics for this installation work. The contractor and any subcontractors will perform site visits and site assessments prior to bidding and construction to cover all cost of the boiler and pump replacements and installation. The contractor is responsible for a complete assessment of all site conditions prior to bids and all cost will be included in the bid.

The installation will be in the same location as the original boilers and will use all of the same utilities connections such as: natural gas, electrical connections, installation pad.

Combustion air and exhaust will be modified and will be a wall-side mounted concentric and will be thru a new penetration by this contractor. Existing wall penetrations for intake and exhaust will be patched.

Contractor is responsible for all work effort in order to provide an acceptable final product that meets the requirements of the original system, the drawings and this Statement of Work (SOW).

The boiler replacement will meet design intent of the boiler heating system for the 170 Building.

All work performed under this SOW shall be conducted in accordance with all applicable local, state and federal laws, regulations, and codes, ANG policies and regulations, Base Standards , and the SOW as outlined below:

1. The tasks of this SOW are:

1. See Plans Dated 19 Nov 2020. (3 Sheets)

2. Demolish existing boilers and circulating pumps, to include termination of all piping connections, combustion air and exhaust. Demo of existing chilled water circulation pumps. Contractor is responsible for of site disposal and will track solid waste as required from the Selfridge ANG Base environmental engineering department. The existing combustion and exhaust air will be demoed.

3. Provide and install a total of (2) condensing boilers that have full modulation fire down to 20% of rated input with a turndown ratio of 10:1.

4. The contractor will install a concentric wall-side intake/ exhaust air pipe per the boiler manufactures requirements. The concentric will go through a new wall penetrations the existing wall penetrations will be abandoned wall openings and will be patched by this contractor.

5. The contractor will install (2) new main circulation pumps, main and standby, for the heating hot water system. These pumps will be in the same location as the existing HHW pumps. . Size of the pumps will be sized as like in kind for performance with a minimum design requirement of Bell and Gossett Series 60 or 1510. HHW Pumps will be VFD pumps. Wire the VFD’s to the controller located in the mechanical room. There are spare points available for these. Coordinated with Selfridge HVAC shop.

6. The contractor will install (1) new circulation (freeze) pump for the heating hot water circulator for the AHU coils. This pump will be in the same location as the existing. Size of the pumps will be sized as like in kind for performance with a minimum design requirement of Bell and Gossett Series 60 or 1510. This pump will be a direct replacement with no added VFD. New pump does not need to be bronze.

7. The contractor will install (2) new circulation pumps, main and standby, for the chilled water system. These pumps will be in the same location as the existing CHW pumps. Size of the pumps will be sized as like in kind for performance with a minimum design requirement of Bell and Gossett Series 60 or 1510. Power requirements will be the same as existing. CHW pumps will be a direct replacement with no added VFD.

8. The contractor will demo and replace (2) CHW storage tanks. New tanks will be in approximately the same location and will have the same function as the existing tanks.

8. Other DDC changes will be performed per the design drawings.

9. Install a Differential Pressure Sensor across the Supply and Return HW Pipes at a point furthest from the Pumps (South Lab-TU-7). Add DDC and wire the new pressure sensor to the controller located in the mechanical room. There are spare points available for these. Coordinated location with the COR and Selfridge HVAC shop.

10. The contractor will demo all existing expansion tanks, PRVs, chemical shot feeder and air separators. The contractor will install new floor mounted expansion tank, PRVs, shot feeder and air separators.

11. The contractor shall install the boilers in the same location as the existing boilers. If the boilers will not fit on existing equipment pad, the pad shall be extended as required to fit the boiler. It shall be installed in an orientation that minimizes the change of any adjacent equipment and piping, while still allowing proper access for maintenance.

12. The contractor will install isolation valves and unions at inlets/outlets of all pumps for ease of replacement.

13. The contractor will remove the existing vent piping connections and patch wall openings. All wall penetrations where the existing vents were shall be patched.

All abandoned wall openings will be patched by this contractor.

14. Install new concentric exterior wall mounted exhaust and combustion air unit for condensing boilers. New wall penetrations are required for installation of the new concentric intake and exhaust of the new condensing boilers. Boiler concentric devices will be wall mount flush type and separated by some distance per the mechanical code.

15. The new boilers shall be capable of controlling a variable speed boiler pump to keep a constant delta T at all modulation rates. The boiler shall have the capability to accept a 0-10 VDC input connection for DDC control of modulation or set point; enable disable of the boiler, variable system pump signal and a 0- 10VDC output of boiler modulation rate.

16. The boilers shall be equipped with a temperature and pressure gauge, high limit temperature control certified to UL353, ASME certified pressure relief valve, outlet water temperature sensor, return water temperature sensor, low water flow protection and built-in adjustable freeze protection.

17. The boilers shall be supplied with condensate neutralization kits. Condensate shall be routed to the nearest floor drain.

18. The hot water boiler (supply and return) piping shall be removed from the existing boiler to accommodate the new boiler installation. The hot water boiler piping shall be modified to a lead/lag configuration. See design drawings for reference of new piping configuration.

19. The contractor is responsible for providing all electrical and control work required for the boiler and pumps. There will be a main and standby pumps with a recirculation loop for both CHW and HHW systems.

20. The contractor will provide and install all valves and controls to switch between main and standby pump.

21. The contractor will flush and fill all HHW and CHW pipes in the system. All hydronic fluid will be removed and replaced and system will be flushed.

22. The contractor will reconnect all DDC controls for the HHW and CHW systems.

This reconnection will accommodate some changes the new systems to facilitate the lead/lag configuration of the systems.

23. Contractor shall perform manufacturer’s recommended start-up on the boilers and provide documentation of the start-up to the Government.

24. The contractor will perform a 3rd party TAB (Test and Balance) and a third party independent commissioning with a commissioning report submitted to the COR for approval by the KO.

25. Startup of all systems will be schedule with the COR and the KO. In order for the official startup to be accepted there must be a SIGNED daily report as generated by the COR and signed by the KO. This signed copy will be submitted by the government as the acceptance date to the contractor and the start or warranty.

26. The installation work will be routinely inspected by the 127 CES for quality management. Any deficiencies will be addressed by the contractor as they occur.

A final punch list will also be generated by the COR.

2. General Repair guidelines include, but are not limited to the following specifications and regulations:

1. Unified Facilities Criterion for DOD construction.

2. APPLICABLE STANDARDS: Latest published versions shall be used.

3. Mechanical systems – ASHRAE and SMACNA Standards, Including ASHRAE

90.1.

4. National Electric Code, NFPA No. 70

5. National Electric Safety Code (ANSI C2).

6. National Fire Protection Association (NFPA 101) Life Safety Code.

7. International Building Code (IBC).

8. Uniform Federal Accessibility Standard (UFAS)

9. International Mechanical Code (IMC).

10. International Plumbing Code (IPC).

11. Applicable State, City and County codes and regulations.

12. ANG Design Policy -Tab D, ANG ETL 01-1, Jan 2003 (Revised March 2004)

13. Selfridge ANG Base Design Standards

14. Occupational Safety and Health Administration standards

15. Michigan Occupational Safety and Health Administration Standards

3. Drawings and or stamped drawings by a Professional Engineer (P.E.) or a

Registered Architect (R.A.) are not required for this project.

4. Mechanical inspection is required of the completed system and the installation will be compliant with the Michigan Mechanical Code. The contractor will promptly correct any deficiencies found in the mechanical inspection at no added cost.

5. All hardware and equipment shall be comprised of new products based on what the manufacturer is currently manufacturing and have a spare parts pipeline available for at least five years after completion of contract.

6. Operation and Maintenance Manuals shall be provided, to include (but not limited to) spare parts list, operator’s manual, and contractors’ contact information and preventative maintenance schedules and recommendations. The contractor will include 3 binders to contain all the information/ warranties and one electronic copy.

7. Warranty: Contractor shall provide a one year warranty on workmanship of the entire construction project in addition to any manufacturer’s warranty on materials installed. The contractor will provide any commercial warranty on materials or equipment included in the construction that exceeds this one-year, all-inclusive warranty. The commercial warranty will be issued to the Government.

8. Submittals: Material submittals shall be submitted, reviewed, and approved prior to installation. The Government will review the submittals and provide comments/approval within 14 days. All comments shall be addressed prior to beginning construction. Also, any shop drawings that are required shall be submitted for Government review. The shop drawings review will be returned to the contractor within 14 days. Refer to AF Form 66 for any additional submittals.

9. There will be a site visit, prior to award to allow for site investigation. Any site visits post award shall be coordinated with the Government.

10. Record and or design drawings may be provided to the contractor as a courtesy at the discretion of the Government, but their accuracy is not guaranteed. The contractor shall do his own field investigations of the utilities and other items in the area and base his work accordingly. The Government assumes no responsibility for any conclusions or interpretations made by the Contractor based on the information made available by the

Government. Nor does the Government assume responsibility for any understanding reached or representation made concerning conditions which can affect the work by any of its officers or agents before the execution of this contract, unless that understanding or representation is expressly stated in this contract. These record drawings bear no such representation or understanding.

11. Contractor shall conduct an intensive field survey of all existing conditions. The contractor should survey existing conditions and correlate their work requirements accordingly. Contractor shall verify all dimensions, calculations and code requirements for all elements of work. The contractor is ultimately responsible for constructability and providing a complete and usable product at the completion of the project.

12. The disturbance of Asbestos-Containing Building Material (ACBM) is not anticipated during this project. However, if suspected ACBM is encountered, work in the immediate vicinity must stop and the Contracting Officer (CO) notified. After consultation with base personnel, the CO will direct further action to be taken. Work should proceed uninterrupted in unaffected areas of the project.

13. Based on the age of the buildings at Selfridge ANG Base, there is the potential for the presence of lead on painted surfaces. Best management practices must be employed to minimize dust and adequately protect workers from LBP exposure in accordance with OSHA and MIOSHA standards.)

14. Period of Performance shall be (60) calendar days from notice to proceed. Weekend work and off shift work be required during the allowed (10) day construction period. The contractor is required to complete the entire construction phase within (10) calendar days.

15. The contractor shall submit to the Contracting Officer a coordinated schedule indicating the sequence of operations for review prior to commencement of the work.

Currently base is open from Monday thru Friday 0630-1700 only. Any work outside these hours and on Federal Holidays must be requested at least 72 business hours in advance and then approved by the contracting officer. The federal holidays are listed below:

1. January 1st – New Year’s Day

2. Third Monday in January – Martin Luther King Jr. Day

3. Third Monday in February – Washington’s Birthday

4. Last Monday in May – Memorial Day

5. July 4th – Independence Day

6. First Monday In September – Labor Day

7. Second Monday in October – Columbus Day

8. November 11th – Veterans Day

9. Last Thursday in November – Thanksgiving Day

10. December 25th – Christmas Day

16. The facility will be occupied during this project. The Contractor shall fully cooperate with the other contractors and with Government employees and shall carefully adapt scheduling and performing the work under this contract to accommodate the additional work (of others), heeding any direction that may be provided by the Contracting Officer.

The Contractor shall not commit or permit any act that will interfere with the performance of work by any other contractor or by Government employees.

17. Temporary utilities (power, HVAC, lighting, etc.) will be required to support building use and functions during this project. Temporary hot water and chilled water shall be provided if boilers and pumps cannot be staged to maintain hot water and chilled water for the building. This system requires system hot boiler water and chilled water 24 hours a day and 365 days a year. There is no lag in heating water or chilled water requirements.

18. Egress: Do not close or obstruct walkways, corridors, or other occupied facilities without written permission from the contracting officer.

19. Life Safety

1. When demolition occurs in or near an occupied space, measures must be taken to protect the indoor air quality, reduce noise, limit vibration from cutting or chopping, reduce odors emanating from demolition debris, and mitigate dust infiltration from airborne particles and foot traffic.

2. Use water mist, temporary enclosures, and other suitable methods to limit dust and dirt rising and scattering in the air. Do not use water when it may damage existing construction or create hazardous or objectionable conditions such as ice, flooding, and pollution. Remove decayed, vermin-infested, or otherwise dangerous or unsuitable materials, and promptly dispose of them off-site.

Maintain adequate ventilation when using cutting torches.

3. Avoid unsightly conditions by cleaning adjacent structures and architectural finishes. Eliminate tractable dirt by wet-mopping floors and wiping down walls and doors of the demolition enclosure. Provide walk-off mats from the area of work to prevent dust from being tracked onto adjacent floor finishes. Do not use public corridors, lobbies, or hallways as staging areas. Damage to adjacent construction during demolition must be repaired and restored within 48 hours by the contractor.

20. Locate, identify, disconnect, and seal or cap off any utilities as necessitated by the project. Do not interrupt existing utilities serving occupied or operating facilities unless authorized in writing by the contracting officer. Arrange to shut off indicated utilities with respective providers. Provide at least 72 hours’ notice to the government if a shutdown of service is required during the changeover. Maintain services to remain and protect them against damage during the project.

21. At the conclusion of the project the Contractor will be responsible to compile and furnish to the Government, DD Form 1354, "TRANSFER AND ACCEPTANCE OF

MILITARY

REAL PROPERTY”, indicating all costs and quantity data of materials and systems furnished and installed. A draft DD1354 showing a list of ite e costs and quantity data is required will be furnished to the Contractor.

Requirements for: Antiterrorism / Operations Security / Information Protection

1. Access and General Protection/Security Policy and Procedures. This standard language is for contractor employees with an area of performance within Government controlled installation, facility, or area. The contractor shall comply with all applicable installation/facility access and local security policies and procedures, which may be obtained from the Contracting Officer’s

Representative (COR). The contractor shall also provide all information required for background checks to meet installation access requirements to be accomplished by the local installation’s

Security Forces, Director of Emergency Services or local Security Office. The contractor shall ensure compliance with all personal identity verification requirements as directed by DoD, HAF and/or local policy. Should the Force Protection Condition (FPCON) change, the Government may require changes in contractor security matters or processes.

2. For Contractors that do not require CAC, but require access to a DoD Facility and/or Installation.

Contractor and all associated sub‐contractors employees shall comply with adjudication standards and procedures using the National Crime Information Center Interstate Identification

Index (NCIC‐III) and Terrorist Screening Database (TSDB) (AFI 31‐101 and AFI 10‐245), applicable installation, facility and area commander installation/facility access and local security policies and procedures (provided by government representative), or, at OCONUS locations, in accordance with status of forces agreements and other theater regulations.

3. AT Level I Training. This standard language is for contractor employees with an area of performance within an Government controlled installation, facility or area. All contractor employees, to include subcontractor employees, requiring access Government Installations, Facilities and Controlled Access areas shall complete AT Level I awareness training within 10 calendar days after contract start date or effective date of incorporation of this requirement into the contract, whichever is applicable. Certificates of completion for each affected contractor employee and subcontractor employee will be maintained by the COR or Antiterrorism

Representative. AT level I Awareness Training is available at the following website:

http://jko.jten.mil