580-22-111 Statement of Work.docx

MICHAEL E. DEBAKEY VA MEDICAL CENTER

HOUSTON, TEXAS

Project Number: 580-22-111 Project Title: B100 heat exchanger and pressure reduction station repairs

SCOPE OF WORK

1. GENERAL:

a. Contractor shall provide all supervision, labor, material, tools and equipment to repair and/or replace components of the main heat exchanger system and pressure reduction station in mechanical room #8 in the basement of Building 100 at The Michael E DeBakey VA Medical Center, Houston TX.

2. PROJECT SCOPE OF WORK:

a. Components of the existing main steam to water heat exchanger system (which provides hot water to the AHUs for space heating), components of the steam pressure reduction station, and components of the condensate return system connected to the heat exchangers will be removed and replaced with new components. All new components shall be equivalent to, or better than, the existing items in functionality, capacity, and quality. The contractor shall provide submittals for all newly installed items to the VA for VA approval before purchase. All new components must be fully functional with the existing hospital equipment, including the building automation system (steam control valves for the heat exchangers are connected to Metasys). See attachments 1 and 8.

b. The pressure reduction station, which provides steam to the heat exchangers (and other equipment in the hospital not included in this project), is comprised of three branches. Each branch includes two main isolation gate valves and two pressure reduction valves, along with other associated components (gauges, strainers, pressure pilots, steam traps, etc.). The pressure reduction station is supplied with 125 PSI steam from the boilers, which is then reduced to 30 PSI for use by the heat exchangers and other equipment in the hospital. See attachments 2 and 3.

c. The heat exchanger system is comprised of three B&G SU 227-2 shell and tube heat exchangers along with strainers and their associated isolation and control valves. See attachments 1 and 2.

d. The condensate return system connected to the heat exchangers is comprised of several components that shall be replaced. These include, but are not limited to, gate valves, steam traps, check valves, strainers, pressure powered pumps, condensate tanks, control circuitry, and other assorted related components. See attachments 1, 2, 3, 8, and 11.

e. Mechanical Room 8 shall remain functional during the project. All work will be performed during normal business hours unless it is necessary to conduct the work during a steam outage. Steam outages shall be performed on weekends and coordinated with the COR at least two weeks in advance. The contractor will be given no more than 24 consecutive hours to conduct their work during each steam outage. Multiple steam outages may be necessary.

f. Temporary construction barriers will be required for the work areas under construction. These barriers will be removed at the end of the work on that area/equipment and the areas shall be cleaned daily.

g. Follow VA Design Alert (see attachment 5: DA-151) for fittings and components.

h. All new components shall be installed per the manufacturer’s instructions and procedures.

i. All existing connections that use flanges shall have flanges installed on the new components.

j. Provide new gaskets, washers, nuts, bolts, sealants as necessary to install the new components.

k. Steam traps, valves, heat exchangers, and pressure powered pumps must meet original design specifications (see attachments 6 and 10) and be equivalent to, or better than, existing equipment. COR must inspect and approve newly installed equipment/components for leaks before new insulation is installed on new items.

l. All newly installed components must function properly with the existing VA equipment.

m. All work will need to be done in phases. Contractor shall develop a phasing schedule for approval prior to starting any work. The hospital steam supply will need to be stopped multiple times to allow some of the components to be replaced during this project. See paragraph 7.a for steam outage requirements.

n. Any existing chain actuated valves will be replaced with new equivalent, or better, chain actuated valves.

o. It is important that work be sequenced to allow additional space heating capacity to be brought back online as soon as reasonably possible. Adequate steam and hot water capacity must be maintained to allow continuing hospital operations. Phasing shall be coordinated with the COR.

3. DEMOLITION:

a. Remove items that will be replaced during this project as indicated by the attached drawings and sections below. Items will include, but not be limited to, piping, heat exchangers, valves, tanks, steam traps, gauges, pumps, strainer screens, insulation. Space will be allotted to the contractor within the tunnel area for a dumpster.

b. The Contractor shall remove waste materials and debris daily from the work area. All waste material and debris shall be removed off the site at the end of the project by the contractor and shall be disposed of in accordance with applicable TCEQ and Federal regulations. All recyclable materials shall be recycled, and weight tickets provided to the COR (i.e. piping, valves, traps, etc.)

c. All major components removed (i.e. converters, valves, strainers, and traps) shall be shown to the COR for inspection and allow the VA to retain the components for spares. Any components that the VA does not want to keep will be disposed of off-site at the contractor’s expense.

4. PRESSURE REDUCTION STATION:

a. The steam pressure reduction station has three main functional branches and a bypass branch. Each of the three main branches has an isolation valve on each end, a Y strainer, a pressure gauge, and two pressure reduction valves (PRVs) in between the isolation valves.

b. See attachment 4 for an approximate representation of the existing pressure reduction station system. Note that the existing system might not exactly match this drawing. Contractor shall field verify. Many, but not all, of the items to be replaced are shown in yellow on attachment 4. See attachment 6 for pressure reduction station branch specifications. Attachment 6 shows the correct pressures and capacities that are required. Please note the existing gate bypass valve sizes appear to be 8”, 6”, 6”, 4”, 6”, 3”. Contractor shall field verify before ordering. Contractor shall not go by the bypass valve sizing listed on Attachment 6.

c. The following items shall be replaced with new:

i. Remove existing insulation and replace with new, equivalent or better, insulation after all the other new components have been installed and pressure tested.

ii. Remove six existing gate valves and replace with new, equivalent or better, valves made from cast steel or forged steel. Three valves on the incoming steam high pressure side have existing small bypass loops and valves installed. The new valves that replace these items shall have equivalent capabilities to the existing valves. See attachment 13.

iii. Remove six existing pressure reduction valves (PRVs) and replace with new, equivalent or better, valves made from cast steel or forged steel. Remove old and provide new pressure pilots compatible with the new PRVs. Calibrate and adjust PRVs and their pressure pilots to achieve the specified outputs (see attachment 6, table “Pressure Reduction Valves”).

iv. Remove five existing pressure gauges and replace with new, equivalent or better, gauges. Remove old supply tubing and replace with new, equivalent or better, tubing.

v. Remove five existing steam traps and replace with new, equivalent or better, steam traps made from cast steel or forged steel. For each steam trap, remove old and replace with new, equivalent or better, three small isolation valves (15 total) surrounding the steam trap and a y-strainer (five total).

vi. Remove three large Y strainer (next to the input high pressure steam side) screens and install new, equivalent or better, screens in each. Screens shall be stainless steel rated for high temperature and pressure steam (at least 500 degrees F and at least 150 PSI pressure).

5. HEAT EXCHANGERS:

a. The heat exchanger system consists of three large shell and tube heat exchangers and other associated components. See attachment 2 for an approximate representation of the existing heat exchanger system. Note that the existing system might not exactly match this drawing. Contractor shall field verify. Many, but not all, of the items to be replaced are shown in yellow on attachment 2. See attachment 10 for heat exchanger and control valves specifications.

b. The following items shall be replaced with new:

i. Remove existing insulation and replace with new, equivalent or better, insulation after all the other new components have been installed and pressure/function tested.

ii. Remove three existing B&G SU 227-2 heat exchangers and replace with new, equivalent or better, heat exchangers made from cast steel or forged steel.

iii. In order to increase heating capacity as soon as possible, the contractor shall purchase a new tube bundle (in addition to the three complete shell and tube heat exchangers mention in line 2 directly above) and install in Heat exchanger #3 as early in the project as possible, but no later than 80 calendar days after the notice to proceed is issued. This tube bundle will later be removed and returned to the VA (to be used as a spare) when the full shell and tube heat exchanger arrives and is installed later in the project. Remove one existing tube bundle and replace with a new, equivalent or better, bundle. The new bundle must meet or exceed the OEM specifications and be compatible with the existing shell. See attachment 12 for tube bundle specifications. This shall be done as early in the project as possible to bring a non-functional heat exchanger back online. Coordinate with the COR on which tube bundle shall be replaced.

iv. Remove three valves (on each heat exchanger, nine total) on the supply and return water connects to the heat exchangers and replace with new, equivalent or better, valves.

v. Remove three gate valves (on each heat exchanger, nine total) on the steam input side of the heat exchanger and replace with new, equivalent or better, valves made from cast steel or forged steel.

vi. Remove and replace the Y strainer screens with new, equivalent or better, screens. New screens shall be stainless steel rated for high temperature steam (at least 500 degrees F and at least 150 PSI pressure).

vii. Remove three steam control valves (one for each heat exchanger) that modulate steam going into the heat exchangers and install new, equivalent or better, steam control valves, made from cast steel or forged steel. Adjust new control valves as necessary for existing conditions. Coordinate with the COR for operational adjustments of the new steam control valves. New steam control valve will have same capabilities, or better than, the existing steam control valve for heat exchanger #3. See attachment 2 items 15, 16, and 17 and items V-1 on attachment 7.

viii. Remove two globe valves (items #36 on attachments 1 and 2) and replace with new, equivalent or better, valves made from cast steel or forged steel.

6. CONDENSATE RETURN SYSTEM AND PRESSURE POWERED PUMPS:

a. The condensate output from the heat exchangers flows to a condensate reservoir tank and then to a pressure powered pump (PPP) condensate storage tank. High pressure steam (125 PSI) is then used to pump the condensate to the main condensate return unit (CRU8A), see Attachments 1, 2, 3, 8, 10, and 11. Note that the existing system might not exactly match these drawings. Contractor shall field verify.

b. All functional components, and piping, of the PPP system and condensate return system from the condensate reservoir tank to the PPP tank inlet through the “Main condensate isolation valve” shall be replaced with new items that are equivalent to, or better than existing components (see Attachment 11). These components will include, but not be limited to:

i. Remove existing insulation and replace with new, equivalent or better, insulation after all the other new components have been installed and pressure/function tested.

ii. Remove the existing condensate reservoir tank (three total) and replace with a new, equivalent or better, tank. Provide flanges and connection points to match the existing. Install new shutoff valves exiting the upper rear of the reservoir tank. New tank shall be able to withstand a minimum 150 PSI pressure and a minimum of 500-degree Fahrenheit temperature.

iii. Remove and replace two drain valves (6 total for three systems) with new, equivalent or better, valves made from cast steel or forged steel.

iv. Remove and replace two check valves (6 total for three systems) with new, equivalent or better, valves made from cast steel or forged steel.

v. Remove and replace four isolation valves (12 total for three systems) with new, equivalent or better, valves made from cast steel or forged steel.

vi. Remove and replace two air vent valves (6 total for three systems) with new, equivalent or better, valves made from cast steel or forged steel.

vii. Remove and replace the main pressure powered tank/pump units (three total) with new, equivalent or better, PPP condensate return system. New system shall have minimum capabilities of 50 GPM of condensate, able to withstand min 150 PSI pressure and min of 500 degree Fahrenheit temperature.

viii. Remove and replace the steam control/supply system (three total) for the PPP tank/pump units with new, equivalent or better, components. Testing and calibration of the new control system to confirm proper operation is required and must be performed by the contractor at their expense. The new control system must maintain at least the same functionality and capabilities as the existing.

ix. All piping sections that connect these components shall be replaced with new carbon steel Schedule 80 pipe. Install flange connections to match the existing locations.

x. Remove and replace two steam traps (6 total for three systems) with new, equivalent or better, steam traps made from cast steel or forged steel. For the smaller steam trap (three total, ST12 for Heat exchanger #1 is an example, see attachment 6 for specifications) remove old and replace with new, equivalent or better, three small isolation valves (nine total) surrounding the steam trap and a y-strainer (three total).

7. PHASING:

a. Parts of this project must be performed during steam outages. The hospital steam supply will need to be stopped multiple times to allow some components to be replaced during this project. Steam outages will be scheduled on the weekends at least two weeks ahead of time. The steam outages will last no longer than twenty-four (24) hours each (total time allowed for all work and testing by the contractor equals 24 consecutive hours for each outage). Additional time will be needed before and after the contractor’s allotted 24 hours for VA personnel to shut down steam and ramp steam pressure back up.

b. The installation of isolation valves shall be prioritized during steam outages to allow some components (located between two isolation valves) to be installed after steam flow has returned. This may allow fewer outages of shorter duration.

8. STATEMENT OF WORK ATTACHMENTS:

a. Attachments are provided for reference and specifications. The actual field conditions may not be exactly as represented on the drawings. Contractors shall rely on field inspection for verification of all actual existing site conditions.

Attachment 1: System overview Attachment 2: Heat exchanger system detail Attachment 3: Pressure reduction station Attachment 4: Pressure reduction station detail Attachment 5: VA DA-151 Attachment 6: Equipment schedules Attachment 7: Heating water controls Attachment 8: Steam system one line Attachment 9: Symbols Attachment 10: Equipment schedules Attachment 11: Condensate return system Attachment 12: OEM tube bundle Attachment 13: Valve with bypass loop

9. SUBMITTALS and DELIVERABLES:

a. Contractor shall submit to the MEDVAMC the following before proceeding with the work:

i. Shop Drawings: Provide complete shop drawings for all items being installed.

ii. Manufacturers’ spec sheets: Spec sheets for all new equipment/components to be installed shall be sent to the VA for approval before purchase by the contractor.

iii. Quality Control Plan. Contractor shall establish a quality control plan for all work, including that of his subcontractors, to assure compliance with the contract provisions. Contractor shall submit a copy of his quality control plan concurrently with the quote and schematic submission. Quality control measures shall include, but not be limited to:

· Obtaining payment and performance bonds, permits, licenses and insurance.

· Performing all required inspections and tests.

· Listing all subcontractors and services they will perform.

· Submittal approval.

· Inspection schedule.

· Compliance with applicable Federal, state and local codes and regulations related to executing the contract.

· Correction of unsatisfactory work.

b. The VA will review shop drawings, detail drawings, schedules, descriptive literature and samples, testing labor- laboratory reports, field test data and review the color, texture and suitability of materials for conformity with the contract documents. All submittals shall be in electronic format, via email and under 15MB, and include a Submittal Cover sheet for return as annotated.

c. Deliverables:

i. Hot work permits, as necessary.

ii. Waste Management Plan

iii. Manufacturer’s warranty paperwork

iv. Manufacturer’s operations and maintenance manuals.

v. Project Record Drawings: The Contractor shall maintain a set of Record Drawings. The Contractor shall maintain a set of construction documents (field as-built drawings) to record actual construction changes during the construction process. The project record drawings must be available for review by the COR at all times.

10. PROJECT SPECIFICATIONS AND REQUIRED CODES:

a. The VA will be responsible for obtaining necessary local agency approvals as required.

b. All work performed under this contract shall be in accordance with the VA Master Specifications (http://www.cfm.va.gov/til/spec.asp). Use sections that apply to the scope of work.

Division 01 01 74 19 Division 02 02 41 00 Division 22 22 11 00 22 35 00 Division 23 23 05 00 23 07 11 23 09 00 23 21 00 23 22 00

c. All work shall comply with all local, state, and federal rules and regulations. In the event of a code discrepancy the stricter of the ordinances shall prevail.

11. WORK LOCATION AND HOURS OF OPERATION:

a. The work site location is at the Michael E. DeBakey VA Medical Center in Houston, TX. The contract work is located in Mechanical Room 8 in the basement of Building 100.

b. VA’s Normal Working Hours are 7:00 am to 4:30 p.m., Monday through Friday. The facility operates 24/7 for patient care. Contractor shall coordinate work with the COR in order to not disrupt the facility’s operations which may include work earlier or later in the day and on weekends or federal holidays with at no additional cost to the VA. Noise disturbances and utility shutdowns/tie-ins shall be coordinated with the COR and not interfere with VA daily operations.

c. The following legal holidays are observed by this Government Agency:

and any day declared by the federal government as holiday.

12. STORAGE OF EQUIPMENT & MATERIALS:

a. The contractor shall arrange with the COR for allocation of required workspace and for the storage of equipment and material to be used for this project. Storage space is very limited. There are no exclusive areas on campus that can be given to the contractor for their storage needs. A small amount of storage space may be available next to the equipment while under construction/repair.

b. Additionally, no space will be made available for the placement of a contractor trailer for this project. The Contractor should schedule delivery of materials to limit the amount of storage space and time.

13. SITE UTILITIES:

a. Contractor shall note this scope of work does not detail all existing structures, utilities, or components that may potentially interfere with the contract work required or require modifications. All proposed utility relocations, reallocations, and shutdowns shall be approved in advance by the COR prior to commencing such work. Contractor shall field verify all existing utility installations and take appropriate action prior to working around any potential utility installation.

b. In the event a shutdown, restriction, or interruption of any utility services is required, a written request must be submitted at least 2 weeks in advance and approved by the COR. All utility shutdowns must be reviewed and approved by the COR.

14. MATERIAL & WORKMANSHIP QUALITY:

a. All materials and workmanship shall comply with all codes, standards, and recommendations of all Authorities Having Jurisdiction (AHJ). All work shall be done in a first-class manner according to the best trade practices and to the satisfaction of the COR.

b. Quality Assurance. The Government will inspect and evaluate the contractor’s performance to ensure services are received IAW requirements set forth in this contract. The COR will evaluate the contractor’s performance through 100% surveillance inspections, investigating customer complaints and conferring whether or not performance meets the standards. Results of the surveillance inspections become the official record of the contractor’s performance. When a performance threshold has not been met the COR will initiate and provide the CO a Contract Discrepancy Report (CDR), DD Form 2772, for issuance to the contractor. The contractor shall respond to the CDR IAW instructions provided and return it to the CO.

c. The Contractor shall provide VA personnel with the necessary training to properly operate all provided equipment and systems.

15. SAFETY & SECURITY:

a. Contractor shall comply with the following and keep a copy of the following on site at all times:

i. OSHA

ii. Interim Life Safety Measure Assessment (completed on site by phase)

iii. Infection Control Risk Assessment

iv. Hot work Permits required, as needed

v. Confined Space Permits required, as needed

b. Contract workers under this project may require a VA issued identification card before the start of construction work at the Houston VAMC. There is no charge for the badges; however, multiple trips to MEDVAMC facility maybe required.

c. Contract employees, including all subcontractor employees, must be TB tested and receive a flu shot (each year under the contract performance) if they will work within the VA Hospital Building 100. A letter from the prime contractor shall be submitted to the CO prior to work commencing that all staff members are TB negative, and the flu shot was received.

d. All contract personnel are subject to inspection of personal effects when entering or leaving the project site.

e. Parking is rigidly controlled throughout the Medical Center. Contractor parking is only allowed in authorized areas. Contractor shall abide by all police requirements. Parking in designated patient parking areas is strictly prohibited. Parking for unloading equipment necessary to perform the work will be authorized in advance by the COR prior to starting the project.

f. Contractor shall abide by MEDVAMC’s policy for measures to prevent the spread of COVID. Policies may change during contract performance. COR and/or CO will provide updates as they are issued by the Facility Director. Contractor shall follow the CDC guidelines for COVID. A&A requirements do not apply, and a Security Accreditation Package is not required.

g. Contractor is not required to prepare a formal interim life safety measures plan for this project. At a minimum, contractor shall comply with the following requirements of an interim life safety measures and fire protection plan:

i. Maintain the construction area to minimize the potential for fire or safety hazards resulting from storage of construction material, construction waste and debris during construction operations.

16. PROJECT MEETINGS:

a. At a minimum, every two weeks the contractor shall hold a progress meeting to review progress to date and to resolve all questions for the upcoming week. The progress meeting shall include at a minimum, the Project Manager and the Superintendent representing the Contractor, the COR and the CO representing the Government. Technical supervisor (foreman), sub-contractors, suppliers, etc. shall attend when requested by the Contracting Officer. The meeting shall be same day, time, and place each week.

b. Meeting Minutes - The contractor shall take minutes of all meetings held relative to this project. The format must be acceptable to the Contracting Officer (CO). Minutes must include the meeting date and time; agenda; meeting location; list of participants with their affiliations, and telephone numbers; be fully descriptive of issues, problems and decisions made; and action items with names of responsible parties and deadlines. In addition, the minutes must include, as attachments, all exhibits and references distributed as handout materials, unless the materials are part of a formal submission. The contractor shall provide, via e-mail, complete copies of all minutes to all attendees within 72 hours of the meeting. All challenges to the minutes will be reflected in a revised version prepared by the contractor and CO along with the contractor and COR shall sign/initial the minutes. In the event of any disputes or challenges that can’t be resolved, the Contracting Officer shall render a final decision. Copies of updated minutes shall be distributed to all attendees within 48 hours after change notice.