HC102818R0064-0001.docx

HC102818R0064

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 1449 - CONTINUATION SHEET

SOLICITATION/CONTRACT FORM

The required response date/time has changed from 23-Jun-2018 02:00 PM to 02-Jul-2018 01:00 PM.

The following have been added by full text:

QUESTIONS AND RESPONSES

Government Response to Questions Solicitation Number: HC102818R0064 Subject: OKC Raised Floor and High-Density Cooling & Power Upgrade

1. Reference RFP page 5 of 100, Section (2) Past Performance Factor “…documented experience that demonstrates successful completion of projects in raised floor environments, installation of PDUs, and installation of CRAHs; all in a data center environment.” Please confirm that the Offeror may demonstrate experience in the three areas (identified with underlining above) across all projects submitted and does not have to include all three areas in each project.

Response: Correct, experience may be on different projects. Demonstrated experience in the three areas of raised floor, power, and cooling is not expected to be on each single project. The offeror may demonstrate experience in the three areas across all projects submitted.

2. Please confirm the submission of CPARS or PPQs is not required with the response of this proposal, as the Government will be using PPIRS.

Response: The Government has not requested the submission of CPARS in response to the proposal. IAW HC102818R0064, the Government reserves the right to obtain information relative to present and past performance on its own, in addition to that provided by the offeror. Past performance information may be obtained through the Past Performance Information Retrieval System, through interviews with program managers on past efforts, or any other sources known to the Government.

3. Please confirm that the tabs, covers, table of contents, or any other sheets provided solely for the purpose of organization will be excluded from the page limits.

Response: Reference HC102818R0064, paragraph c, pages 3-4 which outlines the items excluded from the page limits and advised the administrative requirements with regard to font and margins. IAW HC102818R0064, paragraph c, pages 3-4, the following items will not be considered when calculating page limits: cover page, table of contents, glossary, executive summary, generic resumes, and OCCI mitigation plans.

4. RFI answer #1 confirmed the due date as June 23rd, which is a Saturday. Many offerors and most Government offices do not operate on Saturday or Sunday. Will the Government consider extending the proposal due date to the following Monday, June 25, 2018? If not, please confirm that the proposal recipient, Sharon E. Brace, will be available to acknowledge and confirm receipt of emailed proposals on Saturday June 23rd.

Response: The Government will adjust the date for proposals due. The due date for proposals will be July 2nd, 2018 at 1 pm CST; the RFP has been amended to incorporate the revised date.

5. Attachment 2_Pricing Sheet includes a set amount for CLIN 0003, “Travel”. Please clarify whether this travel amount is to be used for CLIN’s 0001 & 0002 or is CLIN 0003 only associated with work that may be performed under CLIN 0004?

Response: There is no CLIN 0003, for travel. CLIN 3 covers contingency costs and does not include travel, which was erroneously referenced in HC102818R0064, pages 6-7, price factor, and on the pricing spreadsheet. The RFP and pricing sheet have been updated to remove all references to travel. The offeror is to propose a firm fixed price in response to the proposal for CLINs 0001 and 0002, and to use the plug number provided for CLIN 0003 (reference HC102818R0064, pages 6-7.

6. While it is the intent for no power or IT communication loss during construction, please confirm that DISA will be able to implement safe-guarding procedures to ensure that any accidental disconnection will not have any monetary implications that would be passed down to the Contractor.

Response: DISA will require scheduled work with advanced notice to implement safe guards through Authorized Scheduled Interruptions (ASIs). ASIs require a minimum of 28 days’ notice and prior Government approval before work that may impact critical data center operations begins. This will require close coordination between all parties working on the raised floor environment.

7. Please confirm that all perimeter walls of Room 147 and Room 145 are one-hour fire-rated walls and that any penetrations will need to be done in a manner to maintain the one-hour fire-rating.

Response: Correct, all walls are fire rated and all penetrations shall meet one-hour fire rating.

8. Could the most current equipment floor layout of Room 147 be provided? Or the most current “future” layout?

Response: IAW HC102818R0064, page 9, contractors interested in proposing this effort should request copies of the appendixes from Mr. Rodney Placzek at rodney.c.placzek.civ@mail.mil. The existing and future IT equipment floor layout, and other PWS appendixes, will be provided upon request.

9. Will any special and/or additional insurance policies/amounts be required when handling the server racks? If so, please advise.

Response: Normally the contractor is responsible for any damage during a project, including IT equipment damage or unscheduled outage. The operational racks in OKC data center have been valued at over $1M per month (both replacement and lost production to DISA) if they went down. It is important to understand the risks and Contractor’s may opt to carry risk insurance. The Government is not requiring additional insurance, but the Contractor will be responsible for damage/outage caused by the work and the additional insurance is the Contractor’s option. In addition, please note that this RFP is conducted under FAR Parts 12 and 15. This is not a construction requirement, therefore FAR Parts 14 and 36 are not applicable.

10. In the work description document, paragraph 6.14.2.3 states that no IT equipment is to be shown on the drawings. Please clarify the meaning of this paragraph.

Response: Facility as-built drawings shall only show installed facility infrastructure equipment to include Cold Aisle Containment enclosures, In-row Coolers, Water Distribution Units, Static Transfer Switch/Power Distribution Units (STS/PDUs), Computer Room Air Handlers (CRAHs), Underfloor Pressure Sensors, and all associated power and chiller water pipe distribution runs. No IT racks shall be illustrated on the facility as-built drawings.

11. General Note 4 on sheet M1 requires structural calculations for supports required by mechanical. Please clarify Verify structural engineer includes in their scope.

Response: Pre-manufactured structural supports for CRAHS should have calculations included by the manufacture. If any supports are fabricated on site, then structural calculations are required.

12. Sheet M-101, Keynote 1 – Provide model number of approved sensors for pricing.

Response: The pressure sensors are Liebert sensors to be compatible with the existing Liebert CRAHs Model CW106DC1A2B781 with Liebert iCOM® controls. VERTIV/Liebert Model: XDUCR PRES MAX -0.1-5"WC. They connect directly to the unit with a hose that extends about 10 feet.

13. Sheet M-102, New Equipment Plan Area C - Is access for maintenance required on the sides of each CRAH? During walk-thru, one side panel was removed showing a control valve which will need maintenance. The other side was not checked. New plan shows WDU and PDU/STS in close proximity which may restrict access. What access is required around WDU and PDU/STS equipment?

Response: Equipment access is required from the front and/or back for maintenance. Side access is not required for maintenance on these new units.

14. Need copies of existing As-Built conditions below raised floor to determine conflicts with new equipment. During walk-thru one panel was removed indicating a cable tray located directly below where a new PDU/STS is to be installed.

Response: : IAW HC102818R0064, page 9, contractors interested in proposing this effort should request copies of the appendixes from Mr. Rodney Placzek at rodney.c.placzek.civ@mail.mil. The current IT equipment floor layout, along with other PWS Appendices, will be provided upon request.

15. Sheet M-102, New Equipment Plan Area C – The new Cold Aisle Containment Enclosures do not match the existing computer racks as pointed out in General Notes. The actual equipment appears to be much closer and may lack sufficient clearance for IRC’s. Will the racks be relocated prior to start of construction or will the plan be revised?

Response: Racks are placed as shown on drawings. The drawings are provided as “Concept Drawings”. Racks may be adjusted as needed during the installation of the Cold Aisle Containment enclosures and In-Row Coolers to meet the intended operational requirements of the enclosures.

16. Sheet M-103 shows piping layout parallel to walls and with fittings. However, Detail on Sheet M501 calls for joint-less PEX-AL-PEX. Joint-less piping is likely to be more haphazard and not parallel to walls. Will the contractor be allowed flexibility on piping location and routing or will a rigid plan need to be followed?

Response: Yes, contractor will be allowed flexibility on piping location and routing to avoid obstacles. Drawings are provided as “Design Concept Drawings”.

17. M-701 schedule references APC models for IRCs and WDUs. Would it be permissible to furnish Liebert models that are equal?

Response: Yes, salient features are provided in the PWS, section 6.4.1 and 6.5.1. Any model referenced is provided as an example and equal or equivalent units will be reviewed and evaluated during the submittal process.

18. It was mentioned at the site visit that DISA has installed cold aisle containment enclosures at other sites. Could DISA provide make/model of enclosures that were installed?

Response: Subzero ‘Polarcap’ enclosures were installed at Data Centers St Louis and Ogden. However, other makes and models will meet the salient features for enclosures and are acceptable [to submit for review] if the enclosure ceiling is retractable or otherwise breaks away when clean agent and fire suppression are activated.

19. Please confirm that schedules on sheet E-002 are for existing equipment only, and no new equipment is listed on sheet E-002.

Response: Sheet E-002 of the Design Concept Drawings is provided for the end state electrical schedule of existing and new equipment. The Government is coordinating with the site to correct the E-002 electrical schedule. The PWS, section 6.7 provides the list of new STS/PDU pairs required to be installed.

20. On sheet E-101, PDU-A-3 is shown to be new. On sheet E-002, item 143 appears to include PDU-A-3 as existing. Please clarify.

Response: Sheet E-101 is correctly showing STS/PDU-A-3 as new. The PWS, section 6.7, provides the list of new STS/PDU pairs required to be installed.

21. On sheet E-101, PDU-B-3 is shown to be new. On sheet E-002, item 147 appears to include PDU-B-3 as existing. Please clarify.

Response: Sheet E-101 is correctly showing STS/PDU-B-3 as new. The PWS, section 6.7, provides the list of new STS/PDU pairs required to be installed.

22. On sheet E-102, the names of panels “UDP-A10-1” and “UDP_1-A-10” appear to be swapped. Please confirm.

Response: Panel names are correct. UDP-A10-1 is a new sub-panel to the existing UDP_1A-10. See Note 4, “NEW 800A PANEL, INSTALL PER ONE LINE DIAGRAM, SEE SHEET E-614.”

23. On sheet E-102, the names of panels “UDP-B10-1” and “UDP_1-B-10” appear to be swapped. Please confirm.

Response: Panel names are correct. UDP-B10-1 is a new sub-panel to the existing UDP_1B-10. See Note 4, “NEW 800A PANEL, INSTALL PER ONE LINE DIAGRAM, SEE SHEET E-614.”

24. On sheet EG-102, notes 3 and 6 appear to describe two ways of accomplishing the SRG. Please confirm if the intent is to provide both methods, or if the contractor has the option of providing one method or the other.

Response: Notes 3 and 6 are in fact in conflict. The concept design drawings intent is to match the existing 4’x4’ SRG grounding with 2’x2’ grid per Note 3.

25. On sheet EG-102, note 5 states to bond new racks to SRG. Please clarify the meaning of “new racks” in the context of this note.

Response: The design intent is to bond any IT racks that are not currently bonded to the SRG. Based on site survey, all existing IT racks are currently bonded to the SRG. If any new IT racks are placed during the performance of this contract, bonding will be required to the SRG.

26. On sheet EG-102, the word “bond” is used in several notes. Please specify the required bonding methods for each application such as SRG to #2/0 copper conductor, #6 copper conductor to SRG, braided copper to floor pedestal, and so on.

Response: Per Notes 3, Install new continuous #6 bare copper conductors on 2-foot center in each direction. Support from each new support post using a UL listed SRG floor pedestal clamp at each point of intersection. See detail picture on sheet E-501. Per Note 4, Grounds from racks, if needed, will have #6 conductors and use ground clamps to floor pedestal as shown on sheet E-501.

27. On sheet EG-102, note 6 states to use 1” wide flat metal braids with copper subcenters. I am not familiar with this product. Please provide manufacturer and catalog data information for the desired material.

Response: Please disregard Note 6. Note 6 on Sheet EG-102 of the Design Concept Plans is deleted.

28. On sheet EG-102, note 6 requires a great deal of bonding but does not seem to require the metal braids to be bonded where they cross each other. Is the intent for the SRG braids to be bonded everywhere they cross?

Response: Yes, the intent is for the SRG braids to be bonded everywhere they cross.

29. On sheet EG-102, neither SRG construction method described in notes 2 or 6 match the type of SRG to be installed in Room 180. Please confirm that the type of SRG being installed in room 180 is not the type of SRG to be provided on this project, but also please note that installation of that type of SRG will be extremely difficult in an occupied and active data center.

Response: The Government confirms that the SRG to be upgraded in the main computer room, Room 147, is to match the existing SRG type filling in the current 4’x4’ grid to a 2’x2’ grid with the SRG braids bonded everywhere they cross. The Government understands that this may be different configuration than what is currently being installed for Room 180.

30. Please confirm if the SRG extends into the Room 144/145 area or to the storage room at the northwest corner of the building.

Response: Yes, the SRG extends into the Room 145B, PKI Equipment Room, off the northwest corner of the main computer room. No SRG is required in the storage room or the vault. Access to this room is limited to non-duty time or weekends.

31. On sheets E-608 and E-610 there are no sizes given for the STS/PDU feeders. Should the same sizes shown on sheets E-612 through E-614 be assumed?

Response: Yes, the same feeder sizes shown on sheets E-612 through E-614 are to be used.

32. On sheets E-612 through E-614, the STS/PDU feeders are shown to be 350 MCM connected to 350A circuit breakers. Please confirm that this is the conductor size to be provided.

Response: The Government confirms that 350 MCM is conductor size to be provided unless a different size can be justified in the proposal for an economical savings.

33. On sheet E-616, the interrupting capacities are not given for new panelboards EPD-A4-1 and EDP-B4-1. Please provide the interrupting capacities to be used for bidding purposes.

Response: Interrupting capacities is 65KAIC as also noted on sheet E-606.

34. On sheets E-612 through E-614, many distribution panels have the acronym “MLO” in their description but the graphics indicate main circuit breakers. Please confirm that this is a simple typo that should have read “MCB” (Main Circuit Breaker) in most cases.

Response: MLO is correct and refers to Main Lugs Only. Main Lugs are generally used for sub-panels fed from the main breaker panels.

35. On sheet E-614, UDP-A-10 and UPD-B-10 are shown to have 1200AF/1200AT main circuit breakers and 800A bus. Please confirm that this is a simple typo and both panelboards have 1200A bus.

Response: The Government confirms this is a typo and both panelboards have 1200A bus.

36. Per the performance work statement 6.10.7.- Contractor shall provide the four new CRAH units with smoke detection, installed and connected to the fire system panel as a part of their UL listed assembly in Room 180. Please confirm this will be picked up as a signal monitoring device by the fire alarm panel, and that the clean agent panel will shut down the CRAH units in the case of a clean agent release, similar to CRAH operations in Room 147.

Response: Yes, the Government confirms the intent for the new CRAH units have smoke detection monitoring device to send a signal to the fire alarm panel, and that the clean agent panel will shut down the CRAH units in the case of a clean agent release, similar to CRAH operations in Room 147.

37. Per PWS 6.2.1.1, Contractor is to replace raised-access floor panels in Room 145 and Room 147 with ConCore 2500 psf strength capacity to fit on the existing access floor structure. However, in order to switch from the existing WoodCore panels to ConCore panels, the stringers and heads will also need to be switched out. The bottom of the WoodCore panels sit on top of the stringer, whereas the ConCore panels have a top edge that sits on the top of the stringer. In addition, the 2500lb ConCore panel requires the heads be fillet welded and the current heads are tack welded. Please see attached data sheets for each. Please confirm Contractor to include new stringers and heads in their proposal.

Response: Yes, the Government confirms after field verification, per PWS section 6.2.2, that new stringers will be required along with new pedestal heads to meet the 2500 lb. Concrete Core (ConCore) panel standards.

38. It appears the existing pedestal bases are glued down to the existing slab and painted over to match the existing floor. There is a possibility with re-using the bases and the floor ''growing'' as the new material is installed. If this occurs, there will be a point where the existing bases would be required to be removed and re-used (if possible) or new bases being supplied and installed in the new location. Is it permissible for bases to be re-used or should Contractor include costs for new bases?

Response: Pedestals bases may be reused. If bases cannot be pulled from the floor for reuse, new bases shall be included in cost for replacement. The offeror should not build the cost for replacement into the FFP rates. If necessary, CLIN 0003- Contingency, will be used for replacement bases.

39. In order to lift the server racks to replace the access floor, there will need to sufficient slack in the cabling to allow the rack to be lifted approx. 2''-3''. What party is responsible for confirming there is enough slack?

Response: The contractor is responsible for determining the cable slack available prior to lifting the racks. Contractor may unfasten and lift the IT cable tray as needed if cabling does not allow required slack.

40. During the replacement work, while a server rack is being lifted and/or in the air, will DISA provide a representative/tech, as a precaution, that has the ability and authority to correct any items that may occur?

Response: Yes, the Government will have technicians available with ability to correct IT issues for the scheduled lifting of racks.

41. During the site visit, it appeared the stingers and pedestal heads were not compatible with the required 2500-pound Concrete Core panels.

Response: The Government confirms that during the site verification, Stringer and pedestal heads required replacement.

42. During the site visit, the telephone room on the west end of the main computer room was shown to have a raised floor and the secure computer room 145B in the northwest corner had a storage room, vault and foyer/vestibule that have raised floor.

Response: The Government confirms that all raised floor areas to include the telephone Room (15’x34’) and the secure computer room 145B storage room (8’x10’), vault (14’x10’) and foyer/vestibule (9’x10’) shall have raised floor upgrades. The telephone room has self-supported gaseous fire suppression bottles that occupy approximately 6’x16’ of space.

43. Are there any Liquidated Damages on this contract?

Response: No, there are no liquidated damages on this equipment installation contract.

44. What is the requirement for Announced Schedule Interruptions (ASIs) discussed at the site visit.

Response: ASI’s must be requested a minimum of 28 days in advance. Per PWS Sections 6.1.1 and 6.2.1.7, a phasing plan is required to allow for prior planning and scheduling of ASIs and closely coordinated with the Government representatives on site.

45. During the site visit, Period of No Disruption (POND) was discussed. When will those occur?

Response: A Period of No Disruption (POND) may occur during times of critical military operations and at the end of the Fiscal Year (FY) for some IT operations. The Government will identify areas on the raised floor environment that may be effected by a POND at the end of the FY. Rack areas effected must be scheduled around.

46. Cable trays under the floor appear in the way of accessing the UDP power panels at the west end of the main computer room with very tight working conditions.

Response: Cable Trays may be temporarily moved and reinstalled, as long as IT cabling is not disconnected, to allow for installation of power cables to the UDPs.

47. Who will do the Labeling of new equipment?

Response: The contractor shall provide and install the equipment labels follow the Labeling requirements in accordance with the PWS, with Government review and approval.

48. It appears there is an error in the mechanical schedule that we felt we needed to bring to your attention. We reached out to APC for pricing of the in-row coolers and water distribution units as they are the manufacturer listed on the mechanical schedule on Sheet M-701. Kevin Laverty with APC stated that the scheduled in-row cooling units (acrc600) are not compatible with the scheduled cooling distribution units (ACFD12-B). Also, the pipe size for the AC units is shown as 1”, and the acrc600 uses 1.5”. He said if we change the in-row cooling units to ½ racks, ARCR300s, we could use both the CDU scheduled and the 1” pipe size. We would have to use twice as many IRC’s, but they are 1 ft wide instead of 2 feet wide so they take up the same floorspace. We would also need to include 4 of the CDUs instead of 2.

Response: The PWS, sections 6.4.1 and 6.5.1, state that Liebert chilled water distribution units (WDU) and In-Row Coolers (IRC) are acceptable. The PWS provides the required salient features that must be met. The required concept as stated in the PWS and on the Design Concept Drawings shall be maintained with a total of 18 IRCs (40 kW each), 3 IRC per containment pod, and 9 IRCs connected to each of the two water distribution units with the capability to connect up to 12 IRCs. Liebert model WD512BPO Chilled Water Distribution Units are being successfully used at the DISA Computer Centers in Ogden and St Louis.

The OKC site has only identified available space for two (2 each) Water Distribution Units (WDU), or "CDUs" as stated in the question, to support the designated high-density rack area, therefore, additional WDU placement would not be acceptable. The PEX pipe size can be either 1" or 1-1/2", as long as the system meets the chilled water flow requirement to provide 45 to 55 degree chilled water to the IRCs in accordance with Section 6.5.1.1.

The following have been modified:

PERFORMANCE WORK STATEMENT

Performance Work Statement (PWS) DISA Computing Center Oklahoma City Raised Floor and High Density Cooling & Power Upgrade As of April 27, 2018

1. Contracting Officer’s Representative (COR).

a. Primary COR.

Organization:

Department of Defense Activity Address Code (DODAAC):

Address:

Phone Number:

Fax Number:

E-Mail Address:

b. Alternate COR.

Organization:

DODAAC:

Address:

Phone Number:

Fax Number:

E-Mail Address:

2. Contract or Task Order Title. DISA Computing Center Oklahoma City Raised Floor and High Density Cooling & Power Upgrade

3. Background.

DISA Computing Centers provide routine and mission-critical computer processing resources and support to numerous Government agencies, 24 hours per day and seven (7) days a week. DISA’s operational goal is to provide high availability and redundancy to all supported programs and workloads at a Tier III redundant datacenter. The Oklahoma City computing center needs repairs and upgrades to the raised floor and high density cooling and power solutions for new information technology (IT) missions. The existing raised floor panels are wood core and must be replaced with concrete core panels for fire protection and higher floor load capacity, to meet the DOD standards.

DISA computing centers are laid out with a traditional hot aisle/cold aisle equipment rack configuration. The rack aisles are not enclosed with doors or a ceiling. The aisles are open and the rooms are typically kept cool. This is effective for racks that generate under five (5) kilowatts of heat load. Racks that generate higher kilowatts of heat require exploration of different cooling alternatives. The best way to do this is enclosing the racks in a cold aisle configuration. The cold aisle containment enclosures with IRCs provide a higher concentration for cooling the high density IT equipment racks. Additionally, another new IT mission requires secure space to be powered and cooled in a standard computing room configuration with static transfer switch (STS)/PDU pairs and CRAHs.

4. Objectives.

Upgrade the raised-access floor by replacing all access floor panels with concrete core panels; and upgrade or modify, as needed, the access flooring structure to support a floor load of 2500 pounds per square foot (psf). Clean the structural floor during the access floor replacement and upgrade the signal reference grid grounding system. Provide and install six (6 each) cold aisle containment enclosures for DISA computer equipment racks in Computer Room 147 in the southwest corner as referenced in the Design Concept Drawings at Appendix A. The racks will be arranged in linear configurations with six feet separating two rack rows. The contractor shall fully enclose six cold aisles of the proposed linear rack configurations with containment systems, complete with doors and retractable ceiling. The contractor shall provide, install, and connect eighteen new 40-kilowatt (kW) IRCs, three in each enclosure, with two (2 each) cold water manifold distribution units that will support the IRCs. Underfloor differential pressure sensors and controls shall also be installed and integrate on specified existing CRAHs. The contractor shall also provide, install, and connect a total of 16 200kVA static transfer switch/power distribution unit STS/PDU sets to support the IT equipment. Four STS/PDU sets shall support the new enclosures. Eight STS/PDU sets shall be provided and installed to support IT workload throughout Computer Room 147 and four STS/PDU sets shall support IT workload in Computer Room 180. Additionally, four 30-Ton CRAH units shall be purchased, installed, and connected in Room 180. Building automation system (BAS) controls shall be connected and integrated on all new equipment items, as specified. This project will also require red line installation shop drawings, and methods of procedures (MOPs) that have detailed sequence of events for tie-in circuits from the power source panels to the STS/ PDU pairs. Work includes all installation of equipment, electrical supplies, connections, start-up and testing commissioning, quality control, and parts warranty.

5. Scope.

5.1. Task 1: Develop detailed project schedule, investigate existing conditions, prepare and submit shop drawings for approval by the Government. Prepare and submit product data and a commissioning plan for start-up and testing for all electrical and mechanical equipment.

5.2. Task 2: Raised floor upgrade to replace all access floor panels with new concrete core panels and upgrade or modify, as needed, the access flooring structure. Clean the structural concrete floor during replacement the access flooring system. Signal Reference Grid (SRG) shall be detached, as needed, from the access floor system structure to allow for floor upgrade. Re-attach SRG to the new access flooring system and expand/extend to full 2’x2’ grid and bond with new racks to conform to industry standard.

5.3. Task 3: Purchase and install six (6 each) cold aisle containment enclosures between the planned linear rack configurations with air tight double sliding doors at both ends of the enclosure, retractable ceiling, and removable side panels for IT equipment racks.

5.4. Task 4: Purchase, install, and test two (2 each) chilled water distribution units (WDU).

5.5. Task 5: Purchase, install, start-up, and test 18 (18 each) 40 kW IRCs, three units in each enclosure.

5.6. Task 6: Purchase, install, integrate, and test 18 (18 each) underfloor differential pressure sensors and controls contacted to specified existing CRAH in Room 145 and Room 147.

5.7. Task 7: Purchase, install, start-up, and test 12 (12 each) static transfer switches (STS) and 12 (12 each) 200 kVA PDUs in Computer Room 147 to support IT equipment.

5.8. Task 8: Purchase, install, start-up and test four (4 each) STSs and four (4 each) 200 kVA PDUs in Room 180. The four new STSs and PDUs shall be paired as four sets with two on the A-bus and two on B-bus critical power.

5.9. Task 9: Purchase, install, start-up, and connect four (4 each) 30-Ton CRAH units with differential pressure sensors and controls in Room 180.

5.10. Task 10: Purchase and have installed all necessary BAS Controls systems on new equipment through the DISA Facilities BAS services contractor, SPEC LLC.

1. Performance Requirements.

0. Task 1: Develop detailed project schedule, investigate existing conditions, prepare and submit shop drawings for approval by the Government. Prepare and submit product data and submit a start-up and testing plan for new equipment, to accomplish the project requirements as identified in this PWS and on the Design Concept Drawings (Appendix A).

0. Develop Detailed Project Schedule with phasing plan. The Contractor shall develop and submit for review and approval a detailed project schedule. Project schedule shall be developed using Microsoft Project or similar program. Schedule shall use ‘critical path’ method and identify all milestones; the schedule shall include start date, submittal dates, key milestone dates, and completion dates, as a minimum. The project schedule shall incorporate a phasing plan and MOPs to maintain the existing operational mission. The contractor’s plan shall include, but not limited to: Quality control plan, protection of existing systems to remain, building access, location of dumpsters, contractors’ trainer, and phasing of the project execution. The project schedule shall be reviewed at monthly progress meetings.

0. Investigate Existing Conditions. The contractor and subcontractors shall perform site visits and review the as-built drawings, as necessary, to gather information on existing conditions and have a complete understanding of existing conditions and required work. The contractor shall investigate and verify all existing conditions, including (but not limited to) working conditions, access, and other items/systems, as required. DISA’s existing record drawings will be made available to the contractor, but these record drawings should not be viewed as complete and accurate. The contractor shall field verify all existing conditions.

0. Prepare and submit detailed shop drawings and product data (as required).

0. Prepare and submit a plan for the connection, start-up, and operational testing of all installed power and cooling equipment, IAW American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE) 202- 2013 and the factory start-up testing procedures.

0. The contactor shall take precautions to ensure no computing equipment will be taken offline (power or IT communication loss) during the replacement/installation of the raised floor panels and components. The contractor must ensure, before raised floor panel replacement, that they can move the IT rack(s) and keep the IT equipment operational while replacing the raised flooring underneath the piece of equipment. Racks are connected with power cables and IT cabling via cable tray under the raised floor.

0. Task 2: Raised Floor Upgrade.

1. Contractor shall replace the raised-access floor panels in Rooms 145 (approx. 1,152 sf) and Room 147 (approx. 31,388 sf) to include any damaged floor structure, stringers or pedestals, and associated plates and connections as required. Access Floor Specification is provided at Appendix B.

0. Access Panels shall be concrete core (Concore) 2500 psf strength capacity to fit on the existing access floor structure.

0. There are approximately 8,076 panels with a requirement to provide and install approximately 7,700 solid panels and 376 perforated panels. Perforated panels shall be steel, 25 percent perforation and 1,250 psf strength. Contractor shall verify floor panel count on site.

0. An additional 75 perforated panels and 150 solid panels shall be provided on pallets as spare panels for future use by the Government.

0. Cut-outs shall be done on panels for IT and power cabling on edges of panels. No center cut holes in panels shall be used for cable access. Cutting shall be done outside the raised floor environment to avoid dust and debris near the IT equipment, unless required to remove existing panels with center access holes, which shall be done with high-efficiency particulate air (HEPA) vacuums in use.

0. Grommets shall be installed to cover cut-outs in access floor panels.

0. The raised access floor shall be removed and replaced in incremental sections so as not to disrupt the temperature-controlled climate in the data center room.

0. Phasing plan shall be developed to allow continual operation of IT racks and limit the number of open floor area to maintain cooling to the racks. The phasing plan shall be submitted for Government review and approval.

0. The finished raised floor shall be level to meet the tolerance criteria as stated in the Access Floor Specification at Appendix B. Laser-leveling device shall be used to ensure floor is level.

1. Replace or upgrade, as needed, the access flooring structure to support required load capacity of 2500 psf. The pedestals and stringers have been determined, through separate engineering study, to be adequate to meet the 2500 psf requirement and shall remain in place unless found to be damaged, requiring replacement.

0. Cleaning shall be performed using vacuums equipped with HEPA filtration systems, removing all dust and debris from the sub floor area. Vacuums capable of capturing particles as minute as .3 microns at a 99.97 percent efficiency rating will be utilized.

0. Protect the existing cable tray under the raised floor and support the trays, as necessary, during access floor system upgrade.

0. Leak detection cable system shall remain in-place and operational around the CRAH units. Care shall be taken to prevent damage to the under-floor leak detection system.

0. SRG grounding system shall be upgraded to meet the SRG requirements in MIL Standard 188-124B (most current) at Appendix C. This SRG upgrade will expand on the existing grounding system to a 2’x2’ grid and will be bonded to IT racks. If access floor pedestals need to be replaced, reattach the existing SRG grounding wire, as required.

0. Task 3: Purchase and install six (6 each) cold aisle containment enclosures.

2. Contractor shall purchase and install six cold aisle enclosures for DISA IT equipment racks in Computer Room 147, as shown on Design Concept Drawings (Appendix A). The enclosures shall be self-standing at industry standard height of approximately 78 inches, complete with sliding doors on each end of the cold aisle, a roof system to cover the top of the cold aisle that extends the entire length of the aisle and connects to each door assembly, and removable side panels for ease of rack installation. Width of enclosures is approximately six feet (6’) wide, by a length of twelve feet (12’) for short aisles and sixteen feet (16’) for two longer aisles, as noted on drawings. The enclosure shall meet the following requirements:

2. Sliding door at each end of the enclosures shall be manually operated and provide unobstructed access, with a maximum clearance. Assembly shall cover completely the end of row’s typical rough opening of approximately 72 inches wide by 78 inches high.

2. A ceiling shall cover the top of the cold aisle completely, extend the entire length of the cold aisle, and connect to each double sliding door assembly at the ends of the aisles. Bracing shall be provided, as required, to provide a stable and rigid structure. Roof light transmittance, per American Society for Testing and Materials (ASTM) D1003, shall be 85% minimum.

2. The cold aisle containment enclosures shall comply with all requirements of National Fire Protection Association (NFPA) 75 standards, and automatically allow for entrance of clean agent into the CACS in the event of a fire.

2. Fire system connections shall be made for any retractable roof of the enclosures to the appropriate fire alarm panel to ensure activation of the roof mechanism to retract, as required.

2. If required, electrical requirements of any motor for the retractable/removable ceiling typically requires 120V/1PH/60 Hz. Circuit capacity shall be manufacturer specific. All wiring shall be in conduit and connected to a dedicated branch emergency backup power supply circuit to ensure that the retractable ceiling will operate during a facility power outage.

2. Blanking panels shall be provided to allow for the removal, repositioning, and/or the replacement of IT equipment racks with minimal modifications. The blanking panel sizes are determined by the layout of the cold aisle containment provided in the location plan.

2. The entire containment system shall be airtight.

2. Grommets and/or blanking plates will be used to accommodate variances or discrepancies in the IT rack heights and ensure an airtight seal.

0. Task 4: Purchase, install and test two (2 each) chilled WDUs in Room 147.

3. Contractor shall provide, install, and connect two (2 each) WDUs with manifold to support the IRCs. An acceptable WDU product is Liebert Water Distribution System model number WDS12BP0, or an approved Government equivalent that meets the following requirement:

0. Each WDU shall be able to support up to 12 (12 each) 40 kW IRCs with bottom supply and return connections.

3. The WDUs shall be installed IAW the Design Concept Drawings (Appendix A). Verify final location with site, prior to installation.

3. The chilled water piping supporting each WDU shall be connected to the existing underfloor chilled water distribution loop in a rectilinear fashion, as shown on the design concept drawings.

3. The contractor shall connect each WDU to the existing 6-inch diameter underfloor chilled water pipes with new 3-inch diameter branch chilled water supply and return pipes. When connecting to the existing 6-inch diameter chilled water pipes, the contractor shall install two (2) 6-inch diameter by 3-inch diameter tee fittings (one each for supply and return pipes) at locations shown on the design concept drawings. The contractor shall verify the length and make any adjustments during the pre-bid walk-through. No piping will be placed in the cold aisles and restrict cooling air flow to perforated floor tiles.

3. Contractor shall coordinate the isolation of the chilled water distribution in order to install WDU tee fittings with and receive approval from DISA and site facilities.

3. Contractor shall provide and install the following ancillaries for each WDU branch chilled water piping: 1) branch isolation valves at the main connection, 2) a strainer with blow down valve and capped hose end connection on the chilled water supply branch with isolation valves, 3) a strainer pipe by-pass for servicing, 4) a strainer with blow down valve and capped hose end connection on the by-pass with isolation valves. Refer to design concept drawings for piping schematic and details.

3. The insulation for all piping shall be flexible closed-cell elastomeric. The seal face shall be taped after the adhesive has been applied and has cured. Elastomeric shall be provided in lengths no less than three (3) feet, unless the piping is less than three (3) feet or unless the end of the pipe requires a shorter piece.

3. Labeling of WDUs shall be IAW DISA Identification, Labeling and Marking standards (Appendix J – Label Standard). Label shall reflect: WDU -1-x-01 and WDU -1-x-02

0. Task 5: Purchase, install, and test a total of 18 (18 each) 40 kW IRCs, three units in each enclosure.

4. Contractor shall install three (3 each) 40 kW chilled water type IRC into each of the six new cold aisle containment enclosures, in accordance with the Design Concept Drawings (Appendix A). Verify final locations with site prior to installation. IRCs shall be manufactured by APC, Vertiv (formerly Liebert/Emerson Power) or a Government-approved equivalent that meets the following requirements:

0. IRC modules shall be designed to produce cooled air at specified capacity with chilled water supplied; generally at 45 to 55 degrees F and within 10 degrees F. Chilled water supply temperatures and change of temperature range may vary, and shall be verified.

0. IRC modules dimensionally shall fit within a standard tile’s (24 inches) width, and its maximum height shall be of a typical 42U type rack of approximately 78 inches high.

0. IRC cabinet shall have a frame constructed of 16-gauge (minimum) welded, formed steel with exterior panels of 18-gauge (minimum) steel and insulation on the interior sides of 3.7 pounds per cubic foot (minimum). Front and rear panels shall be hinged door-type or detachable, constructed of 18-gauge (minimum) perforated steel with 69 percent free area (minimum). Doors/panels shall be equipped with a keyed lock to provide means of securing access to internal components. Cabinet and panels shall be powder-coated black.

0. Internal components shall be serviceable from the front and rear panels and not require removal from the rack row to perform standard maintenance, repairs, or internal component replacement.

0. IRC units shall include casters and leveling feet to allow ease of installation in the row and provide a means to level the equipment.

0. IRC fans shall be direct drive, variable speed, electronic commuted (EC), and dynamically balanced. The fans shall be configured for a draw-through arrangement to provide uniform air flow over the entire face of the coil and maximum performance. Fans shall be soft start type to minimize in-rush current when starting.

0. Units shall utilize a copper tube/aluminum fin coil system and shall be designed to maximize face area, decrease face velocity, and minimize pressure drop. The coil shall be configured in a counter flow design to optimize heat transfer.

0. IRC units shall contain a factory installed condensate pump with dual float control and alarm. Each unit shall be equipped with a stainless steel corrosion-free condensate catch pans.

0. Air filters shall be 30 percent efficient per ASHRAE 52.1, Underwriters Laboratories (UL) Class 2 (minimum efficiency reporting value 8 per ASHRAE 52.2).

0. IRC will have a local graphic monitoring/control display affixed to the unit and will be microprocessor-based. The display shall be capable of reporting all status and alarm conditions. Each unit shall also have a Modbus communications connection.

0. Control systems on each IRC shall comply with, but not limited to the following: 1) A network management card to provide controls management through a computer network. Management through the network should include the ability to monitor and control each unit. 2) An appropriate communication card or hardware to support connecting to a site’s BAS as well as being graphically represented on the BAS. The communication protocol shall be BacNet, to comply with DISA standards.

4. IRCs shall be installed per manufacture’s recommendations and connected to new WDUs (refer to Task 4). The length of the water lines longest run from the WDU to the IRCs is approximately 40 feet or less.

4. Installation of three IRCs into each enclosure shall have chilled water line connections to the new WDUs with 1-inch multi-layer composite PEX tubing or equal, PEX-AL-PEX-type, formed with proper bend radii to prevent flattening. Chilled water pipes shall be completely insulated with closed cell elastomeric insulation, per ASHRAE standard.

4. Chilled water piping shall be routed under the raised floor in the rack rows hot aisle and connected at the rear of each IRC unit. No piping will be placed in the cold aisles, to avoid restricting cold air flow to perforated floor tiles.

4. Chilled water valves shall be modulated by a micro-processor controlled two-way valve to maintain optimum cooling performance.

4. Condensate drain line of 1-inch diameter shall be routed to the nearest floor drain for each IRC. If the condensate drain lines are combined, the drain line size shall be approved by the Government.

4. Remote rack inlet temperature sensors (three minimum) shall be provided with each unit for field placement and connection to the IRC module, with approximately 20 feet of cable. Microprocessor shall accept inputs from rack inlet temperature sensors to control IRC unit.

4. IRCs shall be connected to the existing BAS system to allow monitoring of the unit status, temperature settings, and output.

4. Electrical system of the IRCs shall comply with the input voltage, shall be 480 volts alternating current (VAC) at 60 Hz.

4. Main disconnect switch for each IRC shall be front-panel mounted to provide a means of disconnecting power. This disconnect switch shall be non-locking.

4. Install new electrical panels and feeders for power to the IRCs. Panel EDP-A4-1 is to be fed from existing panel EDP-A4. Panel EDP-B4-1 is to be fed from panel EDP-B4. New panels are to be located at Column K-3.

4. Route the electrical supply for each new IRC to identified electrical panels, as shown on the design concept drawings. No splices are allowed. All wiring shall be in correctly sized conduit. Contractor shall install all required, correctly sized breakers.

4. Labeling of IRC units shall be IAW DISA Identification, Labeling and Marking standards (Appendix J – Label Standard). Labels shall reflect: IRC-1-A (or B)-01 through IRC-1-A (or B)-18.

0. Task 6: Purchase, install, integrate, and test (18 each) underfloor differential pressure sensors contacted to specified existing CRAH located in Room 145 and Room 147.

5. Contractor shall provide and install 16 (16 each) underfloor differential pressure sensors and modify the controls for the existing CRAH unit zones in Room 147 and two (2) CRAH units in Room 145, IAW the Design Concept Drawings (Appendix A).

5. CRAH controls shall be adapted to incorporate underfloor pressure differential sensors to modulate EC plug fan speeds, based upon a pressure sensor set point and maintain room cooling set point.

5. CRAH units shall communicate and work together as a team so that all CRAH units shall modulate fan speed to maintain underfloor pressure set point.

5. Pressure differential sensors integrated with the CRAH units shall be monitored by the existing BAS.

5. CRAH units shall be controlled to maintain a stable static pressure of 0.1-inch water-column gauge (w.g.) (adjustable) and chilled water control valves shall modulate to maintain 55 F (adjustable) supply air temperature.

5. The sensors and controls shall be designed and manufactured to be compatible with existing Liebert CW CRAH units with Liebert iCOM® controls.

5. Sensors and controls shall be installed IAW DISA Control Specifications, Div 23 and 25 (Appendix G), and manufacturer’s recommendations.

5. The type of differential pressure sensors shall have to be approved by DISA and shall be selected from sensors used in similar applications.

5. The CRAH units shall satisfy the recommended temperature range as per the most current version of ASHRAE TC 9.9 Thermal Guidelines for Data Processing Environments.

5. The CRAH unit controls shall be tested to validate control methodology and cooling performance. Adjust set points during testing to maintain CRAH unit return and room temperatures as required.

0. Task 7: Purchase, install, start-up, and test 12 (12 each) Static Transfer Switches (STS) and 12 (12 each) 200 kVA PDUs in Computer Room 147 to support IT equipment.

6. The contractor shall provide and install the STS and PDU sets in Room 147, where designed on the design concept drawings. Verify final locations with site prior to installation. The new PDUs and STS units shall be paired as sets.