RFI_001_18-1101_Answered.pdf

FA255019RA010 B600 Upgrade 18-1101 RFI 001

1) Is the cable being replaced, or spliced? Both are required in the docs.

Government Response: Replaced.

2) E102 Feeder Schedule indicates cable is to be TRXPLE

This is a utility spec, and not used anymore for power cable. Is MV105 PER insulation acceptable?

Government Response: Okoguard Type MV-105 15kV EPR Shielded Power Cable is acceptable because it is easier to handle than TR-XLP cable. All MV cable requires special handling and installation that meets the manufacturer’s warranty specifications.

3) Are the 4160 fused switches on the load side of the transformers to be removed as well?

Government Response: Yes

4) What are the dimensions of the existing equipment incoming bay and switch length and width?

Government Response: Contractor needs to document and replicate existing as required.

5) Is a more specific transformer specification available? If not please provide information on windings, oil type, switches, etc. i.e. copper windings, FR3 oil, etc.

Government Response: Basis of design is Eaton Transformer, all copper windings, K-9 or better rated, NEMA Envirotherm FR3 oil, include over-temperature, pressure, &

Acetylene gas buildup detection with direct reporting to B600 ATCC through existing

“HSQ” EMCS monitoring network. Replace all type 1 Surge Protective devices on transformer secondary with new indicating and circuit breaker Eaton SPDs. Medium

Voltage transformers shall be enclosed in NEMA 4 rated locking Metal-Clad enclosures.

See SOW and Design for more transformer details.

6) If load side switches are to be removed, can vacuum fault interrupter switches be provided to replace the old fused gear?

Government Response: Yes as long as windows are provided to view switches.

7) What is in the large Junction Box? Is that the connection point of the neutrals from the generators?

Government Response: Unclear what junction box is being referred to. The Junction cabinet labeled as number one on the drawings is to remain. Some of the transformers enter through this box and some enter the building to the east.

8) Is the Neutral Ground Resistor (Ref. KN7 on E101) 12,470 or 4,160 Volts?

Government Response: SOW directs contractor to replace to duplicate existing with new like grounding resister in a new NEMA 3R rated enclosure. Non-inductive, voltage, temperature range, current, time, and other ratings need to be researched by the contractor and cut-sheet submitted for government approval. Picture of the name plate provided.

9) As the intake dampers for DGN 1 thru 7 are to be replaced can the government provide pictures of each of the intake plenums/ductwork (with emphasis on DGN 1 thru 3)?

a. If pictures are not available can as built drawings of the 2009 generator replacement be provided? DGN 1 thru 3 have mechanical piping routed below the intake plenums/ductwork. We are trying to determine if this piping will need to be temporarily removed to allow access to replace the dampers.

Government Response: Pictures will be provided.

10) Fire Sprinkler Line - At the site visit it was noted, there is a fire sprinkler line directly below the fan actuators that are to be replaced.

a. Please provide fire sprinkler system as-builts for this area.

b. We assume the building is occupied so we won’t be able to cap off the line temporarily. This line could serve other sprinklers throughout the facility so if it needs to stay in service we will have to reroute it to keep the fire sprinkler system in service.

c. Does this line have sprinklers or is it a bulk run of main?

d. Is this a wet, dry, deluge or preaction system? Dry

Government Response: As-Builts unavailable on short notice, No work to the fire suppression system is expected. Exhaust fan should be removed and installed through the roof to prevent the need for rerouting of multiple systems below them.

11) Single Line Drawing - Attachment 3 Design Drawings_PDF_Exhaust Fans indicates on

Title Sheet G001 that there is a sheet E-203 Electrical One Line Diagrams. This sheet is missing from the file. Please provide this sheet.

Government Response: Will be provided in Solicitation Amendment 001.

12) Conduit in Transformer Yard - Attachment 0_-_GLEN18-1101_SOW_10July19 states in

Paragraph 2.3.3.b and 2.3.3.d “The underground portion of the conduits shall be removed and disposed of.” A note on Sheet ED-100 indicates “DEPEND ON THE EXISTING

CONDITIONS OF CONDUITS CONDUITS MAY BE REUSED, COORDINATE

WITH PROJECT MANAGER.” Based on these two statements it is unclear how the

Contractor should bid the work. Please clarify what scope related to these conduits should be included in the work.

Government Response: All underground conduit shall be replaced. Any conduit above ground or in the building should be reused unless damaged.

13) Staging - Would you please identify that laydown area that will be made available to the contractor for staging a storage container, and small office trailer?

Government Response: Contractor laydown yard and material storage yard area will be provided in the RA on base. A construction trailer site will also be provided by the base for the contractor to locate a trailer during contract POP. This space will not be Located adjacent to the B600 work site. Contractor trailer will not be provided with government supplied utilities or hook-ups. Contractor must supply own utilities.

14) Facilities - Are portable toilets to be provided for this work? If so, where should they be staged?

Government Response: No, the facilities in 600 may be used by the contractor.

15) Escorts - Please refer to Attachment #1 – SAFB Security Requirements, Section 01 55 04

Paragraph 1.24 Escorts. This section indicates, as follows. “1.2.4.1 The Contractor shall be responsible for providing their own security escorts for the duration of this contract

(including option years). Security escort personnel shall comply with the provisions detailed in Circulation Control, paragraph 2.3.” This same topic is again addressed in

Attachment #0 Statement of Work. Paragraph 9.4 through 9.5. Is the contractor required to provide any security escort during this project? If so, where can this escort be obtained?

Are they to be present at all times during the work? And what is the cost?

Government Response: Contractors are to go through the security badging process or they can find available escorts (highly unlikely).

16) Color of Transformers - Attachment 0_-_GLEN18-1101_SOW_10July19 paragraph

2.5.1.d states “The transformers shall be factory painted in Architectural Brown TR-0611-

442 (or equivalent) per FEP. This color is the same as Munsell NEMA Brown 1.6YR

1.2/1.1. Shades that vary in any capacity from this color will not be acceptable.”

Attachment 4 Design Drawings_PDF_Transformers Replacement indicates on Sheet EG-

101 Typical Pad Mtd Transformer Details Note 6 “FINISH COLOR FOR OUTDOOR

CABINET SHALL BE MANUFACTURER’S STANDARD GREEN.”

Please confirm the desired color.

Government Response: The transformers shall be painted Brown to match the requirements in the SOW and FEP. Manufacturer’s standard is Munsell NEMA Brown so this is not a special color for equipment providers.

17) PCB’s - Please confirm that existing transformers do not contain PCB’s in their oil.

Government Response: PCBs are not present in existing transformers.

18) Transformer Pads / Windows - Attachment 4 Design Drawings_PDF_Transformers

Replacement indicates on Sheet CP-101 Keynotes 2-8 “EXISTING TRANSFORMER

PAD-PROTECT IN PLACE.” It is unlikely that the new transformer windows will line up properly with the existing transformer pads. Should the Contractor include replacement of the existing transformer pads in the scope of work to the extent necessary to coordinate the new transformers / window openings?

Government Response: Yes.

19) Grounding Resistor

- Would you be able to provide the voltage?

- Is NEMA 3R ok for this?

- Do we have any critical dimensions to worry about?

Government Response: A picture of the name plate is provided. As stated in the revised

SOW, replace existing resistor and enclosure with exact replacement. Cut-sheet shall be submitted by the contractor for government approval. Equipment must fit in the walled area and have proper clearance.

20) Pad mounted Transformers

- What are the critical dimensions that we must adhere to? Overall length, width, and height would be great. The one-line diagram with some pad dimensions is slightly confusing.

- Can we confirm which fluid is wanted, FR3 or mineral oil?

- I cannot see inside the cabinet to see what is existing, but the general drawings do show standard gauges. Is this all we need or are we needing anything more?

Government Response: Replace as directed in revised SOW. Eaton basis of design transformers meet requirements. Eaton uses Envirotherm FR3 fluid. Overall dimensions of replacement transformers shall meet ATFP, Minimum Distance from ground to live parts space, permit NEMA70E safe operation/service space, and permit cooling of transformers. Medium Voltage Metal Encased NEMA 4 enclosure is required for transformer enclosures.

21) Substation Style Transformers

- What are the critical dimensions that we must adhere to? Overall length, width, and height would be great.

- The one-line diagram pictures show a full height flange on the primary, is this correct?

If so, what are we closed coupling to?

o If we are not doing a full height flange, is a full height ATC ok?

- The one-line diagram shows a full height flange that has an ATC bolted to it (at least from my point of view)?

o Is this correct? If not, are we doing a full height ATC?

- What accessories are needed on the substation transformers besides the standard liquid level gauge, pressure vacuum gauge, and liquid temperature gauge?

- Can we confirm which fluid is wanted, FR3 or mineral oil?

- Specifications on the desired wire?

Government Response: See revised SOW Addendum and previous explanations.

- In addition, if you could please provide additional information on the MCC Bucket

Replacements:

Our application engineer is requesting additional information on the existing MCC gear in order to properly quote the buckets. If you could try and provide reference order #’s of the existing gear, or further information on what type of gear is existing and what model, that will help them make sure they can build the 3RW40’s in the certain MCC’s we support.

There is some Tiastar information, however, our application engineer is still requesting the reference order of the existing gear, to assure we match the specs of the existing gear and limit our risk.

Government Response: Pictures are provided in Solicitation Amendment 001.

22. Please clarify if the existing Exhaust fans backdraft louvers (attached to the bottom of the curb) are to be demolished or reused.

Government Response: These should be replaced with the rest of the exhaust fan assembly.

23. Please provide roof type and contractor holding warranty of roof.

Government Response: No warranty information is available for the roof. No roof work is expect under this contract existing curbs can be used to seal new exhaust fans.

24. Will FAR Clause 19.1308 be enforced? For construction by special trade contractors, at least 25 percent of the cost of contract performance to be incurred for personnel using the concern’s employees. If there is a joint venture does the joint venture need 25%. Please advise if the proposal should include how we will meet this requirement.

Government Response: Contractor is to comply with FAR 19-1308 and the applicable clauses for the requirements of FAR 19-1308(b) and (c).

25. What is required for commissioning?

Government Response: Contractor shall coordinate with the plant manager and commissioning shall be performed with plant operators present. Plant operators shall be trained in the proper operation of all new equipment. The commissioning agent does not need to be independent from the contractor as long as the government approves the commissioning plan and witnesses/accepts the final testing to meet the government’s specifications.

26. Please advise if Easy Genz controls to be used for programming?

Government Response: Easy Genz would be the controls for individual generators and were used as the basis of design.

27. Please provide names of companies who have supported programming in the past.

Government Response: Winn-Marion, and Electric Power Systems. For electric power &

MCC’s Eaton Applications Engineering out of Northern Colorado engineering applications center. “HSQ” for the controls and monitoring. For the Caterpillar generators

Caterpillar Engineering, Woodward for the synchronizers and load controllers. Chris Price from Generator Power in Virginia for generator controls.

28. Does the sprinkler pipe need to be relocated beneath the exhaust fans. Is the sprinkler pipe

Dry or wet system?

Government Response: Dry system the exhaust fans should all be removed and replaced from the roof side to prevent the need for rerouting of multiple systems below them.

29. The transformers have a long lead time. Will the POP be adjusted based on the lead time?

Government Response: If a long lead time, the NTP can be issued after the material submittal approval.

30. Is a Bid Bond required?

Government Response: No. Only Performance and Payment Bonds are required.

31. Please provide photos of the existing fresh air intake louvers.

Government Response: Provided in Solicitation Amendment 001

32. Will there be pre-reading required for TAB on the existing Exhaust Fans? Do you require readings at the intake dampers?

Government Response: Yes, No.

33. How many transformers can we have down at a time and for how long?

Government Response: Transformers out of service require backup transformers on site and in service to maintain mission. No transformers can be removed from service unless backup transformers are on-site and replace the transformers being replaced.

34. How exactly are the new controllers going to interface with the existing controls?

Government Response: Existing controls are to be replaced, operation of new controllers shall functionally replace the existing controller’s functional operations.

35. Is there a control schematic that details the current design that we can have access to? This would allow significantly greater pricing accuracy.

Government Response: Yes. Provided in Solicitation Amendment 001.

36. Keynote #12 on ED-100 states "REMOVE AND DISPOSE PRIMARY AND

SECONDARY FEEDERS OF TRANSFORMERS" but is not actually shown on the sheet.

Is this to mean that we are to reuse existing wiring or is note #12 applicable even though it's not indicated on the drawings?

Government Response: Replace

37. What are the detailed environmental hazard disposal procedures for SAFB regarding PCB oils in existing transformers?

Government Response: See section 7 of the SOW for environmental requirements. No

PCBs are present in existing transformers.

38. Can we utilize existing interior raceways and conductors for controls and exhaust fan feeders?

Government Response: Raceways may be reused, conductors shall be replaced.

39. Can we utilize existing roof penetrations for exhaust fan conduits?

Government Response: Yes

40. How many exhaust fans can be down at a time and for how long?

Government Response: Exhaust fans can all be taken down at the same time, bay doors can be opened to allow ventilation. This should only be for a brief period however.

41. Who is responsible for disconnecting line side of transformers?

Government Response: Government electricians will disconnect but contractor is responsible to work on and replace all electric after site electric is locked out and tagged out by the government’s electricians. Contractor is responsible for safe adherence to

NFPA70E work practices and all protective gear required by contractor’s workers.

42. Are the existing transformer pads to remain or to be replaced?

Government Response: Transformer pads shall be replaced.

43. Please provide nameplate pictures of the transformers to be removed and any supporting documentation for the existing transformers from previous installation documentation.

Government Response: Provided in Solicitation Amendment 001.

44. Please provide nameplate pictures of the MCCs and individual bucket nameplates feeding the exhaust fans.

45. Please confirm that the Neutral Ground Resistor (NGR) will be replaced.

Government Response: Yes the neutral ground resistor shall be replaced.

46. Please show locations of SWBD CIL, SWGR MVMC, SWGR MVMCC, GSA and GSA1 on floor/site plan.

47. Please confirm that existing underground conduits in scope of work are to be demo’d and replaced with new.

Government Response: See previous responses.

48. Please provide pictures of areas walked at site visit.

Government Response: Pictures will be provided in Solicitation Amendment 001.

49. RFP is calling for removing and replacing underground conduits from transformers but also says to reuse existing transformer pads. Tunneling under these pads for demo and installation of the new conduits does not seem prudent. Please advise.

Government Response: See previous answers.

50. Please provide sign-in sheets from the site visit.

Government Response: Sign-in sheet and meeting minutes posted to FBO with RFI responses in Amendment 001.

51. Are model numbers/cut sheets/specifications available for existing for all existing gear including switchgear A and A1?

52. Transformer questions:

a. Will the old transformers need to be hauled to scrap yard?

Government Response: All demoed material shall be disposed/recycled appropriately.

b. Crane support for dressing out transformers with oil coolers or will they come in ready to set in place.

Government Response: Contractor must provide

c. Do we have a weight on the old transformers?

Government Response: Stated on Nameplate

d. Are we able to leave crane onsite overnight if the project is set to go multiple days?

Government Response: Yes as long as the crane is locked and secured by the contractor. Crane should not be left in location that obstructs other plant operation.

The government construction manager shall determine location.

e. Do we need to plan on having a crane receive the transformers on site and stage in close proximity to project area prior to project date?

Government Response: This would be up to the contractor whether they want to pre-stage the transformers.

f. FCC permit required. Lead time for planning purpose.

o Tip height requirements that might ease special permitting.

o Communication requirement for base operations.

Government Response: -Unsure what this is asking. -Short range two way radios can be used but must be cleared through security.

g. Any requirement for % of chart on the crane size?

Government Response: Yes as required by crane safety & OSHA regulations.

h. Will certified load test be required prior to crane activities?

o If so can transformer be used for test weight or will test weight need to be brought in?

Government Response: Crane can be certified off site. Transformer can be used.

Test weights not required by base.

i. Will two certified riggers/Signal people one on each side of screen wall be required?

Government Response: If required to meet safety requirements yes.

j. Radio communication with crane operator?

Government Response: Yes, simple two-way radios are permitted in the RA so long as they do not include advanced capabilities.

k. Will all transformers be swapped out in one day? If not, how many days.

Government Response: It is the contractor’s discretion on how to accomplish the requirement.

53. Exhaust Fan questions:

a. Will the old fans need to be hauled to scrap yard?

Government Response: All demoed material shall be disposed/recycled appropriately.

b. Do we have a weight on the old fans?

Government Response: No

c. Can all the fans be swapped out in one day?

Government Response: It is the contractor’s discretion on how to accomplish the requirement. Fans can all be taken down at the same time.

54. Can we get a copy of the power one-line of the CUP?

55. Can we get a copy of the current communications one-line?

Government Response: Not available.

56. What is the maximum cable run distance from the PLC controls to the last generator?

Government Response: Unknown.

57. What is Schriever AFB’s preferred communication protocol?

Government Response: Ethernet

58. What is the current communications hardware/wiring?

Government Response: Hardwired no wireless is allowed.

59. What is the current sequence of operations (SOO) for the paralleling switchgear system?

Government Response: Will be provided post award.

60. Does Schriever AFB want to maintain this SOO or are changes desired? If changes from the current SOO, please specify the changes. Will Schriever AFB consider an alternate custom engineered solution that satisfies the intent of the specification but will use components that deviate from the specification?

Government Response: No, deviation from the specifications is not requested

61. Will Schriever AFB allow the installation of a new structure, Hoffman Box or other, if needed for the generator paralleling controls?

Government Response: Existing box should be adequate. If not a plan will need to be approved.

62. Please elaborate on “The operator shall be able to make changes in the sequence of operations without having to learn PLC control language or any special programming language”. Page 7 of the SOW Project Number: GEN18-1101 Page 7 Section 2.5 item g

Government Response: The operator should be able to make changes to the system through a digital control interface that does not require advanced training to use.

63. What changes would the operators have the capability to make?

Government Response: Sequence of operation, on, off.

64. Does Schriever AFB want automated reporting? If so, please provide the what parameters are to be include?

Government Response: Yes a physical print out is required, the printer does not need to be replaced under this contract. Generator status and time is to be reported.

65. What site acceptance testing is required for the new generator controls?

Government Response: Full sequence of operations with multiple outages will be performed with the plant manager present.

66. Will a virtual or factory witness test of the new generator controls be required prior to installation? If so, what are the test requirements?

Government Response: No, but preferred. The bases of design was chosen based on the plant manager’s experience with the system.

67. Will the Kick-off meeting participation by WebEx or other virtual meeting platform?

Government Response: In-person.

68. Are electronic copies, AutoCAD or other, of the existing generator switchgear and control system(s) including the power envelope available? When will these be available?

Government Response: These will be provided after award.

69. Is a technical manual available for the generator and the generator mounted control panel available for use in proposal preparation?

Government Response: Not available.

70. What voltage regulators (Manufacturer, make, model part number) are used on each generator?

71. What are the dimensions of each generator switchgear cubicle door?

Government Response: Unavailable.

72. What are the interior dimensions of each generator switchgear cubicle?

73. What are the dimensions of the paralleling controls cabinet that houses the current PLC?

74. What are the interior dimensions of the paralleling controls cabinet?

75. Will As-Built Drawings and manuals that detail the new generator paralleling switchgear controls only be acceptable?

Government Response: No

76. What operator training is required for the new generator paralleling switchgear controls?

How many sessions?

Government Response: This training must be coordinated with the plant manager and operators. A single session is acceptable if adequate to inform them of proper operation.

See #65.

77. Pictures Requested

Overview of the generator paralleling switchgear (from left to right, top to bottom):

Front of each cubicle door with a detail of the existing controls to include lights, annunciation tiles, switches and controls.

Back of each cubicle door with detail of the back of each component and dataplates to include the manufacture, model and/or part number if visible.

An overall picture of the interior of each cubicle.

A detail of each major component inside of each cubicle to include manufacturer, model and/or part number if visible.

A detail of the hinges and latch assemblies

The front of each breaker cubicle with breaker designation.

A detail picture of each breaker dataplate to include manufacturer, model and/or part number.

A detail picture of each breakers trip unit and accessories to include manufacturer, model and/or part number.

An overall picture of switchgear controls cabinet that currently houses the exiting generator paralleling PLC and controls.

A detail picture of the door(s) of the existing controls cabinet with a detail of the existing controls to include HMI, lights, annunciation tiles, switches and controls.

The back of the door(s) of the existing controls cabinet with detail of the back of each component and dataplates to include the manufacturer, model and/or part number if visible.

A detail of each major component inside of each cubicle to include manufacturer, model and/or part number if visible.

A detail of the hinges and latch assemblies

An overall picture of the station batteries used in either the generator paralleling switchgear or switchgear controls cabinet to show the total number of batteries.

A detail picture of one of the station batteries to include manufacturer, model and/or part number.

Government Response: Provided where available

78. Contractors are to include any assumptions or clarifications in the proposals. This includes anything that is not clear in the requirement documents.