Amendemnt 2 RFI Questions 21_B_0003_FTHD_26 APR21.pdf

W9115121B0003

0011583231 AFA911899P

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

This amendment is issued to provide the follow ing:

A. Agenda/ sign-in roster.

B. Responeses to Industry questions RFI's.

C. All other terms and conditions remain unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 11

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

16C. DATE SIGNED

BY 23-Apr-2021

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street , County, State and Zip Code) X W9115121B0003

X 9B. DATED (SEE ITEM 11)

02-Apr-2021

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

21-Apr-2021

CODE

MICC - FORT HOOD

36000 DARNALL LOOP, ROOM 1300B

FORT HOOD TX 76544-5025

W91151 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION 00010 - SOLICITATION CONTRACT FORM

TABLE OF CONTENTS

The Table of Contents has changed from:

Exhibit/Attachment Table of Contents

DOCUMENT TYPE DESCRIPTION PAGES DATE

Exhibit A Technical Exhibit A -

Specifications

3313 11-JAN-2016

Exhibit B Technical Exhibit B - Drawings

22 15-DEC-2020

Exhibit C Technical Exhibit C - As- Builts

73 22-JUN-1982

Attachment 1 Attachment 1 - Appendix A

120 04-AUG-2016

to:

Exhibit/Attachment Table of Contents

DOCUMENT TYPE DESCRIPTION PAGES DATE

Exhibit A Technical Exhibit A -

Specifications

3313 11-JAN-2016

Exhibit B Technical Exhibit B - Drawings

22 15-DEC-2020

Exhibit C Technical Exhibit C - As- Builts

73 22-JUN-1982

Attachment 1 Attachment 1 - Appendix A

120 04-AUG-2016

Attachment 2 Agenda/Site Roster 4 12-APR-2021

The following have been added by full text:

RESPONSE TO INDUSTRY QUESTIONS

REQUEST FOR INFORMATION (RFI)

CONSOLIDATION LIST

W91151-21-B-0003

REPLACE HVAC BLDG 7050

1. Q. Confirm reuse of existing duct detectors at AHUs 1-9? Or will new duct detectors be required?

ANS: Contractor shall install two new duct smoke detectors for each new AHU as shown in M-701.

2. Q. Confirm TAB will be required for all new equipment and associated air devices? Will TAB be required of any existing equipment or associated air devices to remain?

ANS: Contractor shall be responsible for testing, adjusting, and balancing all new HVAC equipment, including air handlers (9), chillers (1), and pumps (2). This does not apply to existing equipment. Upon further consideration, TAB of individual air devices shall not be required for this project.

3. Q. Confirm if DALT testing of any kind will be required for any new duct work that is used to place back

AHUs? Is DALT required of any existing ductwork?

ANS: DALT shall not be required for this project.

4. Q. Drawings state that the existing concrete pads shall be preserved. Confirm modifications/add-ons to existing mechanical pads as needed will be acceptable?

ANS: Existing concrete pads shall be expanded if necessary to accommodate new equipment.

5. Q. Can the government confirm the amount of nonfunctional dampers per page MD-101A, General Note

#2?

ANS: Please disregard MD-101A, general note 2 wherever it appears in Technical Exhibit B. See question 2.

6. Q. Please confirm that Fan Coil units FC-1, FC-2, FC-3, Chiller CH-3, Air Conditioners AC-025, AC-026, and Unit Heaters UH-1, UH-2 shown on page MD-102A are to remain?

ANS: The listed equipment shall not be demolished for this project.

7. Q. Confirm the HVAC Control Panel CPH-1 is to remain per sheet MD-103?

ANS: M-701, general note 1 is incorrect. While B7050 does contain some pneumatic equipment, all of the existing air handlers are DDC controlled. Contractor shall demolish the existing DDC system and establish a new system as described in M-701 and M-702. The new main control panel (with LonWorks display) shall take the place of CPH-1, with additional panels being located at each AHU as necessary.

Please note that, due to the age of the existing system, DPW will not be able to provide an existing controls database for this building.

8. Q. Per the drawings, there are several units of equipment that are to be removed and nothing placed back. This will leave mechanical pads unused in the mechanical room. Would the government like for these mech pads to be removed?

ANS: All existing concrete pads shall remain, even if they are not reused for new equipment.

9. Q. Will any of the existing piping be required to re-insulate? (e.g. existing piping from new AHUs to wall/floor/ceiling penetration, or set amount of linear feet outside of new AHUs)

ANS: For AHU-1, 2, and 9, all branch piping on the second floor shall be reinsulated. For AHU-3, 4, 6, 7, 8, and 10, only the vertical branch piping between the roof deck and the unit shall be reinsulated.

Assume approximately

10. Q. Drawing Sheet M-201A, note #1 indicates that the existing AHUs 1-9 have existing concrete pads. Observed at the site visit, no concrete pads exist. Instead the AHUs are supports by steel mechanical frames and isolators.

Would the government like new concrete pads for the new AHUs? Or will new fabricated steel frames suffice?

ANS: Contractor shall install all new air handlers on new fabricated steel frames to match existing.

11. Q. Will concrete testing be required for any new concrete placed for mechanical pads? Please specify which tests are required.

ANS: All new concrete pads shall be installed per Technical Exhibit A (23 00 00). No additional tests shall be required.

12. Q. If new concrete pads are required for AHUs 1-9, will the contractor be responsible for engineering to confirm the building is suitable for the added weight of new concrete pads on the 2nd floor mezzanine?

ANS: No new concrete pads shall be installed on the second floor. See question 10.

13. Q. Page M-001, Mechanical General Note #12 states that any new mechanical pads placed for this thickness is to be used?

ANS:

thickness if necessary.

Existing pads shall be expanded at the existing

14.Q. At the site visit we observed 3 CRAC units, AC-3, AC-4, and AC-5 of page MD-202A that are to be removed. The drawings do not show anything being placed back at these locations. Please confirm that these 3 units are to be demo’d and associated piping, etc, to be abondoned in place?

ANS: Confirmed. See MD-202A, note 2.

15. Q. Please provide the manufacture of the existing Exterior Insulated Metal Panels to this building?

ANS: This information is not available.

16. Q. Page MD-102A show existing (assumed to be previously abandoned) Chilled Water Piping that is ceilings, floors, etc. be required? Match Existing?

ANS: Upon further consideration, all condenser-water piping shown in bold on MD-102A shall be abandoned in place and not demolished. All exposed condenser-water piping in room 126 and the mechanical yard shall still be demolished, as shown in MD-103 and MD-104.

17. Q. Will the existing utilities (electrical, gas, water) need any upgrades performed by privatized utilities (Dominion, AMWater) to appropriately accommodate the new equipment?

ANS: No.

18. Q. Can the amps for new Chiller CH-1 be provided? New AHUs 1-9?

ANS: My basis of design for CH-1 is a Daikin AGZ075, which has an MOCP of 175 A. This value may be used for estimating purposes. Please see Technical Exhibit C for the electrical requirements of all existing air handlers. These should provide a reasonable high limit for the power consumption of new units.

19. Q. If the electrical supply to new Chiller CH-1 is larger than the existing Cooling Towers CT-1 & CT-2, it is possible that the underground conduit and wiring will have to be upgraded. Please confirm?

ANS: Underground conduit shall not be expanded. If the new wiring for CH-1 does not fit in the existing conduit for CT-1 and 2, contractor shall install new wiring and conduit aboveground and run it though the exterior wall of room 126.

20. Q. The provided as-builts dated 1980 show there to be removable insulated panels at the East end of the building above the mechanical yard. Are the currently available for use?

ANS: Contractor may remove exterior wall panels from the east side of B7050 as necessary to replace equipment on the second floor. These panels shall be reinstalled or replaced in kind as soon as possible. Afterwards, they shall be sealed and finished to match existing. Existing thermostat and light fixture shall be relocated to an unused panel if necessary. See provided photos.

21. Q. The assumed removable insulated panels also appear to be just above the existing electrical transformers in the mechanical yard. Are the transformers removable provided they are reinstalled after equipment is placed inside the mezzanine?

ANS: Contractor may remove fence panels from the east side of the mechanical yard as necessary to replace equipment. This will allow vehicles and cranes to approach the building directly from an access road. These panels shall be reinstalled or replaced in kind at the end of construction. See provided photos.

22. Q. Could the contractor provide a new permanent or temporary roof access as an option to remove existing equipment and place back new equipment?

ANS: No.

23. Q. Will any duct cleaning of existing ductwork be required?

ANS: No.

24. Q. Will testing of existing Chilled/Hot Water piping to remain be required? Or will testing of new piping isolated from existing be acceptable?

ANS: Contractor is not required to test existing piping.

25. Q. To install new pipe hangers throughout the mechanical rooms, this will require demolition of the existing hard lid gypsum ceilings. Will build back of gypsum ceiling be required?

ANS: Contractor may demolish sections of the existing ceiling in room 126 as necessary to install new pipe hangers.

These sections shall be replaced to match existing.

26.Q. 210 total days, 30 being administrative days, leaves 180 day to complete this SOW. With long lead times, can we please get more time?

ANS: The performance period, as stated in the project synopsis, shall be extended to 240 days.

27. Q. Will temporary heating and/or cooling be required?

ANS: Contractor shall phase work so that the replacement of AHU-9 occurs during September or October. After that, temporary heating shall be provided for the rooms served by AHU-9 until the new unit is operational.

Temporary HVAC shall not be required for any other areas of the building.

28. Q. Will concrete testing be required?

ANS: See previous question.

29. Q. Will density testing be required?

ANS: See question 3.

30. Q. Will commissioning be required?

ANS: Commissioning shall be required for all new HVAC equipment.

31. Q. Will testing and balance be required?

32. Q. Will Dalt testing be required on new or and existing duct?

33. Q. Are there latrines available for use on this project? Or will the contractor be responsible for supplying portable latrines to the on-site workers?

ANS: Contractor shall provide toilets to be used by its employees and subcontracted employees. See Technical Exhibit A (01 35 13, 1.4.5) for more information.

34. Q. What fire alarm system is existing?

ANS: The existing fire alarm control panel is a Honeywell Silent Knight 6820. See provided photos. Also, drawings have been added to Technical Exhibit C to show details of the existing fire protection/suppression system.

35. Q. Can you confirm there will be no housekeeping pads added to the 2nd floor.

ANS: No new concrete pads shall be installed on the second floor.

36. Q. is it recommend to install a roof hatch big enough to crane new HAU’s into upstairs mechanical room room? Would this be acceptable?

ANS: No.

37. Q. Please confirm no fire suppression or alarm is included

ANS: No work for the existing fire protection/suppression system is included in this project, however, contractor shall connect all new duct smoke detectors to this system as noted in M-701.

38. Q. Is Daikin the only acceptable air cooled chiller that Ft Hood DPW will accept?

ANS: Yes.

39. Q. Is R-15 the correct insulation R value on the AHUs as I have not seen an air unit manufacturer like Dalkin, Trane or JCI that makes a 2” foam injected panel that has a R-15 panel insulation rating.

ANS: Note 2 in the air handler schedule is incorrect. It should read Insulation shall be injected R-13 foam or equivalent.

40. Q. Make and Model of Existing Fire alarm Control Panel ANS: See question 9.

41. Q. As-Built Design of Existing Fire Alarm System reflecting locations of any existing Duct Detectors.

ANS: See question 9.

42.Q. Make and Model of Existing Duct Detectors?

ANS: This information is not available.

43. Q. There appears to be no hazmat work or hazmat survey on this project so do we still submit the certification?

ANS: Contractor shall follow Technical Exhibit A and Appendix A for all hazmat requirements.

44. Q. There appears to be no hazmat work or hazmat survey on this project so do we still submit the certification?

ANS: See question 1.

45. Q. Can general note #7 on page M-001 be omitted? How can we quote every item on the drawings

ANS: Please disregard M-001, general note 7.

46. Q. Can HVAC note #8 on page M-001 be omitted? Historically this is never performed on Ft. Hood DPW projects.

ANS: Since there will be no new ductwork installed over occupied spaces, please disregard M-001, HVAC note 8.

47. Q. HVAC note #13 calls for rectangular supply ducts to be internally lined with insulation. Can this be changed to externally insulated due to mold growth in the duct work?

ANS: M-001, HVAC note 13 is incorrect. All new ductwork shall be externally insulated. See Technical Exhibit A for additional insulation requirements.

48. Q. Due to the hazards of utilizing the stairway for demo and build back of equipment can the equipment be removed and replaced through the outside wall instead of using the stairway in room 126P1?

49. Q. Are only items highlighted in bold black color or lines are to be demoed and replaced?

ANS: Whenever a single drawing shows similar items being both demolished and preserved, a bold, black line indicates which items shall be demolished.

50. Q. Page MD-101B note #2 states any device with nonexistent or non- functional balancing dampers shall be provide with new balancing dampers. Can a certain percentage of devices be provided for estimating purposes since we do not know how many this could be?

51. Q. There are many pieces of mechanical equipment throughout the drawings that are highlighted in etc. Do these get demoed or replaced?

ANS: Only items indicated with bold lines shall be demolished. You might need to zoom in on the drawing to see the difference. Also, all equipment to be demolished is explicitly mentioned in the notes. Please submit another RFI if you need clarification on any specific items.

52. Q. Will DPW pick up chiller’s #1 and #2 from the job site once they are removed from the building or will we Be requiured to deliver them to DPW’s destination? A crane or lift will be requiued.

ANS: Upon further consideration, CH-1 and 2 shall be demolished. DPW OMD no longer wishes to reclaim them.

53.. Q. Page MD-102A shows the existing chill water supply lines to be demoed above the ceiling. Do we replace or reuse the ceiling tile and ceiling grid?

ANS: See previous question.

54. Page M-701 shows a blow through AHU picture but the AHU schedule calls for a draw through. Which unit do we use?

ANS: All new air handlers shall be draw-through, as noted in the air handler schedule. Note that all existing units are also draw-through except for AHU-9.

55.. Page M-601 chiller schedule calls for a Daikin product equivalent to an AGZ075. Is this correct or can we use any product that meets the supplied parameters and specifications.

ANS: Fort Hood now requires all new chillers to be Daikin products.

56.. Can general note #7 on page M-001 be omitted? How can we quote every item on the drawings

ANS: See question 3.

57.. Can HVAC note #8 on page M-001 be omitted? Historically this is never performed on Ft. Hood DPW projects.

ANS: See question 4.

58. Q. HVAC note #13 calls for rectangular supply ducts to be internally lined with insulation. Can this be changed to externally insulated due to mold growth in the duct work?

ANS: See question 5.

59. Q. Due to the hazards of utilizing the stairway for demo and build back of equipment can the equipment be removed and replaced through the outside wall instead of using the stairway in room 126P1?

ANS: See question 6.

60. Q. Are only items highlighted in bold black color or lines are to be demoed and replaced?

ANS: See question 7.

61.Q. Page MD-101B note #2 states any device with nonexistent or non- functional balancing dampers shall be provide with new balancing dampers. Can a certain percentage of devices be provided for estimating purposes since we do not know how many this could be?

ANS: See question 8.

62. Q. There are many pieces of mechanical equipment throughout the drawings that are highlighted in etc. Do these get demoed or replaced?

ANS: See question 9.

63. Q will DPW pick up chiller’s #1 and #2 from the job site once they are removed from the building or will we be required to deliver them to DPW’s destination? A crane or lift will be required.

ANS: See question 10.

64. Q. Page MD-102A shows the existing chill water supply lines to be demoed above the ceiling. Do we replace or reuse the ceiling tile and ceiling grid?

ANS: See question 11.

65. Q. Page M-701 shows a blow through AHU picture but the AHU schedule calls for a draw through. Which unit do we use?

ANS: See question 12.

66. Q. Page M-601 chiller schedule calls for a Daikin product equivalent to an AGZ075. Is this correct or can we use any product that meets the supplied parameters and specifications.

ANS: See question 13.

SECTION 00100 - BIDDING SCHEDULE/INSTRUCTIONS TO BIDDERS

The following have been added by full text:

52.252-3 ALTERATIONS IN SOLICITATION (APR 1984)

Portions of this solicitation are altered as follows:

Amendment 01- Repsonse to questions from industry, attach copy of Sign-in Roster from 12 Apr Site visit.

(End of Provision)

SECTION 00700 - CONTRACT CLAUSES

The following have been modified:

52.252-4 ALTERATIONS IN CONTRACT (APR 1984)

Portions of this contract are altered as follows:

None

(End of clause)

(End of Summary of Changes)