Amendment 3 12805B24R0012.pdf

(x)

12805B24R0012 x x

1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT 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 letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

ARS-12805B

FORT COLLINS CO 80526

BLDG D, SUITE 300

2150 CENTRE AVENUE

USDA ARS PA AAO ACQ/PER PROP

05/17/20240003

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers 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

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

03/18/2024

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

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

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

ORDER NO. IN ITEM 10A.

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

Industry Questions Included.

Please acknowledge on SF1442 or including signed SF30 in proposal package.

LIST OF CHANGES:

Bids due date : 29-May-24 changed to 04-June-24

Please review Industry Questions and Answers, attached.

Please review list of Amendment 3 - Attachments, uploaded.

Continued ...

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

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

JOSEPH A. COVARRUBIO

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

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

ITEM NO. SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

NAME OF OFFEROR OR CONTRACTOR

2 2

CONTINUATION SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGE OF

(A) (B) (C) (D) (E) (F)

12805B24R0012/0003

Amendment 3 Attachment 1 Maximum Workweek Clauses

Update.

Amendment 3 Attachment 2 Specifications 01 01 00 rev 1.

Amendment 3 Attachment 3 TX CNRC ACM LBP Survey.

Amendment 3 Attachment 4 2923-E CNRC ARCH

Drawings 2024.04.04-Rev 1.

Amendment 3 Attachment 5 Plumbing Revisions.

Amendment 3 Attachment 5a Specifications 22 00 00

- Copy.

Amendment 3 Attachment 6 Specifications 11 41 11.

Amendment 3 Attachment 7 Existing Control Points.

Amendment 3 Attachment 8 Drawings SPF Application.

NSN 7540-01-152-8067 OPTIONAL FORM 336 (4-86)

Sponsored by GSA

FAR (48 CFR) 53.110

Amendment 3 Houston Critical Upgrades

1. Ahu 3 & 4 drawing MD106 Note 2 and M106 note 2.

Existing Chilled water valves are electronic and hot water valves are pneumatic. Are both chilled and hot water valves to be replaced or just the hot water pneumatic valve?

Answer: Only the pneumatic heating hot water valve is intended to be replaced.

2. Drawing M601 Stair well pressurization fan is currently started via fire panel. BAS points list indicates to move it to BAS control point. Please clarify if it should stay on fire panel control.

Answer: Clarification, the stair way pressurization must remain on the fire alarm panel. The fan must also interface with the BAS with pressure sensor input, status and control output (4- 20ma). Change to 0-10VDC for VSD.

3. There is no visible way to modulate stair well vane pitch via electronic actuator. Would it be more energy efficient to use a VFD drive and lock fan vanes in place?

Answer: The intention is to modify the existing fans to fix the pitch and be provided with an adjustable speed drive. Refer to specification 23 09 13, part 1.1 d.

4. Drawing M601 Steam converter points. Points list identify [3] steam valves commands and [3] steam valve position status. After review of steam converter there are [9] valves in total [6] 1/3 2/3 steam valves and [3] hot water isolation valves. Should we include all [9] valves in the conversion?

Answer: Yes, all nine (9) valves will be converted from pneumatic to electronic.

5. Is there any afterhours requirement for this project?

Answer: Limit work in the existing building to normal business working hours of 7 a.m. to 4 p.m., Monday through Friday, unless otherwise indicated.

Insulation repairs indicated on architectural drawings and storm drain piping replacement indicated on plumbing drawings must be completed Sunday night through Friday morning - 6 PM to 7 AM local time.

Maximum Workweek – Construction Schedule has been updated, attached, and dictates the process for requesting work outside of those hours. Amendment 3 Attachment 1 Maximum Workweek Update Specification section 01 01 00 1.6 C. Security Procedures has been updated. See Amendment 3 Attachment 2 Specifications 01 01 00 rev 1.

6. Is there a parking fee for contractors?

Answer: Refer to specification 01 01 00, 1.6 paragraph F for Motor vehicle restrictions.

7. Please provide pipeline sizes for stream converter 1/3 , 2/3 valves and hot water isolation valve.

Answer: Converter 1/3 (6” diameter), Converter 2/3 (8” diameter), hot water (8” diameter).

8. After further investigation adding electric actuator to existing stairwell pressurization fans is not possible, recommend either replacement of fans or adding VFD drive. Please provide new direction?

Answer: The intention is to lock the fan vanes and provide with an adjustable speed drive. Refer to specification 23 09 13, part 1.1 d.

9. Please provide building elevation and building section drawings.

Answer: As-Built Drawings are accessible through this link to BOX.

https://ars-usda.box.com/s/dfvwcrxbl6z1syh714xjv91f48ay1h05

10. Please provide structural drawings. As-Built Drawings are accessible through link above to BOX.

11. Please provide the R Value and thickness of the existing insulation. The existing spray applied insulation at the underside of floor decks is of an unknown type and thickness with an indicated R-value of 10 in the original construction documents. The existing fiberglass insulation in the wall cavities above the ceilings is 3.5 inches in thickness (R-15 +/-).

12805B24R0012, CNRC Critical Upgrades to Insulation, Piping & HVAC - Houston, TX - Amendment 3 Offerors must Acknowledge this Amendment (3) in Block 19 on the SF 1442 in their proposal or submit a signed copy of the Amendment 3 SF 30. Date and time for offers is extended to June 4, 2024 by 2:30 PM CST.

Industry Questions with Answers:

05/17/24 https://ars-usda.box.com/s/dfvwcrxbl6z1syh714xjv91f48ay1h05

12. Will we have access to a freight elevator? There is a service elevator extending from Basement Level 3 through the 11th Floor. Conditions of use will be per the Government’s approval.

13. Please confirm if the building will be occupied during construction. If so, are there any phasing requirements? The building will be occupied during construction. Phase work to only perform work on 1-floor at a time.

14. What R-Value does the government intend to achieve with the specified 4" closed cell spray foam. The minimum initial R-value shall be 28 and the minimum aged R-value shall be 26.4 per the prescriptive R-values per inch of material provided in Section 07 27 36.

15. Please confirm that the door within the curtain wall assembly in detail 2|A1307 is the only door to be installed on this project. This is correct.

16. Please provide a detail showing wall type and thickness or a shop drawing on the coolers and freezers that are specified as "match existing". Refer to Specification 11 41 11 for wall thickness and types.

17. The equipment schedule on E-600 has "?" in the existing circuit column and a TBD in the OPD column for devices that need to be replaced or circuits that need to be extended. Please provide the above information. Contractor to field verify TBD circuits. Documentation of TBD circuits was not available.

18. Please provide the intended temperature range (+/-) for the new freezers or coolers. Cooler 1095 and Cold Room 11006 will operate between 35°F and 50°F. Freezer 1095A and 11008 will operate between 0°F and 30°F.

19. Please confirm if all new freezers and coolers require controls and monitoring. Unit controllers will be mounted on the face of the unit. The controller will have monitoring capability. The units will not need to be monitored by the building automation system. Existing BAS temperature sensors should be re-used. On/Off controls should be local, not by BAS.

20. Please confirm that one person can "triple hat" as the Superintendent, SSHO, and QC Manager.

Yes.

21. Can the period of performance be extended after award once the material/equipment lead times are confirmed due to current market conditions for the equipment for this project? The period of performance was established based on estimated delivery times and market conditions and intends to administer the contract in accordance with that requirement but also subject to the allowable delays listed in Federal Acquisition Regulation 52.249-10.

22. Is this project tax exempt?

Answer: YES

23. What is the projected start date for this project?

Answer: We are looking to have this awarded sometime in July 2024.

24. What is the projected completion date for this project?

Answer: 270 Days after Notice to Proceed.

25. Will ARS require any bonds from subs?

Answer: It is the Prime Contractor’s responsibility to provide bonds per solicitation requirements. The USDA / ARS contract is with the Prime.

26. Please confirm the working hours for scope is from 4pm - 6am Mon-Fri.

Answer: See question # 5.

27. What are the workable hours for the weekend?

Answer: See question # 5.

28. What are the badging requirements for workers to access the site?

Answer: Refer to Specification 01 01 00 part 1.6 B. Contractor must provide valid US or State identification to acquire badge. One badge will be given to a crew leader for groups of 2-3.

Badge must be worn so as to be clearly visible at all times while working within the facility.

Badges and keys will be checked in and out daily. Contractors must wear company identification. Badges are not required for work outside of the building. Contractors must wear company identification while working outside.

29. Are there any special insurance requirements we need to be aware of?

Answer: All insurance requirements are in the solicitation.

30. Is there any liquidated damages for the project?

Answer: No.

31. Who perform the demo work of plastered ceilings?

Answer: Work to be performed per the solicitation.

32. Who will provide dumpsters onsite for trash removal?

Answer: Prime contractor must provide dumpsters on site for trash removal.

33. Will there be any area in the parking garage to be used for laydown & materials storage?

Answer: See Question # 42.

34. Is there onsite parking available for the workers?

Answer: Refer to specification 01 01 00 for parking restrictions. Parking at CNRC is limited. CNRC can offer one parking spot per company including one for the general contractor, if any.

Companies with multiple employees on site must carpool. Garage access cards are not available. Dock parking is limited; first come, first served and subject to towing if abused.

Reservations for initial site visit is preferred. Contractor must be on site to receive all deliveries.

35. Can the ceiling tiles be reused or do they need to be replaced after they are removed?

Answer: If all ceiling tiles throughout a space must be removed to accomplish the work, new ceiling tiles shall be installed. If only a portion of the existing ceiling tiles must be removed, the existing tiles may be reinstalled to maintain a cohesive appearance for coloration, provided they are NOT damaged during construction.

36. If we work nights Monday - Friday does the scope we start each night have to be 100% complete and ready to turn over to the building occupant the next morning? Some areas seem too large for this to be possible.

Answer: No, work may stop to be resumed the next night. The contractor must clean the work area after each shift.

37. Can some of the building occupants be relocated as needed for the SPF scope of work?

Answer: No.

38. Is this a federal property or a leased space from the federal government? The SOW mentions permits, but if it is a federal building, permits may not apply.

Answer: Property is Federally owned. Federal Law (see 116 STAT. 1166 PUBLIC LAW 107- 217—AUG. 21, 2002) does not allow the Federal Government or Contractor to pay a fee for permits, except for environmental permits. Contractor is responsible for performing due diligence to obtain the necessary permits working within this limitation. Contractor to notify CO and COR if permits cannot be obtained within these limitations.

39. Will the USDA provide a tax exemption certificate for this project?

Answer: Yes, after contract award.

40. Regarding Supervision, Quality Control, and Site Safety and Health Officer, will the USDA require a separate standalone person for each role? Require only a Superintendent to fill all roles? Or require a Superintendent and a person filling both QC/SSHO roles?

Answer: One person may fill multiple roles.

41. Specification section 01-01-00 General Requirements subsection 1.5 Safety Submittals item C states that Contractor to provide continuous noise monitoring and at no time shall noise exposure to any ARS staff exceed 75 dB and that a written report shall be generated weekly of all noise testing results. Will the USDA clarify if the contractor can strike this requirement as many construction tasks will exceed the 75 dB level. Please confirm.

Answer: The contractor may disregard this requirement. The intent is to minimize noise to the extent possible.

42. How many parking spaces is the contractor allotted for management, supervision and field personnel?

Answer: Refer to specification 01 01 00 for parking restrictions. Parking at CNRC is limited.

CNRC can offer one parking spot per company including one for the general contractor, if any.

Companies with multiple employees on site must carpool. Garage access cards are not available. Dock parking is limited; first come, first served and subject to towing if abused.

Reservations for initial site visit is preferred. Contractor must be on site to receive all deliveries.

43. Please confirm if the contractor is responsible for providing a project field office? Or will the contractor be allowed space within the building for the Superintendent to conduct onsite meetings and write their daily reports?

Answer: The contractor may use a space within the building for onsite meetings and office work.

44. Where is the materials lay down area designated for this project?

Answer: CUP B2. MP B3. Within the confined area (6 parking spaces) at the freight elevator landing.

45. Is work to take place during normal business hours?

Answer: See Question # 5.

46. Is USDA amenable to extending the period of performance in the event of significant lead times for equipment?

Answer: The period of performance was established based on estimated delivery times and market conditions and intends to administer the contract in accordance with that requirement but also subject to the allowable delays listed in Federal Acquisition Regulation 52.249-10.

47. Has an asbestos or hazardous material survey been conducted on this building? If so, please provide. If not, is contractor to assume no hazardous material survey or abatement is in scope?

Answer: A Hazmat survey has been conducted on the insulation on the bottom of the floor slabs. See Amendment 3 Attachment 3 TX CNRC ACM LBP Survey.

48. Is the use of Microsoft Project acceptable for developing schedules?

Answer: Yes, Microsoft project is acceptable.

49. Regarding the CLIN structure, how long after award of the base can the government award a follow on alternate/option CLIN? Just wanted to confirm because the price schedule states contractor to hold pricing for Base bid and alternates for a period of 60 days. Therefore, contractor assumes if funding is available the alternates will be awarded at time of base award and not at a later point in time. Please confirm.

Answer: Alternates will be awarded at the time of base award and not at a later date.

50. Regarding project phasing, is contractor required to complete work on each individual floor before they can move on to the next floor?

Answer: This is correct.

51. Regarding the replacement of cold room/freezer unit coolers or the full replacement of existing coolers, does the USDA have a phasing plan in mind for clearing out coolers/freezers for this work to take place? How many coolers/freezers will be available at a time for contractors to either replace the unit coolers or install a completely new system?

Answer: Two at a time on lab floors (5-10), one at a time in the MRU kitchen (3rd floor) and one at a time on the 1st floor. We currently have one out of service in the MRU kitchen and 3 out of service on the lab floors that should be worked on first.

52. The scope of work mentions replacing select pneumatic controls with DDC, however, it appears controls drawings were not provided in the project documentation. Please provide the controls drawings for this building.

Answer: Refer to as-built drawings per Question #9 and Amendment 3 Attachment 7 Existing Control Points.

53. In many of the architectural drawings there was an insulation notes, legend and insulation details provided. However, the floor plans do not depict the shading and lines as noted in the legend itself. There are areas on the plans where gray shading is apparent, but it is unknown if this is to signify removing and applying new insulation or removing and installing a new ceiling system. The contractor believes the lines were not applied to the drawings with the shading to notate what is desired. Otherwise, it just appears insulation is being applied to exterior walls only based on the solid black line notation. Please provide revised drawings depicting the gray shading and/or slanted lines/hashed lines. See example below from Sheet A1306. The same applies to other areas on this sheet and other sheets that have an exterior terrace or rooftop above them.

Answer: The architectural sheets have been reissued to correct the visual representation of the legends versus the drawings. These should address the concerns expressed here. See Amendment 3 Attachment 4 2923-E CRNC ARCH DRAWINGS

2024.04.04-REV1.

54. Further, referencing the same legend in question 53, please confirm all areas with ceiling removal are to be replaced with drywall and NOT replaced back with the same materials as they were originally (i.e. acoustical ceiling, stucco, etc.). The legend description states “remove existing and install new drywall ceiling…”.Will the new drywall ceiling types affect any existing lights?

Answer: The architectural sheets have been reissued to correct the visual representation of the legends versus the drawings. These should address the concerns expressed here. The intent is for the ceiling materials to be replaced “in-kind” to match the type of ceilings currently installed. See Amendment 3 Attachment 8 Drawings SPF Application.

55. Is the contractor to expect to remove fireproofing in all areas that are to receive new 4” foam insulation? Has the fireproofing been tested for asbestos or is the contractor to assume it is asbestos free?

Answer: The existing fireproofing is not intended to be removed – only the existing insulation. Any damage occurring to the existing fireproofing must be repaired to maintain the current level of protection for the structure. ACM report will be provided in future amendment. See Amendment 3 Attachment 3 TX CNRC ACM LBP Survey.

56. Can contractor re-use existing pipe hangers/supports?

Answer: Existing pipe hangers/supports must be removed and replaced.

57. Please confirm all storm drain PVC piping requires insulation. We are asking because it was noted on site that some existing PVC storm drain piping was not wrapped in insulation.

Answer: Correct, all new storm drain piping shall be provided with insulation.

58. PVC Piping for Internal Storm Drain Piping: Local mechanical contractors have suggested that fire codes in Houston, TX may not permit the use of PVC piping for internal stormwater conveyance piping within buildings. We assume the intent of insulating the new storm drain pipe is to ensure compliance with fire safety standards. Please confirm this to be the case. Also, Table 2 of Section 23 07 00 is the only call out we could find regarding the type of insulation for storm drain piping. Please confirm the specified insulation for storm drain piping, as listed in Table 2, will meet local fire safety standards for flame spread, smoke developed index ratings, etc.?

Answer: Disregard PVC piping requirements on drawings. Drawings have been revised to reflect hubless cast iron for Storm drain piping. Provide insulation with a maximum flame spread index of 25 and a maximum smoke developed index of 50. See Amendment 3 Attachment 5 Plumbing Revisions and Amendment 3 Attachment 5a Specifications 22 00 00.

59. There are some floors not depicting any storm drain removal (i.e., floors 5,6,7,8 and 9), which makes since if there is not any horizontal piping on said floor, however, we are confident the missing floors still have the 8” vertical riser going through them to convey storm water from upper floors to the lower floors. Is contractor to assume to leave the existing risers in place? Or are these to be removed and replaced along with all the other storm drain piping?

Answer: The risers passing through the floors not shown are to be removed and replaced. Refer to the building storm drain riser on sheet P-601.

60. Please confirm who is responsible for removal of existing items such as fixtures, furniture, etc., to access work areas? If contractor, where can they be stored onsite? Or will a storage container be required.

Answer: The location facilities group has two or three open positions, is understaffed and cannot be counted on to assist. We will coordinate between the contractor and the occupants.

61. Is contractor allowed use of the elevators?

Answer: There is a service elevator extending from Basement Level 3 through the 11th Floor. Conditions of use will be per the Government’s approval.

62. Is contractor allowed use of onsite restrooms or are we to provide temporary restrooms?

Answer: Contractors may use onsite restrooms.

63. Is contractor required to replace fireproofing on structural deck and columns if material is disturbed for hangers, supports, etc.? It was noted on site, there were some areas where fireproofing was scraped away and not replaced after.

Answer: Yes, any damage occurring to the existing fireproofing must be repaired to maintain the current level of protection for the structure.

64. Is contractor to assume all pipe sizing notated on the plans is correct or as described?

Desire clarification because there were a few areas where there was a discrepancy between what was depicted on plans versus what is actually is installed.

Answer: Pipe sizes shown are based on field observations and as-built drawings. Actual pipe sizes must be field verified.

65. Section 13 21 26 (Cold Storage): More information needs to be provided. The section provides basic information, but contractor needs to know R-value of walls and/or any other specific storage room specifications. There was not a stated temperature setpoint (+/- degrees) or any humidity requirements. What level of controls are required for the new rooms and are there any conditions recording devices (i.e. data loggers) required for the new rooms as well?

Answer: Specification section 11 41 11 has been added for clarity. Cooler 1095 and Cold Room 11006 will operate between 35°F and 50°F. Freezer 1095A and 11008 will operate between 0°F and 30°F. See Amendment 3 Attachment 6 Specifications 11 41 11.

66. Section 13 21 26 (Cold Storage): The construction documents indicate replacement of FCU & ACCU of the cold storage units and reconnection of existing electrical circuit. Are we to assume reconnection of existing controls and datalogging devices, and are the existing devices operational and accurate without alteration or replacement?

Answer: Controllers and datalogging devices must be removed and replaced.

67. AHU 3 & 4 drawing MD106 Note 2 and M106 Note 2: Existing Chilled water valves are electronic and hot water valves are pneumatic. Are both chilled and hot water valves to be replaced or just the hot water pneumatic valve?

Answer: Only the pneumatic heating hot water valve is intended to be replaced.

68. Drawing M601: Stair well pressurization fan is currently started via fire panel. BAS points list indicates to move it to BAS control point. Please clarify if it should stay on fire panel control or be moved to BAS.

Answer: Clarification, the stair way pressurization must remain on the fire alarm panel. The fan must also interface with the BAS BAS with pressure sensor input, status and control output (4-20ma). Change to 0-10VDC for VSD.

69. According to USDA’s incumbent controls contractor, Schneider Electric, there is no visible way to modulate stair well vane pitch via electronic actuator. Would it be more energy efficient to use a VFD drive and lock fan vanes in place?

Answer: The intention is to modify the existing fans to fix the pitch and be provided with an adjustable speed drive. Refer to specification 23 09 13, part 1.1 d.

70. Drawing M601 Steam converter points: Points list identify three [3] steam valves commands and three [3] steam valve position status. After review of steam converter, there are nine [9] valves in total – six [6] 1/3 and 2/3 steam valves and [3] hot water isolation valves. Should we include all nine [9] valves in the conversion?

Answer: Yes, all nine (9) valves will be converted from pneumatic to electronic

71. Please provide pipeline sizes for stream converter 1/3 and 2/3 valves and hot water isolation valve.

Answer: Converter 1/3 (6” diameter), Converter 2/3 (8” diameter), hot water (8” diameter).

72. After further investigation by USDA’s incumbent controls contractor, adding electric actuator to existing stairwell pressurization fans is not possible. Schneider Electric recommends either replacement of the fans or adding a VFD drive. Please advise accordingly.

Answer: The intention is to modify the existing fans to fix the pitch and be provided with an adjustable speed drive. Refer to specification 23 09 13, part 1.1 d.

73. Pending the response to Question #72, if the stairwell pressurization fans are to be retrofitted with new VFDs, please provide a schedule, installation locations, and specification for the VFDs. Also please show the power to the VFDs and from the VFDs to the fans on the electrical drawings.

Answer: Intercept existing feeder and reroute to VFD. Provide new conductors and conduit to fans on each floor.

74. Please indicate the 120v power required for DDC on the drawings. Schneider Electric has indicated that 120v power will be necessary for the stairwell pressurization controllers.

Answer: There are new panelboards with existing spares in electrical rooms on select floors.

75. Is there a SPF-1 that needs to be retrofitted to DDC? The mechanical drawings show SPF-2, 3, 4, 5, and 6.

Answer: SPF-1 is indicated on sheet M-104

76. Electrical Schedule E-600 ACUU & FCU, Note 2 states “reconnect new equipment to existing circuit.” As such, why does Schedule E-600 include a “new circuit” column with callouts for some and TBD for others? Please clarify.

Answer: Contractor to field verify TBD circuits. Documentation of TBD circuits was not available.

77. Electrical Schedule E-600 ACUU & FCU, Note 6 states “Disconnect equipment and demolish conductors and conduit back to panel.” However, contractors were not afforded access during site visit to determine the distance, designation, or location of the associated distribution panels. Please provide Panel Schedules and Power Distribution One Lines.

Answer: Requested information is not available. Assume existing power is supplied from electrical room on associated floor with equipment.

78. Section 26 20 00 (Interior Distribution System): E600 schedule lists three Transfer Switches (Model ZTS81EC-7AAAAAELLPTUW) and one assumed to be Gen Engine gear (Model ZTS22EX-5AAAEHMST0). The E500 reflects a similar setup. However, drawings E107 and E115 only denotes two Automatic Transfer Switch locations (ATS 2&3) (ATS 1&3) depicted on E-103 as shaded. Does the SOW encompass work on all three ATS units and the Gen Engine ATS gear, or are there exclusions within this scope?

Answer: Replace four (4) switches. Locations are E-103 room B1012, E-103 room B1006, E-107 room 4002, E-115 room 12004.

79. BID OPTION 001 requires the contractor to provide new controls and integration for an existing transfer switch. Please provide commissioning and acceptance testing documentation from the original installation so contractors can understand the original design intent, what functionality was accepted, and sequence of operations. Also, is the intent to eliminate the existing relay logic control scheme and replace with modern digital controller?

Answer: Requested information is not available. The intent is to replace the existing relay logic with new digital controls. The equipment does operate as the manufacturer intended. ARS expectation is retrofit control hardware should function the same.

80. E107 note 1, BID OPTION 001: “Provide new controls and integration for existing transfer switch.” We request clarification on the extent of “controls” and “integration” as mentioned. Does this mean changing the controls only, or are we to replace the ATS itself? Is the requested controls and integration purely relay logic, or SCADA, or some combination of the two? A detailed SOW is essential for us to formulate accurate pricing.

Answer: Transfer device to remain. Transfer controls to be replaced. Intent is to reduce/eliminate outage requirement for downstream equipment.

81. ATS Integration: Based on contract documents and dialogue with Schneider Electric, integration with the BAS is limited to providing a dry-contact for the status of each ATS.

Does this level of integration satisfy the project's requirements? If not, what specific integration measures are required.

Answer: This is correct.