Attachment 2 - Pre-bid RFI Response.xlsx
XLSX spreadsheet 37 KB Posted
- Solicitation number
- 36C24725R0046
About this file
This is a pre-bid Request for Information (RFI) response document for the VA Atlanta Inpatient Pharmacy IV Compounding Room project (Project #508-21-107). The document contains 36 questions and answers primarily focused on technical specifications, equipment requirements, and project execution details.
Key clarifications include: no existing roof warranty exists; the steam generator is a Carel HeaterSteam Model UR040HM1U4; crane lifts must be performed after normal business hours; Trane Controls is the preselected controls service company; the control system must be contracted directly through the General Contractor rather than the Mechanical Contractor; working hours are 7:00am to 4:30pm Monday-Friday; and contractors require background investigations, fingerprinting, and badging. Technical specifications were provided for air handling units, fan filter units, HVAC systems, and various mechanical components. The document also addresses requirements for the Site Safety and Health Officer (SSHO), Quality Control, and project supervision roles.
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Pre-Bid RFI's
| Project Name: | VA Atlanta - Inpatient Pharmacy IV Compounding Room |
| VA Project Number: | 508-21-107 |
| ACG Project Number: | 20-384 |
| Pre-Bid RFI | |||
| REQUIRED | |||
| Item | |||
| # | RFI's | Response | |
| 1 | Please provide existing roof warranty and who is holding it? | There is no existing warranty on the roof. | |
| 2 | During the site visit we were unable to access the any rooms/areas beyond 3’ into the room labeled GC331A (RED LINE ON FLOOR). No access to GC 331E, B, or C rooms. Please confirm that all items to be demolished or altered in these rooms/areas clearly depicted on the drawings. | Items to be demolished should be reflectetd in drawings. Please provide clarity on which items needing confirmation. | |
| 3 | In the demolition “Key Notes” on drawing AD101 note #9 states to remove and relocate the existing steam generator. We were unable to access that area during the walk through. Please provide the manufacturers information and requirements for the steam generator and or any other existing equipment in the project. | Steam generator is Carel HeaterSteam Model UR040HM1U4. | |
| 4 | During the walk-through we were unable to access the interstitial areas above the ceilings. Are all obstructions to installing the new piping and or ductwork within the interstitial space clearly identified in the drawings? If all items are not able to be identified in drawings, contractor requests a second site walk to gain access to the interstitial space. | Ceiling space is filled with duct and conduit mainly serving this space. Removing the ceilings for full renovation will allow access for coordination. It is anticpated that design drawings provide are constructable. | |
| 5 | Can Superintendent, QC, and SSHO Be covered by the same person? | Refer to Project Specifications, Section 01 35 26 Safety Requirements, 1.7 "Site Safety and Health Officer (SSHO) and Competent Person (CP). | |
| 6 | Can previously submitted PPQ’s be submitted in lieu of new PPQ’s specifically for this project? | Submit PPQ's for relevant projects within the last three years. In addition, submit CPARS. While the Government may elect to consider data obtained from other sources, the burden of |
providing current, accurate and complete Past Performance information rests with the Offeror.
| 7 | TAB B Past Performance – Please clarify if CPARS are acceptable in lieu of PPQ’s. | Refer to Item # 6 |
| 8 | Specifications section 23 73 00, Indoor Central-Station Air-Handling Units, part 1.4 submittals, paragraph D refers to factory testing. Please provide factory testing requirements of the air handler to include the number and description of the test points if applicable. | Testing performance related to AHRI, ASHRAE, and AMCA standards as referenced in Setion 1.3 of the same specifcation. |
| 9 | Specifications section 23 07 11 HVAC & Boiler Plant Insulation, part 3.8 Pipe Insulation Schedule does not contain HWH (heating water supply) and HWHR (heating water return) piping insulation requirements. Please provide insulation requirements for HWH and HWHR piping. | HWH and HWHR piping shall be the same as LPR piping. Revised spec provided in addendum for clarity. |
| 10 | Specifications section 23 09 23 Direct Digital Control System for HVAC, part 1.1 paragraph G, in part states: |
“This campus has standardized on an existing standard ASHRAE Standard 135, BACnet/IP Control System supported by a preselected controls service company. This entity is referred to as the “Control System Integrator” in this Section of the technical specifications.”
Subsequently sub-paragraph G1states:
“The General Contractor of this project shall directly hire the Control System Integrator in a contract separate from the contract procuring the controls contractor administered by this Section of the technical specifications.”
| Please clarify if the above specifications preclude the Mechanical Contractor from hiring the preselected controls service company? | The controls contract shall be directly through the General Contractor, not the Mechanical Contractor. | ||
| 11 | Please provide the name and contact information of the preselected controls service company providing services at the Atlanta VA Health Care System? | Trane Controls | |
| 12 | The Contract Documents state the existing air handler and chiller located on the roof are to be turned over to the Government upon removal. Please clarify if the Government will have transportation equipment on site the day the equipment is removed to move the said equipment to its designated storage site? | Will be investigated further on transportation to a designated storage site. | |
| 13 | Sheet M 101, Ground Floor Piping Plan indicates tapping two existing 1 1/4-inch heating water lines above the corridor ceiling. Existing isolation valves are not indicated on the drawing for the lines to be tapped. On the site visit of 1/27/2025 access to the ceiling area was not accomplished due to time constraints. |
Please provide zone isolation valve details for this section of heating water piping.
| Please clarify if a heating plant shutdown will be required. | A heating plant shutdown should not be required. This will be coordinated with the VA. | ||
| 14 | Sheet MD 101, Ground Floor Mechanical Demolition Plan Key Note 5 calls for the removal of the existing steam humidifier for reinstallation in the roof penthouse. | ||
| Please provide the manufacturer’s submittal for this humidifier | Steam generator is Carel HeaterSteam Model UR040HM1U4. | ||
| 15 | A crane is required to remove and set equipment on the roof. Please clarify if the Government require the lift to be performed after normal business hours? | Crane lift is to be performed after normal business hours unless otherwise agreed upon by Safety and COR. | |
| 16 | Please provide the lift plan form utilized at the Atlanta VA Health Care System site. | Refer to Refer to Project Specifications, Section 01 35 26 Safety Requirements, 1.8 Cranes | |
| 17 | Sheet M 103 Detail 4, Enlarged Mechanical Penthouse Plan Key Note 9 calls for installing the chilled water pumps on a skid. Sheet M 501, Detail 13 indicates the pump is suspended from above. | Pumps to be provided on skid per Key Note 9 on M-103. Contractor can support from below or frame skid to hang pumps as shown in 13/M-501. | |
| 18 | Please provide clarification on the penthouse chilled water pump mounting requirements. | Pumps to be provided on skid per Key Note 9 on M-103 and located on bar grating penthouse floor. Provide skid with vibration isolation. | |
| 19 | Sheet M 103, Key Note 1 states in part: |
“Provide new remote modular condenser, RMC-1, route condenser water piping into penthouse and connect to new modular chiller, CH-1.”
Sheet M 103, Detail 1 Roof Mechanical Plan and Detail 4 Enlarged Mechanical Penthouse Plan indicate piping between RMC-1 and MCH-1 and is labeled L/S.
Sheet M 001, Mechanical Legend defines piping nomenclature RLS as refrigerant line set (liquid and suction).
Sheet M 103 Key Note 1 and M 103 drawing details are in conflict.
Please clarify the cooling medium of RMC-1. Is it air or water cooled?
If RMC-1 is air cooled, does it have a single refrigeration circuit or dual refrigeration circuits?
| Please provide the sizes of the liquid and suction piping? | Air-cooled with dual circuits and remote condenser. Liquid and suction lines to be sized per manufacturer's recommendations for capacity of equipment scheduled. | |
| 20 | Is the General Contractor responsible for hiring and supervising the following: | |
| a. | HVAC Commissioning Agent? | |
| b. | HVAC Test and Balance Company? | a. No. According to spec 01 91 00 - 1.9.A, the CxA will be contracted by the VA. The GC is to have a Commissioniing Manager to work with the CxA. |
b. Yes. Refer to spec 23 05 93 - 1.3.B.1 for TAB Agency Qualifications.
| 21 | Please provide previously performed Test and Balance Reports. | Test and Balance report attached as of 6/1/2024 | |
| 22 | Please provide the name and contact information of the Water Treatment Contractor providing water treatment services at the Atlanta VA Health Care System? | Phigenics | |
| 23 | 23 05 11 – Common work results for HVAC | ||
| 1) | Specification -2.8 Variable Speed Motor Controllers does not indicate bypass, disconnects, standard warranty, harmonic mitigation, or brand. | ||
| a. | Please clarify if VFDs serving pumps and fans require bypass or redundancy? AHU specification 2.1H.3 indicates bypass is unacceptable and that a “backup drive” is required. | ||
| b. | Please clarify if VFDs should come from factory with a means of disconnect? | ||
| c. | VFDs shown on enlarged mechanical penthouse plan on sheet M-103 are not labeled. Please clarify if all VFDs should include a NEMA 1 enclosure? | ||
| d. | Please clarify if a standard 2 year warranty acceptable or should an extended warranty be provided? | ||
| e. | Please provide VA preferred brand in the building? Is Yaskawa acceptable? | 1 - Motor Controllers are specified in section 26 29 11. |
a - Spec identifies bypass.
b - Spec identifies disconnect means.
c - VFDs are intended to be installed inside the conditioned penthouse. Provide enclosures accordingly.
d - Warranties are to be provided per FAR clause 52.246-21 if not noted otherwise in specifications.
e - Yaskawa meets the performance requirements in spec 26 29 11 Motor Controllers.
| 24 | 23 73 00 – Central Station Indoor AHUs | |
| 1) | Please clarify if the AHUs should have UV racks? If yes, should they be intense enough to clean the coil or to kill pathogens on the fly? | |
| 2) | Will the mechanical penthouse be built around the new AHU? Or should the AHU be furnished in modular sections sized to fit through a door or wall opening? | |
| 3) | Please clarify and confirm filtration requirements for PF, AF, and FF-56 | |
| 4) | Specification 2.1H.3 reads “The plenum fans shall be driven by variable speed drives with at least one back-up drive as shown in the design documents. Use of a drive with bypass is not permitted. | |
| a. | Question: AHU schedule on sheet M-601 does not indicate VFD. AHU-56 schematic on sheet M-504 indicates VFD. Please define intent of “back-up drive” as noted in specification. Specifically, should Redundant VFDs be furnished in a common panel, or should two VFDs be mounted adjacent on wall, each sized to serve 100% of AHU airflow? | |
| b. | Specification -2.8 Variable Speed Motor Controllers does not indicate bypass, disconnects, standard warranty, harmonic mitigation, or brand. | |
| 5) | Specification 2.1H.4 mentions redundancy. Fan schedule on sheet M-601 indicates a 2x1 array for SF-56 | |
| a. | Question: Please clarify if supply fans in AHU should be sized for N+1 redundancy, such that in the event of a single motor failure the remaining fan(s) can satisfy 100% of design airflow? | |
| 6) | Specification 2.1H.5a reads “Provide an actuator-controlled damper to isolate the fan not in operation due to failure.” | |
| a. | Question: Please clarify if backdraft dampers are acceptable in lieu of motor operated dampers? | |
| b. | If not, and motorized dampers must be provided, please confirm if actuators are in mechanical or controls contractor scope to furnish / wire and confirm voltage. | |
| 7) | Specification 2.1H.5b indicates airflow measuring devices should be integral to fans. AHU-56 control schematic on sheet M-504 shows the airflow measuring device separate from the fan. | |
| a. | Question, are airflow measuring devices in mechanical or controls contractor scope? | |
| b. | Is it acceptable to furnish fans with a pressure tap to accept airflow measuring by others, or should the AHU manufacturer furnish fans with integral airflow measuring devices? | |
| 8) | Specification 2.1K1&2 reference epoxy immersion coil coating. | |
| a. | Question, please confirm if chilled water coils should match Specification 23 82 16-2.1 (Heating and cooling coils) with 304SS coil casing, aluminum fins and copper tubes (all uncoated), or if special coil coating is required. Epoxy immersion coating is cost prohibited and may not be necessary in our geographical location. It is typically performed by a third party and will significantly increase cost and delivered lead time. | 1 - Yes. UV lights are to be included and are for cleaning the coil. |
2 - The AHU is intended to be operated inside a conditioned space and shall be installed in such a way to maintain that integrity. Double doors are provided for access to the space.
3 - PF is MERV 7 minimum, AF is MERV 11 minimum, and FF is MERV 14 minimum.
4.a - Redundant VFDs can either be provided as a VFD for each fan in the array or side-by-side VFDs with switch between them and a multi-motor controller with overcurrent protection for each motor.
4.b - Refer previous response about motor controllers.
5.a - Yes. Fans to be sized for N+1 redundancy. Provide quantity of fans required to ensure N+1 is obtained. Note that 4 might be required.
6.a - Provide dampers per specifications.
6.b - Contractors are required to coordinate who provides components.
7.a - Contractors are required to coordinate who provides components.
7.b - Provide airflow measuring devices per specifications.
8.a - Epoxy coating not required. However, coils will be exposed to UV lights as clarified with response above.
| 25 | 23 37 00 – FAN FILTER UNITS | |
| 1) | Specification 2.2-6 indicates fan wheels are to be backward inclined. Air Device schedule on sheet M-601 indicates Forward Curved wheels in the model nomenclature (RSR-FC-PSC). | |
| a. | Please confirm if wheels should be forward or backward curved. | |
| 2) | Specification 2.2-8 indicates motors should be electronically communicated (ECM) for constant torque application. Air Device schedule on sheet M-601 indicates PSC motors in the model nomenclature (RSR-FC-PSC). FFU control schematic on sheet M-504 indicates BACnet MSTP. | |
| a. | Please confirm if motors should be ECM or PSC. (BACnet controls interface is only available with ECM motors) | |
| 3) | Please confirm if a spare set of filters should be included from manufacturer. | |
| 4) | Specification 2.2-C2 indicates units to have 304 stainless steel face and plenum construction. Since the exhaust registers (Mark: ER-51 thru 512) are in the same rooms, should they be furnished as 304SS in lieu of steel as indicated on air device schedule on sheet M-601? | |
| 5) | Overlaying Sheet A-101 reflected ceiling plan onto Sheet M-102 ground floor supply ductwork plan shows all of the branch volume dampers mounted in ductwork down stream of supply valve are mounted above inaccessible ceilings. Should these dampers be motorized or include means remote operation via cable similar to young regulator? | 1.a - Provide with Forward Curved fan wheels. |
2.a - Provide with ECM.
3 - Spec 23 40 00 only require to install new filters at final inspection.
4 - Yes. Exhaust registers shall also be 304SS rather than plain steel.
5 - Key Note 7 indicates to provide remote balancing damper. Worm gear cable type are preferred.
| 26 | 23 34 00 – HVAC fans | |
| 1) | Detail 10 on sheet M-501 indicates angular upblast utility set discharge orientation and an adjacent welded stainless steel exhaust stack. Utility sets are drawn on sheet M-103 as upblast. | |
| a. | Question, please confirm fan discharge orientation. | |
| 2) | If Please fan tag 3-EF-139 is in project scope, please confirm design performance | |
| 3) | Exhaust fan Schematic on sheet M-504 indicates redundant fans, each with a VFD and control damper. Only one EF-56 is scheduled on sheet M-601. Only one EF-56 is drawn in enlarged mechanical penthouse plan on sheet M-103. | |
| a. | Question, should EF-56 be furnished as a 2x1 fan array similar to SF-56? | |
| i. | Should EF-56 in AHU be sized for N+1 redundancy, such that in the event of a single motor failure the remaining fan(s) can satisfy 100% of design airflow? | |
| ii. | Should the VFD serving EF-56 match requirements for SF-56 in the AHU spec? | |
| b. | Should MODs and actuators shown in exhaust fan schematic be furnished by mechanical or controls contractor? | 1.a - Detail on M-501 is provided for proper installation. |
2 - Model number of 3-EF-139 is Greenheck 12-BISW-21-10-1, Serial Number: 97D03604 3.a - The schematic for the detail is indicating redundant fans for the upblast exhaust fans EF-1&2 on the upper roof for the Hazardous Exhaust. EF-56 is not intended for redundancy.
3.b - Contractors are required to coordinate who provides components.
| 27 | Louvers | |
| 1) | No specifications found in div 8 or 23 specbook. Please confirm any special project requirements. | 08 90 00 Specification provided in Addendum 01 |
| 28 | Fan Coil Units | |
| 1) | No specifications found in div 8 or 23 specbook. Please confirm any special project requirements. | 23 82 00 - Convection Heating and Cooling Units provided in Addendum 01. |
| 29 | 23 36 00 – AIR TERMINAL UNITS |
2.3 Air flow control valves
| 1) | 2.3E specifies 16 gauge aluminum valve body. 2.3F specifies 316 stainless steel valve body. | |
| a. | Question, please confirm requirement | |
| b. | Typically stainless steel would not be required for non-fume hood exhaust applications. | |
| 2) | Venturi valve schematic on sheet M-503 seems to indicate actuators on supply and exhaust valves. Specification 2.3-H indicates actuators should be furnished, factory mounted. Scheduled call for Constant Volume use and mentions “exhaust valve without need for active controls to hold constant volume”. Controls sequence of operation on sheet M-503 seems to describe variable volume as opposed to constant. | |
| a. | please confirm design intent. | |
| 3) | Note 2 on Supply valve schedule on sheet M-601 mentions "air valve with mechanical adjustment." Is intent to adjust CFM setpoint, or for the valve to mechanically adjust to keep the setpoint? Is the design intent for the valve setpoint to be mechanically or electronically adjustable? Should the CFM control be mechanical or electronic? | |
| 4) | 2.3-G mentions phenolic coatings on internal components – please confirm if this is required for supply and general exhaust (non-fume hood) applications. | |
| 5) | Please confirm if exhaust valves are serving a fume hood (therefore needing to modulate based on sash height) or a biosafety style hood. | 1.a - Provide per specifications. |
1.b - Provide per sepcifications.
2.a - Exhaust valves need to be capable of adjusting to maintain pressurization.
3 - Mechanical adjustment is to help with calibration purposes. CFM to be controlled electronically.
4 - Provide per specifications for all ATUs.
5 - VVE-GC331C-1,2,&3 are serving biosafety cabinets.
| 30 | Can the superintendent double hat as either a QC or SSHO? | Refer to Project Specifications, Section 01 35 26 Safety Requirements, 1.7 "Site Safety and Health Officer (SSHO) and Competent Person (CP). |
| 31 | Can the superintendent triple hat as the QC and SSHO? | Refer to Project Specifications, Section 01 35 26 Safety Requirements, 1.7 "Site Safety and Health Officer (SSHO) and Competent Person (CP). |
| 32 | Is this project tax exempt? If yes, will a certificate be issued? | Contractor will be responsible for taxes. |
| 33 | What are the typical working hours? | Typical working hours are stated in 7:00am to 4:30pm M-F. |
| 34 | What are the requirements for badging? | Requirements include a background investigation of contractors, fingerprinting and badge issued. |
| 35 | Do you have any casework elevations? I did not see any in the drawings. | No casework is part of project, a stainless steel countertop to be provided in GC331E Hazardous Chemo Storage room, see elevation 3/I-101. Additional information for metal countertop can be found in the metal casework notes on I-101 and in specification 12 36 00 Countertops |
| 36 | Please confirm that a full time SSHO is required onsite in addition to the GC's Superintendent/QC Manager | Refer to Project Specifications, Section 01 35 26 Safety Requirements, 1.7 "Site Safety and Health Officer (SSHO) and Competent Person (CP). |
File details come from the government source that posted it. Updated .