Pre-Bid RFI 316 HVAC Project 09-01-2020.pdf

Date: RFI RFP Reference QUESTION GOVERNMENT RESPONSE

8/20/2020 1

Specification 01 31 00, 1.8 Digital Project Management Software ‐ Is the Government mandating for contractors to purchase Newforma, Inc. in order to communicate on this project? Is this compatible with Government programs and access?

Project management software will not be required for this project. Email will still means of document transfer for this project, large files 20+mb will need to be sent via DoD safe. Ability to provide accurate schedules is the requirment

8/20/2020 2

Interior Drains work ‐ No foundation plans were provided. How is the penetration going to be done?

Can the Government provide a detail through foundation at exterior wall?

Please see the attached drawing

8/20/2020 3 Concrete for water line ‐ There is no mix design for concrete, please advise to concrete mix design intended.

Please see the specification below:

a. Use of fly ash will not be permitted.

b. Compressive Strength (28‐Day): 4000 psi, minimum.

c. Flexural Strength (28‐Day): 650 psi, minimum.

d. Slump Limit at Point of Placement: 4‐8 inches depending on mix design submitted by contractor.

e. Air Content: 5.5 percent to 7.5 percent.

f. Concrete to be 6" thick All values to be tested before or after placement.

8/20/2020 4 What is the finish required for concrete? Broom finish to match the adjacent panels

8/20/2020 5

SOW ‐ requires contractors to locate all utilities. Can the Government provide utility plans reflecting all utilities in an area? What is the contractor's responsibility for repairs to utilities not shown by the Government.

Yes, please see the attached pdf of the utilities in the work area. They are not the contractors responsibly to repair unless marked by the government.

8/20/2020 6 01 31 00 1.9 Progress Meetings: what is the intended time for each progress meeting weekly progress meeting

The progress meeting time will be a time agreed upon by both the government and the contractor. We are unable to advise at this time due to the uncertainty of COVID, workload etc.

8/20/2020 7 01 33 00 Submittal procedures: states to use "web based software" Can you clarify what minimum software needs are anticipated?

Email will be the way submittals are sent unless they are large file sizes then will need to be sent through dod safe

8/20/2020 8 01 73 00 please advise on intent of section

Section lays out some of the typical steps in project execution and other items not covered in other sections. The initial land survey will not be necessary as there is no survey data associated with the NDI floor drain project. A survey will need to be completed so .dwg asbuilts can be provided by the contractor for the whole project including the NDI floor drain/sanitary sewer portion.

8/20/2020 9

Access ‐ during site visit access was limited and no phones were allowed due to restricted areas for entire project. Phasing plans states at least three phases. Will contractors be provided full unrestricted access for areas in current phases? Phones are important for daily work and coordination and will increase cost if prevented.

While work is being performed in an area contractors will be able to have phones once government equipment has been moved out so work can be performed. 100% completion of each phase will be necessary before moving to the next.

Pre-Bid RFI Log for B316 HVAC Project

8/20/2020 10 01 77 00 Final Cleaning ‐ many items specified to be cleaned that are not within the SOW. Please advise.ee

Any area where work is being performed or track out from a work area must be cleaned by the contractor. Final cleaning must be completed before a phase is completed

8/20/2020 11 02 41 19 3.1 a,b, c ‐ Can you explain the intent of section?

Project and contractor safety. B. If additional demolition not called out in the plan set is required it may be necessary for a structural engineer to be contracted with.

8/20/2020 12

09 51 23 Acous. Ceiling Tiles ‐ existing ceilings have a bunch of non standard hangars supporting electrical systems. These can't move and grid needs to be installed in exact locations. Does the Government assume the integrity of the system without proper design around such furnishings?

Contractor will be responsible for supporting and replacing anything that attaches to the grid or ceiling tile during and after construction. For example Lights must be supported or taken down then replaced, the same goes for all other infrastructure.

8/20/2020 13

Aurora model 344 pump listed for the CHWP‐1,2 Chilled Water Pumps. This pump has been out of production for about a year and was replaced with the model 3804.Can you confirm this with Engineer?

Existing chilled water pumps to remain are 7.5 HP. The existing chiller is to remain also. Startup will need to be reaccomplished and the equipment warranted due to the startup. Startup must include but not limited to reprogramming of the drives for the new system and servicing of strainers.

8/20/2020 14

CHWP also appears to have been sized without using 30% Prop glycol so it notes a 5hp motor, the new pump sized with 30% Prop glycol has a 7.5hp motor.

Please advise.

See 13 above

8/21/2020 15 Can outage work be performed during the listed duty day?

Outage work is to be performed on off duty hours.

8/21/2020 16

Regarding Note under Existing Front End Interface on M-701: In order for the new gateway router to integrate back to the owners BMCS, please confirm that the owner will provide and install the ethernet cable, IT hardware, and connectivity support including port assignments to accommodate coms back to the owner's existing BMCS.

contractor must provide all cable and hardware to get to the correct port in the comm rooom and the base will identify the port post award

8/21/2020 17

Please identify if the Advantage Controls - Megatron System meets the "base standard" as a Water Treatment System that comes with " CONTROLLER WITH BACNET CARD" as identified on M-704.

See attached.

Please remove the automatic chemical feeder and controller from the scope there is a chemical pot feeder on both systems

8/21/2020 18

Domestic Water meter, Electric Utility meter, and Natural Gas Utility meter details appear to be excluded from this scope of work. If this is not intentional, please provide details on product line requirements, placement, and control requirements for these items to be included in this contract.

Yes they have been excluded from the scope of this project. Please size building automation controller to revive them at a later date.

9/1/2020 19

The main air handler and the chiller will be down for a while. And the existing Liebert unit in room 106 does not work. Do we need to supply temporary heating and cooling when the equipment from room 110 is relocated to room 106?

Yes please see SOW "Contractor will be responsible during for all Temporary equipment (boilers, chillers, etc) to maintain 70°F from the date of Award" The temperature can be as low as 65 in the winter for heating.

9/1/2020 20 Does existing rectangular duct work need sealed? No

9/1/2020 21 Does existing rectangular and round duct work need cleaned?

No, unless excessive construction dust or debris is generated and they become dirty. Please note condition at the beginning of the job.

9/1/2020 22 Does a duct leakage test needed to be performed Yes, ductwork is being modified.

9/1/2020 23 Can the same contractor performing HVAC repair also Yes, they can with proper credentials and experience.

9/1/2020 24 treatment for existing chilled and hot water Not at this time 9/1/2020 25 locate utilities. Okie will not locate the private utilities Please see RFI answer 5 9/1/2020 26 Is there a list of companies that has performed No 9/1/2020 27 Will there be an onsite dumpster for the concrete Contractor is responsible for removal of all construction debris, including removed concrete.

9/1/2020 28

Sheet MD402 Shows to demo chilled water back to chiller. On the job walk we were told not to demo all the way back. Where do we stop our demo on the chilled water piping?

On the job walk you were made aware that the chiller and pumps were replaced. Do not demo recently replaced piping.

9/1/2020 29 Sheet M‐501. Shows a buffer tank BT‐1 and CHWP‐1 &

2. Are these items to be new?

CHWP 1 & 2 and the chiller have been recently replaced and will not need to be replaced. All other equipment will need to be replaced in this project including BT‐Q

9/1/2020 30 Do we need to do a bid bond on our part?

Per Block 13B of the solicitation and FAR 52.228‐1 a bid guarantee (bod bond) is required to be provided by the bidder in the amount of"20 percent of the bid price or $3,000,000 whichever is less."

Per Block 12 of the solicitation: Performance and payment bonds will be required from the awarded to contractor wihtin 10 days after award.

9/1/2020 31 Where patching walls from moving duct, paint the entire wall corner to corner or patched area only?

If the wall is less than 30ft corner to corner or corner to a large door opening paint the whole wall. If it is over 30ft paint the patched area

9/1/2020 32 Who is responsible to move equipment and furniture, base personnel or contractor?

The contractor will be responsible for moving furniture and the 400hz generator. The contractor will also need to add a junction box and plug for the 400 hz generator in room 105. All other equipment will be moved by the government. The government will need one week between phases to move equipment.

9/1/2020 33 existing to be saved and reused? It is to be new ACT‐1.