12. Questions and Answers.pdf

Ques�ons and Answers: General Construc�on Services MATOC for BEP Western Currency Facili�es

No�ce ID: 2031ZA24B00011

1. Is this project tax exempt?

Yes, per FAR 29.302(a).

2. The SF 1442 states we need an offer guarantee. If an offer guarantee is required, what percentage of the bid does it needs to be?

Please follow FAR 52.228-1, which requires the amount of the offer guarantee to be 20% of the offer submitted.

3. Will the building be occupied during construc�on?

Yes.

a. If so, please clarify if the contractor is responsible for temporary HAVC.

Contractor is responsible for minimizing impact to the facility, so they need to provide temporary HVAC where necessary.

4. Does the exis�ng JCI Metasys system require a so�ware upgrade to perform the scope of work regarding the controls?

No.

5. Mechanical General Note 42 on M-001 indicates insula�on must be provided on all piping systems for chilled water, hea�ng water, condenser water, refrigerant and condensate drain.

Please clarify if insula�on is required for steam and steam condensate return pipe.

Required for both per ASHRAE 90.1.

6. Mechanical General Note #47 on M-001 indicates to “Coordinate with contrac�ng officer’s representa�ve for abatement of asbestos.” Please clarify if scope of work includes asbestos abatement. If so, provide details on loca�ons in the building, quan��es, type of insula�on being removed, asbestos report, etc.

Not included.

7. Specifica�ons were not provided with the drawings. Please provide the following items as they are not covered on the drawings:

a. Chilled water, hea�ng water, steam, steam condensate return and cooling coil condensate piping systems:

i. Type of pipe material.

ii. Type of pipe insula�on and thickness.

iii. Is an insula�on jacket required? If so, what type?

iv. Type of insula�on required for thermal hanger shield inserts noted on detail

A4/M-501.

b. Supply, return, outside air and relief air ductwork:

i. Type of duct material.

ii. Required pressure class for each duct system.

iii. Is insula�on required for these duct systems? If so, what type and thickness.

c. Mechanical General Note #40 on M-001 indicates “refer to specifica�ons for complete requirements” regarding equipment. Please provide required air handling unit materials/construc�on, fan type, coil construc�on (type of metal, # of rows, fins per inch), total sta�c pressure, condensate pan materials, etc. as this is not covered on the schedule nor in the schedule notes on drawings M-601 and M-602.

Refer to the attached specifications.

8. Do larger air handling unit sec�ons have to be disassembled, carrying pieces through the building to the unit loca�on and reassembled? What are the maximum dimensions for an AHU sec�on to avoid disassemble and reassemble?

Some units may require disassembly, but they are generally delivered in sections. Contractors approach to moving the sections into place is a question of means and methods.

9. Drawing MH101 shows a new steam and steam condensate return pipe for AHU-9-1-1 & AHU- 12-1-1. However, the pipe is “waved” over what appears to be a corridor and exis�ng pipes are not shown in this area. Please provide the point of connec�on for these new pipes.

Drawing updated.

10. Drawings MH401 thru MH405 have key notes regarding connec�ons to new steam coils and indicate “refer to detail B1/M-502 for valves” (ie, MH401, notes 11 & 12). However, this detail is for a cooling coil condensate P-trap which does not show valves. Please clarify.

11. Drawings MH401 thru MH406:

a. Sheet Note #3 indicates to u�lize exis�ng controllers for monitoring space temperature and smoke detectors and new controls must include control schema�cs, sequence of opera�ons and points lists. Key notes on these same drawings (ie, MH401 #7) indicate exis�ng smoke detectors and control devices are to remain in place. Furthermore, the controls diagrams on drawings M-702 thru M-707 do not indicate what is new vs exis�ng. Please clarify what control devices are exis�ng to remain/reused, which exis�ng control devices are to be demolished and which control devices are new.

i. Some of the new ducts are a different size than the exis�ng ducts. Please indicate where exis�ng dampers or devices need to be replaced due to ductwork replacement and size modifica�ons.

ii. M-702 shows a thermostat and indicates “reconnect to exis�ng sensor” whereas the other controls diagrams on other drawings just show the thermostat. Please clarify if exis�ng thermostats are to remain or be replaced. If replaced, please indicate their loca�ons on the drawings.

b. Are exis�ng point lists available for each AHU to aid in determining the extent of the controls scope of work?

Duct smoke detectors and control devices within spaces (space temperature sensors and differential pressure sensors) are to be reused. All other control devices including motorized dampers and motorized control valves are to be new.

12. Key notes on each of the enlarged floor plans regarding the CHW and HW piping indicate “Refer to detail C3/M-501 and A3/M-501 for valves” (i.e., Key Notes 5 & 6 on MH401). Detail C3 is for a unit with mul�ple coil sec�ons while detail A3 is for a single coil. Each detail seems to indicate the required valves for each of the coil configura�ons. Please clarify which units have mul�ple coils and why each detail is noted for a par�cular unit.

Upon selection with multiple manufacturers, some manufacturers provide single row and some provided two row coils. Based on the contractor's selected manufacturer in compliance with the specification, single or dual coil is allowed.

13. Drawing MH401:

a. The new 44x14 duct for AHU-12-1-1 is larger than the exis�ng duct it is replacing for

AHU-54F. The ductwork replacement extends past a wall where the AHU is located.

i. Confirm if the scope of work includes increasing a wall opening for the new, larger duct. If so, what are the wall materials/construc�on and provide details for enlarging the opening.

ii. Does the scope of work include removal/reinstalla�on of ceilings in the adjacent room? If so, what type of ceilings?

Ductwork to be reconnected within the mechanical space. Adjacent space is not to be affected. Drawings updated.

b. Key Note #8 indicates to demolish the exis�ng hea�ng water pipe back to main and cap open end. Will this work require shu�ng down the en�re hea�ng water system?

Likely not the entire facility, but possibly a portion.

i. If so, does this require the work to be conducted a�er normal working hours?

The Statement of Work (SOW) addresses this in general.

14. Drawing MH402: The new 44x16 duct for MAU-13-1-1 is wider than the exis�ng 42x33 duct it is replacing for AHU-64. The ductwork replacement extends past a wall where the AHU is located.

i. Confirm if the scope of work includes modifica�ons to the exis�ng opening (enlarging and/or filling) or if the new duct can be resized to fit the exis�ng opening. If wall opening modifica�ons are required, what are the wall materials/construc�on and provide details for the modifica�ons.

ii. Does the scope of work include removal/reinstalla�on of ceilings in the adjacent room? If so, what type of ceilings?

Ductwork through wall opening can be reused and reduced for connection to unit. Drawing updated with location of connection adjusted.

15. Drawing M502, Detail C4:

a. The notes on the enlarged floor plans indicate piping shall be replaced to the shut off valves. This detail indicates the point of connec�on is on the upstream side of the bypass valve and points to the middle of the shut off valve downstream of the steam trap. Please clarify if these are exis�ng valves to remain or be replaced.

Detail reference to be updated to show extend of valve replacement.

16. Drawings M-601 & M-602: The schedules indicate MERV 13 filters but the notes for the schedules indicate MERV 8 pre filters with MERV 13 Main Filters. Please clarify if pre filters are required per the notes.

Where MERV 13 filters are indicated, MERV 8 pre-filters are also required.

17. Drawings M702-M707: Smoke detectors are shown to interface with DDC. Please indicate if/how the smoke detectors interface with the fire alarm system?

Duct-mounted smoke detectors must interface with the DDC system and the fire alarm system.

18. The controls diagram on M-702 indicates supply, return, outside and relief air for units with chilled water and steam coils. Relief air ductwork was not found on any of the floor plans. Below are discrepancies noted with this controls drawing, the schedule on drawing M-601 and the enlarged floor plans.

a. AHU-4-1: The schedule indicates 75% outside air for this unit. The enlarged floor plan on MH402 only shows two ducts associated with this unit, one labeled SA and one labeled RA. Please clarify whether this unit has outside and relief air and if so, provide loca�ons, rou�ng, sizes, etc. for these ducts.

Outside air and relief air for this unit are within the space and outside the zone of construction.

b. AHU-9-1: The schedule indicates zero outside air is provided for this unit. The enlarged floor plan on drawing MH401 shows either two or three ducts connected to this unit with two of them each labeled SA. It appears one duct may connect to the rear of the unit and another duct connected to the top. However, the duct on top of the unit is not labeled. Please clarify the ducts connected to this unit. If outside air and relief air are required, provide duct loca�ons, rou�ng, size, etc.

The duct on top of the unit was removed for clarity.

c. AHU-10-M-1: The schedule indicates 100% outside air for this unit. The enlarged floor plan on MH404 only shows two ducts associated with the unit, one is labeled SA while the other is not labeled. The symbol used on the ver�cal duct that is not labeled is for RA per M-002. Please clarify the ducts connected to this unit. If the unit has return, relief and outside air, provide duct loca�ons, rou�ng, size, etc.

Drawing updated to clarify outside air connection.

d. AHU-10-M-2: The schedule indicates 100% outside air for this unit. The enlarged floor plan on MH404 shows two ducts associated with this unit, one labeled SA and the other indicated as both RA and OA per the ver�cal duct symbols. Please clarify the ducts connected to this unit and show loca�ons, rou�ng, size, etc.

Drawing updated to clarify outside air connection.

e. AHU-12-1-1: The schedule indicates the unit has 16% outside air. The enlarged floor plan on MH406 indicates SA, RA and OA for this unit. If this unit has pressure relief, provide the duct loca�on, rou�ng, size, etc.

No Further direction.

f. AHU-14-P-1 & AHU-14-P-3: The schedule indicates zero outside air for these units. The enlarged floor plan on MH405 only shows SA and OA for each of these units. Please clarify the ducts associated with each of these units. If relief air is required, provide duct loca�ons, rou�ng, sizes, etc. Schedule value for zero outside air corrected to the minimum required.

Relief air ductwork and hoods are existing to remain.

g. AHU-14-P-2 & AHU-14-P-4: The schedule indicates zero outside air for these units. The enlarged floor plan on MH405 shows SA, RA and OA for each of these units. Please clarify the ducts associated with each of these units. If relief air is required, provide duct loca�ons, rou�ng, sizes, etc. Schedule value for zero outside air corrected to the minimum required.

Relief air ductwork and hoods are existing to remain.

h. General: Please clarify if economizer mode per the sequence of opera�ons on M-702 is not required where units do not have outside air.

Economizer mode required.

19. Drawing M702: The controls diagram indicates a wall mounted differen�al pressure sensor. Is this a new device or exis�ng to remain? If new, please indicate which spaces are being monitored for pressure and where the wall mounted device is installed.

Reuse existing differential pressure sensor.

20. Controls drawing M-704 indicate supply, return and outside air for AHUs with chilled and hea�ng water coils.

a. The schedule on M-602 indicate AHU-11-1-1 & AHU-11-1-2 each 10-100% outside air.

The enlarged floor plan MH401 only shows two ducts associated with each of these units, each labeled SA and RA. Please clarify how each AHU gets OA and provide OA duct sizes, loca�ons, rou�ng, etc.

For AHU-11-1-1 and AHU-11-1-2, return air provided by grille below mixed air plenum and outside air is provided by common plenum to roof. No change required.

b. The schedule on M-602 indicate AHU-12-1-1 & AHU-12-1-2 each have 23-100% outside air. The enlarged floor plan on MH401 possible shows three ducts associated with AHU- 12-1-1 and only two ducts associated with AHU-12-1-2. All ducts are labeled as SA.

Please clarify the RA & OA for each of these units and provide duct sizes, loca�ons, rou�ng, etc.

For AHU-12-1-1, the system abbreviation on the tags will be revised. AHU-12-1-2 is not in the drawing set.

21. Drawings M-705:

a. The points list indicates AHU building differen�al pressure but the differen�al pressure sensor is not shown on the controls diagram on M-704. Please clarify.

Drawing updated. The existing space differential pressure sensor will be re-used.

b. The points list indicates AHU pressure relief damper command and posi�on but the controls diagram on M704 does not indicate pressure relief. Please clarify.

Drawing updated. Refer to economizer section for sequence.

22. The controls drawing M-707 indicates cooling only air handling units have supply, return and outside air. The schedule on M601 for AHU-7-2-1 (cooling only) indicates outside air ranges from 20-100%. The enlarged floor plan on MH404 shows three ducts associated with this unit, each labeled SA. Please clarify which duct is SA, RA and OA.

23. This ques�on was previously submited on March 18th, no division specifica�ons have been posted with the solicita�on. Will UFGS Specifica�ons (i.e. Division 01, 02, 21, 22, 23, 26, 28) be issued for the seed (Air Handler Refurbishments, Phase 4) project? These are needed at the earliest as they impact selec�on and pricing of materials.

Refer to attached specifications.

24. This ques�on was previously submited on March 18th, when does the BEP an�cipate issuing a revised 100% drawing package as discussed during the pre-bid mee�ng?

Drawing package Attached.