P01-537-26-200 AHU-AC21 ADDENDUM 1.pdf

DATE: May 15, 2026

TO: PROSPECTIVE BIDDERS

SUBJECT: ADDENDUM NO #1 TO THE BIDDING DOCUMENTS FOR

PROJECT #: VA 537–26–200

PROJECT TITLE: FACILITY COOLING IMPROVEMENTS AT THE JESSE BROWN VAMC

This addendum forms a part of the bidding and contract documents and modifies the original bidding documents of the solicitation posted on May 6, 2026, for the REPLACEMENT OF AHU-AC21 Serving Nutrition Food and Service.

I. CONSTRUCTION STATEMENT OF WORK

1. Under Part 2: Period of Performance (POP):

a. Change the number of calendar days from 245 days to 308 days of NTP, page 4 0f 15.

b. Item 3: Phase 3 Preconstruction/VA review: Change to “The VA will have 14 calendar days to review each submission, page 5 of 15.

2. Under Part 3: Detailed Project Scope of Work:

a. Item 2: AC-21 Hydronic distribution: 2.p., replace 60% propylene glycol with 30% propylene glycol, page 6 of 15.

b. Item 5: Fin Tube Radiation System: complete the sentence by adding “control valves and thermostatic traps.”, page 6 of 15.

II. PROJECT MANUAL

Replace the Project Manual in its entirety with the revised copy attached.

III. DRAWINGS

1. SHEET MD-1: Scope of Work Notes

a. Note 1: Add the following to the note: Contractor shall inspect, repair, and replace ductwork, dampers, and branch connections, as necessary.

b. Note 5: Delete this note in its entirety and replace it with “The existing ductwork system must be tested before the start of the demolition work, and identify areas of corrections, and after the installation is completed through TAB to verify compliance with the design documents.

2. SHEET MD-2:

Under “Equipment associated with the AC-21 project to be removed and replaced.”

a. Note #2: Delete and replace it with “Remove and replace Exhaust Fan Rv-16 and fan inlet ductwork. The horizontal run of the ductwork size 33”x25”. The vertical run (down through the roof) size 33” x 20”. Size the elbow to the fan as per the dimensions of the fan inlet.

b. Note #15: Insert the word “Dispose of” in front of the AIR HANLER/DX COIL….

c. Note #16: Add the following to this note: at the point of penetration into the building.

Under “General Demolition Notes”

a. Note #8: Replace “Energized” with De-energized.”

3. SHEET MD-3:

a. Delete Note #2” Remove Damaged Insulation and Reinsulate Piping”, and photograph #2 “Piping Missing

Insulation.”

b. Change Note #4 to “Type of OA Louver to Cool Equipment in the New AHU-AC 21.”

c. Caption under photograph #6 should read 26”x18”x20” deep instead of 6’x2”.

4. SHEET M-1:

a. In In the Ventilation Schedule, delete the entries 230 and 142 under the columns “Actual Supply” and “Exhaust

CFM”.

5. SHEET M-2:

a. AHU-AC21 Schedule:

i. Replace the FAN CFM to read 28,740 cfm instead of 33,522 under FAN CFM, and under CFM for both the Cooling and Heating Coils, respectively.

ii. Under EXT. SP insert 3.00.

iii. Under Total S.P. insert 6.47”

iv. Add a new column to the schedule for the Cooling Coil GPM to read 444 GPM.

v. Under “Heating Coil”, column “GPM”, replace 347 with 325 GPM.

vi. Under “Pre Filter” column, including the following:

• PF-1 = MERV 7.

• PF-2 = MERV 13.

b. FAN Schedule:

i. For E-2 under “Service” it should read General Exhaust, and under “Type”, correct the spelling to read

UTILITY FAN.

ii. For RV-16, under “Service”, it should read Kitchen Exhaust, and under “Location”, it should read Roof

Mounted, and under "Type” CENTRIFUGAL FAN.

6. SHEET M-3:

a. PUMP Schedule:

i. Under “Remark”, add the following: Pump performance to be based on a 30% glycol mixture.

7. SHEET M-6:

a. In detail #2 “Base Mounted Pump Detail”, add the following note:

The triple duty valve or balancing valve is primarily intended for flow measurement during TAB work. These valves must be kept fully open once the TAB is completed. Throttled valves at the pumps are not permitted.

b. In detail #3, the HWS/HWR return piping shall be 4” NOT 5”.

8. SHEET M-7:

a. Delete dashed box S/1 to the right of the new exhaust fan E-2.

b. Under “AHU AC21 And New Associated Equipment to Be Installed On this Project”, replace note#2 with “New Exhaust Fan RV-16, including new inlet ductwork.

c. Edit the note that calls for an adjustable OA, 26”X 60” louver, to read 26”X 18” X 20” deep instead.

d. New note, “New Inlet Ductwork” added to the intake ductwork for exhaust fan RV-16.

9. SHEET M-8:

a. Under “General Notes and Conditions”

i. Note #7 shall read 2-pipe fan coil units.

ii. Delete note #8 and replace it with “Area thermostats must control the fin tub radiator.”

10. SHEET TC-1:

a. Correct the printing overlapping on the left-hand side of the drawing as follows:

i. The” TEMPERATURE CONTROL GENERAL NOTES” line, should be above Note #1 and note #2 should be follows Note#1.

ii. The “SYSTEM ARCHITECTURE NOTES” line, should be above Note#1 and note#2 should be moved below

Note #1.

11. SHEET TC-2:

a. The table for hardware and software points should refer to 2-PIPE FCU in the upper entry of the first column of the table.

EXCEPT AS MODIFIED HEREIN, ADDENDUM #1 AND THE ORIGINALLY ISSUED BID DOCUMENTS SHALL REMAIN IN FULL FORCE

AND EFFECT.

Attachments:

1) P01-Revised AHU-AC21 Schedule-ADDENDUM#1

2) P01-SOW Exhibit A-Annotated Drawings - 537-26-200 ADDENDUM#1

3) P01-SOW Exhibit B-Project Manual R-537-26-200 ADDENTDUM#1