Attachment J - 59020903_Addendum_1_05302024_W RFI10.pdf

TO: Anna Bernas-Kelly (COR) Hampton VA Medical Center

100 Emancipation Drive Hampton, VA 23667

PROJECT NAME: Correct FCA Deficiencies Steam Distribution System

CONTRACT NO: 36C24624R0045

STATION PROJECT NO: 590-20-903

A/E PROJECT NO: 22-118

ADDENDUM NO. #1

ISSUE DATE: 05/30/2024

The following instructions and the listed documents below are hereby created to be incorporated as part of the contract documents.

SUPPLEMENTAL INSTRUCTIONS:

1. This Addendum is being submitted to provide phasing plan for construction and additional pipe support details for pipes located inside building crawlspaces.

SPECIFICATIONS INCLUDED AS PART OF THIS ASI:

NONE.

DRAWINGS INCLUDED AS PART OF THIS ASI:

1. M002 (This drawing is new to the construction documents and provides phasing instructions.)

2. S301 (This drawing adds additional details for pipe supports.)

END OF ADDENDUM #1

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35 36

113A

110B

110A

110C

137A 137B

137C

A. COORDINATE ALL MECHANICAL SERVICE OUTAGES WITH

VA/COR IN WRITING WITH MINIMUM TWO WEEKS NOTICE.

B. CONTRACTOR IS RESPONSIBLE FOR ALL MODIFICATIONS TO THE

EXISTING PIPING NECESSARY TO PERMIT THE INSTALLATION OF

NEW WORK.

C. CONTRACTOR IS RESPONSIBLE FOR ADHERING TO ALL OSHA

AND VA REQUIREMENTS FOR ACCESS AND WORK WITHIN A

PERMIT REQUIRED CONFINED SPACE.

D. CONTRACTOR SHALL PHASE CONSTRUCTION TO PROVIDE

UNINTERRUPTED SERVICE TO BUILDINGS DESIGNATED AS

CRITICAL. PHASING PLAN SHALL BE SUBMITTED TO VA/COR FOR

REVIEW PRIOR TO START OF CONSTRUCTION ACTIVITIES.

E. REFER TO INDUSTRIAL HYGIENIST DRAWINGS FOR LOCATIONS

WITH ASBESTOS CONTAINING MATERIAL (ACM). ABATEMENT

SHALL TAKE PLACE ACCORDING TO INDUSTRIAL HYGIENIST

RECOMMENDATIONS.

GENERAL NOTES

PHASING NOTES

THIS PHASING PLAN AIMS TO HIGHLIGHT POTENTIAL REQUIREMENTS

FOR ADDITIONAL WORK OR EQUIPMENT TO BE PROVIDED AT

DIFFERENT POINTS DURING CONSTRUCTION. IT IS NOT THE INTENT

OF THIS PHASING PLAN TO BE ALL-INCLUSIVE OR PROVIDE THE

CONTRACTOR SPECIFIC INFORMATION RELATED TO SEQUENCING

OR MEANS AND METHODS. THE CONTRACTOR IS RESPONSIBLE FOR

SUBMITTING A DETAILED PHASING PLAN TO THE VA PRIOR TO

COMMENCING ANY WORK.

THIS PHASING PLAN BREAKS THE PROJECT DOWN INTO THE

FOLLOWING CATEGORIES:

ITEM A: STEAM TUNNEL CONDENSATE RETURN PIPING

ITEM B: CONDENSATE PIPING AND EQUIPMENT WITHIN BUILDING

ITEM C: BUILDING 15 BOILER PLANT STEAM EQUIPMENT

ITEM D: BUILDING 15 BOILER PLANT FUEL EQUIPMENT

1 ITEM A:

DURING REPLACEMENT OF CONDENSATE RETURN PIPING WITHIN

STEAM TUNNEL, AFFECTED BUILDINGS WHOSE PATH OF

CONDENSATE RETURN TO BUILDING 15 HAS BEEN INTERRUPTED

SHALL DISCHARGE CONDENSATE TO A NEARBY FLOOR DRAIN

WITHIN EACH BUILDING'S RESPECTIVE MECHANICAL ROOM.

CONTRACTOR SHALL PROVIDE TEMPORARY CENTRIFUGAL

BOILER BLOW OFF CONDENSATE COOLER AND DOMESTIC COLD

WATER LINE TO FLASH AND COOL CONDENSATE BEFORE

DISCHARGING TO DRAIN IN EACH RESPECTIVE BUILDING.

TEMPORARY EQUIPMENT AND PIPING SHALL BE SIZED TO

ACCOMMODATE EXISTING PIPE SIZES SERVING EACH BUILDING.

CONTRACTOR SHALL PROVIDE ALL NECESSARY PIPING AND

VENT CONNECTIONS.

2 ITEM B

IF CONTRACTOR CAN COORDINATE REPLACEMENT OF

CONDENSATE RETURN PIPING AND EQUIPMENT WITHIN BUILDING

110 TO OCCUR SIMULTANEOUSLY WITH STEAM TUNNEL PIPING

REPLACEMENT, NO ADDITIONAL TEMPORARY WORK MAY BE

REQUIRED EXCEPT WHAT IS DETAILED IN ITEM A.

ALTERNATIVELY, CONTRACTOR MAY INSTALL NEW CONDENSATE

RETURN PIPING ADJACENT TO ACTIVE EXISTING AND PERFORM A

SHUTDOWN FOR FINAL PIPE CONNECTIONS.

3 ITEM C:

MAKE-UP WATER - DURING REPLACEMENT OF ITEM A, MAKE-UP

WATER FOR THE BOILER SHALL BE PROVIDED TO MAINTAIN

UNINTERRUPTED STEAM SUPPLY GENERATION. THE TEMPORARY

MAKE-UP WATER SYSTEM SHALL BE LARGE ENOUGH TO PROVIDE

SUFFICIENT TREATED WATER FOR THE BOILER TO OPERATE ON

100% MAKE-UP WATER. THE DESIGN WILL REQUIRE THE

INSTALLATION OF A TEMPORARY 3” DOMESTIC WATER

CONNECTION. THIS WATER MUST BE TREATED WITH THE SAME

RO/DI, CHEMICALS, AND SOFTENING METHODS IN USE BY THE

CURRENT BOILER MAKE-UP WATER SYSTEM. THE WATER SHALL

ACCUMULATE IN A TEMPORARY STORAGE TANK SIZED FOR 2-3

CYCLES OF BOILER FILL TO PROVIDE A BUFFER. THE TREATED

MAKE-UP WATER SHALL TIE INTO THE BOILER FEEDWATER

SYSTEM AT SOME POINT AHEAD OF THE DEAERATOR TANK. THE

CONTRACTOR SHALL BE RESPONSIBLE FOR ALL COMPONENTS

INCLUDING PUMPS, TANKS, FILTERS, VALVES, ETC. NECESSARY

TO PROVIDE ADEQUATE BOILER FILL.

VACUUM PUMP - CONTRACTOR SHOULD MAKE EFFORTS TO

REPLACE VACUUM PUMP WHILE CONDENSATE VACUUM PIPING

WITHIN THE STEAM TUNNEL IS UNDERGOING REPLACEMENT TO

AVOID POTENTIAL TEMPORARY EQUIPMENT. ALTERNATIVELY,

CONTRACTOR SHALL PROVIDE TEMPORARY VACUUM PUMP

SIZED ACCORDING TO NEW EQUIPMENT SCHEDULES AND

PROVIDE TEMPORARY PIPING SOLUTION AS NECESSARY.

CONDENSATE TRANSFER PUMPS - CONTRACTOR SHOULD MAKE

EFFORTS TO REPLACE CONDENSATE TRANSFER PUMPS DURING

REPLACEMENT OF STEAM TUNNEL CONDENSATE PIPING

REPLACEMENT TO AVOID POTENTIAL TEMPORARY EQUIPMENT.

ALTERNATIVELY, THE TWO CONDENSATE TRANSFER PUMPS MAY

BE ISOLATED FROM EACH OTHER AND REPLACED IN SEQUENCE.

CONTRACTOR SHALL PROVIDE ANY TEMPORARY PIPING

SOLUTIONS NECESSARY.

BOILER FEED-WATER PUMP - CONTRACTOR SHALL ISOLATE

EXISTING TURBINE BOILER FEED WATER PUMP AND TRANSFER

FULL LOAD TWO OTHER EXISTING PUMPS. NO TEMPORARY

EQUIPMENT SHOULD BE REQUIRED.

BLOW-DOWN TANK - IF TEMPORARY BLOW-DOWN TANK IS

REQUIRED, PROVIDE SIZED ACCORDING TO NEW SCHEDULED

SIZE OF BLOW-DOWN TANK ON SHEET M601.

4 ITEM D:

CONTRACTOR SHALL PROVIDE TEMPORARY FUEL PUMP SYSTEM

SIZED ACCORDING TO NEW SCHEDULE ON SHEET M601.

TEMPORARY FUEL PUMPS MAY NOT BE REQUIRED IF

CONTRACTOR CAN INSTALL NEW FUEL PUMPS ADJACENT TO

EXISTING OR IF EXISTING PUMPS CAN BE REPLACED

SEQUENTIALLY.

CONTRACTOR SHALL REPLACE FUEL PIPING BETWEEN THE

PUMPS AND THE OUTDOOR STORAGE TANKS IN TWO PHASES.

PHASE ONE SHALL BE REPLACEMENT OF ALL PIPING BETWEEN

THE FUEL PUMPS AND THE TWO SMALLER OUTDOOR FUEL

STORAGE TANKS. PHASE TWO SHALL BE REPLACEMENT OF ALL

PIPING BETWEEN THE FUEL PUMPS AND THE LARGE OUTDOOR

FUEL STORAGE TANK. CONTRACTOR SHALL PROVIDE ALL

REQUIRED VALVES TO COMPLETE WORK.

BLOW DOWN / CONDENSATE COOLER SCHEDULE

EQUIPMENT

TAG EQUIPMENT TYPE LOCATION SERVICE MANUFACTURER MODEL TYPE MAWP

(PSI) NOTES

VARIES BLOW DOWN /

CONDENSATE COOLER

VARIOUS BUILDING

MECHANICAL ROOMS CONDENSATE CEMLINE CBO TANGENTIAL 150 1,2,3,4,5,6,7

NOTES:

1. OTHER ACCEPTABLE MANUFACTURERS: VA APPROVED EQUAL.

2. TANK SHALL HAVE TANGENTIAL BLOW OFF INLET AND MINIMUM 3/8" THICK 90 DEGREE WEAR PLATE.

3. TANK MATERIAL OF CONSTRUCTION SHALL BE CARBON STEEL.

4. PROVIDE TEMPERATURE CONTROL VALVE TO MAINTAIN PROPER DRAIN TEMPERATURE.

5. TANK INSULATION SHALL BE FIELD APPLIED AS SPECIFIED IN VA SPECIFICATION 23 07 11.

6. TANK SHALL CONFORM TO ALL REQUIREMENTS SET FORTH IN VA SPECIFICATION 23 50 11 SECTION 2.4.

7. TANK SHALL BE SIZED TO PAIR WITH EXISTING PIPE SIZE IN EACH RESPECTIVE BUILDING'S MECHANICAL SPACE.

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

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ISSUE FOR BIDOffice of Construction and Facilities Management

U.S. Department of Veterans Affairs

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PhaseARCHITECT/ENGINEER OF RECORD STAMPCONSULTANT

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CORRECT FCA DEFICIENCIES

STEAM DISTRIBUTION SYSTEM

HAMPTON, VIRGINIA

590-20-903

Project Director

Revisions: Date:

www. bancroft-ae.com

BAE PROJECT NO. 22-118

3300 Dundee Road Northbrook, IL 60062

T: 847.952.9362

VA CONTRACT NO. 36C24622C0070 05/30/2024

0 16' 32' 64' 128'1/64"=1'-0"1 MECHANICAL - SITE PLAN OVERALL - PHASING

NORTH

MECHANICAL - PHASING PLAN

RH RR

M002

OVERALL

ADDENDUM 1 05/30/2024

ADDENDUM #1

SEA-2024-05-30-ADD1