Memorandum - Bidding Notes P-1112.pdf

100 International Drive, Suite 152, Portsmouth, NH 03801

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M E M O R A N D U M

TO: Keith Wyeth, PNSY

FROM: Keith Christopher, Weston & Sampson

Robert Musci, Weston & Sampson

DATE: November 12, 2025

SUBJECT: P-1112 Amendment List - Notes for Bidding

Below is the P-1112 amendment list that is intended to inform clarify several items for all bidders of The

Desalination plant.

1. Complete the Price Proposal Form in accordance with the following correction of Cost Line Item

Number (CLIN), Sub-Line Item Number (SLIN), and Bid Option number ordering. Refer to the

Price Proposal Form for the complete description of each CLIN and SLIN.

Price Proposal Form Drawings and Specs

CLIN / SLIN Description CLIN / SLIN

BASE PRICE: Total Price for Line Item 0001 (includes subtotal of 0001A – 0001O), the entire work for Project

P-1112 B72 Resiliency Improvement. The project objective is to provide …

0001 (Base)

0001A

Subtotal of Base Price for hazardous material sampling, abatement, removal, mitigation, and monitoring for B72 Pump Room S, including but not limited to

0001A

0001B

Subtotal of Base Price for hazardous material sampling, abatement, removal, mitigation, and monitoring for B242, including but not limited to

0001B

0001C

Subtotal of Base Price for hazardous material sampling, abatement, removal, mitigation, and monitoring for B72 Room C, including but not limited to ….

0001C

0001D Subtotal of Base Price for executing work associated with Room C, including but not limited to … 0001D

0001E Subtotal of Base Price for executing work associated with Pump Room B, including but not limited to … 0001E

0001F Subtotal of Base Price for executing work associated with Pump Room S, including but not limited to … 0001F

Price Proposal Form Drawings and Specs

CLIN / SLIN Description CLIN / SLIN

0001G

Subtotal of Base Price for executing all structural work associated with Pump Room S, including but not limited to …

0001G

0001H

Subtotal of Base Price for executing all Desalinization

Process work associated with Intake, B242, Pump

Room S, Pump Room B, and Outfall, including but not limited to …

0001H

0001I

Subtotal of Base Price for executing work for all

Medium Voltage (in excess of 480V) Electrical features of the project, including but not limited to …

0001I

0001J Subtotal of Base Price for executing all work associated with Site Civil features including but not limited to … 0001J

0001K

Subtotal of Base Price for executing all site structural work such as micropiles, concrete pads etc. including but not limited to …

0001K

0001L

Subtotal of Base Price for executing all work associated with process instrumentation including but not limited to …

0001L

0001M

Subtotal of Base Price for executing work for the installation of the fire protection system including sprinkler system piping and sprinkler heads, pipe, valves, and fittings including but not limited to …

0001M

0001N

Subtotal of Base Price for providing vendor recommended spare parts supporting maintenance including but not limited to …

0001N

0001O

Subtotal of Base Price for executing work for the installation of maintenance workshop and all associated work within B72 in accordance with the drawings and specifications including but not limited to

0001O

(Items identified as

Option No. 8)

N / A NOT USED 0002 (Option No. 1)

0002 (Option No. 1)

Option Item No. 1: North and South Cooling Tower

Permeate Supply.

Price for …

0003 (Option No. 2)

0003 (Option No. 2) Option Item No. 2: Piping Material Substitution.

Price to … 0004 (Option No. 3)

0004 (Option No. 3) Option Item No. 3: B72 To Berth 5 Saltwater Tunnel.

Price for … 0005 (Option No. 4)

0005 (Option No. 4)

Option Item No. 4: B72 To Manhole/Structure 8-61

Saltwater Tunnel:

Price to …

0006 (Option No. 5)

0006 (Option No. 5)

Option Item No. 5: Re-routing of storm drainage:

Total Price for Line Item 0006 (includes subtotal of

0006A – 0006B) …

0007 (Option No. 6)

0006A

Part A: Manhole/structure 8-61 to Berth 4 Saltwater

Tunnel:

Abandoning in place …

0007A

0006B Part B: Storm Drain line:

Replace drain … 0007B

Price Proposal Form Drawings and Specs

CLIN / SLIN Description CLIN / SLIN

0007 (Option No. 6)

Option Item No. 6: Post construction completion follow-on services:

Price to provide …

0008 (Option No. 7)

N / A NOT USED

0009 (Option No. 8, Items identified as

Option No. 8 shall be represented in SLIN

001O)

0008 (Option No. 7) Option Item No. 7: Temp ASW System.

Price to install … 0010 (Option No. 9)

0009 (Option No. 8) Option Item No. 8: Stair in Pump Room S.

Price to demolish … 0011 (Option No. 10)

0010 (Option No. 9)

Option Item No. 9: Repointing and Repairing of

Existing Brick in Pump Room S.

Price to …

0012 (Option No. 11)

0011 (Option No. 10) Option Item No. 10: Bridge Crane.

Price to install … 0013 (Option No. 12)

0012 (Option No. 11) Option Item No. 11: Accessory Structure.

Price to provide ...

0014 (Option No. 13)

2. Drawing D-102 – Valves shown on D-601 are physically shown on drawing D-102 but they are not called out. Valves are shown on D-2 of drawing D-102. Contractor shall install valves in the ground between buildings B242 and B72.

3. Drawings C-101, C-502, C-503, C-504:

a. Detail J on C502 should be REMOVED because it is not relevant. Fence details are correct on C503 & C504.

4. Drawing C-102 :

a. Keynote 28: Remove the word "install", or revise the note to state "install meter furnished by sub-contractor.

5. Drawing C-102 :

a. There are several references on the drawings that require the following updates.

b. Keynote 10 - update note:

i. UF BREAK TANK REFER TO D-103 and D-107 FOR PROCESS PIPING

c. Keynote 26 - update note:

i. 6-INCH PVC SEWER

d. Keynote 28 - update note:

i. ULTRASONIC FLOWMETER

e. Keynote 31 - update note:

i. 8-INCH PERMEATE MAIN 5-FEET MIN BELOW GRADE

f. Keynote 33 - update note:

i. AIR RELIEF VALVE

g. Keynote 34 - update note:

i. CONSTRUCT PERMANENT BULKHEAD AT TUNNEL CONNECTION TO

BUILDING 72

h. Keynote 35 - update note:

i. BYPASS CONNECTION AND PIG LAUNCHING CONNECTION

i. DELETE Keynote 41

6. Drawing C-105:

a. Tunnel Abandonment-Bid Option 4: Referenced Drawing S-310 does not show the below slab tunnel. Tunnel bulkhead design is on S308.

7. Drawing AD-101:

a. Demolition Floor Plan, Keynote 10 (diamond) and 2 (hexagon) are conflicting at this western stair area. Remove the Keynote 2 (hexagon) from this location. Note that

Keynote 2 still applies to the easterly stair.

8. Drawing S-102:

a. Pump Room S Floor Plan: Keynote 2, add "and tunnel.." to the description in order to differentiate well vs tunnel.

b. Note that there is water and sediment in the tunnels to be abandoned. For the purpose of bidding, contractor is to assume that the tunnels are filled 50% with sediment.

9. C-301, S-302, D-112

a. DELETE "Condensate" in the note "8in HDPE condensate from permeate tank...".

10. DD-101:

a. Pump Room A Demolition Floor Plan: Remove demolition keynotes 10 and 11 which describe IR soils.

11. 23 21 13 POLYPROPYLENE PRESSURE PIPING Section

a. Replace section 2.1.3.c with this language: “Flanged joints must be made up with full-face or ring gaskets as appropriate. Faces of flanges must be clean, free of paint and other imperfections. PP-RCT flanges must be installed per manufactures guidelines utilizing proper flange adapters and stainless steel 316L flange backing rings when required. Provide 316 stainless steel UNC nuts with nylon self locking insert, torque per

PP-RCT manufacturer’s recommendations. Provide additional 316 stainless steel UNC nuts as additional jam nuts, tighten to 20 ft-lbs against the self locking nuts on 8” PP-

RCT piping.”

12. S-121:

a. Pump Room A: Structural Wetwell Plan, The referenced Detail A section cut facing Chamber 6 with the notation of "SIM" for

"similar" is not applicable here. The inside of the channel opening from Chamber 5 to

Chamber 3 via Chamber 6 has to be filled as shown on Drawing DD101.

b. Pump Room A: Structural Wetwell Plan, Section B:

The Section B cut line is along a location that includes the existing 48" inlet from Berth 4.

The existing 48" inlet should be shown here.

13. Pump Room A Process Floor Plan Drawing D-102:

a. 1. Limits of in-scope vs out of scope. The red Line indicates the new limit of the Scope of work for the contract. Note that PP-B242D, XFMR-APD242D and AP-B242D are included in this contract. (See Figure 1 at the end of this Memo.)

b. 2. The note “NEW PARTITION WALL” (C-4 on Drawing D-102) Should be Replaced with

" PROVIDE PARTITION WALL – SEE DRAWING S-122 DETAIL A FLOOR PLAN”

14. Dl100

a. Add Note 3 to the New Work Keynotes:

i. The existing boiler operator station is located on the second floor of the boiler house.

b. Keynote 1, CP-72 is in Pump Room S, not. Room A.

15. Spec 46 64 30, part 2.1

a. Temp ASW operation will be the responsibility of NAVSEA, not the KTR

b. phased construction:

i. The B72 workshop must be built/ coordinated before chemical room can be installed.

ii. B242 accessory structure must be completed prior to demolition and construction in building 242.

c. B242 accessory structure:

i. DB AE to provide code compliance plans/life safety sheets.

16. A-501

a. Detail D – Should show fastening into the mortar joint , Not the brick.

17. MP-102

a. Note 6 – Update Note 6 to “FOR MORE INFORMATION ON PERMEATE LINE ROUTING

AND TIE IN REFER TO DRAWING D-112 AND D-103.”

18. M-103

a. The detail on M-103 that references Detail B3-Sheet M-501 is incorrect. This detail should be updated to reference Detail B3-Sheet M-502.

19. AD-101

a. Remove Notes 1 and 8

20. AD-102

a. Remove Notes 2, 3 ,4 , 5, 6 and 7.

21. SD-103

a. Delete General Sheet Note #3.

22. A-101

a. Delete note 10 from drawing A-301. (this note is shown and noted on Drawing A-101)

23. D-101

a. The blind flange plate detail B should remain as Detail B. Detail B will be updated to reference Detail A, on sheet D-101

b. The callout for detail H, referencing drawing D-504 will be updated to reference Drawing

D-501

24. MP-101

a. The callout detail "1" will be changed to "A".

25. D-102

a. Update The callout for Detail B on Sheet D-301 to Detail B on sheet D-301

26. B72, B242, and Tunnels existing conditions:

a. Sediment in tunnels. The contractor is advised that:

i. Flowable fill can be placed above the existing sediments.

ii. All efforts should be taken to dewater the sediments.

iii. Installing flowable fill above the sediments is not considered to be a structural, rather it will reduce the risk of collapse, so that in the event of a collapse, settlement will be reduced.

iv. As the entry points in the tunnels are established, additional information on the subsurface conditions will be evaluated to determine if additional actions are warranted.

27. The planned new electrical junction box on west face of Bldg 242:

a. Contractor to Modify the ductbank with installation of a manhole west of the accessory structure to better allow for additional bend in ductbank. This will Require confirmation that there is no impact with other utilities for the manhole structure and partial demo of a corner of the loading area which would generally be inaccessible. This brings the ductbank above grade directly below the intended location of the junction box at the face of the accessory structure.

28. The B242 accessory structure: Drawing EP-109

a. Add New Keynote 4:

Furnish and install exhaust fan with interlocked outdoor air louvers. Exhaust CFM to be determined by contractor via shop drawing submittals. The accessory building design drawings to be prepared to PWD-Maine CAD Standards.

29. The B242 demo of exterior receptacle: Sheet Number EP-108

a. Add Note 6 to new work Keynotes:

i. Demo Existing exterior receptacle. Remove all wire and conduit back to the breaker. Remove breaker as applicable. Restore building penetrations as applicable.

Figure 1 (Refer to Item 12)