36C24418B0580-007.pdf

Addendum No. 1

Pertaining to the drawings:

MH101 through MH108.

1) Add the following to the Sheet Notes, “Install FCUs with sufficient elevation to facilitate no less than 1/8” per ft. condensate drainage pitch, considering all obstructions. Greater pitch is preferred. Field coordinate prior to installation.”

2) Add the following to the Sheet Notes, “Coordinate final placement of temperature and humidity sensors or stats with the VA COR. “

3) Where “domestic cold water” is indicated, it shall be understood to mean “reverse osmosis” water.

MH103. Refer to attached revised MH103 which indicates the current existing ductwork in the SPS suite.

MH211.

1) Drawing title shall read “…59…”, in lieu of “…57…”.

2) Refer to attached revised MH211 which rotates the attic plan for ease of spatial coordination with other plans.

MH212. Refer to attached revised MH212 which identifies the AHU being commissioned as located in the basement.

M-602.

1) AHU Schedule. In the schedule title, edit “PURPUSES” to read “PURPOSES”.

2) AHU Schedule. Refer to added note 6 identifying when TAB/Commissioning work shall occur.

3) AHU Schedule. 69-HR-AH-1 location and type categories have been corrected to “Basement” and “Indoor”.

M701. Add the following as a general sheet note, “Coordinate final placement of temperature and humidity sensors or stats with the VA COR.”

Pertaining to the Specifications:

SECTION 22 11 00 - FACILITY WATER DISTRIBUTION: ADD the following to 2.2

G. Reverse Osmosis (RO) Water Piping:

a. Low Pressure Feed, Reject and Recycle Piping, 75 psi and under:

ASTM D 1785, Schedule 80 PVC, socket welded and flanged.

b. RO Product Tubing From Each Membrane Housing: ASTM D1785, Schedule 80 PVC, socket welded and flanged.

c. Low Pressure Control and Pressure Gauge Tubing: Polyethylene.

d. High Pressure Reject and Recycle Piping (above 75 psi): ASTM

A269, Type 304 schedule 10 stainless steel with butt welded joints.

e. High Pressure Control and Pressure Gauge Tubing: 1000 psi burst nylon.