D006633-5 Addendum 2_signed.pdf

KATHY HOCHUL

Governor

KATHY MOSER

Commissioner

OFFICE OF PARKS, RECREATION AND HISTORIC PRESERVATION | ALBANY, N.Y. 12238 | PARKS.NY.GOV | (518) 474-0456

ADDENDUM NO. 2

TO PLANS AND SPECIFICATIONS FOR

PROJECT SA-SI-2026-001

GC-D006633 EC-D006634 PC-D006635

Water Treatment System Rehabilitation

Schodack Island State Park

THIS ADDENDUM TO THE PLANS AND SPECIFICATIONS IS ISSUED TO MODIFY, EXPLAIN OR

CORRECT THE ORIGINAL DRAWINGS AND SPECIFICATIONS AND IS HEREBY MADE A PART OF THE

BIDDING DOCUMENTS. PLEASE ATTACH THIS ADDENDUM TO THE BACK OF THE COVER SHEET OF

THE SPECIFICATIONS IN YOUR POSSESSION.

Additions to Specifications:

1. Add to Specification Section 017300.3.08.A: Provide Sodium Hypochlorite 12.5% to fill chlorine tanks for equipment start-up.

2. Add to Specification Section 400517:

3.7 DISINFECTION OF PROCESS PIPING

A. Following successful completion of installation, inspection, and pressure testing, disinfect all potable water process piping, valves, fittings, pumps, and appurtenances that will convey finished or treated potable water.

B. Perform disinfection in accordance with the latest editions of ANSI/AWWA C653, Disinfection of Water

Treatment Plants, for treatment process piping and equipment. Where piping will function as a finished water transmission main or distribution main, disinfection shall additionally comply with ANSI/AWWA

C651, Disinfecting Water Mains.

C. Prior to disinfection:

1. Flush all piping with potable water to remove dirt, debris, oils, solder flux residue, and other foreign materials.

2. Verify that all pressure testing has been successfully completed.

3. Install temporary connections, sampling ports, and drainage piping as required to complete the disinfection procedure.

D. Introduce a chlorinated potable water solution into the piping system and maintain the required disinfectant concentration and contact time in accordance with ANSI/AWWA C653. Ensure all portions of the piping system, including valves, fittings, and appurtenances, are completely filled with the disinfecting solution throughout the required contact period.

E. Following the required contact time, flush the system with potable water until the chlorine residual is comparable to the normal operating residual of the public water system or as directed by the Engineer.

F. Where required, dechlorinate disinfectant water prior to discharge in accordance with ANSI/AWWA

C655, Field Dechlorination, and all applicable federal, state, and local environmental regulations. Dispose of flushing and disinfection water in a lawful manner.

KATHY HOCHUL

Governor

KATHY MOSER

Commissioner

OFFICE OF PARKS, RECREATION AND HISTORIC PRESERVATION | ALBANY, N.Y. 12238 | PARKS.NY.GOV | (518) 474-0456

G. After flushing, collect bacteriological samples at locations designated by the Engineer. Sampling and laboratory analysis shall be performed by a laboratory certified by the New York State Environmental

Laboratory Approval Program (ELAP), unless otherwise approved by the Owner.

H. The piping system shall not be placed into service until:

1. Bacteriological test results are satisfactory.

2. All required corrective actions, if any, have been completed.

3. Written acceptance has been provided by the Engineer and any required approval has been obtained from the New York State Department of Health.

I. The Contractor shall furnish all labor, equipment, temporary piping, chlorination chemicals, dechlorination chemicals, testing, sampling, laboratory services, documentation, and incidentals necessary to complete the disinfection process.

Kurt Kress, P.E.

Assistant District Manager

Date: August 5, 2026