Am_0003.pdf

Correction to Amendment 0002 Question 4

Contractor Question and Response

Q4. Please confirm that the relocation of the existing 12” Waterline is at the East Bank of Algiers Canal (Base Work) and West Bank of Algiers Canal (Option Work) only and not through the Algiers Canal.

R4. Yes. The existing 12" waterline underneath Algiers Canal is not being relocated. Relocation is limited to the East and West Banks of Algiers Canal only.

SECTION 01 53 00.02 12

1. Page 42, paragraph 1.3. Add the following publication to the listing as:

“THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)/ NATIONAL

ASSOCIATION OF CORROSION ENGINEERS (NACE)

SSPC-SP 7/NACE No. 4 (2004) Brush-Off Blast Cleaning”

2. Add the following new paragraph after paragraph 2.1:

“2.2 USED STEEL SHEET PILING

Sheet piling required for the TRS/TFP may be used sheet pile. Steel for the used sheet piling shall conform to the requirements of ASTM A 328/A 328M. Sheet piling, including special fabricated sections, shall have the properties equivalent to those listed in Section 31 41 16.00 12, paragraph 2.1, “STEEL SHEET PILING”, at minimum and be of a design such that when in place they will be continuously interlocked throughout their entire length. Any PZ or PZC shape piling is acceptable. However, no more than 3 types of sections are permitted across the entire project and the sheet pile section shall be consistent within the reach. All sheet piling shall be provided with standard pulling holes located approximately 4 inches below the top of the pile, unless otherwise shown or directed. Steel sheet piling shall be hot rolled. The minimum thickness shall be 5/16-inch. Used sheets shall be cleaned per the requirements of SSPC-SP 7/NACE No.4, and then visually inspected for corrosion, damage, warping, bowing, etc. that would affect the installation and operability of the sheet pile wall. Thickness checks shall also be performed on 25% of the sheets randomly selected using ultrasonic methods or by direct measurement using calipers. Measurements shall be done 5-foot from the top and bottom and one at the approximate center. The pilings and measurement locations shall be selected by the Contracting Officer.

In addition to the 5/16-inch minimum thickness, an occasional maximum 1/8-inch pitting is permitted provided the net section thickness at the pitting location is a minimum of ¼-inch.”

SECTION 31 41 16.00 12

Page 168, paragraph 2.5 USED STEEL SHEET PILING. Delete this paragraph in its entirety.

SECTION 35 31 19

Page 6, paragraph 2.1.2 Riprap. Delete this paragraph in its entirety.

DRAWINGS

SHEET IDENTIFICATION Nos. S-505 & S-506. Delete these drawing in their entirety and substitute the attached revised drawing SHEET IDENTIFICATION Nos. S-505 & S-506 therefore.

H447693_S-505---.dgn 12/3/2012 5:34:30 PM

H447693_S-506---.dgn 12/7/2012 10:12:22 AM