Air sampling protocol document, 130 Cedar Street, Jan 2005

NYC 9/11 Public Portal Document

130 Cedar Street July 15, 2004 Selective Demolition and Façade Restoration Koenen Associates a. ProSoCo; [Sure Klean Heavy-Duty Restoration Cleaner] [Sure Klean 1028 Restoration Cleaner] [or] [Sure Klean Restoration Cleaner].

I. Two-Part Chemical Cleaner: Manufacturer's standard system consisting of potassium or sodium hydroxide based, alkaline prewash cleaner and acidic afterwash cleaner that does not contain hydrofluoric acid.

1. Products: a. ProSoCo; Sure Wean 766 Limestone & Masonry Prewash and Afterwash.

2.5 MISCELLANEOUS MATERIALS A. Masonry Patching Compound: Factory-mixed cementitious product that is custom manufactured for patching masonry, is vapor- and water permeable, exhibits low shrinkage, and develops high bond strength to all types of masonry. 1. Formulate patching compound used for patching brick in colors and textures to match brick being patched. Provide [number of colors needed] [not less than three colors] to enable matching each brick. 2. Formulate patching compound used for patching unglazed terra cotta in colors and textures to match terra cotta being patched. 3. [Available ]Products:

a. Cathedral Stone Products, Inc.; Jahn Restoration Mortar. b. Edison Coatings, Inc.; Custom System 45. c. <Insert manufacturer's name; product name or designation.> B. Masonry Repair Anchors, Expansion Type: Mechanical fasteners designed for masonry veneer stabilization consisting of 1/4-inch- (6-mm-) diameter, Type 304 stainless-steel rod with brass expanding shells at each end and water-shedding washer in the middle. Expanding shells shall be designed to provide positive mechanical anchorage to veneer on one end and backup masonry on the other. 1. [Available ]Products:

a. Dur-O-Wal, a Dayton Superior Company; Mechanical Repair Anchors. b. Hohmann & Barnard, Inc.; #521 RA Repair/Restoration Anchor. c. <Insert manufacturers name; product name or designation.>

C. Masonry Repair Anchors, Spiral Type: Type 304 stainless-steel spiral rods designed to anchor to backing and veneer. Anchors are flexible in plane of veneer but rigid perpendicular to it.

1. Provide adhesive-installed anchors complete with manufacturer's standard epoxy adhesive and injection tubes, screens, sleeves, or other devices required for installation. 2. Provide driven-in anchors designed to be installed in drilled holes and relying on screw effect rather than adhesive to secure them to backup and veneer.

CLAY MASONRY RESTORATION AND CLEANING 04901 -7

NYC-WTC 000125174