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 Reconstruction Koenen Associates

1. Apply shop prime coat immediately after cleaning metal. Apply paint in dry weather or under cover. Metal surfaces shall be free from frost or moisture when painted. Paint all metal surfaces including edges, joints, holes, comers, etc.

2. Paint surfaces which will be concealed after shop assembly prior to such assembly. Apply paint in accordance with approved paint Manufacturer's printed instructions, and the use of any thinners, adulterants or admixtures shall be only as stated In said instructions.

3. Paint shall uniformly and completely cover the metal surfaces, 2.0 mils minimum dry film thickness. No work shall be shipped until the shop prime coat thereon has dried.

D. Touch-Up: In the shop, after assembly and In the field, after installation of work of this Section, touch-up damaged or abraded portions of shop prime paint with specified ferrous metal primer.

E. Apply one shop coat to fabricated metal items, except apply two (2) coats of paint to surfaces inaccessible after assembly or erection. Change color of second coat to distinguish it from the first.

2.03 GALVANIZING

A. Scope: All ferrous metal exposed to the weather, and all ferrous metals indicated on drawings or in specifications to be galvanized, shall be cleaned and then hot-dipped galvanized after fabrication.

B. Cleaning: Thoroughly clean metal surfaces of all mill scale, rust dirt, grease, oil, moisture and other contaminants prior to galvanizing.

C. Application: Hot-dip galvanizing shall be applied in accordance with:

1. ASTM A123: Standard specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products.

2. ASTM Al 53: Galvanized Coating on Iron and Steel Hardware - Table 1.

3. ASTM A446: Galvanized Coating on Steel Sheets.

4. Minimum weight of galvanized coating shall be two (2) oz. per square foot of surface.

D. Fabricate joints which will be exposed to weather in a manner to exclude water or provide weep holes where water may accumulate.

E. All galvanized materials must be Inspected for compliance with these specifications and marked with a stamp indicating the name of the galvanizer, the weight of the coating, and the appropriate ASTM number.

F. To minimize surface Imperfection (e.g.: flux Inclusions), material to be galvanized shall be dipped Into a solution of Zinc Ammonium Chloride (pre-flux) immediately prior to galvanizing. The type of galvanizing process utilizing a flux blanket overlaying the molten zinc will not be permitted.

Miscellaneous Metals 05500-4

NYC-WTC 000125186