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 C. Patch masonry only when air and surface temperatures are between and 55 and 100 deg F (13 and 38 deg C) and are predicted to remain above 55 deg F (13 deg C) for at least 7 days after completion of work. On days when air temperature Is predicted •

to go above 90 deg F (32 deg C), schedule patching work to coincide with time that surface being patched will be in shade or during cooler morning hours.

D. Clean masonry surfaces only when air temperature is 40 deg F (4 deg C) and above and is predicted to remain so for at least 7 days after completion of cleaning.

1.8 SEQUENCING AND SCHEDULING

A. Order replacement materials at earliest possible date, to avoid delaying completion of the Work. B. Order sand for repointing mortar Immediately after approval of [Samples] [mockups]. Take delivery of and store at Project site a sufficient quantity of sand to complete Project. C. Perform masonry restoration work in the following sequence: 1. Re-anchor existing brick veneer to remain. 2. Replace/restore existing shelf angles and install flashing and weepholes at shelf angle locations. 3. Repair existing masonry, including replacing existing masonry with new masonry materials. 4. Clean, masonry surfaces. 5. Rake out joints that are to be repointed. •

6. Point mortar joints.

PART 2- PRODUCTS

2.1 MANUFACTURERS A. In other Part 2 articles where titles below introduce lists, the following requirements apply for product selection:

1. Available Products: Subject to compliance with requirements and approval by the Architect, products that may be incorporated into the Work include, but are not limited to, the products specified.

2.2 MASONRY MATERIALS

A. See specification in Section 04200 Unit Masonry

CLAY MASONRY RESTORATION AND CLEANING 04901 -5

NYC-WTC 000125172