Air sampling protocol document, 130 Cedar Street, Jan 2005

NYC 9/11 Public Portal Document

130 Cedar Street July 15, 2004 Selective Demolition and Facade Restoration Koenen Associates

2. Verify that masonry may be completed in accordance with all pertinent codes, and regulations, the reference standards, and the briginal design.

3. Do not start any work until mock-ups are approved by the Architect.

B. Discrepancies

1. In the event of discrepancy, immediately notify the Architect.

2. Do not proceed with Installation In areas of discrepancy until all such discrepancies have been fully resolved.

3.02 COORDINATION

A. Carefully coordinate with all other trades to ensure proper and adequate interface of the work of other trades with the work of this section.

3.03 PREPARATION

A. Brick

1. Wet brick having ASTM C67 absorption rates greater than 0.025 oz. per square inch per minute.

2. Determine absorption by placing twenty (20) drops of water Inside a circle the size of a quarter on typical units. If water is absorbed within 1-1/2 minutes, wet brick before laying.

3. Use setting methods which ensure that each masonry unit is nearly saturated but surface dry when laid. During freezing weather, comply with the recommendations of BIA.

4. Except for absorbent units specified to be wetted, lay masonry units dry.

3.04 BRICK REMOVAL AND REPLACEMENT

A. Carefully remove by hand, at locations indicated, bricks that are damaged, spalled, or deteriorated. Cut out full units from joint to joint and in a manner to permit replacement with full- size units without damaging surrounding masonry.

B. Support and protect remaining masonry that surrounds removal area. Maintain flashing, reinforcement, lintels, and adjoining construction in an undamaged condition.

C. Salvage as many whole, undamaged bricks as possible.

D. Remove mortar, loose particles, and soil from salvaged brick by cleaning with brushes and water. Store brick for reuse.

E. Clean remaining brick at edges of removal areas by removing mortar, dust, and loose particles In preparation for replacement.

F. Install new or salvaged brick to replace removed brick. Fit replacement units into bonding and coursing pattern of existing brick. If cutting Is required, use a motor-driven saw designed to cut masonry with clean, sharp, unchipped edges.

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Unit Masonry 04200-5

NYC-WTC 000125162