NYC-WTC_000200056

NYC 9/11 Public Portal Document

1 J lAYLOR ENVIRONMEMTAL GROUR INC. Stuyvesant High School Chambers Street, New York, NY SCA Project #:M477-15217, LLW#: 29881

Elevator Shaft(s) Cleaning and Testing Protocol

1. Prior to any cleaning work being performed inside the elevator shaft, each set of elevator doors on every floor ( not being used to access the elevator car and/or shaft ) shall be sealed with a loose diaphragm consisting of two layers of six- mil plastic sheeting sealed with tape.

2. A licensed elevator mechanic shall secure the elevator car at the highest elevation of the elevator shaft. The HVAC cleaning contractor shall clean the elevator pit area using wet methods and/or HEPA vacuum.

3. Under the supervision of a licensed elevator mechanic, the HVAC cleaning contractor shall clean all accessible interior surfaces of the elevator shaft and accessible exterior surfaces of the elevator car using wet methods and/or HEPA vacuum.

4. A visual inspection of all cleaned surfaces will be conducted to ensure they no n visible dust^ebris remain.

5. At the conclusion of a successful visual inspection, all accessible interior surfaces of the elevator shaft will be sealed with a clear-coat encapsulant.

6. The ceiling access hatch of the elevator car will be opened , and the car will G_.! ascend and descend the shaft a number of times. Two air samples will then be collected inside the elevator car to be analyzed for asbestos (TEM AH ERA) and airborne lead (NIOSH 7082).

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u , BOA JERICHO TPKE., FLORAL PARK, NY 11001- PHONE (516) 358-2955 ■ FAX (516) 358-1780

CITY_21MC100_001825037 NYC-WTC_000200056