Management plan document, 30 Warren Street, January 2006

NYC 9/11 Public Portal Document

Regulatory Submittal Part I — Work Plan Fiterman Hall — 30 West Broadway, New York, New York Airtek Project 05-0867 — January 10, 2006

As described below, the piston effect of the elevators and their potential to expel interior air into the outside environment will be addressed through the installation of engineering controls, and the application of monitoring specific to this operation.

Engineering Controls: Elevator banks in the building currently vent pistoned air to the elevator machine rooms and then to the outside air through louvers. The forcing of air to the exterior of the building will be prevented by: 1) the installation of critical barriers (two layers 6-mil poly and plywood, caulked at the edges); 2) the opening of alternate vents at the top of the shafts to allow air to vent into the top floor of the building, and the installation of negative air filtration devices in that space to filter and control the vented air, 3); the reduction of elevator velocity to reduce the piston effect.

Monitoring: Air monitoring for asbestos (TEM) and Metals (NIOSH 7300) will be conducted on a daily basis at the exterior of the critical barriers for each elevator at the roof level. An airlock will be installed at the roof access point to allow a NYS Certified Asbestos Air Sample Technician to conduct monitoring. This testing will be in addition to the environmental community air monitoring described in the ECAMP.

5.0 Monitoring:

5.1 Personal Monitoring:

Each Contractor and Subcontractor accessing the site will conduct Personal Exposure Monitoring as required by OSHA. Requirements for monitoring will be established by each employer.

5.2 Work Area Monitoring:

Project monitoring and asbestos air sampling will be conducted throughout the Remediation Phase of the Project. Project Monitoring will be conducted in strict accordance with ICR 56, subsection 56-17 and any provisions set forth in the Variance Application. All sample analyses will be by TEM. Project air monitoring is further detailed in Regulatory Submittal Part II — Environmental Community Air Monitoring Plan.

5.3 Environmental Community Air Monitoring

Community Monitoring will be conducted as detailed in Regulatory Submittal Part II— Environmental Community Air Monitoring Plan.

6.0 Remediation Phase

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NYC-WTC 000096551