Asbestos bulk sample analysis summary, 225 Liberty Street, 2001-2002

NYC 9/11 Public Portal Document

GPS Environmental Consultants, Inc.

The east side of the facility, where windows were broken and gross material entered was separated from the rest of the floor by polyethylene isolation barriers. Negative air machine were installed to assist in controlling fiber release from the east side. Cleanup work on both the east and west side of the facility was performed by a licensed Asbestos Abatement Contractor utilizing certified asbestos handlers and supervisors. GPS Environmental, a licensed Asbestos Consulting firm, performed asbestos air sampling. Sampling was performed during each phase of the cleanup operation and at the conclusion of each phase post/final asbestos air sampling was performed.

Pinnacle Environmental Corporation, a NYS Licensed Asbestos Abatement Company, located at 64-54 Maurice Avenue, Maspeth, New York, performed all Phase 1 abatement activities. Pinnacle personnel included only New York State Department of Labor (NYSDOL) and NYCDEP certified supervisors and asbestos handlers. BMS Catastrophe, a disaster recovery firm, performed phase II cleaning operations under the review of GPS Environmental. The procedures for each cleaning phase is briefly outlined below:

Phase I was conducted so that an acceptable environment could be obtained for limited access of essential personnel to seal open windows, assess damage to equipment, inventory items to be disposed of, etc. Phase one was conducted as an asbestos abatement project on the east side of the building where gross debris entered the facility through broken windows. GPS was the "Third Party" Asbestos Air Sampling Consultant for this aspect of the project as required by NYC and NYS asbestos regulations. On the west side of the facility and where only dust was present asbestos abatement personnel cleaned using asbestos specific procedures.

Phase II involved a fine, detailed cleaning of the facility from the Penthouse to level C3. BMS Catastrophe, a worldwide disaster recovery firm, utilizing asbestos abatement personnel performed the fine cleaning. BMS was employed directly by Merrill and managed under- a management agreement by GPS Environmental.

Phase III Procedure Overview — The ventilation ductwork was inspected by a trained HVAC specialist employed by Tri Dim Corporation on October 19, 2001. Areas determined to be contaminated were cleaned by a certified duct-cleaning firm, Kasco. Following cleaning of the ductwork, all compartment units were activated after filters were placed in all supply grilles by BMS personnel. GPS conducted continuous asbestos air sampling for each floor for a 24-48 hour period to ensure that airborne fiber concentration levels were not exceeded due to missed contaminates within the local ductwork. Once the fresh air intake ducts were cleaned and a new filtration system in place, both the upper and lower fresh air fans were turned on. As a measure to ensure a safe environment for all occupants, GPS conducted continuous asbestos air sampling for each floor as the compartment units and fresh air fans ran for a 24- 48 hour period.

Merrill Lynch, World Financial Center, South Tower, 225 Liberty Street, New York, NY Pace i

NYC-WTC 000097299