Asbestos cleanup procedures and air sampling report, GPS Environmental Consultants,

NYC 9/11 Public Portal Document

JAN-28-2002 04:50 MERRILL LYNCH 212 236 2301 P.03/06

GPS GPS Environmental Consultants, Inc. 31 Trescott Path Fort Salonga, New York 11768 Phone: (631) 269-4205, Fax: 269-9527 e-mail cps cnvironnicntalfglnun.coni

January 23,2002

Anthony Ponzo Merrill Lynch WFC North Tower 250 Vesey Street. NY, NY Re: Nomura Occupied floors 17-22 - Asbestos Cleanup Procedures & Air Sampling Results for the Cleanup of the WTC disaster - 2 World Financial Center, South Tower

Tony; As requested, enclosed herein is a summary of the cleanup protocols used at the 2 WFC, South Tower.

Due to the complexities of the project it was necessary to divide the cleanup into three phases. Phase 1,11 & III procedures are described in detail below. Phase I and Phase II procedures described below have been completed for Nomura occupied floors 17'22. All cleanup phases were conducted by trained, certified asbestos handlers and supervisors. GPS Environmental Consultants, Inc., a licensed asbestos consulting firm, monitored work activities and conducted asbestos air sampling during the three phased cleanup procedure. Asbestos air sampling was conducted during the performance of each cleanup phase. Post/Final asbestos air sampling was conducted at the conclusion of each phase. All Post/Final sample analyses results were required to be below 0.01 f7cc for Phase Contrast Microscopy (PCM) analysis and less than 70 Structures/mm2 for Transmission Electron Microscopy (TEM) analysis which is acceptable for re-occupancy in accordance with Federal, State and NYC Asbestos regulations.

Bulk Sample Collection and General Cleanup Criteria: A NYC Investigator collected IS bulk samples from representative floors on tlie east side of the facility where windows were broken and bulk/gross debris was observed. The samples were analyzed using the PLM, (polarized light Microscopy) analytical technique. Three Samples on three separate floors had results of asbestos present in amounts greater tlian 1%. Based on tliesc results all bulk/gross material was treated as asbestos containing material, (ACM). The east side of facility from the street level through floor 22 was most heavily damaged with many broken windows and large amounts of debris, Floor 23 and above exhibited much Jess damage having fewer broken windows.

Prepared by OPS Environmental Consultants, Inc Pg I of 4

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