110 WILLIAM STREET Block: 77 Lot: 8 BIN: 1001186 69-81 John Street

NYC 9/11 Public Portal Document _02/22(2002_12:20 FAX 212 267 2139 TrizecHahn l003

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:vld. Sam pesci TrizecHahn Oftice Properties 1 I 0 William Street New York, NY 10007

Re: 1 i t) William Strcrt Ambient Project #211382

Dear Mr. Pesr-i:

'!'he following is a summary of the TEM air sample analysis perfcrmed by Ambient Group, Inc. un ScpIc T b$.t 21, 2001 at the ab!. c rcforenced location.

Eievcn ( i 1) air samples were cotlectcd from —arious locations un i'laor. ?, t, 9, 11, 12, 1 . 16, 13, 25, 27 and 31 and analyzed by transrstission electron microscopy (TEM) for asbestos structures. The results of the analysis indicated that 1iirborne asbestos levels at the time of testing were less than the analy7ical sensitivity ,of the inst urrtent, as well as well below the EPA standard of 70 structures/rrim and other recommended industry ,guidelines and?vr regulations.

Should you have any questions regarding this inionriatkm. plcasc feel free to call me.

Sincerely. Sitr,n,sd for Ambicn~ r 'rove. me. by: f4

Michacl Eorelio, Director or Labcratory QpZndons

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