NYC-WTC_000200247

NYC 9/11 Public Portal Document i,

ATC Environmental, Inc. 104 East 25th Street New York, New York 1001 N.Y.C. Board of Education Approved N.Y. State ELA? #10875 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 11S7 Long Island City, NY 11101 Report Date; 10/05/01 ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fiber Identification by Selected-Area Electron Diffraction (SARD) and Energy-Cispersive X-RAY Spectroscopy (EDS) Method; AKERA Final Rule, EPA Federal Register (40 CFR, Part 763), Vol. S2, No. 210, October 30, 1387

Sanroreldentificacion Analysis Paramecers

Project/Site: W.S. for Economics ■£ Finance, 100, Trinity PI., NYC TEM Sample No.: 5606 60124 Entire Building Date Received: 10/04/^ Grid Openings Analyzed:__ 4

Projecc Sample No.: HSEF-S-10/3-46 Average Grid Openincr: 106.00 um

Air Volume: 1810 liters Total Area Analyzed: 0.0450 mm2

Filter Type; MCE 25 mm diam., Pore Site: Q.45 urn Analytxcal Sensitivity: 22.2 3/mm2 Effective Area: 385 mm2 0.0047 3/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct > = 5um Struct/mrn2 Struct/cc nam/m3

Chrysotile Asbestos ' 0 C 0 0 0 0 0.0 0.0000 0

Amphibole Asbestos 0 0 0 0 0 0 0.0- 0.0000 0

Ambiguous 0 0 0 0 0 0 0.0 0.0000 0

Total asbestos (includes ambiguous structures) 0 0 0.0 0,oooo 0

Non-Asbestos 0 0 0. 0 0 0 0.0 0.0000 N/A No Identification 0 0 0 0 0 0 0.0 0.0000 N/A

Totals (All Structures) .0 0 0.0 0.0000 N/A The estimated uncertainty of this analysis is 1 standard deviation.

Non-asbestos fiber i.d. (EDS/SAED); None detected Amphibole Asbestos Type: None detected The Analysis was carried out in accordance with the approved TEM method. This laboratory is in compliance with the quality specified for the method.

Analyzed by: Report Reviewed by:

Marek Peysakhov Michael A. Gorycki, Ph.D. Director of Electron Microscopy

CITY_21MC100_003267890 NYC-WTC_000200247