NYC-WTC_000200240

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street New York, New York 10010 N.Y.C. Board of Education Approved N.Y. State ELA? #10373 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 (SAED) and Energy-Dispersive X-RAY Spectroscopy (EDS) Method: AHERA Final Rule. EPA Federal Register (40 CFR, Parc 763). Vol. 52. No. 210, October 30, 1987

Sample Idencificacicn Analysis Parameters

Project/Site: H.S. for Economics & Finance, lOQ Trinity Pl., NYC TEM Sample No.: 5606 S0085 Entire Building Date Received: 10/04/01 Grid Openings Analyzed:__ 4

Project Sample No. JJSEFxE^loZ^^ Average Grid Opening: 106.00 um

Air Volume: 1810 liters Total Area Analyzed: 0.0450 mmS

Filter Type; MCE 25 mm diatn.. Pore Size: 0.43 um Analytical Sensitivity:22;2 s2mnj2 Effective Area: 385 tnrn2 0 ■ 0C47 a/cc

FIBROUS PA-RTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct 5 = 5um 3truct/mm2 Struct/cc nqm /mJ

Chrysotile Asbestos 0 1 0 0 1 1 22.2 0.0047

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) 1 1 22.2 0.0047 ISd Non-Asbestos 0 0 0 0 0 Q O.Q 0.0000 N/A No Ident i t i cat ion 0 0 0 0 Q 0 0.0 0.0000 N/A

Totals (All Structures) 1 1 22.2 0.0047 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 Psysakhov Michael A. Gorycki, Ph.D. Director of Electron Microscopy

CITY_21MC100_003267852 NYC-WTC_000200240