NYC-WTC_000188707

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street New York, New York 19010

N.Y.C. Board of Education Approved N.Y. State ELAP #10879 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1187 Long Island City, NY 11101 Report Date: 10/27/01

ASBESTOS FIBER 7\NALYSIS BY TRTINSMISSION 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, Part 763», Vol. 52. No. 210, October 30, 1987

Sample Identification Analysis Parameters

Project/Sit€: Neu- Stuyvesant R. S • , 34 5 Chambers St., NY, NY TEM Sample No.; 5775 62371 Exterior & Interior of Building &. Roof Date Received: 1^/26/^ Grid Openings Analyzed;__ 4

Project Sample Average Grid Opening ;l O6 A00 um

Air Volume: 1928 liters Total Area Analyzed ;0;0£50 mm2

Filter Type: MCE 2S mm diam.,Pore Size: 0.45 urn Analytical Sensitivity: 22.2 s/mm2 Effective Area: 3 85 rnm2 0.0044 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed. CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct >:=5um Struct/mm2 Struct/cc ngm/m3

Chrysotile Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Amphibole Asbestos 0 0 C 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 C.0 0.0000 N/A No Identification 0 0 0 0 0 0 0.0 0.0000 N/A

Totals (All Structures) 0 0 O'. 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

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NYC-WTC_000188707