NYC-WTC_000188695

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 ELAP #10879 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1187 Long Island City, NY 11101 Report Date: 10/25/01

ASBESTOS FIBER TkNALYSIS BY TR7VNSMISSION ELECTRON MICROSCOPY (TEM) with Fiber Identification by Selected-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Spectroscopy (EDS) Method: AHERA Pinal Rule, EPA Federal Register (40 CFR, Parc 7631, Vol. 52, No. 210, October 30, 1987

Sample Identification Analysis Parameters

Project/Site; New Stuyvesant H.5., 345 Chambers St., NY, NY TEM Samnle No.: 5758 62145 Exterior & Interior of Building & Roof Date Received: 10/242^ Grid Openings Analyzed:__ 4

Pi-oject Sample No. : 9 Average Grid Opening; 106.00 urn

Air Volume: 1928 libers Total Area Analyzed: 0.0450 mt,2

Fxlter Type: MCE 25 mm diam. Pore Size: 0.45 urn Analytical Sensit ivity ; J^^2 s/mm2 Effective Area: 385 mm2 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 nqm/mS

Chrysotile Asbestos 0 0 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 0.0000 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:

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

CITY_21MC100_003082604

NYC-WTC_000188695