TEM air analysis report, Oct 16 2001

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 # 118 7. Long Island City, NY 11101 Report Date: 10/16/01

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, Part 763), Vol. 52, No. 210, October 30, 1987

Sample Identification Analysis Parameters

. Project/Site: New Stuyvesant H.S., 345 Chambers St., NY, NY TEM' Sample No.: 5698 - 61342 Exterior & Interior of Building & Roof Date Received Grid Openings Analyzed:__ 4

Project Sample No.: NSHS-EIR-10/15-09 Average Grid Opening: 10 6.00 um

Air Volume: 1908 liters Total Area Analyzed: 0.0450 mm2

Filter Type: MCE 25 mm diam. Pore Size: 0.45 um Analytical Sensitivity:^22^2 s/rnm2 Effective Area: 385 mni2 0,0045 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 nam/m3

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:

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

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