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Asbestos air sampling results, New York City schools, Oct 2001

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Laboratory results for asbestos fiber analysis by TEM at a New York City high school collected on October 25, 2001.

NYC-WTC_000177614
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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 ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fibe:r 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 Stuyvesanu K.S., 345 Chambers St., NY, NY TEM Samule No.; 5766 62342 Exterior fc Interior of Building & Roof Date Received: 10/25/01 Grid Openings Analyzed:__4

Project Sample No■: -0 Average Grid Opening: 106.00 um

Air Velums: 1944 liters Total Area Analyzed: 0.0450 mm2

FiIter Ty^e: MCE 25 mm cian.. Pore Size: 0.45 urn Analytical Sensitivity: 22.2 s/mm2 Effective Are: : 385 mm2 C. 0 04 4 s/cc

FIBROUS PARTICULATES ANALYZE!. Number Observed CONCENTRATION Total Singl€; Matrix Total, struct. Filter Air Fibers, Bundles Clusters Struct. Struct >»5uni Struct/mm2 Struct/cc nqtn/m3

Chrysotile /isbescos 0 0 0 0 0 0 C.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 asbeistos (includes anbiguous structures) c 0 0.0 0.0000 0 Non-Asbest.os 0 0 0 0 0 0 0,0 0 .0000 N/A No Identification 0 0 0 0 □ 0 O.C' 0.0000 N/A

Totals (All Structures) 0 0 0.0 0.0000. N/A The estimcted 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;

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

CONFIDENTIAL, CITY_21MC100_003473354 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177614

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NYC-WTC_000177614Source: NYC Law Department, mirrored locally

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