NYC-WTC_000200214

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street New York, New York 10010

N.Y.C. Board of Education Aoproved N.Y. State ELAP #10879 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1187 Long Island City, NY 11101 Report Date: 10/19/01

ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) Kith Fiber Identification by Selectec-Arsa Electron Diffraction (.5AED, ar-d Energy-Dispersive X-RA.y Spectroscopy (EDS) Method: AH2RA Final Fule, EPA Federal /Register (40 CFR, Part 763), Vol. 52, No, 21C, October 30, 1967

Sample Identification Analysts Parameters

Project/Site: P.S. 150M, 143 Baxter St.. NY, KY TEM Sample No.: 5726 Throughout the School Building Date Received:^2O/2EV£1 Grid Openings Analyzed;__4

Project Sample No.: 05 Average Grid Opening; I06.QC nm

Air Vclume; 1908 liters Total Area Analyzed; 0.0450 rnni2

Filter Tinoe: MCE 25 mm diam. Site: 0.45 uin Analytical Sensitivity Effective Area-. 585 n-2 C .004.5 s/cc

FIBROUS PARTICULATES ANALYZED .Nuntber Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. .Struct >-Sum Struct/Tnm2 Struct/cc nam/n5

Chrysotile .Asbestos 0 C D 0 C 0 0.0 0.0000 0

Amphibole Asbestos 0 0 0 0 C 0 C.0 0.0000 0

Ambiguous 0 0 0 0 0 0 c.o 0.0000 0

Total asbestos (includes ambiguous structures} 0 0 c.o 0.0000 0 Non-Asbestos 0 0 0 0 C 0 0.0 0.0000 N/A No Identification 0 0 0 0 0 c 0.0 0.0000 N/A

Totals (All Structures) 0 c o.c 0.0000 N/A The estimiatec uncertainty of this analysis is 1 standard deviation.

Non-asbestos fiber i.d. (EDS/SAED); None detected Amphibole Asbestos Type: None detecred

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, nh. n. Director of Electron Microscopy

CITY_21MC100_011274400

NYC-WTC_000200214