NYC-WTC_000200216

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 SLAP #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) With Fiber Identification by Selected-Area Electron Diffraction (SAED) and Ensrgy-Dispersive X-RAY Spectroscopy (EDS) Method; AHERA Final Rule, EPA Federal Register (40 CFR, Part 763), Vol. 52, No. 210, October 30, 1967

Sample Identificaticn Analysis Parameters

Froject/Site; P 130M, 143 Baxter St., KY,.NY TEM Sample No.: 5725 - 61674 Throughout the School Fuildinq Date Received: 10-18/01 Grid Openings Analyzed:_ 4

Project Semple No. : 19 Average Grid Opening: 105.00 urn

Air Volume :^^^072Aters Dotal Area Analyzed: C.045C mm2

Filter Ti'P-e: MCE 25 mm diam. , Pore Site: 0.45 urn Analytical Sensitivity: 22.2 s/nim2 Effective Area: 365 mm2 C.004E

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct, Filter Air Fibers Bundles Clusters Struct. Struct Strvct/nm2 nom/mS

Chrysotile Asbestos 0 0 0 0 0 0 0.0 0 .OODO 0

Amphibcle Asbestos 0 0 0 0 0 0 0 .0 0 .OODO 0

Ambiguous 0 D 0 0 0 0 0.c 0.0000 0

Total asbestos (includes ambiguous structures) 0 0 0.0 0.OODO 0 Non-A.sbestos 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 G.0 0 . OODO 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 TSM method. This laboratory is in compliance with the quality specified fox" the method.

Analyzed by; Report Reviewed by:

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

CITY_21MC100_011274423

NYC-WTC_000200216