NYC-WTC_000200215

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 WLAP 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 Energy-Dispersive X-RAY Spectroscopy (EDS) Method: AHSRA FiPxal Rule, E?A Federal Register (40 CFR, Part 753), Vol. 52, No. 210, October 3C, 1987

Sample Identification Analysis Parameters

Project/Site: P.£. ISOM. 143 Baxter St., NY, NY TEM Sample No.: 5126 61668 Throughout the School Building Date Received: iJ/ie/^ Grid Openings Analyzed;__ 4

Project Sample No.: 13 Average Grid Opening: 106.00 urn

Air Volume: 1859 Jit^ Total Area Analyzed: 0.0450 mm2

Filter CyToe: MCE 25 mrr. diam. , Pore Size: 3.45 urn Analytical Sensitivity: 22,.2 s/mm2 Effective Area :385 nim2 0.004S s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filler Air Fibers Bundles Clusters Struct. Struct > = 5um •Struct /tnmS Struct/cc ricrm/TnS

Chrysotile Asbestos 0 0 0 0 0 0 0.C 0.0000 0

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

Ambig-'aous 0 0 0 0 0 0 c.o 0.0000 0

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

Totals iAll Structures) 0 0 C.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 nhe 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 Eleccron Microscopy

CITY_21MC100_011274408

NYC-WTC_000200215