NYC-WTC_000177642

NYC 9/11 Public Portal Document

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

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: 10/05/01

ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fiber Identification ;iy Selected.-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Spectroscopy (EDS'; Method: A:1ERA Final Rule, F?.A Federal Register (40 CFR, Part 76 3), Vol. 52, No. 210, October 30.. 1987

Sample IdejiL-fication Analysis Parameters

Proj ect/Site. Stu'/vesant H.S., 345 Chambers .St., NY, NY TEM Samcle No.: 5605 60029 Floors 1-lQ Date Received: 10/05/31 Grid Openings Analysed:__ 4

Project Sample No. : SHS-1>1 C-10/5-21 Average Grid Opening: 106.00 um

A.ir Volume: Total Area Analyzed: 0.0450 mm2

Filter Tyi'e: MCE 2 5 mm diam., Pore Size: 0.45 um Analytical Sensitivity: ^2 2^2 s/nim2 Effective Area: 3 8 5 rnm2 0.0045 s/cc

FIBROUS PARTICUIATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct > = 5um Strucc/mm2 srruct/cc

Chrysotile Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Amphibole Asbestos 0 0 0 0 0 0 0.0 0.oooo 0

Ambiguous 0 0 0 0 0 0 0.0 0.0000 0

Total asbestos {Includes amiDiguous structures) 0 0 0.0 0 . 0000 0 Non-Asbestos 0 0 0 0 0 0 0.0 0.0000 N/.A No I de nt i f i c a t ion 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 o- 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_003473575 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177642