NYC-WTC_000200206

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 Citv, NY 11101 Report Date: 10/10/01

ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fiber idsneification by Selected-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Spectroscopy (EDS) Method: AHERA Final Rule, E?A Federal Register (40 CFR, Part 763), Vol. 52, No. 210, October 30, 1987

Sample Idencificacior. ATxalvsis Parameters

Project/Site •. Murry Herqtraum H.3 Pearl Si,, NY, NY TEM Sample No.: 5650 - 637D6 Basement & Floors ; Date Received: 13/09/01 Grid Opening's Analyzed : 4

Project Sample No. : M3Kg-3>5- 10/9-14 Average Grid Opening: 10^•00 um

Air Volume: 1845 Total Arsa Analysed:0;04^0 mm2

Filter Type: MCE 25 mm diam., Pere 3 0.45 um Analytical Sensitivity Effective Arsa: 3 35 mtn2 0. 3046 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total, Struct. Filter Air Fibers Bundles Clusters Struct. S-rur’- J-Sum Struct mmO Struct'cc nam/mS

Cbrysotile Asbestos 0 0 0 c 0 0 0.0 0. 3000 0

Amphihcle Asbestos 0 □ 0 0 0.0 0. 30C0 0

AiTtbigucus 0 0 0 0 3 0 0.0 0. 30C0 0

Total asbestos (includes ambiguous structures) 0 0 0.0 0.3000 0

Non-Asbestos 0 0 0 0 0 0.0 0.oooo N/A No Tdent if icatior. 0 0 0 0 0 u 0.0 0.0000 N/A

Totals (All .ructurssj 0 0 0.0 0.0000 13/A TMe estimated uncertainty of this analysis is 1 standard deviation.

Non-asbestos fiber i.d. (SDS/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:

Marek Psysakhev Michael A,. Gorveki , Ph . D . Director of Electron Microscopy

CITY_21MC1OO_OO3266952

NYC-WTC_000200206