NYC-WTC_000200204

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 1C4 East 25th Street New York, New York 10010

N.Y.C. Board of Education Approved N.Y. State ELAP #10579 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1137 Long Island City, NY 11101 Report Date: 10/10/01

ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) with Fiber Idsncificaiion ty SeiecEsd-Area Eiectror. DiffracEion (SAEDI and Energy-Dispersive X-RAY SpecEroscapy (EDS) Method: AHERA rinal Rule, SPA Federal Register (40 CFR, Part 763), Vol. , No. 210, October 3C, 19€7

sample idenciL. Analysis Parameters

Proj ect/Site: Mu: BeratrauTi H.S-, 411 Psarl St., NY, NY TEM Sample No.; 5660 60695

b.asement 1 "loors 1-6 Date Received Grid Openings Analyzed:__ 4

Project sample No.: y.BHS-5>6 -1C ^9 - Q6 Average Grid Opening; 106.PC um

Air Volume: Total Area Analyzed: 0.0450 mm2

Filter Type: MGE 25 rr.m di am ize: 0.45 um Analytical Sensitivi s/nim2 :tIve Area; 3S5 inmO 0.0046 Sz'^cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Bundles Clusters Struct. Struct > = 5um not /iini2 Struct/cc nqm/m3

Chrysotile Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Amphibole Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Ambiguous 0 0 0 0 0 0 0.0 0.0000 0

Total asbestos (includes amblgtous structures) 0 0 0.0 0.0000 0 Non-Asbestos 0 0 0 0 0 0 0.0 0.0000 N/A No Tdentificaticn 0 0 0 0 0 0 0 0.0000 N/A

Totals (All Structures) 0 0 0 0.0000 N/A Ths estimated uncertainty of this analysis is i standard deviation.

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

The Anslysis was carried out in accordance with the approved TEM method. This laboratory rs rn compliance with the quality specified for the method.

Analysed by; Report Reviewed by:

Marek Reyssk: Michael A. Gorvcki, Ph.D. Directo P"' tron -Microscopy

CITY_21MC100_003266946

NYC-WTC_000200204