NYC-WTC_000200208

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25tn 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 #1137 Long Island City, NY 11101 Report Date: 10/10/01

ASBESTOS FIBER AliALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM; With Fiber Identification by Ssleccsd-Area Eleacron 'raction (SAED) and Enercy-Dispersive X-RAY Spectroscopy (EES) Method: AHERA Final .Rule, ZPA Federal Register (40 CFR, Part 7fc'3), Vol, 52, No. 210, October 30, 1987

salable Identification Analysis Parameters

Project/Sice: Murrv Sergtraurr. H.S., 411 Pearl St., NY, NY TFM .Sample No. : 5650 - 50712 Easement & Floors 1-6 Date Received: 10/09-^01 Grid Openings Analysed:__ 4

Project Sample No.: NBHS-3>6-10/9-20 Average Grid Opening :10£;00 j^

Air Volume: 133c Total Area Analysed:0;^£50 rin^

.ter Type: MCE 25 aim diam. . Pere Size: 0.45 urn Analytical Sensitivity; 2■2 5/1111:12

EtZ' xive Area: 38E mm2 0.0C47 s/cc -

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTPATION Total Single Matrix Total. Struct. EiIter Air Fibers Bundles Clusters Struct Sf > = 5U1T. Struct mm2 Struct/cc ncir./m3

Chrysotile Asbestos' 0 0 0 0 0 0 0. 0 0.ocoo 0

Amphibole Asbestos 0 0 0 0 0 0 0.0 0.0000 .0

Ambiguous 0 0 0 0 c 0.c 0,0000 0

Total asbestos (includes ambiguous structures) 0 0 0.0 C . 0000 0 Non-Asnestos C c 0 G u 0.C 0 .0000 H/A No Identification c c • c G C 0 0.0 0.0000 K/A

Totals (All Structures! C 0 0.0 0 . COOO 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 our in accordance with the approved TEM method. This laboratory is in compliance with the quality specified for the method.

Analysed by: Report Reviewed by:

Marek Pevsakhov Michael .A. Gorycki , Ph . D . Director of Electron Microscopy

CITY_21MC1OO_OO3266957

NYC-WTC_000200208