TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6479 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm-

GRIS) BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/27/02

.Analysis Performed By: ROMAN PEYSAKHOV

GC Structure Structure Type Length ID of Structure N or N EDS No >=05 p (Nonadb F B C M >=5)J j Chrys Amphibole Nonasb Ambig/ND ElemenS) Nc Coord <5p

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Struct - - !i.?u > 5:1 Aspect Ratio Grid acceptance: ■/=,Positive diffraction pattern properties conforming to <50% undissolved filler, overlapped or folded Totals laboratory ioentificalion criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% C I M I >6p ■/= EDS specirurii conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Ampliibole F = Single Fiber Amosite B = Bundle (<3 libers <1 fiber diameter apart ; Crocidolite Ambiguous C = Cluster (>3 Intersections) j Anthophyllite Non-Asbestos T remolite M = Matrix ' Actinolite Non-Identified NSD = No Smictures Detected

CONFIDENTIAL, CITY_21MC100_003467580 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180818