TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

•r TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7291 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: J Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 mm- GRID BOX: GRID ID: w Magnification; Accelerating Voltage: 20,000 100 KeV # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or V EDS i No (Nonadb i F B C M >=05 M >=5|j Chrys Amphibole Nonasb Ambig/ND Elements) No Coord <5pi

IL a c

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Struct = > OUp > 5:1 Aspect Ratio Grid acceptance: \ = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% f I F ! B ’ C 1 M ; >5u \ = EDS soectrum conforming to laboratory holes or opaque areas loentificaiion criteria observed Chivsottle i AMPHIBOLES Amphibole F = Single Fiber Amosite B = Eunole .<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster >2 intersections! Anthophyllite Non-Asbestos Tremolite i M = f/latrix Actinolite ■ Non-Identified i _L NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470755 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176715