TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7444 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 .Area Examined: 0.04496 mm- GRID BOX: Ma2nification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/17/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 7 EDS I (Nonadb i No F B C M >=05 pi i •=5m Chrys Amphibole Nonasb Ambig/ND ■ No Coord <5p Elements) | ----------- 1

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Struct = > 0.5|j >5:1 Aspect Ratio Gnd acceptance: N = Positive diffraction oattern properties conforming to <50% undissolved filtet, owedapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B j C i M ! >5p v= ECS Spectrum conforminc to laboratory holes or opaque areas Identification criteria ooserved Ctirysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Buncle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster ;>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471111 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176952