TEM asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 8178 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/19/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorV EDS No (Nonadb F B C M >=05 u ~ >=5p Chrys Amphibole Nonasb Ambig/ND . No 1 Coord <5m Elements)

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: -/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulale coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p ^/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile j AMPHIBOLES j Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO346168O SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179834