TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEMAsbestosjfairlCoiinjLSh^et Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6401 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 1 Grid Opening Size: 0.01124

Client Sample #: 1 Area Examined: 0.04496 mm'

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/22/02

Analysis Performed By: MARK PEYSAKHOV

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

i I I )

I I i I I Struct = > 0.5g > 5:1 Aspect Ratio Gnd acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obsewed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <6% F BjC M >5u V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467438 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180723