Asbestos air sample data sheet, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6492 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sanaple #: 14 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/28/02

Analysis Performed By; MARKPEYSAKHOV

GO. Structure Structure Type Length IDofStrucfijre N or EDS No (Nonadb F B C M >=05 p >=5(j Chrys Amphibole Nonasb Ambig/ND No Cooid <5p 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% partioulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsenred Chrysotile AMPHIBOLES 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 Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471664 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177237