TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6409 Filter Type / Filter Area: MCE ' SSSmm^ Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/23/02

Analysis Performed By: MARKPEYSAKHOV

GO. Structure Structure Type Length ID of Structure -Nor Y EDS (Nonadb No F B C M >=05 p I >=5pi > Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <51J

I I ' 1 “

■ ' ' i II I I Struct - > 3.5Li > 5:! Aspect Ratio ■ Grid acceptance; Positive diffraction pattern properties conforming to "50.% undissolved filter, overlapped or folded Totals laboratop' identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B i C M >5p EDS spectrum conforming to laboraton/ holes or opaque areas identification criteria observed Chrysotile -/amphiboles Amphibole '. F = Single Fiber Amosite ; B = Bundle (<3 fibers <1 fiber ciameter apart Crocidolite Ambiguous C = Cluster-(>3 Intersections) Anthophyllite ) Non-Asbestos I Tremolite i M = Matrix Actinolite I Non-Identified NSD = No Structures Detected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660217

NYC-WTC_000174780