TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE VolumeJIitersl: 1840 Lab Group #: 7521 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496 mm-

GRID BOX: /HA Magnification: 20,000 GRID ID: E25 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4,'24,02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND ,,>5 1 No Coord <5p Elements)

/PH SI is / v Z-t

/45—

I i ! Struct = > 0.5p > 5.1 -Aspect Ratio Grid acceptance: v = Positive diffraction pattern properties conforming to ^^0% undissolved filter, ovedapped or folded Totals 10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% B I C i M , >5p EDS spectrum conlorming to laboratory holes or opaque areas El Chrysotile 1 --- 1---- ----- i----- laentification criteria observec AMPHIBOLES Amphibole | - = Single Fiber Amosite 3 = Bundle l<3 fibers <1 liber diameter apart Crocidolite Ambiguous j C = Cluster !>3 Intersections! Anthoptiyllite Non-Asbestos j Tremolite M = Matrix Non-Ideiitified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03471260 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177059