TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

XEMAsbestos(air)CouiltSJie^ Client Name: NYC BOE Volume (liters): 1832 Lab Group #: 7577 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 5 Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.04496 mm^

GRID BOX- Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/29/02

Analysis Performed By: / Vl ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C M >=05 (J >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

7/^ g ft) zL 17^ ifi

Zii —

j Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: Z Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory dentification critena observed 10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5|j EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile amphiboles"' Amphibole F = Single Fiber Amosite 8 = 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

CITY_21MC1OO_OO31O216O

NYC-WTC_000183135