TEM asbestos air sample results, NYC BOE, Jun 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1944 Lab Group #: 8121 Filter Type / Filter Area: MCE 385 Lab Sample #: 1 Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/15/02 Analysis Performed By: /\/i

ROMAN PEYSAKHOV t Jr GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

5g t __4

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: ^1- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >51J EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsenzed 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 j M = Matrix Actinolite i Non-ldentified NSD = No Structures Detected ___________ !

CITY_21MC100_003105683

NYC-WTC_000184848