NYC-WTC_000197309

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7206 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/25/02

Analysis Performed By: ROMAN PEYSAKHOV

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

A 5^2 If _ d__

56^

Struct = > 0.5u >5:1 Aspect Ratio Grid acceptance; 7= 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 >5|j 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed 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 i.,,. NSD = No Structures Detected

CITY_21MC100_0 03044759

NYC-WTC_000197309