TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name NYC BOE Volume (liters): 1936 Lab Group #: 8011 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: 6/8/02

Analysis Performed By: 7^ / ___________ ROMAN PEYSAKHOV

GO. structure Structure Type Length ID of Structure Nori EDS No (Nonadb F B C M >=05 p >=5iJ Chrys Amphibole Nonasb Ambig/ND bio Coord <5p Elements)

9 r a

Struct = >0.5u >5:1 Aspect Ratio Grid acceptance; >/= 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 >5p 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observe Chrysotile AMPHIBOLES Amphibole F = Single Fibe Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) i Anthophyllite Non-Asbestos ' Tremolite M = Matrix Non-ldentified NSD = No Structures Detected Actinolite __L

CITY_21MC100_0 03105480

NYC-WTC_000184697