NYC-WTC_000188962

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client \ame: NYC BOE Volume (liters): 1936 Lab Group #: 5897 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/15/01

Analysis Performed By: MICHAEL GORYCKI

GO. Structure Structure Type Length !D of structure N or N EDS (Nonadb No F B C >=05 u >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

xzc: aaq j 4

6

Struct = > 0.5)1 _> 5:1 Aspect Ratio Grid acceptance: a/ = 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 >5u a/^ EDS spectrum conforming to laboratory holes or opaque areas identification criteria observer! Chrysotile ; .AMPHIBOLES i Amphibole F = Single Fiber Amosite B = Bundle i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003083235

NYC-WTC_000188962