NYC-WTC_000225825

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 6208 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 18 Grid Opening Size: 0.01124

Client Sample #: 18 Area Examined: 0.04496 mm^

GRID BOX: -7/ Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/27/01

Analysis Performed By: fip ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS No. (Nonadb F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements) ~r // /I

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: x/= 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 ^= 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- I Non-Asbestos Tremolite j M = Matrix Non-Identified Actinolite NSD = No Structures Delected

CITY_21MC100_000622556 NYC-WTC_000225825