NYC-WTC_000215508

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume /liters): 1848 Lab Group #: 6800 Filter Type / Filter Area: MCE 385 Lab Sample #: 12 Grid Opening Size: 0.01124 . Client Sample #: 15 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRlblb: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nory EDS No (Nonadb F B C >=05 p >=5(j Ctirys Amphibole Nonasb Ambig/ND //O’ Coord <5p. Elements)

tz EES 5S ----- ■ 4

Struct = > 0.5p .>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 4= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ■ i AMPHIBOLY Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart ' Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite. , Non-Asbestos Tremolite , ; M = Matrix Noii-Identified Actinolite NSD.= No Structures Detected

CITY_21MC100_002872471

NYC-WTC_000215508