NYC-WTC_000224827

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client .Name: NYC BOE VobimeJIitersl: 1920 t Lab Group #: 7352 Filter Type / Filter .Area: MCE 3S5 mm- Lab Sample 6 Grid Opening Size: 0.01124

Client Sample #: 06 Area Examined: 0.04496 mm’

GRID BOX: Magnification: 20,000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 ■Analysis Date: 4/7/02

Analysis Performed By: MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Structure N or 7 EOS No (Nonadb B C M >=05 M Chrys Amphibole Nonasb Ambig/NO No Coord <5u Elemenis)

I

7A-----

Struct = > 0.5)1 >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 leas: 20 unfolded or overlapped grid squares <5% F B ’ C 1 ,M i >5u v- EDS spectrum conforming to laboratory holes or opaque areas Chrysotile identification criteria observed AMPHIBOLES “I r~ Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ■Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-ldentibcd 1 I 7 NSD = No Structures Oetected

CITY_21MC100_002894694

NYC-WTC_000224827