TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume /liters): 1944 Lab Group #: 5927 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/19/01

Analysis Performed By: /•l MICHAEL GORYCKI

GO, Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=05 U >=5p Chrys Amphibole Nonasb AmbigZND <5|j Elements)

T-ST A Z 3 ^7 4 Xr V N/f /uS

! ! !

i i l J;; Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance; N= Positive diffraciior 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 >5iJ ' A - 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 Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No .Structures Detected

CITY_21MC1OO_OO31O6597

NYC-WTC_000185463