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): 1960 Lab Group #: 5904 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: J) Grid Opening Size: 0 01124 Client Sample #: □ Area Examined: 0.04496 mm* GRID BOX: Magnification: 20,000 GRIDED: 5~< /> Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/17/01

Analysis Performed By: MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Stnrcture N or y EDS No (Nonadb F B C M =5p Chrys Amphiboie Nonasb Ambig/ND No ' Coord <5u Elements)

SC i' y77 J

Cl

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

CITY_21MC100_003106499

NYC-WTC_000185397