NYC-WTC_000190422

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 7316 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 8 Area Examined: 0,04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/3/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No [Nonadb F B C M >=05 M :>=5p Chrys Amphibole Nonasb Ambig/NO ; No ] Coord <5u Elements) i \....... . .. I±.

<r

..

Struct = > 0.5)1 >5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissolved fitter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5m identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos Tremolite M - Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003089320

NYC-WTC_000190422