NYC-WTC_000194700

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7891 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. / Structure Structure Type Length ID of structure Norv EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND <5p Elements)

-

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: ^= Positive diffraction pattern properties conforming to <50% undissoNed 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 >5m '/= 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 Tremolite M = Matrix Non-Identified Acbnolite NSD = No Structures Defected

CITY_21MC100_0 03096656

NYC-WTC_000194700