NYC-WTC_000192453

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7525 Filter Type / Filter Area: MCE 385 Lab Sample#: 7 Grid Opening Size: 0.01124 Client Sample #: 7 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20 000 GRID ID: 2 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/24/02

Analysis Performed By: ROMAN PEYSAKHOV

• GO. Structure Structure Type Length ID of Stnjcture N or V EDS No (Nonadb . F B C M >=05 p '>=5(J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

-7^2 cl /

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties confomning to <50% undissolved filter, overiapped 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 '1- EDS spectrum conforming to laboratory holes or opaque areas identificationcrileria 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 Actinolite NSD = No Structures Detected

CITY_21MC100_003092725

NYC-WTC_000192453