NYC-WTC_000226328

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client .Name: NYC BOE Volume (liters): 1810 Lab Group #: 6375 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 GridOpeninoSi^ 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/19/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure ' Structure Type Length ID of Structure N or y EDS (Nonadb No F B C M >=05 M Chrys Amphibole Nonasb ) Ambig/ND No Coord <5tJ Elements)

/ -r ~

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: -1= 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 untoloed or overlapped grid squares <5% F B C M >5tJ EDS spectrum conlorming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crccidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Noil-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002922291

NYC-WTC_000226328