NYC-WTC_000226008

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944. Lab Group #: 6280 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 21 Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/8/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v/ EDS No (Nonadb F B C M ■ >=05M J- >=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5m , Elements)

/ Vz K 4’

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: >1= Positive diffraction pattern procertes conforming to ' "5°% undissolved Alter, 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 >5p EDS spectrum conforming to laboratory' holes or opaque areas identification criteria observed Chrysotile ■ AMPHIBOLES j Amphibole F = Single Fiber I Amosite I ■

B = Bundle (<3 fibers <1 fiber diameter apart i Crocidolite Ambiguous C = Cluster (>3 Intersections) I Anthophyllite- Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_2IMCl00_000622836 NYC-WTC_000226008