TEM Asbestos air sample results, NYC BOE, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 5827 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 20 Grid Opening Size: 0.01124 Client Sample #: 20 Area Examined: 0.04496 mm- GRID BOX: ^7 Magnification: 20,000 GRID ID: # Grid Openings: 4 Accelerating Voltage: 100 KeV

Analysis Performed By: ROMAN PEYSAKHOV

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

/ V/2. 77^ 2Y P J c a/

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance:

4= Positive diffraction pattern properties conforming to <50% und;ssolved 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 >5f 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES ■ i Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-Identified i Actinolite NSD = No Structures Detected .1.

CITY_21MC100_003106133

NYC-WTC_000185160