TEM Asbestos air sample results, NYC BOE, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE 1936 Voluineflitersi: Lab Group #: 5820 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: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or T EDS No (Nonadb F B C M >^5p Chrys Amphibole Nonasb .Ambig/ND No Coord <5p Etementsl

7^^

Struct = > 0.5p >5:1 Aspect Ratto Grid acceptance: y = 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 unfolded or overlapped grid squares <5% F B 0 M EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Clarysotile rAMPHTOOm^ Amphibole F = Single Fiber i Amosite Ambiguous B = Bundle {<3 fibers <1 fiber diameter apart ‘ Crocidolite Anthophyllite ’ Non-Asbestos J_i C = Cluster (>3 intersections) j Tremolite M = Matrix I Non-Identified j Actinolite NSD = No Structures Detected i

CITY_21MC100_003106104

NYC-WTC_000185139