TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client ISame: NYC BOE Volume (liters): 1936 Lab Group #: 6208 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: 525 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/27/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure N or A EDS (Nonadb No B C M >=05 u >=5(j Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <6p

if ii

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

N= 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 unfoloed or ovedapped grid squares <5% F ‘ B C M >5p 7= EDS spectrum conlorming to laboratory holes or opaque areas identification criteria observed Chrysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 intersections) Anthophyllite j Non-Asbestos Tremolite I M = Matrix Actinolite ' Non-Identified NSD = No Structures Detected

CITY_21MC100_003105138

NYC-WTC_000184452