TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 6208 FilterJN2L£FUleLAreai^ MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 6 Area Examined: 0.04496

GRID BOX: Magnification: 20.000 GRID ID: 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 Nor v EDS No (Nonadb F B C M >=5|j Chrys Amphibole Nonasb Ambig/ND Elements) zq No Coord i <5|j

I 7Pz I;

A £ SiiCNgZE .A

EZ

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

Positive diffraction pattern properties confonriing 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% I F i B C M >5u y= EDS spectrum coniorming to laboratory holes or opaque areas - Identification cnterla observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bunole (<3 fibers <: fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Noil-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003105133

NYC-WTC_000184447