TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NV’C BOE Volume (liters): 1944 Lab Group #: 6142 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 6 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/19/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v* EDS No >=05 pi Nonasb | Ambig/ND (Nonadb F B C ■=5p Chrys Amphibole No Coord i Elemerts)

ts <5p

Cf XL a

Strutt = > 0.5)1 > 5.1 .Aspect Ratio Grid acceptance; iG Positive diffraction pattern properties conforming to <50% Lindissolved filter, overlapped or folded Totals lahorstory identification chtena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B I C M >5p EDS spectrum conforming to laboratory holes or opaque areas Identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Delected

CITy_21MC100_003104901

NYC-WTC_000184285