TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 6897 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: '5225 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/2/02

Analysis Performed By: rv ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS No >=05 p Amphibole Ambig/ND (Nonadb F B C >=5|j Chr/s Nonasb Elements) ) No Coord <5|j

U —Ji___ -i----- i- i I ft ---------- f

Struct = > 0.5p > 5:1 Aspect Ratio Gnd acceptance:

v'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5p 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria 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 Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102217

NYC-WTC_000183174