TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE yolumejjitersh 1816 Lab Group #: 6887 Filter Type / Filter Area: MCL 385 mnr Lab Sample #: 16 GlidOneningSize: 0.01124

Client Sample #: 19 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDJD: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3,1/02

Analysis Performed By: MARK PEYSAKHOV

GO I Structure Structure Type Length ID of Structure Nor \ EDS (Nonadb No F B C M >=05 (J >=5p Chrys Amphibole Nonasti Ambig/ND No Coord <Sp Elements)

_.-_VL---- ,--------- p

!

Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ale laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B c M >5u '/ = EDS spectrum conforming 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 Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSO = No Structures Detected

CITY_21MC100_003102193

NYC-WTC_000183160