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 #: 6908 FjlteM^ygeV^jlterjVetK, MCE 385 mm-' Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 05 Area Examined: 0.04496 mm-

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

Analysis Performed By: MARK PEYSAKHOV

GO I Structure Structure Type Length ID of Structure Si or v EDS -| (Nonadb No F B C M >=05 pj : =5p Chrys Amphibole Nonast Ambig/ND No Coord <5(j I Elements) ]--------- I I W-f !

------1,-.. ---- i— 1----- (

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

\i = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laooratory identification criteria observed least 20 unfolded or overlapped grid squares <5% [ i F I B I C I M ! >5iJ \(= tDS spec’irum conforming to laboraton/ holes or opaque areas L identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite Non-Identified ! M = Matrix Actinolite NSD = No Structures Detected

CITY_21MC100_003102248

NYC-WTC_000183196