TEM asbestos air sample results, NYC BOL, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOL yolume£llti^rs)i: 1824 Lab Group #: 6897 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01 124

Client Sample #: 13 Area Examined: 0.04496 mm-

GRID BOX: GRID ID: w 26^ Magnification: Accelerating Voltage: 20,000 100 KeV # Grid Openings: 4 AnalysisDatc: 3/2/02

Analysis Performed By: // ROMAN PEYSAKHOV

GO, structure Structure Type Length ID of Structure N or \ EDS (Nonadb No F B C >=05 u >=5p Chrys I Amphibole Nonasb I Ambig/ND Elements) No

LEZ Coord <5p --------------------- I —i----

5 -t— u

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

y = 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 >5u \i= 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 aparf Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_0 03102222

NYC-WTC_000183179