TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE yolumejlitersji 1944 Lab Group #: 6208 Filter Tvpe / Filter Area: MCE .385 mm- j Lab Sample #: 4 Grid Opening Size: 0 01124

Client Sample #: 4 Area Examined: 0,04496 mm*

GRID BOX: /3 Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/27/01

Analysis Performed By: ROMAN PEYSAKHOV

GC. Structure Structure Type Length ID of Structure N or N EDS c (Nonadb No 3 C M >=54 Chrys Amphibole j Nonasb Ambig/ND No Coord <5p Elements)

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Struct = > 0.5p > 5:1 Aspect Ratio ।Gnd acceptance: 1= Positive diffraction pattern properties conforming to .<50% ■' undissolved filter, overlapped or folded Totals laooratory identification criteria observed <10% j particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F M >5p EDS spectrum conforming to laboratory |holes or opaque areas -------- ideniification cntena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite E = Bundle f<3 fibers <’ fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified ; Actinolite NSD = No Structures Detected

CITY_21MC100_003105131

NYC-WTC_000184445