TEM asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1832 Lab Group #: 8280 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm"

GEOD BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 6/25/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 9 EDS No >=05 u (Nonacb F B C M >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5m Eiemen's)

Struct = > 0.5|r > 5:1 Aspect P.atio Grid acceptance: ni= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M 'J- EDS spectrum conforming to laboetory holes or opaque areas identification cnteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apar: Crocidolite Ambiguous C = Cluster (>3 intersections; Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite ■ Non-Identified NSD = No Structures Detected

CITY_21MC100_003094669

NYC-WTC_000193436