TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6080 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/12/01

Analysis Performed By: NLARK PEYSAKHOV

GO. 1 Siructure Structure Type Length ID of Structure N or EDS {Nonadb No F i B C M >=05 p Chrys Amphibole Monasb Ambig/ND No Coord <5p Elements)

I Struct = > 0.5p. >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% i F ' B C M N= EDS spectrum conforming to laboratory holes or opaque areas _________________ I Identification critena observed Chrysotile AMPHIBOLES Amphibole F : Single Fiber Amosite B = Bundle fibers <1 liber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos M = Matrix 1 Tremolite 1 Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003104703

NYC-WTC_000184155