TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NX’C BOE Volume (liters ): 1936 Lab Group #: 6126 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm^

GEUD BOX: Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/18/01

Analysis Performed By: MARK PEYSAKHOV

GO Structure ] Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M TTosp r~ '=5p Chrys Amphibole NonasP AmOig/ND No Coord <5|j Elements)

StrLCt = >0.5u > 5:1 Aspect Ratio Grid acceptance: V= 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% ! F B C i M >5u \'= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile : AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart CrociOolite Ambiguous i C = Cluster (>3 Intersections’ i Anttiophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003104877

NYC-WTC_000184268