TEM Asbestos air sample results, NYC BOE, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 5820 Filter Type / Filter Area: MCE 385 ram- Lab Sample #: 0 Grid Opening Size: 0.01124 Client Sample #: 5 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

3

Struct = > 0.5)1 >5:1 .Aspect Ratio Grid acceptance:

2= 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 BJC M i >5p v= EDS spectrum conforming to laboratory holes or opaque areas ----- 1------ identification criteria observed Clirysotile i ^ AMPHIBOLES ' Amphibole F = Single Fiber Amosite e = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite j Non-Asbestos Tremolite M = Matnx i Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003106089

NYC-WTC_000185125