TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7095 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 17 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/16/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS >=cTT ;>=5p (Nonadb No F B C M Chrys Amphibole Nonasb Ambig/ND No I Coord <5m Elements)

sr

r----- -- I' Struct = > 0.5n _> 5:1 Aspect Ratio Grid acceptance: = 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 gnd squares <5% F B C M >51J EDS spectrum conforming to laboratory holes or opaque areas identification cnteria obsen/ed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO2571898

NYC-WTC_000183392