TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: WC BOE Volame (liters): 1936 Lab Group #: 6117 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 min- GRID BOX: 4X2 Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/15/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. j Structure Structure Type Length ID of Structure N or 7 EDS \ No F B C M >=05 p :>=51J Ctirys Amphibole Nonasb Ambig/ND (Nonadb Ng Coord i <5(j Elements)

___ ir 1/

Struct = > 0 5u > 5 1 Aspect Ratio Grid acceptance:

'J = Positive diffraction pattern properties conforming to <50% undissoived 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 >50 ■ 7= EDS spectrum conforming to laboratory holes or opaque areas identification enteria observed Chrysotile ' AMPHIBOLES j Amphibole - -■ S ngle Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matnx Non-Identified Actinolite NSD = No Structures Deiected

CITY_21MC100_003104821

NYC-WTC_000184235