NYC-WTC_000207405

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1928 Lab Group #: 8036 . Filter Type / Filter Area: MCE 385'mm^ Lab Sample #: ; 5 Grid Opening Size: 0.01124 Client Sample #: 5 z , ' Area Examined: 0.04496 rhm- '

GRID BOX: ZZZ Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV . # Grid Openings: 4 . Analysis Date: 6/10/02 -

Analysis Performed By:.' ROMAN PEYSAKHOV

GO. Structure Structure Type Length ' ID of Structure NorN^ EDS■ No (Nonadb ■F„ B C M >=05 p Chrys Amphibole Nonasb , Ambig/ND ' 11 No INO !I Coord uouru . ■ <5p Elements)

z 4

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: ^/= Positive diffraction pattern properties conforming to <50% undissoked filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

'/= EDS spectrum conforming to laboratory • least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M ■>5m ,

idenSfication criteria observed Chrysotile I- 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_21MC100_003015145

NYC-WTC_000207405