NYC-WTC_000212950

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume flitcrs): 1936 Lab Group #: 8225 Filter Type / Filter Ai ea; MCE 385 mm* Lab Sample #: 7 Grid Opening Size; 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm^ GRID BOX: 1^0 Magiiillcntion: 20 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 6/23/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or EDS (Nonadb No F 6 C M >=05 p >=5tJ Chrys Amphibole NOIKlSb Ambig/NO No Coord Elements) <5p

I

Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance; 'J= Posibve diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals labotalory identification criteria observed <10% particulats coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5p EDS spectrum conforming to labcratoiy holes or opaque areas identification criteria observed Chrysotilt; AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Croddolite Ambiguous C = Cluster (>3 IntersecSons) Anthophyllite Non-Asbestos Tremolite M = Malrw Non-Identifiecl Actinolite NSD = No Structures Delected

CITY_21MC100_002867699

NYC-WTC_000212950