TEM Asbestos Air Sample Data Sheet, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm- GRID BOX: Magnificat ion: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By; ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Nory EDS No (Nonadb F B C >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord Au Elements)

£ J £

■ Struct = >0.5p > 5'. 1 Aspect Ratio Grid acceptance: •J- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% paniculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u \l- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed 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 Delected

CONFIDENTIAL, CITY_21MC1OO_OO343O252 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175120