NYC-WTC_000212571

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1912 Lab Group #: ■•’781 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 5 Grid Opening Size: 0.01124 Glient Sample #: 05 Area Examined: 0.04496 mm*

(;R1D BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/18/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or EDS No >=05 M (Nonadb F B C M Chrys Amphibole Nooasb Ambig/NO No Coord <5m Elements)

J < ^<2.

Struct •= :■ 0.5p >5:1 Aspect Ratio Grid acceptance: v = Positive diffraction pattern pro(ierties conforming to <50% undissolved 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 ’Su v = EDS spectrum conforming ’o laboratory holes or opaque areas idenlification criteria observed Chrysotile AMPHIBOLES Amphibole F : Single Fiber Amosite B : Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthoptiyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Delected

CITY_21MC100_002867208

NYC-WTC_000212571