NYC-WTC_000188406

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1824 Lab Group #: 7716 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/11/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure N or V EDS No (Nonadb F B C M >=05 M >=5|j Chrys Amphibole Nonasb AmbigIND Elements)

4

70

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: >/= Posrbve diffraction pattern properties conforming to <50% undisaoived filter, overtapped or folded Totals laboratory Kientrfication criteria observed <10% particulatB coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5m •/= EOS spectrum conforming to laboratoiy holes or opaque areas identifleation 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 Actinolite Non-ldentificd NSD = No Structures Detected

CITY_21MC100_003080212

NYC-WTC_OO0188411