NYC-WTC_000189165

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6671 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 07 Area Examined: 0.04496 mm"

GRJD BOX: Magnitication: 20,000 GRU) ID: ■''S' Accelerating Voltaee: 100 KeV # Grid Openings: 4 AnalysisDate; 2/14/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 4 EDS No >=05 p ~>=5p (Nonadb F B C M Chrys Amphibole Nonasb Ambig/ND Elements) No Coord <5m

Struct = > 0.5g .>5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties 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 >5p 7= 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) i Anthophyllite Non-Asbestos ) Tremolite M - Matrix Non-Identified Actinolite NSD = No Structures Detected

CITy_21MC100_003084034

NYC-WTC_000189173