TEM Asbestos air sample results, NYC BOE, Apr 25 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE i 'le (liters): 1816 Lab Group #: 7539 Filtei Type I- iiter Area: MCE 385 mm^ Lab Sample #: 12 Grid f ; iiiiig Size: 0.01124

Client Sample #: 15 .All Examined: 0.04496 mm’ GRID BOX: iilication: 20,000 GRID ID: Aceeler;’! ’ i Vokagt^ too KeV # Grid Openings: 4 A v;4s I)ate2 4/25/02

Analysis Performed By: MARK PEYaAKHOV

GO Structure Struc'ure Type Length S:■ uI,Tre N or V EDS No (Nonadb F i E C M >=05 p Chrys Ampl’.:;. lionasb j Ambig/ND No Coord <5m Elements)

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. ________ Struct = >0.5(1 >5:1 Aspvcl Ratu Grid acceptance: 9= Positive diffraction pattern properties cc.ifc ning to <50% undissolved filter, out sapped or folded Totals <10% particulate coveraqo :0% coverage ate laboratory identification criteria observed least 20 unfolded or ovenap: «d grid squares <5% c M >5m EDS spectrum conforming to laborator . holes or opaque areas — T-IC identification criteria observed iie i AMPHIBOLES lie F = Single Fiber Amosite 11 A AIS . B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) Anthophyllite Tremolite M = Matrix Actinolite NSD = No Structures Delected

CITY_21MC100_003102070

NYC-WTC_000183075