TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7406 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 07 Area Examined: 0.04496 mm- GRID BOX: Ma2nification: 20,000 GRIDID: 7^? Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N w v EDS (Nonadb No F B C j M ZosTi i>=5|J Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5m

I J 4

I _____________ L Struct - > 0.5m. 5:1 Aspect Ratio Grid acceptance: '/= 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% iZ C M 1 >5p V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES ) Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identitied Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471066 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176925