TEM asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

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TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 LabjTroupJr: 7540 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0.04496 mm^ GRID BOX: Magnill cation: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/27/02

.Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb F B C M >=05 u >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

P’ ----- s.? XX ----

1------- r

H Struct = > 0.5p >5:1 A.spect Ratio Grid acceptance:

V= 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 1 M j >5p v= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chiysotile A.MPHIBOLES Amphibole F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos Tremolite M = Malnx i Non-Identified Actinolite NSD = No Structures Detecteo I____ _ _____

CONFIDENTIAL, CITY_21MC1OO_OO34713OO SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177084