TEM Asbestos air sample results, ATC, Sept 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: ATC Volume (liters): 1944 Lab Group #: 8837 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 10 Grid Opening Size: 001124 Client Sample #: Area Examined: 0 04496 mm"

. GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV #GridOpenings: 4 Analysis Date: 9/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure 1 Structure Type Length ErofStructure N or x/ EDS I {Nonadb No F 8 C M >=05 p ; =51J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

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Stiuct = > 0 op >5 1 Aspect Ratio Grid acceptance

v= Positive diffraction pattern properties conforming to <50% undissGlved tiller overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F ] B I C 1 VI , X. ■J = EDS spectrum conforming to laboratory noIes or opaque areas loeniiiication criteria ooseriied Chiysotile , AMPHIBOLES Amphibole ! F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter aoart Crocidolite Ambiguous I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC1OO_OO343139O SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175527