TEM air sample results, 125 Liberty St, Oct 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters: 3600 Lab Group #: 9041 Filter Type / Filter Area: MCE 385 mm2 Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.24728 mm2 GRID BOX: _j Magnification: 20,000 GRID ID: '-J ({.') Accelerating Voltage: 100 KeV # Grid Openings: 22 Analysis Date: 10/30/02

Analysis Performed By: 1P ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS {Nonadb No F B C M >05i. >=5p Chrys Amphibole Nonasb AmbiglND No Coord <5µ Elements)

4 //f

-6

V2-- Ii • tZ 17_z1 t3 ~2 -z ✓

1Ste: j / _ J 2.. 33-3( r Z- z 35 ii f1 36 tj +✓ 37- 3 V. z.Z 3 L10 -tom

Z Sr A 0 o. m in asbestos containma samo Vi W QWOJLQ11U6. Struct = > 0.5.i > 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals i= Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5l1 holes or opaque areas 1= EDS spectrum conforming to laboratory Chrysotile identification criteria observed AMPHIBOLES Amphibole F = Single Fiber Amosite Ambiguous B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix NSD = No Structures Detected Actinolite Non-ldentified Ti

NYC-WTC 000131503