Asbestos air sample TEM analysis report for 99 Church Street,

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 1300 Lab Group #: 6804 Filter Type / Filter Area: MCE 385 mm' Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 3 Area Examined: 0.06744 mm= GRID BOX: ,Q S~ Magnification: 20,000 GRID ID: 3f L ' '('' Accelerating Voltage: 100 KeV # Grid Openings: 6 Analysis Date: 2/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. 1 Structure Structure Type Length ID of Structure N or EDS No F B M >05 N Amphibole Nonasb AmbigMD (Nonadb j C >=5p ChryS No Coord <5P Elements) 3IU f )a 1~)IIii 1 __ __ __ __ __ __ ___

Qa '

f/ ___ ___ ___ ___ ___ ___ ____

Struct => 0.5µ > 5:1 Aspect Ratio Grid acceptance: d= 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 M >5i v= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremoiite Actinolite Non-Identified NSD = No Structures Detected

NYC-WTC 000124330