NYC-WTC_000228673

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 7592 Filter Type / Filter Area: MCE 385 mm^ Lab Samole^ 7 Grid Opening Size: 0.01124

Client Sample #: 09 Area Examined: 0.04496

GRID BOX; Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/30/02

Analysis Performed By; MARK PEYSAKHOV

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

Struct = > 0.5pt > 5:1 Aspect Ratio Gridaccaptance: V= Positive diffraction pattern properties conforming to undissolved filter, overtep^ or folded Totals lahoratorv identiflcailon laboratory criteria observed identification criteria observed <^0* !>«««** *50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5ij EOS spectrum conforming to latjoratory holds or opaque areas identfcattor criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle i <3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster ;>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No S tructures Detected

CITY_21MC100_002901296

NYC-WTC_000228673