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TEM Asbestos Air Sample Data Sheet, Aug 2002
Machine-extracted title · confidence 90%Technical data sheet recording transmission electron microscopy analysis parameters and results for air sample number 11 collected August 25, 2002.
NYC-WTC_000175124Page image
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NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 mm-’ Lab Sample #: 11 Grid Opening Size: 0.01124 Ghent Sample #: 11 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 , GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 8/25/02
Analysis Performed By: ROMAN PEYSAKHOV
' -GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb fTb c M >=05 p Ctirys Amphibole Nonasb Ambig/ND Elements) //I <5p
Struct = > 0.5,11 >5:1 Aspect Ratio Grid acceptance:
Positive diffraclion 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 >5p 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 Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC1OO_O03430256
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175124
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NYC-WTC_000175124Source: NYC Law Department, mirrored locally
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