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TEM asbestos air sample data sheet, Sample 11

Machine-extracted title · confidence 90%

Microscopic analysis data sheet for the eleventh air sample collected on August 23, 2002, documenting fiber counts and grid box details.

NYC-WTC_000175437
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Scanned page image, NYC-WTC_000175437
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name NYC BOE VolumeJIitersi. 1928 Lab Group # 8739 Filter Type / Filter Area MCE j8pmm Lab Sample # 11 Grid Opening Size 0 01124 Client Sample # 11 ___ Area Examined 0 04496 mm GRID BOX Magnification 20 000 GRID IP Accelerating Voltage 100 KeV # Grid Openings 4 Analysis Date 8/23/02

Analysis Performed By ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure NorN EDS (Nonadb No Coord No F B C W i>-5p Chrys Amph bole Nonasb Ambig/ND Elements) 5p

u -JU—

■

Struct = > 0 5u >5 1 Aspect Ratio Gnd acceptance V Positive diffraction pattern properties conforming to 50/ undissolved filler overiapped or folded Totals laboratory dentificalion critena observed 10/ particulate coverage 50/ coverage ate least 20 unfolded or overlapped grid squares 5 / F B C M 5U 'I EDS spectrum conforming to laboratory holes or opaque areas identification cnteria observed Chrysotile AMPHIBOLES Amphibole F Single F ber Amosite B Bundle ( 3 fibers 1 fiber dameter apart Crocidolite Ambiguous C Cluster ( 3 Intersections) Anthophyllite Non Asbestos Tremolite M Matnx Actinolite Non Identified NSD No Structures Detected

CONFIDENTIAL, CITY_21MC100_003431034 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175437

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NYC-WTC_000175437Source: NYC Law Department, mirrored locally

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