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TEM asbestos air sample data sheet, Sample 4

Machine-extracted title · confidence 90%

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

NYC-WTC_000175430
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Scanned page image, NYC-WTC_000175430
OCR text

OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ClientName NYC BOE Volume (liters) 1928 Lab Group # 8739 Filter Type / Filter Area MCE 385 mm^ Lab Sample # 4 Grid Opening Size 0 01124 Client Sample # 4 Area Examined 0 04496 mm^

GRID BOX Magnification 20 000 GRID ID Accelerating Voltage too KeV # Grid Openings 4 Analysis Date 8/23/02

Analysis Performed By ROMAN Pi^SAKHOV

GO Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M 05 M >=5p Chrys Amphibole Nonasb Ambg/ND No Coord <5m Elements)

2

' it

Struct = > 0 5p >0 1 Aspect Ratio Gntf acceptance t Positive diffraction pattern properties conforming to 50 / undissolved filter overlapped or folded Totals taboratory identification critena observed 10 / particulate coverage 50 / coverage ate least 20 unfolded or overlapped gnd squares 5 / F B C M 5m 'J EDS spectrum conforming to laboratory holes or opaque areas identification catena observed Chrysotile AMPHIBOLES Amphibole F Single Fiber Amosite B Bundle! 3 fibers 1 fiber diameter apart Crocidolite Ambiguous C Cluster! 3Intersections) Anthophyllite Non Asbestos Tremolite M Matnx Actinolite Non Identified N8O No Structures Detected

CONFIDENTIAL, CITY_21MC100_003431027 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175430

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NYC-WTC_000175430Source: NYC Law Department, mirrored locally

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