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TEM analysis data sheet for air sample 7100-3, Mar 2002

Machine-extracted title · confidence 90%

Technical data sheet recording microscopic analysis parameters and results for an air sample collected at a NYC Board of Education facility.

NYC-WTC_000178856
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 7100 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: £4^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/16/02

Analysis Performed By: ROMAN PEYSAKHOV

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

7 ---------------

Struct = > 0.5|j >5:1 Aspect Ratio Grid acceptance: 7 = Positive diffraction pattern properties confomiing to <50% undissolved filter, overlapped or folded Totals laboratory identificalion criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >6p 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile I amphiboles Amphibole F = Single Fiber I Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart ' Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSO = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03391092 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178856

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NYC-WTC_000178856Source: NYC Law Department, mirrored locally

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