NYC-WTC_000190850

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 7559 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: ‘fr/oE. Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/28/02 Analysis Performed By: "

ROMAN PEYSAKHOV

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

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Struct = > 0.5g .>5:1 Aspect Ratio Grid acceptance: 'I- Positive diffraction pattern properties conforming to *^5®**^ undissolved fitter, overiapped or folded Totals i,hnr,.„R, laboratojy identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification entena observed Chrysotile [amphibqles Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart ; Crocidolite Ambiguous C = Cluster (>3 Intersections) ; Anthophyllite Non-Asbestos I Tremolite M = Matrix Non-Identified ’ Actinolite j NSD = No Structures Detected

CITY_21MC100_003089899

NYC-WTC_000190850