NYC-WTC_000211756

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count S et Client Name: NYC BOE V. lie (liters'): 1814.5 Lab Group #: 8243 Filter Type . iter Area: MCE 385 mm^ Lab Sample #: 13 Grid ‘ !Hiig Size: 0.01124 Client Sample #: 13 Ar.- Examined: 0.04496 mm^

GRID BOX: iiillcation: 20,000 GRID ID: Acceki It Voltage: 100 KeV # Grid Openings: 4 .vsis Date: 6/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID ructure Norv EDS (Nonadb No F B C M >=05 p :>=5p Chrys Amphi: Notiasb Ambig/ND No Coord <5p Elements)

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Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: A- Positive diffraction pattern properties conforming to <50% undissolved lilter, overtappedor 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 smile AMPHIBOLES ■ de F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart .■ llS Crocidolite C = Cluster (>3 Intersections) Anthophyllite N. .. ■-■...IOS Tremolite M = Matrix WT' ;::ied Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO2865158

NYC-WTC_000211756