NYC-WTC_000214553

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7939 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 06 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/2/02

Analysis Performed By: MARK PEYSAKHOV

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

7“^

Struct = > 0.5p ,> 5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties ccnfomiinq to *50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or ovettapped grid squares <5% B C M >5m 'J- EDS spectrum conforming to laboratory holes or opaque areas ______________ F identification critena observed Chrysotile rAMPHIBOLES^' Amphibole F = Single Fiber I------------------------ I i Amosite . B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) i Anthophyllite Non-Asbestos I Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_000463037 NYC-WTC_000214553