NYC-WTC_000219192

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client .Name: N'YC BOE Volume (liters): 1800 Lab Group #: 7460 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/18/02

.Analysis Performed By: MARK PEYSAKHOV

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

Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to ‘50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed t«« t* A •• < :□M •: A am <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p v'= EDS spectrum conforming to laboratory holes or opaque areas Identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = IMO Structures Detected

CITY_21MC100_002879463

NYC-WTC_000219192