NYC-WTC_000204318

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1832 Lab Group #: 7374 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/10/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS (Nonadb No F B C M 3705u i ■=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

X ■2-

.23 ''XX

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: V Positive diffraction pattern properties conforming to ^^0% undissolved filter, overiapped or folded Totals 10% particulate coverage >50% coverage ate laboratory identification criteria observed ^1= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B c M >5p boles or opaque areas identification criteria observed Chrysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003060119

NYC-WTC_000204318