NYC-WTC_000204251

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client iName: NYC BOE Volume (liters): 1856 Lab Group #: 7345 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nord EDS No (Nonadb F B C M >=05 p >^5-1 Chrys Amphibole Nonasfc Ambig/ND No Coord <5u Elements)

Struct > 0.5p > 5:1 Aspect Ratio Grid acceptance:

4= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed

v'= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5p

identification c'lteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections; Anthophyllite Non-Asbeslos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003060024

NYC-WTC_000204251