NYC-WTC_000225450

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6064 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0.01124

Client Sample #: 16 Area Examined: 0.04496 mm'

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/8/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type . Length ID of Structure N or v EDS No >=05 u (Nonadb F B C M >=5p Chrys Amphiboie Nonasb Ambig/ND No Coord <5p Elements) /

f.

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

CITY_21MC100_000622490 NYC-WTC_000225450