NYC-WTC_000188907

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volnme iliters): 1928 Lab Group #: 5886 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID IP: c Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/13/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M >=05 p : •=5p Chrys Amphibole Nanasb Ambig/ND No Coord <5u Elements) i -------------1 i

Struct = > 0.5u _> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properaes confomting to ^^0% undissolved filter, overiapped or folded Totals laboratory Identification critena observed 10% particulate coverage >50% coverage ate least 20 untoldeo or overlapped gric squares <5% F B C M >5u y= EDS spectrum coniorming to laboratory holes or opaque areas identification criteria observed Chiysotile AMPHIBOLES j 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 j Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003083149

NYC-WTC_000188907