NYC-WTC_000200915

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7739 Filter Type / Filter Area: MCE 385 Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/14/02

Analysis Performed By: MARK PEYSAKIIOV

GO. Structure Structure Type Length ID of Structure NorN EDS (Nonadb No ■ F B C M >=05 (J >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

■ g

^<5

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to "'5®°''° unoissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% paniculate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5p ■' V- EDS spectrum conforming to laborator/ holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle {<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos Tremolite I M = Matrix Actinolite Non-Identified NSD = No Structures Detected '

CITY_21MC100_0112'7 52 54

NYC-WTC_000200925