NYC-WTC_000221906

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1805 Lab Group #: 7534 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 AreaExamined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRIPID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/25/02

Analysis Performed By: MARKPEYSAKHOV

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

I 1

t

Struct = > O.5(x > 5:1 Aspect Ratio Grid acceptance: 8 = Posilive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u N= EDS spectrum conforming to laooratory holes or opaque areas identification criteria observed Chrvsotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbcslos Tremolite M = Matrix Non-Identified Actinolite NSO = No Structures Detected

CITY_2IMCl0 0_0 00489508 NYC-WTC_000221906