TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 6822 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: /J2T Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/24/02

Analysis Performed By: MARKPEYSAKHOV

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

S jp-:? n 3.

a

Struct = > 0.5g >5:1 Aspect Ratio Grid acceptance: Positive dfffractlon pattern properties conforming to <50% undissolved fflter, overlapped prfolded Totals Iaborato7 identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B G M >5m '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole , F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite i Non-Asbestos Tremolite M=.Matrix Actinolite ; Non-Identified NSD = No Structures Detected

CITY_21MC100_003108277

NYC-WTC_000185665