TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Voluinejliters): 1944 Lab Group #: 5921 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm-

GRID BOX: i Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/19/01

Analysis Performed By; ROMAN PEYSAKHOV

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

Struct = > 0.5jj. _> 5;1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obsenred <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped odd squares <5% F B C Y >5p ’/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBQLES~1 Amphibole F = Single Fiber j Amosite B = Bundle (<3 fibers <1 fiber diameter apart I Crocidolite [ Ambiguous C = Cluster (>3 Intersections) ' Anthophyllite [ Non-Asbestos Tremolite Ivl = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003106567

NYC-WTC_000185443