TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7123 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 17 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20 000 GRID ID: J Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/18/02

Analysis Performed By: ROMAN PEYSAKHOV

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

2:2. ^72-

Struct = > 0.5)1 > 5:1 Aspect Ratio Grid acceptance; 7= Positive 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 >5m V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile I AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified NSD = No Structures Detected Actinolite .J

CITY_21MC100_003102637

NYC-WTC_000183450