TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6852 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: / Grid Opening Size: 0.01124

Client Sample #: 7 Area Examined: 0.04496 mtn-

GRID BOX: - Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2'28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or M EDS No (Nonadb F B ' C M >=05 p >=5iJ Chrys ArTiphibole Nonasfc Amaig/ND No Coord <5p ! Elements)

PZ.

2.// ----

1—r

li

I I

Struct = > 0.ip >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% B C M I >5p '/= EDS spectrum conforming to laboratory identification criteria observed holes or opaque areas Chrysotile i ------ i--- .AMPHIBOLES Amphibole i F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diarreter apart Crocidolite Ambiguous I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I remolite M = Matrix Non-Identified Actinolite NSj = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468203 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181248