TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 5999 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 1 Grid Opening Si2e: 0.01124 Client Sample #: 1 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/30/01

Analysis Performed By: -------- NLARK PEYSAKHOV

GO. Structure Structure :ype Length ID of structure Nor 2 EDS No F B C M >=05 u i>=5(j Chrys Amphibole Nonasb Ambig/ND ) No Coord <5tJ Elements)

a 1

-L

Struct = > 0.5n ->5:1 Aspect Ratio Grid acceptance: 2= 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% F B C M >5p 2= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOL^ Amphibole F = Single Fiber .Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos M = Matrix T remolite Actinolite Non-Identified NSD = No Siruclures Detected

CONFIDENTIAL, CITY_21MC100_003458527 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179245