TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ClitnitNann^ NYC BOE Volume (liters): 1805 Lab Group #: 7503 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/22/02

Analysis Performed By: ROMAN PEYSAKHOV

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

if' Cf'~

I___ I

Struct = >0.5u >5:1 .Aspect Ratio R Grid acceptance:

\= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory der.ri'ication criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% I F i B i C , M \= EDS spectrum conforming to laborator'y hoies or opaque areas loentification criteria observed Chrysotile ,AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber cfometer apart Crocidolite Ambiguous I C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos ; Tremolite M = Matrix j Non-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3471228 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177036