TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name NYC BOE Volume (liters) 1928 Lab Group # 8739 Filter Type / Filter Area MCE 385 mm Lab Sample # 2 Grid Opening Size 0 01124 Client Sample # 2 Area Examined 0 04496 mm GRID BOX Magnification 20 000 GRID ID Accelerating Voltage too KeV

zz^z # Grid Openings 4 Analysis Date 8/23/02

Analysis Performed By ROMAN PEYSAKHOV

GO Structure Structure Type Length IO of Structure N or v EDS No “05m :>-5p (Nonadb F B C Chrys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

±2 n —

Struct - > 0 5p >5 I Aspect Ratio Gnd acceptance J-Positive diffraction pattern properties conforming to 50 / undissolved filter overlapped or folded Totals laboratory identification critena observed 10 / particulate coverage 50 / coverage ate least 20 unfolded or overlapped gnd squares 5 / F B C M 5p V EDS spectrum conforming to laboralory holes or opaque areas Identification cntena observed Chrysotile AMPHIBOLES Amphibole F Single Fiber Amosite B Bundle ( 3 fibers <1 fiber diameter apart Crocidolite Ambiguous C Cluster (>3 Intersections) I Anthophyllite Non Asbestos Tremolite M Matrix Non Identified Actinolite NSD No Structures Detected

CONFIDENTIAL, CITY_21MC100_003431139 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175458