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): 1920 Lab Group #: 8759 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0 01124

Client Sample #: 15 Area Examined: 0 04496 mm’

Crip box: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Periormed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure Nor y EDS No (Nonadb F B C M >=05 u Chrys | Amphibole Nonasb Ambig/ND 1 xs No Coord <5p Elements)

/SI i

I “

Stiuct = > 0 5p >51 Aspect Ratio Grid acceptance 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 gnd squares <5% F B C M >5|j ■<1- EDS spectrum conforming to laboratory 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) Anthophyllite Non-Asbestos M - Matnx Tremolite Actinolite Non-Idcntified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3431233

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175491