TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8759 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 12 Grid Opening Size: 0 01124 Client Sample #: 12 Area Examined: 0 04496 mm^ Magnification: GRID BOX: ■1X32 20,000 GRID ID: Accelerating Voltage: 100 KeV ' # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Perlormed By: —4 ROMAN PEYSAKHOV

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

sPS sz i

ZW4

Sti Lict = > 0 5p >5 I Aspect Ratio Grid acceptance 7 = Positive diffraction pattern properties conforming to *5®'**’ andissolved filter, overlapped or folded Totals laboratory loentification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5rj EDS spectrum conforming to laboratory holes or opaque areas Identification cnteria 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 Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected __________________ I

CONFIDENTIAL, CITY_21MC100_003431230

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175489