TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1832 Lab Group #: 8294 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 6/26/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C M >=05 M >=5)j Ctirys Amphibole Nonasb Ambig/ND A No Coord <5p Elements)

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Struct = > 0.5n >5:1 Aspect Ratio Grid acceptance: t/- Positive diffraction pattern properties conforming to ;50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed *:1O% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5u >/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile pAMPHIBOLES 1 Amphibole F = Single Fiber Amosite i B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Actinolite ! Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3461837 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179941