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 #: 8759 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 5 Grid Opening Size- 0 01124

Client Sample #: 05 Area Examined: 0 04496

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

Analysis Performed By: ROMAN PEYSAKHOV

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

~~Ti I

Struct = > 0 5p >5 I Aspect Ratio Gnd acceptance <= 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 overiapped gnd squares <5% F B C M >5u V- EDS spectrum conforming to laboratory holes or opaque areas Identification cnteria observed Chrysotile ' AMPHIBOLES J Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix I remolite Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003431223

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175482