TEM Asbestos Air Sample Data Sheet, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1928 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 6 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 CRIP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

■GO Structure Structure Type Length ID of Structure N or N EDS No (Nonadb F B C M >-05 u >=5|J Chrys Amphibole Nonasb Ambig/ND <5p Elements)

A

Struct = ■> 0.5p >5:1 Aspect Ratio Grid ac;eptance:

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 overiapped gnd squares <5% >5|J . F B C M EDS spectrum conforming to laboratory holes nr opaque areas identification criteria observed Chrysotile amphiboles" I 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 ■I. . 'NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430251

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175119