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): 1936 Lab Group #: 8229 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm^ GRID BOX: Magnification; 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 6/23/02 Analysis Performed By: '

ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure NorN EDS No Amphibole (Nonadb F 6 C M >=05 M • >=5|J ■ ■ Chrys Nonasb AmbigZND No Coord <5u'- . Elements)

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Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: >1-. Positive diffraction pattern properfies conforming to <5°% und^soNed filter, overlapped or folded Totals laboratory identification criteria observed *:10% 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 AMPHfBQLES ' Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD - No Structures Detected

CONFIDENTIAL, CITY_21MC100_003461748 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179880