TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7334 Filter TypeVFilter Area: MCE 385 mm’ Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/5/02

__ Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Norv EDS ! No (Nonadb F B C M >=05 p >=51J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) }

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.7

Struct = > 0,5p > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laborator/ identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiappec grid squares <5% F B C M >6(J V- EDS spectrum conforming to laboratory holes or opaque areas identification criteria 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 Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470847 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176775