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 #: 7587 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 09 Area Examined: 0.04496 mm* GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/30/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of structure N or V EDS No (Nonadb [ F B C M >=05 p : •=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5P Elements) [

Z i J*

L Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: \= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification enter'= observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% ■

B C M j >5u v= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observec Chrysotile AMPHIBOLES Amphibole I F = Single Fiber Amosite B = Bundle i<3 fibers <1 fiber diameter aoart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix Actinolite i Non-Identified j NSD = No Structures Cetected

CONFIDENTIAL, CITY_21MC100_003471385 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177147