TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client NYC BOE Voiuniejliter^ 1920 Lab Group #: 7494 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm* GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/21/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure SiructureType Length ID of Structure N or 7 EDS I No (Nonadb F B C M >=05 M :>=5|j Chrys Amphibole Nonasb Arabig/ND No Coord i <5p Elements) /■

-I

I 7

Struct > (15u >5:1 Aspect Ratio Grid acceptance: ';= Fcsitive ciftracaon 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 ovehapped grid scuares <5% / \ = EDS spectrum conforming to laboratory holes or ooaque areas (. _____ P B i C i M I >5p identificatiop criteria obsenrec Chrysotile AMPHIBOLES Amphibole n = Single Fiber Amosite B = BLtiaie I<3 libers <1 fiber ciameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections: Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified i Actinolite NSD = ho Structures Detected

CONFIDENTIAL, CITY_21MC100_003471184 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177008