TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: mT BOE Volume (liters): 1920 Lab Group #: 7483 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/20/02 Analysis Performed By: /^^

ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure NorV EOS No (Nonadb F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5|j Elements) I

1/ ■

IL

i i Struct = > 0.5(1 >5:1 Aspect Ratio Grid acceptance:

y= 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 oveitapped grid squares <5% f F B C ! M i >5u v= EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber ciameter apart Crocidolite Ambiguous ! C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite i M = Matrix NSD = No Structures Detected Actinolite Non-Identified i

CONFIDENTIAL, CITY_21MC100_003471191 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177009