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 #: 7521 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 IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/24/02

Analysis Performed Bv: /N.-/— ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of structure N or N EDS (Nonadb No F B C M >=05 p ■=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) '

MS "___ ^1

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T

! I

Struct - > O-Op > 5: i -Aspect Ratio Grid acceptance:

\ = 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 overlapped grid squares <5% F 1 B j C I M >5p v= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observer: Chrysotile “1 -AMPHIBOLES Amphibole ! F = Single Fiber Amosite B = Bundle । <3 fibers <1 liber diameter apan Crocidolite Ambiguous j C = Cluster|>3 intersections- Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite i Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471264 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177063