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): 1800 Lab Group 7291 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: 7^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure T/pe Length ID of Structure N or N EDS I No (Nonadb i F B C M >=05 M >=5p Chrys Amphibole Nonasb Ambig/ND n No Coord .. <5p Elements)

/is IL a V -----

l

1 r 1—1

Struct = > 0.5u > 5.1 Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% paniculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5°'o • B ! C I M i >5m = EDS spectrum conforming to laboratory holes or opaque areas 1r I Identification criteria observed Chrysotile i ■A.MPHIBOLES : Amphibole ' F = Single Fiber Amosite B = Suncle (<3 fibers <1 fiber diameter apan Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matnx I Non-Identified i Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC10 0_0 03 47 0'7 66 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176725