TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab_Gl«!*E-^ 6887 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 GritLOpeniimSi^ 0.01 124

Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/1/02

Analysis Performed By: ---- MARK PEYSAKHOV

GO Structure Structure Type Length ID of structure \ or v EDS I No jNonadb F B C M >=05 p n ^=5p Chrys ! Amphibole Nonast: i Ambig/ND No Coord ! <5p Elements) J------------------ i---------------- i !

-I----- 1 -0 i I —r —

J----- r

J----- i-

r"

.I------

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

v'= Positive diffraction pattern properties conforming to <50% undisscived filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed

y'= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B c M >5u holes or opaque areas identification criteria observed Chrysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter aparf Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos Tremolite M = Matrix ! Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102196

NYC-WTC_000183163