TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE V olume (liters): 1832 Lab Group #: 0008 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: lO AreaEj^amined: 0,04496 mm^

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3 3/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor EDS (Nonadb No "A,. >-5p Chrys No Coord MB C M <5p Amphibole Nonasb Ambig/ND Elements)

1—f 7

1' i—( j—i 4------- 1------- F ]— -1------- f —I----

i--- h

---- h J—1

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: , Positive diffraction pattern properties conforming to ^50% undissolved filter, overlapped or folded Totals i_ <10% particulate coverage >50% coverage ate laboratory identification criteria observed

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

CITY_21MC100_0 03102251

NYC-WTC_000183201