TEM Asbestos air sample results, WC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1944 Lab Group #: 6080 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 13 Grid Opening Size: 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/12/01

Analysis Performed By: MARKPEYSAKHOV

GC. Structure Structure Type Length ID of Structure Nott EDS (Nonadb No F B C M >=05 u >=5p Chrys Amphibole Nonasb Amoig/ND No Coord Elements) <5u

Struct = > 0.3p > 5:! Aspect Ratio Grid acceptance:

■V- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification crltena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F I B C M >5m EDS spectrum conforming to laboratory holes or opacue areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous’ C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSC = No Structures Detected

CITY_21MC100_003104705

NYC-WTC_000184157