TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: OTC BOE Volume (liters): 1944 Lah Group #: 6179 Filter Type / Filter Area: MCE 385 Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/22/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type | Length ID of Structure N or N EDS No (Nonadb F B C >=05 P >=5)j Chrys Amphibole Nonasb Ambig/ND Me Coord I <5p Elements)

y v ((

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5p identification cnteria observed Chrysotile AMPHIBOLES Ajnphibole F = Single Fiber Amosite B = Bundle (<3 fibers <" fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSC = Ng Structures Detected

CITY_21MC100_003105015

NYC-WTC_000184366