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): 1840 Lab Group #: 7444 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/17/02 Analysis Performed By: "

ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of structure N or v EDS ; (Nonadb i No F B C M >=05 u : -5|j Chrys Amphibole Norasb Ambig/ND No jL^oord <5p Elements) I 7”

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Struct > 0.5|j > 5:1 .Aspect Ratio Gnd acceptance:

v = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals taboratoiy identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C 1 M ! >ou V= EDS spectrum conforming to laborator/ holes or opaque areas loeniiiication criteria observea Chrysotile j AMPHIBOLES Amphibole I F = Sipgie Fiber Amosite 3 = Fun,de f <3 fibers <1 fiber diameter apart Crocidolite Ambiguous ' C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos ; Tremolite M = Matrix Actinolite \ Non-Identified j I_____ ____I NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471109 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176950