TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

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TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group 7353 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: too KeV # Grid Openings: 4 Analysis Date: 4/7/02

Analysis Performed By: MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonabb No F B C M >=^05 pi '>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) |

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Struct = > 0.5g >5:1 Aspect Ratio Grid acceptance:

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

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <6% holes or opaque areas I F ! B I c ] \rp5U identification criteria observed Chrysotile ■AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle ,<3 fibers <1 fiber diameter apart Crocidolite .-Xmbiguou?^ C = Cluster (>3 Intersections) Anthophyllite Non-.Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470890 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176804