TEM asbestos air sample data, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume /liters): 1928 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Dye: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDE (Nonadb No F B C M >=05 p >=5|j Chrys Amphibole Nonasb Ambig/ND N6 Coord Elements) <5p

Tv L

3/^

Struct = >O.5p >5:l Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded ar overlapped grid squares <5% F B C M >5u 4= E'DS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile amphiboles"; Amphibole F'= Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ■C -Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Actinolite Nou-Identified _NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430452 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175170