NYC-WTC_000204738

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: >rYC BOE Volume (liters): 1920 » Lab Group #: 7358 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/8/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonado I F B c M >=05 p i '=5p Chrys Amphibole Nonasb AmDig/ND No Coord <5P Elgrrentsj

-3 <3^' Ji

1

Struct = > O.Op >5:1 Aspect Ratio Gnd acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlaoped or folded Totals lacioratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded cr overlapped grid squares <5% f p { B C I M >5c \ = EDS spectrum conforming to laboratory holes or opaque areas icentification criteria observed Chrvsotile i AMPHIBOLES Amphibole F = Single Fiber Amosite B ■■ Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C - Cluster (>3 Intersections) Anthophyllite Non-Asbestos | Tremolite M = Matrix Non-Identified ' Actinolite NSD = No Structures Detected

CITy_21MC100_003061827

NYC-WTC_000204738