NYC-WTC_000228595

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume (liters): 1800 Lab Group #: 7508 Filter Type / Filter Area: MCE 385 mm- Lab Sample #; 5 Grid Opening Size: 0.01124

Client Sample #: 07 Area Examined: 0.04496 rnm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Vo 11age: too KeV # Grid Openings; 4 Analysis Date: 4/23/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS I No >=05 p :>=5p Amphibole Nonasb Ambig/ND (Nonacb F B C M Chrys Elements) No Coord <5p -------------- 1 SSI rf__ pg ±-

1 4

jI

Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance: A- 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 or overlapped grid squares <5% F B C M i >5p EDS specbum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite Crocidolite Ambiguous B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster {>3 Intersections) Anttiophyllite Non-Asbestos Tremolite M = Matnx Actinolite Non-Identified 1---- f NSD = No Structures Detected

CITY_21MC100_002901102

NYC-WTC_000228595