NYC-WTC_000199289

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8809 Filter Type / Filter Area: MCE 385 inm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 - GRID ID: Accelerating Voltage: 100 KeV Grid Openings: 4 Analv^s Date: 9/5/02

Analysis Performed By; MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 9 EDS (NonadP No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

__ C.

Arcs I

Struct = > 0,5p >5:1 Aspect Ratio Grid acceptance;

\'= Positive diffraction pattern properties conforming to <50% uncissolved filter, overlapped or folded lOlals <10% particulate coverage >50% coverage ale laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5m 9= EDS 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) I Anthophyllite Non-Asbestos 1 Tremolite M = Matrix I Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003048967

NYC-WTC_000199289