NYC-WTC_000224959

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Voluniie (liters): 1920 Lab Group #: 7554 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: 4/28/02

Analysis Performed By: l\J _________ ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS No >=05 u :>=5|j Amphibole (Nonadb F B C M Chrys Nonasb Ambig/ND No <Sm Elements)

7/^ T~~ •2L I (f

A 1^2 Q -2^

Struct => 0.5p >5:1 Aspect Ratio Grid acceptance: 9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratofy identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES I Amphibole F = Single Fiber Amosite I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite ' Actinolite Non-Identified NSD = Mo Structures Detected

CITY_21MC1OO_OO2894893

NYC-WTC_000224959