NYC-WTC_000219483

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 6880 Filter Type / Filter Area: ■MCE 385 mm- Lab Sample #: 1 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.1)4496 mm-

GRID BOX: Magnification: 20,000 GRIB ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3 1 02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure T/pe Length ID of Structure N or N EDS No >=05 p Amphibole NonasD “Ambig/ND -(Nonadb F B C M Chrys Elements) No Coord <5p

A xO !------- ! T I + I1

Struct = > 0.5 p > 5:1 Aspect Ratio Grid acceptance: y = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% 1 F I B i C i M >5p '/= EDS spectrum conforming to laboratory holes or opaque areas )-------- P identification criteria observed Clirysotile i AMPHIBOLES Amphibole i F = Single Fiber Amosite 9 = 9undle (<3 fibers <1 fiber diameter aoart Crocidolite .Ambiguous ■ C = Cluster i>3 Intersections! Anthophyllite Non-.\sbestos Tremolite y = Matrix Actinolite Non Ideniified NSC = No Structures Detected

CITY_21MC1OO_OO2881169

NYC-WTC_000219483