NYC-WTC_000212222

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7470 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 09 Area Examined: 0.04496 mm"

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

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 'Z EDS No (Nonadb F B C M >=0571 :>=5(J Chrys Amphibole Nonasb Ambig/ND No Coord <5|J Elements)

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: Posibve 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% F B C M >5p '/= EOS spectnjm conforming to laboratory holes or opaque areas identification criteria observed Chrysotile rAMPHIBOLES I 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 I Actinolite NSD = No Structures Detected

CITY_21MC100_002866224

NYC-WTC_000212222