NYC-WTC_000202890

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 3600 9035 Filter Type / Filter Area: MCE 385 mm^ w Lab Sample #: 28 Grid Opening Size: 0.01124

Client Sample #: 28 Area Examined: 0.24728

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 22 Analysis Date: 10/29/02

Analysis Performed By: ROMAN PEYSAKHOV

I GO. structure Structure Type Length ID of Structure N or 7 EDS ! I (Nonadb No F B C M >=05 M ; '=5(J Chrys Amphibole Nonasb Ambig/ND ‘ No I Coord <5(1 Elements)

/(/ xC

73

fy

■ Photo No, (from ' in 5 asoestos containing samples) Grid acceptance: Struct = > 0.5p A 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% Tf B I C I M i >5i7 holes or opaque areas Chrysotile j EDS spectrum conforming to laboratory identification criteria observed AMPHIBOLES Amphibole I F = Single Fiber Amosite 3 = 3undle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos [ M = Matrix Tremolite Actinolite Non-Identified j NSD = No Structures Detected

CITY_21MC100_003069461

NYC-WTC_000202917