NYC-WTC_000221034

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1814.5 Lab Group #: 7606 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: r~ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/2/02

Analysis Performed By: MARKPEYSAKHOV

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

Jr ---- - —-

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: 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% F B C M >5m ^/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 6 = Bunale (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnz Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002887015

NYC-WTC_000221034