NYC-WTC_000188493

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYCSCA Volume (liters): 1936 Lab Group #: 5801 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 7 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: # Grid Openings: 4 Accelerating Voltage: 100 KeV

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

7^ 2^ u □rz 74/-------

1-4

Struct = > 0.5)1 > 5:1 Aspect Ratio Grid acceptance: A = Positive diffraction pattern properties conforming to <50% undissoived 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 4= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile : AMPHIBOLES 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 Actinolite NSD = No Structures Detected

CITY_21MC100_003081519

NYC-WTC_000188493