NYC-WTC_000193818

NYC 9/11 Public Portal Document

TKMAsbeslos(air)jCoujit She Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 7421 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/15/02

Analysis Performed By; ROMAN PEYSAKHOV \ GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M >=05 p >=5m Chrys Amphitiole Nonasb Ambig/ND No Coord <5p Elements)

94 4- it-

Struct = > 0.5n > 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 oroverlapped grid squares <5% F B C M >5m EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile j 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 = Matnx Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_0 03095471

NYC-WTC_000193818