NYC-WTC_000227271

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7047 Filter Type / Filter Area: MCE 385 mm" Lab Sample#: 8 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/12/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length IO of Structure N or V EDS No (Nonadb F B C M >05 p :>=5pi Chrys Amphibole Nonasb Ambig/ND ' No Coord <5iJ Elements)

I I

Struct = > 0.5|i > 5:1 Aspect Ratio Grid acceptance: <= Positive diffracfen pattern properties conforming to "50% undissolved filler, overlapped or folded Tot^ laboratory identificalion criteria observed Pk/M 1*^Vi <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >51J 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) I Anthophyllite Non-Asbestos Tremolite I M = Matn'x Actinolite i Non-Identified NSD = No Structures Detected

CITY_21MC100_002898567

NYC-WTC_000227271