NYC-WTC_000214511

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7910 Filter Type / Filter Area; MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/30/02

Analysis Performed By: MARK PEYSAKHOV

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

Z Z-

Struct = >0.5n >5 I Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to tmdissolved 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 >1= 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_000462897 NYC-WTC_000214511