NYC-WTC_000214535

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7928 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/1/02 Analysis Performed By: ^7/

ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nory EDS No (Nonadb F B C M >=05 M >=5|J Chrys Amphibole Nonasb Ambig/ND

SA No Coord

vf <5p Elements)

tf 7

i----- I-------- 1

Struct = > 0.5^ _> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to ‘=5’’% undissohzed 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 ! >/= 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) I Anthophyllite Non-Asbestos Tremolite i M = Matrix Actinolite Non-Identified NSD = No Structures Detected I

CITY_21MC100_000463014 NYC-WTC_000214535