NYC-WTC_000212521

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7579 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 I (iSnUD; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/29/02

Analysis Performed By: /yz ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS No (Nonadb F B C M >=05 p ■>=51J Chrys Amphibole Nonasb Ambig/NO <5p Elements)

* 42 4

Struct - > 0 5p > 5:1 Aspect Ratio Grid acceptance, N- Positive diffraction pattern p-operties conforming to <50% undissolved filter, overlapped or folded Totals Icboratoiy 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 aboratory holes or opaque areas icentification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 0 = Bundle (<3 fibers <1 fiber d ameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite y = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC1OO_OO2866856

NYC-WTC_000212521