NYC-WTC_000190295

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1805 Lab Group #: 6779 Filter Type / Filter Area: MCE 385 mi— Lab Sample #: 41 Grid Opening Size: 0 01124

Client Sample #: F-41 Area Examined: 0 04490 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2 22/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure Noi v EDS No (Nonadb F B C M >=0517 i>=5)j Chrys Amphibole Nonasb Ambig/ND No Cooid <5p Elements) ----------- i .VO/' (/ (/

V'f/------

1 I 1 1

Struct = > 0 5p >5 I Aspect Ratio Gnd acceptance ■s/= 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 or overlapped gnd squares <5% F B C M >5p ■4= 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 = Matnx Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO3O889'7 8

NYC-WTC_000190295