NYC-WTC_000200766

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7651 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 07 Area Examined: 0.04496 mmL

GRID BOX: Magnification; 20,000 GRID ID : Accelerating Voltage: 100 KeV # GxidOpenitig^ 4 Analysis Date: 5/5/Q2

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Sfructure Type Length ID Of structure N or 4 EDS No (Nonadt ■F B'i C M >=05 p : =5p Chrys Amahibole Nonasb Ambig/ND No Coord <5p Elements)

Struct = > 0.5pi > 5:1 Aspect Ratio ' Grid acceptance; 4= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded . Totals laboratory identifcation criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid -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 Amesite E = Bundle (<3 fibers <1 fiber diameter apart t Crocidolite Arnbiguous C = Cluster (>3 Intersections) ; Anthophyllite Non-Asbestos I Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_011275118

NYC-WTC_000200772