NYC-WTC_000201193

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1805 Lab Group #: 7924 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mn’

GRID BOX: Magnification: 20,000 . GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/1/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS (Noradb No F B C >=05 p i>=5pi Chrys Amphibole Nonasb Ambig/ND i No Coord Elements) <5pi

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: Positive dlffraciion pattern properties conforming to “"dissolved 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 .G M >5u '/= 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-ldentified Actinolite NSD = No Structures Detected

CITY_21MC100_011275456

NYC-WTC_000201205