NYC-WTC_000211926

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volnme (liters): 1832 Lab Group #: 7317 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124

Client Sample #: 18 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/3/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID ofStnjcture Norv EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND ' No' Coord <5|J Elements) !-----1---------

Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory idenbfication criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C 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 ' T remolite M = Matrix Non-Identified , Actinolite NSD = No Structures Detected

CITY_21MC100_002865983

NYC-WTC_000211926