NYC-WTC_000202429

NYC 9/11 Public Portal Document

TEM Asbestbs (air) Count Sheet Client Name: NYC BOE Volume (liters); 1920 Lab Group #: 9088 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #; 2 Grid Opening Size: 0.01124 1 Client Sample #; 2 Area Examined: 0.04496 mm^ I GRID BOX: GRID ID: /W Magnification^ 20,000 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/11/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length Id of Structure Nory EDS (Nonadb No F B C M >=05 p >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

r G VW tf (I

Photo No. (trom 1 in 5 asbestos containing samples) Grid acceptance; Struct = > 0.5|j > 5;1 Aspect Ratio Totals <50% undissolved filter, overlapped or folded V = Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5p holes or opaque areas ^/= EDS spectrum conforming to laboratory Chrysotile identification criteria observed AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) j Anthophyllite r Non-Asbestos ' Tremolite , M = Matrix Non-Identitied Actinolite 1 NSD = No Structures Detected

CITY_21MC10 0_0 03 2 72 63 7‘

NYC-WTC_000202430