TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ' Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 6735 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 18 Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/19/02

Analysis Performed By: ROMAN PEYSAKHOV

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

7 Cf a

Struct = > 0.5u > 5:1 Aspect.Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particuiate coverage >50% coverage ate least 20'unfolded or overtapped grid squares <5% N= EDS spectrum conforming to laboratory holes or opaque areas ______ p B j C M >5u

identification criteria observed Chry'sotile AMPHIBOLES Amphibole ■ = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameier apart Crocidolite Ambiguous ; C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ' Tremolite M = Manx Non-Identined j Actinolite NSC = No Structures Detected

CITy_21MC100_003103327

NYC-WTC_000183827