TEM Asbestos air sample results, NYC BOE, Mar 2 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NVC BOE Volume (liters): 1840 Lab Group #: 6882 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124

Client Sample #: 01 Area Examined: 0.04496 mm-

GRTD BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV it Grid Openings: 4 Analysis Date: 3/2/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure' Structure Type Length ID of Structure Norv EDS No >=0^0 :>=5|j INonadb F B C M Chrys Amphibole Nonasb Ambig/ND No -Coord <5m Elements) -------------- 1

I i I ' Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overtapped grid squares <5% F B C M >5u ■y= 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-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003108374

NYC-WTC_000185724