TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: BOE Volume (liters): 1952 Lab Group #: 7020 Filter Type / Filter Area: MCE 385 Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm^

GRID BOX: Ma2nification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/10/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M '=5p Chrys Amphibole Nonasb | Ambig/ND No Coord <5u Elements)

) I 1 1

Struct = > O.Sp >5:1 A.spect Ratio Grid acceptance: y= Positive diffraction pattern proper^es conforming to "50% undissolved filter, ovehapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

v/= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% Fl B c M >5u holes or opaque areas identification critena observed Chrysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Bluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-Identified Actinolite I. . NSD = No Structures Detected

CITY_21MC100_003102427

NYC-WTC_000183294