TEM Asbestos air sample results, NYC BOE, Apr 25 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Vi line (liters): 1832 Lab Group #: 7539 f’iltei Type Luter Area: MCE 385 mm^ Lab Sample #: 8 Gn(L: tiing Size: 0.01124

Client Sample #: 11 An : .\amined: 0.04496 mm^

GRID BOX: > ' .iaificatioii: 20,000 GRID ID: Aecelei; h it \ oilage: too KeV # Grid Openings: 4 A:Ivsis Date: 4/25/02

Analysis Pei I t med By: MARK PE’t'SAKHOV

GO. Structure Structu''e Type Length ■ ructure Nor v EDS No (Nonadb F I E C M >=05 p =54 Chrys Amplvr r Nonasb Ambig/ND Elements) I No I Coord I <5m

c-

l-

r-

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

a/= Positive diffraction pattern properties confer- ig to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid sauares <5% F B C M >5p '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed AMPHIBOLES b lie F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite . us C = Cluster (>3 Intersections) Anthophyllite os Tremolite M = Matrix Nie ' ed Actinolite NSD = No Structures Detected

CITY_21MC100_003102066

NYC-WTC_000183071