TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 700! Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm' GRID BOX: Mamiification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Gritl Openings: 4 Analysis Date: 3/9/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type j Length ID of Structure \ or 7 EDS ; ' No Amphibole \ Nonasb (Nonadb F B C M =05 p. I >=5p Chrys Ambig/ND No C ould I <5m Elements)

t------- 1 i

n

Struct > 5 1 Aspect Ratio Grid accebiance

/= Positive ii‘f;,ic:ion pattern properties conforming to <50% undissoivec filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory icienti'ication criteria observed least 20 jnioicec or overlapped grid souares <5% i" C S M j >5u V- EDS specirnin conforming to laboratory boles or opaque areas identification cniena observed Clirvsotile AMPHIBOLES .Ampinbole F = Single - bsi Amosite B = Bundle 'C ypers <1 fiber diameter apart Crocidolite Ambieuous C = Cluster . A; intersections! Anthophyllite Xon-Asbestos Tremolite M = Matrix Ncin-ldentit'ied Actinolite NSD = No as Delected

CITY_21MC100_003102411

NYC-WTC_000183290