TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 6933 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 19 Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: ■Vlagnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/5/02

Analysis Performed By: ROMAN PEYS.AKHOV

GO. Structure Structure Type Length DofStructure Nor y EDS (Nonadb No C M >=05 J Chrvs i Amohiboie - Nonasb Ambig/ND F ! B ■=5p Eiements) No Coord <5p t/^i 3?

zz

------- J..-

Struct = > O.bu > >! I Aspect Ratio Grid acceptance!

v= Positive diffraction pattern properties contorming to <50% unaissoived filter, overlapped or folded Totals <10% oarticuiate coverage >50% coverage ate taboratory identification criteria obsen/ed least 20 unfolded ar overlapped gnu squares <5% F I B I C i M > V= EDS spectrum conforming to laporatory holes or opaque areas identification criteria observed Chrvsotile .A.MPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambimious C = Cluster (>3 Intersections) Anthophyllite Non-.Asbestos Tremolite M = Matrix Actinolite Mon-ldeiitified NSC = No Structures Detected

CITY_21MC100_0 03102292

NYC-WTC_000183227