TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 192S Lab Group #: 6078 Filter Type / Filter Area. MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: Area E.\amined: 0,04496 mm- GRID BOX: /Jj Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/11/01

.Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or N EOS No B C M tct/z r~ ■=5p Chrys Amphibole Nonasb | AmbigfND (Nonadb No Coord <5p Elements)

lXt I r

Strut: = > 0.5p > 5;l Aspect Ratio Grid acceptance;

Bcsitive diffraction pattern properties conforming to <50% undissolved filter, overlapped cr folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M ^5|J r/= EDS spectrum contorming 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 Intersecticns) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-Identified Actinolite CSC = Mo Structures Detected

CITy_21MC100_003104669

NYC-WTC_000184126