TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Conamt Sheeit Client Name: NYC BOE Volume (liters): 1680 Lab Group #: 7407 Filter Type / Filter Area: MCE 385 mm- Lab Sample 2 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.0562 mm^

GRtD BOX: Ml? Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 5 Analysis Date: 4/13/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Siructure Structure Type Length ID of Siructure Nor 'I EDS (Nonadb No F B C M >=05 M >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

All jcL. 2 7, ^2. 5 - -■___ J

/MS A ZZ

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: 4 = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate feast 20 unfolded or overlapped grid squares <5% F B C M >5U >/= EDS spectrum conforming to laooratory 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 Intersections) ; Anthophyllite Non-Asbestos I Tremolite M = Matrix Non-tdentified I Actinolite NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_0 09505432 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178907