TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7291 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area E.vamined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed Bv: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure \ or EDS i No (Nonadb i F B C M >=05 p :>=5|J Chrys Amphibole Nonasb Ambig/ND Elements) ! No Coord <5u

f V2- .7, jL/g /) if

Struct = > O.bp > 5; I Aspect Ratio Gnd acceptance: \'= Positive diffraction pattern properties conforming to <50% undissolved RIter, overlapped or folded Totals iaboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% / I F v= EDS spectrum conforming to laboratory holes or opaque areas iaentification criteria oosen/ea Chrysotile .AMPHIBOLES Amphibole । F = Single Fiber Amosite 3 = 3undle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous 1 C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix ! Non-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470760 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176719