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 #: 6990 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 5 Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.04496 mm-

GRID BOX: M agnification: 20,000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/9/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Mor xf EDS , iNonadb No F B C >=05 p >=5p Chrys Amphibole Nonast Ambig/ND No Coord Elements)

A

Struct--- Dou --51I Aspect Ratio Grid acceptance

u = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% paniculate coverage >50% coverage ate laborato.y identification criteria observed least 20 unfolded or overlapped grid squares <5% ! F B I C I M j >5p v = EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ) AMPHIBOLES Amphibole F = Single -iber Amosite B = Bundle i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Son-Asbestos Tremolite M = Matrix Non-Identificd Actinolite SSD = Mo Structures Detected

CITY_21MC100_003102380

NYC-WTC_000183280