TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: N-YC BOE Volume (liters): 1944 Lab Group #: 6066 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 20 Grid Opening Size: 0.01124

Client Sample #: 20 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/9/01

Analysis Performed By: ROMAN PEYSAKHOV

30. Structure Structure Type Length iC of Structure N or 9 EDS (Nonadb No F E C M >=05 p >=5|j Chrys Amphibole Nonasb j Ambig/ND No Coord <5|J Elements)

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance:

N = Positive diffraction oattern properties conforming to <50% undissolved filter, overlappeo or folded Totals laboratory identificatior criteria observed <10% particulate coverage >50% coverage ate

v = EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B I C M >5u identification criteria observed Chrysotile i AMPHIBOLES : Amphibole = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart I Crocidolite Ambiguous C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos ' Tremolite M = Matrix Non-Identifled Actinolite NSC = No Structures Detected

CITY_21MC100_003104653

NYC-WTC_000184116