TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: N^'C BOE V olume (liters): 1952 Lab Group #: 6010 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 9 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/1/01

Analysis Performed By: MARK PEYSAKHOV

oU. Structure Structure Type Length ID of Structure N or EDS No (Nonadb F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND Elements) No Coord <5,p

"A ! <3 <3 >

i I 1—

Struct = > 0.5.U -> 5:1 Aspect Ratio Grid acceptance: \'= Fositive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C i M >5u N= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observe: Chry'sotile j AMPHIBOLES Amphibole | F = Single FiOer Amosite c = Bundle '<3 fibers <' fiber diameter apart Crocidolite Ambiguous i C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix Actinolite Nor-Identified j NSC = No Structures Detected J .

CITY_21MC100_003104427

NYC-WTC_000183973