TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: WC BOE Volume (liters): 1928 Lab Group #: 6078 Filter Type / Filter Area: MCE 385 mm= Lab Sample rf: 17 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/11/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure I Structure Type Length ID of Structure NorN EDS No Pf B C M >=05 pi :>=5p Chrys Amphibole Nonasb ' Amoig/ND (Nonadb No Coord <5p Elements)

±3 1/ '2

Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: /- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% v= EDS spectrum conforming to laboratory identification critena observed notes or opaque areas _____ LI Chrysotile ’ B i C M >5u

i AMPHIBOLES • Amphibole ) F = Single ~ber Amosite 0 = Bundle (<3 fibers <1 liber diameter apart Crocidolite Ambiguous C ■ Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified j Actinolite N3D = No Structures Detected

CITY_21MC100_003104679

NYC-WTC_000184136