TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NN'C BOE Volume (liters): 1928 Lab Group #: 6117 Filter Type / Filter Area: MCE 385 mnr Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRIP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/15/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID di Structure Norv ECS No Nonasb Ambig/ND (Nonadb F B C M >=05 p >=5pi Chrys i Amphibole No Coord <5p Elements)

1/^ / yz- Avy

/e ■-

Struct = > 0.5p 1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties iconforming to <50% undissolved filter, ovetiapped or folded Totals laboratory identification criteria observec <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B ! C M >5p T= EDS spectrum conforming to laboratory holes or opaque areas ---- i—- identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = cundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite N on-Identified^ NSD = Nc Structures Detected

CITY_21MC1OO_OO31O4818

NYC-WTC_000184232