NYC-WTC_000228807

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7664 Filter Type / Filter Area: MCE 385 Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496

GRID BOX: Magnification: 20 000 GRID IP: Accelerating Voltage; 100 KeV # Grid Openings: 4 Analysis Pate: 5/7/02

Analysis Performed By: MARK PEYSAKHOV

GO, Sbocture Structure Type Length ID of Structure Nor » EDS (Nonadb No F B C M >=05 p >=5p Chrys AmphOwle Non356 Ambig/NO No Coord <5p Elenterls)

Struct = > 0.5n >5:1 Aspect Ratio Gnd acceptance: '/= Prsitive diffraclion pattern properties conforming to <50% andissoNed filter, overlapped or folded Totals iatioraiory identirKalion criteria observed <10% parteutate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p ■>/- EDS spectrum corfonriing to laboratory holes or opague areas identification citena observed Chrysotile AMPHIBOLES Amphibole F = single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actirrrolite Non-Identified NSO = No Structures Detected

CITY_21MC100_002901721

NYC-WTC_000228807