NYC-WTC_000215527

NYC 9/11 Public Portal Document

TEM x-lsbestos (air) Coyaat Sheet Client Name: NYC EO£ Voiume (liters): I 340 Lab Group #: 683! Filter Tvpe / Filter Area: MCE 335 mm- Lab Saippie #: 4 - Grid Opening Size: 0.01 124

Client Sample #: TO7 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/25/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type . Length ID of Structure N or v EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)' ) ---------------- 1

-3 ,>

Struct = > 0.5p .>5:1 Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properties conforming to <50% undissoived filter, overiapped or folded Totals laboratory Identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p v= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSO = No Structures Detected

CITY_21MC100_002872522

NYC-WTC_000215527