Asbestos TEM air sample data sheet, Sample 1, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYCSCA Volume (liters): 1944 Lab Group #: 5801 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm- GRID BOX: Mannification: 20,000 GRID ID : Acceleratinn Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No >=05 pj ; Nonasb (Nonadb F B C M >=5p Chrys Amphibole Ambig/ND No Coord <5u Elements)

-^1*535 r ea.; _li__ U

1 ^1 /I

Struct = > 0.5)1 .> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved 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 >5)J t/= EDS spectrum confornning to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES • Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersectioris) Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003100033

NYC-WTC_000182616