NYC-WTC_000203445

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client >iame: NYC BOE Volume (liters): 1904 Lab Groiip #: 65 72 Filter Type / Filter Area: MCE 3S5 n-tm- l.ab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0 04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2'6/02

Analysis Performed By MARK PEYSAKHOV

GO Structure Structure Type j Length ID of Structure N or v EDS INonaab No ■ F B C M >=05 u >=5p Chrys ' Ampniboie I Nonasb AmOig/ND Elements; So Coord <5u

3

Strut : = n- 1) <p ■ 5; 1 Aspect P.atio fird acceptance:

v= Positive diffraction pattern properties conforming to <53% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate iaoorator/ identification criteria ooserved least 20 unfolded or ovenapped grid squares <5% [ F . B i C I M I Gsu \'= ECS spectrum conforming lo laboratory holes or opaque areas identifiatioi criteria observed Chrysotile I AMPHIBOLES Amphibole ’1 F = Single Fiber Amosite B = Bunoie (<2 fibers <1 fiber diameter apart Crocidolite Ambiguous j C = Cluster (>3 Intersections) Anthopfiyllite Non-Asbestos : Tremolite M = Matrix I Non-identified Actinolite NSD - No iSiruciures Detected

CITY_21MC100_003068252

NYC-WTC_000203448