NYC-WTC_000223718

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 l.ab (iroup #: 7458 E ilter Type / Filter Area: MCE 385 mrr.- Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: -Magnification: 20.000 GRID ID: -Accelerating Voltage: 100 Ke\‘ # Grid Openings: 4 Analysis Date: 4 ! 8 02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length 10 of Structure N or \ No 7 tor 305 F B C M >=05 u Chrys Amptdoote NonasO I Ambig/ND i No Coord <5p Eiemerts;

i I

Struct = > 0.5fu > 5.1 Aspect Ratio Grid acceptance: Positive diffraction pattern oroperties conforming to <50% undissolved filter, overlapped or folded Totals laboraioiy identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% ' F , B i \! EDS spectrum conforming to laboratory holes or opaque areas iflentificaiiori criteria observed Chrysotile : AMPHIBOLES Amphibole : F = Single Fiber Amosite B = aundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ' Tremolite M = Matrix Actinolite ! Non-ldentified NSC = No Structures Detected

CITY_21MC100_002919810

NYC-WTC_000223718