NYC-WTC_000218194

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7110 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0.04496 mm* GRID BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/17/02

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)

J

Struct = > 0.5 H .> 5; 1 Aspect Ratio Grid acceptance: >/= PosMve difiracCon pattern properties conforming to <50% unsolved fflter, overtap^d or folded Totals ~ r, r laboratory identification crtteria observed m <10% particulate coverage >50% coverage ate least 20 unfoWed or overlapped grid squares <5 % F I B ; c M i EDS spectrum conforming to laboratory holes or opaque areas identiricadon criteria observed Chrysotile AMPHIBOLES i Amphibole r = Single Fiber Amosite i B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Non-1dentified NSO = No Structures Detected Actinolite J.

CITY_21MC100_000466046 NYC-WTC_000218194