NYC-WTC_000203557

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Same: NYC BOH Volume (liters): 1952 tab Group #: 8745 Filter Type / Filter Area: MCE 385 mm- Lak-SampleJ^ Grid Opening Size: 0.01124 . Client Sample #: 7 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/24/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 3 EDS : No (Nonadb ' F B C M >=05 pi >=5m Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5u --------- j

---------- .3D

Struct = > 0.5^1 ■■■’ 5:1 Aspect Ratio Grid acceptance:

y= Positive diffraction pattern properties conforming to <50% undissolved filter, auerrapped 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 ; >5u \'= EDS soectrvm conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole r = Single Fiber Amosite B = Bundle i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster '>3 intersections) Antbophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003058622

NYC-WTC_000203557