NYC-WTC_000190370

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7283 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 4 Area Examined: 0.04496 mm’ GRIP BOX: Magnification: 20,000 GRIPED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 3/31/02

Analysis Performed By: MARK PEYSAKHOV

GO. i Structure Structure Type Length ID of Structure N or V EDS (Nonadb i No F B C M >=05 u >=5p Chrys Amphibole Nonasb Ambig/NO No Coord <5m Elements)

Struct = >0.5p > 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 overiapped grid squares <5% F B C M >5p ^/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES । Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite NomAsbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003089250

NYC-WTC_000190370