NYC-WTC_000190791

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOL Volume (liters): 1960 Lab Group #: 7525 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV Grid Openings: 4 Analysis Date: 4/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=05 u >=5|j Chrys Amphibole Nonasb AmbigZND No Coord <5m Elements)

7/^ J 77 y pz.

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties contorming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5p

identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003089816

NYC-WTC_000190791