NYC-WTC_000224236

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7457 Filter Type / Filter Area: MCE 385 mm^ Lab Sample 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/18/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 4 EOS No >=05 p (Nonadb F B C M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

<3

Struct = > 0.5|j. > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern propertes conforming to ^50% undissolved filter, overiapped or folded Totals laborator/ identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M ’5m A- EDS spectrum conforming to laboratory holes or opaque areas 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 M = Matrix Tremolite Actinolite Non-Identified NSO = No Structures Detected

CITY_21MC100_002892845

NYC-WTC_000224236