NYC-WTC_000224150

NYC 9/11 Public Portal Document

TEMAsbestosfairlCount Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7391 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample ft: 12 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/13/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: 'J- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded or overlapped grid squares <5% F B C M >5m '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos 1 T remolite M = Matrix Non-Identified I Actinolite i NSD = No Structures Detected

CITY_21MC100_002892729

NYC-WTC_000224150