NYC-WTC_000190900

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7588 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 1 Area Examined: 0.04496 mnr GRIP BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/30/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of structure N or V EDS No (Nonadb F B C M >=05 M >=5^J Ctirys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance; Positive diffraction pattern properties conforming to <50% undissolved filter, Overlapped 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 >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES i Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Actinolite ' Non-Identified NSD = No Structures Detected

CITY_21MC100_003089974

NYC-WTC_000190900