NYC-WTC_000226138

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ClientNan^ NYC BOE Volume (liters): 1928 Lab Group #: 6338 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 18 Grid Opening Size: 0.01124

Client Sample #: 18 Area Examined: 0.04496 mm'

GREP BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/15/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p Chrys 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

^/= 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_010187139

NYC-WTC_000226138