TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8226 Filter Type / Filter. Area: MCE 385 mm^ Lab Sample #: 5 Grid Opening Size: 0.01124

Client Sample #: 5 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/23/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type • Length ID of structure Nori EDS (Nonadb No F B C M >=05 p -I :>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

zzSzz 5

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: . ■ a/= 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 n/= 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 Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_0 03105890

NYC-WTC_000184996