NYC-WTC_000229385

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume filters); 1808 Lab Groap #: 8267 Filter Type / Filter Area: MCE 385 Lab Sample #: 16 Grid Opening Size: 0.01124

CUent Sample #: 18 Area Examined: 0.04496

GRID BOX: Magnification: 20/ass GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 6/24/02

Analysis Performed By; ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS {Nooadb No F S C M >=05 u >~5m Chrys Amp/iibob Nonasb Amtxgy'ND No Coord <5m Eiements)

/W

Struct = > 0.5p > 5; 1 Aspect Ratio Grid acceptance: 'J-Positive diffraction pattern properties conforming to <50% undissolved titter, overlapped or folded Totals laboratory identification criteria observed <10% parfculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p V= EOS spectrum conforming to laboratory holes or opaque areas iderttificafon criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 Abets <1 Aber diameter apart Crocidolita Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix AcUnolite Non-Identified NSD = No Structures Detected

CITY_2IMCl00_000492074 NYC-WTC_000229385