TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6078 Filter Type / Filter Area: MCE 385 ram- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 3 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRID n>: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/1 LOI

Analysis Performed By: ROMAN PEYSAKBOV

GO. Structure Structure Type j Length ID of Structure Nor 7 EDS (Nonadb No 8 C M ’ ^=05 p Chrys | Amphibole Nonasb Ambig/ND No Coord <5p Elements)

23^ i

/W7 i

J i_

Struct > 0.5u > 5 I Aspect Ratio brid acceptance:

v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboraiory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded oroveriapped gnd squares <5% 7= tCS spectrum conforming Io laboratory F B C Ml Yp holes or opaque areas identification criteria observed

F < Single Fiber AMPHIBOLES Amosite Chrysotile Amphibole 4= B = Bundle (<3 fibers <1 finer diameter apart Crocidolite Ambiguous C = Cluster l>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite ' Non-Identified NSD = No Structures Detected

CITY_21MC100_003104665

NYC-WTC_000184123