TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume /liters): 1928 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #.• 8 Grid Opening Size: 0,01124 Client Sample #: Area Examined: 0.04496 mm-

GRIP BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By; ROMAN PEYSAKHOV

■ GO. Structure Structure Type Length ID of structure N or -/ EDS (Nonadb No F B C >=0S p Chrys Amphibole Nonasb Ambig/ND N6 Coord Elements) <5p

34^ 322^ 7^ sX—

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 >5u vf= EDE spectrum conlorming to laboratory holes or opaque areas identification criteria observed Chrysotile ,'amphiboles ; Amphibole F‘: Single Fiber Amosite ! 6 = Bundle (<5 fibers <1 hhar diameter apart Crocidolite i Ambiguous ■C -Cluster (>3 Intersections) Anthophyllite ! Non-Asbestos M = Matrix NSD = No Structures Detected T remolite Actinolite ...J i Non-Identified

CONFIDENTIAL, CITY_21MC100_003430361 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175143