NYC-WTC_000200750

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7638 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 09- Area Examined: 0.04496 mrrr GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/4/02 .

Analysis Performed By; ROMAN PEYSAKHOY

- . GO. Structure Structure Type Length ID of Structure Norv EDS ' No (Nonacb F B C M >=06 p >=5iJ Chrys Amphibole ( Nonasb Ambig/ND <5p Elemens)

'r V 4 f.'

Struct = > G.5p > 5:1 Aspect Ratio Grid accsptance: J= 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 F BT C M >5p V= EDS spectrum conforming to laboratory holes or opaque areas L identification criteria observedr Chrysotile ■ amphiboles j Amphibole F = Single Fiber' Amosite I B = Bundle !<3 fibers <1 fiber diameter apan Crocidolite r Ambiguous ‘ C = Cluster{>3 intersections) ■ Anthophyllite i Non-Asbestos Tremolite - M = Matrix Actinolite ) Non-Identified NSD = No Structures Detected

CITY_21MC100_011275098

NYC-WTC_000200758