NYC-WTC_000228866

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters^: 1800 Lab Group #: 7717 Filter Type / Filter Area: MCE 385 mm* Lab Sample 17 Grid Opening Size: 0.01124

Client Sample #: 20 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRID ID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/11/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length IDofStnictuie N or I I Wo -'=05 p" ~>-5u Nonasb {Noftadb i F B C M Chrys Amphibole Ambtg/ND Elements) [ No_ Coord <5m

is II

I

1 4 I

Struct = 0.5p > 5; 1 Aspect Ratio Grid acceptance; </= Positive diffraction pattern properties conforming to <60% undissotved filter, overlapped or folded Totals iatwratory tfleittiftcatiort cnteoa observed <10% pardculata coverage >50% coverage ate least 20 unfoded or overlapped grid squares <5% F B C M 1 >5p EDS spectrum conforming to laboratory identification criteria observed holes or opaque areas

AMPHlBOLbS Chrysotile Amphibole ztz F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite W = Matrix Actinolite Non-Identified NSD = No Structures Defected

CITY_21MC100_002901818

NYC-WTC_000228866