NYC-WTC_000192011

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volnme (liters): 1928 Lab Group #: 7732 Filter Type / Filter Area; MCE 385 mm" Lab Sample #: 18 grid Lsj.H.ll.tJ Size: 0.01124 Client Sample #: 18 Area Examiped: 0.04496 mm"

GRID BOX: // Magnification: 20,000 GRIDJD: 2^ Accelerating Voltage: 100 KeV # Grid Openings; 4 Analysis Date; 3/13/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length 10 of Structure Norv EDS (NonadD No F B C M mOS-m >=5p Chrys AmpNbole Nonasb AnbigMO Coord <5p Elements)

/SI; i

Struct = > 0.5(1 >5:1 Aspect Ratio Grid acceptance: ■7 = Positive diffraction pattern properties conforming to *50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particutete coverage >50% coverage ate least 20 unfolded or ovedapped grid squares <5% F B C M >5m 'I- EOS spectrum conforming to laboratory ■ tides or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole Single Rber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Delected

CITY_21MC100_003092084

NYC-WTC_000192011