NYC-WTC_000219796

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7234 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3,27/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length 10 of Structure N or y EDS (Nonacb No F B C M >=05 M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord '5m Elemens)

27Z

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% i F ! B ' C ' M i >' v= EDS spectrum conforming to laboratory holes or opaque areas ------------ 1___ L___ !___ I__ :__ identifkaton criteria observed Chrysotile i ! A.MPHIBOLES •Amphibole j F : Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous { C = Ciustar (>3 intersections! Anthophyllite Non-Asbestos j Tremolite M = Matrix Actinolite Non-Identified j NSD = No Structures Detected

CITY_21MC100_002881662

NYC-WTC_000219796