NYC-WTC_000228930

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume niters): 1800 Lab Group #: 7750 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 15 Grid Opening Size: 0 01124 -Client Sample #: 17 Area Examined: 0.04496 tnm" GRID BOX: Magnification: 20 nW GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V eos (Nonadb No F B C M «Q5p >=5|J Chrys Amphibole Nonasb I Ambig?ND <5m Elements)

zfs

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: •J- pQsiSvB diffraction pattern properties conforming to <50% undiMotved Alter, overtapped or folded Totals laboratory idenrtfleation criteria ooserved <10% paniculate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5u • '/= EOS spectrum conforming to laboratory holes Of opaque areas . identiflcaDon criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Rber Amosite B = Bundle (<3 Abers <1 Aber diameter apart Crocidolite Ambiguous C * Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix AcAnoiite Non-Identified NSO = Alo Structures Cetected

CITY_21MC100_002901912

NYC-WTC_000228930