NYC-WTC_000228580

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE V'olume (liters): 1S08 Lab Group #: 7479 Filter Type / Filter .Area: MCE ?85 mm- Lab Sample #: 15 Grid Opening Size: 0.1)1124

Client Sample #: 17 Area Examined: 0.04496 mnr

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

Analysis Performed By; ROMAN PEYSAKHOV

GO. T Structure Structure Type Length lb of Structure N or No >=05 (J Amphibote Nonasb Ambig/ND ! Conad„ F B ; C M >=5|j Chrys I Elements) , No Coord <5u za zm

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties confomting to <50% undissolved filter, overiapped or folded Totals <10% particulate coverage >50% coverage ate laboratory idenbftcabon criteria observed least 20 unfolded or overiapped gnd squares <5% I F rB I C i M , >/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i r zXMPHlBOLES 1—1 Amphibole F = Single F Per Amosite B = Bundle (<3 ‘ibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos j T remolite M = Matrix Actinolite Non-Identified | NSD = No Structures Detected

CITY_21MC100_002901065

NYC-WTC_000228580