NYC-WTC_000228579

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7479 Filter Type / Filter Area: MCE 385 tnm- Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Maenification: 20,000 GRID ID; Accelerating Voltage: 100 KeV Grid Openings: 4 Analysis Date: 4.20/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V £CS , No (Nonadb ' F B C M >=05 p >=5(j Chrys Amphibole Nonasb Ambg/ND No Coord <5m Eemenis)

Struct = > 0.5(1 >5 :1 Aspect Ratio Grid acceptance: >/- Positive ciffraction pattern properties conforming to <50% undissolved fitter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M J >5u >/= EOS speidrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Filoer Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSO = No Structures Detected

CITY_21MC100_002901063

NYC-WTC_000228579