NYC-WTC_000208348

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8759 Filter Type / Fil er Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 12 Area E Kamined: 0.04496

GRID BOX: Magnification: 20,000 GRID JD: Accelerating Voltage: 100 KeV # Grid Openings: 4 Anal . sis Date: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS (Nonadb .No Coord No F B c M 1 I >=05 p <5u >=5iJ Chrys : Amphibole Nonasb Ambig/ND Elements)

41 — I? ~7r~

Struct = > O.Sp > 5:1 Aspect Ratio Grid acceptance: y'= 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 gnd squares <5% F B C M >5p ■ 7= EDS spectrum contonriing to laboratory holes or opaque areas identification criteria observed Chrysotile j AMPHIBOLES Amphibole F - Single Fiber Amosite B = Bundle (<3 fibers <1 liber diameter apart Crocidolite Ambit uous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003021684

NYC-WTC_000208348