NYC-WTC_000192444

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters); 1920 Lab Group #: 7571 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined; 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID; Accelerating Voltage; 100 KeV # Grid Openings: 4 Analysis Date: 4/23/02

Analysis Performed By: MARKPEYSAKHOV

GO. Structure Structure Type Length ID of Stnjcture N or EDS No (Nonadb F B C M >=05 p >=5(j Chrys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

Struct = > 0.5p ->5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to <50% undissotved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded or overlapped grid squares <5% F B C M >5p •/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile I AMPHIBOLES { Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) ’ Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CITY_21MC100_003092708

NYC-WTC_000192444