TEM Asbestos Air Sample Data Sheet #3, June 1, 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume (liters); 1920 Lab Group #: 7925 Filter Type / Filter Area; MCE 385 mm’ Lab Sample #: 3 Grid Opening Size; 0.01124 Client Sample #: 3 Area Examined; 0.04496 mm’ GRID BOX; Magnification; 20,000 GRID ID; Accelerating Voltage; 100 KeV # Grid Openings; 4 Analysis Date; 6/1/02

Analysis Performed By; MARK PEYSAKHOV

' GO. Structure Structure Type Length IDofStnjcture N or V EDS (Nonadb No F B C M >=05(1 ■>=5p Chrys Amphibole Nonasb Ambigrt<ID No Coord <5m Elements)

Struct = > 0.5(1 _> 5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to <50% undissolved 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 >5m ' EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile j AMPHIBOLES Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart I Crocidolite Ambiguous C = Cluster (>3 Intersections) j Anthophyllite Non-Asbestos I Tremolite M = Matrix Non-Identified i Actinolite NSD = No Structures Detected

CITY_21MC100_003105250

NYC-WTC_000184524