NYC-WTC_000200197

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: OTCBOE Volume (liters): 1908 Lab Group #: 5919 Filter Type / Filter Area: MCE 385 Lab Sample #: 12 Grid Opening Size: 0 01124

Client Sample #: 12 Area Examined: 0.04496 mm-

GRjDD BOX: Magnification: 20,000 GRID ID : 7^^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/18/01

Analysis Performed By: ROMAN PEYSAKHOV

i GO. Structurs Structure Type Length ID of Structure N or N EDS {Nonadb i r ~ No F B c >=05 M >=5)j Chrys Amphibole Nonasb Ambij/ND i No i Coord <5p Elements)

2^ Cl A ' PI II

76

I I - I struct = > 0.5 p > 5:1 Aspect Ratio Grid acceptance: 'I = Positive diffraction pattern oroperties conforming to undissolved filter, overlapped or folded Totals laboratoy IdentlfiGation criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F i BJ C M >5p ■'1= EDS spectrum oonforming to laboratorr holes or opaque areas idenffioation criteria observed Chrysotile 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-Identified Actinolite NED = No Structures'Detected

CITY_21MC100_003266774

NYC-WTC_000200197