TEM asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NZC BOE Volume (liters): 1952 Lab Group #: 6073 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: J 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: 12/10/01

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure T ype Length ID of Structure Nor 7 EDS (Nonadb i No F B C M >=05 p 77^ Chrys Amphibole Nonasb i AmbiglND No Coord <5p 1 Elements)

z zv — z --

Struct = > 0.5u > 5:1 Aspect Ratio Gnd acceptance:

N= Positive diffraction pattern properties conlorming to <50% undissolved filter, overtapped 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 >5p v'= EDS spectrum conlorming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLY Amphibole F - Single Fiber Amosite B = Bundle l<3 fibers <’ fiber diameter apart Crocidolite Ambiguous-- C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos ' Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003104578

NYC-WTC_000184058