TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6091 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 8 Area Examined: 0.04496 mm- GRID BOX: Magnificatiou: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/14/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 9 EDS No Nonasb (Nonadb F B C M >=05 p :>=5)j Chrys Amphibole Ambig/ND No Coord <Sp Elements)

- — 5 — /f —

iSZZUl t

I Struct = > O.ip > 5 1 Aspect Ratio and acceptance: 7= Positive diffraction pattern properties Gonforming to <50% undissolved filter, overlapped 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 7= EDS SDectrum conforming to laboratory holes or opaque areas identification cnteria observed Chrysotile AMPHIBOLES Amphibole .r = Single Fiber Amosite 5 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matnx Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003104758

NYC-WTC_000184191