TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NAG BOE Volume (liters): 1936 Lab Group #, bO78 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: 12/11/01

Analysis Performed By; ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure Nor T EDS No (Nonadb F B C M >=05 p i •=5p Chrys ' Amphibole Nonasb i Ambig/ND No Coord <5p Elements)

/y

(—1

Struct = > 0,5p > 5: i Aspect Ratio Grid accepiance; Positive diffraction pattern properties contorming to <50% undissolved filter, overlapped or folded Totals laboratory identification criterta observed <10% particulate coverage >50% coverage ate

EDS spectrum conforming to laooratory identification criteria observed least 20 unfolded or overlapped grid squares <5% holes or opaque areas Chrysotile LB 1 C M >5|j

i AMPHIBOLES j Amphibole p = Single Fiber i Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSC = No Structures Detected

CITY_21MC100_003104681

NYC-WTC_000184138