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): 1920 Lab Group #: 6068 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/9/01

Analysis Performed By: / ROMAN PEYSAKHOV

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

'4S 2

I ■

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptarice: <= Positive diffraction pattern properties conforming to ^50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ale laboratory identification criteria observed A- EDS spectrum conforming to laboratory least 20 unfolded orovertapped grid squares <5% F I B C i M >5u holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES i Amphibole F = Single Fiber Amosite , B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos ] - i Tremolite J— M = Mafnx Non-Identified NSD = No Structures Detected Actinolite I j L

CONFIDENTIAL, CITY_21MC100_003467401 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180700