NYC-WTC_000212409

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ( lient Name: NYC BOE Volume (liters): 1936 L.ab Group #: ■’349 Filter Type / Filter Area: MCE 385 mm- L.ab Sample #: 12 Grid Opening Size: 0.01124 ( lient Sample #: 12 Area Examinetl: 0.04496 mm-

(IRID BOX: Magnification: 20,000 CrRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/7/02

Analysis Performed By: MICHAEL GORYCKI

GO Structure Structure Type Length ID of Structcre N or 7 EDS 1 No (Nonadb F B C M >=05 M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord I <5p Elements)

<■/ J 3 f< -1

:: 3 f/

_J i

Sii'ijct = > 0 5p > 5i I Aspect Ratio Gnd aaeptance:

\ ■= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals Icboratoiy identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5u \ - EDS spectrum conforming to laboratory holes Of opaque areas icentification 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 = Matiix Actinolite Non-ldentified NSD : No Structures Detected

CITY_21MC100_002866414

NYC-WTC_0002 12409