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 #: 6191 Filter Type / Filter Area: MCE 385 mm* . LabSample^ 15 Grid Opening Size: 0,01124 Client Sample #: 15 Area Examined: 0.04496

GRID BOX: / Magnification: 20,000 GRID It): Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/24/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or y EDS No (Nonadb F B C >=05 (J : -5[J Chrys j Ampriibole Nonasb Ambig/ND No Coord <5u Elements)

TQ 6/

70 —

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

V= Positive diffraction pattern propenies conforming to <50% undissolved filter, overlapped or folded Totals laOoratory identification criteria observed <10% particuiafe coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% " F B C M >5p EDS spectrum confonning to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003105055

NYC-WTC_000184398