TEM asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 5844 Filter Type / Filter Area: MCE 38,5 mm’ Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 6 Area Examined: 0 04496 ---------------------- mm- GRID BOX: £V7 Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/7/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor 7 EDS

No Coord No F B cM >=05 p <5p >=5p Chrys Amphibole Nonasb Ambig/ND (Nonadb Elements)

aZ^

G

Struct = > O.Sp, > 51 i Aspect Ratio Grid acceatance;

y = Positive diffraction pattern properties canforming to <50% undissolved filter, overlapped or folded Totals ■=10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M =■50 n'= EDS spectrum contorming to laboratory holes or opaque areas identification 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 M = Matrix Non-Identified Actinolite NSD = Nd Structures Detected

CONFIDENTIAL, CITY_21MC100_003459131 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT, 2008

NYC-WTC_000179413