TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 8759 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 10 Grid Opening Size: 0 01124 Client Sample #: 10 Area Examined: 0 04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Perlormed By: ROMAN PEYSAKBOV

GO Structure Structure T ype Length ID of Structure Nory EDS No >=05 pi i>=5pi (Nonadb F B G M Ctirys Amphibole Nonasb Ambig/ND ■ No Coord <5m Elements)

I £ 2 1 *

Struct = > U >51 Aspect Ratio Grib acceptance 7 = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification cnteria observed <10% particulate coverage >50% coverage ale least 20 unfolded or overlapped gnd squares <5% F B C M >5p 3 = EDS spectrum conforming to laboratory holes or opaque areas Identification cntena 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 = Matnx Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3431228

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175487