TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7381 Filter Type / Filter Area: MCE 385 miri- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm- GRID BOX: /£27 Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/11/02

Analysis Performed By: /vr ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure N or x/ EOS I No F B C M >=05 p :>=51J Chrys Amphibole Nonasb Amb^/ND No Coord <5u Elements)

/ft" V -I Y' I

Struct = > 0.5p > 5:1 A.spect Ratto Grid acceptance:

y = Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or.overlapped grid squares <5% F B C I M I >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsenzed

F = Single Fiber AMPHIBOLES Amosite Chrysotile Amphibole 4. L B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470982 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176867