TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet ClientNam^ NYC BOE Volume (liters): 1928 Lab Group #: 7274 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0,01124 Client Sample #: 4 Area Examined: 0,04496

GRIP BOX: Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/30/02

Analysis Performed By: / yn 7^ ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No

J F B C M >=05 p >=5p Chrys Amphitjole Nonasb AmbigyND No Coord <5p Etemenb) ■■KVUVIl

J gs =

Struct = > O.Sh >5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to *^0% undissofved filter, overfap^ or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m ■/= EDS spectrum confomiing 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 NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467217 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180597