TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6479 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: J Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0,04496 mm- GRID BOX: Magnification: 20,000 GRID ID: 2^^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/27/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure iCory EDS (Nonadb No F B C M >=05 M >=5p Chrys .'tmphibote Nonasb Ambig/ND No Coord <5u Elements)

f 1/ // 5ZxS //

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance;

■V= Positive diffraction pattern properties conforming 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 >5p EDS spectrurn conforming to laboratory holes or opaque areas identification criteria lobserved Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite ; Non-Asbestos T remolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467569 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180810