NYC-WTC_000230225

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 6549 Filter Type / Filter Area: ,MCE 385 mm^ Lab Sample #: 2 Grid Opening Size: 0,01124 Client Sample #: 2 Area Examined: 0.04496 mm^ ■ GRID BOX: '7^ Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/3/02

Analysis Performed By: 43P ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS No >=05 u (Nonadb F B C M >-5p - Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

TH ____ a

50 i

Struct = > 0.5|i >5:1 Aspect Ratio Grid acceptance: 'J= 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 overiapped grid squares <5% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile rAMPHIBOLES”^ Amphibole F = Single Fiber Amosite I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite, Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITy_21MC100_003388947 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230225