NYC-WTC_000230167

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (Titers'): 1952 Lab Group #: 6491 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 8 Area Examined: 0.04496 mm" GRID BOX: Magnification: 20,000 GREP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/28/02

Analysis Performed By: MARKPEYSAKHOV

GO. 1 Structure Structure Type Length IDNSturture NorV EDS No >=05 p (Nonadb F B C M >=5p Ctirys Amphibole Nonasb AmbigZND No Coord <5p Elements) f

Struct = > 0.5(1 -> 5:1 Aspect Ratio Grid acceptance: ^= Positive diffraction pattern properties conforming to '^^0% undissolved filter, overlapped orfolded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle {<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix •Tremolite Actinolite Non-Identified NSD = No Structures Detected'

CONFIDENTIAL, CITY_21MC100_003388866

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230167