NYC-WTC_000230132

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6429 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb F B C >=05 p >=5pi Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

±31: It

•I

! 1

Struct = > 0,5p > 5:1 Aspect Ratio Gn'd acceptance: A- Positive diffraction pattern properties conforming to <50% undissolved fillet, overlapped 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 >5p N= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i amphiboles' j Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) , Anthophyllite Non-Asbestos I Tremolite M = Matrix Non-Identified Actinolite ' NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388783 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230132