NYC-WTC_000230153

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1936 Lab Group #: 6464 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 21 Grid Opening Size: 0.01124

Client Sample #: 21 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: ^29 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 NorN EDS No (Nonadb F B C M >=05 p >=5|j Chrys Amphibole Norasb Ambig/ND No Coord <5p Elements)

// r /I

Sruct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory idenlification criteria observed <10% particulate coverage >50% coverage ate

>/= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas ■ F B c M >5p

identification criteria observed Chry'sotile 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-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388817 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230153