Asbestos air sample data sheet, Lab Sample #14, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1936 Lab Group #: 7175 Filter Type / Filter Area: MCE 385 mnr Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm* GRID BOX: Magnification: 20 000 GRID ID: xg? c Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/23/02

Analysis Performed By: MARK PEYSAKHOV

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

■------ - ■ Jr g* -------------------- ------------------------------

jr z'-x

Struct = > 0.5)1 >5:1 Aspect Ratio Grid acceptance; V= Positive diffraction pattern properties conforming to <50% undissolved filter, 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 /= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chiysotile AMPHIBOLES i Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03466995 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180438