TEM Asbestos air sample results, NYC BOE, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 5827 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 3 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: MS Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By; ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS {Nonadb No F B C >«05u j I>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5|J Elements)

f 3^ Xu s 5

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

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B c M >5u holes or opaque areas identification criteria observed Chrysotile r amphiboles'''I Amphibole F - Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite 1 . Non-Asbestos Tremolite M = Matrix I Non-Identified Actinolite NSD = No Structures Detected ______ _____ J

CONFIDENTIAL, CITY_21MC100_003459037 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179363