TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1899 Lab Group #: 6021 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm-

GRIP BOX: 67/ Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/3/01

.Analysis Performed By: ROMLAN PEYSAKHOV

GO. structure Structure Type Length ID of Structure N or EDS (Nonadb i No F B M >=05 (J Chrys Amphibole Nonasb AmDig/ND No Coord <5u Elements) ;

/£ r Jig ___ 7 /) -4__ —

r (

! ! 1

I [ Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B M >5u V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed CEry'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-Identified NSD = No Structures Detected Actinolite 11

CONFIDENTIAL, CITY_21MC100_003467362 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180681