TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7291 Filter Type / Filter Area: iMCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 Z Aj_ x*' GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS I No (Nonadb | F 8 C M >=05 p Chrys Amphibole Nonasb Ambig/ND ./I No Coord <5tJ Elements) ।

Hr 3 (Q z (I 4

Struct = > O.Pp > 5:1 Aspect Ratio Grid acceptance: 7= 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 I F -I B !I C I1 M I >5p v= EDS spectrum conforming ’o laboratcry holes or opaque areas , I ideniification criteria observed Chrysotile I AMPHIBOLES Amphibole ’ F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous | C = Cluster (>3 intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Non-ldentified Actinolite NSC = No Structures Detected

CONFIDENTIAL, CITy_21MC100_003470765 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176724