Asbestos fiber analysis results, H.S. of Economics & Finance, Apr

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7351 Filter Type / Filter Area: MCE 3S5 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/7/02

Analysis Performed By: __ MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb ‘ No F B C M ■=5p Chrys Amphibole Nonpsb Ambig/ND E'emerts) Coord <5p

A/5^ 4

VO -

Struct = > 0.5p >5:1 Aspect Ratio Gnc acceptance: N Positive diffraction pattern properties conforming to <60% jndissolved filter, overlapped or folded Totals <10% particu.ate coverage >50% coverage ate laboratory identification criteria oasened

EDS spectrum conforming to laborato^ least 20 dtifoided or overlapped grid squares <5% holes or opaque areas ______ P B C M >5u

identification 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 Tremolite M = Matrix I Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003459964 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179559