NYC-WTC_000228850

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7698 Filter Type / Fitter Area: MCE 385 mm' Lab Sample #: 17 Grid Opening Size: 0,01124

Client Sample #: 19 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysts Date: 5/11/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Lenglh ID of structure Nor V EDS ■ (Nonadb j No F 8 C M >=05p i>=5fJ Ctirys A/npbiWe Ncmasi) AroOigf'ND No Coord <5m Elements) | I "Z.

t f

1 ______ ______ L______ ~ J J Struct = > O.Sp > 5:1 Aspect Ratio Grid acceptance; Posiiive diffraction pattern properties contorniing to <50% undissolved fiiter, overtapped or folded Totals laboratory iclsntilicatlc^ rrierta observed <10% paraculate coverage >50% coverage ate least 2D unfolded or overtapped grid squares <5% F M I >5u '1- EDS spectrum conforming io laboratory toentification criteria observed holes or opaque areas Chrysotile IAS I 1 AMPHIBOLES Amphibole —i— T F = Single Fiber 0 = Bundle i<3 fibers <1 fiber dlameier apart Amosite CrocidoSite Ambiguous I t C = Cluster i>3 Intersections} Anthophyllite TTon-Asbestos T remolile M = Matrix Actinolite Non-Identified NSD = No Sbuctures Detected

CITY_21MC100_002901794

NYC-WTC_000228850