NYC-WTC_000208241

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 8828 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0.01124

Client Sample #: 16 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/10/02

.Analysis Perb rmed By: MARK PEYSAKHOV

GO Structure Structure Type Length D of structure Nor EDS (Nonadb i No F B C M >=05 p : -5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) i <5p

Struct O.Sp > 5 I .Aspect Ratio Grid acceptance

v = Positive diffraction pattern prcpenies conform ng to <50% ijndissolvea filter, overlapped or folded Totals <10% particulate coverage >50% coverage ale laboratory identification criteria observed least 20 unfolded or overlapped gnc squares <5% F B C I M i >5p 0= EDS spectrum conforming to laooratory holes or opaque areas 1 identification criteria observed Chrysotile AMPHIBOLES Amphibole = = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous D = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Manx Actinolite ] Non-Identified j NSD = No Structures Detected

CITY_21MC100_003021220

NYC-WTC_000208241