NYC-WTC_000228957

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): IS48 Lab Group #: 7778 Filter Type / Filter 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: too KeV # Grid Openings: 4 Analysis Date: 5/18/02

Analysis Performed By: MARK FEYSAKHOV

GO? Structure Structure Type Length ID of structure N or y EDS No (Nonadt) I F B C M >=05 p >=5p Chrys Amphibole Nofsasb Ambig/NO No Coord Elements}

g -—<- Z <5; r ----- <r ---- <—

' I . r I Struct = > 0.5p > 5: t Aspect Ratio Grid acceptance: 'J= Positive diifraction pattern properties conforming to <5054 undissolved filter, overlapped or folded Totals laboratory identifieaSon criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p EDS spectrum conforming to iatwratory twles or opaque areas identification entena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B - Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I I Tremolite T M » Matrix Actinolite Non-ldentified NSO = No Structures Detected

CITY_21MC1OO_OO29O1962

NYC-WTC_000228957