NYC-WTC_000223877

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7771 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/17/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or '/ EDS i (Nonadb i No F 8 C M >=5p Chrys Amphibole Nonasb Airbig/ND No Coord <6p Elements) !

cr-J ^<3

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: d = PositivB diffraction pattern properties conforming to <50% undissQlved filter, overtapped or folded Totals laboratory identification criteria observed <10% particulate coverage >60% coverage ate least 20 unfolded or overlapped grid squares <5% F B I C i M >5m EDS spectrum conforming to laboratoiy holes or opaque areas identification critena observed Chrysottle ---------- !------------ ---------- j------------ AMPHIBOLES Amphibole F - Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos T remolite M = Matrix Actinolite i Non-ldentified NSD = No Structures Detected

CITY_21MC100_002920080

NYC-WTC_000223877