NYC-WTC_000212576

NYC 9/11 Public Portal Document

l EM Asbestos (air) Count sheet Client Name: NYC BOE Volume (liters): 1896 Lab Group #: 7786 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 (jRID ID: Accelerating Voltage: 100 KeV /■ Grid Openings: 4 Analysis Date: 5/18/02

Analysis Performed By: Ay ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M =5m Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

ft

/W 4

Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: »= Positive diffraction pattern properties confonninci to <50% undissoh/ed filter, overlapped or folded Totals laboratory identification critena observed <10% partculate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5u s : EDS spectrum conformine to laboratory holes or opaque areas Identification enteria observed Chrysotile AMPHIBOLES Amphibole I- i Single Fiber Amosite I: - Bundle !<3 fibers <1 fiber liameter apart Crocidolite Ambiguous 2 - Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite \1 - Matrix Non-Identified •USD = No Structures Detectec Actinolite S !

CITY_21MC100_002867234

NYC-WTC_0002 12576