NYC-WTC_000212457

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet C lient Name: bTYC BOE Volume (liters): 1920 Lab Ciroup #: 7433 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124

C lient Sample #: 12 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/16/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND Mo Coord <5p Elements)

Struct = > 0.5n > 5:1 Aspect Ratio Grid acceptance: V = Posifive diffraction pattern proferties conforming to *5°* undissolved filter, overtop^ or folded Totals laborator/ identification criteria observed I k. •*! « <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES^ Amphibole F - Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite IV = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002866596

NYC-WTC_000212457