NYC-WTC_000211905

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 7302 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 18 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/2/02

Analysis Performed By: MARK PEYSAKHOV

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

i g-i 6^.? —X— ------- ---------------------------- --- O’

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

CITY_21MC100_000461605 NYC-WTC_000211905