NYC-WTC_000190946

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client iName: NYC BOE Volume (liters): 1920 Lab Group #: 7611 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm^ GRID BOX: Magnification:20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/2/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of structure Norv EDS No (Nonadb F B C M >=05 |j >=5p Chrys Amphitx>le Nonasb Ambig/ND Elements) No Coord <5m

J

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: V = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory Identification critena observed <10% particulate coverage >50% coverage ate

EDS spectrum, conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5p

identification criteria 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 Tremolite M = Matnx Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003090035

NYC-WTC_000190946