NYC-WTC_000223836

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7687 Filter Type / 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 GRIP ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/9/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS No (Nonadb F 8 C M >=05 u :>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p ' Elements) .

Struct = > 0.5p >5;! 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% EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile A.MPHIBOLES 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 Actinolite Non-Identified i NSD = No Structures Detected

CITY_21MC100_002920010

NYC-WTC_000223836