TEM asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6060 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/7/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EOS {Nonadb No F B C ' M >=05 p j ■=5)j Ghrys Amptiibole Nonasb Ambig/ND

s No Coord <5|j Elements)

1/

J__ i

Struc: = > 0.5p _> 5:1 Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification ettena 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 i B c M >5(j

identification criteria observed Chrysotile —t- AMPHIBOLES । Amphibole F = Single Fiber Amosite 3 = 3undle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix NSD = Mo Structures Detected Actinolite Non-Identified 1 CITY_21MC100^003104557

NYC-WTC_000184048