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 filters ): 1952 Lab Group #: 6126 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: ;o Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0-04496

GRID BOX: Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/18/01

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID cf Structure N or 4 EOS (Nonadb No F B C M ■=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

Struct = > 0.5p >5:l Aspect Ratio Grid acceptance:

\ - Positive diffraction pattern prooerties confoiming to <50% undissolved filter, overtappeO or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

\ = EDS spectrum conforming to laboratory . least 20 unfolded or overlapped grid squares <5% t holes or opaque areas - c M >5p

identification criteria obsen/ed Chrysotile ; AMPHIBOLES ) Amphibole F = single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous Anthophyllite I C = Cluster 03 Intersections) Non-Asbestos M = Matnx Tremolite Actinolite Non-ldentified NSD = No Structures Detected

CITY_21MC100_003104876

NYC-WTC_000184267