TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 7557 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124

Client Sample #: 06 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/28/02

Analysis Performed By: P.

ROMAN PEYSAKHOV

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

Struct = > 0.5g > 5;1 Aspect Ratio Grid acceptance: n'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obsenred <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m /= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ; Tremolite __________________ I M = Matnx Non-Identified ) Actinolite ______________ J NSO = No Structures Detected

CITY_21MC100_003102109

NYC-WTC_000183098