TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE T^olnme (liters): 1936 Lab Group #: 6028 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 3 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Areeleratina \ nltaop- 100 KeV # Grid Openings: 4 Analysis Date: 12/4/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or y EDS No (Nonadb F B C >=05 M >=5(j Ch^s Amphibole Nonasb Ambig/ND No Coord <5u Elements)

jr u

Struct = > 0.5p > 5:1 Aspect Ratio 3rid acceptance:

Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals laborator)' identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% f E C M >5u EDS spectrum conforming to laboratory holes O' opaque areas —I__ identification criteria observed Chrysotile i AMPHIBOLES Amphibole F = S'ogle Fiber i Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos ' Tremolite M = Math): Actinolite Non-Identified NSD = No Structures Delected ______ f„

CITY_21MC100_003104466

NYC-WTC_000183983