TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 6051 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 8 Area Examined: 0.04496 mm" GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 12/6/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor N EDS No F B C M >=05 U I >=5p Chrys Amphiboie Nonasb ASbig/ND No Coord <5u ! Elements)

J

Struct = > 0,5u > 5; I Aspect Ratio Grid acceptance: 9= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% B C i M >5p EDS spectrum conforming to laboratoiy holes or opaque areas _______ p loentification cntena observed Chrysetile amphiboles"^ .Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart : Crocidolite Ambiguous C = Cluster (>3 Intersections) j Anthophyllite Non-Asbestos : Tremolite M = Matnx NSC = No Structures Detected i Actinolite Non-Identified I i J. CITY_21MC100_003104529

NYC-WTC_000184025