TEM Asbestos bulk sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume filters): 1784 Lab Group #: 7376 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 16 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/10/02

Analysis Performed By: MARK. PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M >=05 M ■ >=5kJ Chrys Amphibole Nona'sb Ambig/ND No Coord <5m Elements)

•-------- -3 CT

Struct = > 0.5n > 5:1 Aspect Ratio Grid acceptance: ■J- Positive diffraction pattern properties conforming to <50% undissolved filter, overlappec or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u ■A EDS spectrum conforming lo laboratory holes or opaque areas identilication criteria observed Cluysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-AsbesTos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_009505373 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178876