TEM Asbestos air sample data sheet, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 7283 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 9 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRID ID: Accelerating \ oltage: too KeV # Grid Openings: 4 Analysi.s Date: 3/31/02

Analysis Performed Bv: ■I I i T »

MARK PEYSAKHOV

; GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C M >=05 p >=5m Chrys Amphibole Nonasb Ambig/ND No! Coord <5m Elements)

2^ c—

StTuct = > O.5u > 5:1 Aspect Ratio Grid acceptance; N= Positive diffraction pattern properties conforming to <50% undissclved filter, overlapped 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 >5|j EDS spectrum conforming to laboratory holes or opaque areas identHkation criteria observed Chrysotile AMPHIBOLES । Amphibole F = Single Fiber Amosite i B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos Tremolite ) M = Matrix Non-Identified Actinolite I NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467250 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180624