NYC-WTC_000230178

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1960 Lab Group #: 6491 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 20 Grid Opening Size: 0.01124

Client Sample #: 20 Area Examined: 0.04496 mm^

GRID BOX: Magnification: ■20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/28/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure-Type Length ID of Structure NorN EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

J de­

struct = > 0.5n _> 5:1 Aspect Ratio Grid acceptance: a/= Positive diffraction pattern properties conforming to *^50% undissoived filter, overlapped or folded Totals laboratory identiScaton criteria obsenred <10% particulate coverage >50% coverage ate ■/= EDS spectrum conforming to laboratory least 20 unfolded or overiapped grid squares <5% holes or opaque areas F B c M >5m identification criteria obsenred Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388878 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230178