TEM Asbestos Air Sample Results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters'): 1840 Lab Group #: 8229 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm^

GRID BOX: Masnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/23/02

Analysis Performed By: ______ t V'________ 7^ ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C M >=05 p :>=51J Chrys Amphibole Nonasb Ambig/ND Elements)

10 zzo; No Coord <5|j

"9 Z

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: >/= Posirive rtfiract on pattern properties conforming to <50% undtesolved 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 >5p 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed 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_003461745 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179877