NYC-WTC_000201275

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7334 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIPED: Accelerating Voltage: .100 KeV Grid Openings: 4 Analysis Date: 4/5/02

Analysis Perfornied By: MARK PEYSAKHOV

GO. Structure Structure Type [ Length ID of Structure N or 4 EDS (Nonsdb No F B C M >=05 p :>=5pj Chrys Amphibole Nonasb Ambig.'ND^ i No Coord ‘ Elements)

i ’ GN"

Struct => 0.5)0 >5:1 Aspect Ratio Grid acceptarcs: 4= Pcsitive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identif cation .criteria obseived <13% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% FTB C M >5u 4= EDS spectrum conforming to-laboratory holes or opaque areas . identification criteria oaseoied Chrysotile I 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

CITY_21MC100_011275566

NYC-WTC_000201287