NYC-WTC_000189833

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1818 Lab Group #: 6585 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0 01124

Client Sample #: 18 Area Examined: 0 04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/7/02

Analysis Performed By: ROMAN PEYSAKHOV

GO I structure Structure Type Length ID of Structure NorT EDS (Nonadb No F B C M >=05 p >=5)j Chrys Amphibole Nonasb Ambig/NO ZY No Coord <5p Elements)

30

Struct = > 0 5p > 5 1 Aspect Ratio Grid acceptance ■/ = Positive diffraction pattern prooerties conforming to ondissolved filter, overlapped or folded Totals laboratory identification ontena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas Identification cntena observed Chrysotile I AMPHIBOL^ 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 Actinolite Non-Identified NSD = No Structures Detected

CITy_21MC100_003088225

NYC-WTC_000189833