NYC-WTC_000229102

NYC 9/11 Public Portal Document

lTMA^estos(airXCoiintSheet Client Name: NYC BOE Volume (liters): 1872 Lab Group #; 7885 Filter Type / Filter Area: MCE 385 mm- Lab Sample 17 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/27/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V CDS (Nonadb No F B C M >=05 p Cfirys Amptlibofe fjwiasb Amtiig/NO No Coord <5p Elements) j

a:

Struct = > 0 5m >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties confoming to <50% uwSssolved flits', overlapped or folded Totals <10% particulate coverage >50% coverage ate SiboratDiy Identifeation criteria observed least 20 unfolded or overlapped grid squares <5% F 0 C i M >5)j v/s EDS spectrum oottformirig to laboratory holes or opaque areas identification critsria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle | <3 fibers <1 fiber diameter apart Crocidolite Ambiguous i 1------- h C = Cluster ;>3 ntersec-jons) Anthoptiyllite Non-Asbestos Tremolite J i M = Matrix Actinolite Non-Identified ! I ! N3D = Mo Structures Detected

CITY_21MC100_002902202

NYC-WTC_000229102