NYC-WTC_000223681

NYC 9/11 Public Portal Document

TEM Asbestos(airlCountSh^ Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7390 Filter Tvpe / Filter Area: MCE 3s5 mm* Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 02 Area Examined: 0 04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: AcceleratingVoltaee: 100 KcY # Grid Openings: 4 Analysis Date: 4 13 02

Analysis Performed By: MARK PEYSAKHOV

GO. structure Structure Type Length ID of Structure N or v 1 EDS No F B C M ToTp :>-5h Chrys Amphibole Nonasb 1 AmbigiND ' ’■"''''''3'-'- No Coord <5m I I tiemenis;

Struct = > 0.5|u >5:1 Aspect Ratio Grid acceptance: v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfoWed or overlapped grid squares <5% ' i F i B ' C I M 7= EDS spectrum conforming to laboratory holes or opaque areas |. Identification criteria observed Chrysotile 1 -------------------------- 1- AMPHIBOLES .'\mphibole 1 F = Single Fiber Amosite 0 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous : C = Cluster (>3 Intersections) Anthophyllite Non-AsbestoT’ Tremolite M = Matnx Actinolite I Non-identified ! NSC = No Structures Detected

CITY_21MC100_002919744

NYC-WTC_000223681