NYC-WTC_000226643

NYC 9/11 Public Portal Document TEM Asbestos (air) Count Sheet NSD = No Structures Detected NYC-WTC_000226650 Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6718 Filter Type / Filter Area: MCE 385 mm? Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0.04496 mm? GRID BOX: ESE Magnification: 29 009 GRID ID: S$ Gt 3 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/18/02 Analysis Performed By: LE a a : MARK PEYSAKHOV GO. Structure Structure Type Length ID of Structure Nor V EDS | No >=08 3 Amphibole | Nonasb | AmbiginD | _'Nonadb No Coord FYB Yo M Sp 5H Chrys emmee ones ms Elements) (ABA _| —_ Re Sk <a eee ISB 6 Le >p| _l: | | a Struct = > 0.5 > 5:1 Aspect Ratio Grid acceptance: = 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 unfolded or overlapped grid squares <5% F B C M | >5u V= EDS spectrum conforming to laboratory holes or opaque areas 7 identification criteria observed Chrysotile AMPHIBOLES : F = Single Fiber Amosite Amphibole B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos . . Tremolite - M= Matrix Actinolite Non-Identified CITY_21MC100_002922835