NYC-WTC_000228789

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Ctient Name: NYC BOE Volume niters); 1816 Lab Group #: 7656 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/6/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure Norv EDS No (Noradb F B C M >=05 p >=^ Chrys Amphibole Nonasb AmtMgTNO , No Coord <5m Etementsl

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Struct = >6.5|u >5:1 Aspect Ratio Grid acceptance: ’/= Positive diffraction pattern properties conforming to <50% undissotved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate taboietory identificaSon criteria observed least 20 unfolded or oveilapped grid squares <5% F B C M >5p v'= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 f bers <1 fiber diameter apart Crociclolite Ambiguous C = Cluster (>3 intersections} Anthophyllite Non-Asbestos Tremolite M = MaSix Actinolite Non-Identified NSO = No Structures Detected

CITY_21MC1OO_OO29O1691

NYC-WTC_000228789