NYC-WTC_000228820

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7672 Filter Type / Filter Area: MCE 385 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 Pate: 5/8/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. ] Structure Structure Type Length ID of Structure N or \ EDS i 1 No (Monadb j F ■ 8 C >=05 M >=51J Ctirys Ampriboe Nonasb Ambrg/ND No Coord <5m Elements) >

^1 / 7 V 1

4

Struct = ■> 0.5p >5.-1 Aspect Ratio Grit) acceptance Positive diffraction pailem properfies ocnfuiming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particuSate Coverage >50% coverage afe feast 20 unfolded or overlapped grid squares <5% F B C M >5p EOS spectrum conforming to laboratory doles or opaque areas idenflfrcatiQn criterra observed Chrysotile amphiboles Amphibole F = Single Fiber Amosite Crocidolite Ambiguous B - Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSO ’ No Structures Ostected

CITY_21MC100_002901739

NYC-WTC_000228820