NYC-WTC_000225655

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client iName: NYC BOE Volume filters'): 1928 Lab Group 6142 FnteiLTy2e£FilteiLATea2. MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm^ Magnification: GRID BOX: GRIDED: # Grid Openings: 4 w Accelerating Voltage: Analysis Date: 20,000 100 KeV 12/19/01

Analysis Performed By: (IP ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C ■M >=05 p >=5pi Chrys Amphibole Nonasb Ambig/ND No Coord <5|j Elements)

/C- ' K SB a lO

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance; >/= Positive diffraction pattern properties conforming to "50% undissolved filter, overlapped or folded Totals ___criteria laboratory identification ____observed ____ k <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p I •/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002921704

NYC-WTC_000225655