NYC-WTC_000201111

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters'): 1920 Lab Group #: 7878 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496'

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/26/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of structure Nor V EDS No (Nonadb, F B C M >=05 p ■ >=5)j Ctirys Amphibole Nonasb Ambig/ND Elements) No 7 Coord <5u

M'” Struct = > 0.5p > 5:1 Aspect Ratio uM7. Grid acceptance: . •. i ‘ C, Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals 'laboratoryidentification crteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M r EDSspectrum conforming to laboratory holes or opaque areas ; 7 identification criteria observed 7 . Chrysotile ! AMPHIBOLES M Amphibole 7 7 F = Single Fiber ) Amosite ; . 8 = Bundle (<3 fibers <1 fiber diameter apart 7 i Crocidolite Arnbiguous . C = Cluster (>3 Intersections) , Arthopfiyllite Non-Asbestos Tremolite 71 M.= Matrix Non-Identified Actinolite ), NSD = No Structures Detected ■

CITY_21MC100_011275401

NYC-WTC_000201112