NYC-WTC_000202373

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volumc (liters): 1920 Lab Group #: 8828 Filter Type / Filter Area: MCE 385 rrtm- Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/10/02

Analysis Performed By: MARK PEYSAKHOV

Structure Structure Type Length ID of Structure N or V EDS GO, (Nonadb No F B C >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elenienlsj

- ----- 23 / c:.

Struct ==> 0.5g > 5:1 Aspect Ratio Grid acceptance;

y= 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 >5h v= EDS spectrum con'orming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite ,S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C.= Cluster t>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CITY_21MC100_003272383

NYC-WTC_000202373