NYC-WTC_000228983

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume (liters): 2178 Lab Group #: 7797 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20.000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/19/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or V EDS I INonadb i No Coord No F B cw »05y >=5p Chrys Ampfiitxjie Nonasb Ambi^iND’ Elements) ] ----------- 1 '' -------------- i ----- <1.

I -1

_____ J__i„__ Struct ==>0.5p >5:1 Aspect R.atio Grid acceptance 4= Positive diffraction pattern properties conforming to <50% uridissQlved filler, overlapped or folded Totals latMraioty identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M ’5u EDS spiBetrum conforming to laboratory holes or opaque areas identiftcation criteria observed Chrysotile amphiboles Amphibole F = Single Fiber Amosite B = Bundle j<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C =■ Cluster i>3 Intersections) Anthophyllite Noti-Asbestos Tremolite M = Matrix Actinolite Non-identified NSO = Na Structures Detected

CITY_21MC100_002902000

NYC-WTC_000228983