NYC-WTC_000227931

NYC 9/11 Public Portal Document

TEIVTAsbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1S40 Lab Group #: 6792 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size; 0.01124

Client Sample #: 7 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 Accelerating^Voltage: TOO KeV # Grid Openings: 4 Analysis Date: 2/23/02

Analysis Performed By: MARK PEYSAKHOV

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

XzO'

g >zx'

4

Struct •= > 0.5n >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undlssolved filter, cveriapped or folded Totals <10% partioulats coverage >50% coverage ate leboratory identification criteria observed least 20 unfolded or overiapped grid squares <5% F B C M >5y EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES i Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M » Matrix Actinolite Non-Identificd NSD = No Structures Detected

CITY_21MC100_002899476

NYC-WTC_000227931