TEM Asbestos air sample results, NYC SCA, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYCSCA Volume (liters): 1936 Lab Group #: 5801 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 17 Grid Opening Size: 0.01124 Client Sample #: 17 - Area Examined: 0.04496 mm^ GRID BOX: 5^ Sr Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphitxjle Nonasb Amtug/ND Coord <5p Elements)

N Zl

I

1

I Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification critetia obsen/ed <10% particulate coverage >50% coverage ate • least 20 unfolded or overiapped grid squares <5% F B C M >5|j EDS spectrum conforming tc laboratory holes or opaque areas identification criteria observed Chrysotile I 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 Actinolite Non-Identified NSD = No Structures Defected

CITY_21MC100_003106043

NYC-WTC_000185102