TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: m'C BOE Volume (liters): 1944 ■ Lab Group #: 6191 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample it: 10 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: 3 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/24/01

Analysis Performed By: iCP ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN F EDS (Nonadb No F 8 C M >=05 M Chrys Amphibole j Nonasb i Ambig/ND i No Coord <5p Elements)

T

I a

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: v= Positive diffraction pattern properties confoming to <50% undissoh/ed filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F FfB C M \= EDS spectrum conforming to laboratory holes or opaque areas idertificalion criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite E = Bundle <3 fibers <1 fiber oiameler apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSC = No Structures Detected

CITY_21MC100_003105050

NYC-WTC_000184393