TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Gronp #: 6142 Filter Type / Filter Area: MCE 385 Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0,04496 mm"

GRID BOX: Magnification: 20,000 GRID ID: a V) Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/19/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure n or V EDS No aSwnd ! F B C M •=5iJ Chrys Amphibole Nonasb

a No Coord <5p I Elements)

7542 '/ [(

/£) —

Struct = > 0.5p > 5; 1 Aspect Ratio Grid acceptance: /= Positive diffraction pattern properties conforming to <50% undissolved tilter, overlapped or folded T otals laboratory identification critena observefl <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p ; V- EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chrysotile i amphiboles"} Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apah Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-ldentified NSD = No Structures Detected

CITY_21MC100_003104907

NYC-WTC_000184291