TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volnme (liters): 1840 Lab Group #: 7203 Filter Type / Filter Area: MCE 385 mm^ Lab Sample#: 1 Grid Opening Size: 0.01124 Client Sample #: 01 Area Examined: 0.04496 mm-

GRID BOX: 37/ Magnification: 20,000 GRID ID: # Grid Openings: 4 c Accelerating Voltage: Analysis Date: 100 KeV 3/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure bl or V EDS No (Nonadb F B C M >=05 u :>=5p Chrys Amphibole Nonasb Ambig/ND No . Coord <5m Elements)

^7? y /J 2 . y yg- 7/ 60 -=

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance; a/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m ■/- EDS spectrum conforming to laboratory holes or opaque areas identifrcation criteria observed Chrysotile - AMPHIBOLESl Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite ; Non-Asbestos T remolite i M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470559 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176587