TEM asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume /liters): 1944 Lab Group #: 7185 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/23/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Nor n EDS (Nonadb No F B C >=05 u I Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

T Cl ___ 4 —

Struct = >0.5p > 5:1 Aspect Ratio Grid acceptance: 7= 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 >5tJ 7= EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chiysotile AMPHIBOLES Amphibole F = Single Fiber Amosite i B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ! Ambiguous C = Cluster (>3 Intersections) Anttiophyllite ' Non-Asbestos T remolite ' M = Matrix Non-Identified Actinolite NSD = No Siructures Delected

CONFIDENTIAL, CITY_21MC100_003467025 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180459