NYC-WTC_000230074

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 7192 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: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/24/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No INonadb F B C M >=05 u - ■>=5|j Chrys Amphibole Nonasb Ambig/ND Elements) No Coord <5p

S'-

Struct = > 0.5g >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolvefl filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

>/= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B C M >5u holes or opaque areas identification criteria observed Chiysotile AMPHIBOLES i 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 Detected

CONFIDENTIAL, CITY_21MC100_003388701 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230074