NYC-WTC_000229996

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7136 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 21 Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: A" <3 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/19/02

Analysis Performed By: MARKPEYSAKHOV

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

S3 J?

Struct = > 0.5n _> 5:1 Aspect Ratio Grid acceptance: 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 >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES 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_21MC1OO_OO3388585

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229996