NYC-WTC_000231431

NYC 9/11 Public Portal Document

■ 1 I -J TEM Asbestos (air) Count Sheet sample area analyzed H Client Name: Riverpoint, Inc. Job#: 201103187 Volume (liters): 675.0 1 Lab Sample #: 28 u Client Sample #: 191022 Filter Type / Filter Area: MCE Grid Opening Size: 0.01000 385 mm2

Received: 10/23/2001 07:30:00 Area Examined: 0.10000 mm2 Date Analyzed: 10/24/2001 Magnification: 20,000 Scope #: >^^Ac(^lcrating Voltage: 100 KeV Analysis Performed by: vTikhail Gruzman Grid Length Width Location Opening Fiber Fiber Type Morphology EDS Orient. SAED Photo ;tM ;tM E3-B4/6 1 NSD □ E3-C4/6 2 NSD u D E3-E4/6 E3-F4/6 3 4 NSD NSD u u E3-G4/6 5 NSD u E3-H4/6 6 NSD u E3-K4/6 7 NSD u E4-F4/6 8 NSD u E4-G4/6 9 NSD u E4-H4/6 10 NSD u

NSD: No Asbestos Structures Detected Comments Modified TEM Level II reports only asbestos fibers >=5 microns in length Structure Density Concentration (str/mm2) (str/cc air) Grid Evaluation Total Grid Openings: 10 Chrysotile Asbestos Structures: 0 <10 <0.0057 IHl Grid Openings Covered > 50% Amphibole Asbestos Structures: 0 <10 <0.0057 13 Intact Grid Opening > 50% <10 <0.0057 13 Undissolved Filter < 10% Asbestos Structures >=5 microns: 0 Total Non-Asbestos Structures: 13 Folded Replica < 50% Total Asbestos Structures: 0 <10 <0.0057 3 Filter Loading < 10% Analytical Sensitivity: 10 0.0057 3 Particulate Even

CITY_21MC100_008880403

NYC-WTC_000231587