NYC-WTC_000231431

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet sample area analyzed

Client Name: Riverpoint, Inc. Job#: 201103187 Volume Piters): 507.5 Lab Sample #: 06 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 200910 Grid Opening Size: 0.01000 Received: 10/23/2001 07:30:00 Area Examined: 0.10000 mm2 Date Analyzed: 10/24/2001 Magnification: 20,000 Scope #: Accelerating Voltage: 100 KeV Analysis Performed by: Mikhail Gruzman Location Grid Length Width Opening Fiber pM jiiM Fiber Type Morphology EDS Orient. SAED Photo A9-B4/6 1 2 NSD □u A9-C4/6 NSD A9-E4/6 3 NSD u A9-F4/6 4 NSD u A9-G4/6 5 NSD u A9-H4/6 6 NSD u A9-K4/6 7 NSD u A10-F4/6 8 NSD u A10^G4/6 9 NSD u A10-H4/6 10 NSD u

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I NSD: No Asbestos Structures Detected -! Comments Modified TEM Level 11 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 <0.0076 13 Grid Openings Covered > 50% <10 <0,0076 13 Intact Grid Opening >50% Amphibole Asbestos Structures: 0 <0.0076 3 Undissolved Filter <10% Asbestos Structures >=5 microns: 0 <10 Total Non-Asbestos Structures: 3 Folded Replica < 50% Total Asbestos Structures: 0 <10 <0.0076 3 Filter Loading < 10% ! Lj Analytical Sensitivity: 10 0.0076 3 Particulate Even

CITY_21MC100_008880381

NYC-WTC_000231565