NYC-WTC_000231431

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet sample area analyzed e Client Name: Riverpoint, Inc. Job#: 201103187 Volume (liters): 675.0 Lab Sample #: 25 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 051020 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 #: ■ Ac^lerating Voltage: 100 KeV Analysis Performed by: Mikhail Gruzman Grid Length Width Location Opening Fiber p.M /iM Fiber Type Morphology EDS Orient. SAED Photo D2-G4/4 1 NSD □ D2-H4/4 2 NSD u D2-K4/4 3 NSD u D3-E2/4 4 NSD u 1 D3Y2/4 5 NSD u u D3-G2/4 6 NSD u D3-H2/4 7 NSD u D3-H3/i 8 NSD u D3-K3/1 9 NSD u D3-L3/1 10 NSD u

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u j NSD; No Asbestos Structures Detected Comments Modified TEM Level II reports only asbestos fibers >=5 microns in length Structure Density Concentration Total Grid Openings; 10 (str/inm2) (str/cc air) Grid Evaluation Chrysotile Asbestos Structures: 0 <10 <0.0057 121 Grid Openings Covered > 50% Amphibole Asbestos Structures: 0 <10 <0.0057 121 Intact Grid Opening >50% Asbestos Structures >=5 microns: 0 <10 <0.0057 12 Undissolved Filter < 10% Total Non-Asbestos Structures; 12 Folded Replica < 50% Total Asbestos Structures: 0 <10 <0.0057 12 Filter Loading < 10% Analytical Sensitivity: 10 0.0057 !2 Particulate Even

CITY_21MC100_008880400

NYC-WTC_000231584