NYC-WTC_000231431

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet sample area analyzed 0- Client Name: Riverpoint, Inc. Job^ 201103187 Volume iliters): 675.0 Lab Sample #: 01 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 201006 Grid Opening Size: 0.01000 Received: 10/23/2001 07:30:00 Area Examined: 0.10000 mm2 Date Analyzed: 10/23/2001 Magnification: 20,000 Scope #: Accelerating Voltage: 100 KeV 11 i Analysis Performed by: 'jjq > Aleksandr Barengolts 1 Location Grid Opening Fiber Length gM Width /tM Fiber Type Morphology EDS Orient. SAED Photo D4.4/6B 1 NSD o D4-4/6C 2 NSD u D4-4/6E 3 NSD u D4-4/6F 4 NSD u D4-4/6G 5 NSD u D4-4/6H 6 NSD u D4-4/6K 7 NSD u D5-5/4F 8 NSD u D5-5/4G 9 NSD u D5-5/4H 10 NSD u

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j NSD: No Asbestos Structures Detected -J 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 13 Grid Openings Covered > 50% <10 <0.0057 [3 Intact Grid Opening > 50% Amphibole Asbestos Structures: 0 <10 <0.0057 3 Undissolved Filter < 10% Asbestos Structures >=5 microns: 0 Total Non-Asbestos Structures: 13 Folded Replica < 50% Total Asbestos Structures; 0 <10 <0.0057 13 Filter Loading < 10% Analytical Sensitivity: 10 0.0057 3 Particulate Even

CITY_21MC100_008880376

NYC-WTC_000231560