NYC-WTC_000231431

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet sample area analyzed I L.1 Client Name: Riverpoint, Inc, Job#: 201103187 Volume fliters): 675.0 Lab Sample #: 19 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 201017 Grid Opening Size: 0.01000 Received: 10Z23/2001 07;30;00 Area Examined: 0.10000 mm2 D Date Analyzed: 10/24/2001 Scope #: Magnification: 20,000 Aggslerating Voltage: 100 KeV Analysis Performed by: Mikhail Gruzman Location Grid Length Width opening Fiber gM gM Fiber Type Morphology EDS Orient. SAED Photo A5-B4/6 1 NSD O A5-C4/6 2 NSD u A5-E4/6 3 NSD u A5-F4/6 4 NSD u A5-G4/6 5 NSD u fj A5-H4/6 6 NSD u B1-C4/6 7 NSD u B1-E4/6 8 NSD u B1-F4/6 9 NSD u B1-G4/6 10 NSD u

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J NSD: No Asbestos Structures Detected -J Comments Modified TEM Level 11 reports only asbestos fibers >=5 microns in length Structure Density Concentration n Grid Evaluation Total Grid Openings: 10 (str/mm2) (str/cc air) Chrysotile Asbestos Structures; 0 <10 <0.0057 13 Grid Openings Covered > 50% 13 Intact Grid Opening > 50% Amphibole Asbestos Structures: 0 <10 <0.0057 3 Undissolved Filter < 10% Asbestos Structures >=5 microns: 0 <10 <0.0057 Total Non-Asbestos Structures: 3 Folded Replica < 50% T 0 <10 <0.0057 3 Filter Loading <10% Total Asbestos Structures: i Analytical Sensitivity: 10 0.0057 3 Particulate Even

CITy_21MC100_008880394

NYC-WTC_000231578