NYC-WTC_000231431

NYC 9/11 Public Portal Document

[i TEM Asbestos (air) Count Sheet sample area analyzed ff 1 u Client Name: Riverpoint, Inc, Job#; 201103187 Volume filters): 720.0 Lab Sample #: 22 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 201019 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 #: ^^A^>lerating Voltage: 100 KeV .... Analysis Performed by; Mikhail Gruzman Location Grid Length Width I Opening Fiber gM nM Fiber Type Morphology EDS Orient. SAED Photo C1-B4/1 1 NSD D C1-C4/1 2 NSD U C1-E4/1 3 NSD U CLF4/1 4 NSD u C1-G4/1 5 NSD u C1-H4/1 6 NSD u C1-K4/1 7 NSD u C2-F4/6 8 NSD u C2-G4/6 9 NSD u C2-H4/6 10 NSD u

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 <0.0053 ISl Grid Openings Covered > 50% Amphibole Asbestos Structures: 0 <10 <0.0053 13 Intact Grid Opening > 50% ( Undissolved Filter < 10% u Asbestos Structures >=5 microns: 0 <10 <0.0053 13 Folded Replica <50% Total Non-Asbestos Structures: Total Asbestos Structures: 0 <10 <0,0053 13 Filter Loading < 10% J Analytical Sensitivity: 10 0.0053 S Particulate Even

CITY_21MC100_008880397

NYC-WTC_000231581