NYC-WTC_000231431

NYC 9/11 Public Portal Document n

TEM Asbestos (air) Count Sheet sample area analyzed

D Client Name: Riverpoint, Inc. Job#; 201103187 Volume flitersl: 675.0 Lab Sample #: 27 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 011021 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 #: y^Acce^ating Voltage: 100 KeV Analysis Performed by: MOail Gruzman Location Grid Fiber Length Width Opening gM Fiber Type Morphology EDS Orient. SAED Photo E1-B4/1 1 NSD U E1-C4/1 2 NSD U E1-E4/1 3 NSD U E1-F4/1 4 NSD U E1-G4/1 5 NSD u E1-H4/1 6 NSD u E1-K4/1 7 NSD u E2-F4/1 8 NSD u E2-G4/1 9 NSD u E2-H4/1 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

0 Total Grid Openings: Chrysotile Asbestos Structures: 10 0 (str/mm2) <10 (str/cc air) <0,0057 Grid Evaluation 13 Grid Openings Covered > 50% 13 Intact Grid Opening > 50% n Amphibole Asbestos Structures: Asbestos Structures >=5 microns: 0 0 <10 <10 <0.0057 <0.0057 13 Undissolved Filter < 10% Folded Replica < 50% Total Non-Asbestos Structures: Total Asbestos Structures: 0 <10 <0.0057 13 Filter Loading < 10% Analytical Sensitivity: 10 0.0057 13 Particulate Even

CITY_21MC100_008880402

NYC-WTC_000231586