NYC-WTC_000231431

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet sample area

■■ ] analyzed ff Client Name: Riverpoint, Inc. Job#: 201103187 Volume (liters): 675.0 Lab Sample #: 08 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 011012 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 #: 100 KeV Analysis Performed by: Mikhail Gruzman Grid Length Width Location Opening Fiber gM gM Fiber Type Morphology EDS Orient. SAED Photo B8-B5/i 1 NSD n B8-C5/1 2 NSD U J B8-E5/1 3 NSD U B8-F5/1 4 NSD U B8-G5/1 5 NSD u B8-H5/1 6 NSD u B9-C5/1 7 NSD u B9-E5/1 8 NSD u B9-F5/1 9 NSD u B9-G5/1 10 NSD u

5

u 11 n

NSD; No Asbestos Structures Detected Comments Modified TEM Level IT reports only asbestos fibers >=5 microns in length ’’1 Structure Density Concentration (str/mm2) (str/cc air) Grid Evaluation LJ i Total Grid Openings: 10 Chrysotile Asbestos Structures: 0 <10 <0.0057 S Grid Openings Covered > 50% Amphibole Asbestos Structures: 0 <10 <0.0057 Intact Grid Opening > 50% <10 <0.0057 IZl Undissolved Filter < 10% Asbestos Structures >=5 microns: 0 Total Non-Asbestos Structures: Folded Replica < 50% Total Asbestos Structures: 0 <10 <0.0057 Filter Loading < 10% Analytical Sensitivity; 10 0,0057 13 Particulate Even

CITY_21MC100_008880383

NYC-WTC_000231567