NYC-WTC_000231431

NYC 9/11 Public Portal Document

u1 TEM Asbestos (air) Count Sheet sample area analyzed H Client Name: Riverpoint, Inc. Job.#: 201103187 Volume filters): 652,5 Lab Sample #: 23 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 021020 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 #: Acc^rating Voltage: 100 KeV Analysis Performed by: xVfkhail Gruzman

Location Grid Fiber Length Width Opening gM gM Fiber Type Morphology EDS Orient. SAED Photo C3-B4/1 1 NSD □ C3-C4/1 2 NSD u C3-E4/1 3 NSD u C3-F4/1 4 NSD u u u C3-G4/1 C3^H4/1 C3-K4/1 5 6 7 NSD NSD NSD u u C4-E4/1 8 NSD u C4-F4/1 9 NSD u C4-G4/1 10 NSD u

NSD; No Asbestos Structures Detected Comments Modified TEM Level IT report.? only asbestos fibers >=5 microns in length Structure Density Concentration Total Grid Openings: (str/mm2) (str/cc air) Grid Evaluation 10 Chrysotile Asbestos Structures: 0 <10 <0.0059 13 Grid Openings Covered > 50% 13 Intact Grid Opening > 50% Amphibole Asbestos Structures: 0 <10 <0.0059 3 Undissolved Filter < 10% Asbestos Structures >=5 microns; 0 <10 <0.0059 Total Non-Asbestos Structures: 3 Folded Replica < 50%

nI Total Asbestos Structures: Analytical Sensitivity: 0 <10 10 <0.0059 0,0059 3 Filter Loading < 10% 3 Particulate Even

CITY_21MC100_008880398

NYC-WTC_000231582