NYC-WTC_000231431

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet sample area analyzed ff .I J Client Name: Riverpoint, Inc. I Joh j^ 201103187 Volume filters): 675.0 u Lab Sample #: 24 Filter Type/Filter Area: MCE 385 mm2 Client Sample #: 061020 Grid Opening Size: 0.01000 Received: 10/23/2001 07:30:00 Area Examined: 0.10000 mm2 D Date Analyzed: 10/24/2001 Magnification: 20,000 ______ Scope #:________________________A^^lerating Voltage: 100 KeV AnaiysisPerfotmeTbyr^^ Mikhail Gruzman Location Grid Fiber Length Width Opening /xM Fiber Type Morphology EDS Orient, SAED Photo C5-B4/1 1 NSD tj C5-C4/1 2 NSD U C5-E4/1 3 NSD U C5-F4/1 4 NSD U C5-G4/1 5 NSD U C5-H4/i 6 NSD u C5-K4/1 7 NSD u D1-F4/1 8 NSD u DbG4/l 9 NSD u D1-H4/1 10 NSD LJ

0

u NSD; No Asbestos Structures Detected Comments Modified TEM Level 11 reports only asbestos fibers >=5 microns in length Structure Density Concentration nJ Total Grid Openings: 10 (str/mm2) (str/cc air) Grid Evaluation Chrysotile Asbestos Structures: 0 <10 <0.0057 Grid Openings Covered > 50% 121 Intact Grid Opening > 50% Amphibole Asbestos Structures: 0 <10 <0.0057 121 Undissolved Filter < 10% Asbestos Structures >=5 microns: 0 <10 <0.0057 Total Non-Asbestos Structures: Folded Replica < 50% Total Asbestos Structures: 0 <10 <0.0057 121 Filter Loading < 10% Analytical Sensitivity: 10 0.0057 121 Particulate Even

CITY_21MC100_008880399

NYC-WTC_000231583