NYC-WTC_000231431

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet sample area analyzed

Client Name: Riverpoint, Tnc. Job#: 201103187 Volume (liters): 732.0 Lab Sample #: 07 Filter Type / Filter Area: MCE 385 mm2 J Client Sample #: 051011 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 #: Accelerating Voltage: 100 KeV

Mikhail Gruzman Location Grid Fiber Length Width Opening //M MM Fiber Type Morphology EDS Orient. SAED Photo B6-B5/1 1 NSD u B6-C5/1 2 NSD u B6-E5/1 3 NSD u B6-F5/1 4 NSD u B6-G5/1 5 NSD u B6-K5/1 6 NSD u B7-F5/1 7 NSD u B7-G5/1 8 NSD u B7-H5/1 9 NSD u ... B7-K5/1 10 NSD u

NSD: No Asbestos Structures Detected Comments Modified TEM Level II reports only asbestos fibers >=5 microns in length Structure Density Concentration 1 Grid Evaluation u Total Grid Openings: Chrysotile Asbestos Structures: 10 0 (str/mm2) <10 (str/cc air) <0.0053 IB! Grid Openings Covered > 50% 13 Intact Grid Opening > 50% Amphibole Asbestos Structures: 0 <10 <0,0053 3 Undissolved Filter < 10% Asbestos Structures >=5 microns: 0 <10 <0.0053 3 Folded Replica < 50% Total Non-Asbestos Structures: <10 <0.0053 13 Filter Loading < 10% Total Asbestos Structures: 0 0.0053 3 Particulate Even Analytical Sensitivity: 10

CITY_21MC100_008880382

NYC-WTC_000231566