NYC-WTC_000231431

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet sample area analyzed

Client Name: Riverpoint, Inc. Job#: 201103187 Volume (liters): 675,0 Lab Sample #: 17 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 061017 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 #: A^'cLruting Voltage: 100 KeV Analysis Performed by: Mihail Gruzman

Location Grid Length Width Opening Fiber ;iivi gM Fiber Type Morphology EDS Orient, SAED Photo A1-B4/6 1 NSD □ "I A1-C4/6 2 NSD u A1-E4/6 3 NSD u A1-F4/6 4 NSD u A1-G4/6 5 NSD u A1-H4/6 6 NSD u A1-K4/6 7 NSD u A2-E4/6 8 NSD u A2-F4/6 9 NSD u A2-G4/6 10 NSD u

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

CITY_21MC100_008880392

NYC-WTC_000231576