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): 652.5 Lab Sample #: 04 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: 011009 Grid Opening Size: 0.01000 .. 1 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 Analysis Performed by: 7^ Mikhail Gruzman Grid Length Width Location Opening Fiber fiM Fiber Type Morphology EDS Orient. SAED Photo

E5-B4/6 E5-C4/6 1 2 NSD NSD □u E5-E4/6 3 NSD u E5-F4/6 4 NSD u E5-G4/6 5 NSD u E5-H4/6 6 NSD u E5-K4/6 7 NSD u A6-F4/6 8 NSD u u A6-G4/6 9 NSD u A6-H4/6 10 NSD u

I

u

i NSD: No Asbestos Structures Detected -J Comments Modified TEM Level II reports only asbestos fibers >=5 microns in length Structure Density Concentration (str/mm2) (str/cc air) Grid Evaluation LJ Total Grid Openings: 10 Chrysotile Asbestos Structures: 0 <10 <0.0059 13 Grid Openings Covered > 50% I Amphibole Asbestos Structures: 0 <10 <0.0059 13 Intact Grid Opening > 50% i 13 Undissolved Filter < 10% Asbestos Structures >=5 microns: 0 <10 <0.0059 Total Non-Asbestos Structures: 13 Folded Replica < 50% Total Asbestos Structures: 0 <10 <0.0059 13 Filter Loading < 10% Analytical Sensitivity: 10 0.0059 3 Particulate Even

CITY_21MC100_0 08880379

NYC-WTC_000231563