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TEM asbestos air analysis results, Oct 2001

Machine-extracted title · confidence 95%

Laboratory report from HP Environmental Inc. detailing transmission electron microscopy analysis of an air sample received October 1, 2001.

NYC-WTC_000174937
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet sample area analyzed

Client Name: HP ENVIRONMENTAL, INC. Job#: 101101001 Volume (liters): 650.0 Lab Sample #: 02 Filter Type / Filter Area: MCE 385 mm2 Client Sample #: ET-TRL-0929-A1 Grid Opening Size: 0.01003 Received: 10/01/2001 02:00:17 Area Examined: 0.10030 mm2 Date Analyzed: 10/01/2001 Magnification: 20,ffiiw Scope #: 4 Accelerating Voltage: 100 KeV

Analysis Performed by: •7^ iU'H- WhitneYHi Grid Length Width Location Opening Fiber /tM Fiber Type Morphology EDS Orient. SAED Photo mm A9-B3/3 1 1 1.25 .06 Chrysotile Fiber Mg. Si, Fe A9-C3/3 2 NSD U A9-E3/3 3 NSD U A9-F3/3 4 NSD U A9-G3/3 5 NSD U A10-B5/4 6 NSD u A10-C5/4 7 1 2.76 .06 ’ Chrysotile Matrix Mg, Si. Fe / 40055 40055 A10-C5/4 7 2 5.5 .75 Chrysotile Bundle Mg, Si, Fe A10-E5/4 8 NSD u A10-F5/4 9 NSD u '.10-G5/4 10 NSD u

K

NSD: No Asbestos Structures Detected Comments Structure Density Concentration Total Grid Openings: 10 (str/rnm2) (str/cc air) Grid Evaluation Chrysotile Asbestos Structures; 3 29.9 0.0177 KI Grid Openings Covered > 50% Amphibole Asbestos Structures: 0 <10 <0.0059 KI Intact Grid Opening > 50% Asbestos Structures >=5 microns: 1 10.0 0.0059 K Undissolved Filter < 10% Total Non-Asbestos Structures; K Folded Replica < 50% Total Asbestos Structures: 3 29.9 0.0177 KI Filter Loading < 10% Analytical Sensitivity; 10 0.0059 K Particulate Even . 06.002246

CONFIDENTIAL, CITY_21MC100_013442368 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000174937

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NYC-WTC_000174937Source: NYC Law Department, mirrored locally

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