February 15, 2019 GEM Environmental P.O. Box 9053 Missoula, MT CLIENT PROJECT: U of M - Cringhead Room 106A + 107A, LAB CODE: T Dea

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8 February 15, 2019 GEM Environmental P.O. Box 9053 Missoula, MT CLIENT PROJECT: U of M - Cringhead Room 106A + 107A, LAB CODE: T Dear Customer: Enclosed are asbestos analysis results for TEM air samples received at our laboratory on February 15, The samples were analyzed for asbestos using transmission electron microscopy (TEM) per the EPA AHERA Method. The current EPA TEM clearance standard based on five sample average results is 70 structures per square millimeter. The analytical sensitivity for the EPA AHERA method is structures per cubic centimeter. Thank you for your business and we look forward to continuing good relations. Kind Regards, Tianbao Bai, Ph.D., CIH Laboratory Director 730 SE Maynard Road Cary, NC

9 ASBESTOS ANALYTICAL REPORT By: Transmission Electron Microscopy Prepared for GEM Environmental CLIENT PROJECT: U of M - Cringhead Room 106A + 107A, LAB CODE: T TEST METHOD: EPA AHERA REPORT DATE: 02/15/19

10 ASBESTOS AIR ANALYSIS By: TRANSMISSION ELECTRON MICROSCOPY Client: GEM Environmental P.O. Box 9053 Missoula, MT Lab Code: T Date Received: Date Analyzed: Date Reported: Project: U of M - Cringhead Room 106A + 107A, TEM AIR AHERA Client ID Lab ID Volume (Liters) Area Analyzed mm 2 Grid Openings Examined Analytical Sensitivity S/cc Asbestos Identification Type TEM-106A None T93575 Detected Asbestos Structures 5 µm <5.0 µm Asbestos Concentration S/mm 2 S/cc 0 0 <16.8 <0.005 TEM-107A None T93576 Detected TEM-107A None T93577 Detected 0 0 <20.2 < <16.8 <0.005 Page 1 of 2

11 LEGEND: None METHOD: EPA AHERA AVERAGE GRID OPENING SIZE:.0099 mm 2 ANALYTICAL SENSITIVITY: structures/cc REGULATORY LIMIT: 70 structures / mm 2 ANALYTICAL EQUIPMENT: JEOL Electron Microscope (JEM-1200 EXII) NORAN EDS System 7 (NSS112E) This report relates only to the samples tested or analyzed and may not be reproduced, except in full, without written approval by Eurofins CEI. Eurofins CEI makes no warranty representation regarding the accuracy of client submitted information in preparing and presenting analytical results. Interpretation of the analytical results is the sole responsibility of the client. Samples were received in acceptable condition unless otherwise noted. This report may not be used by the client to claim product endorsement by NVLAP or any other agency of the U. S. Government. Digital images of diffraction patterns and copies of analytical bench sheets pertaining to this project are available upon request. The estimated measurement of uncertainty for the test results is also available upon request. The laboratory is not responsible for data collected by personnel who are not part of the laboratory. Results reported in both structures/cm 3 and structures/mm 2 are dependent on the volume of air sampled and measured by non-laboratory personnel and are not covered by the laboratory's NVLAP accreditation. Information provided by customer includes customer sample ID, location, volume and area as well as date and time of sampling. No Field Blanks were submitted for project T ANALYST: Brunilda Gjoka APPROVED BY: Tianbao Bai, Ph.D., CIH Laboratory Director Page 2 of 2

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14 February 15, 2019 GEM Environmental P.O. Box 9053 Missoula, MT CLIENT PROJECT: U of M - Cringhead Room 106A + 107A, LAB CODE: T Dear Customer: Enclosed are asbestos analysis results for TEM dust wipe samples received at our laboratory on February 15, The samples were analyzed for asbestos using transmission electron microscopy (TEM) per ASTM D Method. Currently, there is no regulatory limit for asbestos in dust. The analytical sensitivity for the ASTM D method is 1,000 structures per square centimeter. Thank you for your business and we look forward to continuing good relations. Kind Regards, Tianbao Bai, Ph.D., CIH Laboratory Director 730 SE Maynard Road Cary, NC

15 ASBESTOS ANALYTICAL REPORT By: Transmission Electron Microscopy Prepared for GEM Environmental CLIENT PROJECT: U of M - Cringhead Room 106A + 107A, LAB CODE: T TEST METHOD: Dust Wipe ASTM D REPORT DATE: 02/15/19

16 ASBESTOS DUST ANALYSIS By: TRANSMISSION ELECTRON MICROSCOPY Client: GEM Environmental P.O. Box 9053 Missoula, MT Lab Code: T Date Received: Date Analyzed: Date Reported: Project: U of M - Cringhead Room 106A + 107A, TEM DUST WIPE (ASTM D ) Client ID Lab ID AHA-W-106A -02 T93578 Area Sampled (cm 2 ) Area Analyzed (mm 2 ) Filtration Factor Analytical Sensitivity (s/cm 2 ) # of Structures Asbestos Type Concentration (s/cm 2 ) Chrysotile 53,000 AHA-W-106A -01 T93579 AHA-W-106A -03 T93580 AHA-W-107A -01 T93581 AHA-W-107A -02 T93582 AHA-W-107A -03 T Chrysotile 3, Chrysotile Chrysotile 2, Chrysotile 17, , Chrysotile 48,000 Page 1 of 2

17 LEGEND: None METHOD: ASTM D ANALYTICAL SENSITIVITY: 1,000 structures/cm 2 REGULATORY LIMIT: None This report relates only to the samples tested or analyzed and may not be reproduced, except in full, without written approval by Eurofins CEI. Eurofins CEI makes no warranty representation regarding the accuracy of client submitted information in preparing and presenting analytical results. Interpretation of the analytical results is the sole responsibility of the client. Estimated measurement of uncertainty is available on request. Samples were received in acceptable condition unless otherwise noted. Information provided by customer includes customer sample ID, location, volume and area as well as date and time of sampling. ANALYST: Amanda Rucinski APPROVED BY: Tianbao Bai, Ph.D., CIH Laboratory Director Page 2 of 2

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