A visual inspection, and collection of 12 asbestos PCM samples and 12 air-o-cell samples were utilized to perform this assessment

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January 19, 2017 Ms. Alix Zapolski Zapolski Real Estate, LLC. 501 Washington Street Durham, NC 27701 Re: Limited Indoor Air Quality Assessment Asbestos & Microbial 137 E.

1 January 19, 2017 Ms. Alix Zapolski Zapolski Real Estate, LLC. 501 Washington Street Durham, NC Re: Limited Indoor Air Quality Assessment Asbestos & Microbial 137 E. Franklin Street, Chapel Hill, NC UNC Institute for the Environment EI Project No. IHMO Dear Ms. Zapolski: The EI Group, Inc. (EI) is pleased to present this report for the Limited Indoor Air Quality (IAQ) assessment performed at the UNC Institute for the Environment located on the sixth floor at 137 E. Franklin St., in Chapel Hill, North Carolina. EI was requested to determine if any airborne fungal spores or asbestos fibers were present in occupied spaces on the sixth floor. A visual inspection, and collection of 12 asbestos PCM samples and 12 air-o-cell samples were utilized to perform this assessment Site Observations Mr. Will Dunlop, visited the project site on Friday, January 13, 2017 to investigate the conditions at the facility. EI inspected the space which consisted multiple offices and common areas. No visual evidence of fungal growth was noted. Additionally, no visibly disturbed areas of asbestos were noted. Mold Sampling Air Sampling Methods and Results Sampling for airborne fungal spores was conducted in the above listed rooms inside the building to determine airborne fungal counts, the genera present, and the relative level of each genus. Air sampling was conducted utilizing ten Air-O-Cell spore-trap sampling media. All air samples were collected utilizing a high volume sampling pump, calibrated with the manufacturers supplied rotometer. The high volume sampling pump was calibrated to 15 liters per minute (LPM) with a sampling time of 5 minutes, giving a total sample volume of liters. Following collection, each sample was given a unique tracking number, placed under chain of custody, and hand delivered to EMSL Analytical Laboratory, located in Morrisville, NC for analysis by direct optical microscopy. EMSL is accredited in environmental microbiology by the American Industrial Hygiene Association. Two samples were also collected from the exterior of the building to establish baseline fungal concentrations of the exterior air. The baseline samples were collected after the collection of the indoor samples. Environmental, Health and Safety Solutions.

2 No quantitative limits exist for exposure to mold spores. Evaluation of the results obtained is performed by comparing spore levels indoors to those found outdoors at the time of sampling. Spores contained in samples collected inside should be equal to or less than, and similar in distribution, to those in outdoor air. Please reference Table 1 (below) for a summary of all sampling locations and findings. Airborne fungal spore concentrations identified in each of the sampled areas was similar in type and lower in concentration as compared to the outdoor air control sample location. A summary of Fungal Spore Sampling Results is shown at Table 1 below and sampling data analytical results is enclosed at the Laboratory Analysis Report appendix at the end of this report. Sample Location Table 1: Summary of Fungal Spore Sampling Results Sample No. Total Spore Count (cts/m 3 ) 6601A G A Elevator Lobby Exterior Rear Exterior Front The EI Group, Inc

3 Conclusions and Recommendations Results of the indoor air quality survey indicate that no excessive concentrations of airborne fungal spores are present in the occupied areas. No visual indications of suspect fungal growth were identified. The sampling and laboratory protocols used in this investigation are in accordance with standard industrial hygiene protocols for indoor air quality assessments and sampling protocol for environmental fungi. Asbestos Sampling Air Sampling Methods and Results Ten air samples were collected on 25 mm mixed cellulose ester (MCE) filters. Additionally, a field blank and a lab blank were submitted for QA purposes. The samples were analyzed by Phase Contrast Microscopy (PCM) using the National Institute Occupational Health (NIOSH) method 7400, B counting rules. Please note that PCM analysis does not distinguish between asbestos fibers and other fibers that may have been collected during the sampling process. PCM results are a count of all fibers found. The Environmental Protection Agency (EPA) requires clearance air samples to have a fiber concentration below 0.01 fiber/cubic centimeter. The analysis results are listed below in Table 2. Sample Location Table 2: Summary of PCM Sampling Results Liters of Air Total Fiber Count (fibers/cm 3 ) Elevator Lobby I B A 1250 Field Blank N/A FB Lab Blank N/A LB The EI Group, Inc

4 Conclusions and Recommendations The results of the samples collected during the abatement were below 0.01 f/cc, which indicates that there is not an elevated concentration of asbestos fibers (as of the day of sampling). Qualifications and Limitations This report summarizes our evaluation of the conditions observed throughout the sixth floor of 137 E. Franklin St.., in Chapel Hill, North Carolina. Our findings are based upon our observations and sampling results obtained at the facility at the time of our visit. The report, results, and subsequent recommendations reported herein are also limited to the information available at the time it was prepared and investigated. Conditions may have been in effect prior to the sampling events that have changed over time and which cannot be predicated within the scope of this limited investigation. Any conditions discovered which deviate from the data contained in this report should be presented to us for our evaluation Alix, we sincerely appreciate the opportunity to provide our services to you and Zapolski Real Estate. Please feel free to contact me at (919) , ext. 257 if you have any questions. Yours Truly, The EI Group, Inc. Willard R. Dunlop III Industrial Hygiene Technician Christopher B. Murray, CIH, CSP Senior Vice President, Operations Enclosures The EI Group, Inc

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7 EMSL Analytical, Inc Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) / (919) / raleighlab@emsl.com EMSL Order: Customer ID: ENVI67 Customer PO: Project ID: Attn: Will Dunlop Phone: (919) The EI Group, Inc. Fax: (919) Gateway Centre Blvd, Suite 200 Collected: 01/13/2017 Morrisville, NC 260 Received: 01/13/2017 Project: IHMO Analyzed: 01/14/2017 Test Report: Air-O-Cell( ) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods EMSL 05-TP-003, ASTM D7391) Lab Sample Number: Client Sample ID: Volume (L): Sample Location A G Spore Types Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total Alternaria Ascospores Aspergillus/Penicillium Basidiospores Bipolaris Chaetomium Cladosporium Curvularia Epicoccum Fusarium Ganoderma Myxomycetes Pithomyces Rust Scopulariopsis Stachybotrys Torula Ulocladium Unidentifiable Spores Zygomycetes Spegazzinia Total Fungi Hyphal Fragment Insect Fragment Pollen Analyt. Sensitivity 600x Analyt. Sensitivity 300x - 13* * * - Skin Fragments (1-4) Fibrous Particulate (1-4) Background (1-5) Bipolaris++ = Bipolaris/Drechslera/Exserohilum Myxomycetes++ = Myxomycetes/Periconia/Smut No discernable field blank was submitted with this group of samples. Alan Goldstein, Ph.D., Laboratory Manager or other approved signatory High levels of background particulate can obscure spores and other particulates leading to underestimation. Background levels of 5 indicate an overloading of background particulates, prohibiting accurate detection and quantification. Present = Spores detected on overloaded samples. Results are not blank corrected unless otherwise noted. The detection limit is equal to one fungal spore, structure, pollen, fiber particle or insect fragment. "*" Denotes particles found at 300X. "-" Denotes not detected. Due to method stopping rules, raw counts in excess of 100 are extrapolated based on the percentage analyzed. EMSL maintains liability limited to cost of analysis. This report relates only to the samples reported above and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. Interpretation and use of test results are the responsibility of the client. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Morrisville, NC AIHA-LAP, LLC--EMLAP Lab Report amended: 01/16/ :44:58 Replaces initial report from: 01/14/ :32:21 Reason Code: Data Entry-Change to Location For information on the fungi listed in this report, please visit the Resources section at MIC_M001_0002_ Printed: 01/16/ :45 AM Page 1 of 4

8 EMSL Analytical, Inc Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) / (919) / raleighlab@emsl.com EMSL Order: Customer ID: ENVI67 Customer PO: Project ID: Attn: Will Dunlop Phone: (919) The EI Group, Inc. Fax: (919) Gateway Centre Blvd, Suite 200 Collected: 01/13/2017 Morrisville, NC 260 Received: 01/13/2017 Project: IHMO Analyzed: 01/14/2017 Test Report: Air-O-Cell( ) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods EMSL 05-TP-003, ASTM D7391) Lab Sample Number: Client Sample ID: Volume (L): Sample Location Elevator Spore Types Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total Alternaria Ascospores Aspergillus/Penicillium Basidiospores Bipolaris Chaetomium Cladosporium Curvularia Epicoccum Fusarium Ganoderma Myxomycetes Pithomyces Rust Scopulariopsis Stachybotrys Torula Ulocladium Unidentifiable Spores Zygomycetes Spegazzinia Total Fungi Hyphal Fragment Insect Fragment Pollen Analyt. Sensitivity 600x Analyt. Sensitivity 300x - 13* * * - Skin Fragments (1-4) Fibrous Particulate (1-4) Background (1-5) Bipolaris++ = Bipolaris/Drechslera/Exserohilum Myxomycetes++ = Myxomycetes/Periconia/Smut No discernable field blank was submitted with this group of samples. Alan Goldstein, Ph.D., Laboratory Manager or other approved signatory High levels of background particulate can obscure spores and other particulates leading to underestimation. Background levels of 5 indicate an overloading of background particulates, prohibiting accurate detection and quantification. Present = Spores detected on overloaded samples. Results are not blank corrected unless otherwise noted. The detection limit is equal to one fungal spore, structure, pollen, fiber particle or insect fragment. "*" Denotes particles found at 300X. "-" Denotes not detected. Due to method stopping rules, raw counts in excess of 100 are extrapolated based on the percentage analyzed. EMSL maintains liability limited to cost of analysis. This report relates only to the samples reported above and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. Interpretation and use of test results are the responsibility of the client. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Morrisville, NC AIHA-LAP, LLC--EMLAP Lab Report amended: 01/16/ :44:58 Replaces initial report from: 01/14/ :32:21 Reason Code: Data Entry-Change to Location For information on the fungi listed in this report, please visit the Resources section at MIC_M001_0002_ Printed: 01/16/ :45 AM Page 2 of 4

9 EMSL Analytical, Inc Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) / (919) / raleighlab@emsl.com EMSL Order: Customer ID: ENVI67 Customer PO: Project ID: Attn: Will Dunlop Phone: (919) The EI Group, Inc. Fax: (919) Gateway Centre Blvd, Suite 200 Collected: 01/13/2017 Morrisville, NC 260 Received: 01/13/2017 Project: IHMO Analyzed: 01/14/2017 Test Report: Air-O-Cell( ) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods EMSL 05-TP-003, ASTM D7391) Lab Sample Number: Client Sample ID: Volume (L): Sample Location A Spore Types Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total Alternaria Ascospores Aspergillus/Penicillium Basidiospores Bipolaris Chaetomium Cladosporium * 40* 33.3 Curvularia Epicoccum Fusarium Ganoderma Myxomycetes * 10* Pithomyces Rust Scopulariopsis Stachybotrys Torula Ulocladium Unidentifiable Spores Zygomycetes Spegazzinia Total Fungi Hyphal Fragment Insect Fragment Pollen Analyt. Sensitivity 600x Analyt. Sensitivity 300x - 13* * * - Skin Fragments (1-4) Fibrous Particulate (1-4) Background (1-5) Bipolaris++ = Bipolaris/Drechslera/Exserohilum Myxomycetes++ = Myxomycetes/Periconia/Smut No discernable field blank was submitted with this group of samples. Alan Goldstein, Ph.D., Laboratory Manager or other approved signatory High levels of background particulate can obscure spores and other particulates leading to underestimation. Background levels of 5 indicate an overloading of background particulates, prohibiting accurate detection and quantification. Present = Spores detected on overloaded samples. Results are not blank corrected unless otherwise noted. The detection limit is equal to one fungal spore, structure, pollen, fiber particle or insect fragment. "*" Denotes particles found at 300X. "-" Denotes not detected. Due to method stopping rules, raw counts in excess of 100 are extrapolated based on the percentage analyzed. EMSL maintains liability limited to cost of analysis. This report relates only to the samples reported above and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. Interpretation and use of test results are the responsibility of the client. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Morrisville, NC AIHA-LAP, LLC--EMLAP Lab Report amended: 01/16/ :44:58 Replaces initial report from: 01/14/ :32:21 Reason Code: Data Entry-Change to Location For information on the fungi listed in this report, please visit the Resources section at MIC_M001_0002_ Printed: 01/16/ :45 AM Page 3 of 4

10 EMSL Analytical, Inc Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) / (919) / raleighlab@emsl.com EMSL Order: Customer ID: ENVI67 Customer PO: Project ID: Attn: Will Dunlop Phone: (919) The EI Group, Inc. Fax: (919) Gateway Centre Blvd, Suite 200 Collected: 01/13/2017 Morrisville, NC 260 Received: 01/13/2017 Project: IHMO Analyzed: 01/14/2017 Test Report: Air-O-Cell( ) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods EMSL 05-TP-003, ASTM D7391) Lab Sample Number: Client Sample ID: Volume (L): Sample Location Ext. 1 Franklin St Ext. 2 Alley Behind Bldg. Spore Types Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total Alternaria Ascospores Aspergillus/Penicillium Basidiospores Bipolaris Chaetomium Cladosporium * 10* Curvularia Epicoccum Fusarium Ganoderma Myxomycetes Pithomyces Rust Scopulariopsis Stachybotrys Torula Ulocladium Unidentifiable Spores Zygomycetes Spegazzinia * 10* 0.4 Total Fungi Hyphal Fragment Insect Fragment Pollen Analyt. Sensitivity 600x Analyt. Sensitivity 300x - 13* * * - Skin Fragments (1-4) Fibrous Particulate (1-4) Background (1-5) Bipolaris++ = Bipolaris/Drechslera/Exserohilum Myxomycetes++ = Myxomycetes/Periconia/Smut No discernable field blank was submitted with this group of samples. Alan Goldstein, Ph.D., Laboratory Manager or other approved signatory High levels of background particulate can obscure spores and other particulates leading to underestimation. Background levels of 5 indicate an overloading of background particulates, prohibiting accurate detection and quantification. Present = Spores detected on overloaded samples. Results are not blank corrected unless otherwise noted. The detection limit is equal to one fungal spore, structure, pollen, fiber particle or insect fragment. "*" Denotes particles found at 300X. "-" Denotes not detected. Due to method stopping rules, raw counts in excess of 100 are extrapolated based on the percentage analyzed. EMSL maintains liability limited to cost of analysis. This report relates only to the samples reported above and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. Interpretation and use of test results are the responsibility of the client. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Morrisville, NC AIHA-LAP, LLC--EMLAP Lab Report amended: 01/16/ :44:58 Replaces initial report from: 01/14/ :32:21 Reason Code: Data Entry-Change to Location For information on the fungi listed in this report, please visit the Resources section at MIC_M001_0002_ Printed: 01/16/ :45 AM Page 4 of 4

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13 EMSL Analytical, Inc Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) / (919) / raleighlab@emsl.com EMSL Order: Customer ID: Customer PO: Project ID: ENVI67 Attention: Will Dunlop Phone: (919) The EI Group, Inc. Fax: (919) Gateway Centre Blvd, Suite 200 Received Date: 01/13/2017 4:30 PM Morrisville, NC 260 Analysis Date: 01/16/2017 Collected Date: 01/13/2017 Project: IHMO Test Report: Fiber Count by Phase Contrast Microscopy (PCM), NIOSH 7400 Method, Revision 3, Issue 2, 8/15/94 Sample Location Sample Date Volume (liters) Fibers Fields LOD (fib/cc) Fibers/ mm² Fibers/ cc Notes 6118 Clearance Sample 1 1/13/ < < Clearance Sample 2 1/13/ < < Clearance Sample 3 1/13/ < < Clearance Sample 4 1/13/ < < Elevator Clearance Sample 5 1/13/ Clearance Sample 6 1/13/ < < Clearance Sample 7 1/13/ < < IU Clearance Sample 8 1/13/ < < B Clearance Sample 9 1/13/ < < A Clearance Sample 10 1/13/ < < FB Field Blank 1/13/2017 < <7.01 Field Blank LB Lab Blank 1/13/2017 < <7.01 Lab Blank The results reported have been blank corrected as applicable. Limit of detection is 7 fibers/mm². Intra-laboratory Sr values: 5-20 fibers = 0.21, fibers = 0.12, fibers = Inter-laboratory Sr values (Average of EMSL round robin data) = EMSL maintains liability limited to cost of analysis. This report relates only to the samples reported above and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. Interpretation and use of test results are the responsibility of the client. EMSL is not responsible for data reported in fibers/cc, which is dependent on volume collected by non-laboratory personnel. Results have been blank corrected as applicable. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Morrisville, NC AIHA-LAP, LLC--EMLAP Accredited # Initial report from: 01/16/ :49:14 ASB_PCM_NoSig_0003 Printed: 1/16/2017 2:49 PM Page 1 of 2

14 EMSL Analytical, Inc Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) / (919) / raleighlab@emsl.com EMSL Order: Customer ID: Customer PO: Project ID: ENVI67 Attention: Will Dunlop Phone: (919) The EI Group, Inc. Fax: (919) Gateway Centre Blvd, Suite 200 Received Date: 01/13/2017 4:30 PM Morrisville, NC 260 Analysis Date: 01/16/2017 Collected Date: 01/13/2017 Project: IHMO Test Report: Fiber Count by Phase Contrast Microscopy (PCM), NIOSH 7400 Method, Revision 3, Issue 2, 8/15/94 Sample Location Sample Date Volume (liters) Fibers Fields LOD (fib/cc) Fibers/ mm² Fibers/ cc Notes Analyst(s): Joshua Moorman PCM (12) Billy Barnes, Asbestos Lab Manager or Other Approved Signatory Limit of detection is 7 fibers/mm². Intra-laboratory Sr values: 5-20 fibers = 0.21, fibers = 0.12, fibers = Inter-laboratory Sr values (Average of EMSL round robin data) = EMSL maintains liability limited to cost of analysis. This report relates only to the samples reported above and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. Interpretation and use of test results are the responsibility of the client. EMSL is not responsible for data reported in fibers/cc, which is dependent on volume collected by non-laboratory personnel. Results have been blank corrected as applicable. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Morrisville, NC AIHA-LAP, LLC--EMLAP Accredited # Initial report from: 01/16/ :49:14 ASB_PCM_NoSig_0003 Printed: 1/16/2017 2:49 PM Page 2 of 2

A visual inspection, and collection of 10 asbestos PCM samples and 12 air-o-cell samples were utilized to perform this assessment

A visual inspection, and collection of 10 asbestos PCM samples and 12 air-o-cell samples were utilized to perform this assessment December 9, 2016 Ms. Alix Zapolski Zapolski Real Estate, LLC. 501 Washington Street Durham, NC 27701 Re: Limited Indoor Air Quality Assessment Asbestos & Microbial 137 E. Franklin Street, Chapel Hill,