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

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. Franklin Street, Chapel Hill, NC UNC Institute for the Environment EI Project No. IHMO160216.00 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.

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 23610451 240 6501G 23610642 240 6310 23610452 80 6320 23610484 140 6702 23610521 240 6101 236383 100 6112 23610513 10 6208A 23610649 120 6202 236359 80 Elevator Lobby 23610476 80 Exterior Rear 236329 2270 Exterior Front 23610481 680 The EI Group, Inc. 800.717.3472 www.ei1.com

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 ) 6118 1220 6112 1220 6208 1221 6101 1220 Elevator Lobby 1219 6310 1230 6323 1230 6501-I 1240 6601-B 1250 6701-A 1250 Field Blank N/A FB Lab Blank N/A LB The EI Group, Inc. 800.717.3472 www.ei1.com

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) 657-00, 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. 800.717.3472 www.ei1.com

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EMSL Analytical, Inc. 2500 Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) 465-3900 / (919) 465-3950 http://www.emsl.com / raleighlab@emsl.com EMSL Order: 291700357 Customer ID: ENVI67 Customer PO: Project ID: Attn: Will Dunlop Phone: (919) 657-00 The EI Group, Inc. Fax: (919) 657-51 2101 Gateway Centre Blvd, Suite 200 Collected: 01/13/2017 Morrisville, NC 260 Received: 01/13/2017 Project: IHMO160216.00 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 291700357-0001 23610451 6601A 291700357-0002 23610642 6501G 291700357-0003 23610452 6310 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 5 200 83.3 4 200 83.3 1 40 50 Bipolaris++ - - - - - - - - - Chaetomium - - - - - - - - - Cladosporium 1 40 16.7 1 40 16.7 - - - Curvularia - - - - - - - - - Epicoccum - - - - - - - - - Fusarium - - - - - - - - - Ganoderma - - - - - - - - - Myxomycetes++ - - - - - - 1 40 50 Pithomyces - - - - - - - - - Rust - - - - - - - - - Scopulariopsis - - - - - - - - - Stachybotrys - - - - - - - - - Torula - - - - - - - - - Ulocladium - - - - - - - - - Unidentifiable Spores - - - - - - - - - Zygomycetes - - - - - - - - - Spegazzinia - - - - - - - - - Total Fungi 6 240 100 5 240 100 2 80 100 Hyphal Fragment - - - 1 40-1 40 - Insect Fragment - - - - - - - - - Pollen - - - - - - - - - Analyt. Sensitivity 600x - 42 - - 42 - - 42 - Analyt. Sensitivity 300x - 13* - - 13* - - 13* - Skin Fragments (1-4) - 3 - - 3 - - 3 - Fibrous Particulate (1-4) - 1 - - 1 - - 1 - Background (1-5) - 1 - - 1 - - 1 - 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 173741 Report amended: 01/16/2017 06:44:58 Replaces initial report from: 01/14/2017 08:32:21 Reason Code: Data Entry-Change to Location For information on the fungi listed in this report, please visit the Resources section at www.emsl.com MIC_M001_0002_0001 1.71 Printed: 01/16/2017 06:45 AM Page 1 of 4

EMSL Analytical, Inc. 2500 Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) 465-3900 / (919) 465-3950 http://www.emsl.com / raleighlab@emsl.com EMSL Order: 291700357 Customer ID: ENVI67 Customer PO: Project ID: Attn: Will Dunlop Phone: (919) 657-00 The EI Group, Inc. Fax: (919) 657-51 2101 Gateway Centre Blvd, Suite 200 Collected: 01/13/2017 Morrisville, NC 260 Received: 01/13/2017 Project: IHMO160216.00 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 291700357-0004 23610484 6320 291700357-0005 23610521 6702 291700357-0006 23610476 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 3 100 71.4 4 200 83.3 2 80 100 Bipolaris++ - - - - - - - - - Chaetomium - - - - - - - - - Cladosporium 1 40 28.6 1 40 16.7 - - - Curvularia - - - - - - - - - Epicoccum - - - - - - - - - Fusarium - - - - - - - - - Ganoderma - - - - - - - - - Myxomycetes++ - - - - - - - - - Pithomyces - - - - - - - - - Rust - - - - - - - - - Scopulariopsis - - - - - - - - - Stachybotrys - - - - - - - - - Torula - - - - - - - - - Ulocladium - - - - - - - - - Unidentifiable Spores - - - - - - - - - Zygomycetes - - - - - - - - - Spegazzinia - - - - - - - - - Total Fungi 4 140 100 5 240 100 2 80 100 Hyphal Fragment - - - - - - 1 40 - Insect Fragment - - - - - - - - - Pollen - - - - - - - - - Analyt. Sensitivity 600x - 42 - - 42 - - 42 - Analyt. Sensitivity 300x - 13* - - 13* - - 13* - Skin Fragments (1-4) - 3 - - 3 - - 3 - Fibrous Particulate (1-4) - 1 - - 1 - - 1 - Background (1-5) - 1 - - 1 - - 2 - 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 173741 Report amended: 01/16/2017 06:44:58 Replaces initial report from: 01/14/2017 08:32:21 Reason Code: Data Entry-Change to Location For information on the fungi listed in this report, please visit the Resources section at www.emsl.com MIC_M001_0002_0001 1.71 Printed: 01/16/2017 06:45 AM Page 2 of 4

EMSL Analytical, Inc. 2500 Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) 465-3900 / (919) 465-3950 http://www.emsl.com / raleighlab@emsl.com EMSL Order: 291700357 Customer ID: ENVI67 Customer PO: Project ID: Attn: Will Dunlop Phone: (919) 657-00 The EI Group, Inc. Fax: (919) 657-51 2101 Gateway Centre Blvd, Suite 200 Collected: 01/13/2017 Morrisville, NC 260 Received: 01/13/2017 Project: IHMO160216.00 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 291700357-0007 236383 6101 291700357-0008 23610513 6112 291700357-0009 23610649 6208A 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 3 100 100 - - - 2 80 66.7 Bipolaris++ - - - - - - - - - Chaetomium - - - - - - - - - Cladosporium - - - - - - 3* 40* 33.3 Curvularia - - - - - - - - - Epicoccum - - - - - - - - - Fusarium - - - - - - - - - Ganoderma - - - - - - - - - Myxomycetes++ - - - 1* 10* 100 - - - Pithomyces - - - - - - - - - Rust - - - - - - - - - Scopulariopsis - - - - - - - - - Stachybotrys - - - - - - - - - Torula - - - - - - - - - Ulocladium - - - - - - - - - Unidentifiable Spores - - - - - - - - - Zygomycetes - - - - - - - - - Spegazzinia - - - - - - - - - Total Fungi 3 100 100 1 10 100 5 120 100 Hyphal Fragment - - - - - - - - - Insect Fragment - - - - - - - - - Pollen - - - - - - - - - Analyt. Sensitivity 600x - 42 - - 42 - - 42 - Analyt. Sensitivity 300x - 13* - - 13* - - 13* - Skin Fragments (1-4) - 3 - - 3 - - 3 - Fibrous Particulate (1-4) - 1 - - 1 - - 1 - Background (1-5) - 1 - - 1 - - 1 - 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 173741 Report amended: 01/16/2017 06:44:58 Replaces initial report from: 01/14/2017 08:32:21 Reason Code: Data Entry-Change to Location For information on the fungi listed in this report, please visit the Resources section at www.emsl.com MIC_M001_0002_0001 1.71 Printed: 01/16/2017 06:45 AM Page 3 of 4

EMSL Analytical, Inc. 2500 Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) 465-3900 / (919) 465-3950 http://www.emsl.com / raleighlab@emsl.com EMSL Order: 291700357 Customer ID: ENVI67 Customer PO: Project ID: Attn: Will Dunlop Phone: (919) 657-00 The EI Group, Inc. Fax: (919) 657-51 2101 Gateway Centre Blvd, Suite 200 Collected: 01/13/2017 Morrisville, NC 260 Received: 01/13/2017 Project: IHMO160216.00 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 291700357-0010 236359 6202 291700357-0011 23610481 Ext. 1 Franklin St. 291700357-0012 236329 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 - - - 2 80 11.8 2 80 3.5 Aspergillus/Penicillium - - - - - - - - - Basidiospores 2 80 100 14 590 86.8 45 1900 83.7 Bipolaris++ - - - - - - - - - Chaetomium - - - - - - - - - Cladosporium - - - 1* 10* 1.5 5 200 8.8 Curvularia - - - - - - - - - Epicoccum - - - - - - 2 80 3.5 Fusarium - - - - - - - - - Ganoderma - - - - - - - - - Myxomycetes++ - - - - - - - - - Pithomyces - - - - - - - - - Rust - - - - - - - - - Scopulariopsis - - - - - - - - - Stachybotrys - - - - - - - - - Torula - - - - - - - - - Ulocladium - - - - - - - - - Unidentifiable Spores - - - - - - - - - Zygomycetes - - - - - - - - - Spegazzinia - - - - - - 1* 10* 0.4 Total Fungi 2 80 100 17 680 100 55 2270 100 Hyphal Fragment - - - 1 40 - - - - Insect Fragment - - - - - - - - - Pollen - - - - - - - - - Analyt. Sensitivity 600x - 42 - - 42 - - 42 - Analyt. Sensitivity 300x - 13* - - 13* - - 13* - Skin Fragments (1-4) - 3 - - 1 - - 1 - Fibrous Particulate (1-4) - 1 - - 1 - - - - Background (1-5) - 1 - - 3 - - 1 - 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 173741 Report amended: 01/16/2017 06:44:58 Replaces initial report from: 01/14/2017 08:32:21 Reason Code: Data Entry-Change to Location For information on the fungi listed in this report, please visit the Resources section at www.emsl.com MIC_M001_0002_0001 1.71 Printed: 01/16/2017 06:45 AM Page 4 of 4

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EMSL Analytical, Inc. 2500 Gateway Centre Blvd., Suite 600 Morrisville, NC 260 Tel/Fax: (919) 465-3900 / (919) 465-3950 http://www.emsl.com / raleighlab@emsl.com EMSL Order: Customer ID: Customer PO: Project ID: 291700358 ENVI67 Attention: Will Dunlop Phone: (919) 657-00 The EI Group, Inc. Fax: (919) 657-51 2101 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: IHMO160216.00 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 1/13/2017 1220.00 <5.5 100 0.002 <7.01 291700358-0001 6112 Clearance Sample 2 1/13/2017 1220.00 <5.5 100 0.002 <7.01 291700358-0002 6208 Clearance Sample 3 1/13/2017 1221.00 <5.5 100 0.002 <7.01 291700358-0003 6101 Clearance Sample 4 1/13/2017 1220.00 <5.5 100 0.002 <7.01 291700358-0004 Elevator Clearance Sample 5 1/13/2017 1219.00 7.5 100 0.002 9.55 0.003 291700358-0005 6310 Clearance Sample 6 1/13/2017 1230.00 <5.5 100 0.002 <7.01 291700358-0006 6323 Clearance Sample 7 1/13/2017 1230.00 <5.5 100 0.002 <7.01 291700358-0007 6501IU Clearance Sample 8 1/13/2017 1240.00 <5.5 100 0.002 <7.01 291700358-0008 6601B Clearance Sample 9 1/13/2017 1250.00 <5.5 100 0.002 <7.01 291700358-0009 6701A Clearance Sample 10 1/13/2017 1250.00 <5.5 100 0.002 <7.01 291700358-0010 FB Field Blank 1/13/2017 <5.5 100 <7.01 Field Blank 291700358-0011 LB Lab Blank 1/13/2017 <5.5 100 <7.01 Lab Blank 291700358-0012 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, 21-50 fibers = 0.12, 51-100 fibers = 0. 11. Inter-laboratory Sr values (Average of EMSL round robin data) = 0.29. 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 #173741 Initial report from: 01/16/2017 14:49:14 ASB_PCM_NoSig_0003 Printed: 1/16/2017 2:49 PM Page 1 of 2