2021-482-E-AMS-Sasser Companies-Emergency Services 510 meadlowlands drive warehouse remediation

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Environmental Solutions Group ● 7 Maple Leaf Drive., Greensboro, NC 27401 ● 336-373-1538 ● www.Go-ESG.com 3 Report with Protocols for Remediation Environmental Solutions Group Leading people, companies and communities to live, work and prosper in a sustainable environment. o Signs of light microbial growth were observed on some of the contents stored within the warehouse. These contents were removed prior to ESG’s assessment. o The warehouse is unconditioned and builds up dust quickly, due to the main air and ventilation being introduced directly from outdoors via large fans near the top of the warehouse walls. ESG measured relative humidity measurements all above 84% within the warehouse during the data collection. ▪ Moisture issues and microbial growth can begin to occur when humidity levels remain above 60%. Indoor Air Quality and Biological Contaminants: ASHRAE 62.1 defines acceptable indoor air quality as “air in which there are no known contaminants as determined by cognizant authorities and with which a substantial majority (80% or more) of people exposed do not express dissatisfaction.” Indoor air biocontamination can be defined as an accumulation of a variety of biological agents and/or their byproducts on a surface, with the potential to become airborne and induce allergenic, infectious, or toxic responses in exposed individuals. Bio contaminants may include but are not limited to, bacteria, fungi, protozoa, microbial toxins, pollens, dust mites, and insect parts. Biocontamination due to moisture can lead to exposure to fungal particles not found in outdoor air. These particles contain allergens, triple helical glucan and co-occurring toxins that are associated with exacerbation of asthma and upper respiratory disease. Recent panels have found that the remediation of moisture and microbial growth in public buildings was justified in terms of improved public health. Air Sample Findings: Air samples to be analyzed for total airborne spores were collected in the interior of the warehouse, and outdoors for comparison purposes. The samples were collected using Micro-5 cassettes connected to a calibrated Buck Libra low-flow sampling pump for collection of total fungal spores, viable and non-viable, which provides a reliable profile of airborne fungi within 24 hours of collection. Below are the significant findings: • 8/4/21 report o An elevated (3,760 counts/m3) level of the pathogenic fungi Aspergillus/Penicillium-like was identified at the rear section of the warehouse. A 0 count was identified outdoors on the day of the assessment. ▪ Aspergillus and Penicillium are two of the most commonly found pathogenic fungi in problem buildings. Because the spores of Aspergillus and Penicillium are very similar, they are not differentiated by microscopic analysis and are reported together. These fungal types are considered an indication of a current or prior moisture issue in a building. o An elevated (4,080 counts/m3) level of the allergenic fungi Cladosporium was identified at the rear section of the warehouse. A 440 count was identified outdoors on the day of the assessment. ▪ Cladosporium grows indoors at low concentrations in damp or humid areas, but may be found in high concentrations in water-damaged building materials. Classified as a leaf surface mold, its identification indoors is not necessarily a sign of moisture indoors. It is commonly seen on windowsills, painted walls and a variety of cellulose materials. Its ability to sporulate heavily and become airborne makes it an important allergen when found in high levels. o An elevated (1,120 counts/m3) level of the allergenic fungi Cladosporium was identified at the front section of the warehouse. A 440 count was identified outdoors on the day of the assessment. • 9/14/20 report o A slightly elevated (760 counts/m3) level of the pathogenic fungi Aspergillus/Penicillium-like was identified at the interior of the building near the left entry door to the warehouse. A 0-160 count was identified outdoors during outdoor comparison samples. DocuSign Envelope ID: A9A4637A-BE59-4285-99BE-D253C29FA836