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DocuSign Envelope ID:6A1278D6-4287-4002-98A9-C69C8C1 D313E <br /> rESG Environmental Indoor Environmental Air Quality Assessment <br /> Solutions <br /> Group <br /> IAQ Technician: Scott Sumner, CMI, IICRC AMRT Certified <br /> Council-certified Microbial Investigator* <br /> Institute of Inspection,Cleaning and Restoration Certification,Applied Microbial Remediation Technician <br /> Reviewed by: Susan Burns, CRIE <br /> Council-certified Residential Indoor Environmentalist* <br /> Dan Whittaker, CIEC, CMI <br /> Council-certified Indoor Environmental Consultant* <br /> Council-certified Microbial Investigator* <br /> *Board-awarded by the American Council for Accredited Certification <br /> Date of assessment: 12/10/2021 <br /> Prepared for: Orange County <br /> Building Characteristics: <br /> Address: 101 Edgar Street,Chapel Hill,NC 27516 <br /> Type: One-Story Commercial/Office building on a slab foundation <br /> Environmental Solutions Group(ESG)was contracted to perform an indoor air quality and moisture <br /> assessment for a building located at the address above. Several of the employees reported suspect <br /> microbial growth on chairs in a closet and suspect growth was observed on several of the supply vents. <br /> Real-time measurements of the indoor air quality(IAQ)were collected in the building, along with a <br /> visual observation for potential air quality hazards. Moisture meter readings were collected in conjunction <br /> with visual observations for moisture intrusion issues.Air samples for microbial laboratory analysis were <br /> collected in multiple rooms and outdoors for reference.Also, several direct swab samples for laboratory <br /> analysis were collected where microbial growth was observed. <br /> The following items were observed during the investigation. <br /> Main Observations: <br /> • Visible microbial growth was observed on most of the contents throughout the building(refer to <br /> images 3-5, 7, 8, 10 and 15 below). <br /> • Visible microbial growth was observed on most of the walls, ceilings and supply registers <br /> throughout the building(refer to images 2,4, 6, 9, and 11-18). <br /> • Particle counts were elevated in most areas tested. <br /> IAQ Data: <br /> • Particle counts collected indoors were elevated in several areas,particularly in the 0.3, 0.5 and 1.0 <br /> (smaller)micron size ranges. <br /> o Elevated airborne particles have been proven to reduce energy and productivity in <br /> occupants, and can transport chemicals, odors and bacteria which may allow for odor <br /> issues or adverse health effects for sensitive or immunocompromised individuals. <br /> Maintaining low particulate levels will be useful for helping prevent future IAQ-related <br /> issues. <br /> o Airborne particulates indoors may be due to a combination of factors,which generally are <br /> connected to overall occupant disturbances and general indoor dust levels. Other sources <br /> that can cause elevated particle counts include carpeting,water-damaged building <br /> materials,mold,improper exhausting of contaminants(such as in bathrooms and cooking <br /> Environmental Solutions Group • 7 Maple Leaf Drive,Ste 104, Greensboro, NC 27410 • 336-373-1538 1 <br /> www.Go-ESG.com <br />