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Indoor Environmental Air Quality Assessment <br /> <br />Environmental Solutions Group ● 7 Maple Leaf Drive, Ste 104, Greensboro, NC 27410 ● 336-373-1538 <br />www.Go-ESG.com <br />1 <br /> <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: 8/26/21 <br /> <br />Prepared for: Angel Barnes, (Orange County), 109 Court Street, Hillsborough, NC 27278 <br />Building Characteristics: <br />Type: Commercial office building <br /> <br />Environmental Solutions Group (ESG) was contracted to perform an indoor air quality and moisture <br />assessment for the building located at the address listed above. Visible microbial growth was observed on <br />some walls behind the vinyl wall covering discovered during a recent renovation. Orange County is aware <br />that there were previous roof leaks and that the walls in this room had vinyl wall covering. They would <br />like us to assess this room and adjacent areas to determine the extent of the contamination. <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 throughout the <br />building in conjunction with visual observations for moisture intrusion issues. Air samples for microbial <br />laboratory analysis were collected in the affected room, in an adjacent room and outdoors for reference. <br />Also, a direct swab exam for laboratory analysis was collected from a wall in room 7 where suspect <br />microbial growth was observed. <br />The following items were observed during the investigation. <br />Main Observations: <br />• Visible microbial growth was observed on several of the walls in room 7 (refer to images 1-6 <br />below). <br />• The building is currently undergoing renovation. Demolition of several of the building <br />components had been done and the building was in a disturbed condition. <br />• The drywall on one of the walls in room 7 measured wet with a moisture meter (refer to images 1, <br />5 & 6). <br />• An area around one of the windows measured wet with the moisture meter. This area appeared to <br />be rotted (refer to images 2-4). <br />IAQ Data <br />• Particle counts collected in the building were elevated in the assessed areas in the 0.3 and 0.5- <br />micron size ranges. They were elevated in all particle size categories in Room 7. The total <br />particle mass (TPM) in Room 7 was 155.71, which is above the TPM healthy indoor air threshold <br />of 150. <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 />DocuSign Envelope ID: 8114697F-F41C-43F1-AFE2-ADC7016F0955