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Mr. Rick DeGardner <br />Lino Lake Police Department <br />Indoor Air Quality and Fungal Sampling Results <br />IHSC Project Number: M20-694 <br />May 6, 2020 <br />Page 4 of 7 <br />In a properly operating air conveyance system, the indoor concentration of airborne fungal <br />spores should be approximately the same or less than the concentration of airborne spores <br />detected outside of the building. <br />Time of year plays a significant role in determining fungal species present and relative <br />indoor and outdoor airborne fungal concentrations. Activities within the building will also <br />influence conditions that may support fungal growth that is unique to the outside of the <br />building. In general, the following criteria can be used to make a determination that <br />conditions exist on the interior of the building that are unique and may require further <br />investigation: <br />1. Predominate (upper 90% of total) fungi present indoors are not detected outdoors. <br />2. The predominate genera found indoors is different than the genera found <br />outdoors. <br />3. Unusual evidence of fungal growth or water staining of building material is noted in <br />the area where samples are collected. <br />4. Comparison of data obtained from the same areas within a similar timeframe <br />reveal significantly divergent results. <br />The laboratory results of the mold air samples showed that the indoor sample total mold <br />concentrations were much lower in the sample areas in comparison with the level <br />measured on the exterior of the building. The rank order and diversity of mold in the indoor <br />samples were similar to the outdoor sample. <br />The laboratory results and chain of custody is attached to this report in Attachment 1, <br />Laboratory Results and Chain of Custody. <br />Fungal Tease Tape Sample Results <br />The fungal tease tape was collected from the supply diffuser in the work out room. Results <br />are as follows: <br />Spore Type <br />Results <br />Alternaria <br />Rare 1-10 count <br />Bipolaris <br />Rare 1-10 count <br />Cladosporium <br />High >1000 count <br />The high count of Cladosporium is indicative of possible fungal growth in the air handler <br />and supply ductwork. More investigation would be required to inspect the ductwork and air <br />handler. <br />• <br />• <br />