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Limited Microbial Evaluation ATC Project No. 22.25 172.0003 <br />Roseville Fire Station Building November 17, 2006 <br />Roseville, Minnesota Page 3 <br />Table I presents a synopsis of the non-viable mold air sampling results. <br />Table 1: Non-Viable'Mold Air Samp IeAnalys.iis. <br />Roseville Fire Station, Rosev leg Minnesota <br />Location <br />Fire Fighler's Pay <br />Room <br />Historical -Society <br />Hallway <br />Basement <br />Outdoors. east side:of Wildin 8 <br />near entrance to Building <br />SaMle Number <br />RSV-1 <br />RSV-2 <br />RSv-3 <br />RSV-4 <br />kore L Spore Concentration (Sporeslm,3 <br />Alternaria <br />13 <br />7 <br />13 <br />213 <br />Ascospores <br />640 <br />53 <br />27 <br />2)773 <br />Basidiospores <br />2,1400 <br />373 <br />213 <br />4,907 <br />Botrytis <br />- <br />- <br />- <br />B <br />Cladosporium <br />267 <br />240 <br />93 <br />5,600 <br />E icoccum <br />P <br />Y_ilro2ora <br />7 <br />- <br />93 <br />Other brown <br />7 <br />13 <br />27 <br />13 <br />Other colorless <br />- <br />7 <br />1- <br />13 <br />PenicilliumlAspergillus <br />types <br />2,027 <br />400 <br />373 <br />587 <br />PithoTyces <br />13 <br />Rusts <br />7 <br />13 <br />7 <br />27 <br />Smuts, Myxomycetes, <br />Periconia <br />33 <br />27 <br />53 <br />640 <br />SteT llum <br />- <br />7 <br />- <br />- <br />Oidium <br />13 <br />40 <br />33 <br />Total Spores/m3 <br />5,421 <br />1,180 <br />839 <br />15,012 <br />Appendix A includes the results of the non-viable (spore trap) mold air sampling. <br />DISCUSSION <br />Total non-viable spore concentrations found in the Fire Fighter's Day Room (5,421 spores/m3), the <br />Historical Society Hallway (1,180 spores /m-) and the basement (839 spores/m) were similar and <br />lower than outdoor 1(15,012 spores/m ) total non-viable spore concentrations,, with similar mold taxa <br />dominating the samples. PenicifflumlAspergillm types were detected at a higher concentration in the <br />Fire Fighter's Day Room when compared to the Historical Society Hallway, basement and outdoor <br />samples, which ,were similar in concentration. Therefore, it appears that a reservoir of <br />Pen icilli umlAspergillus and Basildiospores types of mold may exist in or near the Fire Fighter's Day Room. <br />It should be noted that this was a non-intrusive investigation and it is possible that water damaged <br />materials and fungal growth may be present in other areas of the building. This includes, but is not <br />limited to, wallboard, wall cavities, pipe/duct insulation above ceilings and in chases, and wall <br />insulation. <br />W I <br />3 <br />In a building, indoor airborne mold concentrations and types will be shnilar to or lower than outdoor <br />airborne mold concentrations and types, indicating that indoor mold reservoirs and/or amplification <br />(growth) sites are not present. Based on the non-viable spore concentrations from the air sampling <br />C-3 <br />208925v4 <br />