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Limited Intrusive Microbial Evaluation ATC Project No. <br />22.25172.1 I003 <br />Roseville Fire Station (Building December 15, 2006 <br />Riosevillef Minnesota IPage 2 <br />INTRUSIVE INVESTIGATION OBSERVATIONS <br />ATC inspected the site on December 5, 20,06. David Davis of ATC performed the <br />investigation. The following was observed: <br />• Water damaged and suspect mold impacted wood rafters,, decking, and bridging. <br />• Water Idamalged sheetrock attached to the wood decking. <br />• Suspect mold on fiberglass insulation on ductwork and between the sheetrock and wood <br />rafters. <br />Qi r"^IA e%m +kia W\/A,(' Aiffi ieinr in +Hia Unin+ainnn-ch P%nm <br />W %JUQFf1%;1%1L I I I%JI%A %JI I U J%, I It V I %% <br />MIII1IA%J%1I 51 1 161 1%., IYP%AI1 IL%.Pll P%AF 11.1%-Ol I %WN01 Ill, <br />• Sewer gas odors from the Basement and the wall inspection penetration in the <br />Maintenance Room. <br />• Water damaged suspended ceiling tille 'located above the West Stairway to the <br />Basement and in the Fire Fighter's Day Room area. The walls in these two areas <br />indicate some water damage. <br />Appendix A contains a figure with observations and notes. Appendix B includes <br />photographic documentation. <br />MOISTURE METER INVESTIGATION RIESULTS <br />ATC lutilized a Delmhorst BD-2,100 Moisture Deter to assess moisture content of finis' ih <br />wall <br />materials in the vicinity of the Fire Filghter's Day Room area. The moisture meter displays <br />xt.-%hipe. ir% +e%rv-v%t,- e,►f Dnr^,nn+ KA^ie+iire% All rpnrliki nnr-imeciKla imnie-fimm ranHinng ninflaintpri in <br />V CA I IU 'U *2 11 1 L'%o 1 11 11 %.7 '%J1 I %.r I VA. 1 1116 1 V 11 %J I V L LA I ►-✓ Jr AIR I %.1%A%AIIY "I%' Ill MOPIPW16'"I %W I T-FURIW511 IZ7%.F <br />the vicinity of the Fire Fighter's Day Room area indicated dry conditions. <br />INTRUSIVE INVESTIGATION CONCLUSIONS AND RECOMMENDATIONS <br />Based on the visual observations and moisture readings obtained during the invasive <br />investigation of the affected areas, ATC concludes that the previous roof Ilealks damaged <br />the indicated finish materials and Ipromotled mold growth lin several areas. Areas of mold <br />growth or elevated moisture were not identified around plumbing within the investigated <br />wall cavities of the Fire Station. <br />ATC recommends the following: <br />• RemovaI l of water damaged soft goods such as acoustical ceiling tiles, sheetrock, <br />and fi bergIass. <br />• Cleaning of all water damaged overhead structural wood surfaces Iby employing dry <br />ee%riikkinm/e,nne4inm feN11MA19MA hV nnniie-nflinin of nn nnnrnvari hinnirfo nnrl nnti-mir.rnKi;al <br />%J %.#I W1414i I Jtj I %7"I I %A I I II I W I I WV V 14., 1�4 %0.Y %AV V11 11/ %W41611%A11 11 %OF 1 %0% 1 1 %'A rrf I � V �� � I � W I �� � I I � � 1 ­5 N I " — ---' <br />encapsulant; or surfacing cleaning which employs a method called soda blasting. <br />• IHVAD Duct cleaning for the affected areas,. <br />• All removal, cleaning and enicapsulation work be performed under HEPA filtered <br />negative air containment and be performed by qualified, trained mold remediation <br />personnel. <br />C-14 <br />208925v4 <br />