5.8. SR 06-05-2006 - Laserfiche WebLink

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Elk River Parks & Recreation Indoor Air Quality Assessment IE.;\ Project No. 7805-1301 Page 5 Concentration Qualitative Assessment (colony formin2 units/2ram) of Funeal Counts in Carpet Dust < 1 00,000 Not a significant presence of fungal spores. Ho\vever, there lTIay still be an indication of interior gro\vth if donlinant* or upper-ranked taxa are associated \vith gro\vth on moisture-impacted building materials. 100,000 to 1,000,000 Suggestive of Fungal Gro\vth if donlinant* or upper-ranked taxa are associated \vith gro\vth on moisture-inlpacted building materials. Or Suggestive of Migration from the outdoors if dominant taxa are COffiITIOn outdoor fungi. The greater the fungal count levels, the greater the likelihood that the carpet should be considered dirty. > 1,000,000 Indicative of interior Fungal Gro\vth if dominant* or upper-ranked taxa are associated \vith gro\vth on nloisture-impacted building materials, Or Inadequate removal of outdoor fungal spores through cleaning if dominant taxa are common outdoor fungi. *For this table, dominant is defined as constituting greater than fifty percent of the total fungal concentration. . Discussion of Results Fungal concentrations in the dust collected fronl belo\v the chair nlat in the South\vest Cubicle indicate the presence of fungal gro\vth on the carpet. Aspergillus versicolor \vas dominant in the sample. Heavy fungal concentrations \vere present in the dust collected from along the \vall in the South\vest Office. Aspergillus versicolor \vas dominant in the sample. These results indicate that fungal gro\\/ih has occurred on the carpet. 4.5 General Indoor Air Quality Parameters Carbon dioxide, carbon monoxide, ten1perature and relative huntidity levels \vere n1easured in each complaint area and outdoors for comparison. Results are listed belo\v: Table 5: GenerallAQ Parameters - May 9, 2006 Location Time No. of Carbon Dioxide I Carbon IVlonoxide Temperature Rela tive Occ. (CO2) (CO) (OF) Humidity (ppm) (ppm) (0/0 ) Cubicle Area 2:20 pm 1 605 0 74 43 IYlichelle's Office 2:22 pm 1 I 622 0 74 44 Bill's Office 2:24 pm 1 629 0 74 44 Outdoors 2:25 pm - 359 0 70 43 Ouick Reference Guideline: At present, indoor air quality regulatory limits do not exist apart from OSHA's Permissible Exposure Linlits (PELs), \vhich \vere developed for traditional industrial environments and are not a suitable n1easure of good indoor air quality. The follo\ving guidelines have generally been adopted by the practitioners of indoor air quality. . Carbon Dioxide (C02) The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) Standard 62- 1989, Ventilation for Acceptable Indoor Air Quality, recommends as a guideline that indoor CO2 levels do not exceed over 700 ppm above the outdoor CO2 level. Generally, the number of reported air quality complaints tends to increase as the CO2 levels climb past 1,200 ppm. If CO2 levels significantly exceed 1,200 ppn1 in occupied areas, additional evaluation should be considered \vhich may include ventilation or specific contaminant testing. . Carbon I\Ionoxide (CO) Recomn1ended indoor air quality guidelines have been proposed to maintain indoor CO levels belo\\' 10 ppm. Headaches, nausea and dizziness can be reported \vhen CO levels approach and exceed 10 ppm, Ho\vever, in most indoor environments \vithout a knO\Vll CO source, a CO level of 5 ppm should be considered significant and additional investigation is \varranted. C:\Documents and Settings\tallard\Local Settings\Ten1porary Internet Files\OLKF\attach to 5 8.doc