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<br />Elk River Parks & Recreation <br />Indoor Air Quality .A.ssessment <br />lEA. Project No. 7805-1301 <br /> <br />Page 6 <br /> <br />. Temperature and Relative Humidity <br />Temperature and relative humidity levels affect the thermal comfort of an individual. Other factors, <br />including air speed, activity level, metabolic rate, and clothing also affect thermal conlfort. ASHRAE <br />Standard 55- I 992 provides recommendations for temperature and relative hunlidity during w"inter nlonths and <br />sununer months. lEA's guidelines are based on this standard. lEA reconunends that the temperature should <br />be benveen approxinlately 680F to 750F during the \vinter and 730F to 790P during the summer. lEA <br />recommends that humidity levels be maintained \vithin the range of approximately 30% to 60%. <br /> <br />. Discussion of Results <br /> <br />Carbon dioxide, temperature and relative hunlidity levels \vere all \vithin the reconunended range. No <br />carbon monoxide \vas detected. <br /> <br />4.6 Ventilation Measurements <br /> <br />Airflo\v measurenlents and the outdoor air calculation percentages are provided belo\v: <br /> <br />Table 6: Ventilation lVleasurements <br /> <br />Location of Diffuser/Grate Airflo,,, (cfrn) Approximate % Outdoor Air <br />Supply Air Diffusers <br />Ross's Cubicle 200 1 I <br />Terry's Cubicle 200 34 <br />Office to Right of Main Entry 0 N/A <br />Reception Area 0 N/A <br />Bill's Office 135 6 <br />Michelle's Office 135 23 <br />Return Air Grates <br />Office by ivlain Entry 190 N/A <br />Reception Area 360 N/A <br />ivlichelle's Office 110 N/A <br />Bill's Office 90 N/A <br /> <br />. Discussion of Results <br /> <br />Total supply air measured \vas 670 cubic feet per minute (cfnl) compared to 750 cfIn return air. No <br />airflo\v \vas detected from the nvo diffusers in the front office and reception area. The measuren1ents <br />suggest that the building may be under slight negative pressure resulting in air infiltration. <br /> <br />Outdoor air percentage in the supply air diffusers ranged from about 6 to 34 percent. The level of <br />carbon dioxide in the air (see Table 5) indicates that the outdoor air supply is adequate. <br /> <br />5.0 Conclusions & Recommendations <br /> <br />Fungal san1pling results indicate that fungal gro\v1h has occurred on the top and bottom surfaces of the <br />carpet in the South\vest Cubicle and the South\vest Office. Visible fungal gro\vth \vas observed behind the <br />base cove along the exterior \vall in the north\vest comer of the South\vest Office and the south\vest corner <br />of the South\vest Cubicle. Airborne fungal sampling results indicate that the fungal contanlination has <br />in1pacted air quality in these areas. <br /> <br />Based on TEA's observations and sampling results, the follo\ving actions are reconmlended: <br /> <br />. Fungal-contanlinated carpet and \vallboard should be removed under controlled conditions. Additional <br />sampling may be necessary to determine the extent of the contamination. If fungal contan1ination is <br />present in the \vall cavity in the area \vhere fungal gro\vth \vas observed behind the base cove, <br />insulation \vill need to be removed and the \vall surfaces cleaned and sanitized prior to rebuilding. lEA <br />can provide a scope of \vork for the fungal abatement, if desired. <br /> <br />C:\Documents and Settings\tallard\Local Settings\Temporary Internet Files\OLKF\attach to 5 S,doc <br />