North Seattle College
OP-2: Outdoor Air Quality

The college has implemented a 'No Idling' policy on campus. Employees using gasoline or diesel powered vehicles and light trucks should turn them off if idling more than 30 seconds. Larger diesel vehicles operating under heavy load should be allowed to idle for 3 minutes to cool down. Finally, vehicles should not be left running while unattended. Visitors to campus, including buses and contractor/vendor vehicles are subject to this policy. 'No Idling' signs are placed strategically around campus.

One stationary location and building was conducted, but was not inclusive of the entire campus that included: • Temperature: The temperature in the tested space was fairly consistently and is unlikely to have a negative impact on indoor air quality. • Humidity: The humidity levels at the time of inspection generally remained within the recommended standards in most areas. Locations NSCC-01 and NSCC-02 had brief periods of elevated humidity levels at the beginning of the testing periods. This is likely an aberration caused by device set up and not an indication of a ventilation issue. Sample locations NSCC-03, NSCC-04, NSCC-05 and NSCC-06 showed brief periods where the minimums were slightly below the recommended minimum of 30%, but the averages for all locations were within recommended standards. Those levels of low humidity, measured in this report, may cause complaints of dryness or respiratory irritation in sensitive occupants. This is likely due to an excess of outdoor air that is being introduced through the HVAC system during cold weather. If complaints of dryness or respiratory irritation are made, the client can contact their HVAC contractor and decrease the level of outdoor air being introduced into the environment, but this will likely resolve itself when the temperature increases. • Carbon Dioxide: The carbon dioxide levels in the tested areas were well-within the recommended ranges, if not lower than expected. Sample location NSCC-01 showed a maximum carbon dioxide level of 1461 ppm at the beginning of the testing period. This is likely an aberration cause by device set up and not an indication of a ventilation issue. • Total VOC's (volatile organic compounds): The tVOC levels in the tested areas were well below the recommended levels and is unlikely to have a negative impact on indoor air quality. • Carbon Monoxide: No carbon monoxide was detected during the testing period. • Mold spores: No elevated levels found in the tested locations. Sampling Locations: • NSCC-01: Financial Aid Offices • NSCC-02: Presidential Area • NSCC-03: VP for Students • NSCC-04: Business Office • NSCC-05: Student Services 1 • NSCC-06: Student Services 2

The above test came about out of request by employees from a noted smell that arose due to construction that was in proximity to outdoor intake vents.