1 / 17

Jack Springston, CIH, CSP William Esposito, CIH JinFu Liu, MS am bient labs, inc. New York, NY

Seasonal Variations in Indoor Air Quality Measurements In Metropolitan New York Commercial Buildings Between 1992-1998. Jack Springston, CIH, CSP William Esposito, CIH JinFu Liu, MS am bient labs, inc. New York, NY. Proactive IAQ Surveys. 757 surveys in 125 commercial office buildings

leann
Download Presentation

Jack Springston, CIH, CSP William Esposito, CIH JinFu Liu, MS am bient labs, inc. New York, NY

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Seasonal Variations in Indoor Air Quality Measurements In Metropolitan New York Commercial BuildingsBetween 1992-1998 Jack Springston, CIH, CSP William Esposito, CIH JinFu Liu, MS ambient labs, inc. New York, NY

  2. Proactive IAQ Surveys • 757 surveys in 125 commercial office buildings • Conducted between June 1992 and December 1998 • Sampling strategy based on EPA’s Protocol for Characterizing Indoor Air Quality in Large Office Buildings

  3. Proactive IAQ Surveys • Sampling included CO2, CO, TVOC’s, temperature, relative humidity and particulates • 18,500+ samples collected • Sampling for gaseous contaminants performed using a Brüel & Kjær Multi-gas Monitor Type 1302

  4. Proactive IAQ Surveys • Temperature measured with a thin-film capacitance sensor (4.0 - 140.0oF + 1.5oF) • Relative humidity measured with a diode type sensor (10.0 - 95.0% + 3.0%) • Sampling for particulates performed using a MIE Personal DataRam (0.1 - 10um)

  5. B&K 1302 Monitor • Photoacoustic Spectroscopy (PAS) • Detection limit is gas-dependent but typically 10-3ppm region • Use different filters to measure up to 5 component gases plus water vapor

  6. B&K 1302 Monitor • For this study, we measured at VOC’s, CO and CO2 • Used two different filters for VOC’s • 3.4um for “common” VOC’s • 3.6um for formaldehyde

  7. VOC Sampling • Organic compounds detected at center wavelength 3.4 µm include: Butane, Ethyl benzene, Ethanol, Formic acid, Methyl ethyl ketone, Naphta, Petroleum distillates, Toluene, Turpentine, and Xylene • Detection limit = 0.036 mg/m3

  8. VOC Sampling • Organic compounds detected at center wavelength 3.6 µm include: Acetaldehyde, Acrolein, Formaldehyde, N-Methyl-Methanamine, Triethylamine • Detection limit = 0.07 mg/m3

  9. Carbon Dioxide Results • Summer CO2 readings(n = 9077) : • range 328 to 1960ppm • mean = 614.5ppm (SD = 152.2ppm) • Winter CO2 readings(n = 9627) : • range 356 to 2040ppm • mean = 619.1ppm (SD = 135.0ppm) • p = 0.013

  10. Carbon Monoxide Results • Summer CO readings(n = 9036) : • range 0.0 to 13.5ppm • mean = 1.45ppm (SD = 1.31ppm) • Winter CO readings(n = 8616) : • range 0.0 to 29.5ppm • mean = 1.72ppm (SD = 1.55ppm) • p = <<0.01 (8.05 x 10-86)

  11. TVOC’s 3.4um Results • Summer Group I readings(n = 9006) : • range <0.036 to 48.42 mg/m3 • mean = 1.25 mg/m3 (SD = 2.06 mg/m3) • Winter Group I readings (n = 9642) : • range <0.036 to 58.86 mg/m3 • mean = 1.21 mg/m3 (SD = 1.51 mg/m3) • p = 0.085

  12. TVOC’s 3.6um Results • Summer Group II readings(n = 8136) : • range <0.07 to 23.88 mg/m3 • mean = 0.37 mg/m3 (SD = 0.85 mg/m3) • Winter Group II readings (n = 8683) : • range <0.07 to 9.80 mg/m3 • mean = 0.43 mg/m3 (SD = 0.49 mg/m3) • p = <<0.01 (2.21 x 10-07)

  13. Temperature Results • Summer Temperatures(n = 8215) : • range 58.8 to 88.9oF • mean = 73.95oF(SD = 2.50oF) • Winter Temperatures (n = 8280) : • range 46.8 to 85.9oF • mean = 74.37oF (SD of 2.46oF) • p = <<0.01 (3.59 x 10-27)

  14. Relative Humidity Results • Summer RH readings(n = 8198) : • range 8.9 to 86.3% • mean = 41.9%(SD = 12.8%) • Winter RH readings (n = 8223) : • range 3.9 to 88.4% • mean = 28.7%(SD = 11.3%) • p = <<<0.01

  15. Particulate Results • Summer Particulate readings(n = 5561) : • range <0.001 to 0.94 mg/m3 • mean = 0.0199 mg/m3 (SD = 0.048 mg/m3) • Winter Particulate readings (n = 5857) : • range <0.001 to 0.980 mg/m3 • mean = 0.0423 mg/m3 (SD = 0.101 mg/m3) • p = <<0.01 (4.98 x 10-51)

  16. Conclusions • Results indicate that the average CO, CO2, Group II TVOC, Temperature, and Particulate readings from non-complaint buildings are significantly higher, and Relative Humidity levels are significantly lower, in winter months vs. summer months

  17. Conclusions • Differences for gaseous parameters are most probably due to less outside air being brought into the building (dilution ventilation) • Differences for particulate levels is probably related to RH levels

More Related