Introduction to RMW Instruments Tom Henry RMW Company, Denver CO Tony Hansen Magee Scientific Company, Berkeley CA

22 Smoke and Exhaust: Aesthetic Impacts ·Smoke & exhaust particles absorb and reflect sunlight, contributing to haze ·Regional haze and visibility management important issues in West

33 Smoke and Exhaust: Listed Air Toxics ·Toxic components · Specific compounds require specific chemical analyses · Analyses cumbersome & expensive ·Accompanying components may permit more rapid detection by optical means · Black soot · UV-absorbing material

44 Analytical Basis Optically-absorbing material an indicator for diesel exhaust, wood- and tobacco smoke “Black” carbon (‘BC’, ‘EC’) “UV-absorbing material” (‘UVPM’) Optical analysis is fast, sensitive, can be performed on-the-spot

55 Analytical Method– Optical Absorption

66 Optical vs. Chemical Analyses: Ambient Air “Six Cities Study”: Harvard School of Public Health

77 Optical vs. Chemical Analyses: Tobacco Smoke Report published by Lawrence Berkeley National Laboratory

88 Analytical Instrument: Aethalometer™ While continuously collecting sample, measures optical absorption in real time at 2 wavelengths (880 nm & 370 nm UV) Converts optical absorption to mass concentration of BC and UVPM Real-time data: 1 second / 1 minute / 1 hour

99 Analytical Instrument : Aethalometer™ 19-inch rack mount

10 Analytical Instrument : Aethalometer™ Battery- powered ‘Portable’

11 Fireplace Smoke

12 Cigarette Smoke

13 Agricultural-Burning Smoke

14 Bus Yard Diesel Exhaust– Community Impact

15 Diesel Indoors: Truck Enters Hall

16 On the Bus in Boston

17 In a Car in Boston

18 Summary Black carbon & UV-absorbing carbon indicate diesel exhaust, wood smoke, tobacco smoke Aethalometer™ uses optical method to measure BC and UVPM in real time Aethalometer on-the-spot data equivalent to standard chemical analyses

19 Acknowledgments Harvard School of Public Health Lawrence Berkeley National Laboratory For further information Representative Tom Henry, RMW Company, (303)