California Air Monitoring: From Inception to Current Trends in the New Millennium
ENVR POSTER SESSION: Wednesday evening August 13, 2014 6pm California Air Monitoring: From Inception to Current Trends in the New Millennium J. Maclachlan, Organizer; J. Driscoll, Organizer; J. Maclachlan, Presiding Papers 586-587 Title: Monitoring and control of pump and treat systems in gasoline stations Abstract Body: One of the most serious contamination problems in LA in the early 2000's was leaking from underground gasoline storage tanks. At high levels of VOC's (thousands of ppm), the pump and treat effluent can simply be flared. At about 1,000 ppm, it requires too much auxiliary fuel to burn the effluent. A new collection system such as a carbon bed is required. Continuous monitoring is required to determine when breakthrough of the VOC's occurs. Then, the carbon bed should be changed. The most popular technique for carbon bed monitoring is photoionization and the 112 instrument includes a programmable setpoint that shuts down the pum