Here's some information on the area source category of fluorescent bulbs (lamp breakage and lamp recycling). For 2002, I had used EPA's example 1999 NEI methodology to estimate 66.43 lbs from lamp breakage and 0.006 lbs from lamp recycling. Since creating that estimate, Leah Granke (one of AQD's toxicology staff) worked on an enhanced mercury inventory for Michigan and found alternate ways to estimate mercury for some categories. She used an EPA Flow Diagram to revise the mercury estimate for lamp breakage and recycling, resulting in an approximate doubling of the emissions to 136 lbs. I've attached an excerpt from Michigan's 2002 report on mercury from anthropogenic emissions. Note that it contains two different estimates for the quantity of mercury per lamp (0.0116 g and 0.0274 g). The lower estimate reflects lamps currently produced which are broken by consumers during installation, and the higher estimate represents older bulbs (about 5 years old) which reach the end of their service life and are broken as they become part of the municipal solid waste stream. Would staff like to see the US EPA Flow Diagram? It is basically a calculation routine built into an Excel spreadsheet, and is a nice (but slightly complicated) tool to use. Leah Granke left AQD to go back to grad school, but if staff are interested I can refresh myself on use of the flow diagram so that I can provide some information to the group about its use. Dennis Dennis McGeen Michigan Dept. of Environmental Quality Air Quality Division Emissions, Reporting & Assessment Unit mcgeendd@michigan.gov tx: 517-373-7061 fax: 517-241-7499
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Fluorescent Lamps.doc
Description: MS-Word document