Northwest Foundation of Washington: 

April 24: Properly dispose of household hazardous waste at King County
Wastemobile, April 25-27, in Auburn
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King County Washington on 24 April, 2008 08:04:34
 
Residents of south King County can drop off hazardous household waste items free
of charge at the King County Wastemobile collection event, April 25-27, in
Auburn.