"OLYMPIA, Wash. -- The state Supreme Court unanimously ruled Thursday that the state's hazardous substances tax is constitutional."

"The high court upheld a King County Superior Court ruling that found the state is not precluded from using the current tax of 0.7 percent imposed on oil products, pesticides and other chemicals for environmental cleanup projects.

The state has said the tax, approved by voters in 1988, brings in about $125 million a year for those projects.

The Automotive United Trades Organization and California-based Tower Energy Group had argued that that the levy is a gas tax that should be used only for highways and roads under the state Constitution's 18th amendment, which dedicates motor fuel tax collections to highway purposes."

Rachel La Corte reports for the Associated Press October 4, 2012. [2]