The California Air Resources Board (CARB) earlier this month announces it has approved a new set of regulations governing the specific content and properties of gasoline sold in California. Key among the new regulations — known as California Phase 3 — is the banning of gasoline oxygenate MTBE, widely used in California's reformulated gasoline (RFG), but now known to pose serious risks to groundwater supplies. It is estimated that MTBE holds 85% of the oxygenate market for reformulated ...

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