Officials from the town of Ayer are expressing concern over Evergreen Solar’s safety procedures at its plant in Deven, Mass. after three spills of toxic material were reported from the plant. The plant has been in operation since July. In October, the first spill occurred: 500 gallons of a toxic "cocktail" that included hydrofluoric, nitric and sulfuric acids. In February, 100 gallons of sodium hydroxide was released. In March, 20 gallons of 20-30% hydron peroxide … Read the rest