Otters, birds, and turtles might be the last animals you would expect to find living next door to the Interstate 680 toll-plaza. But, tucked between the freeway, an oil refinery and a wastewater facility hides an oasis on the mend. … The 21-acre constructed wetland is in the middle of an industrial zone and is part of the Mt. View Sanitary District Wastewater Treatment Plant. “It’s the very first wetland on the west coast to use treated wastewater to create wetlands,” explained district biologist Kelly Davidson.