Council members approved the project's environmental impact report back in April. But they still haven't signed off on zoning issues. And it's still unclear exactly where toxic railyard dirt will be buried.

"Now is the time for the council to draw a line in the sand and say 'you must not have toxics in the residential area.'"

Rosanna Herber is president of the Sierra-Curtis Park Neighborhood Association. State law allows some of the toxic dirt to be buried under the development. But Herber says it should not go under a proposed park.

"That leaves the liability with the taxpayers and the city. That's not acceptable to us."

She says the toxic dirt should go under commercial buildings, which would leave Petrovich Development Company liable…that's the developer behind Curtis Park Village. Petrovich representatives say any toxic dirt that remains can be safely buried underground and capped with impermeable plastic.