Google announced plans on Wednesday to open an engineering facility in Arizona that will employ 600 people or more. The company, which is hiring an average of 10 people a day, recently announced plans to build a 1 million square-foot building on the NASA Ames Research Center not far from its Mountain View, Calif., headquarters. However, state and local officials in California have said they will look for ways to make sure Google pays its fair share of taxes on the deal. In fact, one county official estimated property tax could be as much as $3 million, according to the San Francisco Chronicle. Asked to comment on the tax issue, Google spokeswoman Lynn Fox said: "At this early stage in the agreement, it is too early to discuss additional details on Google's physical presence at the Ames Research site."