The whole "Environmental remediation" bill? Or the whole ballpark bill.
I believe you have a strong case for the state (small s so including all governments) absorbing a large portion of the environmental costs and nearly all the risks of cost overruns for the environmental issues in an urban renewal sense, because that's a lot of money and risk for any developer to deal with and if the state doesn't step in and deal with that, this site may well be undeveloped for another 60 years.
I very much agree that with the potential economic benefits of developing this site, if the White Sox are going to buy the land and develop the whole property, they should pay a large portion of the ballpark expenses. But first of all...bringing this site up to code is a cost that almost certainly should be born by the state because the White Sox likely had very little to do with this becoming polluted and abandoned.
Furthermore, the state is justified in paying at least a portion of the initial development costs - not a majority, but a minority portion. Why? Because it is to the state's benefit to have this site developed long-term. Leaving this land outside the tax base for the next 50 years is not an exaggeration - it's already been that way for more than 60. Bringing this land back into the tax base, even if it is 30 years from now, is a good thing for the city. Developing this site supports the land values around this site, and supports the city as a whole. These are all good things for the city and for taxpayers, and it justifies some portion of additional taxpayer support of the ballpark. Not a majority, a partnership though, with either assistance developing the site or appropriate tax benefits.
Unlike true frauds like the Foxconn "plant" in Wisconsin or even New Comiskey, public subsidies here is likely to actually lead to development and to an overall improvement of the city and state. That's a big benefit of having the White Sox involved - the chances of the White Sox deciding that they don't need to play baseball in the USA are quite low, the chances of the White Sox deciding to stop playing baseball if the commercial office market space shrinks is low. This is a benefit to the city of working with this specific industry type on developing the location, the city is going to get the ballpark developed if they come to an agreement, the White Sox won't back out and decide that they are ok playing in a small ballpark overseas for the next 30 years. The White Sox anchor this site and that ensures the site is actually developed, improving the city, improving the tax base long term, and removing a blighted spot that is a negative for the city.
There is a solid justification for some public funds here, for both remediation and for making sure the site gets developed. It does not pay for a full ballpark, but support well beyond "only paying for infrastructure" is well justified as a public good.