EPA, at http://www.epa.gov/ebtpages/alphabet.html links to many other sites under its heading for "Acetone". 2 main links are under Acetone as a soil contaminant.
"IRIS: Acetone: CASRN 67-64-1" at: http://www.epa.gov/iris/subst/0128.htm has 19 html pages of acetone information from EPA's IRIS (Integrated Risk Information System), including 4 pages of references from health sciences-toxicology journals and technical papers and reports.
The other link, "Envirofacts Warehouse Chemical References: Acetone: CAS # 67 - 64 - 1" at: http://www.epa.gov/envirofw/html/emci/chemref/67641.html in turn links to the Environmental Defense Fund's "Chemical Scorecard" on Acetone, at: http://www.scorecard.org/chemical-profiles/summary.tcl?edf_substance_id=67-64-1 One of the many links on this EDF page is the NJ Dept. of Health and Senior Services' 6-page "Hazardous Substances Fact Sheet" on Acetone, at: http://www.state.nj.us/health/eoh/rtkweb/0006.pdf
Getting information on actual cases will probably require access to Lexis Academic or other legal databases. But the search may be quite tricky. The search: acetone and stone and cleaning (in Legal Research/Law Reviews/all avail dates) gets many things like acetone cleanup costs, with a mention of "stone" in a figure of speaach like "casting the first stone", etc. The search: Environmental impact and acetone gets 25 hits, and they may be more on target.
If access to Lexis Academic (on site only, and at large academic libraries) is impractical, it is possible you could get some free information via http://scholar.google.com, with searches like:
acetone "environmental impact" stone cleaning (57 hits, but once again, "Stone" is often an author's name, etc.). The search for the phrase "stone cleaning" is not promising. Google Scholar gets only 5 hits for: "environmental impact" "stone cleaning". In Google's web search, "environmental impact" "stone cleaning" solvents gets 7 hits. Possibly you can get results with other searches on the Web, such as: "environmental impact" acetone masonry site:edu (6 hits), "environmental impact" solvents masonry site:edu (79 hits), etc.